Mercurial > cpython-lru_cache-weakref

annotate Objects/floatobject.c @ 71285:8bc9dbc61ba6 3.2

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Issue #12326: document the recommended idiom for checking sys.platform on Unix systems. Also, point to the various alternatives.
author Antoine Pitrou <solipsis@pitrou.net>
date Sat, 09 Jul 2011 15:54:23 +0200
parents 7a36136cc01b
children 5b8800004955 0c50e849d455
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2 /* Float object implementation */
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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
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9 #include <ctype.h>
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10 #include <float.h>
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12 #undef MAX
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13 #undef MIN
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14 #define MAX(x, y) ((x) < (y) ? (y) : (x))
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15 #define MIN(x, y) ((x) < (y) ? (x) : (y))
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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
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24
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25 Since some Python programs can spend much of their time allocating
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26 and deallocating floats, these operations should be very fast.
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27 Therefore we use a dedicated allocation scheme with a much lower
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28 overhead (in space and time) than straight malloc(): a simple
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29 dedicated free list, filled when necessary with memory from malloc().
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31 block_list is a singly-linked list of all PyFloatBlocks ever allocated,
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32 linked via their next members. PyFloatBlocks are never returned to the
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33 system before shutdown (PyFloat_Fini).
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34
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35 free_list is a singly-linked list of available PyFloatObjects, linked
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36 via abuse of their ob_type members.
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37 */
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38
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39 #define BLOCK_SIZE 1000 /* 1K less typical malloc overhead */
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40 #define BHEAD_SIZE 8 /* Enough for a 64-bit pointer */
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41 #define N_FLOATOBJECTS ((BLOCK_SIZE - BHEAD_SIZE) / sizeof(PyFloatObject))
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42
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43 struct _floatblock {
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44 struct _floatblock *next;
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45 PyFloatObject objects[N_FLOATOBJECTS];
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46 };
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48 typedef struct _floatblock PyFloatBlock;
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49
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50 static PyFloatBlock *block_list = NULL;
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51 static PyFloatObject *free_list = NULL;
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52
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53 static PyFloatObject *
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54 fill_free_list(void)
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55 {
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56 PyFloatObject *p, *q;
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57 /* XXX Float blocks escape the object heap. Use PyObject_MALLOC ??? */
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58 p = (PyFloatObject *) PyMem_MALLOC(sizeof(PyFloatBlock));
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59 if (p == NULL)
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60 return (PyFloatObject *) PyErr_NoMemory();
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61 ((PyFloatBlock *)p)->next = block_list;
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62 block_list = (PyFloatBlock *)p;
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63 p = &((PyFloatBlock *)p)->objects[0];
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64 q = p + N_FLOATOBJECTS;
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65 while (--q > p)
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66 Py_TYPE(q) = (struct _typeobject *)(q-1);
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67 Py_TYPE(q) = NULL;
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68 return p + N_FLOATOBJECTS - 1;
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69 }
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70
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71 double
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72 PyFloat_GetMax(void)
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73 {
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74 return DBL_MAX;
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75 }
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76
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77 double
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78 PyFloat_GetMin(void)
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79 {
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80 return DBL_MIN;
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81 }
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82
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83 static PyTypeObject FloatInfoType;
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84
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85 PyDoc_STRVAR(floatinfo__doc__,
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86 "sys.float_info\n\
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87 \n\
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88 A structseq holding information about the float type. It contains low level\n\
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89 information about the precision and internal representation. Please study\n\
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90 your system's :file:`float.h` for more information.");
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91
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92 static PyStructSequence_Field floatinfo_fields[] = {
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93 {"max", "DBL_MAX -- maximum representable finite float"},
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94 {"max_exp", "DBL_MAX_EXP -- maximum int e such that radix**(e-1) "
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95 "is representable"},
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96 {"max_10_exp", "DBL_MAX_10_EXP -- maximum int e such that 10**e "
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97 "is representable"},
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98 {"min", "DBL_MIN -- Minimum positive normalizer float"},
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99 {"min_exp", "DBL_MIN_EXP -- minimum int e such that radix**(e-1) "
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100 "is a normalized float"},
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101 {"min_10_exp", "DBL_MIN_10_EXP -- minimum int e such that 10**e is "
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102 "a normalized"},
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103 {"dig", "DBL_DIG -- digits"},
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104 {"mant_dig", "DBL_MANT_DIG -- mantissa digits"},
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105 {"epsilon", "DBL_EPSILON -- Difference between 1 and the next "
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106 "representable float"},
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107 {"radix", "FLT_RADIX -- radix of exponent"},
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108 {"rounds", "FLT_ROUNDS -- addition rounds"},
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109 {0}
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110 };
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111
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112 static PyStructSequence_Desc floatinfo_desc = {
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113 "sys.float_info", /* name */
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114 floatinfo__doc__, /* doc */
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115 floatinfo_fields, /* fields */
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116 11
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117 };
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118
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119 PyObject *
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120 PyFloat_GetInfo(void)
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121 {
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122 PyObject* floatinfo;
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123 int pos = 0;
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124
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125 floatinfo = PyStructSequence_New(&FloatInfoType);
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126 if (floatinfo == NULL) {
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127 return NULL;
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128 }
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129
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130 #define SetIntFlag(flag) \
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131 PyStructSequence_SET_ITEM(floatinfo, pos++, PyLong_FromLong(flag))
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132 #define SetDblFlag(flag) \
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133 PyStructSequence_SET_ITEM(floatinfo, pos++, PyFloat_FromDouble(flag))
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134
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135 SetDblFlag(DBL_MAX);
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136 SetIntFlag(DBL_MAX_EXP);
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137 SetIntFlag(DBL_MAX_10_EXP);
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138 SetDblFlag(DBL_MIN);
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139 SetIntFlag(DBL_MIN_EXP);
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140 SetIntFlag(DBL_MIN_10_EXP);
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141 SetIntFlag(DBL_DIG);
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142 SetIntFlag(DBL_MANT_DIG);
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143 SetDblFlag(DBL_EPSILON);
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144 SetIntFlag(FLT_RADIX);
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145 SetIntFlag(FLT_ROUNDS);
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146 #undef SetIntFlag
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147 #undef SetDblFlag
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148
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149 if (PyErr_Occurred()) {
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150 Py_CLEAR(floatinfo);
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151 return NULL;
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152 }
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153 return floatinfo;
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154 }
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155
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156 PyObject *
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157 PyFloat_FromDouble(double fval)
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158 {
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159 register PyFloatObject *op;
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160 if (free_list == NULL) {
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161 if ((free_list = fill_free_list()) == NULL)
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162 return NULL;
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163 }
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164 /* Inline PyObject_New */
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165 op = free_list;
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166 free_list = (PyFloatObject *)Py_TYPE(op);
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167 PyObject_INIT(op, &PyFloat_Type);
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168 op->ob_fval = fval;
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169 return (PyObject *) op;
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170 }
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171
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172 PyObject *
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173 PyFloat_FromString(PyObject *v)
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174 {
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175 const char *s, *last, *end;
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176 double x;
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177 PyObject *s_buffer = NULL;
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178 Py_ssize_t len;
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179 PyObject *result = NULL;
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180
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181 if (PyUnicode_Check(v)) {
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182 Py_ssize_t i, buflen = PyUnicode_GET_SIZE(v);
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183 Py_UNICODE *bufptr;
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184 s_buffer = PyUnicode_TransformDecimalToASCII(
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185 PyUnicode_AS_UNICODE(v), buflen);
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186 if (s_buffer == NULL)
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187 return NULL;
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188 /* Replace non-ASCII whitespace with ' ' */
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189 bufptr = PyUnicode_AS_UNICODE(s_buffer);
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190 for (i = 0; i < buflen; i++) {
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191 Py_UNICODE ch = bufptr[i];
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192 if (ch > 127 && Py_UNICODE_ISSPACE(ch))
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193 bufptr[i] = ' ';
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194 }
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195 s = _PyUnicode_AsStringAndSize(s_buffer, &len);
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196 if (s == NULL) {
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197 Py_DECREF(s_buffer);
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198 return NULL;
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199 }
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200 last = s + len;
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201 }
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202 else if (PyObject_AsCharBuffer(v, &s, &len)) {
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203 PyErr_SetString(PyExc_TypeError,
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204 "float() argument must be a string or a number");
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205 return NULL;
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206 }
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207 last = s + len;
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208 /* strip space */
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209 while (s < last && Py_ISSPACE(*s))
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210 s++;
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211 while (s < last - 1 && Py_ISSPACE(last[-1]))
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212 last--;
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213 /* We don't care about overflow or underflow. If the platform
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214 * supports them, infinities and signed zeroes (on underflow) are
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215 * fine. */
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216 x = PyOS_string_to_double(s, (char **)&end, NULL);
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217 if (end != last) {
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218 PyErr_Format(PyExc_ValueError,
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219 "could not convert string to float: "
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220 "%R", v);
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221 result = NULL;
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222 }
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223 else if (x == -1.0 && PyErr_Occurred())
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224 result = NULL;
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225 else
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226 result = PyFloat_FromDouble(x);
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227
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228 Py_XDECREF(s_buffer);
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229 return result;
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230 }
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231
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232 static void
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233 float_dealloc(PyFloatObject *op)
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234 {
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235 if (PyFloat_CheckExact(op)) {
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236 Py_TYPE(op) = (struct _typeobject *)free_list;
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237 free_list = op;
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238 }
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239 else
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240 Py_TYPE(op)->tp_free((PyObject *)op);
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241 }
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242
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243 double
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244 PyFloat_AsDouble(PyObject *op)
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245 {
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246 PyNumberMethods *nb;
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247 PyFloatObject *fo;
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248 double val;
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249
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250 if (op && PyFloat_Check(op))
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251 return PyFloat_AS_DOUBLE((PyFloatObject*) op);
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252
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253 if (op == NULL) {
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254 PyErr_BadArgument();
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255 return -1;
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256 }
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257
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258 if ((nb = Py_TYPE(op)->tp_as_number) == NULL || nb->nb_float == NULL) {
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259 PyErr_SetString(PyExc_TypeError, "a float is required");
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260 return -1;
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261 }
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262
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263 fo = (PyFloatObject*) (*nb->nb_float) (op);
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264 if (fo == NULL)
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265 return -1;
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266 if (!PyFloat_Check(fo)) {
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267 PyErr_SetString(PyExc_TypeError,
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268 "nb_float should return float object");
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269 return -1;
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270 }
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271
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272 val = PyFloat_AS_DOUBLE(fo);
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273 Py_DECREF(fo);
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274
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275 return val;
6
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276 }
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277
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278 /* Macro and helper that convert PyObject obj to a C double and store
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279 the value in dbl. If conversion to double raises an exception, obj is
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280 set to NULL, and the function invoking this macro returns NULL. If
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281 obj is not of float, int or long type, Py_NotImplemented is incref'ed,
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282 stored in obj, and returned from the function invoking this macro.
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283 */
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284 #define CONVERT_TO_DOUBLE(obj, dbl) \
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285 if (PyFloat_Check(obj)) \
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286 dbl = PyFloat_AS_DOUBLE(obj); \
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287 else if (convert_to_double(&(obj), &(dbl)) < 0) \
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288 return obj;
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289
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290 /* Methods */
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291
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292 static int
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293 convert_to_double(PyObject **v, double *dbl)
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294 {
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295 register PyObject *obj = *v;
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296
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297 if (PyLong_Check(obj)) {
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298 *dbl = PyLong_AsDouble(obj);
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299 if (*dbl == -1.0 && PyErr_Occurred()) {
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300 *v = NULL;
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301 return -1;
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302 }
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303 }
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304 else {
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305 Py_INCREF(Py_NotImplemented);
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306 *v = Py_NotImplemented;
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307 return -1;
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308 }
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309 return 0;
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310 }
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311
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312 static PyObject *
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313 float_repr(PyFloatObject *v)
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314 {
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315 PyObject *result;
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316 char *buf = PyOS_double_to_string(PyFloat_AS_DOUBLE(v),
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317 'r', 0,
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318 Py_DTSF_ADD_DOT_0,
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319 NULL);
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320 if (!buf)
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321 return PyErr_NoMemory();
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322 result = PyUnicode_FromString(buf);
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323 PyMem_Free(buf);
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324 return result;
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325 }
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326
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327 /* Comparison is pretty much a nightmare. When comparing float to float,
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328 * we do it as straightforwardly (and long-windedly) as conceivable, so
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329 * that, e.g., Python x == y delivers the same result as the platform
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330 * C x == y when x and/or y is a NaN.
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331 * When mixing float with an integer type, there's no good *uniform* approach.
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332 * Converting the double to an integer obviously doesn't work, since we
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333 * may lose info from fractional bits. Converting the integer to a double
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334 * also has two failure modes: (1) a long int may trigger overflow (too
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335 * large to fit in the dynamic range of a C double); (2) even a C long may have
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336 * more bits than fit in a C double (e.g., on a a 64-bit box long may have
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337 * 63 bits of precision, but a C double probably has only 53), and then
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338 * we can falsely claim equality when low-order integer bits are lost by
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339 * coercion to double. So this part is painful too.
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340 */
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341
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342 static PyObject*
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343 float_richcompare(PyObject *v, PyObject *w, int op)
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344 {
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345 double i, j;
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346 int r = 0;
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347
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348 assert(PyFloat_Check(v));
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349 i = PyFloat_AS_DOUBLE(v);
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350
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351 /* Switch on the type of w. Set i and j to doubles to be compared,
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352 * and op to the richcomp to use.
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353 */
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354 if (PyFloat_Check(w))
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355 j = PyFloat_AS_DOUBLE(w);
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356
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357 else if (!Py_IS_FINITE(i)) {
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358 if (PyLong_Check(w))
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359 /* If i is an infinity, its magnitude exceeds any
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360 * finite integer, so it doesn't matter which int we
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361 * compare i with. If i is a NaN, similarly.
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362 */
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363 j = 0.0;
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364 else
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365 goto Unimplemented;
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366 }
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367
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368 else if (PyLong_Check(w)) {
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369 int vsign = i == 0.0 ? 0 : i < 0.0 ? -1 : 1;
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370 int wsign = _PyLong_Sign(w);
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371 size_t nbits;
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372 int exponent;
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373
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374 if (vsign != wsign) {
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375 /* Magnitudes are irrelevant -- the signs alone
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376 * determine the outcome.
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377 */
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378 i = (double)vsign;
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379 j = (double)wsign;
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380 goto Compare;
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381 }
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382 /* The signs are the same. */
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383 /* Convert w to a double if it fits. In particular, 0 fits. */
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384 nbits = _PyLong_NumBits(w);
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385 if (nbits == (size_t)-1 && PyErr_Occurred()) {
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386 /* This long is so large that size_t isn't big enough
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387 * to hold the # of bits. Replace with little doubles
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388 * that give the same outcome -- w is so large that
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389 * its magnitude must exceed the magnitude of any
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390 * finite float.
