Mercurial > cpython-lru_cache-weakref

annotate Objects/floatobject.c @ 68965:e1ebec2446cd 2.7

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Issue #11144: Fix corner cases where float-to-int conversion unnecessarily returned a long.
author Mark Dickinson <mdickinson@enthought.com>
date Sat, 26 Mar 2011 12:18:00 +0000
parents b36cb4602e21
children eaf553b063a7
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1
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2 /* Float object implementation */
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3
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4 /* XXX There should be overflow checks here, but it's hard to check
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5 for any kind of float exception without losing portability. */
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6
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7 #include "Python.h"
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8 #include "structseq.h"
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9
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10 #include <ctype.h>
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11 #include <float.h>
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12
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13 #undef MAX
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14 #undef MIN
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15 #define MAX(x, y) ((x) < (y) ? (y) : (x))
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16 #define MIN(x, y) ((x) < (y) ? (x) : (y))
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17
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18 #ifdef _OSF_SOURCE
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19 /* OSF1 5.1 doesn't make this available with XOPEN_SOURCE_EXTENDED defined */
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20 extern int finite(double);
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21 #endif
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22
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23 /* Special free list -- see comments for same code in intobject.c. */
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24 #define BLOCK_SIZE 1000 /* 1K less typical malloc overhead */
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25 #define BHEAD_SIZE 8 /* Enough for a 64-bit pointer */
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26 #define N_FLOATOBJECTS ((BLOCK_SIZE - BHEAD_SIZE) / sizeof(PyFloatObject))
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27
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28 struct _floatblock {
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29 struct _floatblock *next;
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30 PyFloatObject objects[N_FLOATOBJECTS];
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31 };
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33 typedef struct _floatblock PyFloatBlock;
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34
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35 static PyFloatBlock *block_list = NULL;
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36 static PyFloatObject *free_list = NULL;
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37
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38 static PyFloatObject *
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39 fill_free_list(void)
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40 {
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41 PyFloatObject *p, *q;
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42 /* XXX Float blocks escape the object heap. Use PyObject_MALLOC ??? */
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43 p = (PyFloatObject *) PyMem_MALLOC(sizeof(PyFloatBlock));
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44 if (p == NULL)
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45 return (PyFloatObject *) PyErr_NoMemory();
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46 ((PyFloatBlock *)p)->next = block_list;
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47 block_list = (PyFloatBlock *)p;
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48 p = &((PyFloatBlock *)p)->objects[0];
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49 q = p + N_FLOATOBJECTS;
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50 while (--q > p)
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51 Py_TYPE(q) = (struct _typeobject *)(q-1);
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52 Py_TYPE(q) = NULL;
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53 return p + N_FLOATOBJECTS - 1;
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54 }
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55
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56 double
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57 PyFloat_GetMax(void)
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58 {
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59 return DBL_MAX;
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60 }
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61
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62 double
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63 PyFloat_GetMin(void)
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64 {
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65 return DBL_MIN;
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66 }
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67
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68 static PyTypeObject FloatInfoType = {0, 0, 0, 0, 0, 0};
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70 PyDoc_STRVAR(floatinfo__doc__,
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71 "sys.float_info\n\
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72 \n\
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73 A structseq holding information about the float type. It contains low level\n\
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74 information about the precision and internal representation. Please study\n\
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75 your system's :file:`float.h` for more information.");
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76
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77 static PyStructSequence_Field floatinfo_fields[] = {
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78 {"max", "DBL_MAX -- maximum representable finite float"},
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79 {"max_exp", "DBL_MAX_EXP -- maximum int e such that radix**(e-1) "
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80 "is representable"},
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81 {"max_10_exp", "DBL_MAX_10_EXP -- maximum int e such that 10**e "
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82 "is representable"},
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83 {"min", "DBL_MIN -- Minimum positive normalizer float"},
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84 {"min_exp", "DBL_MIN_EXP -- minimum int e such that radix**(e-1) "
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85 "is a normalized float"},
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86 {"min_10_exp", "DBL_MIN_10_EXP -- minimum int e such that 10**e is "
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87 "a normalized"},
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88 {"dig", "DBL_DIG -- digits"},
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89 {"mant_dig", "DBL_MANT_DIG -- mantissa digits"},
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90 {"epsilon", "DBL_EPSILON -- Difference between 1 and the next "
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91 "representable float"},
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92 {"radix", "FLT_RADIX -- radix of exponent"},
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93 {"rounds", "FLT_ROUNDS -- addition rounds"},
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94 {0}
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95 };
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96
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97 static PyStructSequence_Desc floatinfo_desc = {
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98 "sys.float_info", /* name */
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99 floatinfo__doc__, /* doc */
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100 floatinfo_fields, /* fields */
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101 11
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102 };
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103
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104 PyObject *
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105 PyFloat_GetInfo(void)
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106 {
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107 PyObject* floatinfo;
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108 int pos = 0;
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109
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110 floatinfo = PyStructSequence_New(&FloatInfoType);
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111 if (floatinfo == NULL) {
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112 return NULL;
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113 }
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114
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115 #define SetIntFlag(flag) \
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116 PyStructSequence_SET_ITEM(floatinfo, pos++, PyInt_FromLong(flag))
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117 #define SetDblFlag(flag) \
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118 PyStructSequence_SET_ITEM(floatinfo, pos++, PyFloat_FromDouble(flag))
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119
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120 SetDblFlag(DBL_MAX);
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121 SetIntFlag(DBL_MAX_EXP);
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122 SetIntFlag(DBL_MAX_10_EXP);
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123 SetDblFlag(DBL_MIN);
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124 SetIntFlag(DBL_MIN_EXP);
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125 SetIntFlag(DBL_MIN_10_EXP);
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126 SetIntFlag(DBL_DIG);
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127 SetIntFlag(DBL_MANT_DIG);
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128 SetDblFlag(DBL_EPSILON);
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129 SetIntFlag(FLT_RADIX);
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130 SetIntFlag(FLT_ROUNDS);
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131 #undef SetIntFlag
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132 #undef SetDblFlag
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133
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134 if (PyErr_Occurred()) {
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135 Py_CLEAR(floatinfo);
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136 return NULL;
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137 }
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138 return floatinfo;
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139 }
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140
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141 PyObject *
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142 PyFloat_FromDouble(double fval)
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143 {
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144 register PyFloatObject *op;
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145 if (free_list == NULL) {
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146 if ((free_list = fill_free_list()) == NULL)
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147 return NULL;
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148 }
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149 /* Inline PyObject_New */
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150 op = free_list;
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151 free_list = (PyFloatObject *)Py_TYPE(op);
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152 PyObject_INIT(op, &PyFloat_Type);
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153 op->ob_fval = fval;
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154 return (PyObject *) op;
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155 }
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156
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157 /**************************************************************************
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158 RED_FLAG 22-Sep-2000 tim
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159 PyFloat_FromString's pend argument is braindead. Prior to this RED_FLAG,
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160
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161 1. If v was a regular string, *pend was set to point to its terminating
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162 null byte. That's useless (the caller can find that without any
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163 help from this function!).
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164
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165 2. If v was a Unicode string, or an object convertible to a character
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166 buffer, *pend was set to point into stack trash (the auto temp
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167 vector holding the character buffer). That was downright dangerous.
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168
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169 Since we can't change the interface of a public API function, pend is
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170 still supported but now *officially* useless: if pend is not NULL,
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171 *pend is set to NULL.
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172 **************************************************************************/
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173 PyObject *
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174 PyFloat_FromString(PyObject *v, char **pend)
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175 {
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176 const char *s, *last, *end;
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177 double x;
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178 char buffer[256]; /* for errors */
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179 #ifdef Py_USING_UNICODE
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180 char *s_buffer = NULL;
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181 #endif
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182 Py_ssize_t len;
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183 PyObject *result = NULL;
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184
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185 if (pend)
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186 *pend = NULL;
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187 if (PyString_Check(v)) {
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188 s = PyString_AS_STRING(v);
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189 len = PyString_GET_SIZE(v);
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190 }
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191 #ifdef Py_USING_UNICODE
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192 else if (PyUnicode_Check(v)) {
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193 s_buffer = (char *)PyMem_MALLOC(PyUnicode_GET_SIZE(v)+1);
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194 if (s_buffer == NULL)
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195 return PyErr_NoMemory();
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196 if (PyUnicode_EncodeDecimal(PyUnicode_AS_UNICODE(v),
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197 PyUnicode_GET_SIZE(v),
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198 s_buffer,
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199 NULL))
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200 goto error;
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201 s = s_buffer;
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202 len = strlen(s);
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203 }
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204 #endif
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205 else if (PyObject_AsCharBuffer(v, &s, &len)) {
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206 PyErr_SetString(PyExc_TypeError,
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207 "float() argument must be a string or a number");
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208 return NULL;
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209 }
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210 last = s + len;
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211
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212 while (Py_ISSPACE(*s))
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213 s++;
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214 /* We don't care about overflow or underflow. If the platform
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215 * supports them, infinities and signed zeroes (on underflow) are
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216 * fine. */
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217 x = PyOS_string_to_double(s, (char **)&end, NULL);
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218 if (x == -1.0 && PyErr_Occurred())
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219 goto error;
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220 while (Py_ISSPACE(*end))
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221 end++;
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222 if (end == last)
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223 result = PyFloat_FromDouble(x);
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224 else {
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225 PyOS_snprintf(buffer, sizeof(buffer),
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226 "invalid literal for float(): %.200s", s);
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227 PyErr_SetString(PyExc_ValueError, buffer);
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228 result = NULL;
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229 }
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230
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231 error:
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232 #ifdef Py_USING_UNICODE
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233 if (s_buffer)
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234 PyMem_FREE(s_buffer);
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235 #endif
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236 return result;
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237 }
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238
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239 static void
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240 float_dealloc(PyFloatObject *op)
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241 {
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242 if (PyFloat_CheckExact(op)) {
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243 Py_TYPE(op) = (struct _typeobject *)free_list;
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244 free_list = op;
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245 }
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246 else
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247 Py_TYPE(op)->tp_free((PyObject *)op);
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248 }
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249
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250 double
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251 PyFloat_AsDouble(PyObject *op)
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252 {
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253 PyNumberMethods *nb;
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254 PyFloatObject *fo;
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255 double val;
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256
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257 if (op && PyFloat_Check(op))
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258 return PyFloat_AS_DOUBLE((PyFloatObject*) op);
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259
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260 if (op == NULL) {
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261 PyErr_BadArgument();
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262 return -1;
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263 }
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264
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265 if ((nb = Py_TYPE(op)->tp_as_number) == NULL || nb->nb_float == NULL) {
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266 PyErr_SetString(PyExc_TypeError, "a float is required");
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267 return -1;
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268 }
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269
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270 fo = (PyFloatObject*) (*nb->nb_float) (op);
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271 if (fo == NULL)
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272 return -1;
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273 if (!PyFloat_Check(fo)) {
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274 PyErr_SetString(PyExc_TypeError,
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275 "nb_float should return float object");
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276 return -1;
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277 }
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278
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279 val = PyFloat_AS_DOUBLE(fo);
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280 Py_DECREF(fo);
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281
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282 return val;
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283 }
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284
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285 /* Methods */
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286
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287 /* Macro and helper that convert PyObject obj to a C double and store
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288 the value in dbl; this replaces the functionality of the coercion
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289 slot function. If conversion to double raises an exception, obj is
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290 set to NULL, and the function invoking this macro returns NULL. If
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291 obj is not of float, int or long type, Py_NotImplemented is incref'ed,
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292 stored in obj, and returned from the function invoking this macro.
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293 */
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294 #define CONVERT_TO_DOUBLE(obj, dbl) \
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295 if (PyFloat_Check(obj)) \
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296 dbl = PyFloat_AS_DOUBLE(obj); \
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297 else if (convert_to_double(&(obj), &(dbl)) < 0) \
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298 return obj;
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299
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300 static int
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301 convert_to_double(PyObject **v, double *dbl)
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302 {
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303 register PyObject *obj = *v;
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304
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305 if (PyInt_Check(obj)) {
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306 *dbl = (double)PyInt_AS_LONG(obj);
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307 }
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308 else if (PyLong_Check(obj)) {
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309 *dbl = PyLong_AsDouble(obj);
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310 if (*dbl == -1.0 && PyErr_Occurred()) {
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311 *v = NULL;
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312 return -1;
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313 }
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314 }
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315 else {
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316 Py_INCREF(Py_NotImplemented);
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317 *v = Py_NotImplemented;
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318 return -1;
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319 }
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320 return 0;
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321 }
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322
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323 /* XXX PyFloat_AsString and PyFloat_AsReprString are deprecated:
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324 XXX they pass a char buffer without passing a length.
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325 */
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326 void
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327 PyFloat_AsString(char *buf, PyFloatObject *v)
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328 {
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329 char *tmp = PyOS_double_to_string(v->ob_fval, 'g',
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330 PyFloat_STR_PRECISION,
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331 Py_DTSF_ADD_DOT_0, NULL);
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332 strcpy(buf, tmp);
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333 PyMem_Free(tmp);
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334 }
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335
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336 void
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337 PyFloat_AsReprString(char *buf, PyFloatObject *v)
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338 {
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339 char * tmp = PyOS_double_to_string(v->ob_fval, 'r', 0,
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340 Py_DTSF_ADD_DOT_0, NULL);
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341 strcpy(buf, tmp);
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342 PyMem_Free(tmp);
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343 }
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344
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345 /* ARGSUSED */
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346 static int
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347 float_print(PyFloatObject *v, FILE *fp, int flags)
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348 {
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349 char *buf;
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350 if (flags & Py_PRINT_RAW)
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351 buf = PyOS_double_to_string(v->ob_fval,
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352 'g', PyFloat_STR_PRECISION,
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353 Py_DTSF_ADD_DOT_0, NULL);
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354 else
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355 buf = PyOS_double_to_string(v->ob_fval,
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356 'r', 0, Py_DTSF_ADD_DOT_0, NULL);
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357 Py_BEGIN_ALLOW_THREADS
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358 fputs(buf, fp);
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359 Py_END_ALLOW_THREADS
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360 PyMem_Free(buf);
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361 return 0;
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362 }
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363
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364 static PyObject *
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365 float_str_or_repr(PyFloatObject *v, int precision, char format_code)
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366 {
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367 PyObject *result;
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368 char *buf = PyOS_double_to_string(PyFloat_AS_DOUBLE(v),
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369 format_code, precision,
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370 Py_DTSF_ADD_DOT_0,
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371 NULL);
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372 if (!buf)
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373 return PyErr_NoMemory();
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374 result = PyString_FromString(buf);
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375 PyMem_Free(buf);
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376 return result;
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377 }
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378
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379 static PyObject *
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380 float_repr(PyFloatObject *v)
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381 {
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382 return float_str_or_repr(v, 0, 'r');
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383 }
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384
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385 static PyObject *
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386 float_str(PyFloatObject *v)
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387 {
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388 return float_str_or_repr(v, PyFloat_STR_PRECISION, 'g');
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389 }
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390
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391 /* Comparison is pretty much a nightmare. When comparing float to float,
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392 * we do it as straightforwardly (and long-windedly) as conceivable, so
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393 * that, e.g., Python x == y delivers the same result as the platform
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394 * C x == y when x and/or y is a NaN.
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395 * When mixing float with an integer type, there's no good *uniform* approach.
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396 * Converting the double to an integer obviously doesn't work, since we
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397 * may lose info from fractional bits. Converting the integer to a double
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398 * also has two failure modes: (1) a long int may trigger overflow (too
702367da2c72 SF bug #513866: Float/long comparison anomaly.
Tim Peters <tim.peters@gmail.com>
parents: 32533
diff changeset
399 * large to fit in the dynamic range of a C double); (2) even a C long may have
702367da2c72 SF bug #513866: Float/long comparison anomaly.
Tim Peters <tim.peters@gmail.com>
parents: 32533
diff changeset
400 * more bits than fit in a C double (e.g., on a a 64-bit box long may have
702367da2c72 SF bug #513866: Float/long comparison anomaly.
Tim Peters <tim.peters@gmail.com>
parents: 32533
diff changeset
401 * 63 bits of precision, but a C double probably has only 53), and then
702367da2c72 SF bug #513866: Float/long comparison anomaly.
Tim Peters <tim.peters@gmail.com>
parents: 32533
diff changeset
402 * we can falsely claim equality when low-order integer bits are lost by
702367da2c72 SF bug #513866: Float/long comparison anomaly.
Tim Peters <tim.peters@gmail.com>
parents: 32533
diff changeset
403 * coercion to double. So this part is painful too.
702367da2c72 SF bug #513866: Float/long comparison anomaly.
Tim Peters <tim.peters@gmail.com>
parents: 32533
diff changeset
404 */
702367da2c72 SF bug #513866: Float/long comparison anomaly.
Tim Peters <tim.peters@gmail.com>
parents: 32533
diff changeset
405
31553
a6d8d5ace6a7 "Fix" (for certain configurations of the planets, including
Michael W. Hudson <mwh@python.net>
parents: 31384
diff changeset
406 static PyObject*
a6d8d5ace6a7 "Fix" (for certain configurations of the planets, including
Michael W. Hudson <mwh@python.net>
parents: 31384
diff changeset
407 float_richcompare(PyObject *v, PyObject *w, int op)
a6d8d5ace6a7 "Fix" (for certain configurations of the planets, including
Michael W. Hudson <mwh@python.net>
parents: 31384
diff changeset
408 {
61465
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diff changeset
409 double i, j;
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diff changeset
410 int r = 0;
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Michael W. Hudson <mwh@python.net>
parents: 31384
diff changeset
411
61465
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diff changeset
412 assert(PyFloat_Check(v));
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diff changeset
413 i = PyFloat_AS_DOUBLE(v);
33547
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Tim Peters <tim.peters@gmail.com>
parents: 32533
diff changeset
414
61465
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415 /* Switch on the type of w. Set i and j to doubles to be compared,
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416 * and op to the richcomp to use.
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417 */
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418 if (PyFloat_Check(w))
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419 j = PyFloat_AS_DOUBLE(w);
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Tim Peters <tim.peters@gmail.com>
parents: 32533
diff changeset
420
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421 else if (!Py_IS_FINITE(i)) {
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422 if (PyInt_Check(w) || PyLong_Check(w))
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423 /* If i is an infinity, its magnitude exceeds any
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424 * finite integer, so it doesn't matter which int we
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425 * compare i with. If i is a NaN, similarly.
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426 */
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427 j = 0.0;
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diff changeset
428 else
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429 goto Unimplemented;
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430 }
33547
702367da2c72 SF bug #513866: Float/long comparison anomaly.
Tim Peters <tim.peters@gmail.com>
parents: 32533
diff changeset
431
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432 else if (PyInt_Check(w)) {
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diff changeset
433 long jj = PyInt_AS_LONG(w);
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434 /* In the worst realistic case I can imagine, C double is a
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435 * Cray single with 48 bits of precision, and long has 64
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diff changeset
436 * bits.
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437 */
33549
ecaf0e8fa737 float_richcompare(): Use the new Py_IS_NAN macro to ensure that, on
Tim Peters <tim.peters@gmail.com>
parents: 33547
diff changeset
438 #if SIZEOF_LONG > 6
61465
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439 unsigned long abs = (unsigned long)(jj < 0 ? -jj : jj);
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diff changeset
440 if (abs >> 48) {
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441 /* Needs more than 48 bits. Make it take the
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diff changeset
442 * PyLong path.
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diff changeset
443 */
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444 PyObject *result;
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diff changeset
445 PyObject *ww = PyLong_FromLong(jj);
33547
702367da2c72 SF bug #513866: Float/long comparison anomaly.
Tim Peters <tim.peters@gmail.com>
parents: 32533
diff changeset
446
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447 if (ww == NULL)
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448 return NULL;
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449 result = float_richcompare(v, ww, op);
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450 Py_DECREF(ww);
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451 return result;
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452 }
33547
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Tim Peters <tim.peters@gmail.com>
parents: 32533
diff changeset
453 #endif
61465
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454 j = (double)jj;
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diff changeset
455 assert((long)j == jj);
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456 }
33547
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Tim Peters <tim.peters@gmail.com>
parents: 32533
diff changeset
457
61465
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458 else if (PyLong_Check(w)) {
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diff changeset
459 int vsign = i == 0.0 ? 0 : i < 0.0 ? -1 : 1;
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diff changeset
460 int wsign = _PyLong_Sign(w);
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diff changeset
461 size_t nbits;
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diff changeset
462 int exponent;
31553
a6d8d5ace6a7 "Fix" (for certain configurations of the planets, including
Michael W. Hudson <mwh@python.net>
parents: 31384
diff changeset
463
61465
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diff changeset
464 if (vsign != wsign) {
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parents: 54002
diff changeset
465 /* Magnitudes are irrelevant -- the signs alone
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parents: 54002
diff changeset
466 * determine the outcome.
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diff changeset
467 */
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468 i = (double)vsign;
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parents: 54002
diff changeset
469 j = (double)wsign;
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parents: 54002
diff changeset
470 goto Compare;
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parents: 54002
diff changeset
471 }
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diff changeset
472 /* The signs are the same. */
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diff changeset
473 /* Convert w to a double if it fits. In particular, 0 fits. */
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diff changeset
474 nbits = _PyLong_NumBits(w);
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diff changeset
475 if (nbits == (size_t)-1 && PyErr_Occurred()) {
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parents: 54002
diff changeset
476 /* This long is so large that size_t isn't big enough
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
477 * to hold the # of bits. Replace with little doubles
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
478 * that give the same outcome -- w is so large that
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parents: 54002
diff changeset
479 * its magnitude must exceed the magnitude of any
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parents: 54002
diff changeset
480 * finite float.
