Mercurial > cpython-lru_cache-weakref

annotate Objects/floatobject.c @ 73798:6cde416ef03b

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Credit Per Øyvind Karlsen for the initial implementation of the lzma module (issue #6715).
author Nadeem Vawda <nadeem.vawda@gmail.com>
date Thu, 01 Dec 2011 01:18:27 +0200
parents d76338eacf7c
children 265d35e8fe82
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1
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2 /* Float object implementation */
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3
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4 /* XXX There should be overflow checks here, but it's hard to check
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5 for any kind of float exception without losing portability. */
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6
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7 #include "Python.h"
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8
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9 #include <ctype.h>
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10 #include <float.h>
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11
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12 #undef MAX
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13 #undef MIN
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14 #define MAX(x, y) ((x) < (y) ? (y) : (x))
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15 #define MIN(x, y) ((x) < (y) ? (x) : (y))
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17
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18 /* Special free list
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19
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20 Since some Python programs can spend much of their time allocating
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21 and deallocating floats, these operations should be very fast.
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22 Therefore we use a dedicated allocation scheme with a much lower
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23 overhead (in space and time) than straight malloc(): a simple
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24 dedicated free list, filled when necessary with memory from malloc().
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25
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26 block_list is a singly-linked list of all PyFloatBlocks ever allocated,
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27 linked via their next members. PyFloatBlocks are never returned to the
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28 system before shutdown (PyFloat_Fini).
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29
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30 free_list is a singly-linked list of available PyFloatObjects, linked
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31 via abuse of their ob_type members.
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32 */
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33
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34 #define BLOCK_SIZE 1000 /* 1K less typical malloc overhead */
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35 #define BHEAD_SIZE 8 /* Enough for a 64-bit pointer */
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36 #define N_FLOATOBJECTS ((BLOCK_SIZE - BHEAD_SIZE) / sizeof(PyFloatObject))
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37
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38 struct _floatblock {
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39 struct _floatblock *next;
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40 PyFloatObject objects[N_FLOATOBJECTS];
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41 };
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43 typedef struct _floatblock PyFloatBlock;
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44
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45 static PyFloatBlock *block_list = NULL;
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46 static PyFloatObject *free_list = NULL;
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47
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48 static PyFloatObject *
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49 fill_free_list(void)
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50 {
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51 PyFloatObject *p, *q;
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52 /* XXX Float blocks escape the object heap. Use PyObject_MALLOC ??? */
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53 p = (PyFloatObject *) PyMem_MALLOC(sizeof(PyFloatBlock));
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54 if (p == NULL)
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55 return (PyFloatObject *) PyErr_NoMemory();
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56 ((PyFloatBlock *)p)->next = block_list;
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57 block_list = (PyFloatBlock *)p;
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58 p = &((PyFloatBlock *)p)->objects[0];
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59 q = p + N_FLOATOBJECTS;
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60 while (--q > p)
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61 Py_TYPE(q) = (struct _typeobject *)(q-1);
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62 Py_TYPE(q) = NULL;
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63 return p + N_FLOATOBJECTS - 1;
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64 }
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65
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66 double
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67 PyFloat_GetMax(void)
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68 {
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69 return DBL_MAX;
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70 }
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71
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72 double
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73 PyFloat_GetMin(void)
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74 {
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75 return DBL_MIN;
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76 }
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77
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78 static PyTypeObject FloatInfoType;
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79
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80 PyDoc_STRVAR(floatinfo__doc__,
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81 "sys.float_info\n\
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82 \n\
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83 A structseq holding information about the float type. It contains low level\n\
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84 information about the precision and internal representation. Please study\n\
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85 your system's :file:`float.h` for more information.");
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86
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87 static PyStructSequence_Field floatinfo_fields[] = {
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88 {"max", "DBL_MAX -- maximum representable finite float"},
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89 {"max_exp", "DBL_MAX_EXP -- maximum int e such that radix**(e-1) "
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90 "is representable"},
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91 {"max_10_exp", "DBL_MAX_10_EXP -- maximum int e such that 10**e "
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92 "is representable"},
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93 {"min", "DBL_MIN -- Minimum positive normalizer float"},
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94 {"min_exp", "DBL_MIN_EXP -- minimum int e such that radix**(e-1) "
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95 "is a normalized float"},
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96 {"min_10_exp", "DBL_MIN_10_EXP -- minimum int e such that 10**e is "
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97 "a normalized"},
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98 {"dig", "DBL_DIG -- digits"},
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99 {"mant_dig", "DBL_MANT_DIG -- mantissa digits"},
