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annotate Objects/floatobject.c @ 64282:aefba899eaee

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Disable deletion of openssl again.
author Martin v. Löwis <martin@v.loewis.de>
date Wed, 25 Aug 2010 22:15:18 +0000
parents eafe07d40eb7
children e8969fb822fc
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1
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2 /* Float object implementation */
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4 /* XXX There should be overflow checks here, but it's hard to check
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5 for any kind of float exception without losing portability. */
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6
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7 #include "Python.h"
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8 #include "structseq.h"
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9
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10 #include <ctype.h>
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11 #include <float.h>
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13 #undef MAX
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14 #undef MIN
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15 #define MAX(x, y) ((x) < (y) ? (y) : (x))
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16 #define MIN(x, y) ((x) < (y) ? (x) : (y))
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19 #ifdef _OSF_SOURCE
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20 /* OSF1 5.1 doesn't make this available with XOPEN_SOURCE_EXTENDED defined */
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21 extern int finite(double);
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22 #endif
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23
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24 /* Special free list
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26 Since some Python programs can spend much of their time allocating
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27 and deallocating floats, these operations should be very fast.
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28 Therefore we use a dedicated allocation scheme with a much lower
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29 overhead (in space and time) than straight malloc(): a simple
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30 dedicated free list, filled when necessary with memory from malloc().
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31
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32 block_list is a singly-linked list of all PyFloatBlocks ever allocated,
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33 linked via their next members. PyFloatBlocks are never returned to the
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34 system before shutdown (PyFloat_Fini).
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36 free_list is a singly-linked list of available PyFloatObjects, linked
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37 via abuse of their ob_type members.
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38 */
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39
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40 #define BLOCK_SIZE 1000 /* 1K less typical malloc overhead */
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41 #define BHEAD_SIZE 8 /* Enough for a 64-bit pointer */
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42 #define N_FLOATOBJECTS ((BLOCK_SIZE - BHEAD_SIZE) / sizeof(PyFloatObject))
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43
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44 struct _floatblock {
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45 struct _floatblock *next;
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46 PyFloatObject objects[N_FLOATOBJECTS];
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47 };
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49 typedef struct _floatblock PyFloatBlock;
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50
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51 static PyFloatBlock *block_list = NULL;
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52 static PyFloatObject *free_list = NULL;
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53
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54 static PyFloatObject *
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55 fill_free_list(void)
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56 {
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57 PyFloatObject *p, *q;
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58 /* XXX Float blocks escape the object heap. Use PyObject_MALLOC ??? */
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59 p = (PyFloatObject *) PyMem_MALLOC(sizeof(PyFloatBlock));
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60 if (p == NULL)
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61 return (PyFloatObject *) PyErr_NoMemory();
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62 ((PyFloatBlock *)p)->next = block_list;
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63 block_list = (PyFloatBlock *)p;
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64 p = &((PyFloatBlock *)p)->objects[0];
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65 q = p + N_FLOATOBJECTS;
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66 while (--q > p)
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67 Py_TYPE(q) = (struct _typeobject *)(q-1);
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68 Py_TYPE(q) = NULL;
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69 return p + N_FLOATOBJECTS - 1;
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70 }
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71
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72 double
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73 PyFloat_GetMax(void)
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74 {
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75 return DBL_MAX;
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76 }
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77
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78 double
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79 PyFloat_GetMin(void)
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80 {
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81 return DBL_MIN;
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82 }
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83
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84 static PyTypeObject FloatInfoType;
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85
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86 PyDoc_STRVAR(floatinfo__doc__,
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87 "sys.float_info\n\
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88 \n\
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89 A structseq holding information about the float type. It contains low level\n\
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90 information about the precision and internal representation. Please study\n\
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91 your system's :file:`float.h` for more information.");
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92
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93 static PyStructSequence_Field floatinfo_fields[] = {
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94 {"max", "DBL_MAX -- maximum representable finite float"},
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95 {"max_exp", "DBL_MAX_EXP -- maximum int e such that radix**(e-1) "
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96 "is representable"},
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97 {"max_10_exp", "DBL_MAX_10_EXP -- maximum int e such that 10**e "
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98 "is representable"},
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99 {"min", "DBL_MIN -- Minimum positive normalizer float"},
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100 {"min_exp", "DBL_MIN_EXP -- minimum int e such that radix**(e-1) "
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101 "is a normalized float"},
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102 {"min_10_exp", "DBL_MIN_10_EXP -- minimum int e such that 10**e is "
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103 "a normalized"},
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104 {"dig", "DBL_DIG -- digits"},
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105 {"mant_dig", "DBL_MANT_DIG -- mantissa digits"},
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106 {"epsilon", "DBL_EPSILON -- Difference between 1 and the next "
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107 "representable float"},
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108 {"radix", "FLT_RADIX -- radix of exponent"},
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109 {"rounds", "FLT_ROUNDS -- addition rounds"},
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110 {0}
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111 };
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112
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113 static PyStructSequence_Desc floatinfo_desc = {
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114 "sys.float_info", /* name */
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115 floatinfo__doc__, /* doc */
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116 floatinfo_fields, /* fields */
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117 11
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118 };
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119
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120 PyObject *
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121 PyFloat_GetInfo(void)
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122 {
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123 PyObject* floatinfo;
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124 int pos = 0;
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125
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126 floatinfo = PyStructSequence_New(&FloatInfoType);
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127 if (floatinfo == NULL) {
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128 return NULL;
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129 }
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130
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131 #define SetIntFlag(flag) \
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132 PyStructSequence_SET_ITEM(floatinfo, pos++, PyLong_FromLong(flag))
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133 #define SetDblFlag(flag) \
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134 PyStructSequence_SET_ITEM(floatinfo, pos++, PyFloat_FromDouble(flag))
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135
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136 SetDblFlag(DBL_MAX);
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137 SetIntFlag(DBL_MAX_EXP);
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138 SetIntFlag(DBL_MAX_10_EXP);
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139 SetDblFlag(DBL_MIN);
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140 SetIntFlag(DBL_MIN_EXP);
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141 SetIntFlag(DBL_MIN_10_EXP);
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142 SetIntFlag(DBL_DIG);
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143 SetIntFlag(DBL_MANT_DIG);
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144 SetDblFlag(DBL_EPSILON);
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145 SetIntFlag(FLT_RADIX);
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146 SetIntFlag(FLT_ROUNDS);
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147 #undef SetIntFlag
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148 #undef SetDblFlag
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149
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150 if (PyErr_Occurred()) {
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151 Py_CLEAR(floatinfo);
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152 return NULL;
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153 }
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154 return floatinfo;
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155 }
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156
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157 PyObject *
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158 PyFloat_FromDouble(double fval)
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159 {
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160 register PyFloatObject *op;
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161 if (free_list == NULL) {
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162 if ((free_list = fill_free_list()) == NULL)
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163 return NULL;
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164 }
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165 /* Inline PyObject_New */
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166 op = free_list;
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167 free_list = (PyFloatObject *)Py_TYPE(op);
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168 PyObject_INIT(op, &PyFloat_Type);
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169 op->ob_fval = fval;
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170 return (PyObject *) op;
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171 }
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172
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173 PyObject *
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174 PyFloat_FromString(PyObject *v)
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175 {
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176 const char *s, *last, *end;
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177 double x;
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178 char buffer[256]; /* for errors */
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179 char *s_buffer = NULL;
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180 Py_ssize_t len;
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181 PyObject *result = NULL;
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182
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183 if (PyUnicode_Check(v)) {
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184 s_buffer = (char *)PyMem_MALLOC(PyUnicode_GET_SIZE(v)+1);
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185 if (s_buffer == NULL)
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186 return PyErr_NoMemory();
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187 if (PyUnicode_EncodeDecimal(PyUnicode_AS_UNICODE(v),
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188 PyUnicode_GET_SIZE(v),
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189 s_buffer,
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190 NULL))
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191 goto error;
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192 s = s_buffer;
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193 len = strlen(s);
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194 }
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195 else if (PyObject_AsCharBuffer(v, &s, &len)) {
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196 PyErr_SetString(PyExc_TypeError,
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197 "float() argument must be a string or a number");
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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 while (Py_ISSPACE(*s))
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203 s++;
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204 /* We don't care about overflow or underflow. If the platform
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205 * supports them, infinities and signed zeroes (on underflow) are
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206 * fine. */
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207 x = PyOS_string_to_double(s, (char **)&end, NULL);
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208 if (x == -1.0 && PyErr_Occurred())
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209 goto error;
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210 while (Py_ISSPACE(*end))
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211 end++;
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212 if (end == last)
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213 result = PyFloat_FromDouble(x);
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214 else {
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215 PyOS_snprintf(buffer, sizeof(buffer),
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216 "invalid literal for float(): %.200s", s);
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217 PyErr_SetString(PyExc_ValueError, buffer);
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218 result = NULL;
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219 }
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220
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221 error:
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222 if (s_buffer)
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223 PyMem_FREE(s_buffer);
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224 return result;
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225 }
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226
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227 static void
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228 float_dealloc(PyFloatObject *op)
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229 {
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230 if (PyFloat_CheckExact(op)) {
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231 Py_TYPE(op) = (struct _typeobject *)free_list;
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232 free_list = op;
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233 }
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234 else
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235 Py_TYPE(op)->tp_free((PyObject *)op);
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236 }
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237
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238 double
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239 PyFloat_AsDouble(PyObject *op)
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240 {
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241 PyNumberMethods *nb;
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242 PyFloatObject *fo;
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243 double val;
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244
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245 if (op && PyFloat_Check(op))
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246 return PyFloat_AS_DOUBLE((PyFloatObject*) op);
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247
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248 if (op == NULL) {
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249 PyErr_BadArgument();
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250 return -1;
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251 }
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252
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253 if ((nb = Py_TYPE(op)->tp_as_number) == NULL || nb->nb_float == NULL) {
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254 PyErr_SetString(PyExc_TypeError, "a float is required");
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255 return -1;
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256 }
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257
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258 fo = (PyFloatObject*) (*nb->nb_float) (op);
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259 if (fo == NULL)
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260 return -1;
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261 if (!PyFloat_Check(fo)) {
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262 PyErr_SetString(PyExc_TypeError,
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263 "nb_float should return float object");
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264 return -1;
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265 }
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266
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267 val = PyFloat_AS_DOUBLE(fo);
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268 Py_DECREF(fo);
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269
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270 return val;
6
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271 }
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272
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273 /* Macro and helper that convert PyObject obj to a C double and store
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274 the value in dbl. If conversion to double raises an exception, obj is
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275 set to NULL, and the function invoking this macro returns NULL. If
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276 obj is not of float, int or long type, Py_NotImplemented is incref'ed,
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277 stored in obj, and returned from the function invoking this macro.
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278 */
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279 #define CONVERT_TO_DOUBLE(obj, dbl) \
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280 if (PyFloat_Check(obj)) \
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281 dbl = PyFloat_AS_DOUBLE(obj); \
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282 else if (convert_to_double(&(obj), &(dbl)) < 0) \
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283 return obj;
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284
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285 /* Methods */
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286
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287 static int
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288 convert_to_double(PyObject **v, double *dbl)
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289 {
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290 register PyObject *obj = *v;
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291
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292 if (PyLong_Check(obj)) {
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293 *dbl = PyLong_AsDouble(obj);
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294 if (*dbl == -1.0 && PyErr_Occurred()) {
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295 *v = NULL;
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296 return -1;
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297 }
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298 }
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299 else {
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300 Py_INCREF(Py_NotImplemented);
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301 *v = Py_NotImplemented;
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302 return -1;
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303 }
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304 return 0;
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305 }
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306
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307 static PyObject *
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308 float_repr(PyFloatObject *v)
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309 {
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310 PyObject *result;
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311 char *buf = PyOS_double_to_string(PyFloat_AS_DOUBLE(v),
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312 'r', 0,
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c6376d3fa968 Issue #5920: Changed format.__float__ and complex.__float__ to use a precision of 12 when using the empty presentation type. This more closely matches str()'s behavior and reduces surprises when adding alignment flags to an empty format string. Patch by Mark Dickinson.
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313 Py_DTSF_ADD_DOT_0,
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314 NULL);
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315 if (!buf)
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316 return PyErr_NoMemory();
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317 result = PyUnicode_FromString(buf);
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318 PyMem_Free(buf);
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319 return result;
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320 }
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321
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322 /* Comparison is pretty much a nightmare. When comparing float to float,
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323 * we do it as straightforwardly (and long-windedly) as conceivable, so
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324 * that, e.g., Python x == y delivers the same result as the platform
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325 * C x == y when x and/or y is a NaN.
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326 * When mixing float with an integer type, there's no good *uniform* approach.
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327 * Converting the double to an integer obviously doesn't work, since we
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328 * may lose info from fractional bits. Converting the integer to a double
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329 * also has two failure modes: (1) a long int may trigger overflow (too
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330 * large to fit in the dynamic range of a C double); (2) even a C long may have
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331 * more bits than fit in a C double (e.g., on a a 64-bit box long may have
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332 * 63 bits of precision, but a C double probably has only 53), and then
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333 * we can falsely claim equality when low-order integer bits are lost by
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334 * coercion to double. So this part is painful too.
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335 */
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336
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337 static PyObject*
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338 float_richcompare(PyObject *v, PyObject *w, int op)
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339 {
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340 double i, j;
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341 int r = 0;
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342
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343 assert(PyFloat_Check(v));
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344 i = PyFloat_AS_DOUBLE(v);
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345
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346 /* Switch on the type of w. Set i and j to doubles to be compared,
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347 * and op to the richcomp to use.
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348 */
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349 if (PyFloat_Check(w))
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350 j = PyFloat_AS_DOUBLE(w);
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351
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352 else if (!Py_IS_FINITE(i)) {
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353 if (PyLong_Check(w))
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354 /* If i is an infinity, its magnitude exceeds any
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355 * finite integer, so it doesn't matter which int we
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356 * compare i with. If i is a NaN, similarly.