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diff changeset
481 */
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diff changeset
482 PyErr_Clear();
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diff changeset
483 i = (double)vsign;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
484 assert(wsign != 0);
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parents: 54002
diff changeset
485 j = wsign * 2.0;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
486 goto Compare;
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parents: 54002
diff changeset
487 }
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parents: 54002
diff changeset
488 if (nbits <= 48) {
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parents: 54002
diff changeset
489 j = PyLong_AsDouble(w);
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diff changeset
490 /* It's impossible that <= 48 bits overflowed. */
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diff changeset
491 assert(j != -1.0 || ! PyErr_Occurred());
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diff changeset
492 goto Compare;
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parents: 54002
diff changeset
493 }
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diff changeset
494 assert(wsign != 0); /* else nbits was 0 */
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diff changeset
495 assert(vsign != 0); /* if vsign were 0, then since wsign is
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diff changeset
496 * not 0, we would have taken the
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Antoine Pitrou <solipsis@pitrou.net>
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diff changeset
497 * vsign != wsign branch at the start */
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diff changeset
498 /* We want to work with non-negative numbers. */
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parents: 54002
diff changeset
499 if (vsign < 0) {
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parents: 54002
diff changeset
500 /* "Multiply both sides" by -1; this also swaps the
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
501 * comparator.
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parents: 54002
diff changeset
502 */
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parents: 54002
diff changeset
503 i = -i;
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Antoine Pitrou <solipsis@pitrou.net>
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diff changeset
504 op = _Py_SwappedOp[op];
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parents: 54002
diff changeset
505 }
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diff changeset
506 assert(i > 0.0);
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diff changeset
507 (void) frexp(i, &exponent);
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diff changeset
508 /* exponent is the # of bits in v before the radix point;
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diff changeset
509 * we know that nbits (the # of bits in w) > 48 at this point
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diff changeset
510 */
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diff changeset
511 if (exponent < 0 || (size_t)exponent < nbits) {
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diff changeset
512 i = 1.0;
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parents: 54002
diff changeset
513 j = 2.0;
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diff changeset
514 goto Compare;
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parents: 54002
diff changeset
515 }
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diff changeset
516 if ((size_t)exponent > nbits) {
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Antoine Pitrou <solipsis@pitrou.net>
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diff changeset
517 i = 2.0;
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diff changeset
518 j = 1.0;
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diff changeset
519 goto Compare;
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diff changeset
520 }
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diff changeset
521 /* v and w have the same number of bits before the radix
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diff changeset
522 * point. Construct two longs that have the same comparison
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diff changeset
523 * outcome.
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parents: 54002
diff changeset
524 */
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diff changeset
525 {
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parents: 54002
diff changeset
526 double fracpart;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
527 double intpart;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
528 PyObject *result = NULL;
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parents: 54002
diff changeset
529 PyObject *one = NULL;
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parents: 54002
diff changeset
530 PyObject *vv = NULL;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
531 PyObject *ww = w;
33547
702367da2c72 SF bug #513866: Float/long comparison anomaly.
Tim Peters <tim.peters@gmail.com>
parents: 32533
diff changeset
532
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
533 if (wsign < 0) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
534 ww = PyNumber_Negative(w);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
535 if (ww == NULL)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
536 goto Error;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
537 }
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
538 else
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
539 Py_INCREF(ww);
33547
702367da2c72 SF bug #513866: Float/long comparison anomaly.
Tim Peters <tim.peters@gmail.com>
parents: 32533
diff changeset
540
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
541 fracpart = modf(i, &intpart);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
542 vv = PyLong_FromDouble(intpart);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
543 if (vv == NULL)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
544 goto Error;
33547
702367da2c72 SF bug #513866: Float/long comparison anomaly.
Tim Peters <tim.peters@gmail.com>
parents: 32533
diff changeset
545
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
546 if (fracpart != 0.0) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
547 /* Shift left, and or a 1 bit into vv
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
548 * to represent the lost fraction.
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
549 */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
550 PyObject *temp;
33547
702367da2c72 SF bug #513866: Float/long comparison anomaly.
Tim Peters <tim.peters@gmail.com>
parents: 32533
diff changeset
551
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
552 one = PyInt_FromLong(1);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
553 if (one == NULL)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
554 goto Error;
33547
702367da2c72 SF bug #513866: Float/long comparison anomaly.
Tim Peters <tim.peters@gmail.com>
parents: 32533
diff changeset
555
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
556 temp = PyNumber_Lshift(ww, one);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
557 if (temp == NULL)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
558 goto Error;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
559 Py_DECREF(ww);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
560 ww = temp;
33547
702367da2c72 SF bug #513866: Float/long comparison anomaly.
Tim Peters <tim.peters@gmail.com>
parents: 32533
diff changeset
561
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
562 temp = PyNumber_Lshift(vv, one);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
563 if (temp == NULL)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
564 goto Error;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
565 Py_DECREF(vv);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
566 vv = temp;
33547
702367da2c72 SF bug #513866: Float/long comparison anomaly.
Tim Peters <tim.peters@gmail.com>
parents: 32533
diff changeset
567
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
568 temp = PyNumber_Or(vv, one);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
569 if (temp == NULL)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
570 goto Error;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
571 Py_DECREF(vv);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
572 vv = temp;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
573 }
33547
702367da2c72 SF bug #513866: Float/long comparison anomaly.
Tim Peters <tim.peters@gmail.com>
parents: 32533
diff changeset
574
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
575 r = PyObject_RichCompareBool(vv, ww, op);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
576 if (r < 0)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
577 goto Error;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
578 result = PyBool_FromLong(r);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
579 Error:
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
580 Py_XDECREF(vv);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
581 Py_XDECREF(ww);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
582 Py_XDECREF(one);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
583 return result;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
584 }
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
585 } /* else if (PyLong_Check(w)) */
33547
702367da2c72 SF bug #513866: Float/long comparison anomaly.
Tim Peters <tim.peters@gmail.com>
parents: 32533
diff changeset
586
61465
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
587 else /* w isn't float, int, or long */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
588 goto Unimplemented;
33547
702367da2c72 SF bug #513866: Float/long comparison anomaly.
Tim Peters <tim.peters@gmail.com>
parents: 32533
diff changeset
589
702367da2c72 SF bug #513866: Float/long comparison anomaly.
Tim Peters <tim.peters@gmail.com>
parents: 32533
diff changeset
590 Compare:
61465
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
591 PyFPE_START_PROTECT("richcompare", return NULL)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
592 switch (op) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
593 case Py_EQ:
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
594 r = i == j;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
595 break;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
596 case Py_NE:
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
597 r = i != j;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
598 break;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
599 case Py_LE:
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
600 r = i <= j;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
601 break;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
602 case Py_GE:
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
603 r = i >= j;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
604 break;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
605 case Py_LT:
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
606 r = i < j;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
607 break;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
608 case Py_GT:
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
609 r = i > j;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
610 break;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
611 }
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
612 PyFPE_END_PROTECT(r)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
613 return PyBool_FromLong(r);
33547
702367da2c72 SF bug #513866: Float/long comparison anomaly.
Tim Peters <tim.peters@gmail.com>
parents: 32533
diff changeset
614
702367da2c72 SF bug #513866: Float/long comparison anomaly.
Tim Peters <tim.peters@gmail.com>
parents: 32533
diff changeset
615 Unimplemented:
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
616 Py_INCREF(Py_NotImplemented);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
617 return Py_NotImplemented;
31553
a6d8d5ace6a7 "Fix" (for certain configurations of the planets, including
Michael W. Hudson <mwh@python.net>
parents: 31384
diff changeset
618 }
a6d8d5ace6a7 "Fix" (for certain configurations of the planets, including
Michael W. Hudson <mwh@python.net>
parents: 31384
diff changeset
619
1257
1cabc2b6c970 * Changed all copyright messages to include 1993.
Guido van Rossum <guido@python.org>
parents: 1252
diff changeset
620 static long
13454
fcc75a3748f5 ANSI-fication of the sources.
Fred Drake <fdrake@acm.org>
parents: 13447
diff changeset
621 float_hash(PyFloatObject *v)
1257
1cabc2b6c970 * Changed all copyright messages to include 1993.
Guido van Rossum <guido@python.org>
parents: 1252
diff changeset
622 {
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
623 return _Py_HashDouble(v->ob_fval);
1257
1cabc2b6c970 * Changed all copyright messages to include 1993.
Guido van Rossum <guido@python.org>
parents: 1252
diff changeset
624 }
1cabc2b6c970 * Changed all copyright messages to include 1993.
Guido van Rossum <guido@python.org>
parents: 1252
diff changeset
625
5396
d1447950fa04 Quickly renamed the last directory.
Guido van Rossum <guido@python.org>
parents: 5197
diff changeset
626 static PyObject *
15723
ac7ae3ead88a Make float a new style number type.
Neil Schemenauer <nascheme@enme.ucalgary.ca>
parents: 15318
diff changeset
627 float_add(PyObject *v, PyObject *w)
6
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
628 {
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
629 double a,b;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
630 CONVERT_TO_DOUBLE(v, a);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
631 CONVERT_TO_DOUBLE(w, b);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
632 PyFPE_START_PROTECT("add", return 0)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
633 a = a + b;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
634 PyFPE_END_PROTECT(a)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
635 return PyFloat_FromDouble(a);
6
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
636 }
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
637
5396
d1447950fa04 Quickly renamed the last directory.
Guido van Rossum <guido@python.org>
parents: 5197
diff changeset
638 static PyObject *
15723
ac7ae3ead88a Make float a new style number type.
Neil Schemenauer <nascheme@enme.ucalgary.ca>
parents: 15318
diff changeset
639 float_sub(PyObject *v, PyObject *w)
6
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
640 {
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
641 double a,b;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
642 CONVERT_TO_DOUBLE(v, a);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
643 CONVERT_TO_DOUBLE(w, b);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
644 PyFPE_START_PROTECT("subtract", return 0)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
645 a = a - b;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
646 PyFPE_END_PROTECT(a)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
647 return PyFloat_FromDouble(a);
6
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
648 }
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
649
5396
d1447950fa04 Quickly renamed the last directory.
Guido van Rossum <guido@python.org>
parents: 5197
diff changeset
650 static PyObject *
15723
ac7ae3ead88a Make float a new style number type.
Neil Schemenauer <nascheme@enme.ucalgary.ca>
parents: 15318
diff changeset
651 float_mul(PyObject *v, PyObject *w)
6
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
652 {
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
653 double a,b;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
654 CONVERT_TO_DOUBLE(v, a);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
655 CONVERT_TO_DOUBLE(w, b);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
656 PyFPE_START_PROTECT("multiply", return 0)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
657 a = a * b;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
658 PyFPE_END_PROTECT(a)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
659 return PyFloat_FromDouble(a);
6
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
660 }
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
661
5396
d1447950fa04 Quickly renamed the last directory.
Guido van Rossum <guido@python.org>
parents: 5197
diff changeset
662 static PyObject *
15723
ac7ae3ead88a Make float a new style number type.
Neil Schemenauer <nascheme@enme.ucalgary.ca>
parents: 15318
diff changeset
663 float_div(PyObject *v, PyObject *w)
6
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
664 {
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
665 double a,b;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
666 CONVERT_TO_DOUBLE(v, a);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
667 CONVERT_TO_DOUBLE(w, b);
46473
5bc7b20dc04a I finally got the time to update and merge Mark's and my trunk-math branch. The patch is collaborated work of Mark Dickinson and me. It was mostly done a few months ago. The patch fixes a lot of loose ends and edge cases related to operations with NaN, INF, very small values and complex math.
Christian Heimes <christian@cheimes.de>
parents: 46154
diff changeset
668 #ifdef Py_NAN
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
669 if (b == 0.0) {
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670 PyErr_SetString(PyExc_ZeroDivisionError,
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671 "float division by zero");
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672 return NULL;
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673 }
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5bc7b20dc04a I finally got the time to update and merge Mark's and my trunk-math branch. The patch is collaborated work of Mark Dickinson and me. It was mostly done a few months ago. The patch fixes a lot of loose ends and edge cases related to operations with NaN, INF, very small values and complex math.
Christian Heimes <christian@cheimes.de>
parents: 46154
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674 #endif
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675 PyFPE_START_PROTECT("divide", return 0)
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676 a = a / b;
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677 PyFPE_END_PROTECT(a)
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678 return PyFloat_FromDouble(a);
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679 }
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680
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681 static PyObject *
19633
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682 float_classic_div(PyObject *v, PyObject *w)
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683 {
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684 double a,b;
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685 CONVERT_TO_DOUBLE(v, a);
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686 CONVERT_TO_DOUBLE(w, b);
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687 if (Py_DivisionWarningFlag >= 2 &&
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688 PyErr_Warn(PyExc_DeprecationWarning, "classic float division") < 0)
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689 return NULL;
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5bc7b20dc04a I finally got the time to update and merge Mark's and my trunk-math branch. The patch is collaborated work of Mark Dickinson and me. It was mostly done a few months ago. The patch fixes a lot of loose ends and edge cases related to operations with NaN, INF, very small values and complex math.
Christian Heimes <christian@cheimes.de>
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690 #ifdef Py_NAN
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691 if (b == 0.0) {
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692 PyErr_SetString(PyExc_ZeroDivisionError,
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693 "float division by zero");
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694 return NULL;
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695 }
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5bc7b20dc04a I finally got the time to update and merge Mark's and my trunk-math branch. The patch is collaborated work of Mark Dickinson and me. It was mostly done a few months ago. The patch fixes a lot of loose ends and edge cases related to operations with NaN, INF, very small values and complex math.
Christian Heimes <christian@cheimes.de>
parents: 46154
diff changeset
696 #endif
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697 PyFPE_START_PROTECT("divide", return 0)
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698 a = a / b;
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699 PyFPE_END_PROTECT(a)
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700 return PyFloat_FromDouble(a);
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701 }
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702
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Guido van Rossum <guido@python.org>
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703 static PyObject *
15723
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Neil Schemenauer <nascheme@enme.ucalgary.ca>
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704 float_rem(PyObject *v, PyObject *w)
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705 {
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706 double vx, wx;
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707 double mod;
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708 CONVERT_TO_DOUBLE(v, vx);
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709 CONVERT_TO_DOUBLE(w, wx);
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5bc7b20dc04a I finally got the time to update and merge Mark's and my trunk-math branch. The patch is collaborated work of Mark Dickinson and me. It was mostly done a few months ago. The patch fixes a lot of loose ends and edge cases related to operations with NaN, INF, very small values and complex math.
Christian Heimes <christian@cheimes.de>
parents: 46154
diff changeset
710 #ifdef Py_NAN
61465
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711 if (wx == 0.0) {
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712 PyErr_SetString(PyExc_ZeroDivisionError,
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713 "float modulo");
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714 return NULL;
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715 }
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5bc7b20dc04a I finally got the time to update and merge Mark's and my trunk-math branch. The patch is collaborated work of Mark Dickinson and me. It was mostly done a few months ago. The patch fixes a lot of loose ends and edge cases related to operations with NaN, INF, very small values and complex math.
Christian Heimes <christian@cheimes.de>
parents: 46154
diff changeset
716 #endif
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717 PyFPE_START_PROTECT("modulo", return 0)
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718 mod = fmod(vx, wx);
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719 if (mod) {
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720 /* ensure the remainder has the same sign as the denominator */
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721 if ((wx < 0) != (mod < 0)) {
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722 mod += wx;
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723 }
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724 }
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725 else {
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726 /* the remainder is zero, and in the presence of signed zeroes
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727 fmod returns different results across platforms; ensure
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728 it has the same sign as the denominator; we'd like to do
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729 "mod = wx * 0.0", but that may get optimized away */
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730 mod *= mod; /* hide "mod = +0" from optimizer */
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731 if (wx < 0.0)
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732 mod = -mod;
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733 }
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734 PyFPE_END_PROTECT(mod)
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735 return PyFloat_FromDouble(mod);
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736 }
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737
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738 static PyObject *
15723
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Neil Schemenauer <nascheme@enme.ucalgary.ca>
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739 float_divmod(PyObject *v, PyObject *w)
227
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parents: 145
diff changeset
740 {
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741 double vx, wx;
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742 double div, mod, floordiv;
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743 CONVERT_TO_DOUBLE(v, vx);
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744 CONVERT_TO_DOUBLE(w, wx);
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745 if (wx == 0.0) {
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746 PyErr_SetString(PyExc_ZeroDivisionError, "float divmod()");
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747 return NULL;
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748 }
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749 PyFPE_START_PROTECT("divmod", return 0)
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750 mod = fmod(vx, wx);
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751 /* fmod is typically exact, so vx-mod is *mathematically* an
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752 exact multiple of wx. But this is fp arithmetic, and fp
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753 vx - mod is an approximation; the result is that div may
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754 not be an exact integral value after the division, although
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755 it will always be very close to one.
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756 */
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757 div = (vx - mod) / wx;
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758 if (mod) {
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759 /* ensure the remainder has the same sign as the denominator */
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760 if ((wx < 0) != (mod < 0)) {
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761 mod += wx;
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762 div -= 1.0;
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763 }
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764 }
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765 else {
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766 /* the remainder is zero, and in the presence of signed zeroes
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767 fmod returns different results across platforms; ensure
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768 it has the same sign as the denominator; we'd like to do
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769 "mod = wx * 0.0", but that may get optimized away */
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770 mod *= mod; /* hide "mod = +0" from optimizer */
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771 if (wx < 0.0)
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772 mod = -mod;
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773 }
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774 /* snap quotient to nearest integral value */
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775 if (div) {
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776 floordiv = floor(div);
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777 if (div - floordiv > 0.5)
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778 floordiv += 1.0;
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779 }
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780 else {
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781 /* div is zero - get the same sign as the true quotient */
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782 div *= div; /* hide "div = +0" from optimizers */
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783 floordiv = div * vx / wx; /* zero w/ sign of vx/wx */
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784 }
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785 PyFPE_END_PROTECT(floordiv)
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786 return Py_BuildValue("(dd)", floordiv, mod);
227
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787 }
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788
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789 static PyObject *
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790 float_floor_div(PyObject *v, PyObject *w)
257c938900a6 float_int_div(): For clarity, move this closer to the other float
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parents: 21097
diff changeset
791 {
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792 PyObject *t, *r;
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793
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794 t = float_divmod(v, w);
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795 if (t == NULL || t == Py_NotImplemented)
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796 return t;
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797 assert(PyTuple_CheckExact(t));
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798 r = PyTuple_GET_ITEM(t, 0);
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diff changeset
799 Py_INCREF(r);
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diff changeset
800 Py_DECREF(t);
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Antoine Pitrou <solipsis@pitrou.net>
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diff changeset
801 return r;
21353
257c938900a6 float_int_div(): For clarity, move this closer to the other float
Tim Peters <tim.peters@gmail.com>
parents: 21097
diff changeset
802 }
257c938900a6 float_int_div(): For clarity, move this closer to the other float
Tim Peters <tim.peters@gmail.com>
parents: 21097
diff changeset
803
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Mark Dickinson <dickinsm@gmail.com>
parents: 57485
diff changeset
804 /* determine whether x is an odd integer or not; assumes that
ac5fd8909998 Issue #7534: Fix handling of nans, infinities, and negative zero in **
Mark Dickinson <dickinsm@gmail.com>
parents: 57485
diff changeset
805 x is not an infinity or nan. */
ac5fd8909998 Issue #7534: Fix handling of nans, infinities, and negative zero in **
Mark Dickinson <dickinsm@gmail.com>
parents: 57485
diff changeset
806 #define DOUBLE_IS_ODD_INTEGER(x) (fmod(fabs(x), 2.0) == 1.0)
ac5fd8909998 Issue #7534: Fix handling of nans, infinities, and negative zero in **
Mark Dickinson <dickinsm@gmail.com>
parents: 57485
diff changeset
807
21353
257c938900a6 float_int_div(): For clarity, move this closer to the other float
Tim Peters <tim.peters@gmail.com>
parents: 21097
diff changeset
808 static PyObject *
15723
ac7ae3ead88a Make float a new style number type.
Neil Schemenauer <nascheme@enme.ucalgary.ca>
parents: 15318
diff changeset
809 float_pow(PyObject *v, PyObject *w, PyObject *z)
6
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Guido van Rossum <guido@python.org>
parents:
diff changeset
810 {
61465
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diff changeset
811 double iv, iw, ix;
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diff changeset
812 int negate_result = 0;
19666
cf65ebf87560 New restriction on pow(x, y, z): If z is not None, x and y must be of
Tim Peters <tim.peters@gmail.com>
parents: 19633
diff changeset
813
61465
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814 if ((PyObject *)z != Py_None) {
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diff changeset
815 PyErr_SetString(PyExc_TypeError, "pow() 3rd argument not "
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diff changeset
816 "allowed unless all arguments are integers");
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817 return NULL;
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818 }
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cf65ebf87560 New restriction on pow(x, y, z): If z is not None, x and y must be of
Tim Peters <tim.peters@gmail.com>
parents: 19633
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819
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diff changeset
820 CONVERT_TO_DOUBLE(v, iv);
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parents: 54002
diff changeset
821 CONVERT_TO_DOUBLE(w, iw);
15041
7eefde90ec0e SF bug 115831 and Ping's SF patch 101751, 0.0**-2.0 returns inf rather than
Tim Peters <tim.peters@gmail.com>
parents: 14869
diff changeset
822
61465
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diff changeset
823 /* Sort out special cases here instead of relying on pow() */
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parents: 54002
diff changeset
824 if (iw == 0) { /* v**0 is 1, even 0**0 */
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diff changeset
825 return PyFloat_FromDouble(1.0);
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826 }
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827 if (Py_IS_NAN(iv)) { /* nan**w = nan, unless w == 0 */
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828 return PyFloat_FromDouble(iv);
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829 }
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diff changeset
830 if (Py_IS_NAN(iw)) { /* v**nan = nan, unless v == 1; 1**nan = 1 */
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parents: 61323
diff changeset
831 return PyFloat_FromDouble(iv == 1.0 ? 1.0 : iw);
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parents: 61323
diff changeset
832 }
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diff changeset
833 if (Py_IS_INFINITY(iw)) {
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parents: 61323
diff changeset
834 /* v**inf is: 0.0 if abs(v) < 1; 1.0 if abs(v) == 1; inf if
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Antoine Pitrou <solipsis@pitrou.net>
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diff changeset
835 * abs(v) > 1 (including case where v infinite)
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Antoine Pitrou <solipsis@pitrou.net>
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diff changeset
836 *
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Antoine Pitrou <solipsis@pitrou.net>
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diff changeset
837 * v**-inf is: inf if abs(v) < 1; 1.0 if abs(v) == 1; 0.0 if
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Antoine Pitrou <solipsis@pitrou.net>
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diff changeset
838 * abs(v) > 1 (including case where v infinite)
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Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
839 */
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Antoine Pitrou <solipsis@pitrou.net>
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diff changeset
840 iv = fabs(iv);
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Antoine Pitrou <solipsis@pitrou.net>
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diff changeset
841 if (iv == 1.0)
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Antoine Pitrou <solipsis@pitrou.net>
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diff changeset
842 return PyFloat_FromDouble(1.0);
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diff changeset
843 else if ((iw > 0.0) == (iv > 1.0))
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parents: 61323
diff changeset
844 return PyFloat_FromDouble(fabs(iw)); /* return inf */
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parents: 61323
diff changeset
845 else
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parents: 61323
diff changeset
846 return PyFloat_FromDouble(0.0);
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parents: 61323
diff changeset
847 }
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diff changeset
848 if (Py_IS_INFINITY(iv)) {
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Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
849 /* (+-inf)**w is: inf for w positive, 0 for w negative; in
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Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
850 * both cases, we need to add the appropriate sign if w is
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Antoine Pitrou <solipsis@pitrou.net>
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diff changeset
851 * an odd integer.