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100 {"epsilon", "DBL_EPSILON -- Difference between 1 and the next "
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101 "representable float"},
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102 {"radix", "FLT_RADIX -- radix of exponent"},
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103 {"rounds", "FLT_ROUNDS -- addition rounds"},
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104 {0}
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105 };
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106
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107 static PyStructSequence_Desc floatinfo_desc = {
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108 "sys.float_info", /* name */
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109 floatinfo__doc__, /* doc */
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110 floatinfo_fields, /* fields */
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111 11
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112 };
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113
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114 PyObject *
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115 PyFloat_GetInfo(void)
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116 {
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117 PyObject* floatinfo;
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118 int pos = 0;
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119
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120 floatinfo = PyStructSequence_New(&FloatInfoType);
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121 if (floatinfo == NULL) {
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122 return NULL;
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123 }
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124
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125 #define SetIntFlag(flag) \
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126 PyStructSequence_SET_ITEM(floatinfo, pos++, PyLong_FromLong(flag))
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127 #define SetDblFlag(flag) \
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128 PyStructSequence_SET_ITEM(floatinfo, pos++, PyFloat_FromDouble(flag))
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129
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130 SetDblFlag(DBL_MAX);
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131 SetIntFlag(DBL_MAX_EXP);
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132 SetIntFlag(DBL_MAX_10_EXP);
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133 SetDblFlag(DBL_MIN);
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134 SetIntFlag(DBL_MIN_EXP);
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135 SetIntFlag(DBL_MIN_10_EXP);
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136 SetIntFlag(DBL_DIG);
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137 SetIntFlag(DBL_MANT_DIG);
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138 SetDblFlag(DBL_EPSILON);
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139 SetIntFlag(FLT_RADIX);
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140 SetIntFlag(FLT_ROUNDS);
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141 #undef SetIntFlag
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142 #undef SetDblFlag
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143
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144 if (PyErr_Occurred()) {
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145 Py_CLEAR(floatinfo);
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146 return NULL;
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147 }
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148 return floatinfo;
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149 }
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150
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151 PyObject *
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152 PyFloat_FromDouble(double fval)
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153 {
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154 register PyFloatObject *op;
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155 if (free_list == NULL) {
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156 if ((free_list = fill_free_list()) == NULL)
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157 return NULL;
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158 }
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159 /* Inline PyObject_New */
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160 op = free_list;
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161 free_list = (PyFloatObject *)Py_TYPE(op);
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162 PyObject_INIT(op, &PyFloat_Type);
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163 op->ob_fval = fval;
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164 return (PyObject *) op;
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165 }
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166
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167 PyObject *
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168 PyFloat_FromString(PyObject *v)
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169 {
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170 const char *s, *last, *end;
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171 double x;
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172 PyObject *s_buffer = NULL;
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173 Py_ssize_t len;
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174 PyObject *result = NULL;
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175
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176 if (PyUnicode_Check(v)) {
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177 s_buffer = _PyUnicode_TransformDecimalAndSpaceToASCII(v);
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178 if (s_buffer == NULL)
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179 return NULL;
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180 s = PyUnicode_AsUTF8AndSize(s_buffer, &len);
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181 if (s == NULL) {
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182 Py_DECREF(s_buffer);
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183 return NULL;
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184 }
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185 }
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186 else if (PyObject_AsCharBuffer(v, &s, &len)) {
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187 PyErr_SetString(PyExc_TypeError,
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188 "float() argument must be a string or a number");
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189 return NULL;
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190 }
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191 last = s + len;
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192 /* strip space */
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193 while (s < last && Py_ISSPACE(*s))
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194 s++;
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195 while (s < last - 1 && Py_ISSPACE(last[-1]))
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196 last--;
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197 /* We don't care about overflow or underflow. If the platform
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198 * supports them, infinities and signed zeroes (on underflow) are
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199 * fine. */
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200 x = PyOS_string_to_double(s, (char **)&end, NULL);
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201 if (end != last) {
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202 PyErr_Format(PyExc_ValueError,
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203 "could not convert string to float: "
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204 "%R", v);
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205 result = NULL;
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206 }
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207 else if (x == -1.0 && PyErr_Occurred())
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208 result = NULL;
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209 else