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357 */
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358 j = 0.0;
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359 else
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360 goto Unimplemented;
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361 }
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362
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363 else if (PyLong_Check(w)) {
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364 int vsign = i == 0.0 ? 0 : i < 0.0 ? -1 : 1;
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365 int wsign = _PyLong_Sign(w);
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366 size_t nbits;
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367 int exponent;
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368
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369 if (vsign != wsign) {
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370 /* Magnitudes are irrelevant -- the signs alone
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371 * determine the outcome.
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372 */
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373 i = (double)vsign;
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374 j = (double)wsign;
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375 goto Compare;
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376 }
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377 /* The signs are the same. */
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378 /* Convert w to a double if it fits. In particular, 0 fits. */
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379 nbits = _PyLong_NumBits(w);
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380 if (nbits == (size_t)-1 && PyErr_Occurred()) {
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381 /* This long is so large that size_t isn't big enough
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382 * to hold the # of bits. Replace with little doubles
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383 * that give the same outcome -- w is so large that
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384 * its magnitude must exceed the magnitude of any
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385 * finite float.
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386 */
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387 PyErr_Clear();
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388 i = (double)vsign;
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389 assert(wsign != 0);
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390 j = wsign * 2.0;
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391 goto Compare;
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392 }
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393 if (nbits <= 48) {
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394 j = PyLong_AsDouble(w);
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395 /* It's impossible that <= 48 bits overflowed. */
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396 assert(j != -1.0 || ! PyErr_Occurred());
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397 goto Compare;
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398 }
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diff changeset
399 assert(wsign != 0); /* else nbits was 0 */
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diff changeset
400 assert(vsign != 0); /* if vsign were 0, then since wsign is
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parents: 59014
diff changeset
401 * not 0, we would have taken the
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diff changeset
402 * vsign != wsign branch at the start */
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diff changeset
403 /* We want to work with non-negative numbers. */
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diff changeset
404 if (vsign < 0) {
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parents: 59014
diff changeset
405 /* "Multiply both sides" by -1; this also swaps the
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parents: 59014
diff changeset
406 * comparator.
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parents: 59014
diff changeset
407 */
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parents: 59014
diff changeset
408 i = -i;
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parents: 59014
diff changeset
409 op = _Py_SwappedOp[op];
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diff changeset
410 }
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diff changeset
411 assert(i > 0.0);
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diff changeset
412 (void) frexp(i, &exponent);
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diff changeset
413 /* exponent is the # of bits in v before the radix point;
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414 * we know that nbits (the # of bits in w) > 48 at this point
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diff changeset
415 */
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diff changeset
416 if (exponent < 0 || (size_t)exponent < nbits) {
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parents: 59014
diff changeset
417 i = 1.0;
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diff changeset
418 j = 2.0;
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diff changeset
419 goto Compare;
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diff changeset
420 }
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421 if ((size_t)exponent > nbits) {
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422 i = 2.0;
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423 j = 1.0;
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diff changeset
424 goto Compare;
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diff changeset
425 }
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426 /* v and w have the same number of bits before the radix
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427 * point. Construct two longs that have the same comparison
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diff changeset
428 * outcome.
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diff changeset
429 */
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diff changeset
430 {
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diff changeset
431 double fracpart;
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parents: 59014
diff changeset
432 double intpart;
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parents: 59014
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433 PyObject *result = NULL;
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434 PyObject *one = NULL;
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435 PyObject *vv = NULL;
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Antoine Pitrou <solipsis@pitrou.net>
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diff changeset
436 PyObject *ww = w;
33547
702367da2c72 SF bug #513866: Float/long comparison anomaly.
Tim Peters <tim.peters@gmail.com>
parents: 32533
diff changeset
437
61466
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diff changeset
438 if (wsign < 0) {
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Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
439 ww = PyNumber_Negative(w);
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diff changeset
440 if (ww == NULL)
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diff changeset
441 goto Error;
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diff changeset
442 }
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443 else
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444 Py_INCREF(ww);
33547
702367da2c72 SF bug #513866: Float/long comparison anomaly.
Tim Peters <tim.peters@gmail.com>
parents: 32533
diff changeset
445
61466
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446 fracpart = modf(i, &intpart);
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diff changeset
447 vv = PyLong_FromDouble(intpart);
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diff changeset
448 if (vv == NULL)
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diff changeset
449 goto Error;
33547
702367da2c72 SF bug #513866: Float/long comparison anomaly.
Tim Peters <tim.peters@gmail.com>
parents: 32533
diff changeset
450
61466
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diff changeset
451 if (fracpart != 0.0) {
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parents: 59014
diff changeset
452 /* Shift left, and or a 1 bit into vv
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diff changeset
453 * to represent the lost fraction.
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diff changeset
454 */
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diff changeset
455 PyObject *temp;
33547
702367da2c72 SF bug #513866: Float/long comparison anomaly.
Tim Peters <tim.peters@gmail.com>
parents: 32533
diff changeset
456
61466
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diff changeset
457 one = PyLong_FromLong(1);
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diff changeset
458 if (one == NULL)
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diff changeset
459 goto Error;
33547
702367da2c72 SF bug #513866: Float/long comparison anomaly.
Tim Peters <tim.peters@gmail.com>
parents: 32533
diff changeset
460
61466
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diff changeset
461 temp = PyNumber_Lshift(ww, one);
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462 if (temp == NULL)
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463 goto Error;
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464 Py_DECREF(ww);
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diff changeset
465 ww = temp;
33547
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Tim Peters <tim.peters@gmail.com>
parents: 32533
diff changeset
466
61466
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467 temp = PyNumber_Lshift(vv, one);
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diff changeset
468 if (temp == NULL)
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diff changeset
469 goto Error;
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diff changeset
470 Py_DECREF(vv);
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diff changeset
471 vv = temp;
33547
702367da2c72 SF bug #513866: Float/long comparison anomaly.
Tim Peters <tim.peters@gmail.com>
parents: 32533
diff changeset
472
61466
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diff changeset
473 temp = PyNumber_Or(vv, one);
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diff changeset
474 if (temp == NULL)
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diff changeset
475 goto Error;
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diff changeset
476 Py_DECREF(vv);
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diff changeset
477 vv = temp;
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diff changeset
478 }
33547
702367da2c72 SF bug #513866: Float/long comparison anomaly.
Tim Peters <tim.peters@gmail.com>
parents: 32533
diff changeset
479
61466
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480 r = PyObject_RichCompareBool(vv, ww, op);
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diff changeset
481 if (r < 0)
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diff changeset
482 goto Error;
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diff changeset
483 result = PyBool_FromLong(r);
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parents: 59014
diff changeset
484 Error:
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diff changeset
485 Py_XDECREF(vv);
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diff changeset
486 Py_XDECREF(ww);
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diff changeset
487 Py_XDECREF(one);
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diff changeset
488 return result;
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parents: 59014
diff changeset
489 }
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diff changeset
490 } /* else if (PyLong_Check(w)) */
33547
702367da2c72 SF bug #513866: Float/long comparison anomaly.
Tim Peters <tim.peters@gmail.com>
parents: 32533
diff changeset
491
61466
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diff changeset
492 else /* w isn't float, int, or long */
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diff changeset
493 goto Unimplemented;
33547
702367da2c72 SF bug #513866: Float/long comparison anomaly.
Tim Peters <tim.peters@gmail.com>
parents: 32533
diff changeset
494
702367da2c72 SF bug #513866: Float/long comparison anomaly.
Tim Peters <tim.peters@gmail.com>
parents: 32533
diff changeset
495 Compare:
61466
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diff changeset
496 PyFPE_START_PROTECT("richcompare", return NULL)
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parents: 59014
diff changeset
497 switch (op) {
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diff changeset
498 case Py_EQ:
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parents: 59014
diff changeset
499 r = i == j;
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parents: 59014
diff changeset
500 break;
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parents: 59014
diff changeset
501 case Py_NE:
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parents: 59014
diff changeset
502 r = i != j;
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parents: 59014
diff changeset
503 break;
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parents: 59014
diff changeset
504 case Py_LE:
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parents: 59014
diff changeset
505 r = i <= j;
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parents: 59014
diff changeset
506 break;
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parents: 59014
diff changeset
507 case Py_GE:
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parents: 59014
diff changeset
508 r = i >= j;
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parents: 59014
diff changeset
509 break;
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parents: 59014
diff changeset
510 case Py_LT:
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parents: 59014
diff changeset
511 r = i < j;
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parents: 59014
diff changeset
512 break;
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parents: 59014
diff changeset
513 case Py_GT:
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parents: 59014
diff changeset
514 r = i > j;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
515 break;
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parents: 59014
diff changeset
516 }
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parents: 59014
diff changeset
517 PyFPE_END_PROTECT(r)
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diff changeset
518 return PyBool_FromLong(r);
33547
702367da2c72 SF bug #513866: Float/long comparison anomaly.
Tim Peters <tim.peters@gmail.com>
parents: 32533
diff changeset
519
702367da2c72 SF bug #513866: Float/long comparison anomaly.
Tim Peters <tim.peters@gmail.com>
parents: 32533
diff changeset
520 Unimplemented:
61466
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diff changeset
521 Py_INCREF(Py_NotImplemented);
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diff changeset
522 return Py_NotImplemented;
31553
a6d8d5ace6a7 "Fix" (for certain configurations of the planets, including
Michael W. Hudson <mwh@python.net>
parents: 31384
diff changeset
523 }
a6d8d5ace6a7 "Fix" (for certain configurations of the planets, including
Michael W. Hudson <mwh@python.net>
parents: 31384
diff changeset
524
1257
1cabc2b6c970 * Changed all copyright messages to include 1993.
Guido van Rossum <guido@python.org>
parents: 1252
diff changeset
525 static long
13454
fcc75a3748f5 ANSI-fication of the sources.
Fred Drake <fdrake@acm.org>
parents: 13447
diff changeset
526 float_hash(PyFloatObject *v)
1257
1cabc2b6c970 * Changed all copyright messages to include 1993.
Guido van Rossum <guido@python.org>
parents: 1252
diff changeset
527 {
61466
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Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
528 return _Py_HashDouble(v->ob_fval);
1257
1cabc2b6c970 * Changed all copyright messages to include 1993.
Guido van Rossum <guido@python.org>
parents: 1252
diff changeset
529 }
1cabc2b6c970 * Changed all copyright messages to include 1993.
Guido van Rossum <guido@python.org>
parents: 1252
diff changeset
530
5396
d1447950fa04 Quickly renamed the last directory.
Guido van Rossum <guido@python.org>
parents: 5197
diff changeset
531 static PyObject *
15723
ac7ae3ead88a Make float a new style number type.
Neil Schemenauer <nascheme@enme.ucalgary.ca>
parents: 15318
diff changeset
532 float_add(PyObject *v, PyObject *w)
6
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
533 {
61466
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parents: 59014
diff changeset
534 double a,b;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
535 CONVERT_TO_DOUBLE(v, a);
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536 CONVERT_TO_DOUBLE(w, b);
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537 PyFPE_START_PROTECT("add", return 0)
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538 a = a + b;
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539 PyFPE_END_PROTECT(a)
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540 return PyFloat_FromDouble(a);
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541 }
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542
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543 static PyObject *
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544 float_sub(PyObject *v, PyObject *w)
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545 {
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546 double a,b;
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547 CONVERT_TO_DOUBLE(v, a);
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548 CONVERT_TO_DOUBLE(w, b);
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549 PyFPE_START_PROTECT("subtract", return 0)
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550 a = a - b;
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551 PyFPE_END_PROTECT(a)
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552 return PyFloat_FromDouble(a);
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553 }
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554
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555 static PyObject *
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556 float_mul(PyObject *v, PyObject *w)
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557 {
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558 double a,b;
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559 CONVERT_TO_DOUBLE(v, a);
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560 CONVERT_TO_DOUBLE(w, b);
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561 PyFPE_START_PROTECT("multiply", return 0)
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562 a = a * b;
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563 PyFPE_END_PROTECT(a)
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564 return PyFloat_FromDouble(a);
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565 }
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566
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567 static PyObject *
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568 float_div(PyObject *v, PyObject *w)
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569 {
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570 double a,b;
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571 CONVERT_TO_DOUBLE(v, a);
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572 CONVERT_TO_DOUBLE(w, b);
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573 #ifdef Py_NAN
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574 if (b == 0.0) {
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575 PyErr_SetString(PyExc_ZeroDivisionError,
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576 "float division by zero");
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577 return NULL;
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578 }
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579 #endif
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580 PyFPE_START_PROTECT("divide", return 0)
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581 a = a / b;
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582 PyFPE_END_PROTECT(a)
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583 return PyFloat_FromDouble(a);
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584 }
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585
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586 static PyObject *
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587 float_rem(PyObject *v, PyObject *w)
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588 {
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589 double vx, wx;
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590 double mod;
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591 CONVERT_TO_DOUBLE(v, vx);
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592 CONVERT_TO_DOUBLE(w, wx);
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593 #ifdef Py_NAN
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594 if (wx == 0.0) {
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595 PyErr_SetString(PyExc_ZeroDivisionError,
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596 "float modulo");
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597 return NULL;
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598 }
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599 #endif
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600 PyFPE_START_PROTECT("modulo", return 0)
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601 mod = fmod(vx, wx);
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602 /* note: checking mod*wx < 0 is incorrect -- underflows to
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603 0 if wx < sqrt(smallest nonzero double) */
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604 if (mod && ((wx < 0) != (mod < 0))) {
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605 mod += wx;
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606 }
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607 PyFPE_END_PROTECT(mod)
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608 return PyFloat_FromDouble(mod);
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609 }
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610
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611 static PyObject *
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612 float_divmod(PyObject *v, PyObject *w)
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613 {
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614 double vx, wx;
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615 double div, mod, floordiv;
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616 CONVERT_TO_DOUBLE(v, vx);
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617 CONVERT_TO_DOUBLE(w, wx);
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618 if (wx == 0.0) {
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619 PyErr_SetString(PyExc_ZeroDivisionError, "float divmod()");
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620 return NULL;
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621 }
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622 PyFPE_START_PROTECT("divmod", return 0)
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623 mod = fmod(vx, wx);
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624 /* fmod is typically exact, so vx-mod is *mathematically* an
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625 exact multiple of wx. But this is fp arithmetic, and fp
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626 vx - mod is an approximation; the result is that div may
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627 not be an exact integral value after the division, although
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628 it will always be very close to one.