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Antoine Pitrou <solipsis@pitrou.net>
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diff changeset
852 */
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diff changeset
853 int iw_is_odd = DOUBLE_IS_ODD_INTEGER(iw);
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Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
854 if (iw > 0.0)
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Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
855 return PyFloat_FromDouble(iw_is_odd ? iv : fabs(iv));
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Antoine Pitrou <solipsis@pitrou.net>
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diff changeset
856 else
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diff changeset
857 return PyFloat_FromDouble(iw_is_odd ?
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Antoine Pitrou <solipsis@pitrou.net>
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diff changeset
858 copysign(0.0, iv) : 0.0);
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Antoine Pitrou <solipsis@pitrou.net>
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diff changeset
859 }
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Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
860 if (iv == 0.0) { /* 0**w is: 0 for w positive, 1 for w zero
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Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
861 (already dealt with above), and an error
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Antoine Pitrou <solipsis@pitrou.net>
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diff changeset
862 if w is negative. */
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parents: 61323
diff changeset
863 int iw_is_odd = DOUBLE_IS_ODD_INTEGER(iw);
61465
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864 if (iw < 0.0) {
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diff changeset
865 PyErr_SetString(PyExc_ZeroDivisionError,
61463
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diff changeset
866 "0.0 cannot be raised to a "
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diff changeset
867 "negative power");
61465
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868 return NULL;
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parents: 54002
diff changeset
869 }
61463
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diff changeset
870 /* use correct sign if iw is odd */
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
871 return PyFloat_FromDouble(iw_is_odd ? iv : 0.0);
61465
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Antoine Pitrou <solipsis@pitrou.net>
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872 }
58001
ac5fd8909998 Issue #7534: Fix handling of nans, infinities, and negative zero in **
Mark Dickinson <dickinsm@gmail.com>
parents: 57485
diff changeset
873
61465
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diff changeset
874 if (iv < 0.0) {
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parents: 54002
diff changeset
875 /* Whether this is an error is a mess, and bumps into libm
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
876 * bugs so we have to figure it out ourselves.
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parents: 54002
diff changeset
877 */
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Antoine Pitrou <solipsis@pitrou.net>
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diff changeset
878 if (iw != floor(iw)) {
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Antoine Pitrou <solipsis@pitrou.net>
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diff changeset
879 PyErr_SetString(PyExc_ValueError, "negative number "
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Antoine Pitrou <solipsis@pitrou.net>
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diff changeset
880 "cannot be raised to a fractional power");
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diff changeset
881 return NULL;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
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diff changeset
882 }
61463
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parents: 61323
diff changeset
883 /* iw is an exact integer, albeit perhaps a very large
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Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
884 * one. Replace iv by its absolute value and remember
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
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diff changeset
885 * to negate the pow result if iw is odd.
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
886 */
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Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
887 iv = -iv;
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Antoine Pitrou <solipsis@pitrou.net>
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diff changeset
888 negate_result = DOUBLE_IS_ODD_INTEGER(iw);
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
889 }
58001
ac5fd8909998 Issue #7534: Fix handling of nans, infinities, and negative zero in **
Mark Dickinson <dickinsm@gmail.com>
parents: 57485
diff changeset
890
61463
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diff changeset
891 if (iv == 1.0) { /* 1**w is 1, even 1**inf and 1**nan */
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
892 /* (-1) ** large_integer also ends up here. Here's an
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
893 * extract from the comments for the previous
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
894 * implementation explaining why this special case is
fd25030223b0 Untabify C files. Will watch buildbots.
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parents: 61323
diff changeset
895 * necessary:
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
896 *
61465
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diff changeset
897 * -1 raised to an exact integer should never be exceptional.
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parents: 54002
diff changeset
898 * Alas, some libms (chiefly glibc as of early 2003) return
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
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parents: 54002
diff changeset
899 * NaN and set EDOM on pow(-1, large_int) if the int doesn't
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parents: 54002
diff changeset
900 * happen to be representable in a *C* integer. That's a
61463
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Antoine Pitrou <solipsis@pitrou.net>
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diff changeset
901 * bug.
61465
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diff changeset
902 */
61463
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diff changeset
903 return PyFloat_FromDouble(negate_result ? -1.0 : 1.0);
61465
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Antoine Pitrou <solipsis@pitrou.net>
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904 }
58001
ac5fd8909998 Issue #7534: Fix handling of nans, infinities, and negative zero in **
Mark Dickinson <dickinsm@gmail.com>
parents: 57485
diff changeset
905
61463
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Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
906 /* Now iv and iw are finite, iw is nonzero, and iv is
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Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
907 * positive and not equal to 1.0. We finally allow
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Antoine Pitrou <solipsis@pitrou.net>
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diff changeset
908 * the platform pow to step in and do the rest.
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Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
909 */
61465
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diff changeset
910 errno = 0;
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diff changeset
911 PyFPE_START_PROTECT("pow", return NULL)
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parents: 54002
diff changeset
912 ix = pow(iv, iw);
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diff changeset
913 PyFPE_END_PROTECT(ix)
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diff changeset
914 Py_ADJUST_ERANGE1(ix);
61463
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diff changeset
915 if (negate_result)
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Antoine Pitrou <solipsis@pitrou.net>
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diff changeset
916 ix = -ix;
58001
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Mark Dickinson <dickinsm@gmail.com>
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diff changeset
917
61465
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diff changeset
918 if (errno != 0) {
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diff changeset
919 /* We don't expect any errno value other than ERANGE, but
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parents: 54002
diff changeset
920 * the range of libm bugs appears unbounded.
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diff changeset
921 */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
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diff changeset
922 PyErr_SetFromErrno(errno == ERANGE ? PyExc_OverflowError :
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parents: 54002
diff changeset
923 PyExc_ValueError);
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parents: 54002
diff changeset
924 return NULL;
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diff changeset
925 }
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diff changeset
926 return PyFloat_FromDouble(ix);
6
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diff changeset
927 }
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
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diff changeset
928
58001
ac5fd8909998 Issue #7534: Fix handling of nans, infinities, and negative zero in **
Mark Dickinson <dickinsm@gmail.com>
parents: 57485
diff changeset
929 #undef DOUBLE_IS_ODD_INTEGER
ac5fd8909998 Issue #7534: Fix handling of nans, infinities, and negative zero in **
Mark Dickinson <dickinsm@gmail.com>
parents: 57485
diff changeset
930
5396
d1447950fa04 Quickly renamed the last directory.
Guido van Rossum <guido@python.org>
parents: 5197
diff changeset
931 static PyObject *
13454
fcc75a3748f5 ANSI-fication of the sources.
Fred Drake <fdrake@acm.org>
parents: 13447
diff changeset
932 float_neg(PyFloatObject *v)
6
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
933 {
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
934 return PyFloat_FromDouble(-v->ob_fval);
6
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
935 }
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
936
5396
d1447950fa04 Quickly renamed the last directory.
Guido van Rossum <guido@python.org>
parents: 5197
diff changeset
937 static PyObject *
13454
fcc75a3748f5 ANSI-fication of the sources.
Fred Drake <fdrake@acm.org>
parents: 13447
diff changeset
938 float_abs(PyFloatObject *v)
227
7ec6058b539b Added (dummy) divmod and (functional) abs.
Guido van Rossum <guido@python.org>
parents: 145
diff changeset
939 {
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
940 return PyFloat_FromDouble(fabs(v->ob_fval));
6
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
941 }
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
942
239
fda973f2a512 Added nonzero test
Guido van Rossum <guido@python.org>
parents: 227
diff changeset
943 static int
13454
fcc75a3748f5 ANSI-fication of the sources.
Fred Drake <fdrake@acm.org>
parents: 13447
diff changeset
944 float_nonzero(PyFloatObject *v)
239
fda973f2a512 Added nonzero test
Guido van Rossum <guido@python.org>
parents: 227
diff changeset
945 {
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
946 return v->ob_fval != 0.0;
239
fda973f2a512 Added nonzero test
Guido van Rossum <guido@python.org>
parents: 227
diff changeset
947 }
fda973f2a512 Added nonzero test
Guido van Rossum <guido@python.org>
parents: 227
diff changeset
948
1313
6ee380349c84 * Added gmtime/localtime/mktime and SYSV timezone globals to timemodule.c.
Guido van Rossum <guido@python.org>
parents: 1271
diff changeset
949 static int
13454
fcc75a3748f5 ANSI-fication of the sources.
Fred Drake <fdrake@acm.org>
parents: 13447
diff changeset
950 float_coerce(PyObject **pv, PyObject **pw)
955
03de67080c95 * classobject.[ch], {float,long,int}object.c, bltinmodule.c:
Guido van Rossum <guido@python.org>
parents: 795
diff changeset
951 {
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
952 if (PyInt_Check(*pw)) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
953 long x = PyInt_AsLong(*pw);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
954 *pw = PyFloat_FromDouble((double)x);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
955 Py_INCREF(*pv);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
956 return 0;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
957 }
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
958 else if (PyLong_Check(*pw)) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
959 double x = PyLong_AsDouble(*pw);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
960 if (x == -1.0 && PyErr_Occurred())
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
961 return -1;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
962 *pw = PyFloat_FromDouble(x);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
963 Py_INCREF(*pv);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
964 return 0;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
965 }
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
966 else if (PyFloat_Check(*pw)) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
967 Py_INCREF(*pv);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
968 Py_INCREF(*pw);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
969 return 0;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
970 }
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
971 return 1; /* Can't do it */
955
03de67080c95 * classobject.[ch], {float,long,int}object.c, bltinmodule.c:
Guido van Rossum <guido@python.org>
parents: 795
diff changeset
972 }
03de67080c95 * classobject.[ch], {float,long,int}object.c, bltinmodule.c:
Guido van Rossum <guido@python.org>
parents: 795
diff changeset
973
5396
d1447950fa04 Quickly renamed the last directory.
Guido van Rossum <guido@python.org>
parents: 5197
diff changeset
974 static PyObject *
46473
5bc7b20dc04a I finally got the time to update and merge Mark's and my trunk-math branch. The patch is collaborated work of Mark Dickinson and me. It was mostly done a few months ago. The patch fixes a lot of loose ends and edge cases related to operations with NaN, INF, very small values and complex math.
Christian Heimes <christian@cheimes.de>
parents: 46154
diff changeset
975 float_is_integer(PyObject *v)
5bc7b20dc04a I finally got the time to update and merge Mark's and my trunk-math branch. The patch is collaborated work of Mark Dickinson and me. It was mostly done a few months ago. The patch fixes a lot of loose ends and edge cases related to operations with NaN, INF, very small values and complex math.
Christian Heimes <christian@cheimes.de>
parents: 46154
diff changeset
976 {
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
977 double x = PyFloat_AsDouble(v);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
978 PyObject *o;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
979
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
980 if (x == -1.0 && PyErr_Occurred())
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
981 return NULL;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
982 if (!Py_IS_FINITE(x))
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
983 Py_RETURN_FALSE;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
984 errno = 0;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
985 PyFPE_START_PROTECT("is_integer", return NULL)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
986 o = (floor(x) == x) ? Py_True : Py_False;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
987 PyFPE_END_PROTECT(x)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
988 if (errno != 0) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
989 PyErr_SetFromErrno(errno == ERANGE ? PyExc_OverflowError :
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
990 PyExc_ValueError);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
991 return NULL;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
992 }
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
993 Py_INCREF(o);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
994 return o;
46473
5bc7b20dc04a I finally got the time to update and merge Mark's and my trunk-math branch. The patch is collaborated work of Mark Dickinson and me. It was mostly done a few months ago. The patch fixes a lot of loose ends and edge cases related to operations with NaN, INF, very small values and complex math.
Christian Heimes <christian@cheimes.de>
parents: 46154
diff changeset
995 }
5bc7b20dc04a I finally got the time to update and merge Mark's and my trunk-math branch. The patch is collaborated work of Mark Dickinson and me. It was mostly done a few months ago. The patch fixes a lot of loose ends and edge cases related to operations with NaN, INF, very small values and complex math.
Christian Heimes <christian@cheimes.de>
parents: 46154
diff changeset
996
5bc7b20dc04a I finally got the time to update and merge Mark's and my trunk-math branch. The patch is collaborated work of Mark Dickinson and me. It was mostly done a few months ago. The patch fixes a lot of loose ends and edge cases related to operations with NaN, INF, very small values and complex math.
Christian Heimes <christian@cheimes.de>
parents: 46154
diff changeset
997 #if 0
5bc7b20dc04a I finally got the time to update and merge Mark's and my trunk-math branch. The patch is collaborated work of Mark Dickinson and me. It was mostly done a few months ago. The patch fixes a lot of loose ends and edge cases related to operations with NaN, INF, very small values and complex math.
Christian Heimes <christian@cheimes.de>
parents: 46154
diff changeset
998 static PyObject *
5bc7b20dc04a I finally got the time to update and merge Mark's and my trunk-math branch. The patch is collaborated work of Mark Dickinson and me. It was mostly done a few months ago. The patch fixes a lot of loose ends and edge cases related to operations with NaN, INF, very small values and complex math.
Christian Heimes <christian@cheimes.de>
parents: 46154
diff changeset
999 float_is_inf(PyObject *v)
5bc7b20dc04a I finally got the time to update and merge Mark's and my trunk-math branch. The patch is collaborated work of Mark Dickinson and me. It was mostly done a few months ago. The patch fixes a lot of loose ends and edge cases related to operations with NaN, INF, very small values and complex math.
Christian Heimes <christian@cheimes.de>
parents: 46154
diff changeset
1000 {
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1001 double x = PyFloat_AsDouble(v);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1002 if (x == -1.0 && PyErr_Occurred())
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1003 return NULL;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1004 return PyBool_FromLong((long)Py_IS_INFINITY(x));
46473
5bc7b20dc04a I finally got the time to update and merge Mark's and my trunk-math branch. The patch is collaborated work of Mark Dickinson and me. It was mostly done a few months ago. The patch fixes a lot of loose ends and edge cases related to operations with NaN, INF, very small values and complex math.
Christian Heimes <christian@cheimes.de>
parents: 46154
diff changeset
1005 }
5bc7b20dc04a I finally got the time to update and merge Mark's and my trunk-math branch. The patch is collaborated work of Mark Dickinson and me. It was mostly done a few months ago. The patch fixes a lot of loose ends and edge cases related to operations with NaN, INF, very small values and complex math.
Christian Heimes <christian@cheimes.de>
parents: 46154
diff changeset
1006
5bc7b20dc04a I finally got the time to update and merge Mark's and my trunk-math branch. The patch is collaborated work of Mark Dickinson and me. It was mostly done a few months ago. The patch fixes a lot of loose ends and edge cases related to operations with NaN, INF, very small values and complex math.
Christian Heimes <christian@cheimes.de>
parents: 46154
diff changeset
1007 static PyObject *
5bc7b20dc04a I finally got the time to update and merge Mark's and my trunk-math branch. The patch is collaborated work of Mark Dickinson and me. It was mostly done a few months ago. The patch fixes a lot of loose ends and edge cases related to operations with NaN, INF, very small values and complex math.
Christian Heimes <christian@cheimes.de>
parents: 46154
diff changeset
1008 float_is_nan(PyObject *v)
5bc7b20dc04a I finally got the time to update and merge Mark's and my trunk-math branch. The patch is collaborated work of Mark Dickinson and me. It was mostly done a few months ago. The patch fixes a lot of loose ends and edge cases related to operations with NaN, INF, very small values and complex math.
Christian Heimes <christian@cheimes.de>
parents: 46154
diff changeset
1009 {
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1010 double x = PyFloat_AsDouble(v);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1011 if (x == -1.0 && PyErr_Occurred())
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1012 return NULL;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1013 return PyBool_FromLong((long)Py_IS_NAN(x));
46473
5bc7b20dc04a I finally got the time to update and merge Mark's and my trunk-math branch. The patch is collaborated work of Mark Dickinson and me. It was mostly done a few months ago. The patch fixes a lot of loose ends and edge cases related to operations with NaN, INF, very small values and complex math.
Christian Heimes <christian@cheimes.de>
parents: 46154
diff changeset
1014 }
5bc7b20dc04a I finally got the time to update and merge Mark's and my trunk-math branch. The patch is collaborated work of Mark Dickinson and me. It was mostly done a few months ago. The patch fixes a lot of loose ends and edge cases related to operations with NaN, INF, very small values and complex math.
Christian Heimes <christian@cheimes.de>
parents: 46154
diff changeset
1015
5bc7b20dc04a I finally got the time to update and merge Mark's and my trunk-math branch. The patch is collaborated work of Mark Dickinson and me. It was mostly done a few months ago. The patch fixes a lot of loose ends and edge cases related to operations with NaN, INF, very small values and complex math.
Christian Heimes <christian@cheimes.de>
parents: 46154
diff changeset
1016 static PyObject *
5bc7b20dc04a I finally got the time to update and merge Mark's and my trunk-math branch. The patch is collaborated work of Mark Dickinson and me. It was mostly done a few months ago. The patch fixes a lot of loose ends and edge cases related to operations with NaN, INF, very small values and complex math.
Christian Heimes <christian@cheimes.de>
parents: 46154
diff changeset
1017 float_is_finite(PyObject *v)
5bc7b20dc04a I finally got the time to update and merge Mark's and my trunk-math branch. The patch is collaborated work of Mark Dickinson and me. It was mostly done a few months ago. The patch fixes a lot of loose ends and edge cases related to operations with NaN, INF, very small values and complex math.
Christian Heimes <christian@cheimes.de>
parents: 46154
diff changeset
1018 {
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1019 double x = PyFloat_AsDouble(v);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1020 if (x == -1.0 && PyErr_Occurred())
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1021 return NULL;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1022 return PyBool_FromLong((long)Py_IS_FINITE(x));
46473
5bc7b20dc04a I finally got the time to update and merge Mark's and my trunk-math branch. The patch is collaborated work of Mark Dickinson and me. It was mostly done a few months ago. The patch fixes a lot of loose ends and edge cases related to operations with NaN, INF, very small values and complex math.
Christian Heimes <christian@cheimes.de>
parents: 46154
diff changeset
1023 }
5bc7b20dc04a I finally got the time to update and merge Mark's and my trunk-math branch. The patch is collaborated work of Mark Dickinson and me. It was mostly done a few months ago. The patch fixes a lot of loose ends and edge cases related to operations with NaN, INF, very small values and complex math.
Christian Heimes <christian@cheimes.de>
parents: 46154
diff changeset
1024 #endif
5bc7b20dc04a I finally got the time to update and merge Mark's and my trunk-math branch. The patch is collaborated work of Mark Dickinson and me. It was mostly done a few months ago. The patch fixes a lot of loose ends and edge cases related to operations with NaN, INF, very small values and complex math.
Christian Heimes <christian@cheimes.de>
parents: 46154
diff changeset
1025
5bc7b20dc04a I finally got the time to update and merge Mark's and my trunk-math branch. The patch is collaborated work of Mark Dickinson and me. It was mostly done a few months ago. The patch fixes a lot of loose ends and edge cases related to operations with NaN, INF, very small values and complex math.
Christian Heimes <christian@cheimes.de>
parents: 46154
diff changeset
1026 static PyObject *
44432
4f9723d9ca32 Backport PEP 3141 from the py3k branch to the trunk. This includes r50877 (just
Jeffrey Yasskin <jyasskin@gmail.com>
parents: 44350
diff changeset
1027 float_trunc(PyObject *v)
1049
2ed511171809 Made builtins int(), long(), float(), oct() and hex() more generic.
Guido van Rossum <guido@python.org>
parents: 955
diff changeset
1028 {
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1029 double x = PyFloat_AsDouble(v);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1030 double wholepart; /* integral portion of x, rounded toward 0 */
18838
a8575f358b9f SF bug #444510: int() should guarantee truncation.
Tim Peters <tim.peters@gmail.com>
parents: 17707
diff changeset
1031
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1032 (void)modf(x, &wholepart);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1033 /* Try to get out cheap if this fits in a Python int. The attempt
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1034 * to cast to long must be protected, as C doesn't define what
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1035 * happens if the double is too big to fit in a long. Some rare
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1036 * systems raise an exception then (RISCOS was mentioned as one,
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1037 * and someone using a non-default option on Sun also bumped into
68965
e1ebec2446cd Issue #11144: Fix corner cases where float-to-int conversion unnecessarily returned a long.
Mark Dickinson <mdickinson@enthought.com>
parents: 68256
diff changeset
1038 * that). Note that checking for <= LONG_MAX is unsafe: if a long
e1ebec2446cd Issue #11144: Fix corner cases where float-to-int conversion unnecessarily returned a long.
Mark Dickinson <mdickinson@enthought.com>
parents: 68256
diff changeset
1039 * has more bits of precision than a double, casting LONG_MAX to
e1ebec2446cd Issue #11144: Fix corner cases where float-to-int conversion unnecessarily returned a long.
Mark Dickinson <mdickinson@enthought.com>
parents: 68256
diff changeset
1040 * double may yield an approximation, and if that's rounded up,
e1ebec2446cd Issue #11144: Fix corner cases where float-to-int conversion unnecessarily returned a long.
Mark Dickinson <mdickinson@enthought.com>
parents: 68256
diff changeset
1041 * then, e.g., wholepart=LONG_MAX+1 would yield true from the C
e1ebec2446cd Issue #11144: Fix corner cases where float-to-int conversion unnecessarily returned a long.