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391 */
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392 PyErr_Clear();
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parents: 54232
diff changeset
393 i = (double)vsign;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
394 assert(wsign != 0);
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
395 j = wsign * 2.0;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
396 goto Compare;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
397 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
398 if (nbits <= 48) {
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
399 j = PyLong_AsDouble(w);
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
400 /* It's impossible that <= 48 bits overflowed. */
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
401 assert(j != -1.0 || ! PyErr_Occurred());
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
402 goto Compare;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
403 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
404 assert(wsign != 0); /* else nbits was 0 */
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
405 assert(vsign != 0); /* if vsign were 0, then since wsign is
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
406 * not 0, we would have taken the
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
407 * vsign != wsign branch at the start */
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
408 /* We want to work with non-negative numbers. */
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
409 if (vsign < 0) {
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
410 /* "Multiply both sides" by -1; this also swaps the
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
411 * comparator.
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
412 */
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
413 i = -i;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
414 op = _Py_SwappedOp[op];
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
415 }
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
416 assert(i > 0.0);
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
417 (void) frexp(i, &exponent);
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
418 /* exponent is the # of bits in v before the radix point;
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diff changeset
419 * we know that nbits (the # of bits in w) > 48 at this point
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diff changeset
420 */
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parents: 54232
diff changeset
421 if (exponent < 0 || (size_t)exponent < nbits) {
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
422 i = 1.0;
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parents: 54232
diff changeset
423 j = 2.0;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
424 goto Compare;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
425 }
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
426 if ((size_t)exponent > nbits) {
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
427 i = 2.0;
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parents: 54232
diff changeset
428 j = 1.0;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
429 goto Compare;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
430 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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diff changeset
431 /* v and w have the same number of bits before the radix
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parents: 54232
diff changeset
432 * point. Construct two longs that have the same comparison
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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parents: 54232
diff changeset
433 * outcome.
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
434 */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
435 {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
436 double fracpart;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
437 double intpart;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
438 PyObject *result = NULL;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
439 PyObject *one = NULL;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
440 PyObject *vv = NULL;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
441 PyObject *ww = w;
33547
702367da2c72 SF bug #513866: Float/long comparison anomaly.
Tim Peters <tim.peters@gmail.com>
parents: 32533
diff changeset
442
61467
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diff changeset
443 if (wsign < 0) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
444 ww = PyNumber_Negative(w);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
445 if (ww == NULL)
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
446 goto Error;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
447 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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diff changeset
448 else
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Antoine Pitrou <solipsis@pitrou.net>
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diff changeset
449 Py_INCREF(ww);
33547
702367da2c72 SF bug #513866: Float/long comparison anomaly.
Tim Peters <tim.peters@gmail.com>
parents: 32533
diff changeset
450
61467
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diff changeset
451 fracpart = modf(i, &intpart);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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diff changeset
452 vv = PyLong_FromDouble(intpart);
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parents: 54232
diff changeset
453 if (vv == NULL)
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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parents: 54232
diff changeset
454 goto Error;
33547
702367da2c72 SF bug #513866: Float/long comparison anomaly.
Tim Peters <tim.peters@gmail.com>
parents: 32533
diff changeset
455
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
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diff changeset
456 if (fracpart != 0.0) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
457 /* Shift left, and or a 1 bit into vv
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
458 * to represent the lost fraction.
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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parents: 54232
diff changeset
459 */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
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diff changeset
460 PyObject *temp;
33547
702367da2c72 SF bug #513866: Float/long comparison anomaly.
Tim Peters <tim.peters@gmail.com>
parents: 32533
diff changeset
461
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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diff changeset
462 one = PyLong_FromLong(1);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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parents: 54232
diff changeset
463 if (one == NULL)
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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diff changeset
464 goto Error;
33547
702367da2c72 SF bug #513866: Float/long comparison anomaly.
Tim Peters <tim.peters@gmail.com>
parents: 32533
diff changeset
465
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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diff changeset
466 temp = PyNumber_Lshift(ww, one);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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diff changeset
467 if (temp == NULL)
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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parents: 54232
diff changeset
468 goto Error;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
469 Py_DECREF(ww);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
470 ww = temp;
33547
702367da2c72 SF bug #513866: Float/long comparison anomaly.
Tim Peters <tim.peters@gmail.com>
parents: 32533
diff changeset
471
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
472 temp = PyNumber_Lshift(vv, one);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
473 if (temp == NULL)
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
474 goto Error;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
475 Py_DECREF(vv);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
476 vv = temp;
33547
702367da2c72 SF bug #513866: Float/long comparison anomaly.
Tim Peters <tim.peters@gmail.com>
parents: 32533
diff changeset
477
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
478 temp = PyNumber_Or(vv, one);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
479 if (temp == NULL)
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
480 goto Error;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
481 Py_DECREF(vv);
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
482 vv = temp;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
483 }
33547
702367da2c72 SF bug #513866: Float/long comparison anomaly.
Tim Peters <tim.peters@gmail.com>
parents: 32533
diff changeset
484
61467
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Antoine Pitrou <solipsis@pitrou.net>
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diff changeset
485 r = PyObject_RichCompareBool(vv, ww, op);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
486 if (r < 0)
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
487 goto Error;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
488 result = PyBool_FromLong(r);
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
489 Error:
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
490 Py_XDECREF(vv);
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
491 Py_XDECREF(ww);
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
492 Py_XDECREF(one);
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
493 return result;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
494 }
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
495 } /* else if (PyLong_Check(w)) */
33547
702367da2c72 SF bug #513866: Float/long comparison anomaly.
Tim Peters <tim.peters@gmail.com>
parents: 32533
diff changeset
496
61467
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Antoine Pitrou <solipsis@pitrou.net>
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diff changeset
497 else /* w isn't float, int, or long */
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Antoine Pitrou <solipsis@pitrou.net>
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diff changeset
498 goto Unimplemented;
33547
702367da2c72 SF bug #513866: Float/long comparison anomaly.
Tim Peters <tim.peters@gmail.com>
parents: 32533
diff changeset
499
702367da2c72 SF bug #513866: Float/long comparison anomaly.
Tim Peters <tim.peters@gmail.com>
parents: 32533
diff changeset
500 Compare:
61467
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
501 PyFPE_START_PROTECT("richcompare", return NULL)
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
502 switch (op) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
503 case Py_EQ:
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
504 r = i == j;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
505 break;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
506 case Py_NE:
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
507 r = i != j;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
508 break;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
509 case Py_LE:
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
510 r = i <= j;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
511 break;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
512 case Py_GE:
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
513 r = i >= j;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
514 break;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
515 case Py_LT:
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
516 r = i < j;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
517 break;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
518 case Py_GT:
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
519 r = i > j;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
520 break;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
521 }
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
522 PyFPE_END_PROTECT(r)
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
523 return PyBool_FromLong(r);
33547
702367da2c72 SF bug #513866: Float/long comparison anomaly.
Tim Peters <tim.peters@gmail.com>
parents: 32533
diff changeset
524
702367da2c72 SF bug #513866: Float/long comparison anomaly.
Tim Peters <tim.peters@gmail.com>
parents: 32533
diff changeset
525 Unimplemented:
61467
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Antoine Pitrou <solipsis@pitrou.net>
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diff changeset
526 Py_INCREF(Py_NotImplemented);
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
527 return Py_NotImplemented;
31553
a6d8d5ace6a7 "Fix" (for certain configurations of the planets, including
Michael W. Hudson <mwh@python.net>
parents: 31384
diff changeset
528 }
a6d8d5ace6a7 "Fix" (for certain configurations of the planets, including
Michael W. Hudson <mwh@python.net>
parents: 31384
diff changeset
529
65494
e8969fb822fc make hashes always the size of pointers; introduce Py_hash_t #9778
Benjamin Peterson <benjamin@python.org>
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diff changeset
530 static Py_hash_t
13454
fcc75a3748f5 ANSI-fication of the sources.
Fred Drake <fdrake@acm.org>
parents: 13447
diff changeset
531 float_hash(PyFloatObject *v)
1257
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532 {
61467
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533 return _Py_HashDouble(v->ob_fval);
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diff changeset
534 }
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535
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536 static PyObject *
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537 float_add(PyObject *v, PyObject *w)
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538 {
61467
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539 double a,b;
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540 CONVERT_TO_DOUBLE(v, a);
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541 CONVERT_TO_DOUBLE(w, b);
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542 PyFPE_START_PROTECT("add", return 0)
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543 a = a + b;
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544 PyFPE_END_PROTECT(a)
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545 return PyFloat_FromDouble(a);
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546 }
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547
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548 static PyObject *
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549 float_sub(PyObject *v, PyObject *w)
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550 {
61467
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551 double a,b;
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552 CONVERT_TO_DOUBLE(v, a);
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553 CONVERT_TO_DOUBLE(w, b);
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554 PyFPE_START_PROTECT("subtract", return 0)
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555 a = a - b;
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556 PyFPE_END_PROTECT(a)
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557 return PyFloat_FromDouble(a);
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558 }
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559
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560 static PyObject *
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561 float_mul(PyObject *v, PyObject *w)
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562 {
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563 double a,b;
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564 CONVERT_TO_DOUBLE(v, a);
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565 CONVERT_TO_DOUBLE(w, b);
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566 PyFPE_START_PROTECT("multiply", return 0)
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567 a = a * b;
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568 PyFPE_END_PROTECT(a)
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569 return PyFloat_FromDouble(a);
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570 }
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571
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572 static PyObject *
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573 float_div(PyObject *v, PyObject *w)
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574 {
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575 double a,b;
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576 CONVERT_TO_DOUBLE(v, a);
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577 CONVERT_TO_DOUBLE(w, b);
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578 if (b == 0.0) {
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579 PyErr_SetString(PyExc_ZeroDivisionError,
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580 "float division by zero");
61467
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581 return NULL;
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582 }
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583 PyFPE_START_PROTECT("divide", return 0)
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584 a = a / b;
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585 PyFPE_END_PROTECT(a)
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586 return PyFloat_FromDouble(a);
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587 }
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588
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589 static PyObject *
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590 float_rem(PyObject *v, PyObject *w)
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591 {
61467
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592 double vx, wx;
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593 double mod;
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594 CONVERT_TO_DOUBLE(v, vx);
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595 CONVERT_TO_DOUBLE(w, wx);
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596 if (wx == 0.0) {
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597 PyErr_SetString(PyExc_ZeroDivisionError,
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598 "float modulo");
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599 return NULL;
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600 }
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601 PyFPE_START_PROTECT("modulo", return 0)
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602 mod = fmod(vx, wx);
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603 if (mod) {
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604 /* ensure the remainder has the same sign as the denominator */
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605 if ((wx < 0) != (mod < 0)) {
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606 mod += wx;
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607 }
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608 }
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609 else {
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610 /* the remainder is zero, and in the presence of signed zeroes
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611 fmod returns different results across platforms; ensure
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612 it has the same sign as the denominator. */
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613 mod = copysign(0.0, wx);
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614 }
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615 PyFPE_END_PROTECT(mod)
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616 return PyFloat_FromDouble(mod);
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617 }
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618
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619 static PyObject *
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620 float_divmod(PyObject *v, PyObject *w)
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621 {
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622 double vx, wx;
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623 double div, mod, floordiv;
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624 CONVERT_TO_DOUBLE(v, vx);
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625 CONVERT_TO_DOUBLE(w, wx);
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626 if (wx == 0.0) {
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627 PyErr_SetString(PyExc_ZeroDivisionError, "float divmod()");
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628 return NULL;
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629 }
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630 PyFPE_START_PROTECT("divmod", return 0)
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631 mod = fmod(vx, wx);
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632 /* fmod is typically exact, so vx-mod is *mathematically* an
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633 exact multiple of wx. But this is fp arithmetic, and fp
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634 vx - mod is an approximation; the result is that div may
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635 not be an exact integral value after the division, although
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636 it will always be very close to one.
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637 */
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638 div = (vx - mod) / wx;
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639 if (mod) {
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640 /* ensure the remainder has the same sign as the denominator */
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641 if ((wx < 0) != (mod < 0)) {
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642 mod += wx;
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643 div -= 1.0;
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644 }
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645 }
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646 else {
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647 /* the remainder is zero, and in the presence of signed zeroes
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648 fmod returns different results across platforms; ensure
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649 it has the same sign as the denominator. */
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650 mod = copysign(0.0, wx);
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651 }
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652 /* snap quotient to nearest integral value */
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653 if (div) {
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654 floordiv = floor(div);
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655 if (div - floordiv > 0.5)
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656 floordiv += 1.0;
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657 }
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658 else {
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659 /* div is zero - get the same sign as the true quotient */
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660 floordiv = copysign(0.0, vx / wx); /* zero w/ sign of vx/wx */
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661 }
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662 PyFPE_END_PROTECT(floordiv)
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663 return Py_BuildValue("(dd)", floordiv, mod);
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664 }
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665
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666 static PyObject *
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667 float_floor_div(PyObject *v, PyObject *w)
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668 {
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669 PyObject *t, *r;
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670
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671 t = float_divmod(v, w);
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672 if (t == NULL || t == Py_NotImplemented)
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673 return t;
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674 assert(PyTuple_CheckExact(t));
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675 r = PyTuple_GET_ITEM(t, 0);
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676 Py_INCREF(r);
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677 Py_DECREF(t);
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678 return r;
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679 }
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680
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681 /* determine whether x is an odd integer or not; assumes that
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682 x is not an infinity or nan. */
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683 #define DOUBLE_IS_ODD_INTEGER(x) (fmod(fabs(x), 2.0) == 1.0)
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684
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685 static PyObject *
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686 float_pow(PyObject *v, PyObject *w, PyObject *z)
6
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687 {
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688 double iv, iw, ix;
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689 int negate_result = 0;
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690
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691 if ((PyObject *)z != Py_None) {
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692 PyErr_SetString(PyExc_TypeError, "pow() 3rd argument not "
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693 "allowed unless all arguments are integers");
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694 return NULL;
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695 }
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696
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697 CONVERT_TO_DOUBLE(v, iv);
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698 CONVERT_TO_DOUBLE(w, iw);
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699
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700 /* Sort out special cases here instead of relying on pow() */
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701 if (iw == 0) { /* v**0 is 1, even 0**0 */
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702 return PyFloat_FromDouble(1.0);
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703 }
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704 if (Py_IS_NAN(iv)) { /* nan**w = nan, unless w == 0 */
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705 return PyFloat_FromDouble(iv);
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706 }
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707 if (Py_IS_NAN(iw)) { /* v**nan = nan, unless v == 1; 1**nan = 1 */
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708 return PyFloat_FromDouble(iv == 1.0 ? 1.0 : iw);
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709 }
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710 if (Py_IS_INFINITY(iw)) {
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711 /* v**inf is: 0.0 if abs(v) < 1; 1.0 if abs(v) == 1; inf if
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712 * abs(v) > 1 (including case where v infinite)
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713 *
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714 * v**-inf is: inf if abs(v) < 1; 1.0 if abs(v) == 1; 0.0 if
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715 * abs(v) > 1 (including case where v infinite)
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716 */
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717 iv = fabs(iv);
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718 if (iv == 1.0)
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719 return PyFloat_FromDouble(1.0);
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720 else if ((iw > 0.0) == (iv > 1.0))
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721 return PyFloat_FromDouble(fabs(iw)); /* return inf */
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722 else
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723 return PyFloat_FromDouble(0.0);
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724 }
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725 if (Py_IS_INFINITY(iv)) {
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726 /* (+-inf)**w is: inf for w positive, 0 for w negative; in
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727 * both cases, we need to add the appropriate sign if w is
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728 * an odd integer.