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629 */
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630 div = (vx - mod) / wx;
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631 if (mod) {
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632 /* ensure the remainder has the same sign as the denominator */
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633 if ((wx < 0) != (mod < 0)) {
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634 mod += wx;
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635 div -= 1.0;
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636 }
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637 }
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638 else {
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639 /* the remainder is zero, and in the presence of signed zeroes
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640 fmod returns different results across platforms; ensure
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641 it has the same sign as the denominator; we'd like to do
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642 "mod = wx * 0.0", but that may get optimized away */
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643 mod *= mod; /* hide "mod = +0" from optimizer */
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644 if (wx < 0.0)
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645 mod = -mod;
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646 }
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647 /* snap quotient to nearest integral value */
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648 if (div) {
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649 floordiv = floor(div);
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650 if (div - floordiv > 0.5)
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651 floordiv += 1.0;
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652 }
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653 else {
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654 /* div is zero - get the same sign as the true quotient */
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655 div *= div; /* hide "div = +0" from optimizers */
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656 floordiv = div * vx / wx; /* zero w/ sign of vx/wx */
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657 }
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658 PyFPE_END_PROTECT(floordiv)
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659 return Py_BuildValue("(dd)", floordiv, mod);
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660 }
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661
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662 static PyObject *
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663 float_floor_div(PyObject *v, PyObject *w)
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664 {
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665 PyObject *t, *r;
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666
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667 t = float_divmod(v, w);
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668 if (t == NULL || t == Py_NotImplemented)
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669 return t;
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670 assert(PyTuple_CheckExact(t));
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671 r = PyTuple_GET_ITEM(t, 0);
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672 Py_INCREF(r);
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673 Py_DECREF(t);
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674 return r;
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675 }
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676
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677 /* determine whether x is an odd integer or not; assumes that
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678 x is not an infinity or nan. */
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679 #define DOUBLE_IS_ODD_INTEGER(x) (fmod(fabs(x), 2.0) == 1.0)
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680
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681 static PyObject *
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682 float_pow(PyObject *v, PyObject *w, PyObject *z)
6
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683 {
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684 double iv, iw, ix;
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685 int negate_result = 0;
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686
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687 if ((PyObject *)z != Py_None) {
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688 PyErr_SetString(PyExc_TypeError, "pow() 3rd argument not "
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689 "allowed unless all arguments are integers");
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690 return NULL;
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691 }
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692
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693 CONVERT_TO_DOUBLE(v, iv);
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694 CONVERT_TO_DOUBLE(w, iw);
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695
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696 /* Sort out special cases here instead of relying on pow() */
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697 if (iw == 0) { /* v**0 is 1, even 0**0 */
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698 return PyFloat_FromDouble(1.0);
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699 }
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700 if (Py_IS_NAN(iv)) { /* nan**w = nan, unless w == 0 */
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701 return PyFloat_FromDouble(iv);
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702 }
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703 if (Py_IS_NAN(iw)) { /* v**nan = nan, unless v == 1; 1**nan = 1 */
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704 return PyFloat_FromDouble(iv == 1.0 ? 1.0 : iw);
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705 }
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706 if (Py_IS_INFINITY(iw)) {
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707 /* v**inf is: 0.0 if abs(v) < 1; 1.0 if abs(v) == 1; inf if
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708 * abs(v) > 1 (including case where v infinite)
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709 *
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710 * v**-inf is: inf if abs(v) < 1; 1.0 if abs(v) == 1; 0.0 if
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711 * abs(v) > 1 (including case where v infinite)
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712 */
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713 iv = fabs(iv);
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714 if (iv == 1.0)
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715 return PyFloat_FromDouble(1.0);
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716 else if ((iw > 0.0) == (iv > 1.0))
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717 return PyFloat_FromDouble(fabs(iw)); /* return inf */
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718 else
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719 return PyFloat_FromDouble(0.0);
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720 }
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721 if (Py_IS_INFINITY(iv)) {
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722 /* (+-inf)**w is: inf for w positive, 0 for w negative; in
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723 * both cases, we need to add the appropriate sign if w is
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724 * an odd integer.
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725 */
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726 int iw_is_odd = DOUBLE_IS_ODD_INTEGER(iw);
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727 if (iw > 0.0)
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728 return PyFloat_FromDouble(iw_is_odd ? iv : fabs(iv));
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729 else
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730 return PyFloat_FromDouble(iw_is_odd ?
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731 copysign(0.0, iv) : 0.0);
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732 }
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733 if (iv == 0.0) { /* 0**w is: 0 for w positive, 1 for w zero
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734 (already dealt with above), and an error
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735 if w is negative. */
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736 int iw_is_odd = DOUBLE_IS_ODD_INTEGER(iw);
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737 if (iw < 0.0) {
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738 PyErr_SetString(PyExc_ZeroDivisionError,
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739 "0.0 cannot be raised to a "
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740 "negative power");
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741 return NULL;
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742 }
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743 /* use correct sign if iw is odd */
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744 return PyFloat_FromDouble(iw_is_odd ? iv : 0.0);
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745 }
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746
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747 if (iv < 0.0) {
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748 /* Whether this is an error is a mess, and bumps into libm
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749 * bugs so we have to figure it out ourselves.
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750 */
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751 if (iw != floor(iw)) {
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752 /* Negative numbers raised to fractional powers
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753 * become complex.
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754 */
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755 return PyComplex_Type.tp_as_number->nb_power(v, w, z);
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756 }
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757 /* iw is an exact integer, albeit perhaps a very large
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758 * one. Replace iv by its absolute value and remember
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759 * to negate the pow result if iw is odd.
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760 */
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761 iv = -iv;
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762 negate_result = DOUBLE_IS_ODD_INTEGER(iw);
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763 }
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764
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765 if (iv == 1.0) { /* 1**w is 1, even 1**inf and 1**nan */
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766 /* (-1) ** large_integer also ends up here. Here's an
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767 * extract from the comments for the previous
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768 * implementation explaining why this special case is
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769 * necessary:
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770 *
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771 * -1 raised to an exact integer should never be exceptional.
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772 * Alas, some libms (chiefly glibc as of early 2003) return
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773 * NaN and set EDOM on pow(-1, large_int) if the int doesn't
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774 * happen to be representable in a *C* integer. That's a
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775 * bug.
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776 */
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777 return PyFloat_FromDouble(negate_result ? -1.0 : 1.0);
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778 }
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779
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780 /* Now iv and iw are finite, iw is nonzero, and iv is
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781 * positive and not equal to 1.0. We finally allow
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782 * the platform pow to step in and do the rest.
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783 */
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784 errno = 0;
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785 PyFPE_START_PROTECT("pow", return NULL)
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786 ix = pow(iv, iw);
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787 PyFPE_END_PROTECT(ix)
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788 Py_ADJUST_ERANGE1(ix);
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789 if (negate_result)
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790 ix = -ix;
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791
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792 if (errno != 0) {
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793 /* We don't expect any errno value other than ERANGE, but
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794 * the range of libm bugs appears unbounded.
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795 */
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796 PyErr_SetFromErrno(errno == ERANGE ? PyExc_OverflowError :
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797 PyExc_ValueError);
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798 return NULL;
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799 }
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800 return PyFloat_FromDouble(ix);
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801 }
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802
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803 #undef DOUBLE_IS_ODD_INTEGER
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804
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805 static PyObject *
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806 float_neg(PyFloatObject *v)
6
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807 {
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808 return PyFloat_FromDouble(-v->ob_fval);
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809 }
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810
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811 static PyObject *
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812 float_abs(PyFloatObject *v)
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diff changeset
813 {
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814 return PyFloat_FromDouble(fabs(v->ob_fval));
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815 }
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816
239
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817 static int
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818 float_bool(PyFloatObject *v)
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819 {
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820 return v->ob_fval != 0.0;
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821 }
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822
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823 static PyObject *
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824 float_is_integer(PyObject *v)
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825 {
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826 double x = PyFloat_AsDouble(v);
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827 PyObject *o;
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828
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829 if (x == -1.0 && PyErr_Occurred())
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830 return NULL;
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831 if (!Py_IS_FINITE(x))
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832 Py_RETURN_FALSE;
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833 errno = 0;
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834 PyFPE_START_PROTECT("is_integer", return NULL)
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835 o = (floor(x) == x) ? Py_True : Py_False;
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836 PyFPE_END_PROTECT(x)
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837 if (errno != 0) {
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838 PyErr_SetFromErrno(errno == ERANGE ? PyExc_OverflowError :
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839 PyExc_ValueError);
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840 return NULL;
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841 }
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842 Py_INCREF(o);
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843 return o;
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844 }
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845
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846 #if 0
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847 static PyObject *
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848 float_is_inf(PyObject *v)
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849 {
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850 double x = PyFloat_AsDouble(v);
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851 if (x == -1.0 && PyErr_Occurred())
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852 return NULL;
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853 return PyBool_FromLong((long)Py_IS_INFINITY(x));
46477
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854 }
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855
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856 static PyObject *
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857 float_is_nan(PyObject *v)
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858 {
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859 double x = PyFloat_AsDouble(v);
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860 if (x == -1.0 && PyErr_Occurred())
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861 return NULL;
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862 return PyBool_FromLong((long)Py_IS_NAN(x));
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863 }
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864
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865 static PyObject *
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866 float_is_finite(PyObject *v)
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867 {
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868 double x = PyFloat_AsDouble(v);
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869 if (x == -1.0 && PyErr_Occurred())
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870 return NULL;
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871 return PyBool_FromLong((long)Py_IS_FINITE(x));
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872 }
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873 #endif
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874
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875 static PyObject *
42753
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876 float_trunc(PyObject *v)
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parents: 955
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877 {
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878 double x = PyFloat_AsDouble(v);
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879 double wholepart; /* integral portion of x, rounded toward 0 */
18838
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Tim Peters <tim.peters@gmail.com>
parents: 17707
diff changeset
880
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881 (void)modf(x, &wholepart);
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882 /* Try to get out cheap if this fits in a Python int. The attempt
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883 * to cast to long must be protected, as C doesn't define what
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884 * happens if the double is too big to fit in a long. Some rare
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885 * systems raise an exception then (RISCOS was mentioned as one,
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886 * and someone using a non-default option on Sun also bumped into
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887 * that). Note that checking for >= and <= LONG_{MIN,MAX} would
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888 * still be vulnerable: if a long has more bits of precision than
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889 * a double, casting MIN/MAX to double may yield an approximation,
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890 * and if that's rounded up, then, e.g., wholepart=LONG_MAX+1 would
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891 * yield true from the C expression wholepart<=LONG_MAX, despite
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892 * that wholepart is actually greater than LONG_MAX.
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893 */
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894 if (LONG_MIN < wholepart && wholepart < LONG_MAX) {
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diff changeset
895 const long aslong = (long)wholepart;
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896 return PyLong_FromLong(aslong);
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897 }
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898 return PyLong_FromDouble(wholepart);
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899 }
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900
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901 /* double_round: rounds a finite double to the closest multiple of
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902 10**-ndigits; here ndigits is within reasonable bounds (typically, -308 <=
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903 ndigits <= 323). Returns a Python float, or sets a Python error and
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904 returns NULL on failure (OverflowError and memory errors are possible). */
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905
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906 #ifndef PY_NO_SHORT_FLOAT_REPR
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907 /* version of double_round that uses the correctly-rounded string<->double
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908 conversions from Python/dtoa.c */
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909
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910 static PyObject *
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911 double_round(double x, int ndigits) {
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912
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913 double rounded;
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914 Py_ssize_t buflen, mybuflen=100;
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915 char *buf, *buf_end, shortbuf[100], *mybuf=shortbuf;
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916 int decpt, sign;
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917 PyObject *result = NULL;
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918
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919 /* round to a decimal string */
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920 buf = _Py_dg_dtoa(x, 3, ndigits, &decpt, &sign, &buf_end);
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921 if (buf == NULL) {
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922 PyErr_NoMemory();
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923 return NULL;
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924 }
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925
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926 /* Get new buffer if shortbuf is too small. Space needed <= buf_end -
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927 buf + 8: (1 extra for '0', 1 for sign, 5 for exp, 1 for '\0'). */
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928 buflen = buf_end - buf;
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929 if (buflen + 8 > mybuflen) {
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930 mybuflen = buflen+8;
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931 mybuf = (char *)PyMem_Malloc(mybuflen);
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diff changeset
932 if (mybuf == NULL) {
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diff changeset
933 PyErr_NoMemory();
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diff changeset
934 goto exit;
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diff changeset
935 }
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diff changeset
936 }
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diff changeset
937 /* copy buf to mybuf, adding exponent, sign and leading 0 */
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diff changeset
938 PyOS_snprintf(mybuf, mybuflen, "%s0%se%d", (sign ? "-" : ""),
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
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diff changeset
939 buf, decpt - (int)buflen);
53218
d43d64252d36 Issue #1869 (and 4707, 5118, 5473, 1456775): use the new
Mark Dickinson <dickinsm@gmail.com>
parents: 53187
diff changeset
940
61466
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diff changeset
941 /* and convert the resulting string back to a double */
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diff changeset
942 errno = 0;
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diff changeset
943 rounded = _Py_dg_strtod(mybuf, NULL);
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diff changeset
944 if (errno == ERANGE && fabs(rounded) >= 1.)