Mark Dickinson <mdickinson@enthought.com>
parents: 68256
diff changeset
1042 * expression wholepart<=LONG_MAX, despite that wholepart is
e1ebec2446cd Issue #11144: Fix corner cases where float-to-int conversion unnecessarily returned a long.
Mark Dickinson <mdickinson@enthought.com>
parents: 68256
diff changeset
1043 * actually greater than LONG_MAX. However, assuming a two's complement
e1ebec2446cd Issue #11144: Fix corner cases where float-to-int conversion unnecessarily returned a long.
Mark Dickinson <mdickinson@enthought.com>
parents: 68256
diff changeset
1044 * machine with no trap representation, LONG_MIN will be a power of 2 (and
e1ebec2446cd Issue #11144: Fix corner cases where float-to-int conversion unnecessarily returned a long.
Mark Dickinson <mdickinson@enthought.com>
parents: 68256
diff changeset
1045 * hence exactly representable as a double), and LONG_MAX = -1-LONG_MIN, so
e1ebec2446cd Issue #11144: Fix corner cases where float-to-int conversion unnecessarily returned a long.
Mark Dickinson <mdickinson@enthought.com>
parents: 68256
diff changeset
1046 * the comparisons with (double)LONG_MIN below should be safe.
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1047 */
68965
e1ebec2446cd Issue #11144: Fix corner cases where float-to-int conversion unnecessarily returned a long.
Mark Dickinson <mdickinson@enthought.com>
parents: 68256
diff changeset
1048 if ((double)LONG_MIN <= wholepart && wholepart < -(double)LONG_MIN) {
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1049 const long aslong = (long)wholepart;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1050 return PyInt_FromLong(aslong);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1051 }
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1052 return PyLong_FromDouble(wholepart);
1049
2ed511171809 Made builtins int(), long(), float(), oct() and hex() more generic.
Guido van Rossum <guido@python.org>
parents: 955
diff changeset
1053 }
2ed511171809 Made builtins int(), long(), float(), oct() and hex() more generic.
Guido van Rossum <guido@python.org>
parents: 955
diff changeset
1054
5396
d1447950fa04 Quickly renamed the last directory.
Guido van Rossum <guido@python.org>
parents: 5197
diff changeset
1055 static PyObject *
49104
974040c8f369 #3777: long(4.2) returned an int, and broke backward compatibility.
Amaury Forgeot d'Arc <amauryfa@gmail.com>
parents: 48818
diff changeset
1056 float_long(PyObject *v)
974040c8f369 #3777: long(4.2) returned an int, and broke backward compatibility.
Amaury Forgeot d'Arc <amauryfa@gmail.com>
parents: 48818
diff changeset
1057 {
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1058 double x = PyFloat_AsDouble(v);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1059 return PyLong_FromDouble(x);
49104
974040c8f369 #3777: long(4.2) returned an int, and broke backward compatibility.
Amaury Forgeot d'Arc <amauryfa@gmail.com>
parents: 48818
diff changeset
1060 }
974040c8f369 #3777: long(4.2) returned an int, and broke backward compatibility.
Amaury Forgeot d'Arc <amauryfa@gmail.com>
parents: 48818
diff changeset
1061
57324
92e06cdbeab9 Issue #7117, continued: Change round implementation to use the correctly-rounded
Mark Dickinson <dickinsm@gmail.com>
parents: 56766
diff changeset
1062 /* _Py_double_round: rounds a finite nonzero double to the closest multiple of
92e06cdbeab9 Issue #7117, continued: Change round implementation to use the correctly-rounded
Mark Dickinson <dickinsm@gmail.com>
parents: 56766
diff changeset
1063 10**-ndigits; here ndigits is within reasonable bounds (typically, -308 <=
92e06cdbeab9 Issue #7117, continued: Change round implementation to use the correctly-rounded
Mark Dickinson <dickinsm@gmail.com>
parents: 56766
diff changeset
1064 ndigits <= 323). Returns a Python float, or sets a Python error and
92e06cdbeab9 Issue #7117, continued: Change round implementation to use the correctly-rounded
Mark Dickinson <dickinsm@gmail.com>
parents: 56766
diff changeset
1065 returns NULL on failure (OverflowError and memory errors are possible). */
92e06cdbeab9 Issue #7117, continued: Change round implementation to use the correctly-rounded
Mark Dickinson <dickinsm@gmail.com>
parents: 56766
diff changeset
1066
92e06cdbeab9 Issue #7117, continued: Change round implementation to use the correctly-rounded
Mark Dickinson <dickinsm@gmail.com>
parents: 56766
diff changeset
1067 #ifndef PY_NO_SHORT_FLOAT_REPR
92e06cdbeab9 Issue #7117, continued: Change round implementation to use the correctly-rounded
Mark Dickinson <dickinsm@gmail.com>
parents: 56766
diff changeset
1068 /* version of _Py_double_round that uses the correctly-rounded string<->double
92e06cdbeab9 Issue #7117, continued: Change round implementation to use the correctly-rounded
Mark Dickinson <dickinsm@gmail.com>
parents: 56766
diff changeset
1069 conversions from Python/dtoa.c */
92e06cdbeab9 Issue #7117, continued: Change round implementation to use the correctly-rounded
Mark Dickinson <dickinsm@gmail.com>
parents: 56766
diff changeset
1070
92e06cdbeab9 Issue #7117, continued: Change round implementation to use the correctly-rounded
Mark Dickinson <dickinsm@gmail.com>
parents: 56766
diff changeset
1071 /* FIVE_POW_LIMIT is the largest k such that 5**k is exactly representable as
92e06cdbeab9 Issue #7117, continued: Change round implementation to use the correctly-rounded
Mark Dickinson <dickinsm@gmail.com>
parents: 56766
diff changeset
1072 a double. Since we're using the code in Python/dtoa.c, it should be safe
92e06cdbeab9 Issue #7117, continued: Change round implementation to use the correctly-rounded
Mark Dickinson <dickinsm@gmail.com>
parents: 56766
diff changeset
1073 to assume that C doubles are IEEE 754 binary64 format. To be on the safe
92e06cdbeab9 Issue #7117, continued: Change round implementation to use the correctly-rounded
Mark Dickinson <dickinsm@gmail.com>
parents: 56766
diff changeset
1074 side, we check this. */
92e06cdbeab9 Issue #7117, continued: Change round implementation to use the correctly-rounded
Mark Dickinson <dickinsm@gmail.com>
parents: 56766
diff changeset
1075 #if DBL_MANT_DIG == 53
92e06cdbeab9 Issue #7117, continued: Change round implementation to use the correctly-rounded
Mark Dickinson <dickinsm@gmail.com>
parents: 56766
diff changeset
1076 #define FIVE_POW_LIMIT 22
92e06cdbeab9 Issue #7117, continued: Change round implementation to use the correctly-rounded
Mark Dickinson <dickinsm@gmail.com>
parents: 56766
diff changeset
1077 #else
92e06cdbeab9 Issue #7117, continued: Change round implementation to use the correctly-rounded
Mark Dickinson <dickinsm@gmail.com>
parents: 56766
diff changeset
1078 #error "C doubles do not appear to be IEEE 754 binary64 format"
92e06cdbeab9 Issue #7117, continued: Change round implementation to use the correctly-rounded
Mark Dickinson <dickinsm@gmail.com>
parents: 56766
diff changeset
1079 #endif
92e06cdbeab9 Issue #7117, continued: Change round implementation to use the correctly-rounded
Mark Dickinson <dickinsm@gmail.com>
parents: 56766
diff changeset
1080
92e06cdbeab9 Issue #7117, continued: Change round implementation to use the correctly-rounded
Mark Dickinson <dickinsm@gmail.com>
parents: 56766
diff changeset
1081 PyObject *
92e06cdbeab9 Issue #7117, continued: Change round implementation to use the correctly-rounded
Mark Dickinson <dickinsm@gmail.com>
parents: 56766
diff changeset
1082 _Py_double_round(double x, int ndigits) {
92e06cdbeab9 Issue #7117, continued: Change round implementation to use the correctly-rounded
Mark Dickinson <dickinsm@gmail.com>
parents: 56766
diff changeset
1083
61463
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Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1084 double rounded, m;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1085 Py_ssize_t buflen, mybuflen=100;
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1086 char *buf, *buf_end, shortbuf[100], *mybuf=shortbuf;
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1087 int decpt, sign, val, halfway_case;
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1088 PyObject *result = NULL;
57324
92e06cdbeab9 Issue #7117, continued: Change round implementation to use the correctly-rounded
Mark Dickinson <dickinsm@gmail.com>
parents: 56766
diff changeset
1089
61463
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Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1090 /* The basic idea is very simple: convert and round the double to a
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1091 decimal string using _Py_dg_dtoa, then convert that decimal string
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Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1092 back to a double with _Py_dg_strtod. There's one minor difficulty:
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1093 Python 2.x expects round to do round-half-away-from-zero, while
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1094 _Py_dg_dtoa does round-half-to-even. So we need some way to detect
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1095 and correct the halfway cases.
57324
92e06cdbeab9 Issue #7117, continued: Change round implementation to use the correctly-rounded
Mark Dickinson <dickinsm@gmail.com>
parents: 56766
diff changeset
1096
61463
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Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1097 Detection: a halfway value has the form k * 0.5 * 10**-ndigits for
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Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1098 some odd integer k. Or in other words, a rational number x is
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1099 exactly halfway between two multiples of 10**-ndigits if its
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1100 2-valuation is exactly -ndigits-1 and its 5-valuation is at least
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1101 -ndigits. For ndigits >= 0 the latter condition is automatically
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Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1102 satisfied for a binary float x, since any such float has
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1103 nonnegative 5-valuation. For 0 > ndigits >= -22, x needs to be an
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Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1104 integral multiple of 5**-ndigits; we can check this using fmod.
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Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1105 For -22 > ndigits, there are no halfway cases: 5**23 takes 54 bits
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Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1106 to represent exactly, so any odd multiple of 0.5 * 10**n for n >=
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1107 23 takes at least 54 bits of precision to represent exactly.
57324
92e06cdbeab9 Issue #7117, continued: Change round implementation to use the correctly-rounded
Mark Dickinson <dickinsm@gmail.com>
parents: 56766
diff changeset
1108
61463
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Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1109 Correction: a simple strategy for dealing with halfway cases is to
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1110 (for the halfway cases only) call _Py_dg_dtoa with an argument of
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Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1111 ndigits+1 instead of ndigits (thus doing an exact conversion to
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1112 decimal), round the resulting string manually, and then convert
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1113 back using _Py_dg_strtod.
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1114 */
57324
92e06cdbeab9 Issue #7117, continued: Change round implementation to use the correctly-rounded
Mark Dickinson <dickinsm@gmail.com>
parents: 56766
diff changeset
1115
61463
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Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1116 /* nans, infinities and zeros should have already been dealt
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Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1117 with by the caller (in this case, builtin_round) */
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Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1118 assert(Py_IS_FINITE(x) && x != 0.0);
57324
92e06cdbeab9 Issue #7117, continued: Change round implementation to use the correctly-rounded
Mark Dickinson <dickinsm@gmail.com>
parents: 56766
diff changeset
1119
61463
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Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1120 /* find 2-valuation val of x */
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Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1121 m = frexp(x, &val);
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Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1122 while (m != floor(m)) {
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Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1123 m *= 2.0;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1124 val--;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1125 }
57324
92e06cdbeab9 Issue #7117, continued: Change round implementation to use the correctly-rounded
Mark Dickinson <dickinsm@gmail.com>
parents: 56766
diff changeset
1126
61463
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Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1127 /* determine whether this is a halfway case */
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Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1128 if (val == -ndigits-1) {
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Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1129 if (ndigits >= 0)
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Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1130 halfway_case = 1;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1131 else if (ndigits >= -FIVE_POW_LIMIT) {
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Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1132 double five_pow = 1.0;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1133 int i;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1134 for (i=0; i < -ndigits; i++)
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Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1135 five_pow *= 5.0;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1136 halfway_case = fmod(x, five_pow) == 0.0;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1137 }
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Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1138 else
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Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1139 halfway_case = 0;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1140 }
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Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1141 else
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Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1142 halfway_case = 0;
57324
92e06cdbeab9 Issue #7117, continued: Change round implementation to use the correctly-rounded
Mark Dickinson <dickinsm@gmail.com>
parents: 56766
diff changeset
1143
61463
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Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1144 /* round to a decimal string; use an extra place for halfway case */
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Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1145 buf = _Py_dg_dtoa(x, 3, ndigits+halfway_case, &decpt, &sign, &buf_end);
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Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1146 if (buf == NULL) {
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Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1147 PyErr_NoMemory();
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Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1148 return NULL;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1149 }
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Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1150 buflen = buf_end - buf;
57324
92e06cdbeab9 Issue #7117, continued: Change round implementation to use the correctly-rounded
Mark Dickinson <dickinsm@gmail.com>
parents: 56766
diff changeset
1151
61463
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Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1152 /* in halfway case, do the round-half-away-from-zero manually */
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Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1153 if (halfway_case) {
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Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1154 int i, carry;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1155 /* sanity check: _Py_dg_dtoa should not have stripped
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Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1156 any zeros from the result: there should be exactly
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Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1157 ndigits+1 places following the decimal point, and
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Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1158 the last digit in the buffer should be a '5'.*/
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Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1159 assert(buflen - decpt == ndigits+1);
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1160 assert(buf[buflen-1] == '5');
57324
92e06cdbeab9 Issue #7117, continued: Change round implementation to use the correctly-rounded
Mark Dickinson <dickinsm@gmail.com>
parents: 56766
diff changeset
1161
61463
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Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1162 /* increment and shift right at the same time. */
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Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1163 decpt += 1;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1164 carry = 1;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1165 for (i=buflen-1; i-- > 0;) {
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Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1166 carry += buf[i] - '0';
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Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1167 buf[i+1] = carry % 10 + '0';
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Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1168 carry /= 10;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1169 }
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Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1170 buf[0] = carry + '0';
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1171 }
57324
92e06cdbeab9 Issue #7117, continued: Change round implementation to use the correctly-rounded
Mark Dickinson <dickinsm@gmail.com>
parents: 56766
diff changeset
1172
61463
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1173 /* Get new buffer if shortbuf is too small. Space needed <= buf_end -
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1174 buf + 8: (1 extra for '0', 1 for sign, 5 for exp, 1 for '\0'). */
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1175 if (buflen + 8 > mybuflen) {
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1176 mybuflen = buflen+8;
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1177 mybuf = (char *)PyMem_Malloc(mybuflen);
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1178 if (mybuf == NULL) {
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1179 PyErr_NoMemory();
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1180 goto exit;
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1181 }
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1182 }
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1183 /* copy buf to mybuf, adding exponent, sign and leading 0 */
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1184 PyOS_snprintf(mybuf, mybuflen, "%s0%se%d", (sign ? "-" : ""),
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1185 buf, decpt - (int)buflen);
57324
92e06cdbeab9 Issue #7117, continued: Change round implementation to use the correctly-rounded
Mark Dickinson <dickinsm@gmail.com>
parents: 56766
diff changeset
1186
61463
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1187 /* and convert the resulting string back to a double */
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1188 errno = 0;
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1189 rounded = _Py_dg_strtod(mybuf, NULL);
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1190 if (errno == ERANGE && fabs(rounded) >= 1.)
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1191 PyErr_SetString(PyExc_OverflowError,
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1192 "rounded value too large to represent");
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1193 else
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1194 result = PyFloat_FromDouble(rounded);
57324
92e06cdbeab9 Issue #7117, continued: Change round implementation to use the correctly-rounded
Mark Dickinson <dickinsm@gmail.com>
parents: 56766
diff changeset
1195
61463
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1196 /* done computing value; now clean up */
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1197 if (mybuf != shortbuf)
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1198 PyMem_Free(mybuf);
57324
92e06cdbeab9 Issue #7117, continued: Change round implementation to use the correctly-rounded
Mark Dickinson <dickinsm@gmail.com>
parents: 56766
diff changeset
1199 exit:
61463
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1200 _Py_dg_freedtoa(buf);
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1201 return result;
57324
92e06cdbeab9 Issue #7117, continued: Change round implementation to use the correctly-rounded
Mark Dickinson <dickinsm@gmail.com>
parents: 56766
diff changeset
1202 }
92e06cdbeab9 Issue #7117, continued: Change round implementation to use the correctly-rounded
Mark Dickinson <dickinsm@gmail.com>
parents: 56766
diff changeset
1203
92e06cdbeab9 Issue #7117, continued: Change round implementation to use the correctly-rounded
Mark Dickinson <dickinsm@gmail.com>
parents: 56766
diff changeset
1204 #undef FIVE_POW_LIMIT
92e06cdbeab9 Issue #7117, continued: Change round implementation to use the correctly-rounded
Mark Dickinson <dickinsm@gmail.com>
parents: 56766
diff changeset
1205
92e06cdbeab9 Issue #7117, continued: Change round implementation to use the correctly-rounded
Mark Dickinson <dickinsm@gmail.com>
parents: 56766
diff changeset
1206 #else /* PY_NO_SHORT_FLOAT_REPR */
92e06cdbeab9 Issue #7117, continued: Change round implementation to use the correctly-rounded
Mark Dickinson <dickinsm@gmail.com>
parents: 56766
diff changeset
1207
92e06cdbeab9 Issue #7117, continued: Change round implementation to use the correctly-rounded
Mark Dickinson <dickinsm@gmail.com>
parents: 56766
diff changeset
1208 /* fallback version, to be used when correctly rounded binary<->decimal
92e06cdbeab9 Issue #7117, continued: Change round implementation to use the correctly-rounded
Mark Dickinson <dickinsm@gmail.com>
parents: 56766
diff changeset
1209 conversions aren't available */
92e06cdbeab9 Issue #7117, continued: Change round implementation to use the correctly-rounded
Mark Dickinson <dickinsm@gmail.com>
parents: 56766
diff changeset
1210
92e06cdbeab9 Issue #7117, continued: Change round implementation to use the correctly-rounded
Mark Dickinson <dickinsm@gmail.com>
parents: 56766
diff changeset
1211 PyObject *
92e06cdbeab9 Issue #7117, continued: Change round implementation to use the correctly-rounded
Mark Dickinson <dickinsm@gmail.com>
parents: 56766
diff changeset
1212 _Py_double_round(double x, int ndigits) {
61463
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1213 double pow1, pow2, y, z;
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1214 if (ndigits >= 0) {
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1215 if (ndigits > 22) {
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1216 /* pow1 and pow2 are each safe from overflow, but
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1217 pow1*pow2 ~= pow(10.0, ndigits) might overflow */
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1218 pow1 = pow(10.0, (double)(ndigits-22));
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1219 pow2 = 1e22;
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1220 }
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1221 else {
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1222 pow1 = pow(10.0, (double)ndigits);
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1223 pow2 = 1.0;
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1224 }
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1225 y = (x*pow1)*pow2;
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1226 /* if y overflows, then rounded value is exactly x */
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1227 if (!Py_IS_FINITE(y))
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1228 return PyFloat_FromDouble(x);
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1229 }
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1230 else {
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1231 pow1 = pow(10.0, (double)-ndigits);
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1232 pow2 = 1.0; /* unused; silences a gcc compiler warning */
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1233 y = x / pow1;
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1234 }
57324
92e06cdbeab9 Issue #7117, continued: Change round implementation to use the correctly-rounded
Mark Dickinson <dickinsm@gmail.com>
parents: 56766
diff changeset
1235
61463
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1236 z = round(y);
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1237 if (fabs(y-z) == 0.5)
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1238 /* halfway between two integers; use round-away-from-zero */
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1239 z = y + copysign(0.5, y);
57324
92e06cdbeab9 Issue #7117, continued: Change round implementation to use the correctly-rounded
Mark Dickinson <dickinsm@gmail.com>
parents: 56766
diff changeset
1240
61463
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1241 if (ndigits >= 0)
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1242 z = (z / pow2) / pow1;
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1243 else
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1244 z *= pow1;
57324
92e06cdbeab9 Issue #7117, continued: Change round implementation to use the correctly-rounded
Mark Dickinson <dickinsm@gmail.com>
parents: 56766
diff changeset
1245
61463
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1246 /* if computation resulted in overflow, raise OverflowError */
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1247 if (!Py_IS_FINITE(z)) {
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1248 PyErr_SetString(PyExc_OverflowError,
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1249 "overflow occurred during round");
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1250 return NULL;
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1251 }
57324
92e06cdbeab9 Issue #7117, continued: Change round implementation to use the correctly-rounded
Mark Dickinson <dickinsm@gmail.com>
parents: 56766
diff changeset
1252
61463
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1253 return PyFloat_FromDouble(z);
57324
92e06cdbeab9 Issue #7117, continued: Change round implementation to use the correctly-rounded
Mark Dickinson <dickinsm@gmail.com>
parents: 56766
diff changeset
1254 }
92e06cdbeab9 Issue #7117, continued: Change round implementation to use the correctly-rounded
Mark Dickinson <dickinsm@gmail.com>
parents: 56766
diff changeset
1255
92e06cdbeab9 Issue #7117, continued: Change round implementation to use the correctly-rounded
Mark Dickinson <dickinsm@gmail.com>
parents: 56766
diff changeset
1256 #endif /* PY_NO_SHORT_FLOAT_REPR */
92e06cdbeab9 Issue #7117, continued: Change round implementation to use the correctly-rounded
Mark Dickinson <dickinsm@gmail.com>
parents: 56766
diff changeset
1257
49104
974040c8f369 #3777: long(4.2) returned an int, and broke backward compatibility.
Amaury Forgeot d'Arc <amauryfa@gmail.com>
parents: 48818
diff changeset
1258 static PyObject *
13454
fcc75a3748f5 ANSI-fication of the sources.
Fred Drake <fdrake@acm.org>
parents: 13447
diff changeset
1259 float_float(PyObject *v)
1049
2ed511171809 Made builtins int(), long(), float(), oct() and hex() more generic.
Guido van Rossum <guido@python.org>
parents: 955
diff changeset
1260 {
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1261 if (PyFloat_CheckExact(v))
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1262 Py_INCREF(v);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1263 else
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1264 v = PyFloat_FromDouble(((PyFloatObject *)v)->ob_fval);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1265 return v;
1049
2ed511171809 Made builtins int(), long(), float(), oct() and hex() more generic.