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729 */
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730 int iw_is_odd = DOUBLE_IS_ODD_INTEGER(iw);
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731 if (iw > 0.0)
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732 return PyFloat_FromDouble(iw_is_odd ? iv : fabs(iv));
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733 else
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734 return PyFloat_FromDouble(iw_is_odd ?
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735 copysign(0.0, iv) : 0.0);
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736 }
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737 if (iv == 0.0) { /* 0**w is: 0 for w positive, 1 for w zero
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738 (already dealt with above), and an error
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739 if w is negative. */
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740 int iw_is_odd = DOUBLE_IS_ODD_INTEGER(iw);
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741 if (iw < 0.0) {
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742 PyErr_SetString(PyExc_ZeroDivisionError,
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743 "0.0 cannot be raised to a "
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744 "negative power");
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745 return NULL;
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746 }
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747 /* use correct sign if iw is odd */
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748 return PyFloat_FromDouble(iw_is_odd ? iv : 0.0);
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749 }
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750
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751 if (iv < 0.0) {
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752 /* Whether this is an error is a mess, and bumps into libm
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753 * bugs so we have to figure it out ourselves.
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754 */
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755 if (iw != floor(iw)) {
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756 /* Negative numbers raised to fractional powers
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757 * become complex.
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758 */
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759 return PyComplex_Type.tp_as_number->nb_power(v, w, z);
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760 }
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761 /* iw is an exact integer, albeit perhaps a very large
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762 * one. Replace iv by its absolute value and remember
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763 * to negate the pow result if iw is odd.
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764 */
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765 iv = -iv;
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766 negate_result = DOUBLE_IS_ODD_INTEGER(iw);
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767 }
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768
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769 if (iv == 1.0) { /* 1**w is 1, even 1**inf and 1**nan */
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770 /* (-1) ** large_integer also ends up here. Here's an
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771 * extract from the comments for the previous
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772 * implementation explaining why this special case is
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773 * necessary:
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774 *
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775 * -1 raised to an exact integer should never be exceptional.
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776 * Alas, some libms (chiefly glibc as of early 2003) return
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777 * NaN and set EDOM on pow(-1, large_int) if the int doesn't
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778 * happen to be representable in a *C* integer. That's a
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779 * bug.
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780 */
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781 return PyFloat_FromDouble(negate_result ? -1.0 : 1.0);
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782 }
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783
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784 /* Now iv and iw are finite, iw is nonzero, and iv is
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785 * positive and not equal to 1.0. We finally allow
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786 * the platform pow to step in and do the rest.
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787 */
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788 errno = 0;
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789 PyFPE_START_PROTECT("pow", return NULL)
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790 ix = pow(iv, iw);
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791 PyFPE_END_PROTECT(ix)
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792 Py_ADJUST_ERANGE1(ix);
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793 if (negate_result)
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794 ix = -ix;
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795
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796 if (errno != 0) {
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797 /* We don't expect any errno value other than ERANGE, but
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798 * the range of libm bugs appears unbounded.
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799 */
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800 PyErr_SetFromErrno(errno == ERANGE ? PyExc_OverflowError :
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801 PyExc_ValueError);
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802 return NULL;
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803 }
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804 return PyFloat_FromDouble(ix);
6
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805 }
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806
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807 #undef DOUBLE_IS_ODD_INTEGER
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808
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809 static PyObject *
13454
fcc75a3748f5 ANSI-fication of the sources.
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parents: 13447
diff changeset
810 float_neg(PyFloatObject *v)
6
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811 {
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812 return PyFloat_FromDouble(-v->ob_fval);
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813 }
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814
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815 static PyObject *
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parents: 13447
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816 float_abs(PyFloatObject *v)
227
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Guido van Rossum <guido@python.org>
parents: 145
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817 {
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818 return PyFloat_FromDouble(fabs(v->ob_fval));
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819 }
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820
239
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821 static int
40401
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Jack Diederich <jackdied@gmail.com>
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822 float_bool(PyFloatObject *v)
239
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823 {
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824 return v->ob_fval != 0.0;
239
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825 }
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826
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827 static PyObject *
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828 float_is_integer(PyObject *v)
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829 {
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830 double x = PyFloat_AsDouble(v);
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831 PyObject *o;
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832
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833 if (x == -1.0 && PyErr_Occurred())
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834 return NULL;
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835 if (!Py_IS_FINITE(x))
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836 Py_RETURN_FALSE;
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837 errno = 0;
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838 PyFPE_START_PROTECT("is_integer", return NULL)
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839 o = (floor(x) == x) ? Py_True : Py_False;
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840 PyFPE_END_PROTECT(x)
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841 if (errno != 0) {
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842 PyErr_SetFromErrno(errno == ERANGE ? PyExc_OverflowError :
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843 PyExc_ValueError);
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844 return NULL;
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845 }
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846 Py_INCREF(o);
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847 return o;
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848 }
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849
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850 #if 0
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851 static PyObject *
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852 float_is_inf(PyObject *v)
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853 {
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854 double x = PyFloat_AsDouble(v);
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855 if (x == -1.0 && PyErr_Occurred())
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856 return NULL;
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857 return PyBool_FromLong((long)Py_IS_INFINITY(x));
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858 }
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859
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860 static PyObject *
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861 float_is_nan(PyObject *v)
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862 {
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863 double x = PyFloat_AsDouble(v);
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864 if (x == -1.0 && PyErr_Occurred())
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865 return NULL;
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866 return PyBool_FromLong((long)Py_IS_NAN(x));
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867 }
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868
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869 static PyObject *
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870 float_is_finite(PyObject *v)
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871 {
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872 double x = PyFloat_AsDouble(v);
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873 if (x == -1.0 && PyErr_Occurred())
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874 return NULL;
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875 return PyBool_FromLong((long)Py_IS_FINITE(x));
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876 }
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877 #endif
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878
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879 static PyObject *
42753
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Guido van Rossum <guido@python.org>
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diff changeset
880 float_trunc(PyObject *v)
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Guido van Rossum <guido@python.org>
parents: 955
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881 {
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882 double x = PyFloat_AsDouble(v);
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883 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
884
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885 (void)modf(x, &wholepart);
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886 /* Try to get out cheap if this fits in a Python int. The attempt
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887 * to cast to long must be protected, as C doesn't define what
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888 * happens if the double is too big to fit in a long. Some rare
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889 * systems raise an exception then (RISCOS was mentioned as one,
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890 * and someone using a non-default option on Sun also bumped into
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891 * that). Note that checking for >= and <= LONG_{MIN,MAX} would
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892 * still be vulnerable: if a long has more bits of precision than
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893 * a double, casting MIN/MAX to double may yield an approximation,
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894 * and if that's rounded up, then, e.g., wholepart=LONG_MAX+1 would
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895 * yield true from the C expression wholepart<=LONG_MAX, despite
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896 * that wholepart is actually greater than LONG_MAX.
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897 */
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898 if (LONG_MIN < wholepart && wholepart < LONG_MAX) {
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899 const long aslong = (long)wholepart;
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900 return PyLong_FromLong(aslong);
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901 }
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902 return PyLong_FromDouble(wholepart);
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903 }
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904
53218
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905 /* double_round: rounds a finite double to the closest multiple of
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906 10**-ndigits; here ndigits is within reasonable bounds (typically, -308 <=
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907 ndigits <= 323). Returns a Python float, or sets a Python error and
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908 returns NULL on failure (OverflowError and memory errors are possible). */
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909
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910 #ifndef PY_NO_SHORT_FLOAT_REPR
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911 /* version of double_round that uses the correctly-rounded string<->double
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912 conversions from Python/dtoa.c */
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913
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914 static PyObject *
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915 double_round(double x, int ndigits) {
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diff changeset
916
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917 double rounded;
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918 Py_ssize_t buflen, mybuflen=100;
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919 char *buf, *buf_end, shortbuf[100], *mybuf=shortbuf;
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920 int decpt, sign;
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921 PyObject *result = NULL;
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922
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923 /* round to a decimal string */
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924 buf = _Py_dg_dtoa(x, 3, ndigits, &decpt, &sign, &buf_end);
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925 if (buf == NULL) {
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diff changeset
926 PyErr_NoMemory();
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diff changeset
927 return NULL;
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diff changeset
928 }
53218
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Mark Dickinson <dickinsm@gmail.com>
parents: 53187
diff changeset
929
61467
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diff changeset
930 /* Get new buffer if shortbuf is too small. Space needed <= buf_end -
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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diff changeset
931 buf + 8: (1 extra for '0', 1 for sign, 5 for exp, 1 for '\0'). */
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diff changeset
932 buflen = buf_end - buf;
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diff changeset
933 if (buflen + 8 > mybuflen) {
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diff changeset
934 mybuflen = buflen+8;
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diff changeset
935 mybuf = (char *)PyMem_Malloc(mybuflen);
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diff changeset
936 if (mybuf == NULL) {
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diff changeset
937 PyErr_NoMemory();
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diff changeset
938 goto exit;
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diff changeset
939 }
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diff changeset
940 }
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diff changeset
941 /* copy buf to mybuf, adding exponent, sign and leading 0 */
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diff changeset
942 PyOS_snprintf(mybuf, mybuflen, "%s0%se%d", (sign ? "-" : ""),
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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diff changeset
943 buf, decpt - (int)buflen);
53218
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Mark Dickinson <dickinsm@gmail.com>
parents: 53187
diff changeset
944
61467
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diff changeset
945 /* and convert the resulting string back to a double */
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diff changeset
946 errno = 0;
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diff changeset
947 rounded = _Py_dg_strtod(mybuf, NULL);
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diff changeset
948 if (errno == ERANGE && fabs(rounded) >= 1.)
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diff changeset
949 PyErr_SetString(PyExc_OverflowError,
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diff changeset
950 "rounded value too large to represent");
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951 else
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952 result = PyFloat_FromDouble(rounded);
53218
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Mark Dickinson <dickinsm@gmail.com>
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diff changeset
953
61467
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diff changeset
954 /* done computing value; now clean up */
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955 if (mybuf != shortbuf)
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956 PyMem_Free(mybuf);
53218
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957 exit:
61467
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958 _Py_dg_freedtoa(buf);
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959 return result;
53218
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Mark Dickinson <dickinsm@gmail.com>
parents: 53187
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960 }
d43d64252d36 Issue #1869 (and 4707, 5118, 5473, 1456775): use the new
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961
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962 #else /* PY_NO_SHORT_FLOAT_REPR */
d43d64252d36 Issue #1869 (and 4707, 5118, 5473, 1456775): use the new
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963
d43d64252d36 Issue #1869 (and 4707, 5118, 5473, 1456775): use the new
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parents: 53187
diff changeset
964 /* fallback version, to be used when correctly rounded binary<->decimal
d43d64252d36 Issue #1869 (and 4707, 5118, 5473, 1456775): use the new
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parents: 53187
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965 conversions aren't available */
d43d64252d36 Issue #1869 (and 4707, 5118, 5473, 1456775): use the new
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966
d43d64252d36 Issue #1869 (and 4707, 5118, 5473, 1456775): use the new
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diff changeset
967 static PyObject *
d43d64252d36 Issue #1869 (and 4707, 5118, 5473, 1456775): use the new
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parents: 53187
diff changeset
968 double_round(double x, int ndigits) {
61467
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969 double pow1, pow2, y, z;
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970 if (ndigits >= 0) {
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971 if (ndigits > 22) {
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972 /* pow1 and pow2 are each safe from overflow, but
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diff changeset
973 pow1*pow2 ~= pow(10.0, ndigits) might overflow */
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974 pow1 = pow(10.0, (double)(ndigits-22));
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diff changeset
975 pow2 = 1e22;
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diff changeset
976 }
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977 else {
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978 pow1 = pow(10.0, (double)ndigits);
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diff changeset
979 pow2 = 1.0;
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diff changeset
980 }
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981 y = (x*pow1)*pow2;
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diff changeset
982 /* if y overflows, then rounded value is exactly x */
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diff changeset
983 if (!Py_IS_FINITE(y))
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diff changeset
984 return PyFloat_FromDouble(x);
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diff changeset
985 }
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986 else {
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987 pow1 = pow(10.0, (double)-ndigits);
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988 pow2 = 1.0; /* unused; silences a gcc compiler warning */
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989 y = x / pow1;
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990 }
53218
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991
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992 z = round(y);
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993 if (fabs(y-z) == 0.5)
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diff changeset
994 /* halfway between two integers; use round-half-even */
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diff changeset
995 z = 2.0*round(y/2.0);
53218
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996
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997 if (ndigits >= 0)
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diff changeset
998 z = (z / pow2) / pow1;
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diff changeset
999 else
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1000 z *= pow1;
53218
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diff changeset
1001
61467
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1002 /* if computation resulted in overflow, raise OverflowError */
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1003 if (!Py_IS_FINITE(z)) {
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1004 PyErr_SetString(PyExc_OverflowError,
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diff changeset
1005 "overflow occurred during round");
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1006 return NULL;
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1007 }
53218
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1008
61467
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1009 return PyFloat_FromDouble(z);
53218
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diff changeset
1010 }
d43d64252d36 Issue #1869 (and 4707, 5118, 5473, 1456775): use the new
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diff changeset
1011
d43d64252d36 Issue #1869 (and 4707, 5118, 5473, 1456775): use the new
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diff changeset
1012 #endif /* PY_NO_SHORT_FLOAT_REPR */
d43d64252d36 Issue #1869 (and 4707, 5118, 5473, 1456775): use the new
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parents: 53187
diff changeset
1013
d43d64252d36 Issue #1869 (and 4707, 5118, 5473, 1456775): use the new
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parents: 53187
diff changeset
1014 /* round a Python float v to the closest multiple of 10**-ndigits */
d43d64252d36 Issue #1869 (and 4707, 5118, 5473, 1456775): use the new
Mark Dickinson <dickinsm@gmail.com>
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diff changeset
1015
5396
d1447950fa04 Quickly renamed the last directory.
Guido van Rossum <guido@python.org>
parents: 5197
diff changeset
1016 static PyObject *
42753
077fe7860cc9 Finish the work on __round__ and __trunc__.
Guido van Rossum <guido@python.org>
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1017 float_round(PyObject *v, PyObject *args)
077fe7860cc9 Finish the work on __round__ and __trunc__.