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diff changeset
945 PyErr_SetString(PyExc_OverflowError,
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diff changeset
946 "rounded value too large to represent");
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diff changeset
947 else
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diff changeset
948 result = PyFloat_FromDouble(rounded);
53218
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Mark Dickinson <dickinsm@gmail.com>
parents: 53187
diff changeset
949
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diff changeset
950 /* done computing value; now clean up */
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diff changeset
951 if (mybuf != shortbuf)
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diff changeset
952 PyMem_Free(mybuf);
53218
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diff changeset
953 exit:
61466
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954 _Py_dg_freedtoa(buf);
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diff changeset
955 return result;
53218
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diff changeset
956 }
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957
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958 #else /* PY_NO_SHORT_FLOAT_REPR */
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959
d43d64252d36 Issue #1869 (and 4707, 5118, 5473, 1456775): use the new
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diff changeset
960 /* 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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diff changeset
961 conversions aren't available */
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962
d43d64252d36 Issue #1869 (and 4707, 5118, 5473, 1456775): use the new
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diff changeset
963 static PyObject *
d43d64252d36 Issue #1869 (and 4707, 5118, 5473, 1456775): use the new
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diff changeset
964 double_round(double x, int ndigits) {
61466
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diff changeset
965 double pow1, pow2, y, z;
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966 if (ndigits >= 0) {
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967 if (ndigits > 22) {
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968 /* pow1 and pow2 are each safe from overflow, but
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969 pow1*pow2 ~= pow(10.0, ndigits) might overflow */
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970 pow1 = pow(10.0, (double)(ndigits-22));
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diff changeset
971 pow2 = 1e22;
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972 }
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973 else {
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974 pow1 = pow(10.0, (double)ndigits);
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diff changeset
975 pow2 = 1.0;
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976 }
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diff changeset
977 y = (x*pow1)*pow2;
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diff changeset
978 /* if y overflows, then rounded value is exactly x */
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diff changeset
979 if (!Py_IS_FINITE(y))
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980 return PyFloat_FromDouble(x);
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981 }
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982 else {
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983 pow1 = pow(10.0, (double)-ndigits);
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984 pow2 = 1.0; /* unused; silences a gcc compiler warning */
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985 y = x / pow1;
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986 }
53218
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987
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988 z = round(y);
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989 if (fabs(y-z) == 0.5)
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diff changeset
990 /* halfway between two integers; use round-half-even */
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diff changeset
991 z = 2.0*round(y/2.0);
53218
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992
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993 if (ndigits >= 0)
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994 z = (z / pow2) / pow1;
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995 else
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996 z *= pow1;
53218
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997
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998 /* if computation resulted in overflow, raise OverflowError */
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999 if (!Py_IS_FINITE(z)) {
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1000 PyErr_SetString(PyExc_OverflowError,
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diff changeset
1001 "overflow occurred during round");
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1002 return NULL;
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1003 }
53218
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1004
61466
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1005 return PyFloat_FromDouble(z);
53218
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diff changeset
1006 }
d43d64252d36 Issue #1869 (and 4707, 5118, 5473, 1456775): use the new
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diff changeset
1007
d43d64252d36 Issue #1869 (and 4707, 5118, 5473, 1456775): use the new
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diff changeset
1008 #endif /* PY_NO_SHORT_FLOAT_REPR */
d43d64252d36 Issue #1869 (and 4707, 5118, 5473, 1456775): use the new
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diff changeset
1009
d43d64252d36 Issue #1869 (and 4707, 5118, 5473, 1456775): use the new
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diff changeset
1010 /* 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>
parents: 53187
diff changeset
1011
5396
d1447950fa04 Quickly renamed the last directory.
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parents: 5197
diff changeset
1012 static PyObject *
42753
077fe7860cc9 Finish the work on __round__ and __trunc__.
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diff changeset
1013 float_round(PyObject *v, PyObject *args)
077fe7860cc9 Finish the work on __round__ and __trunc__.
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1014 {
61466
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diff changeset
1015 double x, rounded;
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1016 PyObject *o_ndigits = NULL;
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1017 Py_ssize_t ndigits;
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1018
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1019 x = PyFloat_AsDouble(v);
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1020 if (!PyArg_ParseTuple(args, "|O", &o_ndigits))
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1021 return NULL;
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1022 if (o_ndigits == NULL) {
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diff changeset
1023 /* single-argument round: round to nearest integer */
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1024 rounded = round(x);
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1025 if (fabs(x-rounded) == 0.5)
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diff changeset
1026 /* halfway case: round to even */
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diff changeset
1027 rounded = 2.0*round(x/2.0);
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1028 return PyLong_FromDouble(rounded);
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1029 }
42753
077fe7860cc9 Finish the work on __round__ and __trunc__.
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1030
61466
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1031 /* interpret second argument as a Py_ssize_t; clips on overflow */
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diff changeset
1032 ndigits = PyNumber_AsSsize_t(o_ndigits, NULL);
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diff changeset
1033 if (ndigits == -1 && PyErr_Occurred())
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diff changeset
1034 return NULL;
53218
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diff changeset
1035
61466
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diff changeset
1036 /* nans and infinities round to themselves */
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diff changeset
1037 if (!Py_IS_FINITE(x))
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1038 return PyFloat_FromDouble(x);
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1039
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diff changeset
1040 /* Deal with extreme values for ndigits. For ndigits > NDIGITS_MAX, x
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1041 always rounds to itself. For ndigits < NDIGITS_MIN, x always
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diff changeset
1042 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
1043 #define NDIGITS_MAX ((int)((DBL_MANT_DIG-DBL_MIN_EXP) * 0.30103))
d43d64252d36 Issue #1869 (and 4707, 5118, 5473, 1456775): use the new
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parents: 53187
diff changeset
1044 #define NDIGITS_MIN (-(int)((DBL_MAX_EXP + 1) * 0.30103))
61466
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diff changeset
1045 if (ndigits > NDIGITS_MAX)
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diff changeset
1046 /* return x */
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1047 return PyFloat_FromDouble(x);
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1048 else if (ndigits < NDIGITS_MIN)
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diff changeset
1049 /* return 0.0, but with sign of x */
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diff changeset
1050 return PyFloat_FromDouble(0.0*x);
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diff changeset
1051 else
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1052 /* finite x, and ndigits is not unreasonably large */
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diff changeset
1053 return double_round(x, (int)ndigits);
53218
d43d64252d36 Issue #1869 (and 4707, 5118, 5473, 1456775): use the new
Mark Dickinson <dickinsm@gmail.com>
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diff changeset
1054 #undef NDIGITS_MAX
d43d64252d36 Issue #1869 (and 4707, 5118, 5473, 1456775): use the new
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diff changeset
1055 #undef NDIGITS_MIN
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077fe7860cc9 Finish the work on __round__ and __trunc__.
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1056 }
077fe7860cc9 Finish the work on __round__ and __trunc__.
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1057
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diff changeset
1058 static PyObject *
13454
fcc75a3748f5 ANSI-fication of the sources.
Fred Drake <fdrake@acm.org>
parents: 13447
diff changeset
1059 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
1060 {
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1061 if (PyFloat_CheckExact(v))
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1062 Py_INCREF(v);
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1063 else
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1064 v = PyFloat_FromDouble(((PyFloatObject *)v)->ob_fval);
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1065 return v;
1049
2ed511171809 Made builtins int(), long(), float(), oct() and hex() more generic.
Guido van Rossum <guido@python.org>
parents: 955
diff changeset
1066 }
2ed511171809 Made builtins int(), long(), float(), oct() and hex() more generic.
Guido van Rossum <guido@python.org>
parents: 955
diff changeset
1067
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1068 /* turn ASCII hex characters into integer values and vice versa */
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1069
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1070 static char
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1071 char_from_hex(int x)
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1072 {
61466
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1073 assert(0 <= x && x < 16);
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1074 return "0123456789abcdef"[x];
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1075 }
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1076
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1077 static int
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1078 hex_from_char(char c) {
61466
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1079 int x;
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1080 switch(c) {
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1081 case '0':
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1082 x = 0;
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1083 break;
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1084 case '1':
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1085 x = 1;
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1086 break;
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1087 case '2':
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1088 x = 2;
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1089 break;
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1090 case '3':
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1091 x = 3;
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1092 break;
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1093 case '4':
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1094 x = 4;
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1095 break;
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1096 case '5':
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1097 x = 5;
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1098 break;
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1099 case '6':
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1100 x = 6;
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1101 break;
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1102 case '7':
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1103 x = 7;
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1104 break;
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1105 case '8':
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1106 x = 8;
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1107 break;
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1108 case '9':
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1109 x = 9;
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1110 break;
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1111 case 'a':
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1112 case 'A':
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1113 x = 10;
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1114 break;
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1115 case 'b':
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1116 case 'B':
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1117 x = 11;
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1118 break;
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1119 case 'c':
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1120 case 'C':
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1121 x = 12;
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1122 break;
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1123 case 'd':
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1124 case 'D':
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1125 x = 13;
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1126 break;
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1127 case 'e':
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1128 case 'E':
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diff changeset
1129 x = 14;
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diff changeset
1130 break;
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1131 case 'f':
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diff changeset
1132 case 'F':
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1133 x = 15;
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diff changeset
1134 break;
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1135 default:
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diff changeset
1136 x = -1;
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1137 break;
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1138 }
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1139 return x;
48497
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1140 }
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diff changeset
1141
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diff changeset
1142 /* convert a float to a hexadecimal string */
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diff changeset
1143
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diff changeset
1144 /* TOHEX_NBITS is DBL_MANT_DIG rounded up to the next integer
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diff changeset
1145 of the form 4k+1. */
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1146 #define TOHEX_NBITS DBL_MANT_DIG + 3 - (DBL_MANT_DIG+2)%4
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1147
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diff changeset
1148 static PyObject *
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diff changeset
1149 float_hex(PyObject *v)
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diff changeset
1150 {
61466
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1151 double x, m;
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diff changeset
1152 int e, shift, i, si, esign;
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diff changeset
1153 /* Space for 1+(TOHEX_NBITS-1)/4 digits, a decimal point, and the
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diff changeset
1154 trailing NUL byte. */
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1155 char s[(TOHEX_NBITS-1)/4+3];
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1156
61466
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1157 CONVERT_TO_DOUBLE(v, x);
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1158
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1159 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
1160 return float_repr((PyFloatObject *)v);
48497
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1161
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1162 if (x == 0.0) {
62690
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parents: 62558
diff changeset
1163 if (copysign(1.0, x) == -1.0)
61466
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1164 return PyUnicode_FromString("-0x0.0p+0");
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1165 else
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1166 return PyUnicode_FromString("0x0.0p+0");
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1167 }
48497
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1168
61466
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1169 m = frexp(fabs(x), &e);
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diff changeset
1170 shift = 1 - MAX(DBL_MIN_EXP - e, 0);
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1171 m = ldexp(m, shift);
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1172 e -= shift;
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1173
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1174 si = 0;
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1175 s[si] = char_from_hex((int)m);
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1176 si++;
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1177 m -= (int)m;
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1178 s[si] = '.';
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1179 si++;
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1180 for (i=0; i < (TOHEX_NBITS-1)/4; i++) {
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1181 m *= 16.0;
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1182 s[si] = char_from_hex((int)m);
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1183 si++;
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1184 m -= (int)m;
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1185 }
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1186 s[si] = '\0';
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1187
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1188 if (e < 0) {
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1189 esign = (int)'-';
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1190 e = -e;
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1191 }
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1192 else
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1193 esign = (int)'+';
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1194
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1195 if (x < 0.0)
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1196 return PyUnicode_FromFormat("-0x%sp%c%d", s, esign, e);
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1197 else
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1198 return PyUnicode_FromFormat("0x%sp%c%d", s, esign, e);
48497
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1199 }
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1200
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1201 PyDoc_STRVAR(float_hex_doc,
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diff changeset
1202 "float.hex() -> string\n\
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diff changeset
1203 \n\
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1204 Return a hexadecimal representation of a floating-point number.\n\
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diff changeset
1205 >>> (-0.1).hex()\n\
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diff changeset
1206 '-0x1.999999999999ap-4'\n\
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diff changeset
1207 >>> 3.14159.hex()\n\
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diff changeset
1208 '0x1.921f9f01b866ep+1'");
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1209
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1210 /* Convert a hexadecimal string to a float. */
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diff changeset
1211
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1212 static PyObject *
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1213 float_fromhex(PyObject *cls, PyObject *arg)
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1214 {
61466
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1215 PyObject *result_as_float, *result;
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diff changeset
1216 double x;
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1217 long exp, top_exp, lsb, key_digit;
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diff changeset
1218 char *s, *coeff_start, *s_store, *coeff_end, *exp_start, *s_end;
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1219 int half_eps, digit, round_up, negate=0;
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diff changeset
1220 Py_ssize_t length, ndigits, fdigits, i;
48497
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1221
61466
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1222 /*
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1223 * For the sake of simplicity and correctness, we impose an artificial
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diff changeset
1224 * limit on ndigits, the total number of hex digits in the coefficient
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1225 * The limit is chosen to ensure that, writing exp for the exponent,
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1226 *
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1227 * (1) if exp > LONG_MAX/2 then the value of the hex string is
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1228 * guaranteed to overflow (provided it's nonzero)
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1229 *
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1230 * (2) if exp < LONG_MIN/2 then the value of the hex string is
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diff changeset
1231 * guaranteed to underflow to 0.
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diff changeset
1232 *
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1233 * (3) if LONG_MIN/2 <= exp <= LONG_MAX/2 then there's no danger of
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diff changeset
1234 * overflow in the calculation of exp and top_exp below.
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diff changeset
1235 *
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1236 * More specifically, ndigits is assumed to satisfy the following
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diff changeset
1237 * inequalities:
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diff changeset
1238 *
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diff changeset
1239 * 4*ndigits <= DBL_MIN_EXP - DBL_MANT_DIG - LONG_MIN/2
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diff changeset
1240 * 4*ndigits <= LONG_MAX/2 + 1 - DBL_MAX_EXP
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diff changeset
1241 *
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1242 * If either of these inequalities is not satisfied, a ValueError is
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1243 * raised. Otherwise, write x for the value of the hex string, and
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1244 * assume x is nonzero. Then
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1245 *
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diff changeset
1246 * 2**(exp-4*ndigits) <= |x| < 2**(exp+4*ndigits).