Guido van Rossum <guido@python.org>
parents: 955
diff changeset
1266 }
2ed511171809 Made builtins int(), long(), float(), oct() and hex() more generic.
Guido van Rossum <guido@python.org>
parents: 955
diff changeset
1267
47966
97ba936e8df8 Issue #3008: add instance method float.hex and class method float.fromhex
Mark Dickinson <dickinsm@gmail.com>
parents: 47897
diff changeset
1268 /* turn ASCII hex characters into integer values and vice versa */
97ba936e8df8 Issue #3008: add instance method float.hex and class method float.fromhex
Mark Dickinson <dickinsm@gmail.com>
parents: 47897
diff changeset
1269
97ba936e8df8 Issue #3008: add instance method float.hex and class method float.fromhex
Mark Dickinson <dickinsm@gmail.com>
parents: 47897
diff changeset
1270 static char
97ba936e8df8 Issue #3008: add instance method float.hex and class method float.fromhex
Mark Dickinson <dickinsm@gmail.com>
parents: 47897
diff changeset
1271 char_from_hex(int x)
97ba936e8df8 Issue #3008: add instance method float.hex and class method float.fromhex
Mark Dickinson <dickinsm@gmail.com>
parents: 47897
diff changeset
1272 {
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1273 assert(0 <= x && x < 16);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1274 return "0123456789abcdef"[x];
47966
97ba936e8df8 Issue #3008: add instance method float.hex and class method float.fromhex
Mark Dickinson <dickinsm@gmail.com>
parents: 47897
diff changeset
1275 }
97ba936e8df8 Issue #3008: add instance method float.hex and class method float.fromhex
Mark Dickinson <dickinsm@gmail.com>
parents: 47897
diff changeset
1276
97ba936e8df8 Issue #3008: add instance method float.hex and class method float.fromhex
Mark Dickinson <dickinsm@gmail.com>
parents: 47897
diff changeset
1277 static int
97ba936e8df8 Issue #3008: add instance method float.hex and class method float.fromhex
Mark Dickinson <dickinsm@gmail.com>
parents: 47897
diff changeset
1278 hex_from_char(char c) {
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1279 int x;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1280 switch(c) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1281 case '0':
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1282 x = 0;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1283 break;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1284 case '1':
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1285 x = 1;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1286 break;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1287 case '2':
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1288 x = 2;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1289 break;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1290 case '3':
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1291 x = 3;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1292 break;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1293 case '4':
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1294 x = 4;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1295 break;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1296 case '5':
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1297 x = 5;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1298 break;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1299 case '6':
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1300 x = 6;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1301 break;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1302 case '7':
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1303 x = 7;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1304 break;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1305 case '8':
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1306 x = 8;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1307 break;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1308 case '9':
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1309 x = 9;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1310 break;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1311 case 'a':
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1312 case 'A':
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1313 x = 10;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1314 break;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1315 case 'b':
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1316 case 'B':
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1317 x = 11;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1318 break;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1319 case 'c':
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1320 case 'C':
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1321 x = 12;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1322 break;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1323 case 'd':
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1324 case 'D':
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1325 x = 13;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1326 break;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1327 case 'e':
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1328 case 'E':
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1329 x = 14;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1330 break;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1331 case 'f':
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1332 case 'F':
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1333 x = 15;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1334 break;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1335 default:
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1336 x = -1;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
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parents: 54002
diff changeset
1337 break;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
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parents: 54002
diff changeset
1338 }
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1339 return x;
47966
97ba936e8df8 Issue #3008: add instance method float.hex and class method float.fromhex
Mark Dickinson <dickinsm@gmail.com>
parents: 47897
diff changeset
1340 }
97ba936e8df8 Issue #3008: add instance method float.hex and class method float.fromhex
Mark Dickinson <dickinsm@gmail.com>
parents: 47897
diff changeset
1341
97ba936e8df8 Issue #3008: add instance method float.hex and class method float.fromhex
Mark Dickinson <dickinsm@gmail.com>
parents: 47897
diff changeset
1342 /* convert a float to a hexadecimal string */
97ba936e8df8 Issue #3008: add instance method float.hex and class method float.fromhex
Mark Dickinson <dickinsm@gmail.com>
parents: 47897
diff changeset
1343
97ba936e8df8 Issue #3008: add instance method float.hex and class method float.fromhex
Mark Dickinson <dickinsm@gmail.com>
parents: 47897
diff changeset
1344 /* TOHEX_NBITS is DBL_MANT_DIG rounded up to the next integer
97ba936e8df8 Issue #3008: add instance method float.hex and class method float.fromhex
Mark Dickinson <dickinsm@gmail.com>
parents: 47897
diff changeset
1345 of the form 4k+1. */
97ba936e8df8 Issue #3008: add instance method float.hex and class method float.fromhex
Mark Dickinson <dickinsm@gmail.com>
parents: 47897
diff changeset
1346 #define TOHEX_NBITS DBL_MANT_DIG + 3 - (DBL_MANT_DIG+2)%4
97ba936e8df8 Issue #3008: add instance method float.hex and class method float.fromhex
Mark Dickinson <dickinsm@gmail.com>
parents: 47897
diff changeset
1347
97ba936e8df8 Issue #3008: add instance method float.hex and class method float.fromhex
Mark Dickinson <dickinsm@gmail.com>
parents: 47897
diff changeset
1348 static PyObject *
97ba936e8df8 Issue #3008: add instance method float.hex and class method float.fromhex
Mark Dickinson <dickinsm@gmail.com>
parents: 47897
diff changeset
1349 float_hex(PyObject *v)
97ba936e8df8 Issue #3008: add instance method float.hex and class method float.fromhex
Mark Dickinson <dickinsm@gmail.com>
parents: 47897
diff changeset
1350 {
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1351 double x, m;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1352 int e, shift, i, si, esign;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1353 /* Space for 1+(TOHEX_NBITS-1)/4 digits, a decimal point, and the
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1354 trailing NUL byte. */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1355 char s[(TOHEX_NBITS-1)/4+3];
47966
97ba936e8df8 Issue #3008: add instance method float.hex and class method float.fromhex
Mark Dickinson <dickinsm@gmail.com>
parents: 47897
diff changeset
1356
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1357 CONVERT_TO_DOUBLE(v, x);
47966
97ba936e8df8 Issue #3008: add instance method float.hex and class method float.fromhex
Mark Dickinson <dickinsm@gmail.com>
parents: 47897
diff changeset
1358
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1359 if (Py_IS_NAN(x) || Py_IS_INFINITY(x))
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1360 return float_str((PyFloatObject *)v);
47966
97ba936e8df8 Issue #3008: add instance method float.hex and class method float.fromhex
Mark Dickinson <dickinsm@gmail.com>
parents: 47897
diff changeset
1361
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1362 if (x == 0.0) {
62691
e834c5d3a9a3 Merged revisions 82447 via svnmerge from
Benjamin Peterson <benjamin@python.org>
parents: 61465
diff changeset
1363 if (copysign(1.0, x) == -1.0)
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
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parents: 54002
diff changeset
1364 return PyString_FromString("-0x0.0p+0");
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1365 else
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1366 return PyString_FromString("0x0.0p+0");
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1367 }
47966
97ba936e8df8 Issue #3008: add instance method float.hex and class method float.fromhex
Mark Dickinson <dickinsm@gmail.com>
parents: 47897
diff changeset
1368
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1369 m = frexp(fabs(x), &e);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1370 shift = 1 - MAX(DBL_MIN_EXP - e, 0);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1371 m = ldexp(m, shift);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1372 e -= shift;
47966
97ba936e8df8 Issue #3008: add instance method float.hex and class method float.fromhex
Mark Dickinson <dickinsm@gmail.com>
parents: 47897
diff changeset
1373
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1374 si = 0;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1375 s[si] = char_from_hex((int)m);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
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parents: 54002
diff changeset
1376 si++;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1377 m -= (int)m;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1378 s[si] = '.';
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1379 si++;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1380 for (i=0; i < (TOHEX_NBITS-1)/4; i++) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1381 m *= 16.0;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1382 s[si] = char_from_hex((int)m);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1383 si++;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1384 m -= (int)m;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1385 }
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1386 s[si] = '\0';
47966
97ba936e8df8 Issue #3008: add instance method float.hex and class method float.fromhex
Mark Dickinson <dickinsm@gmail.com>
parents: 47897
diff changeset
1387
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1388 if (e < 0) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1389 esign = (int)'-';
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1390 e = -e;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1391 }
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1392 else
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1393 esign = (int)'+';
47966
97ba936e8df8 Issue #3008: add instance method float.hex and class method float.fromhex
Mark Dickinson <dickinsm@gmail.com>
parents: 47897
diff changeset
1394
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1395 if (x < 0.0)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1396 return PyString_FromFormat("-0x%sp%c%d", s, esign, e);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1397 else
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1398 return PyString_FromFormat("0x%sp%c%d", s, esign, e);
47966
97ba936e8df8 Issue #3008: add instance method float.hex and class method float.fromhex
Mark Dickinson <dickinsm@gmail.com>
parents: 47897
diff changeset
1399 }
97ba936e8df8 Issue #3008: add instance method float.hex and class method float.fromhex
Mark Dickinson <dickinsm@gmail.com>
parents: 47897
diff changeset
1400
97ba936e8df8 Issue #3008: add instance method float.hex and class method float.fromhex
Mark Dickinson <dickinsm@gmail.com>
parents: 47897
diff changeset
1401 PyDoc_STRVAR(float_hex_doc,
97ba936e8df8 Issue #3008: add instance method float.hex and class method float.fromhex
Mark Dickinson <dickinsm@gmail.com>
parents: 47897
diff changeset
1402 "float.hex() -> string\n\
97ba936e8df8 Issue #3008: add instance method float.hex and class method float.fromhex
Mark Dickinson <dickinsm@gmail.com>
parents: 47897
diff changeset
1403 \n\
97ba936e8df8 Issue #3008: add instance method float.hex and class method float.fromhex
Mark Dickinson <dickinsm@gmail.com>
parents: 47897
diff changeset
1404 Return a hexadecimal representation of a floating-point number.\n\
97ba936e8df8 Issue #3008: add instance method float.hex and class method float.fromhex
Mark Dickinson <dickinsm@gmail.com>
parents: 47897
diff changeset
1405 >>> (-0.1).hex()\n\
97ba936e8df8 Issue #3008: add instance method float.hex and class method float.fromhex
Mark Dickinson <dickinsm@gmail.com>
parents: 47897
diff changeset
1406 '-0x1.999999999999ap-4'\n\
97ba936e8df8 Issue #3008: add instance method float.hex and class method float.fromhex
Mark Dickinson <dickinsm@gmail.com>
parents: 47897
diff changeset
1407 >>> 3.14159.hex()\n\
97ba936e8df8 Issue #3008: add instance method float.hex and class method float.fromhex
Mark Dickinson <dickinsm@gmail.com>
parents: 47897
diff changeset
1408 '0x1.921f9f01b866ep+1'");
97ba936e8df8 Issue #3008: add instance method float.hex and class method float.fromhex
Mark Dickinson <dickinsm@gmail.com>
parents: 47897
diff changeset
1409
54000
119f4232af46 Issue #5981: Fix some float.fromhex bugs related to inf and nan handling.
Mark Dickinson <dickinsm@gmail.com>
parents: 53802
diff changeset
1410 /* Case-insensitive locale-independent string match used for nan and inf
119f4232af46 Issue #5981: Fix some float.fromhex bugs related to inf and nan handling.
Mark Dickinson <dickinsm@gmail.com>
parents: 53802
diff changeset
1411 detection. t should be lower-case and null-terminated. Return a nonzero
119f4232af46 Issue #5981: Fix some float.fromhex bugs related to inf and nan handling.
Mark Dickinson <dickinsm@gmail.com>
parents: 53802
diff changeset
1412 result if the first strlen(t) characters of s match t and 0 otherwise. */
54002
35c6d407d3c9 Merged revisions 72564 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
parents: 53162
diff changeset
1413
35c6d407d3c9 Merged revisions 72564 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
parents: 53162
diff changeset
1414 static int
35c6d407d3c9 Merged revisions 72564 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
parents: 53162
diff changeset
1415 case_insensitive_match(const char *s, const char *t)
35c6d407d3c9 Merged revisions 72564 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
parents: 53162
diff changeset
1416 {
61463
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1417 while(*t && Py_TOLOWER(*s) == *t) {
61465
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1418 s++;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1419 t++;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1420 }
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1421 return *t ? 0 : 1;
54002
35c6d407d3c9 Merged revisions 72564 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
parents: 53162
diff changeset
1422 }
35c6d407d3c9 Merged revisions 72564 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
parents: 53162
diff changeset
1423
47966
97ba936e8df8 Issue #3008: add instance method float.hex and class method float.fromhex
Mark Dickinson <dickinsm@gmail.com>
parents: 47897
diff changeset
1424 /* Convert a hexadecimal string to a float. */
97ba936e8df8 Issue #3008: add instance method float.hex and class method float.fromhex
Mark Dickinson <dickinsm@gmail.com>
parents: 47897
diff changeset
1425
97ba936e8df8 Issue #3008: add instance method float.hex and class method float.fromhex
Mark Dickinson <dickinsm@gmail.com>
parents: 47897
diff changeset
1426 static PyObject *
97ba936e8df8 Issue #3008: add instance method float.hex and class method float.fromhex
Mark Dickinson <dickinsm@gmail.com>
parents: 47897
diff changeset
1427 float_fromhex(PyObject *cls, PyObject *arg)
97ba936e8df8 Issue #3008: add instance method float.hex and class method float.fromhex
Mark Dickinson <dickinsm@gmail.com>
parents: 47897
diff changeset
1428 {
61465
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parents: 54002
diff changeset
1429 PyObject *result_as_float, *result;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1430 double x;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1431 long exp, top_exp, lsb, key_digit;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
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parents: 54002
diff changeset
1432 char *s, *coeff_start, *s_store, *coeff_end, *exp_start, *s_end;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
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parents: 54002
diff changeset
1433 int half_eps, digit, round_up, sign=1;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1434 Py_ssize_t length, ndigits, fdigits, i;
47966
97ba936e8df8 Issue #3008: add instance method float.hex and class method float.fromhex
Mark Dickinson <dickinsm@gmail.com>
parents: 47897
diff changeset
1435
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1436 /*
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1437 * For the sake of simplicity and correctness, we impose an artificial
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1438 * limit on ndigits, the total number of hex digits in the coefficient
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1439 * The limit is chosen to ensure that, writing exp for the exponent,
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1440 *
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1441 * (1) if exp > LONG_MAX/2 then the value of the hex string is
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1442 * guaranteed to overflow (provided it's nonzero)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1443 *
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1444 * (2) if exp < LONG_MIN/2 then the value of the hex string is
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1445 * guaranteed to underflow to 0.
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1446 *
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1447 * (3) if LONG_MIN/2 <= exp <= LONG_MAX/2 then there's no danger of
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1448 * overflow in the calculation of exp and top_exp below.
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1449 *
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1450 * More specifically, ndigits is assumed to satisfy the following
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1451 * inequalities:
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1452 *
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1453 * 4*ndigits <= DBL_MIN_EXP - DBL_MANT_DIG - LONG_MIN/2
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1454 * 4*ndigits <= LONG_MAX/2 + 1 - DBL_MAX_EXP
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1455 *
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1456 * If either of these inequalities is not satisfied, a ValueError is
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1457 * raised. Otherwise, write x for the value of the hex string, and
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1458 * assume x is nonzero. Then
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1459 *
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1460 * 2**(exp-4*ndigits) <= |x| < 2**(exp+4*ndigits).
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1461 *
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1462 * Now if exp > LONG_MAX/2 then:
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1463 *
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1464 * exp - 4*ndigits >= LONG_MAX/2 + 1 - (LONG_MAX/2 + 1 - DBL_MAX_EXP)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1465 * = DBL_MAX_EXP
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1466 *
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1467 * so |x| >= 2**DBL_MAX_EXP, which is too large to be stored in C
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1468 * double, so overflows. If exp < LONG_MIN/2, then
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1469 *
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1470 * exp + 4*ndigits <= LONG_MIN/2 - 1 + (
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1471 * DBL_MIN_EXP - DBL_MANT_DIG - LONG_MIN/2)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1472 * = DBL_MIN_EXP - DBL_MANT_DIG - 1
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1473 *
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1474 * and so |x| < 2**(DBL_MIN_EXP-DBL_MANT_DIG-1), hence underflows to 0
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1475 * when converted to a C double.
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1476 *
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1477 * It's easy to show that if LONG_MIN/2 <= exp <= LONG_MAX/2 then both
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1478 * exp+4*ndigits and exp-4*ndigits are within the range of a long.
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1479 */
47966
97ba936e8df8 Issue #3008: add instance method float.hex and class method float.fromhex
Mark Dickinson <dickinsm@gmail.com>
parents: 47897
diff changeset
1480
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1481 if (PyString_AsStringAndSize(arg, &s, &length))
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1482 return NULL;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1483 s_end = s + length;
47966
97ba936e8df8 Issue #3008: add instance method float.hex and class method float.fromhex
Mark Dickinson <dickinsm@gmail.com>
parents: 47897
diff changeset
1484
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1485 /********************
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1486 * Parse the string *
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1487 ********************/
47966
97ba936e8df8 Issue #3008: add instance method float.hex and class method float.fromhex
Mark Dickinson <dickinsm@gmail.com>
parents: 47897
diff changeset
1488
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1489 /* leading whitespace and optional sign */
61463
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1490 while (Py_ISSPACE(*s))
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1491 s++;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1492 if (*s == '-') {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1493 s++;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1494 sign = -1;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1495 }
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1496 else if (*s == '+')
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1497 s++;
47966
97ba936e8df8 Issue #3008: add instance method float.hex and class method float.fromhex
Mark Dickinson <dickinsm@gmail.com>
parents: 47897
diff changeset
1498
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1499 /* infinities and nans */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1500 if (*s == 'i' || *s == 'I') {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1501 if (!case_insensitive_match(s+1, "nf"))
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1502 goto parse_error;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1503 s += 3;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1504 x = Py_HUGE_VAL;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1505 if (case_insensitive_match(s, "inity"))
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1506 s += 5;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1507 goto finished;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1508 }
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1509 if (*s == 'n' || *s == 'N') {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1510 if (!case_insensitive_match(s+1, "an"))
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1511 goto parse_error;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1512 s += 3;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1513 x = Py_NAN;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1514 goto finished;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1515 }
47966
97ba936e8df8 Issue #3008: add instance method float.hex and class method float.fromhex
Mark Dickinson <dickinsm@gmail.com>
parents: 47897
diff changeset
1516
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1517 /* [0x] */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1518 s_store = s;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1519 if (*s == '0') {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1520 s++;
61463
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1521 if (*s == 'x' || *s == 'X')
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1522 s++;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1523 else
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1524 s = s_store;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1525 }
47966
97ba936e8df8 Issue #3008: add instance method float.hex and class method float.fromhex
Mark Dickinson <dickinsm@gmail.com>
parents: 47897
diff changeset
1526
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1527 /* coefficient: <integer> [. <fraction>] */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1528 coeff_start = s;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1529 while (hex_from_char(*s) >= 0)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1530 s++;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1531 s_store = s;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1532 if (*s == '.') {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1533 s++;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1534 while (hex_from_char(*s) >= 0)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1535 s++;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1536 coeff_end = s-1;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1537 }
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1538 else
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1539 coeff_end = s;
47966
97ba936e8df8 Issue #3008: add instance method float.hex and class method float.fromhex
Mark Dickinson <dickinsm@gmail.com>
parents: 47897
diff changeset
1540
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1541 /* ndigits = total # of hex digits; fdigits = # after point */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1542 ndigits = coeff_end - coeff_start;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1543 fdigits = coeff_end - s_store;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1544 if (ndigits == 0)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1545 goto parse_error;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1546 if (ndigits > MIN(DBL_MIN_EXP - DBL_MANT_DIG - LONG_MIN/2,
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1547 LONG_MAX/2 + 1 - DBL_MAX_EXP)/4)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1548 goto insane_length_error;
47966
97ba936e8df8 Issue #3008: add instance method float.hex and class method float.fromhex
Mark Dickinson <dickinsm@gmail.com>
parents: 47897
diff changeset
1549
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1550 /* [p <exponent>] */
61463
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1551 if (*s == 'p' || *s == 'P') {
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1552 s++;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1553 exp_start = s;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1554 if (*s == '-' || *s == '+')
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1555 s++;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1556 if (!('0' <= *s && *s <= '9'))
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1557 goto parse_error;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1558 s++;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1559 while ('0' <= *s && *s <= '9')
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1560 s++;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1561 exp = strtol(exp_start, NULL, 10);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1562 }
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1563 else
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1564 exp = 0;
47966
97ba936e8df8 Issue #3008: add instance method float.hex and class method float.fromhex
Mark Dickinson <dickinsm@gmail.com>
parents: 47897
diff changeset
1565
97ba936e8df8 Issue #3008: add instance method float.hex and class method float.fromhex
Mark Dickinson <dickinsm@gmail.com>
parents: 47897
diff changeset
1566 /* for 0 <= j < ndigits, HEX_DIGIT(j) gives the jth most significant digit */
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1567 #define HEX_DIGIT(j) hex_from_char(*((j) < fdigits ? \
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1568 coeff_end-(j) : \
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1569 coeff_end-1-(j)))
47966
97ba936e8df8 Issue #3008: add instance method float.hex and class method float.fromhex
Mark Dickinson <dickinsm@gmail.com>
parents: 47897
diff changeset
1570
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1571 /*******************************************
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1572 * Compute rounded value of the hex string *
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1573 *******************************************/
47966
97ba936e8df8 Issue #3008: add instance method float.hex and class method float.fromhex
Mark Dickinson <dickinsm@gmail.com>
parents: 47897
diff changeset
1574
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1575 /* Discard leading zeros, and catch extreme overflow and underflow */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1576 while (ndigits > 0 && HEX_DIGIT(ndigits-1) == 0)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1577 ndigits--;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1578 if (ndigits == 0 || exp < LONG_MIN/2) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1579 x = 0.0;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1580 goto finished;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1581 }
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1582 if (exp > LONG_MAX/2)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1583 goto overflow_error;
47966
97ba936e8df8 Issue #3008: add instance method float.hex and class method float.fromhex
Mark Dickinson <dickinsm@gmail.com>
parents: 47897
diff changeset
1584
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1585 /* Adjust exponent for fractional part. */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1586 exp = exp - 4*((long)fdigits);
47966
97ba936e8df8 Issue #3008: add instance method float.hex and class method float.fromhex
Mark Dickinson <dickinsm@gmail.com>
parents: 47897
diff changeset
1587
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1588 /* top_exp = 1 more than exponent of most sig. bit of coefficient */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1589 top_exp = exp + 4*((long)ndigits - 1);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1590 for (digit = HEX_DIGIT(ndigits-1); digit != 0; digit /= 2)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1591 top_exp++;
47966
97ba936e8df8 Issue #3008: add instance method float.hex and class method float.fromhex
Mark Dickinson <dickinsm@gmail.com>
parents: 47897
diff changeset
1592
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1593 /* catch almost all nonextreme cases of overflow and underflow here */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1594 if (top_exp < DBL_MIN_EXP - DBL_MANT_DIG) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1595 x = 0.0;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1596 goto finished;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1597 }
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1598 if (top_exp > DBL_MAX_EXP)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1599 goto overflow_error;
47966
97ba936e8df8 Issue #3008: add instance method float.hex and class method float.fromhex
Mark Dickinson <dickinsm@gmail.com>
parents: 47897
diff changeset
1600
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1601 /* lsb = exponent of least significant bit of the *rounded* value.