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diff changeset
1018 {
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1019 double x, rounded;
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diff changeset
1020 PyObject *o_ndigits = NULL;
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1021 Py_ssize_t ndigits;
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1022
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1023 x = PyFloat_AsDouble(v);
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1024 if (!PyArg_ParseTuple(args, "|O", &o_ndigits))
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1025 return NULL;
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1026 if (o_ndigits == NULL) {
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diff changeset
1027 /* single-argument round: round to nearest integer */
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diff changeset
1028 rounded = round(x);
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diff changeset
1029 if (fabs(x-rounded) == 0.5)
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diff changeset
1030 /* halfway case: round to even */
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diff changeset
1031 rounded = 2.0*round(x/2.0);
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diff changeset
1032 return PyLong_FromDouble(rounded);
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diff changeset
1033 }
42753
077fe7860cc9 Finish the work on __round__ and __trunc__.
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diff changeset
1034
61467
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1035 /* interpret second argument as a Py_ssize_t; clips on overflow */
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diff changeset
1036 ndigits = PyNumber_AsSsize_t(o_ndigits, NULL);
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1037 if (ndigits == -1 && PyErr_Occurred())
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diff changeset
1038 return NULL;
53218
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parents: 53187
diff changeset
1039
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diff changeset
1040 /* nans and infinities round to themselves */
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diff changeset
1041 if (!Py_IS_FINITE(x))
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1042 return PyFloat_FromDouble(x);
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diff changeset
1043
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diff changeset
1044 /* Deal with extreme values for ndigits. For ndigits > NDIGITS_MAX, x
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1045 always rounds to itself. For ndigits < NDIGITS_MIN, x always
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diff changeset
1046 rounds to +-0.0. Here 0.30103 is an upper bound for log10(2). */
53218
d43d64252d36 Issue #1869 (and 4707, 5118, 5473, 1456775): use the new
Mark Dickinson <dickinsm@gmail.com>
parents: 53187
diff changeset
1047 #define NDIGITS_MAX ((int)((DBL_MANT_DIG-DBL_MIN_EXP) * 0.30103))
d43d64252d36 Issue #1869 (and 4707, 5118, 5473, 1456775): use the new
Mark Dickinson <dickinsm@gmail.com>
parents: 53187
diff changeset
1048 #define NDIGITS_MIN (-(int)((DBL_MAX_EXP + 1) * 0.30103))
61467
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diff changeset
1049 if (ndigits > NDIGITS_MAX)
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diff changeset
1050 /* return x */
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1051 return PyFloat_FromDouble(x);
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1052 else if (ndigits < NDIGITS_MIN)
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diff changeset
1053 /* return 0.0, but with sign of x */
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1054 return PyFloat_FromDouble(0.0*x);
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diff changeset
1055 else
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diff changeset
1056 /* finite x, and ndigits is not unreasonably large */
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diff changeset
1057 return double_round(x, (int)ndigits);
53218
d43d64252d36 Issue #1869 (and 4707, 5118, 5473, 1456775): use the new
Mark Dickinson <dickinsm@gmail.com>
parents: 53187
diff changeset
1058 #undef NDIGITS_MAX
d43d64252d36 Issue #1869 (and 4707, 5118, 5473, 1456775): use the new
Mark Dickinson <dickinsm@gmail.com>
parents: 53187
diff changeset
1059 #undef NDIGITS_MIN
42753
077fe7860cc9 Finish the work on __round__ and __trunc__.
Guido van Rossum <guido@python.org>
parents: 42559
diff changeset
1060 }
077fe7860cc9 Finish the work on __round__ and __trunc__.
Guido van Rossum <guido@python.org>
parents: 42559
diff changeset
1061
077fe7860cc9 Finish the work on __round__ and __trunc__.
Guido van Rossum <guido@python.org>
parents: 42559
diff changeset
1062 static PyObject *
13454
fcc75a3748f5 ANSI-fication of the sources.
Fred Drake <fdrake@acm.org>
parents: 13447
diff changeset
1063 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
1064 {
61467
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1065 if (PyFloat_CheckExact(v))
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diff changeset
1066 Py_INCREF(v);
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diff changeset
1067 else
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1068 v = PyFloat_FromDouble(((PyFloatObject *)v)->ob_fval);
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diff changeset
1069 return v;
1049
2ed511171809 Made builtins int(), long(), float(), oct() and hex() more generic.
Guido van Rossum <guido@python.org>
parents: 955
diff changeset
1070 }
2ed511171809 Made builtins int(), long(), float(), oct() and hex() more generic.
Guido van Rossum <guido@python.org>
parents: 955
diff changeset
1071
48497
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1072 /* turn ASCII hex characters into integer values and vice versa */
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diff changeset
1073
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1074 static char
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1075 char_from_hex(int x)
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diff changeset
1076 {
61467
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1077 assert(0 <= x && x < 16);
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1078 return "0123456789abcdef"[x];
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1079 }
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1080
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diff changeset
1081 static int
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1082 hex_from_char(char c) {
61467
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diff changeset
1083 int x;
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diff changeset
1084 switch(c) {
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1085 case '0':
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1086 x = 0;
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1087 break;
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1088 case '1':
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1089 x = 1;
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1090 break;
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1091 case '2':
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1092 x = 2;
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1093 break;
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1094 case '3':
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1095 x = 3;
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diff changeset
1096 break;
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1097 case '4':
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diff changeset
1098 x = 4;
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1099 break;
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1100 case '5':
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1101 x = 5;
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1102 break;
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1103 case '6':
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1104 x = 6;
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1105 break;
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1106 case '7':
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diff changeset
1107 x = 7;
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diff changeset
1108 break;
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1109 case '8':
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diff changeset
1110 x = 8;
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diff changeset
1111 break;
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diff changeset
1112 case '9':
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diff changeset
1113 x = 9;
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diff changeset
1114 break;
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diff changeset
1115 case 'a':
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diff changeset
1116 case 'A':
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diff changeset
1117 x = 10;
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diff changeset
1118 break;
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1119 case 'b':
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diff changeset
1120 case 'B':
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diff changeset
1121 x = 11;
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diff changeset
1122 break;
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1123 case 'c':
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diff changeset
1124 case 'C':
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diff changeset
1125 x = 12;
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diff changeset
1126 break;
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1127 case 'd':
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diff changeset
1128 case 'D':
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diff changeset
1129 x = 13;
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diff changeset
1130 break;
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diff changeset
1131 case 'e':
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diff changeset
1132 case 'E':
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diff changeset
1133 x = 14;
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diff changeset
1134 break;
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diff changeset
1135 case 'f':
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diff changeset
1136 case 'F':
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diff changeset
1137 x = 15;
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diff changeset
1138 break;
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diff changeset
1139 default:
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diff changeset
1140 x = -1;
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diff changeset
1141 break;
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1142 }
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diff changeset
1143 return x;
48497
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diff changeset
1144 }
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diff changeset
1145
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diff changeset
1146 /* convert a float to a hexadecimal string */
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diff changeset
1147
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diff changeset
1148 /* TOHEX_NBITS is DBL_MANT_DIG rounded up to the next integer
2bb866d282ba Merged revisions 64974 via svnmerge from
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diff changeset
1149 of the form 4k+1. */
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diff changeset
1150 #define TOHEX_NBITS DBL_MANT_DIG + 3 - (DBL_MANT_DIG+2)%4
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diff changeset
1151
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diff changeset
1152 static PyObject *
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diff changeset
1153 float_hex(PyObject *v)
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1154 {
61467
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diff changeset
1155 double x, m;
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diff changeset
1156 int e, shift, i, si, esign;
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diff changeset
1157 /* Space for 1+(TOHEX_NBITS-1)/4 digits, a decimal point, and the
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diff changeset
1158 trailing NUL byte. */
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diff changeset
1159 char s[(TOHEX_NBITS-1)/4+3];
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1160
61467
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diff changeset
1161 CONVERT_TO_DOUBLE(v, x);
48497
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diff changeset
1162
61467
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diff changeset
1163 if (Py_IS_NAN(x) || Py_IS_INFINITY(x))
63750
eafe07d40eb7 Issue #9337: Make float.__str__ identical to float.__repr__.
Mark Dickinson <dickinsm@gmail.com>
parents: 62834
diff changeset
1164 return float_repr((PyFloatObject *)v);
48497
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diff changeset
1165
61467
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diff changeset
1166 if (x == 0.0) {
62692
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diff changeset
1167 if (copysign(1.0, x) == -1.0)
61467
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1168 return PyUnicode_FromString("-0x0.0p+0");
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diff changeset
1169 else
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1170 return PyUnicode_FromString("0x0.0p+0");
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diff changeset
1171 }
48497
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1172
61467
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1173 m = frexp(fabs(x), &e);
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1174 shift = 1 - MAX(DBL_MIN_EXP - e, 0);
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1175 m = ldexp(m, shift);
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diff changeset
1176 e -= shift;
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1177
61467
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1178 si = 0;
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1179 s[si] = char_from_hex((int)m);
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1180 si++;
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1181 m -= (int)m;
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1182 s[si] = '.';
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diff changeset
1183 si++;
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1184 for (i=0; i < (TOHEX_NBITS-1)/4; i++) {
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1185 m *= 16.0;
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1186 s[si] = char_from_hex((int)m);
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diff changeset
1187 si++;
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1188 m -= (int)m;
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1189 }
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1190 s[si] = '\0';
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1191
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1192 if (e < 0) {
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1193 esign = (int)'-';
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1194 e = -e;
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1195 }
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1196 else
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1197 esign = (int)'+';
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1198
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1199 if (x < 0.0)
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1200 return PyUnicode_FromFormat("-0x%sp%c%d", s, esign, e);
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1201 else
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1202 return PyUnicode_FromFormat("0x%sp%c%d", s, esign, e);
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1203 }
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1204
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1205 PyDoc_STRVAR(float_hex_doc,
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1206 "float.hex() -> string\n\
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1207 \n\
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1208 Return a hexadecimal representation of a floating-point number.\n\
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1209 >>> (-0.1).hex()\n\
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1210 '-0x1.999999999999ap-4'\n\
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1211 >>> 3.14159.hex()\n\
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1212 '0x1.921f9f01b866ep+1'");
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1213
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1214 /* Convert a hexadecimal string to a float. */
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1215
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1216 static PyObject *
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1217 float_fromhex(PyObject *cls, PyObject *arg)
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1218 {
61467
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1219 PyObject *result_as_float, *result;
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1220 double x;
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1221 long exp, top_exp, lsb, key_digit;
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1222 char *s, *coeff_start, *s_store, *coeff_end, *exp_start, *s_end;
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1223 int half_eps, digit, round_up, negate=0;
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1224 Py_ssize_t length, ndigits, fdigits, i;
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1225
61467
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1226 /*
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1227 * For the sake of simplicity and correctness, we impose an artificial
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1228 * limit on ndigits, the total number of hex digits in the coefficient
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1229 * The limit is chosen to ensure that, writing exp for the exponent,
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1230 *
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1231 * (1) if exp > LONG_MAX/2 then the value of the hex string is
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1232 * guaranteed to overflow (provided it's nonzero)
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1233 *
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1234 * (2) if exp < LONG_MIN/2 then the value of the hex string is
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1235 * guaranteed to underflow to 0.
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diff changeset
1236 *
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1237 * (3) if LONG_MIN/2 <= exp <= LONG_MAX/2 then there's no danger of
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1238 * overflow in the calculation of exp and top_exp below.
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1239 *
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1240 * More specifically, ndigits is assumed to satisfy the following
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1241 * inequalities:
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1242 *
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1243 * 4*ndigits <= DBL_MIN_EXP - DBL_MANT_DIG - LONG_MIN/2
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1244 * 4*ndigits <= LONG_MAX/2 + 1 - DBL_MAX_EXP
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1245 *
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1246 * If either of these inequalities is not satisfied, a ValueError is
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1247 * raised. Otherwise, write x for the value of the hex string, and
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1248 * assume x is nonzero. Then
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1249 *
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1250 * 2**(exp-4*ndigits) <= |x| < 2**(exp+4*ndigits).
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1251 *
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1252 * Now if exp > LONG_MAX/2 then:
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1253 *
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1254 * exp - 4*ndigits >= LONG_MAX/2 + 1 - (LONG_MAX/2 + 1 - DBL_MAX_EXP)
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1255 * = DBL_MAX_EXP
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1256 *
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1257 * so |x| >= 2**DBL_MAX_EXP, which is too large to be stored in C
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1258 * double, so overflows. If exp < LONG_MIN/2, then
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1259 *
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1260 * exp + 4*ndigits <= LONG_MIN/2 - 1 + (
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1261 * DBL_MIN_EXP - DBL_MANT_DIG - LONG_MIN/2)
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1262 * = DBL_MIN_EXP - DBL_MANT_DIG - 1
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1263 *
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1264 * and so |x| < 2**(DBL_MIN_EXP-DBL_MANT_DIG-1), hence underflows to 0
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1265 * when converted to a C double.
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1266 *
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1267 * It's easy to show that if LONG_MIN/2 <= exp <= LONG_MAX/2 then both
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1268 * exp+4*ndigits and exp-4*ndigits are within the range of a long.