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1247 *
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1248 * Now if exp > LONG_MAX/2 then:
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1249 *
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1250 * exp - 4*ndigits >= LONG_MAX/2 + 1 - (LONG_MAX/2 + 1 - DBL_MAX_EXP)
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1251 * = DBL_MAX_EXP
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1252 *
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1253 * so |x| >= 2**DBL_MAX_EXP, which is too large to be stored in C
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1254 * double, so overflows. If exp < LONG_MIN/2, then
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1255 *
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1256 * exp + 4*ndigits <= LONG_MIN/2 - 1 + (
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1257 * DBL_MIN_EXP - DBL_MANT_DIG - LONG_MIN/2)
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1258 * = DBL_MIN_EXP - DBL_MANT_DIG - 1
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diff changeset
1259 *
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1260 * and so |x| < 2**(DBL_MIN_EXP-DBL_MANT_DIG-1), hence underflows to 0
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1261 * when converted to a C double.
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1262 *
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1263 * It's easy to show that if LONG_MIN/2 <= exp <= LONG_MAX/2 then both
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1264 * exp+4*ndigits and exp-4*ndigits are within the range of a long.
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1265 */
48497
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1266
61466
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1267 s = _PyUnicode_AsStringAndSize(arg, &length);
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1268 if (s == NULL)
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1269 return NULL;
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1270 s_end = s + length;
48497
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1271
61466
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1272 /********************
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1273 * Parse the string *
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1274 ********************/
48497
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1275
61466
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1276 /* leading whitespace */
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diff changeset
1277 while (Py_ISSPACE(*s))
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1278 s++;
48497
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1279
61466
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1280 /* infinities and nans */
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diff changeset
1281 x = _Py_parse_inf_or_nan(s, &coeff_end);
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1282 if (coeff_end != s) {
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1283 s = coeff_end;
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1284 goto finished;
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1285 }
54232
4501b638fc3f Refactor to remove duplicated nan/inf parsing code in
Mark Dickinson <dickinsm@gmail.com>
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diff changeset
1286
61466
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1287 /* optional sign */
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1288 if (*s == '-') {
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1289 s++;
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1290 negate = 1;
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1291 }
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1292 else if (*s == '+')
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1293 s++;
48497
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1294
61466
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1295 /* [0x] */
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1296 s_store = s;
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1297 if (*s == '0') {
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1298 s++;
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1299 if (*s == 'x' || *s == 'X')
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1300 s++;
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1301 else
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1302 s = s_store;
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1303 }
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1304
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1305 /* coefficient: <integer> [. <fraction>] */
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1306 coeff_start = s;
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1307 while (hex_from_char(*s) >= 0)
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1308 s++;
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1309 s_store = s;
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1310 if (*s == '.') {
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1311 s++;
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diff changeset
1312 while (hex_from_char(*s) >= 0)
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1313 s++;
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1314 coeff_end = s-1;
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1315 }
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1316 else
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1317 coeff_end = s;
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1318
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1319 /* ndigits = total # of hex digits; fdigits = # after point */
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1320 ndigits = coeff_end - coeff_start;
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1321 fdigits = coeff_end - s_store;
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1322 if (ndigits == 0)
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1323 goto parse_error;
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1324 if (ndigits > MIN(DBL_MIN_EXP - DBL_MANT_DIG - LONG_MIN/2,
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1325 LONG_MAX/2 + 1 - DBL_MAX_EXP)/4)
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diff changeset
1326 goto insane_length_error;
48497
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Mark Dickinson <dickinsm@gmail.com>
parents: 48364
diff changeset
1327
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1328 /* [p <exponent>] */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1329 if (*s == 'p' || *s == 'P') {
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1330 s++;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1331 exp_start = s;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1332 if (*s == '-' || *s == '+')
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1333 s++;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1334 if (!('0' <= *s && *s <= '9'))
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1335 goto parse_error;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1336 s++;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1337 while ('0' <= *s && *s <= '9')
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1338 s++;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1339 exp = strtol(exp_start, NULL, 10);
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1340 }
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1341 else
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1342 exp = 0;
48497
2bb866d282ba Merged revisions 64974 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
parents: 48364
diff changeset
1343
2bb866d282ba Merged revisions 64974 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
parents: 48364
diff changeset
1344 /* for 0 <= j < ndigits, HEX_DIGIT(j) gives the jth most significant digit */
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1345 #define HEX_DIGIT(j) hex_from_char(*((j) < fdigits ? \
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1346 coeff_end-(j) : \
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1347 coeff_end-1-(j)))
48497
2bb866d282ba Merged revisions 64974 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
parents: 48364
diff changeset
1348
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1349 /*******************************************
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1350 * Compute rounded value of the hex string *
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1351 *******************************************/
48497
2bb866d282ba Merged revisions 64974 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
parents: 48364
diff changeset
1352
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1353 /* Discard leading zeros, and catch extreme overflow and underflow */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1354 while (ndigits > 0 && HEX_DIGIT(ndigits-1) == 0)
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1355 ndigits--;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1356 if (ndigits == 0 || exp < LONG_MIN/2) {
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1357 x = 0.0;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1358 goto finished;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1359 }
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1360 if (exp > LONG_MAX/2)
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1361 goto overflow_error;
48497
2bb866d282ba Merged revisions 64974 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
parents: 48364
diff changeset
1362
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1363 /* Adjust exponent for fractional part. */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1364 exp = exp - 4*((long)fdigits);
48497
2bb866d282ba Merged revisions 64974 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
parents: 48364
diff changeset
1365
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1366 /* top_exp = 1 more than exponent of most sig. bit of coefficient */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1367 top_exp = exp + 4*((long)ndigits - 1);
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1368 for (digit = HEX_DIGIT(ndigits-1); digit != 0; digit /= 2)
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1369 top_exp++;
48497
2bb866d282ba Merged revisions 64974 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
parents: 48364
diff changeset
1370
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1371 /* catch almost all nonextreme cases of overflow and underflow here */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1372 if (top_exp < DBL_MIN_EXP - DBL_MANT_DIG) {
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1373 x = 0.0;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1374 goto finished;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1375 }
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1376 if (top_exp > DBL_MAX_EXP)
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1377 goto overflow_error;
48497
2bb866d282ba Merged revisions 64974 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
parents: 48364
diff changeset
1378
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1379 /* lsb = exponent of least significant bit of the *rounded* value.
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1380 This is top_exp - DBL_MANT_DIG unless result is subnormal. */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1381 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
1382
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1383 x = 0.0;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1384 if (exp >= lsb) {
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1385 /* no rounding required */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1386 for (i = ndigits-1; i >= 0; i--)
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1387 x = 16.0*x + HEX_DIGIT(i);
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1388 x = ldexp(x, (int)(exp));
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1389 goto finished;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1390 }
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1391 /* rounding required. key_digit is the index of the hex digit
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1392 containing the first bit to be rounded away. */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1393 half_eps = 1 << (int)((lsb - exp - 1) % 4);
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1394 key_digit = (lsb - exp - 1) / 4;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1395 for (i = ndigits-1; i > key_digit; i--)
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1396 x = 16.0*x + HEX_DIGIT(i);
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1397 digit = HEX_DIGIT(key_digit);
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1398 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
1399
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1400 /* round-half-even: round up if bit lsb-1 is 1 and at least one of
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1401 bits lsb, lsb-2, lsb-3, lsb-4, ... is 1. */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1402 if ((digit & half_eps) != 0) {
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1403 round_up = 0;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1404 if ((digit & (3*half_eps-1)) != 0 ||
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1405 (half_eps == 8 && (HEX_DIGIT(key_digit+1) & 1) != 0))
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1406 round_up = 1;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1407 else
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1408 for (i = key_digit-1; i >= 0; i--)
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1409 if (HEX_DIGIT(i) != 0) {
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1410 round_up = 1;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1411 break;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1412 }
62834
202f31d40389 Style nit.
Mark Dickinson <dickinsm@gmail.com>
parents: 62690
diff changeset
1413 if (round_up) {
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1414 x += 2*half_eps;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1415 if (top_exp == DBL_MAX_EXP &&
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1416 x == ldexp((double)(2*half_eps), DBL_MANT_DIG))
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1417 /* overflow corner case: pre-rounded value <
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1418 2**DBL_MAX_EXP; rounded=2**DBL_MAX_EXP. */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1419 goto overflow_error;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1420 }
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1421 }
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1422 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
1423
2bb866d282ba Merged revisions 64974 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
parents: 48364
diff changeset
1424 finished:
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1425 /* optional trailing whitespace leading to the end of the string */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1426 while (Py_ISSPACE(*s))
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1427 s++;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1428 if (s != s_end)
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1429 goto parse_error;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1430 result_as_float = Py_BuildValue("(d)", negate ? -x : x);
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1431 if (result_as_float == NULL)
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1432 return NULL;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1433 result = PyObject_CallObject(cls, result_as_float);
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1434 Py_DECREF(result_as_float);
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1435 return result;
48497
2bb866d282ba Merged revisions 64974 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
parents: 48364
diff changeset
1436
2bb866d282ba Merged revisions 64974 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
parents: 48364
diff changeset
1437 overflow_error:
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1438 PyErr_SetString(PyExc_OverflowError,
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1439 "hexadecimal value too large to represent as a float");
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1440 return NULL;
48497
2bb866d282ba Merged revisions 64974 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
parents: 48364
diff changeset
1441
2bb866d282ba Merged revisions 64974 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
parents: 48364
diff changeset
1442 parse_error:
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1443 PyErr_SetString(PyExc_ValueError,
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1444 "invalid hexadecimal floating-point string");
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1445 return NULL;
48497
2bb866d282ba Merged revisions 64974 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
parents: 48364
diff changeset
1446
2bb866d282ba Merged revisions 64974 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
parents: 48364
diff changeset
1447 insane_length_error:
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1448 PyErr_SetString(PyExc_ValueError,
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1449 "hexadecimal string too long to convert");
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1450 return NULL;
48497
2bb866d282ba Merged revisions 64974 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
parents: 48364
diff changeset
1451 }
2bb866d282ba Merged revisions 64974 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
parents: 48364
diff changeset
1452
2bb866d282ba Merged revisions 64974 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
parents: 48364
diff changeset
1453 PyDoc_STRVAR(float_fromhex_doc,
2bb866d282ba Merged revisions 64974 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
parents: 48364
diff changeset
1454 "float.fromhex(string) -> float\n\
2bb866d282ba Merged revisions 64974 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
parents: 48364
diff changeset
1455 \n\
2bb866d282ba Merged revisions 64974 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
parents: 48364
diff changeset
1456 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
1457 >>> float.fromhex('0x1.ffffp10')\n\
2bb866d282ba Merged revisions 64974 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
parents: 48364
diff changeset
1458 2047.984375\n\
2bb866d282ba Merged revisions 64974 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
parents: 48364
diff changeset
1459 >>> float.fromhex('-0x1p-1074')\n\
2bb866d282ba Merged revisions 64974 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
parents: 48364
diff changeset
1460 -4.9406564584124654e-324");
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Mark Dickinson <dickinsm@gmail.com>
parents: 48364
diff changeset
1461
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diff changeset
1462
45026
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Christian Heimes <christian@cheimes.de>
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diff changeset
1463 static PyObject *
45134
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Christian Heimes <christian@cheimes.de>
parents: 45071
diff changeset
1464 float_as_integer_ratio(PyObject *v, PyObject *unused)
45026
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Christian Heimes <christian@cheimes.de>
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diff changeset
1465 {
61466
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diff changeset
1466 double self;
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parents: 59014
diff changeset
1467 double float_part;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1468 int exponent;
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parents: 59014
diff changeset
1469 int i;
45134
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diff changeset
1470
61466
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diff changeset
1471 PyObject *prev;
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parents: 59014
diff changeset
1472 PyObject *py_exponent = NULL;
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parents: 59014
diff changeset
1473 PyObject *numerator = NULL;
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parents: 59014
diff changeset
1474 PyObject *denominator = NULL;
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parents: 59014
diff changeset
1475 PyObject *result_pair = NULL;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1476 PyNumberMethods *long_methods = PyLong_Type.tp_as_number;
45026
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Christian Heimes <christian@cheimes.de>
parents: 44943
diff changeset
1477
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Christian Heimes <christian@cheimes.de>
parents: 44943
diff changeset
1478 #define INPLACE_UPDATE(obj, call) \
61466
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Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1479 prev = obj; \
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parents: 59014
diff changeset
1480 obj = call; \
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parents: 59014
diff changeset
1481 Py_DECREF(prev); \
45026
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Christian Heimes <christian@cheimes.de>
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diff changeset
1482
61466
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diff changeset
1483 CONVERT_TO_DOUBLE(v, self);
45026
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Christian Heimes <christian@cheimes.de>
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diff changeset
1484
61466
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diff changeset
1485 if (Py_IS_INFINITY(self)) {
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parents: 59014
diff changeset
1486 PyErr_SetString(PyExc_OverflowError,
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parents: 59014
diff changeset
1487 "Cannot pass infinity to float.as_integer_ratio.");
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parents: 59014
diff changeset
1488 return NULL;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1489 }
45026
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Christian Heimes <christian@cheimes.de>
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diff changeset
1490 #ifdef Py_NAN
61466
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diff changeset
1491 if (Py_IS_NAN(self)) {
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parents: 59014
diff changeset
1492 PyErr_SetString(PyExc_ValueError,
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parents: 59014
diff changeset
1493 "Cannot pass NaN to float.as_integer_ratio.");
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parents: 59014
diff changeset
1494 return NULL;
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parents: 59014
diff changeset
1495 }
45026
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Christian Heimes <christian@cheimes.de>
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diff changeset
1496 #endif
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Christian Heimes <christian@cheimes.de>
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diff changeset
1497
61466
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diff changeset
1498 PyFPE_START_PROTECT("as_integer_ratio", goto error);
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
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parents: 59014
diff changeset
1499 float_part = frexp(self, &exponent); /* self == float_part * 2**exponent exactly */
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parents: 59014
diff changeset
1500 PyFPE_END_PROTECT(float_part);
45026
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diff changeset
1501
61466
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diff changeset
1502 for (i=0; i<300 && float_part != floor(float_part) ; i++) {
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parents: 59014
diff changeset
1503 float_part *= 2.0;
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parents: 59014
diff changeset
1504 exponent--;
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parents: 59014
diff changeset
1505 }
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parents: 59014
diff changeset
1506 /* self == float_part * 2**exponent exactly and float_part is integral.