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210 result = PyFloat_FromDouble(x);
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211
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212 Py_XDECREF(s_buffer);
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213 return result;
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214 }
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215
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216 static void
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217 float_dealloc(PyFloatObject *op)
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218 {
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219 if (PyFloat_CheckExact(op)) {
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220 Py_TYPE(op) = (struct _typeobject *)free_list;
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221 free_list = op;
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222 }
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223 else
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224 Py_TYPE(op)->tp_free((PyObject *)op);
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225 }
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226
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227 double
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228 PyFloat_AsDouble(PyObject *op)
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229 {
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230 PyNumberMethods *nb;
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231 PyFloatObject *fo;
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232 double val;
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233
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234 if (op && PyFloat_Check(op))
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235 return PyFloat_AS_DOUBLE((PyFloatObject*) op);
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236
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237 if (op == NULL) {
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238 PyErr_BadArgument();
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239 return -1;
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240 }
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241
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242 if ((nb = Py_TYPE(op)->tp_as_number) == NULL || nb->nb_float == NULL) {
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243 PyErr_SetString(PyExc_TypeError, "a float is required");
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244 return -1;
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245 }
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246
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247 fo = (PyFloatObject*) (*nb->nb_float) (op);
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248 if (fo == NULL)
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249 return -1;
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250 if (!PyFloat_Check(fo)) {
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251 PyErr_SetString(PyExc_TypeError,
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252 "nb_float should return float object");
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253 return -1;
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254 }
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255
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256 val = PyFloat_AS_DOUBLE(fo);
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257 Py_DECREF(fo);
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258
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259 return val;
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260 }
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261
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262 /* Macro and helper that convert PyObject obj to a C double and store
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263 the value in dbl. If conversion to double raises an exception, obj is
21354
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Tim Peters <tim.peters@gmail.com>
parents: 21353
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264 set to NULL, and the function invoking this macro returns NULL. If
fbddb64d21c2 float_floor_div: An expression like 3.//1j crashed the interpreter, or
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parents: 21353
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265 obj is not of float, int or long type, Py_NotImplemented is incref'ed,
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266 stored in obj, and returned from the function invoking this macro.
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267 */
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268 #define CONVERT_TO_DOUBLE(obj, dbl) \
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269 if (PyFloat_Check(obj)) \
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270 dbl = PyFloat_AS_DOUBLE(obj); \
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271 else if (convert_to_double(&(obj), &(dbl)) < 0) \
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272 return obj;
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273
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274 /* Methods */
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275
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276 static int
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277 convert_to_double(PyObject **v, double *dbl)
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278 {
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279 register PyObject *obj = *v;
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280
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281 if (PyLong_Check(obj)) {
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282 *dbl = PyLong_AsDouble(obj);
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283 if (*dbl == -1.0 && PyErr_Occurred()) {
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284 *v = NULL;
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285 return -1;
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286 }
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287 }
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288 else {
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289 Py_INCREF(Py_NotImplemented);
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290 *v = Py_NotImplemented;
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291 return -1;
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292 }
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293 return 0;
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294 }
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295
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296 static PyObject *
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297 float_repr(PyFloatObject *v)
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298 {
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299 PyObject *result;
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300 char *buf = PyOS_double_to_string(PyFloat_AS_DOUBLE(v),
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301 '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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302 Py_DTSF_ADD_DOT_0,
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303 NULL);
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304 if (!buf)
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305 return PyErr_NoMemory();
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306 result = PyUnicode_FromString(buf);
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307 PyMem_Free(buf);
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308 return result;
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309 }
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Guido van Rossum <guido@python.org>
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310
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311 /* Comparison is pretty much a nightmare. When comparing float to float,
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312 * we do it as straightforwardly (and long-windedly) as conceivable, so
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313 * that, e.g., Python x == y delivers the same result as the platform
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314 * C x == y when x and/or y is a NaN.
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315 * When mixing float with an integer type, there's no good *uniform* approach.