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1269 */
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1270
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1271 s = _PyUnicode_AsStringAndSize(arg, &length);
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1272 if (s == NULL)
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1273 return NULL;
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1274 s_end = s + length;
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1275
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1276 /********************
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1277 * Parse the string *
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1278 ********************/
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1279
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1280 /* leading whitespace */
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1281 while (Py_ISSPACE(*s))
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1282 s++;
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1283
61467
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1284 /* infinities and nans */
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1285 x = _Py_parse_inf_or_nan(s, &coeff_end);
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1286 if (coeff_end != s) {
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1287 s = coeff_end;
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1288 goto finished;
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1289 }
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1290
61467
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1291 /* optional sign */
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1292 if (*s == '-') {
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1293 s++;
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1294 negate = 1;
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1295 }
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1296 else if (*s == '+')
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1297 s++;
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1298
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1299 /* [0x] */
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1300 s_store = s;
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1301 if (*s == '0') {
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1302 s++;
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1303 if (*s == 'x' || *s == 'X')
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1304 s++;
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1305 else
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1306 s = s_store;
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1307 }
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1308
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1309 /* coefficient: <integer> [. <fraction>] */
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1310 coeff_start = s;
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1311 while (hex_from_char(*s) >= 0)
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1312 s++;
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1313 s_store = s;
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1314 if (*s == '.') {
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1315 s++;
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1316 while (hex_from_char(*s) >= 0)
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1317 s++;
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1318 coeff_end = s-1;
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1319 }
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1320 else
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1321 coeff_end = s;
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diff changeset
1322
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1323 /* ndigits = total # of hex digits; fdigits = # after point */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1324 ndigits = coeff_end - coeff_start;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1325 fdigits = coeff_end - s_store;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1326 if (ndigits == 0)
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1327 goto parse_error;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1328 if (ndigits > MIN(DBL_MIN_EXP - DBL_MANT_DIG - LONG_MIN/2,
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1329 LONG_MAX/2 + 1 - DBL_MAX_EXP)/4)
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1330 goto insane_length_error;
48497
2bb866d282ba Merged revisions 64974 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
parents: 48364
diff changeset
1331
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1332 /* [p <exponent>] */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1333 if (*s == 'p' || *s == 'P') {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1334 s++;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1335 exp_start = s;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1336 if (*s == '-' || *s == '+')
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1337 s++;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1338 if (!('0' <= *s && *s <= '9'))
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1339 goto parse_error;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1340 s++;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1341 while ('0' <= *s && *s <= '9')
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1342 s++;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1343 exp = strtol(exp_start, NULL, 10);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1344 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1345 else
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1346 exp = 0;
48497
2bb866d282ba Merged revisions 64974 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
parents: 48364
diff changeset
1347
2bb866d282ba Merged revisions 64974 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
parents: 48364
diff changeset
1348 /* for 0 <= j < ndigits, HEX_DIGIT(j) gives the jth most significant digit */
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1349 #define HEX_DIGIT(j) hex_from_char(*((j) < fdigits ? \
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1350 coeff_end-(j) : \
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1351 coeff_end-1-(j)))
48497
2bb866d282ba Merged revisions 64974 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
parents: 48364
diff changeset
1352
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1353 /*******************************************
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1354 * Compute rounded value of the hex string *
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1355 *******************************************/
48497
2bb866d282ba Merged revisions 64974 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
parents: 48364
diff changeset
1356
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1357 /* Discard leading zeros, and catch extreme overflow and underflow */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1358 while (ndigits > 0 && HEX_DIGIT(ndigits-1) == 0)
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1359 ndigits--;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1360 if (ndigits == 0 || exp < LONG_MIN/2) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1361 x = 0.0;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1362 goto finished;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1363 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1364 if (exp > LONG_MAX/2)
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1365 goto overflow_error;
48497
2bb866d282ba Merged revisions 64974 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
parents: 48364
diff changeset
1366
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1367 /* Adjust exponent for fractional part. */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1368 exp = exp - 4*((long)fdigits);
48497
2bb866d282ba Merged revisions 64974 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
parents: 48364
diff changeset
1369
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1370 /* top_exp = 1 more than exponent of most sig. bit of coefficient */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1371 top_exp = exp + 4*((long)ndigits - 1);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1372 for (digit = HEX_DIGIT(ndigits-1); digit != 0; digit /= 2)
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1373 top_exp++;
48497
2bb866d282ba Merged revisions 64974 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
parents: 48364
diff changeset
1374
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1375 /* catch almost all nonextreme cases of overflow and underflow here */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1376 if (top_exp < DBL_MIN_EXP - DBL_MANT_DIG) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1377 x = 0.0;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1378 goto finished;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1379 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1380 if (top_exp > DBL_MAX_EXP)
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1381 goto overflow_error;
48497
2bb866d282ba Merged revisions 64974 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
parents: 48364
diff changeset
1382
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1383 /* lsb = exponent of least significant bit of the *rounded* value.
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1384 This is top_exp - DBL_MANT_DIG unless result is subnormal. */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1385 lsb = MAX(top_exp, (long)DBL_MIN_EXP) - DBL_MANT_DIG;
48497
2bb866d282ba Merged revisions 64974 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
parents: 48364
diff changeset
1386
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1387 x = 0.0;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1388 if (exp >= lsb) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1389 /* no rounding required */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1390 for (i = ndigits-1; i >= 0; i--)
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1391 x = 16.0*x + HEX_DIGIT(i);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1392 x = ldexp(x, (int)(exp));
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1393 goto finished;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1394 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1395 /* rounding required. key_digit is the index of the hex digit
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1396 containing the first bit to be rounded away. */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1397 half_eps = 1 << (int)((lsb - exp - 1) % 4);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1398 key_digit = (lsb - exp - 1) / 4;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1399 for (i = ndigits-1; i > key_digit; i--)
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1400 x = 16.0*x + HEX_DIGIT(i);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1401 digit = HEX_DIGIT(key_digit);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1402 x = 16.0*x + (double)(digit & (16-2*half_eps));
48497
2bb866d282ba Merged revisions 64974 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
parents: 48364
diff changeset
1403
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1404 /* round-half-even: round up if bit lsb-1 is 1 and at least one of
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1405 bits lsb, lsb-2, lsb-3, lsb-4, ... is 1. */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1406 if ((digit & half_eps) != 0) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1407 round_up = 0;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1408 if ((digit & (3*half_eps-1)) != 0 ||
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1409 (half_eps == 8 && (HEX_DIGIT(key_digit+1) & 1) != 0))
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1410 round_up = 1;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1411 else
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1412 for (i = key_digit-1; i >= 0; i--)
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1413 if (HEX_DIGIT(i) != 0) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1414 round_up = 1;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1415 break;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1416 }
62834
202f31d40389 Style nit.
Mark Dickinson <dickinsm@gmail.com>
parents: 62690
diff changeset
1417 if (round_up) {
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1418 x += 2*half_eps;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1419 if (top_exp == DBL_MAX_EXP &&
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1420 x == ldexp((double)(2*half_eps), DBL_MANT_DIG))
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1421 /* overflow corner case: pre-rounded value <
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1422 2**DBL_MAX_EXP; rounded=2**DBL_MAX_EXP. */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1423 goto overflow_error;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1424 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1425 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1426 x = ldexp(x, (int)(exp+4*key_digit));
48497
2bb866d282ba Merged revisions 64974 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
parents: 48364
diff changeset
1427
2bb866d282ba Merged revisions 64974 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
parents: 48364
diff changeset
1428 finished:
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1429 /* optional trailing whitespace leading to the end of the string */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1430 while (Py_ISSPACE(*s))
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1431 s++;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1432 if (s != s_end)
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1433 goto parse_error;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1434 result_as_float = Py_BuildValue("(d)", negate ? -x : x);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1435 if (result_as_float == NULL)
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1436 return NULL;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1437 result = PyObject_CallObject(cls, result_as_float);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1438 Py_DECREF(result_as_float);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1439 return result;
48497
2bb866d282ba Merged revisions 64974 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
parents: 48364
diff changeset
1440
2bb866d282ba Merged revisions 64974 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
parents: 48364
diff changeset
1441 overflow_error:
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1442 PyErr_SetString(PyExc_OverflowError,
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1443 "hexadecimal value too large to represent as a float");
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1444 return NULL;
48497
2bb866d282ba Merged revisions 64974 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
parents: 48364
diff changeset
1445
2bb866d282ba Merged revisions 64974 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
parents: 48364
diff changeset
1446 parse_error:
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1447 PyErr_SetString(PyExc_ValueError,
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1448 "invalid hexadecimal floating-point string");
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1449 return NULL;
48497
2bb866d282ba Merged revisions 64974 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
parents: 48364
diff changeset
1450
2bb866d282ba Merged revisions 64974 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
parents: 48364
diff changeset
1451 insane_length_error:
61467
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parents: 54232
diff changeset
1452 PyErr_SetString(PyExc_ValueError,
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1453 "hexadecimal string too long to convert");
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1454 return NULL;
48497
2bb866d282ba Merged revisions 64974 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
parents: 48364
diff changeset
1455 }
2bb866d282ba Merged revisions 64974 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
parents: 48364
diff changeset
1456
2bb866d282ba Merged revisions 64974 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
parents: 48364
diff changeset
1457 PyDoc_STRVAR(float_fromhex_doc,
2bb866d282ba Merged revisions 64974 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
parents: 48364
diff changeset
1458 "float.fromhex(string) -> float\n\
2bb866d282ba Merged revisions 64974 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
parents: 48364
diff changeset
1459 \n\
2bb866d282ba Merged revisions 64974 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
parents: 48364
diff changeset
1460 Create a floating-point number from a hexadecimal string.\n\
2bb866d282ba Merged revisions 64974 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
parents: 48364
diff changeset
1461 >>> float.fromhex('0x1.ffffp10')\n\
2bb866d282ba Merged revisions 64974 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
parents: 48364
diff changeset
1462 2047.984375\n\
2bb866d282ba Merged revisions 64974 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
parents: 48364
diff changeset
1463 >>> float.fromhex('-0x1p-1074')\n\
2bb866d282ba Merged revisions 64974 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
parents: 48364
diff changeset
1464 -4.9406564584124654e-324");
2bb866d282ba Merged revisions 64974 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
parents: 48364
diff changeset
1465
2bb866d282ba Merged revisions 64974 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
parents: 48364
diff changeset
1466
45026
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Christian Heimes <christian@cheimes.de>
parents: 44943
diff changeset
1467 static PyObject *
45134
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Christian Heimes <christian@cheimes.de>
parents: 45071
diff changeset
1468 float_as_integer_ratio(PyObject *v, PyObject *unused)
45026
ebfbaa1051e2 Merged revisions 60364-60378 via svnmerge from
Christian Heimes <christian@cheimes.de>
parents: 44943
diff changeset
1469 {
61467
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1470 double self;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1471 double float_part;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1472 int exponent;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1473 int i;
45134
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Christian Heimes <christian@cheimes.de>
parents: 45071
diff changeset
1474
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1475 PyObject *prev;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1476 PyObject *py_exponent = NULL;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1477 PyObject *numerator = NULL;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1478 PyObject *denominator = NULL;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1479 PyObject *result_pair = NULL;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1480 PyNumberMethods *long_methods = PyLong_Type.tp_as_number;
45026
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Christian Heimes <christian@cheimes.de>
parents: 44943
diff changeset
1481
ebfbaa1051e2 Merged revisions 60364-60378 via svnmerge from
Christian Heimes <christian@cheimes.de>
parents: 44943
diff changeset
1482 #define INPLACE_UPDATE(obj, call) \
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1483 prev = obj; \
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1484 obj = call; \
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1485 Py_DECREF(prev); \
45026
ebfbaa1051e2 Merged revisions 60364-60378 via svnmerge from
Christian Heimes <christian@cheimes.de>
parents: 44943
diff changeset
1486
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1487 CONVERT_TO_DOUBLE(v, self);
45026
ebfbaa1051e2 Merged revisions 60364-60378 via svnmerge from
Christian Heimes <christian@cheimes.de>
parents: 44943
diff changeset
1488
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1489 if (Py_IS_INFINITY(self)) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1490 PyErr_SetString(PyExc_OverflowError,
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1491 "Cannot pass infinity to float.as_integer_ratio.");
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1492 return NULL;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1493 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1494 if (Py_IS_NAN(self)) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1495 PyErr_SetString(PyExc_ValueError,
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1496 "Cannot pass NaN to float.as_integer_ratio.");
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1497 return NULL;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1498 }
45026
ebfbaa1051e2 Merged revisions 60364-60378 via svnmerge from
Christian Heimes <christian@cheimes.de>
parents: 44943
diff changeset
1499
61467
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1500 PyFPE_START_PROTECT("as_integer_ratio", goto error);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1501 float_part = frexp(self, &exponent); /* self == float_part * 2**exponent exactly */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1502 PyFPE_END_PROTECT(float_part);
45026
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Christian Heimes <christian@cheimes.de>
parents: 44943
diff changeset
1503
61467
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1504 for (i=0; i<300 && float_part != floor(float_part) ; i++) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1505 float_part *= 2.0;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1506 exponent--;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1507 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1508 /* self == float_part * 2**exponent exactly and float_part is integral.
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1509 If FLT_RADIX != 2, the 300 steps may leave a tiny fractional part
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1510 to be truncated by PyLong_FromDouble(). */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1511
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1512 numerator = PyLong_FromDouble(float_part);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1513 if (numerator == NULL) goto error;
45026
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Christian Heimes <christian@cheimes.de>
parents: 44943
diff changeset
1514
61467
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1515 /* fold in 2**exponent */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1516 denominator = PyLong_FromLong(1);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1517 py_exponent = PyLong_FromLong(labs((long)exponent));
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1518 if (py_exponent == NULL) goto error;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1519 INPLACE_UPDATE(py_exponent,
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1520 long_methods->nb_lshift(denominator, py_exponent));
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1521 if (py_exponent == NULL) goto error;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1522 if (exponent > 0) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1523 INPLACE_UPDATE(numerator,
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1524 long_methods->nb_multiply(numerator, py_exponent));
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1525 if (numerator == NULL) goto error;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1526 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1527 else {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1528 Py_DECREF(denominator);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1529 denominator = py_exponent;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1530 py_exponent = NULL;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1531 }
45026
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Christian Heimes <christian@cheimes.de>
parents: 44943
diff changeset
1532
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1533 result_pair = PyTuple_Pack(2, numerator, denominator);
45026
ebfbaa1051e2 Merged revisions 60364-60378 via svnmerge from
Christian Heimes <christian@cheimes.de>
parents: 44943
diff changeset
1534
ebfbaa1051e2 Merged revisions 60364-60378 via svnmerge from
Christian Heimes <christian@cheimes.de>
parents: 44943
diff changeset
1535 #undef INPLACE_UPDATE
ebfbaa1051e2 Merged revisions 60364-60378 via svnmerge from
Christian Heimes <christian@cheimes.de>
parents: 44943
diff changeset
1536 error:
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1537 Py_XDECREF(py_exponent);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1538 Py_XDECREF(denominator);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1539 Py_XDECREF(numerator);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1540 return result_pair;
45026
ebfbaa1051e2 Merged revisions 60364-60378 via svnmerge from
Christian Heimes <christian@cheimes.de>
parents: 44943
diff changeset
1541 }
ebfbaa1051e2 Merged revisions 60364-60378 via svnmerge from
Christian Heimes <christian@cheimes.de>
parents: 44943
diff changeset
1542
ebfbaa1051e2 Merged revisions 60364-60378 via svnmerge from
Christian Heimes <christian@cheimes.de>
parents: 44943
diff changeset
1543 PyDoc_STRVAR(float_as_integer_ratio_doc,
ebfbaa1051e2 Merged revisions 60364-60378 via svnmerge from
Christian Heimes <christian@cheimes.de>
parents: 44943
diff changeset
1544 "float.as_integer_ratio() -> (int, int)\n"
ebfbaa1051e2 Merged revisions 60364-60378 via svnmerge from
Christian Heimes <christian@cheimes.de>
parents: 44943
diff changeset
1545 "\n"
45134
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Christian Heimes <christian@cheimes.de>
parents: 45071
diff changeset
1546 "Returns a pair of integers, whose ratio is exactly equal to the original\n"
bdcf40d1b38e Merged revisions 60481,60485,60489-60520,60523-60527,60530-60533,60535-60538,60540-60551 via svnmerge from
Christian Heimes <christian@cheimes.de>
parents: 45071
diff changeset
1547 "float and with a positive denominator.\n"
49493
bdf4da5d04ad merge from trunk
Benjamin Peterson <benjamin@python.org>
parents: 49270
diff changeset
1548 "Raises OverflowError on infinities and a ValueError on NaNs.\n"
45026
ebfbaa1051e2 Merged revisions 60364-60378 via svnmerge from
Christian Heimes <christian@cheimes.de>
parents: 44943
diff changeset
1549 "\n"
ebfbaa1051e2 Merged revisions 60364-60378 via svnmerge from
Christian Heimes <christian@cheimes.de>
parents: 44943
diff changeset
1550 ">>> (10.0).as_integer_ratio()\n"
45134
bdcf40d1b38e Merged revisions 60481,60485,60489-60520,60523-60527,60530-60533,60535-60538,60540-60551 via svnmerge from
Christian Heimes <christian@cheimes.de>
parents: 45071
diff changeset
1551 "(10, 1)\n"
45026
ebfbaa1051e2 Merged revisions 60364-60378 via svnmerge from
Christian Heimes <christian@cheimes.de>
parents: 44943
diff changeset
1552 ">>> (0.0).as_integer_ratio()\n"
ebfbaa1051e2 Merged revisions 60364-60378 via svnmerge from
Christian Heimes <christian@cheimes.de>
parents: 44943
diff changeset
1553 "(0, 1)\n"
ebfbaa1051e2 Merged revisions 60364-60378 via svnmerge from
Christian Heimes <christian@cheimes.de>
parents: 44943
diff changeset
1554 ">>> (-.25).as_integer_ratio()\n"
45134
bdcf40d1b38e Merged revisions 60481,60485,60489-60520,60523-60527,60530-60533,60535-60538,60540-60551 via svnmerge from
Christian Heimes <christian@cheimes.de>
parents: 45071
diff changeset
1555 "(-1, 4)");
45026
ebfbaa1051e2 Merged revisions 60364-60378 via svnmerge from
Christian Heimes <christian@cheimes.de>
parents: 44943
diff changeset
1556
1049
2ed511171809 Made builtins int(), long(), float(), oct() and hex() more generic.