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parents: 59014
diff changeset
1507 If FLT_RADIX != 2, the 300 steps may leave a tiny fractional part
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1508 to be truncated by PyLong_FromDouble(). */
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diff changeset
1509
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diff changeset
1510 numerator = PyLong_FromDouble(float_part);
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1511 if (numerator == NULL) goto error;
45026
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Christian Heimes <christian@cheimes.de>
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diff changeset
1512
61466
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diff changeset
1513 /* fold in 2**exponent */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1514 denominator = PyLong_FromLong(1);
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parents: 59014
diff changeset
1515 py_exponent = PyLong_FromLong(labs((long)exponent));
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1516 if (py_exponent == NULL) goto error;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1517 INPLACE_UPDATE(py_exponent,
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
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parents: 59014
diff changeset
1518 long_methods->nb_lshift(denominator, py_exponent));
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
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parents: 59014
diff changeset
1519 if (py_exponent == NULL) goto error;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1520 if (exponent > 0) {
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
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parents: 59014
diff changeset
1521 INPLACE_UPDATE(numerator,
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parents: 59014
diff changeset
1522 long_methods->nb_multiply(numerator, py_exponent));
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parents: 59014
diff changeset
1523 if (numerator == NULL) goto error;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1524 }
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parents: 59014
diff changeset
1525 else {
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parents: 59014
diff changeset
1526 Py_DECREF(denominator);
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Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1527 denominator = py_exponent;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1528 py_exponent = NULL;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1529 }
45026
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Christian Heimes <christian@cheimes.de>
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diff changeset
1530
61466
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diff changeset
1531 result_pair = PyTuple_Pack(2, numerator, denominator);
45026
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Christian Heimes <christian@cheimes.de>
parents: 44943
diff changeset
1532
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Christian Heimes <christian@cheimes.de>
parents: 44943
diff changeset
1533 #undef INPLACE_UPDATE
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Christian Heimes <christian@cheimes.de>
parents: 44943
diff changeset
1534 error:
61466
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Antoine Pitrou <solipsis@pitrou.net>
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diff changeset
1535 Py_XDECREF(py_exponent);
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
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parents: 59014
diff changeset
1536 Py_XDECREF(denominator);
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
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parents: 59014
diff changeset
1537 Py_XDECREF(numerator);
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parents: 59014
diff changeset
1538 return result_pair;
45026
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Christian Heimes <christian@cheimes.de>
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diff changeset
1539 }
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Christian Heimes <christian@cheimes.de>
parents: 44943
diff changeset
1540
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Christian Heimes <christian@cheimes.de>
parents: 44943
diff changeset
1541 PyDoc_STRVAR(float_as_integer_ratio_doc,
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Christian Heimes <christian@cheimes.de>
parents: 44943
diff changeset
1542 "float.as_integer_ratio() -> (int, int)\n"
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Christian Heimes <christian@cheimes.de>
parents: 44943
diff changeset
1543 "\n"
45134
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parents: 45071
diff changeset
1544 "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
1545 "float and with a positive denominator.\n"
49493
bdf4da5d04ad merge from trunk
Benjamin Peterson <benjamin@python.org>
parents: 49270
diff changeset
1546 "Raises OverflowError on infinities and a ValueError on NaNs.\n"
45026
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Christian Heimes <christian@cheimes.de>
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diff changeset
1547 "\n"
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Christian Heimes <christian@cheimes.de>
parents: 44943
diff changeset
1548 ">>> (10.0).as_integer_ratio()\n"
45134
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parents: 45071
diff changeset
1549 "(10, 1)\n"
45026
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Christian Heimes <christian@cheimes.de>
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diff changeset
1550 ">>> (0.0).as_integer_ratio()\n"
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Christian Heimes <christian@cheimes.de>
parents: 44943
diff changeset
1551 "(0, 1)\n"
ebfbaa1051e2 Merged revisions 60364-60378 via svnmerge from
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parents: 44943
diff changeset
1552 ">>> (-.25).as_integer_ratio()\n"
45134
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parents: 45071
diff changeset
1553 "(-1, 4)");
45026
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Christian Heimes <christian@cheimes.de>
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diff changeset
1554
1049
2ed511171809 Made builtins int(), long(), float(), oct() and hex() more generic.
Guido van Rossum <guido@python.org>
parents: 955
diff changeset
1555
24280
1598a1e473e2 staticforward bites the dust.
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 23832
diff changeset
1556 static PyObject *
19552
6c30d20d27f2 Make int, long and float subclassable.
Guido van Rossum <guido@python.org>
parents: 19457
diff changeset
1557 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
1558
18933
09df3254b49d Merge of descr-branch back into trunk.
Tim Peters <tim.peters@gmail.com>
parents: 18838
diff changeset
1559 static PyObject *
09df3254b49d Merge of descr-branch back into trunk.
Tim Peters <tim.peters@gmail.com>
parents: 18838
diff changeset
1560 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
1561 {
61466
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parents: 59014
diff changeset
1562 PyObject *x = Py_False; /* Integer zero */
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Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1563 static char *kwlist[] = {"x", 0};
18933
09df3254b49d Merge of descr-branch back into trunk.
Tim Peters <tim.peters@gmail.com>
parents: 18838
diff changeset
1564
61466
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Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1565 if (type != &PyFloat_Type)
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Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1566 return float_subtype_new(type, args, kwds); /* Wimp out */
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Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1567 if (!PyArg_ParseTupleAndKeywords(args, kwds, "|O:float", kwlist, &x))
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Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1568 return NULL;
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parents: 59014
diff changeset
1569 /* If it's a string, but not a string subclass, use
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Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1570 PyFloat_FromString. */
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parents: 59014
diff changeset
1571 if (PyUnicode_CheckExact(x))
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parents: 59014
diff changeset
1572 return PyFloat_FromString(x);
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Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1573 return PyNumber_Float(x);
18933
09df3254b49d Merge of descr-branch back into trunk.
Tim Peters <tim.peters@gmail.com>
parents: 18838
diff changeset
1574 }
09df3254b49d Merge of descr-branch back into trunk.
Tim Peters <tim.peters@gmail.com>
parents: 18838
diff changeset
1575
19552
6c30d20d27f2 Make int, long and float subclassable.
Guido van Rossum <guido@python.org>
parents: 19457
diff changeset
1576 /* 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
1577 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
1578 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
1579 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
1580 */
6c30d20d27f2 Make int, long and float subclassable.
Guido van Rossum <guido@python.org>
parents: 19457
diff changeset
1581 static PyObject *
6c30d20d27f2 Make int, long and float subclassable.
Guido van Rossum <guido@python.org>
parents: 19457
diff changeset
1582 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
1583 {
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1584 PyObject *tmp, *newobj;
19552
6c30d20d27f2 Make int, long and float subclassable.
Guido van Rossum <guido@python.org>
parents: 19457
diff changeset
1585
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1586 assert(PyType_IsSubtype(type, &PyFloat_Type));
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1587 tmp = float_new(&PyFloat_Type, args, kwds);
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1588 if (tmp == NULL)
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1589 return NULL;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1590 assert(PyFloat_CheckExact(tmp));
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1591 newobj = type->tp_alloc(type, 0);
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1592 if (newobj == NULL) {
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1593 Py_DECREF(tmp);
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1594 return NULL;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1595 }
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1596 ((PyFloatObject *)newobj)->ob_fval = ((PyFloatObject *)tmp)->ob_fval;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1597 Py_DECREF(tmp);
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1598 return newobj;
19552
6c30d20d27f2 Make int, long and float subclassable.
Guido van Rossum <guido@python.org>
parents: 19457
diff changeset
1599 }
6c30d20d27f2 Make int, long and float subclassable.
Guido van Rossum <guido@python.org>
parents: 19457
diff changeset
1600
27521
17bfd5dbc0f1 Implement appropriate __getnewargs__ for all immutable subclassable builtin
Guido van Rossum <guido@python.org>
parents: 27484
diff changeset
1601 static PyObject *
17bfd5dbc0f1 Implement appropriate __getnewargs__ for all immutable subclassable builtin
Guido van Rossum <guido@python.org>
parents: 27484
diff changeset
1602 float_getnewargs(PyFloatObject *v)
17bfd5dbc0f1 Implement appropriate __getnewargs__ for all immutable subclassable builtin
Guido van Rossum <guido@python.org>
parents: 27484
diff changeset
1603 {
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1604 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
1605 }
17bfd5dbc0f1 Implement appropriate __getnewargs__ for all immutable subclassable builtin
Guido van Rossum <guido@python.org>
parents: 27484
diff changeset
1606
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1607 /* 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
1608
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1609 typedef enum {
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1610 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
1611 } float_format_type;
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1612
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1613 static float_format_type double_format, float_format;
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1614 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
1615
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1616 static PyObject *
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1617 float_getformat(PyTypeObject *v, PyObject* arg)
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1618 {
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1619 char* s;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1620 float_format_type r;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1621
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1622 if (!PyUnicode_Check(arg)) {
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1623 PyErr_Format(PyExc_TypeError,
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1624 "__getformat__() argument must be string, not %.500s",
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1625 Py_TYPE(arg)->tp_name);
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1626 return NULL;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1627 }
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1628 s = _PyUnicode_AsString(arg);
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1629 if (s == NULL)
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1630 return NULL;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1631 if (strcmp(s, "double") == 0) {
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1632 r = double_format;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1633 }
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1634 else if (strcmp(s, "float") == 0) {
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1635 r = float_format;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1636 }
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1637 else {
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1638 PyErr_SetString(PyExc_ValueError,
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1639 "__getformat__() argument 1 must be "
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1640 "'double' or 'float'");
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1641 return NULL;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1642 }
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1643
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1644 switch (r) {
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1645 case unknown_format:
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1646 return PyUnicode_FromString("unknown");
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1647 case ieee_little_endian_format:
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1648 return PyUnicode_FromString("IEEE, little-endian");
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1649 case ieee_big_endian_format:
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1650 return PyUnicode_FromString("IEEE, big-endian");
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1651 default:
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1652 Py_FatalError("insane float_format or double_format");
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1653 return NULL;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1654 }
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1655 }
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1656
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1657 PyDoc_STRVAR(float_getformat_doc,
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1658 "float.__getformat__(typestr) -> string\n"
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1659 "\n"
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1660 "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
1661 "used in Python's test suite.\n"
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1662 "\n"
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1663 "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
1664 "'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
1665 "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
1666
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1667 static PyObject *
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1668 float_setformat(PyTypeObject *v, PyObject* args)
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1669 {
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1670 char* typestr;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1671 char* format;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1672 float_format_type f;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1673 float_format_type detected;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1674 float_format_type *p;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1675
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1676 if (!PyArg_ParseTuple(args, "ss:__setformat__", &typestr, &format))
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1677 return NULL;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1678
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1679 if (strcmp(typestr, "double") == 0) {
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1680 p = &double_format;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1681 detected = detected_double_format;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1682 }
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1683 else if (strcmp(typestr, "float") == 0) {
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1684 p = &float_format;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1685 detected = detected_float_format;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1686 }
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1687 else {
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1688 PyErr_SetString(PyExc_ValueError,
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1689 "__setformat__() argument 1 must "
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1690 "be 'double' or 'float'");
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1691 return NULL;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1692 }
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1693
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1694 if (strcmp(format, "unknown") == 0) {
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1695 f = unknown_format;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1696 }
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1697 else if (strcmp(format, "IEEE, little-endian") == 0) {
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1698 f = ieee_little_endian_format;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1699 }
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1700 else if (strcmp(format, "IEEE, big-endian") == 0) {
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1701 f = ieee_big_endian_format;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1702 }
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1703 else {
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1704 PyErr_SetString(PyExc_ValueError,
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1705 "__setformat__() argument 2 must be "
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1706 "'unknown', 'IEEE, little-endian' or "
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1707 "'IEEE, big-endian'");
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1708 return NULL;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1709
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1710 }
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1711
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1712 if (f != unknown_format && f != detected) {
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1713 PyErr_Format(PyExc_ValueError,
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1714 "can only set %s format to 'unknown' or the "
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1715 "detected platform value", typestr);
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1716 return NULL;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1717 }
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1718
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1719 *p = f;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1720 Py_RETURN_NONE;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1721 }
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1722
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1723 PyDoc_STRVAR(float_setformat_doc,
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1724 "float.__setformat__(typestr, fmt) -> None\n"
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1725 "\n"
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1726 "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
1727 "used in Python's test suite.\n"
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1728 "\n"
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1729 "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
1730 "'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
1731 "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
1732 "\n"
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1733 "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
1734 "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
1735
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
1736 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
1737 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
1738 {
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1739 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
1740 }
d3a5c796c8ba Changes to long and float by Jeffrey Jasskin to conform to PEP 3141.
Guido van Rossum <guido@python.org>
parents: 42334
diff changeset
1741
42817
5355337709e1 Implementation of PEP 3101, Advanced String Formatting.
Eric Smith <eric@trueblade.com>
parents: 42753
diff changeset
1742 static PyObject *
5355337709e1 Implementation of PEP 3101, Advanced String Formatting.
Eric Smith <eric@trueblade.com>
parents: 42753
diff changeset
1743 float__format__(PyObject *self, PyObject *args)
5355337709e1 Implementation of PEP 3101, Advanced String Formatting.
Eric Smith <eric@trueblade.com>
parents: 42753
diff changeset
1744 {
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1745 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
1746
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1747 if (!PyArg_ParseTuple(args, "U:__format__", &format_spec))
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1748 return NULL;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1749 return _PyFloat_FormatAdvanced(self,
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1750 PyUnicode_AS_UNICODE(format_spec),
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1751 PyUnicode_GET_SIZE(format_spec));
42817
5355337709e1 Implementation of PEP 3101, Advanced String Formatting.