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316 * Converting the double to an integer obviously doesn't work, since we
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317 * may lose info from fractional bits. Converting the integer to a double
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318 * also has two failure modes: (1) a long int may trigger overflow (too
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319 * large to fit in the dynamic range of a C double); (2) even a C long may have
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320 * more bits than fit in a C double (e.g., on a a 64-bit box long may have
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321 * 63 bits of precision, but a C double probably has only 53), and then
702367da2c72 SF bug #513866: Float/long comparison anomaly.
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322 * we can falsely claim equality when low-order integer bits are lost by
702367da2c72 SF bug #513866: Float/long comparison anomaly.
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323 * coercion to double. So this part is painful too.
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324 */
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325
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326 static PyObject*
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327 float_richcompare(PyObject *v, PyObject *w, int op)
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328 {
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329 double i, j;
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330 int r = 0;
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331
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332 assert(PyFloat_Check(v));
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333 i = PyFloat_AS_DOUBLE(v);
33547
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334
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335 /* Switch on the type of w. Set i and j to doubles to be compared,
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336 * and op to the richcomp to use.
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337 */
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338 if (PyFloat_Check(w))
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339 j = PyFloat_AS_DOUBLE(w);
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340
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341 else if (!Py_IS_FINITE(i)) {
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342 if (PyLong_Check(w))
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343 /* If i is an infinity, its magnitude exceeds any
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344 * finite integer, so it doesn't matter which int we
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345 * compare i with. If i is a NaN, similarly.
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346 */
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347 j = 0.0;
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348 else
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349 goto Unimplemented;
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350 }
33547
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351
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352 else if (PyLong_Check(w)) {
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353 int vsign = i == 0.0 ? 0 : i < 0.0 ? -1 : 1;
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354 int wsign = _PyLong_Sign(w);
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355 size_t nbits;
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356 int exponent;
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357
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358 if (vsign != wsign) {
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359 /* Magnitudes are irrelevant -- the signs alone
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360 * determine the outcome.
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361 */
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362 i = (double)vsign;
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363 j = (double)wsign;
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364 goto Compare;
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365 }
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366 /* The signs are the same. */
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367 /* Convert w to a double if it fits. In particular, 0 fits. */
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368 nbits = _PyLong_NumBits(w);
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369 if (nbits == (size_t)-1 && PyErr_Occurred()) {
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370 /* This long is so large that size_t isn't big enough
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371 * to hold the # of bits. Replace with little doubles
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372 * that give the same outcome -- w is so large that
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373 * its magnitude must exceed the magnitude of any
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374 * finite float.
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375 */
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376 PyErr_Clear();
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377 i = (double)vsign;
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378 assert(wsign != 0);
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379 j = wsign * 2.0;
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380 goto Compare;
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381 }
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382 if (nbits <= 48) {
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383 j = PyLong_AsDouble(w);
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384 /* It's impossible that <= 48 bits overflowed. */
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385 assert(j != -1.0 || ! PyErr_Occurred());
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386 goto Compare;
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387 }
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388 assert(wsign != 0); /* else nbits was 0 */
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389 assert(vsign != 0); /* if vsign were 0, then since wsign is
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390 * not 0, we would have taken the
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391 * vsign != wsign branch at the start */
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392 /* We want to work with non-negative numbers. */
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393 if (vsign < 0) {
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diff changeset
394 /* "Multiply both sides" by -1; this also swaps the
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
395 * comparator.
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parents: 54232
diff changeset
396 */
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parents: 54232
diff changeset
397 i = -i;
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parents: 54232
diff changeset
398 op = _Py_SwappedOp[op];
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parents: 54232
diff changeset
399 }
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parents: 54232
diff changeset
400 assert(i > 0.0);
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
401 (void) frexp(i, &exponent);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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diff changeset
402 /* exponent is the # of bits in v before the radix point;
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diff changeset
403 * we know that nbits (the # of bits in w) > 48 at this point
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parents: 54232
diff changeset
404 */
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parents: 54232
diff changeset
405 if (exponent < 0 || (size_t)exponent < nbits) {
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
406 i = 1.0;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
407 j = 2.0;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
408 goto Compare;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
409 }
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parents: 54232
diff changeset
410 if ((size_t)exponent > nbits) {
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parents: 54232
diff changeset
411 i = 2.0;
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parents: 54232
diff changeset
412 j = 1.0;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
413 goto Compare;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
414 }
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diff changeset
415 /* v and w have the same number of bits before the radix
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diff changeset
416 * point. Construct two longs that have the same comparison
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diff changeset
417 * outcome.