Guido van Rossum <guido@python.org>
parents: 955
diff changeset
1557
24280
1598a1e473e2 staticforward bites the dust.
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 23832
diff changeset
1558 static PyObject *
19552
6c30d20d27f2 Make int, long and float subclassable.
Guido van Rossum <guido@python.org>
parents: 19457
diff changeset
1559 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
1560
18933
09df3254b49d Merge of descr-branch back into trunk.
Tim Peters <tim.peters@gmail.com>
parents: 18838
diff changeset
1561 static PyObject *
09df3254b49d Merge of descr-branch back into trunk.
Tim Peters <tim.peters@gmail.com>
parents: 18838
diff changeset
1562 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
1563 {
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1564 PyObject *x = Py_False; /* Integer zero */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1565 static char *kwlist[] = {"x", 0};
18933
09df3254b49d Merge of descr-branch back into trunk.
Tim Peters <tim.peters@gmail.com>
parents: 18838
diff changeset
1566
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1567 if (type != &PyFloat_Type)
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1568 return float_subtype_new(type, args, kwds); /* Wimp out */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1569 if (!PyArg_ParseTupleAndKeywords(args, kwds, "|O:float", kwlist, &x))
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1570 return NULL;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1571 /* If it's a string, but not a string subclass, use
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1572 PyFloat_FromString. */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1573 if (PyUnicode_CheckExact(x))
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1574 return PyFloat_FromString(x);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1575 return PyNumber_Float(x);
18933
09df3254b49d Merge of descr-branch back into trunk.
Tim Peters <tim.peters@gmail.com>
parents: 18838
diff changeset
1576 }
09df3254b49d Merge of descr-branch back into trunk.
Tim Peters <tim.peters@gmail.com>
parents: 18838
diff changeset
1577
19552
6c30d20d27f2 Make int, long and float subclassable.
Guido van Rossum <guido@python.org>
parents: 19457
diff changeset
1578 /* 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
1579 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
1580 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
1581 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
1582 */
6c30d20d27f2 Make int, long and float subclassable.
Guido van Rossum <guido@python.org>
parents: 19457
diff changeset
1583 static PyObject *
6c30d20d27f2 Make int, long and float subclassable.
Guido van Rossum <guido@python.org>
parents: 19457
diff changeset
1584 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
1585 {
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1586 PyObject *tmp, *newobj;
19552
6c30d20d27f2 Make int, long and float subclassable.
Guido van Rossum <guido@python.org>
parents: 19457
diff changeset
1587
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1588 assert(PyType_IsSubtype(type, &PyFloat_Type));
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1589 tmp = float_new(&PyFloat_Type, args, kwds);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1590 if (tmp == NULL)
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1591 return NULL;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1592 assert(PyFloat_CheckExact(tmp));
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1593 newobj = type->tp_alloc(type, 0);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1594 if (newobj == NULL) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1595 Py_DECREF(tmp);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1596 return NULL;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1597 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1598 ((PyFloatObject *)newobj)->ob_fval = ((PyFloatObject *)tmp)->ob_fval;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1599 Py_DECREF(tmp);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1600 return newobj;
19552
6c30d20d27f2 Make int, long and float subclassable.
Guido van Rossum <guido@python.org>
parents: 19457
diff changeset
1601 }
6c30d20d27f2 Make int, long and float subclassable.
Guido van Rossum <guido@python.org>
parents: 19457
diff changeset
1602
27521
17bfd5dbc0f1 Implement appropriate __getnewargs__ for all immutable subclassable builtin
Guido van Rossum <guido@python.org>
parents: 27484
diff changeset
1603 static PyObject *
17bfd5dbc0f1 Implement appropriate __getnewargs__ for all immutable subclassable builtin
Guido van Rossum <guido@python.org>
parents: 27484
diff changeset
1604 float_getnewargs(PyFloatObject *v)
17bfd5dbc0f1 Implement appropriate __getnewargs__ for all immutable subclassable builtin
Guido van Rossum <guido@python.org>
parents: 27484
diff changeset
1605 {
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1606 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
1607 }
17bfd5dbc0f1 Implement appropriate __getnewargs__ for all immutable subclassable builtin
Guido van Rossum <guido@python.org>
parents: 27484
diff changeset
1608
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1609 /* 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
1610
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1611 typedef enum {
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1612 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
1613 } float_format_type;
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1614
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1615 static float_format_type double_format, float_format;
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1616 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
1617
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1618 static PyObject *
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1619 float_getformat(PyTypeObject *v, PyObject* arg)
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1620 {
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1621 char* s;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1622 float_format_type r;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1623
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1624 if (!PyUnicode_Check(arg)) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1625 PyErr_Format(PyExc_TypeError,
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1626 "__getformat__() argument must be string, not %.500s",
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1627 Py_TYPE(arg)->tp_name);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1628 return NULL;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1629 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1630 s = _PyUnicode_AsString(arg);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1631 if (s == NULL)
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1632 return NULL;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1633 if (strcmp(s, "double") == 0) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1634 r = double_format;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1635 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1636 else if (strcmp(s, "float") == 0) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1637 r = float_format;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1638 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1639 else {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1640 PyErr_SetString(PyExc_ValueError,
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1641 "__getformat__() argument 1 must be "
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1642 "'double' or 'float'");
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1643 return NULL;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1644 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1645
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1646 switch (r) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1647 case unknown_format:
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1648 return PyUnicode_FromString("unknown");
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1649 case ieee_little_endian_format:
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1650 return PyUnicode_FromString("IEEE, little-endian");
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1651 case ieee_big_endian_format:
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1652 return PyUnicode_FromString("IEEE, big-endian");
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1653 default:
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1654 Py_FatalError("insane float_format or double_format");
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1655 return NULL;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1656 }
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1657 }
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1658
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1659 PyDoc_STRVAR(float_getformat_doc,
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1660 "float.__getformat__(typestr) -> string\n"
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1661 "\n"
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1662 "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
1663 "used in Python's test suite.\n"
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1664 "\n"
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1665 "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
1666 "'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
1667 "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
1668
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1669 static PyObject *
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1670 float_setformat(PyTypeObject *v, PyObject* args)
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1671 {
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1672 char* typestr;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1673 char* format;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1674 float_format_type f;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1675 float_format_type detected;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1676 float_format_type *p;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1677
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1678 if (!PyArg_ParseTuple(args, "ss:__setformat__", &typestr, &format))
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1679 return NULL;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1680
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1681 if (strcmp(typestr, "double") == 0) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1682 p = &double_format;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1683 detected = detected_double_format;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1684 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1685 else if (strcmp(typestr, "float") == 0) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1686 p = &float_format;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1687 detected = detected_float_format;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1688 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1689 else {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1690 PyErr_SetString(PyExc_ValueError,
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1691 "__setformat__() argument 1 must "
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1692 "be 'double' or 'float'");
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1693 return NULL;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1694 }
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1695
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1696 if (strcmp(format, "unknown") == 0) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1697 f = unknown_format;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1698 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1699 else if (strcmp(format, "IEEE, little-endian") == 0) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1700 f = ieee_little_endian_format;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1701 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1702 else if (strcmp(format, "IEEE, big-endian") == 0) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1703 f = ieee_big_endian_format;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1704 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1705 else {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1706 PyErr_SetString(PyExc_ValueError,
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1707 "__setformat__() argument 2 must be "
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1708 "'unknown', 'IEEE, little-endian' or "
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1709 "'IEEE, big-endian'");
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1710 return NULL;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1711
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1712 }
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1713
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1714 if (f != unknown_format && f != detected) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1715 PyErr_Format(PyExc_ValueError,
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1716 "can only set %s format to 'unknown' or the "
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1717 "detected platform value", typestr);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1718 return NULL;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1719 }
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1720
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1721 *p = f;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1722 Py_RETURN_NONE;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1723 }
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1724
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1725 PyDoc_STRVAR(float_setformat_doc,
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1726 "float.__setformat__(typestr, fmt) -> None\n"
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1727 "\n"
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1728 "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
1729 "used in Python's test suite.\n"
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1730 "\n"
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1731 "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
1732 "'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
1733 "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
1734 "\n"
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1735 "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
1736 "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
1737
42417
d3a5c796c8ba Changes to long and float by Jeffrey Jasskin to conform to PEP 3141.
Guido van Rossum <guido@python.org>
parents: 42334
diff changeset
1738 static PyObject *
d3a5c796c8ba Changes to long and float by Jeffrey Jasskin to conform to PEP 3141.
Guido van Rossum <guido@python.org>
parents: 42334
diff changeset
1739 float_getzero(PyObject *v, void *closure)
d3a5c796c8ba Changes to long and float by Jeffrey Jasskin to conform to PEP 3141.
Guido van Rossum <guido@python.org>
parents: 42334
diff changeset
1740 {
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1741 return PyFloat_FromDouble(0.0);
42417
d3a5c796c8ba Changes to long and float by Jeffrey Jasskin to conform to PEP 3141.
Guido van Rossum <guido@python.org>
parents: 42334
diff changeset
1742 }
d3a5c796c8ba Changes to long and float by Jeffrey Jasskin to conform to PEP 3141.
Guido van Rossum <guido@python.org>
parents: 42334
diff changeset
1743
42817
5355337709e1 Implementation of PEP 3101, Advanced String Formatting.
Eric Smith <eric@trueblade.com>
parents: 42753
diff changeset
1744 static PyObject *
5355337709e1 Implementation of PEP 3101, Advanced String Formatting.
Eric Smith <eric@trueblade.com>
parents: 42753
diff changeset
1745 float__format__(PyObject *self, PyObject *args)
5355337709e1 Implementation of PEP 3101, Advanced String Formatting.
Eric Smith <eric@trueblade.com>
parents: 42753
diff changeset
1746 {
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1747 PyObject *format_spec;
47393
0da27fdf0192 Refactor and clean up str.format() code (and helpers) in advance of optimizations.
Eric Smith <eric@trueblade.com>
parents: 46790
diff changeset
1748
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1749 if (!PyArg_ParseTuple(args, "U:__format__", &format_spec))
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1750 return NULL;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1751 return _PyFloat_FormatAdvanced(self,
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1752 PyUnicode_AS_UNICODE(format_spec),
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1753 PyUnicode_GET_SIZE(format_spec));
42817
5355337709e1 Implementation of PEP 3101, Advanced String Formatting.
Eric Smith <eric@trueblade.com>
parents: 42753
diff changeset
1754 }
5355337709e1 Implementation of PEP 3101, Advanced String Formatting.
Eric Smith <eric@trueblade.com>
parents: 42753
diff changeset
1755
5355337709e1 Implementation of PEP 3101, Advanced String Formatting.
Eric Smith <eric@trueblade.com>
parents: 42753
diff changeset
1756 PyDoc_STRVAR(float__format__doc,
5355337709e1 Implementation of PEP 3101, Advanced String Formatting.
Eric Smith <eric@trueblade.com>
parents: 42753
diff changeset
1757 "float.__format__(format_spec) -> string\n"
5355337709e1 Implementation of PEP 3101, Advanced String Formatting.
Eric Smith <eric@trueblade.com>
parents: 42753
diff changeset
1758 "\n"
5355337709e1 Implementation of PEP 3101, Advanced String Formatting.
Eric Smith <eric@trueblade.com>
parents: 42753
diff changeset
1759 "Formats the float according to format_spec.");
5355337709e1 Implementation of PEP 3101, Advanced String Formatting.
Eric Smith <eric@trueblade.com>
parents: 42753
diff changeset
1760
5355337709e1 Implementation of PEP 3101, Advanced String Formatting.
Eric Smith <eric@trueblade.com>
parents: 42753
diff changeset
1761
27521
17bfd5dbc0f1 Implement appropriate __getnewargs__ for all immutable subclassable builtin
Guido van Rossum <guido@python.org>
parents: 27484
diff changeset
1762 static PyMethodDef float_methods[] = {
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1763 {"conjugate", (PyCFunction)float_float, METH_NOARGS,
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1764 "Returns self, the complex conjugate of any float."},
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1765 {"__trunc__", (PyCFunction)float_trunc, METH_NOARGS,
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1766 "Returns the Integral closest to x between 0 and x."},
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1767 {"__round__", (PyCFunction)float_round, METH_VARARGS,
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1768 "Returns the Integral closest to x, rounding half toward even.\n"
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1769 "When an argument is passed, works like built-in round(x, ndigits)."},
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1770 {"as_integer_ratio", (PyCFunction)float_as_integer_ratio, METH_NOARGS,
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1771 float_as_integer_ratio_doc},
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1772 {"fromhex", (PyCFunction)float_fromhex,
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1773 METH_O|METH_CLASS, float_fromhex_doc},
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1774 {"hex", (PyCFunction)float_hex,
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1775 METH_NOARGS, float_hex_doc},
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1776 {"is_integer", (PyCFunction)float_is_integer, METH_NOARGS,
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1777 "Returns True if the float is an integer."},
46477
b69f443ef480 Merged revisions 62380,62382-62383 via svnmerge from
Christian Heimes <christian@cheimes.de>
parents: 46161
diff changeset
1778 #if 0
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1779 {"is_inf", (PyCFunction)float_is_inf, METH_NOARGS,
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1780 "Returns True if the float is positive or negative infinite."},
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1781 {"is_finite", (PyCFunction)float_is_finite, METH_NOARGS,
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1782 "Returns True if the float is finite, neither infinite nor NaN."},
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1783 {"is_nan", (PyCFunction)float_is_nan, METH_NOARGS,
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1784 "Returns True if the float is not a number (NaN)."},
46477
b69f443ef480 Merged revisions 62380,62382-62383 via svnmerge from
Christian Heimes <christian@cheimes.de>
parents: 46161
diff changeset
1785 #endif
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1786 {"__getnewargs__", (PyCFunction)float_getnewargs, METH_NOARGS},
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1787 {"__getformat__", (PyCFunction)float_getformat,
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1788 METH_O|METH_CLASS, float_getformat_doc},
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1789 {"__setformat__", (PyCFunction)float_setformat,
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1790 METH_VARARGS|METH_CLASS, float_setformat_doc},
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1791 {"__format__", (PyCFunction)float__format__,
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1792 METH_VARARGS, float__format__doc},
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1793 {NULL, NULL} /* sentinel */
27521
17bfd5dbc0f1 Implement appropriate __getnewargs__ for all immutable subclassable builtin
Guido van Rossum <guido@python.org>
parents: 27484
diff changeset
1794 };
17bfd5dbc0f1 Implement appropriate __getnewargs__ for all immutable subclassable builtin
Guido van Rossum <guido@python.org>
parents: 27484
diff changeset
1795
42417
d3a5c796c8ba Changes to long and float by Jeffrey Jasskin to conform to PEP 3141.