Eric Smith <eric@trueblade.com>
parents: 42753
diff changeset
1752 }
5355337709e1 Implementation of PEP 3101, Advanced String Formatting.
Eric Smith <eric@trueblade.com>
parents: 42753
diff changeset
1753
5355337709e1 Implementation of PEP 3101, Advanced String Formatting.
Eric Smith <eric@trueblade.com>
parents: 42753
diff changeset
1754 PyDoc_STRVAR(float__format__doc,
5355337709e1 Implementation of PEP 3101, Advanced String Formatting.
Eric Smith <eric@trueblade.com>
parents: 42753
diff changeset
1755 "float.__format__(format_spec) -> string\n"
5355337709e1 Implementation of PEP 3101, Advanced String Formatting.
Eric Smith <eric@trueblade.com>
parents: 42753
diff changeset
1756 "\n"
5355337709e1 Implementation of PEP 3101, Advanced String Formatting.
Eric Smith <eric@trueblade.com>
parents: 42753
diff changeset
1757 "Formats the float according to format_spec.");
5355337709e1 Implementation of PEP 3101, Advanced String Formatting.
Eric Smith <eric@trueblade.com>
parents: 42753
diff changeset
1758
5355337709e1 Implementation of PEP 3101, Advanced String Formatting.
Eric Smith <eric@trueblade.com>
parents: 42753
diff changeset
1759
27521
17bfd5dbc0f1 Implement appropriate __getnewargs__ for all immutable subclassable builtin
Guido van Rossum <guido@python.org>
parents: 27484
diff changeset
1760 static PyMethodDef float_methods[] = {
61466
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parents: 59014
diff changeset
1761 {"conjugate", (PyCFunction)float_float, METH_NOARGS,
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1762 "Returns self, the complex conjugate of any float."},
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1763 {"__trunc__", (PyCFunction)float_trunc, METH_NOARGS,
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1764 "Returns the Integral closest to x between 0 and x."},
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1765 {"__round__", (PyCFunction)float_round, METH_VARARGS,
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1766 "Returns the Integral closest to x, rounding half toward even.\n"
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1767 "When an argument is passed, works like built-in round(x, ndigits)."},
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1768 {"as_integer_ratio", (PyCFunction)float_as_integer_ratio, METH_NOARGS,
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1769 float_as_integer_ratio_doc},
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1770 {"fromhex", (PyCFunction)float_fromhex,
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
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parents: 59014
diff changeset
1771 METH_O|METH_CLASS, float_fromhex_doc},
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
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parents: 59014
diff changeset
1772 {"hex", (PyCFunction)float_hex,
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
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parents: 59014
diff changeset
1773 METH_NOARGS, float_hex_doc},
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1774 {"is_integer", (PyCFunction)float_is_integer, METH_NOARGS,
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
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parents: 59014
diff changeset
1775 "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
1776 #if 0
61466
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Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1777 {"is_inf", (PyCFunction)float_is_inf, METH_NOARGS,
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
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parents: 59014
diff changeset
1778 "Returns True if the float is positive or negative infinite."},
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1779 {"is_finite", (PyCFunction)float_is_finite, METH_NOARGS,
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
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parents: 59014
diff changeset
1780 "Returns True if the float is finite, neither infinite nor NaN."},
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1781 {"is_nan", (PyCFunction)float_is_nan, METH_NOARGS,
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
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parents: 59014
diff changeset
1782 "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
1783 #endif
61466
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parents: 59014
diff changeset
1784 {"__getnewargs__", (PyCFunction)float_getnewargs, METH_NOARGS},
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1785 {"__getformat__", (PyCFunction)float_getformat,
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1786 METH_O|METH_CLASS, float_getformat_doc},
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
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parents: 59014
diff changeset
1787 {"__setformat__", (PyCFunction)float_setformat,
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
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parents: 59014
diff changeset
1788 METH_VARARGS|METH_CLASS, float_setformat_doc},
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
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parents: 59014
diff changeset
1789 {"__format__", (PyCFunction)float__format__,
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
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parents: 59014
diff changeset
1790 METH_VARARGS, float__format__doc},
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1791 {NULL, NULL} /* sentinel */
27521
17bfd5dbc0f1 Implement appropriate __getnewargs__ for all immutable subclassable builtin
Guido van Rossum <guido@python.org>
parents: 27484
diff changeset
1792 };
17bfd5dbc0f1 Implement appropriate __getnewargs__ for all immutable subclassable builtin
Guido van Rossum <guido@python.org>
parents: 27484
diff changeset
1793
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
1794 static PyGetSetDef float_getset[] = {
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
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parents: 59014
diff changeset
1795 {"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
1796 (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
1797 "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
1798 NULL},
61466
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Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1799 {"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
1800 (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
1801 "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
1802 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 {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
1804 };
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
23832
ed1ba37a46b7 Patch #568124: Add doc string macros.
Martin v. Löwis <martin@v.loewis.de>
parents: 23344
diff changeset
1806 PyDoc_STRVAR(float_doc,
18933
09df3254b49d Merge of descr-branch back into trunk.
Tim Peters <tim.peters@gmail.com>
parents: 18838
diff changeset
1807 "float(x) -> floating point number\n\
09df3254b49d Merge of descr-branch back into trunk.
Tim Peters <tim.peters@gmail.com>
parents: 18838
diff changeset
1808 \n\
23832
ed1ba37a46b7 Patch #568124: Add doc string macros.
Martin v. Löwis <martin@v.loewis.de>
parents: 23344
diff changeset
1809 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
1810
09df3254b49d Merge of descr-branch back into trunk.
Tim Peters <tim.peters@gmail.com>
parents: 18838
diff changeset
1811
5396
d1447950fa04 Quickly renamed the last directory.
Guido van Rossum <guido@python.org>
parents: 5197
diff changeset
1812 static PyNumberMethods float_as_number = {
61466
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parents: 59014
diff changeset
1813 float_add, /*nb_add*/
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
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parents: 59014
diff changeset
1814 float_sub, /*nb_subtract*/
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
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parents: 59014
diff changeset
1815 float_mul, /*nb_multiply*/
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
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parents: 59014
diff changeset
1816 float_rem, /*nb_remainder*/
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
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parents: 59014
diff changeset
1817 float_divmod, /*nb_divmod*/
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1818 float_pow, /*nb_power*/
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
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parents: 59014
diff changeset
1819 (unaryfunc)float_neg, /*nb_negative*/
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
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parents: 59014
diff changeset
1820 (unaryfunc)float_float, /*nb_positive*/
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parents: 59014
diff changeset
1821 (unaryfunc)float_abs, /*nb_absolute*/
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parents: 59014
diff changeset
1822 (inquiry)float_bool, /*nb_bool*/
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parents: 59014
diff changeset
1823 0, /*nb_invert*/
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parents: 59014
diff changeset
1824 0, /*nb_lshift*/
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parents: 59014
diff changeset
1825 0, /*nb_rshift*/
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parents: 59014
diff changeset
1826 0, /*nb_and*/
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diff changeset
1827 0, /*nb_xor*/
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
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parents: 59014
diff changeset
1828 0, /*nb_or*/
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parents: 59014
diff changeset
1829 float_trunc, /*nb_int*/
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parents: 59014
diff changeset
1830 0, /*nb_reserved*/
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parents: 59014
diff changeset
1831 float_float, /*nb_float*/
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
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diff changeset
1832 0, /* nb_inplace_add */
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diff changeset
1833 0, /* nb_inplace_subtract */
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diff changeset
1834 0, /* nb_inplace_multiply */
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diff changeset
1835 0, /* nb_inplace_remainder */
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diff changeset
1836 0, /* nb_inplace_power */
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parents: 59014
diff changeset
1837 0, /* nb_inplace_lshift */
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diff changeset
1838 0, /* nb_inplace_rshift */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
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parents: 59014
diff changeset
1839 0, /* nb_inplace_and */
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parents: 59014
diff changeset
1840 0, /* nb_inplace_xor */
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diff changeset
1841 0, /* nb_inplace_or */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
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diff changeset
1842 float_floor_div, /* nb_floor_divide */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
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parents: 59014
diff changeset
1843 float_div, /* nb_true_divide */
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diff changeset
1844 0, /* nb_inplace_floor_divide */
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diff changeset
1845 0, /* nb_inplace_true_divide */
6
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
1846 };
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
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diff changeset
1847
5396
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Guido van Rossum <guido@python.org>
parents: 5197
diff changeset
1848 PyTypeObject PyFloat_Type = {
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1849 PyVarObject_HEAD_INIT(&PyType_Type, 0)
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diff changeset
1850 "float",
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1851 sizeof(PyFloatObject),
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1852 0,
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diff changeset
1853 (destructor)float_dealloc, /* tp_dealloc */
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diff changeset
1854 0, /* tp_print */
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1855 0, /* tp_getattr */
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1856 0, /* tp_setattr */
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1857 0, /* tp_reserved */
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diff changeset
1858 (reprfunc)float_repr, /* tp_repr */
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diff changeset
1859 &float_as_number, /* tp_as_number */
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diff changeset
1860 0, /* tp_as_sequence */
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1861 0, /* tp_as_mapping */
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diff changeset
1862 (hashfunc)float_hash, /* tp_hash */
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diff changeset
1863 0, /* tp_call */
63750
eafe07d40eb7 Issue #9337: Make float.__str__ identical to float.__repr__.
Mark Dickinson <dickinsm@gmail.com>
parents: 62834
diff changeset
1864 (reprfunc)float_repr, /* tp_str */
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1865 PyObject_GenericGetAttr, /* tp_getattro */
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1866 0, /* tp_setattro */
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diff changeset
1867 0, /* tp_as_buffer */
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diff changeset
1868 Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE, /* tp_flags */
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1869 float_doc, /* tp_doc */
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1870 0, /* tp_traverse */
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1871 0, /* tp_clear */
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1872 float_richcompare, /* tp_richcompare */
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1873 0, /* tp_weaklistoffset */
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1874 0, /* tp_iter */
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1875 0, /* tp_iternext */
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diff changeset
1876 float_methods, /* tp_methods */
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1877 0, /* tp_members */
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diff changeset
1878 float_getset, /* tp_getset */
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1879 0, /* tp_base */
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1880 0, /* tp_dict */
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1881 0, /* tp_descr_get */
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1882 0, /* tp_descr_set */
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1883 0, /* tp_dictoffset */
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1884 0, /* tp_init */
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1885 0, /* tp_alloc */
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diff changeset
1886 float_new, /* tp_new */
6
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
1887 };
5936
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Guido van Rossum <guido@python.org>
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1888
80d24364b932 Added _Fini() routines to free up some memory
Guido van Rossum <guido@python.org>
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diff changeset
1889 void
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1890 _PyFloat_Init(void)
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
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1891 {
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1892 /* We attempt to determine if this machine is using IEEE
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1893 floating point formats by peering at the bits of some
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1894 carefully chosen values. If it looks like we are on an
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1895 IEEE platform, the float packing/unpacking routines can
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1896 just copy bits, if not they resort to arithmetic & shifts
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1897 and masks. The shifts & masks approach works on all finite
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1898 values, but what happens to infinities, NaNs and signed
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1899 zeroes on packing is an accident, and attempting to unpack
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1900 a NaN or an infinity will raise an exception.