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1602 This is top_exp - DBL_MANT_DIG unless result is subnormal. */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1603 lsb = MAX(top_exp, (long)DBL_MIN_EXP) - DBL_MANT_DIG;
47966
97ba936e8df8 Issue #3008: add instance method float.hex and class method float.fromhex
Mark Dickinson <dickinsm@gmail.com>
parents: 47897
diff changeset
1604
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1605 x = 0.0;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1606 if (exp >= lsb) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1607 /* no rounding required */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1608 for (i = ndigits-1; i >= 0; i--)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1609 x = 16.0*x + HEX_DIGIT(i);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1610 x = ldexp(x, (int)(exp));
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1611 goto finished;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1612 }
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1613 /* rounding required. key_digit is the index of the hex digit
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1614 containing the first bit to be rounded away. */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1615 half_eps = 1 << (int)((lsb - exp - 1) % 4);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1616 key_digit = (lsb - exp - 1) / 4;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1617 for (i = ndigits-1; i > key_digit; i--)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1618 x = 16.0*x + HEX_DIGIT(i);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1619 digit = HEX_DIGIT(key_digit);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1620 x = 16.0*x + (double)(digit & (16-2*half_eps));
47966
97ba936e8df8 Issue #3008: add instance method float.hex and class method float.fromhex
Mark Dickinson <dickinsm@gmail.com>
parents: 47897
diff changeset
1621
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1622 /* round-half-even: round up if bit lsb-1 is 1 and at least one of
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1623 bits lsb, lsb-2, lsb-3, lsb-4, ... is 1. */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1624 if ((digit & half_eps) != 0) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1625 round_up = 0;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1626 if ((digit & (3*half_eps-1)) != 0 ||
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1627 (half_eps == 8 && (HEX_DIGIT(key_digit+1) & 1) != 0))
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1628 round_up = 1;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1629 else
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1630 for (i = key_digit-1; i >= 0; i--)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1631 if (HEX_DIGIT(i) != 0) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1632 round_up = 1;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1633 break;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1634 }
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1635 if (round_up == 1) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1636 x += 2*half_eps;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1637 if (top_exp == DBL_MAX_EXP &&
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1638 x == ldexp((double)(2*half_eps), DBL_MANT_DIG))
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1639 /* overflow corner case: pre-rounded value <
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1640 2**DBL_MAX_EXP; rounded=2**DBL_MAX_EXP. */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1641 goto overflow_error;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1642 }
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1643 }
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1644 x = ldexp(x, (int)(exp+4*key_digit));
47966
97ba936e8df8 Issue #3008: add instance method float.hex and class method float.fromhex
Mark Dickinson <dickinsm@gmail.com>
parents: 47897
diff changeset
1645
97ba936e8df8 Issue #3008: add instance method float.hex and class method float.fromhex
Mark Dickinson <dickinsm@gmail.com>
parents: 47897
diff changeset
1646 finished:
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1647 /* optional trailing whitespace leading to the end of the string */
61463
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
1648 while (Py_ISSPACE(*s))
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1649 s++;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1650 if (s != s_end)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1651 goto parse_error;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1652 result_as_float = Py_BuildValue("(d)", sign * x);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1653 if (result_as_float == NULL)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1654 return NULL;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1655 result = PyObject_CallObject(cls, result_as_float);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1656 Py_DECREF(result_as_float);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1657 return result;
47966
97ba936e8df8 Issue #3008: add instance method float.hex and class method float.fromhex
Mark Dickinson <dickinsm@gmail.com>
parents: 47897
diff changeset
1658
97ba936e8df8 Issue #3008: add instance method float.hex and class method float.fromhex
Mark Dickinson <dickinsm@gmail.com>
parents: 47897
diff changeset
1659 overflow_error:
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1660 PyErr_SetString(PyExc_OverflowError,
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1661 "hexadecimal value too large to represent as a float");
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1662 return NULL;
47966
97ba936e8df8 Issue #3008: add instance method float.hex and class method float.fromhex
Mark Dickinson <dickinsm@gmail.com>
parents: 47897
diff changeset
1663
97ba936e8df8 Issue #3008: add instance method float.hex and class method float.fromhex
Mark Dickinson <dickinsm@gmail.com>
parents: 47897
diff changeset
1664 parse_error:
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1665 PyErr_SetString(PyExc_ValueError,
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1666 "invalid hexadecimal floating-point string");
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1667 return NULL;
47966
97ba936e8df8 Issue #3008: add instance method float.hex and class method float.fromhex
Mark Dickinson <dickinsm@gmail.com>
parents: 47897
diff changeset
1668
97ba936e8df8 Issue #3008: add instance method float.hex and class method float.fromhex
Mark Dickinson <dickinsm@gmail.com>
parents: 47897
diff changeset
1669 insane_length_error:
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1670 PyErr_SetString(PyExc_ValueError,
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1671 "hexadecimal string too long to convert");
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1672 return NULL;
47966
97ba936e8df8 Issue #3008: add instance method float.hex and class method float.fromhex
Mark Dickinson <dickinsm@gmail.com>
parents: 47897
diff changeset
1673 }
97ba936e8df8 Issue #3008: add instance method float.hex and class method float.fromhex
Mark Dickinson <dickinsm@gmail.com>
parents: 47897
diff changeset
1674
97ba936e8df8 Issue #3008: add instance method float.hex and class method float.fromhex
Mark Dickinson <dickinsm@gmail.com>
parents: 47897
diff changeset
1675 PyDoc_STRVAR(float_fromhex_doc,
97ba936e8df8 Issue #3008: add instance method float.hex and class method float.fromhex
Mark Dickinson <dickinsm@gmail.com>
parents: 47897
diff changeset
1676 "float.fromhex(string) -> float\n\
97ba936e8df8 Issue #3008: add instance method float.hex and class method float.fromhex
Mark Dickinson <dickinsm@gmail.com>
parents: 47897
diff changeset
1677 \n\
97ba936e8df8 Issue #3008: add instance method float.hex and class method float.fromhex
Mark Dickinson <dickinsm@gmail.com>
parents: 47897
diff changeset
1678 Create a floating-point number from a hexadecimal string.\n\
97ba936e8df8 Issue #3008: add instance method float.hex and class method float.fromhex
Mark Dickinson <dickinsm@gmail.com>
parents: 47897
diff changeset
1679 >>> float.fromhex('0x1.ffffp10')\n\
97ba936e8df8 Issue #3008: add instance method float.hex and class method float.fromhex
Mark Dickinson <dickinsm@gmail.com>
parents: 47897
diff changeset
1680 2047.984375\n\
97ba936e8df8 Issue #3008: add instance method float.hex and class method float.fromhex
Mark Dickinson <dickinsm@gmail.com>
parents: 47897
diff changeset
1681 >>> float.fromhex('-0x1p-1074')\n\
97ba936e8df8 Issue #3008: add instance method float.hex and class method float.fromhex
Mark Dickinson <dickinsm@gmail.com>
parents: 47897
diff changeset
1682 -4.9406564584124654e-324");
97ba936e8df8 Issue #3008: add instance method float.hex and class method float.fromhex
Mark Dickinson <dickinsm@gmail.com>
parents: 47897
diff changeset
1683
97ba936e8df8 Issue #3008: add instance method float.hex and class method float.fromhex
Mark Dickinson <dickinsm@gmail.com>
parents: 47897
diff changeset
1684
45024
f062dda54894 Moved Rational._binary_float_to_ratio() to float.as_integer_ratio() because
Jeffrey Yasskin <jyasskin@gmail.com>
parents: 44940
diff changeset
1685 static PyObject *
45094
beea73ca2b88 Issue #1996: float.as_integer_ratio() should return fraction in lowest terms.
Raymond Hettinger <python@rcn.com>
parents: 45060
diff changeset
1686 float_as_integer_ratio(PyObject *v, PyObject *unused)
45024
f062dda54894 Moved Rational._binary_float_to_ratio() to float.as_integer_ratio() because
Jeffrey Yasskin <jyasskin@gmail.com>
parents: 44940
diff changeset
1687 {
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1688 double self;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1689 double float_part;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1690 int exponent;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1691 int i;
45094
beea73ca2b88 Issue #1996: float.as_integer_ratio() should return fraction in lowest terms.
Raymond Hettinger <python@rcn.com>
parents: 45060
diff changeset
1692
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1693 PyObject *prev;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1694 PyObject *py_exponent = NULL;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1695 PyObject *numerator = NULL;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1696 PyObject *denominator = NULL;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1697 PyObject *result_pair = NULL;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1698 PyNumberMethods *long_methods = PyLong_Type.tp_as_number;
45024
f062dda54894 Moved Rational._binary_float_to_ratio() to float.as_integer_ratio() because
Jeffrey Yasskin <jyasskin@gmail.com>
parents: 44940
diff changeset
1699
f062dda54894 Moved Rational._binary_float_to_ratio() to float.as_integer_ratio() because
Jeffrey Yasskin <jyasskin@gmail.com>
parents: 44940
diff changeset
1700 #define INPLACE_UPDATE(obj, call) \
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1701 prev = obj; \
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1702 obj = call; \
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1703 Py_DECREF(prev); \
45024
f062dda54894 Moved Rational._binary_float_to_ratio() to float.as_integer_ratio() because
Jeffrey Yasskin <jyasskin@gmail.com>
parents: 44940
diff changeset
1704
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1705 CONVERT_TO_DOUBLE(v, self);
45024
f062dda54894 Moved Rational._binary_float_to_ratio() to float.as_integer_ratio() because
Jeffrey Yasskin <jyasskin@gmail.com>
parents: 44940
diff changeset
1706
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1707 if (Py_IS_INFINITY(self)) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1708 PyErr_SetString(PyExc_OverflowError,
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1709 "Cannot pass infinity to float.as_integer_ratio.");
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1710 return NULL;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1711 }
45024
f062dda54894 Moved Rational._binary_float_to_ratio() to float.as_integer_ratio() because
Jeffrey Yasskin <jyasskin@gmail.com>
parents: 44940
diff changeset
1712 #ifdef Py_NAN
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1713 if (Py_IS_NAN(self)) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1714 PyErr_SetString(PyExc_ValueError,
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1715 "Cannot pass NaN to float.as_integer_ratio.");
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1716 return NULL;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1717 }
45024
f062dda54894 Moved Rational._binary_float_to_ratio() to float.as_integer_ratio() because
Jeffrey Yasskin <jyasskin@gmail.com>
parents: 44940
diff changeset
1718 #endif
f062dda54894 Moved Rational._binary_float_to_ratio() to float.as_integer_ratio() because
Jeffrey Yasskin <jyasskin@gmail.com>
parents: 44940
diff changeset
1719
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1720 PyFPE_START_PROTECT("as_integer_ratio", goto error);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1721 float_part = frexp(self, &exponent); /* self == float_part * 2**exponent exactly */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1722 PyFPE_END_PROTECT(float_part);
45024
f062dda54894 Moved Rational._binary_float_to_ratio() to float.as_integer_ratio() because
Jeffrey Yasskin <jyasskin@gmail.com>
parents: 44940
diff changeset
1723
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1724 for (i=0; i<300 && float_part != floor(float_part) ; i++) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1725 float_part *= 2.0;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1726 exponent--;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1727 }
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1728 /* self == float_part * 2**exponent exactly and float_part is integral.
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1729 If FLT_RADIX != 2, the 300 steps may leave a tiny fractional part
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1730 to be truncated by PyLong_FromDouble(). */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1731
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1732 numerator = PyLong_FromDouble(float_part);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1733 if (numerator == NULL) goto error;
45024
f062dda54894 Moved Rational._binary_float_to_ratio() to float.as_integer_ratio() because
Jeffrey Yasskin <jyasskin@gmail.com>
parents: 44940
diff changeset
1734
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1735 /* fold in 2**exponent */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1736 denominator = PyLong_FromLong(1);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1737 py_exponent = PyLong_FromLong(labs((long)exponent));
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1738 if (py_exponent == NULL) goto error;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1739 INPLACE_UPDATE(py_exponent,
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1740 long_methods->nb_lshift(denominator, py_exponent));
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1741 if (py_exponent == NULL) goto error;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1742 if (exponent > 0) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1743 INPLACE_UPDATE(numerator,
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1744 long_methods->nb_multiply(numerator, py_exponent));
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1745 if (numerator == NULL) goto error;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1746 }
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1747 else {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1748 Py_DECREF(denominator);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1749 denominator = py_exponent;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1750 py_exponent = NULL;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1751 }
45024
f062dda54894 Moved Rational._binary_float_to_ratio() to float.as_integer_ratio() because
Jeffrey Yasskin <jyasskin@gmail.com>
parents: 44940
diff changeset
1752
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1753 /* Returns ints instead of longs where possible */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1754 INPLACE_UPDATE(numerator, PyNumber_Int(numerator));
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1755 if (numerator == NULL) goto error;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1756 INPLACE_UPDATE(denominator, PyNumber_Int(denominator));
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1757 if (denominator == NULL) goto error;
45095
5cb8288360e7 Integer ratio should return ints instead of longs whereever possible.
Raymond Hettinger <python@rcn.com>
parents: 45094
diff changeset
1758
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1759 result_pair = PyTuple_Pack(2, numerator, denominator);
45024
f062dda54894 Moved Rational._binary_float_to_ratio() to float.as_integer_ratio() because
Jeffrey Yasskin <jyasskin@gmail.com>
parents: 44940
diff changeset
1760
f062dda54894 Moved Rational._binary_float_to_ratio() to float.as_integer_ratio() because
Jeffrey Yasskin <jyasskin@gmail.com>
parents: 44940
diff changeset
1761 #undef INPLACE_UPDATE
f062dda54894 Moved Rational._binary_float_to_ratio() to float.as_integer_ratio() because
Jeffrey Yasskin <jyasskin@gmail.com>
parents: 44940
diff changeset
1762 error:
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1763 Py_XDECREF(py_exponent);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1764 Py_XDECREF(denominator);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1765 Py_XDECREF(numerator);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1766 return result_pair;
45024
f062dda54894 Moved Rational._binary_float_to_ratio() to float.as_integer_ratio() because
Jeffrey Yasskin <jyasskin@gmail.com>
parents: 44940
diff changeset
1767 }
f062dda54894 Moved Rational._binary_float_to_ratio() to float.as_integer_ratio() because
Jeffrey Yasskin <jyasskin@gmail.com>
parents: 44940
diff changeset
1768
f062dda54894 Moved Rational._binary_float_to_ratio() to float.as_integer_ratio() because
Jeffrey Yasskin <jyasskin@gmail.com>
parents: 44940
diff changeset
1769 PyDoc_STRVAR(float_as_integer_ratio_doc,
f062dda54894 Moved Rational._binary_float_to_ratio() to float.as_integer_ratio() because
Jeffrey Yasskin <jyasskin@gmail.com>
parents: 44940
diff changeset
1770 "float.as_integer_ratio() -> (int, int)\n"
f062dda54894 Moved Rational._binary_float_to_ratio() to float.as_integer_ratio() because
Jeffrey Yasskin <jyasskin@gmail.com>
parents: 44940
diff changeset
1771 "\n"
45094
beea73ca2b88 Issue #1996: float.as_integer_ratio() should return fraction in lowest terms.
Raymond Hettinger <python@rcn.com>
parents: 45060
diff changeset
1772 "Returns a pair of integers, whose ratio is exactly equal to the original\n"
beea73ca2b88 Issue #1996: float.as_integer_ratio() should return fraction in lowest terms.
Raymond Hettinger <python@rcn.com>
parents: 45060
diff changeset
1773 "float and with a positive denominator.\n"
49431
2e794757bdc8 Merged revisions 66766-66767,66771-66772,66774,66776,66783-66787,66790,66793,66797 via svnmerge from
Benjamin Peterson <benjamin@python.org>
parents: 49266
diff changeset
1774 "Raises OverflowError on infinities and a ValueError on NaNs.\n"
45024
f062dda54894 Moved Rational._binary_float_to_ratio() to float.as_integer_ratio() because
Jeffrey Yasskin <jyasskin@gmail.com>
parents: 44940
diff changeset
1775 "\n"
f062dda54894 Moved Rational._binary_float_to_ratio() to float.as_integer_ratio() because
Jeffrey Yasskin <jyasskin@gmail.com>
parents: 44940
diff changeset
1776 ">>> (10.0).as_integer_ratio()\n"
45094
beea73ca2b88 Issue #1996: float.as_integer_ratio() should return fraction in lowest terms.
Raymond Hettinger <python@rcn.com>
parents: 45060
diff changeset
1777 "(10, 1)\n"
45024
f062dda54894 Moved Rational._binary_float_to_ratio() to float.as_integer_ratio() because
Jeffrey Yasskin <jyasskin@gmail.com>
parents: 44940
diff changeset
1778 ">>> (0.0).as_integer_ratio()\n"
f062dda54894 Moved Rational._binary_float_to_ratio() to float.as_integer_ratio() because
Jeffrey Yasskin <jyasskin@gmail.com>
parents: 44940
diff changeset
1779 "(0, 1)\n"
f062dda54894 Moved Rational._binary_float_to_ratio() to float.as_integer_ratio() because
Jeffrey Yasskin <jyasskin@gmail.com>
parents: 44940
diff changeset
1780 ">>> (-.25).as_integer_ratio()\n"
45094
beea73ca2b88 Issue #1996: float.as_integer_ratio() should return fraction in lowest terms.
Raymond Hettinger <python@rcn.com>
parents: 45060
diff changeset
1781 "(-1, 4)");
45024
f062dda54894 Moved Rational._binary_float_to_ratio() to float.as_integer_ratio() because
Jeffrey Yasskin <jyasskin@gmail.com>
parents: 44940
diff changeset
1782
1049
2ed511171809 Made builtins int(), long(), float(), oct() and hex() more generic.
Guido van Rossum <guido@python.org>
parents: 955
diff changeset
1783
24280
1598a1e473e2 staticforward bites the dust.
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 23832
diff changeset
1784 static PyObject *
19552
6c30d20d27f2 Make int, long and float subclassable.
Guido van Rossum <guido@python.org>
parents: 19457
diff changeset
1785 float_subtype_new(PyTypeObject *type, PyObject *args, PyObject *kwds);
6c30d20d27f2 Make int, long and float subclassable.
Guido van Rossum <guido@python.org>
parents: 19457
diff changeset
1786
18933
09df3254b49d Merge of descr-branch back into trunk.
Tim Peters <tim.peters@gmail.com>
parents: 18838
diff changeset
1787 static PyObject *
09df3254b49d Merge of descr-branch back into trunk.
Tim Peters <tim.peters@gmail.com>
parents: 18838
diff changeset
1788 float_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
09df3254b49d Merge of descr-branch back into trunk.
Tim Peters <tim.peters@gmail.com>
parents: 18838
diff changeset
1789 {
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1790 PyObject *x = Py_False; /* Integer zero */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1791 static char *kwlist[] = {"x", 0};
18933
09df3254b49d Merge of descr-branch back into trunk.
Tim Peters <tim.peters@gmail.com>
parents: 18838
diff changeset
1792
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1793 if (type != &PyFloat_Type)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1794 return float_subtype_new(type, args, kwds); /* Wimp out */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1795 if (!PyArg_ParseTupleAndKeywords(args, kwds, "|O:float", kwlist, &x))
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1796 return NULL;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1797 /* If it's a string, but not a string subclass, use
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1798 PyFloat_FromString. */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1799 if (PyString_CheckExact(x))
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1800 return PyFloat_FromString(x, NULL);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1801 return PyNumber_Float(x);
18933
09df3254b49d Merge of descr-branch back into trunk.
Tim Peters <tim.peters@gmail.com>
parents: 18838
diff changeset
1802 }
09df3254b49d Merge of descr-branch back into trunk.
Tim Peters <tim.peters@gmail.com>
parents: 18838
diff changeset
1803
19552
6c30d20d27f2 Make int, long and float subclassable.
Guido van Rossum <guido@python.org>
parents: 19457
diff changeset
1804 /* Wimpy, slow approach to tp_new calls for subtypes of float:
6c30d20d27f2 Make int, long and float subclassable.
Guido van Rossum <guido@python.org>
parents: 19457
diff changeset
1805 first create a regular float from whatever arguments we got,
6c30d20d27f2 Make int, long and float subclassable.
Guido van Rossum <guido@python.org>
parents: 19457
diff changeset
1806 then allocate a subtype instance and initialize its ob_fval
6c30d20d27f2 Make int, long and float subclassable.
Guido van Rossum <guido@python.org>
parents: 19457
diff changeset
1807 from the regular float. The regular float is then thrown away.
6c30d20d27f2 Make int, long and float subclassable.
Guido van Rossum <guido@python.org>
parents: 19457
diff changeset
1808 */
6c30d20d27f2 Make int, long and float subclassable.
Guido van Rossum <guido@python.org>
parents: 19457
diff changeset
1809 static PyObject *
6c30d20d27f2 Make int, long and float subclassable.