Guido van Rossum <guido@python.org>
parents: 42334
diff changeset
1796 static PyGetSetDef float_getset[] = {
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1797 {"real",
42417
d3a5c796c8ba Changes to long and float by Jeffrey Jasskin to conform to PEP 3141.
Guido van Rossum <guido@python.org>
parents: 42334
diff changeset
1798 (getter)float_float, (setter)NULL,
d3a5c796c8ba Changes to long and float by Jeffrey Jasskin to conform to PEP 3141.
Guido van Rossum <guido@python.org>
parents: 42334
diff changeset
1799 "the real part of a complex number",
d3a5c796c8ba Changes to long and float by Jeffrey Jasskin to conform to PEP 3141.
Guido van Rossum <guido@python.org>
parents: 42334
diff changeset
1800 NULL},
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1801 {"imag",
42417
d3a5c796c8ba Changes to long and float by Jeffrey Jasskin to conform to PEP 3141.
Guido van Rossum <guido@python.org>
parents: 42334
diff changeset
1802 (getter)float_getzero, (setter)NULL,
d3a5c796c8ba Changes to long and float by Jeffrey Jasskin to conform to PEP 3141.
Guido van Rossum <guido@python.org>
parents: 42334
diff changeset
1803 "the imaginary part of a complex number",
d3a5c796c8ba Changes to long and float by Jeffrey Jasskin to conform to PEP 3141.
Guido van Rossum <guido@python.org>
parents: 42334
diff changeset
1804 NULL},
d3a5c796c8ba Changes to long and float by Jeffrey Jasskin to conform to PEP 3141.
Guido van Rossum <guido@python.org>
parents: 42334
diff changeset
1805 {NULL} /* Sentinel */
d3a5c796c8ba Changes to long and float by Jeffrey Jasskin to conform to PEP 3141.
Guido van Rossum <guido@python.org>
parents: 42334
diff changeset
1806 };
d3a5c796c8ba Changes to long and float by Jeffrey Jasskin to conform to PEP 3141.
Guido van Rossum <guido@python.org>
parents: 42334
diff changeset
1807
23832
ed1ba37a46b7 Patch #568124: Add doc string macros.
Martin v. Löwis <martin@v.loewis.de>
parents: 23344
diff changeset
1808 PyDoc_STRVAR(float_doc,
18933
09df3254b49d Merge of descr-branch back into trunk.
Tim Peters <tim.peters@gmail.com>
parents: 18838
diff changeset
1809 "float(x) -> floating point number\n\
09df3254b49d Merge of descr-branch back into trunk.
Tim Peters <tim.peters@gmail.com>
parents: 18838
diff changeset
1810 \n\
23832
ed1ba37a46b7 Patch #568124: Add doc string macros.
Martin v. Löwis <martin@v.loewis.de>
parents: 23344
diff changeset
1811 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
1812
09df3254b49d Merge of descr-branch back into trunk.
Tim Peters <tim.peters@gmail.com>
parents: 18838
diff changeset
1813
5396
d1447950fa04 Quickly renamed the last directory.
Guido van Rossum <guido@python.org>
parents: 5197
diff changeset
1814 static PyNumberMethods float_as_number = {
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1815 float_add, /*nb_add*/
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1816 float_sub, /*nb_subtract*/
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1817 float_mul, /*nb_multiply*/
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1818 float_rem, /*nb_remainder*/
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1819 float_divmod, /*nb_divmod*/
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1820 float_pow, /*nb_power*/
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1821 (unaryfunc)float_neg, /*nb_negative*/
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1822 (unaryfunc)float_float, /*nb_positive*/
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1823 (unaryfunc)float_abs, /*nb_absolute*/
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1824 (inquiry)float_bool, /*nb_bool*/
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1825 0, /*nb_invert*/
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1826 0, /*nb_lshift*/
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1827 0, /*nb_rshift*/
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1828 0, /*nb_and*/
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1829 0, /*nb_xor*/
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1830 0, /*nb_or*/
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1831 float_trunc, /*nb_int*/
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1832 0, /*nb_reserved*/
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1833 float_float, /*nb_float*/
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1834 0, /* nb_inplace_add */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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parents: 54232
diff changeset
1835 0, /* nb_inplace_subtract */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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parents: 54232
diff changeset
1836 0, /* nb_inplace_multiply */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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parents: 54232
diff changeset
1837 0, /* nb_inplace_remainder */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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parents: 54232
diff changeset
1838 0, /* nb_inplace_power */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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parents: 54232
diff changeset
1839 0, /* nb_inplace_lshift */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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parents: 54232
diff changeset
1840 0, /* nb_inplace_rshift */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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parents: 54232
diff changeset
1841 0, /* nb_inplace_and */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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parents: 54232
diff changeset
1842 0, /* nb_inplace_xor */
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diff changeset
1843 0, /* nb_inplace_or */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
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diff changeset
1844 float_floor_div, /* nb_floor_divide */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1845 float_div, /* nb_true_divide */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1846 0, /* nb_inplace_floor_divide */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1847 0, /* nb_inplace_true_divide */
6
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
1848 };
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
1849
5396
d1447950fa04 Quickly renamed the last directory.
Guido van Rossum <guido@python.org>
parents: 5197
diff changeset
1850 PyTypeObject PyFloat_Type = {
61467
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diff changeset
1851 PyVarObject_HEAD_INIT(&PyType_Type, 0)
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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parents: 54232
diff changeset
1852 "float",
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parents: 54232
diff changeset
1853 sizeof(PyFloatObject),
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diff changeset
1854 0,
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parents: 54232
diff changeset
1855 (destructor)float_dealloc, /* tp_dealloc */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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parents: 54232
diff changeset
1856 0, /* tp_print */
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parents: 54232
diff changeset
1857 0, /* tp_getattr */
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parents: 54232
diff changeset
1858 0, /* tp_setattr */
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1859 0, /* tp_reserved */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1860 (reprfunc)float_repr, /* tp_repr */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1861 &float_as_number, /* tp_as_number */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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parents: 54232
diff changeset
1862 0, /* tp_as_sequence */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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parents: 54232
diff changeset
1863 0, /* tp_as_mapping */
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parents: 54232
diff changeset
1864 (hashfunc)float_hash, /* tp_hash */
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1865 0, /* tp_call */
63750
eafe07d40eb7 Issue #9337: Make float.__str__ identical to float.__repr__.
Mark Dickinson <dickinsm@gmail.com>
parents: 62834
diff changeset
1866 (reprfunc)float_repr, /* tp_str */
61467
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diff changeset
1867 PyObject_GenericGetAttr, /* tp_getattro */
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diff changeset
1868 0, /* tp_setattro */
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diff changeset
1869 0, /* tp_as_buffer */
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parents: 54232
diff changeset
1870 Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE, /* tp_flags */
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diff changeset
1871 float_doc, /* tp_doc */
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diff changeset
1872 0, /* tp_traverse */
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diff changeset
1873 0, /* tp_clear */
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diff changeset
1874 float_richcompare, /* tp_richcompare */
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parents: 54232
diff changeset
1875 0, /* tp_weaklistoffset */
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diff changeset
1876 0, /* tp_iter */
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diff changeset
1877 0, /* tp_iternext */
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parents: 54232
diff changeset
1878 float_methods, /* tp_methods */
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diff changeset
1879 0, /* tp_members */
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diff changeset
1880 float_getset, /* tp_getset */
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diff changeset
1881 0, /* tp_base */
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diff changeset
1882 0, /* tp_dict */
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diff changeset
1883 0, /* tp_descr_get */
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diff changeset
1884 0, /* tp_descr_set */
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diff changeset
1885 0, /* tp_dictoffset */
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diff changeset
1886 0, /* tp_init */
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diff changeset
1887 0, /* tp_alloc */
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diff changeset
1888 float_new, /* tp_new */
6
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
1889 };
5936
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Guido van Rossum <guido@python.org>
parents: 5504
diff changeset
1890
80d24364b932 Added _Fini() routines to free up some memory
Guido van Rossum <guido@python.org>
parents: 5504
diff changeset
1891 void
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
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diff changeset
1892 _PyFloat_Init(void)
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1893 {
61467
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1894 /* We attempt to determine if this machine is using IEEE
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diff changeset
1895 floating point formats by peering at the bits of some
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diff changeset
1896 carefully chosen values. If it looks like we are on an
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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diff changeset
1897 IEEE platform, the float packing/unpacking routines can
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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diff changeset
1898 just copy bits, if not they resort to arithmetic & shifts
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1899 and masks. The shifts & masks approach works on all finite
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1900 values, but what happens to infinities, NaNs and signed
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1901 zeroes on packing is an accident, and attempting to unpack
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diff changeset
1902 a NaN or an infinity will raise an exception.
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1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
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1903
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1904 Note that if we're on some whacked-out platform which uses
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1905 IEEE formats but isn't strictly little-endian or big-
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diff changeset
1906 endian, we will fall back to the portable shifts & masks
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diff changeset
1907 method. */
34972
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Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1908
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1909 #if SIZEOF_DOUBLE == 8
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1910 {
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1911 double x = 9006104071832581.0;
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1912 if (memcmp(&x, "\x43\x3f\xff\x01\x02\x03\x04\x05", 8) == 0)
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1913 detected_double_format = ieee_big_endian_format;
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1914 else if (memcmp(&x, "\x05\x04\x03\x02\x01\xff\x3f\x43", 8) == 0)
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diff changeset
1915 detected_double_format = ieee_little_endian_format;
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diff changeset
1916 else
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1917 detected_double_format = unknown_format;
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1918 }
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1919 #else
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1920 detected_double_format = unknown_format;
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1921 #endif
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
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1922
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1923 #if SIZEOF_FLOAT == 4
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1924 {
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1925 float y = 16711938.0;
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1926 if (memcmp(&y, "\x4b\x7f\x01\x02", 4) == 0)
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1927 detected_float_format = ieee_big_endian_format;
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1928 else if (memcmp(&y, "\x02\x01\x7f\x4b", 4) == 0)
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1929 detected_float_format = ieee_little_endian_format;
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1930 else
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1931 detected_float_format = unknown_format;
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1932 }
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1933 #else
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1934 detected_float_format = unknown_format;
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1935 #endif
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
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1936
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1937 double_format = detected_double_format;
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1938 float_format = detected_float_format;
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1939
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1940 /* Init float info */
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1941 if (FloatInfoType.tp_name == 0)
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1942 PyStructSequence_InitType(&FloatInfoType, &floatinfo_desc);
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1943 }
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1944
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1945 int
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1946 PyFloat_ClearFreeList(void)
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1947 {
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1948 PyFloatObject *p;
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1949 PyFloatBlock *list, *next;
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1950 int i;
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1951 int u; /* remaining unfreed floats per block */
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1952 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>
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1953
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1954 list = block_list;
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1955 block_list = NULL;
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1956 free_list = NULL;
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1957 while (list != NULL) {
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1958 u = 0;
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1959 for (i = 0, p = &list->objects[0];
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1960 i < N_FLOATOBJECTS;
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1961 i++, p++) {
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1962 if (PyFloat_CheckExact(p) && Py_REFCNT(p) != 0)
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1963 u++;
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1964 }
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1965 next = list->next;
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1966 if (u) {
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1967 list->next = block_list;
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1968 block_list = list;
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1969 for (i = 0, p = &list->objects[0];
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1970 i < N_FLOATOBJECTS;
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1971 i++, p++) {
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diff changeset
1972 if (!PyFloat_CheckExact(p) ||
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Antoine Pitrou <solipsis@pitrou.net>
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diff changeset
1973 Py_REFCNT(p) == 0) {
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Antoine Pitrou <solipsis@pitrou.net>
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diff changeset
1974 Py_TYPE(p) = (struct _typeobject *)
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1975 free_list;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1976 free_list = p;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1977 }
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1978 }
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Antoine Pitrou <solipsis@pitrou.net>
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diff changeset
1979 }
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Antoine Pitrou <solipsis@pitrou.net>
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diff changeset
1980 else {
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1981 PyMem_FREE(list);
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1982 }
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1983 freelist_size += u;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1984 list = next;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1985 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1986 return freelist_size;
45145
3d7b84daa34a Merged revisions 60481,60485,60489-60492,60494-60496,60498-60499,60501-60503,60505-60506,60508-60509,60523-60524,60532,60543,60545,60547-60548,60552-60567 via svnmerge from
Christian Heimes <christian@cheimes.de>
parents: 45134
diff changeset
1987 }
3d7b84daa34a Merged revisions 60481,60485,60489-60492,60494-60496,60498-60499,60501-60503,60505-60506,60508-60509,60523-60524,60532,60543,60545,60547-60548,60552-60567 via svnmerge from
Christian Heimes <christian@cheimes.de>
parents: 45134
diff changeset
1988
3d7b84daa34a Merged revisions 60481,60485,60489-60492,60494-60496,60498-60499,60501-60503,60505-60506,60508-60509,60523-60524,60532,60543,60545,60547-60548,60552-60567 via svnmerge from
Christian Heimes <christian@cheimes.de>
parents: 45134
diff changeset
1989 void
3d7b84daa34a Merged revisions 60481,60485,60489-60492,60494-60496,60498-60499,60501-60503,60505-60506,60508-60509,60523-60524,60532,60543,60545,60547-60548,60552-60567 via svnmerge from
Christian Heimes <christian@cheimes.de>
parents: 45134
diff changeset
1990 PyFloat_Fini(void)
3d7b84daa34a Merged revisions 60481,60485,60489-60492,60494-60496,60498-60499,60501-60503,60505-60506,60508-60509,60523-60524,60532,60543,60545,60547-60548,60552-60567 via svnmerge from
Christian Heimes <christian@cheimes.de>
parents: 45134
diff changeset
1991 {
61467
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Antoine Pitrou <solipsis@pitrou.net>
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diff changeset
1992 PyFloatObject *p;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1993 PyFloatBlock *list;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1994 int i;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1995 int u; /* total unfreed floats per block */
45145
3d7b84daa34a Merged revisions 60481,60485,60489-60492,60494-60496,60498-60499,60501-60503,60505-60506,60508-60509,60523-60524,60532,60543,60545,60547-60548,60552-60567 via svnmerge from
Christian Heimes <christian@cheimes.de>
parents: 45134
diff changeset
1996
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1997 u = PyFloat_ClearFreeList();
45145
3d7b84daa34a Merged revisions 60481,60485,60489-60492,60494-60496,60498-60499,60501-60503,60505-60506,60508-60509,60523-60524,60532,60543,60545,60547-60548,60552-60567 via svnmerge from
Christian Heimes <christian@cheimes.de>
parents: 45134
diff changeset
1998
61467
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1999 if (!Py_VerboseFlag)
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2000 return;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2001 fprintf(stderr, "# cleanup floats");
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2002 if (!u) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2003 fprintf(stderr, "\n");
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2004 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2005 else {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2006 fprintf(stderr,
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2007 ": %d unfreed float%s\n",
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2008 u, u == 1 ? "" : "s");
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2009 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2010 if (Py_VerboseFlag > 1) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2011 list = block_list;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2012 while (list != NULL) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2013 for (i = 0, p = &list->objects[0];
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2014 i < N_FLOATOBJECTS;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2015 i++, p++) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2016 if (PyFloat_CheckExact(p) &&
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2017 Py_REFCNT(p) != 0) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2018 char *buf = PyOS_double_to_string(
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2019 PyFloat_AS_DOUBLE(p), 'r',
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2020 0, 0, NULL);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2021 if (buf) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2022 /* XXX(twouters) cast
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2023 refcount to long
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2024 until %zd is
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2025 universally
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2026 available
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2027 */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2028 fprintf(stderr,
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2029 "# <float at %p, refcnt=%ld, val=%s>\n",
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2030 p, (long)Py_REFCNT(p), buf);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2031 PyMem_Free(buf);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2032 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2033 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2034 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2035 list = list->next;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2036 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2037 }
5936
80d24364b932 Added _Fini() routines to free up some memory
Guido van Rossum <guido@python.org>
parents: 5504
diff changeset
2038 }
28335
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2039
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2040 /*----------------------------------------------------------------------------
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2041 * _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
2042 */
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2043 int
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2044 _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
2045 {
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2046 if (float_format == unknown_format) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2047 unsigned char sign;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2048 int e;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2049 double f;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2050 unsigned int fbits;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2051 int incr = 1;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2052
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2053 if (le) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2054 p += 3;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2055 incr = -1;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2056 }
28335
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2057
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2058 if (x < 0) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2059 sign = 1;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2060 x = -x;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2061 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2062 else
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2063 sign = 0;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2064
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2065 f = frexp(x, &e);
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2066
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2067 /* Normalize f to be in the range [1.0, 2.0) */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2068 if (0.5 <= f && f < 1.0) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2069 f *= 2.0;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2070 e--;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2071 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2072 else if (f == 0.0)