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1901
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1902 Note that if we're on some whacked-out platform which uses
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1903 IEEE formats but isn't strictly little-endian or big-
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1904 endian, we will fall back to the portable shifts & masks
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1905 method. */
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1906
1dd8a0d64432 This is my patch:
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parents: 34931
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1907 #if SIZEOF_DOUBLE == 8
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1908 {
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1909 double x = 9006104071832581.0;
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1910 if (memcmp(&x, "\x43\x3f\xff\x01\x02\x03\x04\x05", 8) == 0)
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1911 detected_double_format = ieee_big_endian_format;
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1912 else if (memcmp(&x, "\x05\x04\x03\x02\x01\xff\x3f\x43", 8) == 0)
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1913 detected_double_format = ieee_little_endian_format;
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1914 else
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1915 detected_double_format = unknown_format;
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1916 }
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1917 #else
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1918 detected_double_format = unknown_format;
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1919 #endif
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1920
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1921 #if SIZEOF_FLOAT == 4
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1922 {
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1923 float y = 16711938.0;
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1924 if (memcmp(&y, "\x4b\x7f\x01\x02", 4) == 0)
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1925 detected_float_format = ieee_big_endian_format;
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1926 else if (memcmp(&y, "\x02\x01\x7f\x4b", 4) == 0)
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1927 detected_float_format = ieee_little_endian_format;
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1928 else
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1929 detected_float_format = unknown_format;
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1930 }
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1931 #else
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1932 detected_float_format = unknown_format;
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1933 #endif
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1934
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1935 double_format = detected_double_format;
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1936 float_format = detected_float_format;
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1937
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1938 /* Init float info */
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1939 if (FloatInfoType.tp_name == 0)
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1940 PyStructSequence_InitType(&FloatInfoType, &floatinfo_desc);
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1941 }
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1942
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1943 int
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1944 PyFloat_ClearFreeList(void)
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1945 {
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1946 PyFloatObject *p;
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1947 PyFloatBlock *list, *next;
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1948 int i;
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1949 int u; /* remaining unfreed floats per block */
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1950 int freelist_size = 0;
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1951
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1952 list = block_list;
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1953 block_list = NULL;
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1954 free_list = NULL;
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1955 while (list != NULL) {
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1956 u = 0;
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1957 for (i = 0, p = &list->objects[0];
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1958 i < N_FLOATOBJECTS;
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1959 i++, p++) {
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1960 if (PyFloat_CheckExact(p) && Py_REFCNT(p) != 0)
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1961 u++;
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1962 }
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1963 next = list->next;
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1964 if (u) {
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1965 list->next = block_list;
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1966 block_list = list;
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1967 for (i = 0, p = &list->objects[0];
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1968 i < N_FLOATOBJECTS;
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1969 i++, p++) {
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1970 if (!PyFloat_CheckExact(p) ||
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1971 Py_REFCNT(p) == 0) {
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1972 Py_TYPE(p) = (struct _typeobject *)
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1973 free_list;
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1974 free_list = p;
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1975 }
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1976 }
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1977 }
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Antoine Pitrou <solipsis@pitrou.net>
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diff changeset
1978 else {
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parents: 59014
diff changeset
1979 PyMem_FREE(list);
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Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1980 }
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Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1981 freelist_size += u;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1982 list = next;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1983 }
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Antoine Pitrou <solipsis@pitrou.net>
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diff changeset
1984 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
1985 }
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
1986
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 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
1988 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
1989 {
61466
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Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1990 PyFloatObject *p;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1991 PyFloatBlock *list;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1992 int i;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1993 int u; /* total unfreed floats per block */
45145
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Christian Heimes <christian@cheimes.de>
parents: 45134
diff changeset
1994
61466
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Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1995 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
1996
61466
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Antoine Pitrou <solipsis@pitrou.net>
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diff changeset
1997 if (!Py_VerboseFlag)
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Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1998 return;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
1999 fprintf(stderr, "# cleanup floats");
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Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2000 if (!u) {
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Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2001 fprintf(stderr, "\n");
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Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2002 }
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Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2003 else {
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Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2004 fprintf(stderr,
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2005 ": %d unfreed float%s\n",
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2006 u, u == 1 ? "" : "s");
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Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2007 }
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Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2008 if (Py_VerboseFlag > 1) {
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2009 list = block_list;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2010 while (list != NULL) {
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2011 for (i = 0, p = &list->objects[0];
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2012 i < N_FLOATOBJECTS;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2013 i++, p++) {
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2014 if (PyFloat_CheckExact(p) &&
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2015 Py_REFCNT(p) != 0) {
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2016 char *buf = PyOS_double_to_string(
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2017 PyFloat_AS_DOUBLE(p), 'r',
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2018 0, 0, NULL);
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Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2019 if (buf) {
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2020 /* XXX(twouters) cast
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2021 refcount to long
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2022 until %zd is
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2023 universally
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2024 available
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2025 */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2026 fprintf(stderr,
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2027 "# <float at %p, refcnt=%ld, val=%s>\n",
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2028 p, (long)Py_REFCNT(p), buf);
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2029 PyMem_Free(buf);
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2030 }
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2031 }
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2032 }
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2033 list = list->next;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2034 }
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2035 }
5936
80d24364b932 Added _Fini() routines to free up some memory
Guido van Rossum <guido@python.org>
parents: 5504
diff changeset
2036 }
28335
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2037
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2038 /*----------------------------------------------------------------------------
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2039 * _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
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 int
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2042 _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
2043 {
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2044 if (float_format == unknown_format) {
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2045 unsigned char sign;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2046 int e;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2047 double f;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2048 unsigned int fbits;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2049 int incr = 1;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2050
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2051 if (le) {
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2052 p += 3;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2053 incr = -1;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2054 }
28335
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2055
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2056 if (x < 0) {
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2057 sign = 1;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2058 x = -x;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2059 }
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2060 else
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2061 sign = 0;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2062
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2063 f = frexp(x, &e);
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2064
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2065 /* Normalize f to be in the range [1.0, 2.0) */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2066 if (0.5 <= f && f < 1.0) {
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2067 f *= 2.0;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2068 e--;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2069 }
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2070 else if (f == 0.0)
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2071 e = 0;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2072 else {
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2073 PyErr_SetString(PyExc_SystemError,
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2074 "frexp() result out of range");
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Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2075 return -1;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2076 }
28335
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2077
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2078 if (e >= 128)
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2079 goto Overflow;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2080 else if (e < -126) {
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2081 /* Gradual underflow */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2082 f = ldexp(f, 126 + e);
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2083 e = 0;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2084 }
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2085 else if (!(e == 0 && f == 0.0)) {
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2086 e += 127;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2087 f -= 1.0; /* Get rid of leading 1 */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2088 }
28335
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2089
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2090 f *= 8388608.0; /* 2**23 */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2091 fbits = (unsigned int)(f + 0.5); /* Round */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2092 assert(fbits <= 8388608);
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2093 if (fbits >> 23) {
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2094 /* The carry propagated out of a string of 23 1 bits. */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2095 fbits = 0;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2096 ++e;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2097 if (e >= 255)
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2098 goto Overflow;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2099 }
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2100
61466
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Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2101 /* First byte */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2102 *p = (sign << 7) | (e >> 1);
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2103 p += incr;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2104
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2105 /* Second byte */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2106 *p = (char) (((e & 1) << 7) | (fbits >> 16));
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2107 p += incr;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2108
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2109 /* Third byte */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2110 *p = (fbits >> 8) & 0xFF;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2111 p += incr;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2112
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2113 /* Fourth byte */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2114 *p = fbits & 0xFF;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2115
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2116 /* Done */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2117 return 0;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2118
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2119 }
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2120 else {
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2121 float y = (float)x;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2122 const char *s = (char*)&y;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2123 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
2124
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2125 if (Py_IS_INFINITY(y) && !Py_IS_INFINITY(x))
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2126 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
2127
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2128 if ((float_format == ieee_little_endian_format && !le)
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2129 || (float_format == ieee_big_endian_format && le)) {
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2130 p += 3;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2131 incr = -1;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2132 }
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
2133
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2134 for (i = 0; i < 4; i++) {
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2135 *p = *s++;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2136 p += incr;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2137 }
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2138 return 0;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2139 }
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
2140 Overflow:
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2141 PyErr_SetString(PyExc_OverflowError,
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2142 "float too large to pack with f format");
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2143 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
2144 }
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2145
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2146 int
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2147 _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
2148 {
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2149 if (double_format == unknown_format) {
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2150 unsigned char sign;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2151 int e;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2152 double f;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2153 unsigned int fhi, flo;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2154 int incr = 1;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2155
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2156 if (le) {
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2157 p += 7;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2158 incr = -1;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2159 }
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2160
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2161 if (x < 0) {
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2162 sign = 1;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2163 x = -x;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2164 }
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2165 else
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2166 sign = 0;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2167
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2168 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
2169
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2170 /* Normalize f to be in the range [1.0, 2.0) */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2171 if (0.5 <= f && f < 1.0) {
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2172 f *= 2.0;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2173 e--;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2174 }
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2175 else if (f == 0.0)
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2176 e = 0;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2177 else {
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2178 PyErr_SetString(PyExc_SystemError,
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2179 "frexp() result out of range");
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2180 return -1;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2181 }
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2182
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2183 if (e >= 1024)
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2184 goto Overflow;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2185 else if (e < -1022) {
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2186 /* Gradual underflow */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2187 f = ldexp(f, 1022 + e);
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2188 e = 0;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2189 }
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2190 else if (!(e == 0 && f == 0.0)) {
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2191 e += 1023;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2192 f -= 1.0; /* Get rid of leading 1 */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2193 }
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2194
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2195 /* fhi receives the high 28 bits; flo the low 24 bits (== 52 bits) */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2196 f *= 268435456.0; /* 2**28 */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2197 fhi = (unsigned int)f; /* Truncate */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2198 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
2199
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2200 f -= (double)fhi;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2201 f *= 16777216.0; /* 2**24 */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2202 flo = (unsigned int)(f + 0.5); /* Round */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2203 assert(flo <= 16777216);
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2204 if (flo >> 24) {
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2205 /* The carry propagated out of a string of 24 1 bits. */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2206 flo = 0;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2207 ++fhi;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2208 if (fhi >> 28) {
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2209 /* And it also progagated out of the next 28 bits. */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2210 fhi = 0;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2211 ++e;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2212 if (e >= 2047)
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2213 goto Overflow;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2214 }
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2215 }
28335
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2216
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2217 /* First byte */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2218 *p = (sign << 7) | (e >> 4);
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2219 p += incr;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2220
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2221 /* Second byte */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2222 *p = (unsigned char) (((e & 0xF) << 4) | (fhi >> 24));
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2223 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
2224
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2225 /* Third byte */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2226 *p = (fhi >> 16) & 0xFF;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2227 p += incr;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2228
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2229 /* Fourth byte */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2230 *p = (fhi >> 8) & 0xFF;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2231 p += incr;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2232
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2233 /* Fifth byte */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2234 *p = fhi & 0xFF;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2235 p += incr;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2236
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2237 /* Sixth byte */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2238 *p = (flo >> 16) & 0xFF;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2239 p += incr;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2240
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2241 /* Seventh byte */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2242 *p = (flo >> 8) & 0xFF;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2243 p += incr;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2244
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2245 /* Eighth byte */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2246 *p = flo & 0xFF;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2247 p += incr;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2248
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2249 /* Done */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2250 return 0;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2251
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2252 Overflow:
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2253 PyErr_SetString(PyExc_OverflowError,
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2254 "float too large to pack with d format");
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2255 return -1;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2256 }
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2257 else {
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2258 const char *s = (char*)&x;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2259 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
2260
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2261 if ((double_format == ieee_little_endian_format && !le)
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2262 || (double_format == ieee_big_endian_format && le)) {
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2263 p += 7;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2264 incr = -1;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2265 }
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2266
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2267 for (i = 0; i < 8; i++) {
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2268 *p = *s++;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2269 p += incr;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2270 }
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2271 return 0;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2272 }
28335
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2273 }
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2274
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2275 double
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2276 _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
2277 {
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2278 if (float_format == unknown_format) {
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2279 unsigned char sign;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2280 int e;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2281 unsigned int f;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2282 double x;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2283 int incr = 1;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2284
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2285 if (le) {
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2286 p += 3;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2287 incr = -1;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2288 }
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2289
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2290 /* First byte */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2291 sign = (*p >> 7) & 1;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2292 e = (*p & 0x7F) << 1;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2293 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
2294
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2295 /* Second byte */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2296 e |= (*p >> 7) & 1;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2297 f = (*p & 0x7F) << 16;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2298 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
2299
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2300 if (e == 255) {
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2301 PyErr_SetString(
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2302 PyExc_ValueError,
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2303 "can't unpack IEEE 754 special value "
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2304 "on non-IEEE platform");
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2305 return -1;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2306 }
28335
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2307
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2308 /* Third byte */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2309 f |= *p << 8;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2310 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
2311
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2312 /* Fourth byte */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2313 f |= *p;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2314
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2315 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
2316
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2317 /* XXX This sadly ignores Inf/NaN issues */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2318 if (e == 0)
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2319 e = -126;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2320 else {
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2321 x += 1.0;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2322 e -= 127;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2323 }
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2324 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
2325
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2326 if (sign)
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2327 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
2328
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2329 return x;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2330 }
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2331 else {
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2332 float x;
35987
8eda1a58a490 Fix bug
Michael W. Hudson <mwh@python.net>
parents: 35178
diff changeset
2333
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2334 if ((float_format == ieee_little_endian_format && !le)
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2335 || (float_format == ieee_big_endian_format && le)) {
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2336 char buf[4];
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2337 char *d = &buf[3];
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2338 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
2339
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2340 for (i = 0; i < 4; i++) {
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2341 *d-- = *p++;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2342 }
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2343 memcpy(&x, buf, 4);
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2344 }
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2345 else {
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2346 memcpy(&x, p, 4);
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2347 }
35987
8eda1a58a490 Fix bug
Michael W. Hudson <mwh@python.net>
parents: 35178
diff changeset
2348
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2349 return x;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2350 }
28335
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2351 }
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2352
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2353 double
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2354 _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
2355 {
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2356 if (double_format == unknown_format) {
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2357 unsigned char sign;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2358 int e;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2359 unsigned int fhi, flo;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2360 double x;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2361 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
2362
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2363 if (le) {
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2364 p += 7;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2365 incr = -1;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2366 }
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2367
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2368 /* First byte */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2369 sign = (*p >> 7) & 1;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2370 e = (*p & 0x7F) << 4;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2371
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2372 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
2373
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2374 /* Second byte */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2375 e |= (*p >> 4) & 0xF;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2376 fhi = (*p & 0xF) << 24;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2377 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
2378
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2379 if (e == 2047) {
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2380 PyErr_SetString(
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2381 PyExc_ValueError,
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2382 "can't unpack IEEE 754 special value "
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2383 "on non-IEEE platform");
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2384 return -1.0;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2385 }
28335
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2386
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2387 /* Third byte */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2388 fhi |= *p << 16;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2389 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
2390
61466
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Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2391 /* Fourth byte */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2392 fhi |= *p << 8;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2393 p += incr;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2394
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2395 /* Fifth byte */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2396 fhi |= *p;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2397 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
2398
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2399 /* Sixth byte */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2400 flo = *p << 16;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2401 p += incr;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2402
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2403 /* Seventh byte */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2404 flo |= *p << 8;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2405 p += incr;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2406
61466
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Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2407 /* Eighth byte */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2408 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
2409
61466
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Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2410 x = (double)fhi + (double)flo / 16777216.0; /* 2**24 */
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2411 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
2412
61466
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Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2413 if (e == 0)
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2414 e = -1022;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2415 else {
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2416 x += 1.0;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2417 e -= 1023;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2418 }
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2419 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
2420
61466
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Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2421 if (sign)
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Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2422 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
2423
61466
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Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2424 return x;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2425 }
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2426 else {
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2427 double x;
35987
8eda1a58a490 Fix bug
Michael W. Hudson <mwh@python.net>
parents: 35178
diff changeset
2428
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2429 if ((double_format == ieee_little_endian_format && !le)
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2430 || (double_format == ieee_big_endian_format && le)) {
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2431 char buf[8];
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Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2432 char *d = &buf[7];
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2433 int i;
35987
8eda1a58a490 Fix bug
Michael W. Hudson <mwh@python.net>
parents: 35178
diff changeset
2434
61466
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Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2435 for (i = 0; i < 8; i++) {
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Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2436 *d-- = *p++;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2437 }
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2438 memcpy(&x, buf, 8);
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Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2439 }
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
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parents: 59014
diff changeset
2440 else {
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Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2441 memcpy(&x, p, 8);
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2442 }
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parents: 59014
diff changeset
2443
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2444 return x;
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 59014
diff changeset
2445 }
28335
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2446 }