Guido van Rossum <guido@python.org>
parents: 19457
diff changeset
1810 float_subtype_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
6c30d20d27f2 Make int, long and float subclassable.
Guido van Rossum <guido@python.org>
parents: 19457
diff changeset
1811 {
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1812 PyObject *tmp, *newobj;
19552
6c30d20d27f2 Make int, long and float subclassable.
Guido van Rossum <guido@python.org>
parents: 19457
diff changeset
1813
61465
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parents: 54002
diff changeset
1814 assert(PyType_IsSubtype(type, &PyFloat_Type));
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1815 tmp = float_new(&PyFloat_Type, args, kwds);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1816 if (tmp == NULL)
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1817 return NULL;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1818 assert(PyFloat_CheckExact(tmp));
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1819 newobj = type->tp_alloc(type, 0);
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1820 if (newobj == NULL) {
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parents: 54002
diff changeset
1821 Py_DECREF(tmp);
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1822 return NULL;
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parents: 54002
diff changeset
1823 }
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1824 ((PyFloatObject *)newobj)->ob_fval = ((PyFloatObject *)tmp)->ob_fval;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1825 Py_DECREF(tmp);
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1826 return newobj;
19552
6c30d20d27f2 Make int, long and float subclassable.
Guido van Rossum <guido@python.org>
parents: 19457
diff changeset
1827 }
6c30d20d27f2 Make int, long and float subclassable.
Guido van Rossum <guido@python.org>
parents: 19457
diff changeset
1828
27521
17bfd5dbc0f1 Implement appropriate __getnewargs__ for all immutable subclassable builtin
Guido van Rossum <guido@python.org>
parents: 27484
diff changeset
1829 static PyObject *
17bfd5dbc0f1 Implement appropriate __getnewargs__ for all immutable subclassable builtin
Guido van Rossum <guido@python.org>
parents: 27484
diff changeset
1830 float_getnewargs(PyFloatObject *v)
17bfd5dbc0f1 Implement appropriate __getnewargs__ for all immutable subclassable builtin
Guido van Rossum <guido@python.org>
parents: 27484
diff changeset
1831 {
61465
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1832 return Py_BuildValue("(d)", v->ob_fval);
27521
17bfd5dbc0f1 Implement appropriate __getnewargs__ for all immutable subclassable builtin
Guido van Rossum <guido@python.org>
parents: 27484
diff changeset
1833 }
17bfd5dbc0f1 Implement appropriate __getnewargs__ for all immutable subclassable builtin
Guido van Rossum <guido@python.org>
parents: 27484
diff changeset
1834
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1835 /* this is for the benefit of the pack/unpack routines below */
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1836
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1837 typedef enum {
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1838 unknown_format, ieee_big_endian_format, ieee_little_endian_format
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1839 } float_format_type;
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1840
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1841 static float_format_type double_format, float_format;
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1842 static float_format_type detected_double_format, detected_float_format;
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1843
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1844 static PyObject *
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1845 float_getformat(PyTypeObject *v, PyObject* arg)
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1846 {
61465
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1847 char* s;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1848 float_format_type r;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1849
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1850 if (!PyString_Check(arg)) {
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1851 PyErr_Format(PyExc_TypeError,
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1852 "__getformat__() argument must be string, not %.500s",
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1853 Py_TYPE(arg)->tp_name);
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1854 return NULL;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1855 }
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1856 s = PyString_AS_STRING(arg);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1857 if (strcmp(s, "double") == 0) {
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1858 r = double_format;
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parents: 54002
diff changeset
1859 }
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1860 else if (strcmp(s, "float") == 0) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1861 r = float_format;
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parents: 54002
diff changeset
1862 }
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parents: 54002
diff changeset
1863 else {
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parents: 54002
diff changeset
1864 PyErr_SetString(PyExc_ValueError,
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1865 "__getformat__() argument 1 must be "
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1866 "'double' or 'float'");
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1867 return NULL;
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parents: 54002
diff changeset
1868 }
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parents: 54002
diff changeset
1869
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parents: 54002
diff changeset
1870 switch (r) {
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parents: 54002
diff changeset
1871 case unknown_format:
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parents: 54002
diff changeset
1872 return PyString_FromString("unknown");
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1873 case ieee_little_endian_format:
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parents: 54002
diff changeset
1874 return PyString_FromString("IEEE, little-endian");
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parents: 54002
diff changeset
1875 case ieee_big_endian_format:
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parents: 54002
diff changeset
1876 return PyString_FromString("IEEE, big-endian");
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parents: 54002
diff changeset
1877 default:
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parents: 54002
diff changeset
1878 Py_FatalError("insane float_format or double_format");
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parents: 54002
diff changeset
1879 return NULL;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1880 }
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1881 }
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1882
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1883 PyDoc_STRVAR(float_getformat_doc,
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1884 "float.__getformat__(typestr) -> string\n"
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1885 "\n"
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1886 "You probably don't want to use this function. It exists mainly to be\n"
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1887 "used in Python's test suite.\n"
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1888 "\n"
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1889 "typestr must be 'double' or 'float'. This function returns whichever of\n"
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1890 "'unknown', 'IEEE, big-endian' or 'IEEE, little-endian' best describes the\n"
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1891 "format of floating point numbers used by the C type named by typestr.");
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1892
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1893 static PyObject *
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1894 float_setformat(PyTypeObject *v, PyObject* args)
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1895 {
61465
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diff changeset
1896 char* typestr;
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parents: 54002
diff changeset
1897 char* format;
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parents: 54002
diff changeset
1898 float_format_type f;
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parents: 54002
diff changeset
1899 float_format_type detected;
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parents: 54002
diff changeset
1900 float_format_type *p;
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parents: 54002
diff changeset
1901
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parents: 54002
diff changeset
1902 if (!PyArg_ParseTuple(args, "ss:__setformat__", &typestr, &format))
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parents: 54002
diff changeset
1903 return NULL;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1904
61465
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diff changeset
1905 if (strcmp(typestr, "double") == 0) {
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parents: 54002
diff changeset
1906 p = &double_format;
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parents: 54002
diff changeset
1907 detected = detected_double_format;
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parents: 54002
diff changeset
1908 }
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diff changeset
1909 else if (strcmp(typestr, "float") == 0) {
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parents: 54002
diff changeset
1910 p = &float_format;
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diff changeset
1911 detected = detected_float_format;
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parents: 54002
diff changeset
1912 }
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diff changeset
1913 else {
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parents: 54002
diff changeset
1914 PyErr_SetString(PyExc_ValueError,
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parents: 54002
diff changeset
1915 "__setformat__() argument 1 must "
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parents: 54002
diff changeset
1916 "be 'double' or 'float'");
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parents: 54002
diff changeset
1917 return NULL;
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diff changeset
1918 }
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1919
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diff changeset
1920 if (strcmp(format, "unknown") == 0) {
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diff changeset
1921 f = unknown_format;
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diff changeset
1922 }
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diff changeset
1923 else if (strcmp(format, "IEEE, little-endian") == 0) {
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parents: 54002
diff changeset
1924 f = ieee_little_endian_format;
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diff changeset
1925 }
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parents: 54002
diff changeset
1926 else if (strcmp(format, "IEEE, big-endian") == 0) {
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parents: 54002
diff changeset
1927 f = ieee_big_endian_format;
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diff changeset
1928 }
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diff changeset
1929 else {
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diff changeset
1930 PyErr_SetString(PyExc_ValueError,
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parents: 54002
diff changeset
1931 "__setformat__() argument 2 must be "
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diff changeset
1932 "'unknown', 'IEEE, little-endian' or "
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diff changeset
1933 "'IEEE, big-endian'");
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diff changeset
1934 return NULL;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1935
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diff changeset
1936 }
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1937
61465
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diff changeset
1938 if (f != unknown_format && f != detected) {
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diff changeset
1939 PyErr_Format(PyExc_ValueError,
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diff changeset
1940 "can only set %s format to 'unknown' or the "
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diff changeset
1941 "detected platform value", typestr);
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diff changeset
1942 return NULL;
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1943 }
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1944
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diff changeset
1945 *p = f;
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diff changeset
1946 Py_RETURN_NONE;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1947 }
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1948
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1949 PyDoc_STRVAR(float_setformat_doc,
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1950 "float.__setformat__(typestr, fmt) -> None\n"
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1951 "\n"
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1952 "You probably don't want to use this function. It exists mainly to be\n"
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1953 "used in Python's test suite.\n"
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1954 "\n"
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1955 "typestr must be 'double' or 'float'. fmt must be one of 'unknown',\n"
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1956 "'IEEE, big-endian' or 'IEEE, little-endian', and in addition can only be\n"
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1957 "one of the latter two if it appears to match the underlying C reality.\n"
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1958 "\n"
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1959 "Overrides the automatic determination of C-level floating point type.\n"
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1960 "This affects how floats are converted to and from binary strings.");
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1961
44432
4f9723d9ca32 Backport PEP 3141 from the py3k branch to the trunk. This includes r50877 (just
Jeffrey Yasskin <jyasskin@gmail.com>
parents: 44350
diff changeset
1962 static PyObject *
4f9723d9ca32 Backport PEP 3141 from the py3k branch to the trunk. This includes r50877 (just
Jeffrey Yasskin <jyasskin@gmail.com>
parents: 44350
diff changeset
1963 float_getzero(PyObject *v, void *closure)
4f9723d9ca32 Backport PEP 3141 from the py3k branch to the trunk. This includes r50877 (just
Jeffrey Yasskin <jyasskin@gmail.com>
parents: 44350
diff changeset
1964 {
61465
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1965 return PyFloat_FromDouble(0.0);
44432
4f9723d9ca32 Backport PEP 3141 from the py3k branch to the trunk. This includes r50877 (just
Jeffrey Yasskin <jyasskin@gmail.com>
parents: 44350
diff changeset
1966 }
4f9723d9ca32 Backport PEP 3141 from the py3k branch to the trunk. This includes r50877 (just
Jeffrey Yasskin <jyasskin@gmail.com>
parents: 44350
diff changeset
1967
45381
b7231bf6bfb7 Backport of PEP 3101, Advanced String Formatting, from py3k.
Eric Smith <eric@trueblade.com>
parents: 45143
diff changeset
1968 static PyObject *
b7231bf6bfb7 Backport of PEP 3101, Advanced String Formatting, from py3k.
Eric Smith <eric@trueblade.com>
parents: 45143
diff changeset
1969 float__format__(PyObject *self, PyObject *args)
b7231bf6bfb7 Backport of PEP 3101, Advanced String Formatting, from py3k.
Eric Smith <eric@trueblade.com>
parents: 45143
diff changeset
1970 {
61465
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1971 PyObject *format_spec;
45381
b7231bf6bfb7 Backport of PEP 3101, Advanced String Formatting, from py3k.
Eric Smith <eric@trueblade.com>
parents: 45143
diff changeset
1972
61465
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1973 if (!PyArg_ParseTuple(args, "O:__format__", &format_spec))
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1974 return NULL;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1975 if (PyBytes_Check(format_spec))
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1976 return _PyFloat_FormatAdvanced(self,
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1977 PyBytes_AS_STRING(format_spec),
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1978 PyBytes_GET_SIZE(format_spec));
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1979 if (PyUnicode_Check(format_spec)) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1980 /* Convert format_spec to a str */
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1981 PyObject *result;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1982 PyObject *str_spec = PyObject_Str(format_spec);
45381
b7231bf6bfb7 Backport of PEP 3101, Advanced String Formatting, from py3k.
Eric Smith <eric@trueblade.com>
parents: 45143
diff changeset
1983
61465
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1984 if (str_spec == NULL)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1985 return NULL;
45381
b7231bf6bfb7 Backport of PEP 3101, Advanced String Formatting, from py3k.
Eric Smith <eric@trueblade.com>
parents: 45143
diff changeset
1986
61465
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1987 result = _PyFloat_FormatAdvanced(self,
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1988 PyBytes_AS_STRING(str_spec),
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1989 PyBytes_GET_SIZE(str_spec));
45381
b7231bf6bfb7 Backport of PEP 3101, Advanced String Formatting, from py3k.
Eric Smith <eric@trueblade.com>
parents: 45143
diff changeset
1990
61465
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1991 Py_DECREF(str_spec);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1992 return result;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1993 }
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1994 PyErr_SetString(PyExc_TypeError, "__format__ requires str or unicode");
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
1995 return NULL;
45381
b7231bf6bfb7 Backport of PEP 3101, Advanced String Formatting, from py3k.
Eric Smith <eric@trueblade.com>
parents: 45143
diff changeset
1996 }
b7231bf6bfb7 Backport of PEP 3101, Advanced String Formatting, from py3k.
Eric Smith <eric@trueblade.com>
parents: 45143
diff changeset
1997
b7231bf6bfb7 Backport of PEP 3101, Advanced String Formatting, from py3k.
Eric Smith <eric@trueblade.com>
parents: 45143
diff changeset
1998 PyDoc_STRVAR(float__format__doc,
b7231bf6bfb7 Backport of PEP 3101, Advanced String Formatting, from py3k.
Eric Smith <eric@trueblade.com>
parents: 45143
diff changeset
1999 "float.__format__(format_spec) -> string\n"
b7231bf6bfb7 Backport of PEP 3101, Advanced String Formatting, from py3k.
Eric Smith <eric@trueblade.com>
parents: 45143
diff changeset
2000 "\n"
b7231bf6bfb7 Backport of PEP 3101, Advanced String Formatting, from py3k.
Eric Smith <eric@trueblade.com>
parents: 45143
diff changeset
2001 "Formats the float according to format_spec.");
b7231bf6bfb7 Backport of PEP 3101, Advanced String Formatting, from py3k.
Eric Smith <eric@trueblade.com>
parents: 45143
diff changeset
2002
b7231bf6bfb7 Backport of PEP 3101, Advanced String Formatting, from py3k.
Eric Smith <eric@trueblade.com>
parents: 45143
diff changeset
2003
27521
17bfd5dbc0f1 Implement appropriate __getnewargs__ for all immutable subclassable builtin
Guido van Rossum <guido@python.org>
parents: 27484
diff changeset
2004 static PyMethodDef float_methods[] = {
61465
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2005 {"conjugate", (PyCFunction)float_float, METH_NOARGS,
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2006 "Returns self, the complex conjugate of any float."},
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2007 {"__trunc__", (PyCFunction)float_trunc, METH_NOARGS,
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2008 "Returns the Integral closest to x between 0 and x."},
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2009 {"as_integer_ratio", (PyCFunction)float_as_integer_ratio, METH_NOARGS,
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2010 float_as_integer_ratio_doc},
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2011 {"fromhex", (PyCFunction)float_fromhex,
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2012 METH_O|METH_CLASS, float_fromhex_doc},
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2013 {"hex", (PyCFunction)float_hex,
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2014 METH_NOARGS, float_hex_doc},
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2015 {"is_integer", (PyCFunction)float_is_integer, METH_NOARGS,
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2016 "Returns True if the float is an integer."},
46473
5bc7b20dc04a I finally got the time to update and merge Mark's and my trunk-math branch. The patch is collaborated work of Mark Dickinson and me. It was mostly done a few months ago. The patch fixes a lot of loose ends and edge cases related to operations with NaN, INF, very small values and complex math.
Christian Heimes <christian@cheimes.de>
parents: 46154
diff changeset
2017 #if 0
61465
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2018 {"is_inf", (PyCFunction)float_is_inf, METH_NOARGS,
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2019 "Returns True if the float is positive or negative infinite."},
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2020 {"is_finite", (PyCFunction)float_is_finite, METH_NOARGS,
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2021 "Returns True if the float is finite, neither infinite nor NaN."},
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2022 {"is_nan", (PyCFunction)float_is_nan, METH_NOARGS,
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2023 "Returns True if the float is not a number (NaN)."},
46473
5bc7b20dc04a I finally got the time to update and merge Mark's and my trunk-math branch. The patch is collaborated work of Mark Dickinson and me. It was mostly done a few months ago. The patch fixes a lot of loose ends and edge cases related to operations with NaN, INF, very small values and complex math.
Christian Heimes <christian@cheimes.de>
parents: 46154
diff changeset
2024 #endif
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2025 {"__getnewargs__", (PyCFunction)float_getnewargs, METH_NOARGS},
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2026 {"__getformat__", (PyCFunction)float_getformat,
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2027 METH_O|METH_CLASS, float_getformat_doc},
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2028 {"__setformat__", (PyCFunction)float_setformat,
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2029 METH_VARARGS|METH_CLASS, float_setformat_doc},
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2030 {"__format__", (PyCFunction)float__format__,
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2031 METH_VARARGS, float__format__doc},
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2032 {NULL, NULL} /* sentinel */
27521
17bfd5dbc0f1 Implement appropriate __getnewargs__ for all immutable subclassable builtin
Guido van Rossum <guido@python.org>
parents: 27484
diff changeset
2033 };
17bfd5dbc0f1 Implement appropriate __getnewargs__ for all immutable subclassable builtin
Guido van Rossum <guido@python.org>
parents: 27484
diff changeset
2034
44432
4f9723d9ca32 Backport PEP 3141 from the py3k branch to the trunk. This includes r50877 (just
Jeffrey Yasskin <jyasskin@gmail.com>
parents: 44350
diff changeset
2035 static PyGetSetDef float_getset[] = {
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2036 {"real",
44432
4f9723d9ca32 Backport PEP 3141 from the py3k branch to the trunk. This includes r50877 (just
Jeffrey Yasskin <jyasskin@gmail.com>
parents: 44350
diff changeset
2037 (getter)float_float, (setter)NULL,
4f9723d9ca32 Backport PEP 3141 from the py3k branch to the trunk. This includes r50877 (just
Jeffrey Yasskin <jyasskin@gmail.com>
parents: 44350
diff changeset
2038 "the real part of a complex number",
4f9723d9ca32 Backport PEP 3141 from the py3k branch to the trunk. This includes r50877 (just
Jeffrey Yasskin <jyasskin@gmail.com>
parents: 44350
diff changeset
2039 NULL},
61465
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2040 {"imag",
44432
4f9723d9ca32 Backport PEP 3141 from the py3k branch to the trunk. This includes r50877 (just
Jeffrey Yasskin <jyasskin@gmail.com>
parents: 44350
diff changeset
2041 (getter)float_getzero, (setter)NULL,
4f9723d9ca32 Backport PEP 3141 from the py3k branch to the trunk. This includes r50877 (just
Jeffrey Yasskin <jyasskin@gmail.com>
parents: 44350
diff changeset
2042 "the imaginary part of a complex number",
4f9723d9ca32 Backport PEP 3141 from the py3k branch to the trunk. This includes r50877 (just
Jeffrey Yasskin <jyasskin@gmail.com>
parents: 44350
diff changeset
2043 NULL},
4f9723d9ca32 Backport PEP 3141 from the py3k branch to the trunk. This includes r50877 (just
Jeffrey Yasskin <jyasskin@gmail.com>
parents: 44350
diff changeset
2044 {NULL} /* Sentinel */
4f9723d9ca32 Backport PEP 3141 from the py3k branch to the trunk. This includes r50877 (just
Jeffrey Yasskin <jyasskin@gmail.com>
parents: 44350
diff changeset
2045 };
4f9723d9ca32 Backport PEP 3141 from the py3k branch to the trunk. This includes r50877 (just
Jeffrey Yasskin <jyasskin@gmail.com>
parents: 44350
diff changeset
2046
23832
ed1ba37a46b7 Patch #568124: Add doc string macros.
Martin v. Löwis <martin@v.loewis.de>
parents: 23344
diff changeset
2047 PyDoc_STRVAR(float_doc,
18933
09df3254b49d Merge of descr-branch back into trunk.
Tim Peters <tim.peters@gmail.com>
parents: 18838
diff changeset
2048 "float(x) -> floating point number\n\
09df3254b49d Merge of descr-branch back into trunk.
Tim Peters <tim.peters@gmail.com>
parents: 18838
diff changeset
2049 \n\
23832
ed1ba37a46b7 Patch #568124: Add doc string macros.
Martin v. Löwis <martin@v.loewis.de>
parents: 23344
diff changeset
2050 Convert a string or number to a floating point number, if possible.");
18933
09df3254b49d Merge of descr-branch back into trunk.
Tim Peters <tim.peters@gmail.com>
parents: 18838
diff changeset
2051
09df3254b49d Merge of descr-branch back into trunk.
Tim Peters <tim.peters@gmail.com>
parents: 18838
diff changeset
2052
5396
d1447950fa04 Quickly renamed the last directory.
Guido van Rossum <guido@python.org>
parents: 5197
diff changeset
2053 static PyNumberMethods float_as_number = {
61465
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2054 float_add, /*nb_add*/
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2055 float_sub, /*nb_subtract*/
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2056 float_mul, /*nb_multiply*/
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2057 float_classic_div, /*nb_divide*/
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2058 float_rem, /*nb_remainder*/
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2059 float_divmod, /*nb_divmod*/
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2060 float_pow, /*nb_power*/
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2061 (unaryfunc)float_neg, /*nb_negative*/
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2062 (unaryfunc)float_float, /*nb_positive*/
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2063 (unaryfunc)float_abs, /*nb_absolute*/
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2064 (inquiry)float_nonzero, /*nb_nonzero*/
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2065 0, /*nb_invert*/
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2066 0, /*nb_lshift*/
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2067 0, /*nb_rshift*/
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parents: 54002
diff changeset
2068 0, /*nb_and*/
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2069 0, /*nb_xor*/
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2070 0, /*nb_or*/
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2071 float_coerce, /*nb_coerce*/
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2072 float_trunc, /*nb_int*/
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2073 float_long, /*nb_long*/
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2074 float_float, /*nb_float*/
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2075 0, /* nb_oct */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2076 0, /* nb_hex */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2077 0, /* nb_inplace_add */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2078 0, /* nb_inplace_subtract */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2079 0, /* nb_inplace_multiply */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2080 0, /* nb_inplace_divide */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2081 0, /* nb_inplace_remainder */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2082 0, /* nb_inplace_power */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2083 0, /* nb_inplace_lshift */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2084 0, /* nb_inplace_rshift */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2085 0, /* nb_inplace_and */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2086 0, /* nb_inplace_xor */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2087 0, /* nb_inplace_or */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2088 float_floor_div, /* nb_floor_divide */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2089 float_div, /* nb_true_divide */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2090 0, /* nb_inplace_floor_divide */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2091 0, /* nb_inplace_true_divide */
6
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
2092 };
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
2093
5396
d1447950fa04 Quickly renamed the last directory.