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2073 e = 0;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2074 else {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2075 PyErr_SetString(PyExc_SystemError,
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2076 "frexp() result out of range");
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2077 return -1;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2078 }
28335
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2079
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2080 if (e >= 128)
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2081 goto Overflow;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2082 else if (e < -126) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2083 /* Gradual underflow */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2084 f = ldexp(f, 126 + e);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2085 e = 0;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2086 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2087 else if (!(e == 0 && f == 0.0)) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2088 e += 127;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2089 f -= 1.0; /* Get rid of leading 1 */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2090 }
28335
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2091
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2092 f *= 8388608.0; /* 2**23 */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2093 fbits = (unsigned int)(f + 0.5); /* Round */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2094 assert(fbits <= 8388608);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2095 if (fbits >> 23) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2096 /* The carry propagated out of a string of 23 1 bits. */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2097 fbits = 0;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2098 ++e;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2099 if (e >= 255)
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2100 goto Overflow;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2101 }
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2102
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2103 /* First byte */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2104 *p = (sign << 7) | (e >> 1);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2105 p += incr;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2106
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2107 /* Second byte */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2108 *p = (char) (((e & 1) << 7) | (fbits >> 16));
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2109 p += incr;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2110
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2111 /* Third byte */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2112 *p = (fbits >> 8) & 0xFF;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2113 p += incr;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2114
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2115 /* Fourth byte */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2116 *p = fbits & 0xFF;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2117
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2118 /* Done */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2119 return 0;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2120
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2121 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2122 else {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2123 float y = (float)x;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2124 const char *s = (char*)&y;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2125 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
2126
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2127 if (Py_IS_INFINITY(y) && !Py_IS_INFINITY(x))
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2128 goto Overflow;
45773
832c820e9d14 Merged revisions 61239-61249,61252-61257,61260-61264,61269-61275,61278-61279,61285-61286,61288-61290,61298,61303-61305,61312-61314,61317,61329,61332,61344,61350-61351,61363-61376,61378-61379,61382-61383,61387-61388,61392,61395-61396,61402-61403 via svnmerge from
Christian Heimes <christian@cheimes.de>
parents: 45145
diff changeset
2129
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2130 if ((float_format == ieee_little_endian_format && !le)
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2131 || (float_format == ieee_big_endian_format && le)) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2132 p += 3;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2133 incr = -1;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2134 }
45773
832c820e9d14 Merged revisions 61239-61249,61252-61257,61260-61264,61269-61275,61278-61279,61285-61286,61288-61290,61298,61303-61305,61312-61314,61317,61329,61332,61344,61350-61351,61363-61376,61378-61379,61382-61383,61387-61388,61392,61395-61396,61402-61403 via svnmerge from
Christian Heimes <christian@cheimes.de>
parents: 45145
diff changeset
2135
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2136 for (i = 0; i < 4; i++) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2137 *p = *s++;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2138 p += incr;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2139 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2140 return 0;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2141 }
45773
832c820e9d14 Merged revisions 61239-61249,61252-61257,61260-61264,61269-61275,61278-61279,61285-61286,61288-61290,61298,61303-61305,61312-61314,61317,61329,61332,61344,61350-61351,61363-61376,61378-61379,61382-61383,61387-61388,61392,61395-61396,61402-61403 via svnmerge from
Christian Heimes <christian@cheimes.de>
parents: 45145
diff changeset
2142 Overflow:
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2143 PyErr_SetString(PyExc_OverflowError,
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2144 "float too large to pack with f format");
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2145 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
2146 }
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2147
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2148 int
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2149 _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
2150 {
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2151 if (double_format == unknown_format) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2152 unsigned char sign;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2153 int e;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2154 double f;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2155 unsigned int fhi, flo;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2156 int incr = 1;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2157
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2158 if (le) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2159 p += 7;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2160 incr = -1;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2161 }
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2162
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2163 if (x < 0) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2164 sign = 1;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2165 x = -x;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2166 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2167 else
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2168 sign = 0;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2169
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2170 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
2171
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2172 /* Normalize f to be in the range [1.0, 2.0) */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2173 if (0.5 <= f && f < 1.0) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2174 f *= 2.0;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2175 e--;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2176 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2177 else if (f == 0.0)
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2178 e = 0;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2179 else {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2180 PyErr_SetString(PyExc_SystemError,
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2181 "frexp() result out of range");
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2182 return -1;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2183 }
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2184
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2185 if (e >= 1024)
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2186 goto Overflow;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2187 else if (e < -1022) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2188 /* Gradual underflow */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2189 f = ldexp(f, 1022 + e);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2190 e = 0;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2191 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2192 else if (!(e == 0 && f == 0.0)) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2193 e += 1023;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2194 f -= 1.0; /* Get rid of leading 1 */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2195 }
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2196
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2197 /* fhi receives the high 28 bits; flo the low 24 bits (== 52 bits) */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2198 f *= 268435456.0; /* 2**28 */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2199 fhi = (unsigned int)f; /* Truncate */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2200 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
2201
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2202 f -= (double)fhi;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2203 f *= 16777216.0; /* 2**24 */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2204 flo = (unsigned int)(f + 0.5); /* Round */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2205 assert(flo <= 16777216);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2206 if (flo >> 24) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2207 /* The carry propagated out of a string of 24 1 bits. */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2208 flo = 0;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2209 ++fhi;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2210 if (fhi >> 28) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2211 /* And it also progagated out of the next 28 bits. */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2212 fhi = 0;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2213 ++e;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2214 if (e >= 2047)
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2215 goto Overflow;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2216 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2217 }
28335
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2218
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2219 /* First byte */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2220 *p = (sign << 7) | (e >> 4);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2221 p += incr;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2222
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2223 /* Second byte */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2224 *p = (unsigned char) (((e & 0xF) << 4) | (fhi >> 24));
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2225 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
2226
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2227 /* Third byte */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2228 *p = (fhi >> 16) & 0xFF;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2229 p += incr;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2230
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2231 /* Fourth byte */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2232 *p = (fhi >> 8) & 0xFF;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2233 p += incr;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2234
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2235 /* Fifth byte */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2236 *p = fhi & 0xFF;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2237 p += incr;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2238
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2239 /* Sixth byte */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2240 *p = (flo >> 16) & 0xFF;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2241 p += incr;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2242
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2243 /* Seventh byte */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2244 *p = (flo >> 8) & 0xFF;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2245 p += incr;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2246
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2247 /* Eighth byte */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2248 *p = flo & 0xFF;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2249 p += incr;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2250
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2251 /* Done */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2252 return 0;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2253
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2254 Overflow:
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2255 PyErr_SetString(PyExc_OverflowError,
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2256 "float too large to pack with d format");
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2257 return -1;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2258 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2259 else {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2260 const char *s = (char*)&x;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2261 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
2262
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2263 if ((double_format == ieee_little_endian_format && !le)
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2264 || (double_format == ieee_big_endian_format && le)) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2265 p += 7;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2266 incr = -1;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2267 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2268
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2269 for (i = 0; i < 8; i++) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2270 *p = *s++;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2271 p += incr;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2272 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2273 return 0;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2274 }
28335
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2275 }
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2276
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2277 double
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2278 _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
2279 {
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2280 if (float_format == unknown_format) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2281 unsigned char sign;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2282 int e;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2283 unsigned int f;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2284 double x;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2285 int incr = 1;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2286
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2287 if (le) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2288 p += 3;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2289 incr = -1;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2290 }
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2291
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2292 /* First byte */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2293 sign = (*p >> 7) & 1;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2294 e = (*p & 0x7F) << 1;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2295 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
2296
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2297 /* Second byte */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2298 e |= (*p >> 7) & 1;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2299 f = (*p & 0x7F) << 16;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2300 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
2301
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2302 if (e == 255) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2303 PyErr_SetString(
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2304 PyExc_ValueError,
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2305 "can't unpack IEEE 754 special value "
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2306 "on non-IEEE platform");
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2307 return -1;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2308 }
28335
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2309
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2310 /* Third byte */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2311 f |= *p << 8;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2312 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
2313
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2314 /* Fourth byte */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2315 f |= *p;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2316
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2317 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
2318
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2319 /* XXX This sadly ignores Inf/NaN issues */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2320 if (e == 0)
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2321 e = -126;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2322 else {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2323 x += 1.0;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2324 e -= 127;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2325 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2326 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
2327
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2328 if (sign)
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2329 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
2330
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2331 return x;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2332 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2333 else {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2334 float x;
35987
8eda1a58a490 Fix bug
Michael W. Hudson <mwh@python.net>
parents: 35178
diff changeset
2335
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2336 if ((float_format == ieee_little_endian_format && !le)
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2337 || (float_format == ieee_big_endian_format && le)) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2338 char buf[4];
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2339 char *d = &buf[3];
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2340 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
2341
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2342 for (i = 0; i < 4; i++) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2343 *d-- = *p++;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2344 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2345 memcpy(&x, buf, 4);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2346 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2347 else {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2348 memcpy(&x, p, 4);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2349 }
35987
8eda1a58a490 Fix bug
Michael W. Hudson <mwh@python.net>
parents: 35178
diff changeset
2350
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2351 return x;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2352 }
28335
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2353 }
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2354
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2355 double
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2356 _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
2357 {
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2358 if (double_format == unknown_format) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2359 unsigned char sign;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2360 int e;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2361 unsigned int fhi, flo;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2362 double x;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2363 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
2364
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2365 if (le) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2366 p += 7;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2367 incr = -1;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2368 }
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2369
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2370 /* First byte */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2371 sign = (*p >> 7) & 1;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2372 e = (*p & 0x7F) << 4;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2373
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2374 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
2375
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2376 /* Second byte */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2377 e |= (*p >> 4) & 0xF;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2378 fhi = (*p & 0xF) << 24;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2379 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
2380
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2381 if (e == 2047) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2382 PyErr_SetString(
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2383 PyExc_ValueError,
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2384 "can't unpack IEEE 754 special value "
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2385 "on non-IEEE platform");
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2386 return -1.0;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2387 }
28335
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2388
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2389 /* Third byte */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2390 fhi |= *p << 16;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2391 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
2392
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2393 /* Fourth byte */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2394 fhi |= *p << 8;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2395 p += incr;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2396
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2397 /* Fifth byte */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2398 fhi |= *p;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2399 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
2400
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2401 /* Sixth byte */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2402 flo = *p << 16;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2403 p += incr;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2404
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2405 /* Seventh byte */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2406 flo |= *p << 8;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2407 p += incr;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2408
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2409 /* Eighth byte */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2410 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
2411
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2412 x = (double)fhi + (double)flo / 16777216.0; /* 2**24 */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2413 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
2414
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2415 if (e == 0)
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2416 e = -1022;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2417 else {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2418 x += 1.0;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2419 e -= 1023;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2420 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2421 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
2422
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2423 if (sign)
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2424 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
2425
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2426 return x;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2427 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2428 else {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2429 double x;
35987
8eda1a58a490 Fix bug
Michael W. Hudson <mwh@python.net>
parents: 35178
diff changeset
2430
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2431 if ((double_format == ieee_little_endian_format && !le)
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2432 || (double_format == ieee_big_endian_format && le)) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2433 char buf[8];
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2434 char *d = &buf[7];
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2435 int i;
35987
8eda1a58a490 Fix bug
Michael W. Hudson <mwh@python.net>
parents: 35178
diff changeset
2436
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2437 for (i = 0; i < 8; i++) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2438 *d-- = *p++;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2439 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2440 memcpy(&x, buf, 8);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2441 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2442 else {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2443 memcpy(&x, p, 8);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2444 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2445
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2446 return x;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2447 }
28335
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2448 }