Guido van Rossum <guido@python.org>
parents: 5197
diff changeset
2094 PyTypeObject PyFloat_Type = {
61465
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2095 PyVarObject_HEAD_INIT(&PyType_Type, 0)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2096 "float",
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2097 sizeof(PyFloatObject),
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2098 0,
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2099 (destructor)float_dealloc, /* tp_dealloc */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2100 (printfunc)float_print, /* tp_print */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2101 0, /* tp_getattr */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2102 0, /* tp_setattr */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2103 0, /* tp_compare */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2104 (reprfunc)float_repr, /* tp_repr */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2105 &float_as_number, /* tp_as_number */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2106 0, /* tp_as_sequence */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2107 0, /* tp_as_mapping */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2108 (hashfunc)float_hash, /* tp_hash */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2109 0, /* tp_call */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2110 (reprfunc)float_str, /* tp_str */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2111 PyObject_GenericGetAttr, /* tp_getattro */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2112 0, /* tp_setattro */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2113 0, /* tp_as_buffer */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2114 Py_TPFLAGS_DEFAULT | Py_TPFLAGS_CHECKTYPES |
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2115 Py_TPFLAGS_BASETYPE, /* tp_flags */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2116 float_doc, /* tp_doc */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2117 0, /* tp_traverse */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2118 0, /* tp_clear */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2119 float_richcompare, /* tp_richcompare */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2120 0, /* tp_weaklistoffset */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2121 0, /* tp_iter */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2122 0, /* tp_iternext */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2123 float_methods, /* tp_methods */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2124 0, /* tp_members */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2125 float_getset, /* tp_getset */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2126 0, /* tp_base */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2127 0, /* tp_dict */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2128 0, /* tp_descr_get */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2129 0, /* tp_descr_set */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2130 0, /* tp_dictoffset */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2131 0, /* tp_init */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2132 0, /* tp_alloc */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2133 float_new, /* tp_new */
6
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
2134 };
5936
80d24364b932 Added _Fini() routines to free up some memory
Guido van Rossum <guido@python.org>
parents: 5504
diff changeset
2135
80d24364b932 Added _Fini() routines to free up some memory
Guido van Rossum <guido@python.org>
parents: 5504
diff changeset
2136 void
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2137 _PyFloat_Init(void)
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2138 {
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2139 /* We attempt to determine if this machine is using IEEE
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2140 floating point formats by peering at the bits of some
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2141 carefully chosen values. If it looks like we are on an
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2142 IEEE platform, the float packing/unpacking routines can
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2143 just copy bits, if not they resort to arithmetic & shifts
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2144 and masks. The shifts & masks approach works on all finite
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2145 values, but what happens to infinities, NaNs and signed
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2146 zeroes on packing is an accident, and attempting to unpack
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2147 a NaN or an infinity will raise an exception.
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2148
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2149 Note that if we're on some whacked-out platform which uses
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2150 IEEE formats but isn't strictly little-endian or big-
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2151 endian, we will fall back to the portable shifts & masks
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2152 method. */
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2153
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2154 #if SIZEOF_DOUBLE == 8
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2155 {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2156 double x = 9006104071832581.0;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2157 if (memcmp(&x, "\x43\x3f\xff\x01\x02\x03\x04\x05", 8) == 0)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2158 detected_double_format = ieee_big_endian_format;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2159 else if (memcmp(&x, "\x05\x04\x03\x02\x01\xff\x3f\x43", 8) == 0)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2160 detected_double_format = ieee_little_endian_format;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2161 else
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2162 detected_double_format = unknown_format;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2163 }
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2164 #else
61465
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2165 detected_double_format = unknown_format;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2166 #endif
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2167
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2168 #if SIZEOF_FLOAT == 4
61465
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2169 {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2170 float y = 16711938.0;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2171 if (memcmp(&y, "\x4b\x7f\x01\x02", 4) == 0)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2172 detected_float_format = ieee_big_endian_format;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2173 else if (memcmp(&y, "\x02\x01\x7f\x4b", 4) == 0)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2174 detected_float_format = ieee_little_endian_format;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2175 else
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2176 detected_float_format = unknown_format;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2177 }
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2178 #else
61465
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2179 detected_float_format = unknown_format;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2180 #endif
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2181
61465
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2182 double_format = detected_double_format;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2183 float_format = detected_float_format;
44267
f909872917b9 The new float repr causes too much trouble and pain. I'm disabling the feature until we have sorted out the issues on all machines. 64bit machines seem to have issues and Guido has reported even worse.
Christian Heimes <christian@cheimes.de>
parents: 44262
diff changeset
2184
61465
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2185 /* Init float info */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2186 if (FloatInfoType.tp_name == 0)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2187 PyStructSequence_InitType(&FloatInfoType, &floatinfo_desc);
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2188 }
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2189
47897
0738119c1ef8 - Issue #2862: Make int and float freelist management consistent with other
Gregory P. Smith <greg@mad-scientist.com>
parents: 47889
diff changeset
2190 int
0738119c1ef8 - Issue #2862: Make int and float freelist management consistent with other
Gregory P. Smith <greg@mad-scientist.com>
parents: 47889
diff changeset
2191 PyFloat_ClearFreeList(void)
5936
80d24364b932 Added _Fini() routines to free up some memory
Guido van Rossum <guido@python.org>
parents: 5504
diff changeset
2192 {
61465
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parents: 54002
diff changeset
2193 PyFloatObject *p;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2194 PyFloatBlock *list, *next;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2195 int i;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2196 int u; /* remaining unfreed ints per block */
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2197 int freelist_size = 0;
10382
e2a08a81e56f OK, try again. Vladimir gave me a fix for the alignment bus error,
Guido van Rossum <guido@python.org>
parents: 10375
diff changeset
2198
61465
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2199 list = block_list;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2200 block_list = NULL;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2201 free_list = NULL;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2202 while (list != NULL) {
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2203 u = 0;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2204 for (i = 0, p = &list->objects[0];
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2205 i < N_FLOATOBJECTS;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2206 i++, p++) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2207 if (PyFloat_CheckExact(p) && Py_REFCNT(p) != 0)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2208 u++;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2209 }
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2210 next = list->next;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2211 if (u) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2212 list->next = block_list;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2213 block_list = list;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2214 for (i = 0, p = &list->objects[0];
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2215 i < N_FLOATOBJECTS;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2216 i++, p++) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2217 if (!PyFloat_CheckExact(p) ||
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2218 Py_REFCNT(p) == 0) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2219 Py_TYPE(p) = (struct _typeobject *)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2220 free_list;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2221 free_list = p;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2222 }
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2223 }
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2224 }
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2225 else {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2226 PyMem_FREE(list);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2227 }
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2228 freelist_size += u;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2229 list = next;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2230 }
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2231 return freelist_size;
45143
8fdd6d62ea55 Patch #1953
Christian Heimes <christian@cheimes.de>
parents: 45101
diff changeset
2232 }
8fdd6d62ea55 Patch #1953
Christian Heimes <christian@cheimes.de>
parents: 45101
diff changeset
2233
8fdd6d62ea55 Patch #1953
Christian Heimes <christian@cheimes.de>
parents: 45101
diff changeset
2234 void
8fdd6d62ea55 Patch #1953
Christian Heimes <christian@cheimes.de>
parents: 45101
diff changeset
2235 PyFloat_Fini(void)
8fdd6d62ea55 Patch #1953
Christian Heimes <christian@cheimes.de>
parents: 45101
diff changeset
2236 {
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2237 PyFloatObject *p;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2238 PyFloatBlock *list;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2239 int i;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2240 int u; /* total unfreed floats per block */
45143
8fdd6d62ea55 Patch #1953
Christian Heimes <christian@cheimes.de>
parents: 45101
diff changeset
2241
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2242 u = PyFloat_ClearFreeList();
45143
8fdd6d62ea55 Patch #1953
Christian Heimes <christian@cheimes.de>
parents: 45101
diff changeset
2243
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2244 if (!Py_VerboseFlag)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2245 return;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2246 fprintf(stderr, "# cleanup floats");
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2247 if (!u) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2248 fprintf(stderr, "\n");
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2249 }
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2250 else {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2251 fprintf(stderr,
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2252 ": %d unfreed float%s\n",
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2253 u, u == 1 ? "" : "s");
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2254 }
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2255 if (Py_VerboseFlag > 1) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2256 list = block_list;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2257 while (list != NULL) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2258 for (i = 0, p = &list->objects[0];
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2259 i < N_FLOATOBJECTS;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2260 i++, p++) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2261 if (PyFloat_CheckExact(p) &&
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2262 Py_REFCNT(p) != 0) {
61463
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
2263 char *buf = PyOS_double_to_string(
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
2264 PyFloat_AS_DOUBLE(p), 'r',
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
2265 0, 0, NULL);
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
2266 if (buf) {
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
2267 /* XXX(twouters) cast
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
2268 refcount to long
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
2269 until %zd is
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
2270 universally
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
2271 available
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
2272 */
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
2273 fprintf(stderr,
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2274 "# <float at %p, refcnt=%ld, val=%s>\n",
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2275 p, (long)Py_REFCNT(p), buf);
61463
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
2276 PyMem_Free(buf);
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
2277 }
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2278 }
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2279 }
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2280 list = list->next;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2281 }
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2282 }
5936
80d24364b932 Added _Fini() routines to free up some memory
Guido van Rossum <guido@python.org>
parents: 5504
diff changeset
2283 }
28335
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2284
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2285 /*----------------------------------------------------------------------------
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2286 * _PyFloat_{Pack,Unpack}{4,8}. See floatobject.h.
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2287 */
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2288 int
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2289 _PyFloat_Pack4(double x, unsigned char *p, int le)
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2290 {
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2291 if (float_format == unknown_format) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2292 unsigned char sign;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2293 int e;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2294 double f;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2295 unsigned int fbits;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2296 int incr = 1;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2297
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2298 if (le) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2299 p += 3;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2300 incr = -1;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2301 }
28335
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2302
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2303 if (x < 0) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2304 sign = 1;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2305 x = -x;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2306 }
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2307 else
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2308 sign = 0;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2309
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2310 f = frexp(x, &e);
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2311
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2312 /* Normalize f to be in the range [1.0, 2.0) */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2313 if (0.5 <= f && f < 1.0) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2314 f *= 2.0;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2315 e--;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2316 }
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2317 else if (f == 0.0)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2318 e = 0;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2319 else {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2320 PyErr_SetString(PyExc_SystemError,
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2321 "frexp() result out of range");
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2322 return -1;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2323 }
28335
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2324
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2325 if (e >= 128)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2326 goto Overflow;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2327 else if (e < -126) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2328 /* Gradual underflow */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2329 f = ldexp(f, 126 + e);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2330 e = 0;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2331 }
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2332 else if (!(e == 0 && f == 0.0)) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2333 e += 127;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2334 f -= 1.0; /* Get rid of leading 1 */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2335 }
28335
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2336
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2337 f *= 8388608.0; /* 2**23 */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2338 fbits = (unsigned int)(f + 0.5); /* Round */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2339 assert(fbits <= 8388608);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2340 if (fbits >> 23) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2341 /* The carry propagated out of a string of 23 1 bits. */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2342 fbits = 0;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2343 ++e;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2344 if (e >= 255)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2345 goto Overflow;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2346 }
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2347
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2348 /* First byte */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2349 *p = (sign << 7) | (e >> 1);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2350 p += incr;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2351
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2352 /* Second byte */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2353 *p = (char) (((e & 1) << 7) | (fbits >> 16));
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2354 p += incr;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2355
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2356 /* Third byte */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2357 *p = (fbits >> 8) & 0xFF;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2358 p += incr;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2359
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2360 /* Fourth byte */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2361 *p = fbits & 0xFF;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2362
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2363 /* Done */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2364 return 0;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2365
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2366 }
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2367 else {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2368 float y = (float)x;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2369 const char *s = (char*)&y;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2370 int i, incr = 1;
28335
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2371
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2372 if (Py_IS_INFINITY(y) && !Py_IS_INFINITY(x))
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2373 goto Overflow;
45759
354e377c9590 Issue 705836: Fix struct.pack(">f", 1e40) to behave consistently
Mark Dickinson <dickinsm@gmail.com>
parents: 45381
diff changeset
2374
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2375 if ((float_format == ieee_little_endian_format && !le)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2376 || (float_format == ieee_big_endian_format && le)) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2377 p += 3;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2378 incr = -1;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2379 }
45759
354e377c9590 Issue 705836: Fix struct.pack(">f", 1e40) to behave consistently
Mark Dickinson <dickinsm@gmail.com>
parents: 45381
diff changeset
2380
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2381 for (i = 0; i < 4; i++) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2382 *p = *s++;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2383 p += incr;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2384 }
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2385 return 0;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2386 }
45759
354e377c9590 Issue 705836: Fix struct.pack(">f", 1e40) to behave consistently
Mark Dickinson <dickinsm@gmail.com>
parents: 45381
diff changeset
2387 Overflow:
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2388 PyErr_SetString(PyExc_OverflowError,
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2389 "float too large to pack with f format");
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2390 return -1;
28335
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2391 }
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2392
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2393 int
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2394 _PyFloat_Pack8(double x, unsigned char *p, int le)
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2395 {
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2396 if (double_format == unknown_format) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2397 unsigned char sign;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2398 int e;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2399 double f;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2400 unsigned int fhi, flo;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2401 int incr = 1;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2402
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2403 if (le) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2404 p += 7;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2405 incr = -1;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2406 }
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2407
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2408 if (x < 0) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2409 sign = 1;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2410 x = -x;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2411 }
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2412 else
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2413 sign = 0;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2414
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2415 f = frexp(x, &e);
28335
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2416
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2417 /* Normalize f to be in the range [1.0, 2.0) */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2418 if (0.5 <= f && f < 1.0) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2419 f *= 2.0;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2420 e--;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2421 }
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2422 else if (f == 0.0)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2423 e = 0;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2424 else {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2425 PyErr_SetString(PyExc_SystemError,
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2426 "frexp() result out of range");
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2427 return -1;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2428 }
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2429
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2430 if (e >= 1024)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2431 goto Overflow;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2432 else if (e < -1022) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2433 /* Gradual underflow */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2434 f = ldexp(f, 1022 + e);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2435 e = 0;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2436 }
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2437 else if (!(e == 0 && f == 0.0)) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2438 e += 1023;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2439 f -= 1.0; /* Get rid of leading 1 */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2440 }
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2441
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2442 /* fhi receives the high 28 bits; flo the low 24 bits (== 52 bits) */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2443 f *= 268435456.0; /* 2**28 */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2444 fhi = (unsigned int)f; /* Truncate */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2445 assert(fhi < 268435456);
28335
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2446
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2447 f -= (double)fhi;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2448 f *= 16777216.0; /* 2**24 */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2449 flo = (unsigned int)(f + 0.5); /* Round */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2450 assert(flo <= 16777216);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2451 if (flo >> 24) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2452 /* The carry propagated out of a string of 24 1 bits. */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2453 flo = 0;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2454 ++fhi;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2455 if (fhi >> 28) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2456 /* And it also progagated out of the next 28 bits. */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2457 fhi = 0;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2458 ++e;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2459 if (e >= 2047)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2460 goto Overflow;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2461 }
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2462 }
28335
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2463
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2464 /* First byte */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2465 *p = (sign << 7) | (e >> 4);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2466 p += incr;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2467
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2468 /* Second byte */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2469 *p = (unsigned char) (((e & 0xF) << 4) | (fhi >> 24));
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2470 p += incr;
28335
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2471
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2472 /* Third byte */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2473 *p = (fhi >> 16) & 0xFF;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2474 p += incr;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2475
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2476 /* Fourth byte */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2477 *p = (fhi >> 8) & 0xFF;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2478 p += incr;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2479
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2480 /* Fifth byte */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2481 *p = fhi & 0xFF;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2482 p += incr;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2483
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2484 /* Sixth byte */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2485 *p = (flo >> 16) & 0xFF;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2486 p += incr;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2487
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2488 /* Seventh byte */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2489 *p = (flo >> 8) & 0xFF;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2490 p += incr;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2491
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2492 /* Eighth byte */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2493 *p = flo & 0xFF;
61463
fd25030223b0 Untabify C files. Will watch buildbots.
Antoine Pitrou <solipsis@pitrou.net>
parents: 61323
diff changeset
2494 /* p += incr; Unneeded (for now) */
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2495
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2496 /* Done */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2497 return 0;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2498
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2499 Overflow:
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2500 PyErr_SetString(PyExc_OverflowError,
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2501 "float too large to pack with d format");
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2502 return -1;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2503 }
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2504 else {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2505 const char *s = (char*)&x;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2506 int i, incr = 1;
28335
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2507
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2508 if ((double_format == ieee_little_endian_format && !le)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2509 || (double_format == ieee_big_endian_format && le)) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2510 p += 7;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2511 incr = -1;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2512 }
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2513
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2514 for (i = 0; i < 8; i++) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2515 *p = *s++;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2516 p += incr;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2517 }
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2518 return 0;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2519 }
28335
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2520 }
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2521
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2522 double
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2523 _PyFloat_Unpack4(const unsigned char *p, int le)
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2524 {
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2525 if (float_format == unknown_format) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2526 unsigned char sign;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2527 int e;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2528 unsigned int f;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2529 double x;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2530 int incr = 1;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2531
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2532 if (le) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2533 p += 3;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2534 incr = -1;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2535 }
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2536
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2537 /* First byte */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2538 sign = (*p >> 7) & 1;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2539 e = (*p & 0x7F) << 1;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2540 p += incr;
28335
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2541
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2542 /* Second byte */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2543 e |= (*p >> 7) & 1;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2544 f = (*p & 0x7F) << 16;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2545 p += incr;
28335
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2546
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2547 if (e == 255) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2548 PyErr_SetString(
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2549 PyExc_ValueError,
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2550 "can't unpack IEEE 754 special value "
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2551 "on non-IEEE platform");
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2552 return -1;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2553 }
28335
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2554
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2555 /* Third byte */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2556 f |= *p << 8;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2557 p += incr;
28335
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2558
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2559 /* Fourth byte */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2560 f |= *p;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2561
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2562 x = (double)f / 8388608.0;
28335
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2563
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2564 /* XXX This sadly ignores Inf/NaN issues */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2565 if (e == 0)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2566 e = -126;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2567 else {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2568 x += 1.0;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2569 e -= 127;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2570 }
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2571 x = ldexp(x, e);
28335
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2572
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2573 if (sign)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2574 x = -x;
28335
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2575
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2576 return x;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2577 }
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2578 else {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2579 float x;
35987
8eda1a58a490 Fix bug
Michael W. Hudson <mwh@python.net>
parents: 35178
diff changeset
2580
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2581 if ((float_format == ieee_little_endian_format && !le)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2582 || (float_format == ieee_big_endian_format && le)) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2583 char buf[4];
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2584 char *d = &buf[3];
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2585 int i;
28335
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2586
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2587 for (i = 0; i < 4; i++) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2588 *d-- = *p++;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2589 }
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2590 memcpy(&x, buf, 4);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2591 }
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2592 else {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2593 memcpy(&x, p, 4);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2594 }
35987
8eda1a58a490 Fix bug
Michael W. Hudson <mwh@python.net>
parents: 35178
diff changeset
2595
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2596 return x;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2597 }
28335
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2598 }
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2599
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2600 double
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2601 _PyFloat_Unpack8(const unsigned char *p, int le)
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2602 {
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2603 if (double_format == unknown_format) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2604 unsigned char sign;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2605 int e;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2606 unsigned int fhi, flo;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2607 double x;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2608 int incr = 1;
28335
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2609
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2610 if (le) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2611 p += 7;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2612 incr = -1;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2613 }
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2614
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2615 /* First byte */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2616 sign = (*p >> 7) & 1;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2617 e = (*p & 0x7F) << 4;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2618
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2619 p += incr;
28335
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2620
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2621 /* Second byte */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2622 e |= (*p >> 4) & 0xF;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2623 fhi = (*p & 0xF) << 24;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2624 p += incr;
28335
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2625
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2626 if (e == 2047) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2627 PyErr_SetString(
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2628 PyExc_ValueError,
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2629 "can't unpack IEEE 754 special value "
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2630 "on non-IEEE platform");
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2631 return -1.0;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2632 }
28335
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2633
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2634 /* Third byte */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2635 fhi |= *p << 16;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2636 p += incr;
28335
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2637
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2638 /* Fourth byte */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2639 fhi |= *p << 8;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2640 p += incr;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2641
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2642 /* Fifth byte */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2643 fhi |= *p;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2644 p += incr;
28335
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2645
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2646 /* Sixth byte */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2647 flo = *p << 16;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2648 p += incr;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2649
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2650 /* Seventh byte */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2651 flo |= *p << 8;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2652 p += incr;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2653
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2654 /* Eighth byte */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2655 flo |= *p;
28335
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2656
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2657 x = (double)fhi + (double)flo / 16777216.0; /* 2**24 */
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2658 x /= 268435456.0; /* 2**28 */
28335
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2659
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2660 if (e == 0)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2661 e = -1022;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2662 else {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2663 x += 1.0;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2664 e -= 1023;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2665 }
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2666 x = ldexp(x, e);
28335
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2667
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2668 if (sign)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2669 x = -x;
28335
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2670
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2671 return x;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2672 }
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2673 else {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2674 double x;
35987
8eda1a58a490 Fix bug
Michael W. Hudson <mwh@python.net>
parents: 35178
diff changeset
2675
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2676 if ((double_format == ieee_little_endian_format && !le)
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2677 || (double_format == ieee_big_endian_format && le)) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2678 char buf[8];
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2679 char *d = &buf[7];
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2680 int i;
35987
8eda1a58a490 Fix bug
Michael W. Hudson <mwh@python.net>
parents: 35178
diff changeset
2681
61465
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2682 for (i = 0; i < 8; i++) {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2683 *d-- = *p++;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2684 }
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2685 memcpy(&x, buf, 8);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2686 }
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2687 else {
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2688 memcpy(&x, p, 8);
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2689 }
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2690
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2691 return x;
e38335d4df91 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54002
diff changeset
2692 }
28335
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2693 }