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parents: 54232
diff changeset
418 */
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parents: 54232
diff changeset
419 {
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parents: 54232
diff changeset
420 double fracpart;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
421 double intpart;
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parents: 54232
diff changeset
422 PyObject *result = NULL;
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diff changeset
423 PyObject *one = NULL;
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diff changeset
424 PyObject *vv = NULL;
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Antoine Pitrou <solipsis@pitrou.net>
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diff changeset
425 PyObject *ww = w;
33547
702367da2c72 SF bug #513866: Float/long comparison anomaly.
Tim Peters <tim.peters@gmail.com>
parents: 32533
diff changeset
426
61467
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diff changeset
427 if (wsign < 0) {
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diff changeset
428 ww = PyNumber_Negative(w);
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diff changeset
429 if (ww == NULL)
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Antoine Pitrou <solipsis@pitrou.net>
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diff changeset
430 goto Error;
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diff changeset
431 }
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diff changeset
432 else
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diff changeset
433 Py_INCREF(ww);
33547
702367da2c72 SF bug #513866: Float/long comparison anomaly.
Tim Peters <tim.peters@gmail.com>
parents: 32533
diff changeset
434
61467
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diff changeset
435 fracpart = modf(i, &intpart);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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parents: 54232
diff changeset
436 vv = PyLong_FromDouble(intpart);
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
437 if (vv == NULL)
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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parents: 54232
diff changeset
438 goto Error;
33547
702367da2c72 SF bug #513866: Float/long comparison anomaly.
Tim Peters <tim.peters@gmail.com>
parents: 32533
diff changeset
439
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
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diff changeset
440 if (fracpart != 0.0) {
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
441 /* Shift left, and or a 1 bit into vv
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diff changeset
442 * to represent the lost fraction.
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diff changeset
443 */
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diff changeset
444 PyObject *temp;
33547
702367da2c72 SF bug #513866: Float/long comparison anomaly.
Tim Peters <tim.peters@gmail.com>
parents: 32533
diff changeset
445
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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diff changeset
446 one = PyLong_FromLong(1);
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diff changeset
447 if (one == NULL)
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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diff changeset
448 goto Error;
33547
702367da2c72 SF bug #513866: Float/long comparison anomaly.
Tim Peters <tim.peters@gmail.com>
parents: 32533
diff changeset
449
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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diff changeset
450 temp = PyNumber_Lshift(ww, one);
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diff changeset
451 if (temp == NULL)
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diff changeset
452 goto Error;
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diff changeset
453 Py_DECREF(ww);
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diff changeset
454 ww = temp;
33547
702367da2c72 SF bug #513866: Float/long comparison anomaly.
Tim Peters <tim.peters@gmail.com>
parents: 32533
diff changeset
455
61467
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diff changeset
456 temp = PyNumber_Lshift(vv, one);
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diff changeset
457 if (temp == NULL)
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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diff changeset
458 goto Error;
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parents: 54232
diff changeset
459 Py_DECREF(vv);
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diff changeset
460 vv = temp;
33547
702367da2c72 SF bug #513866: Float/long comparison anomaly.
Tim Peters <tim.peters@gmail.com>
parents: 32533
diff changeset
461
61467
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diff changeset
462 temp = PyNumber_Or(vv, one);
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diff changeset
463 if (temp == NULL)
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diff changeset
464 goto Error;
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diff changeset
465 Py_DECREF(vv);
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diff changeset
466 vv = temp;
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diff changeset
467 }
33547
702367da2c72 SF bug #513866: Float/long comparison anomaly.
Tim Peters <tim.peters@gmail.com>
parents: 32533
diff changeset
468
61467
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diff changeset
469 r = PyObject_RichCompareBool(vv, ww, op);
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diff changeset
470 if (r < 0)
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diff changeset
471 goto Error;
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diff changeset
472 result = PyBool_FromLong(r);
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parents: 54232
diff changeset
473 Error:
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diff changeset
474 Py_XDECREF(vv);
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
475 Py_XDECREF(ww);
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
476 Py_XDECREF(one);
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
477 return result;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
478 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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diff changeset
479 } /* else if (PyLong_Check(w)) */
33547
702367da2c72 SF bug #513866: Float/long comparison anomaly.
Tim Peters <tim.peters@gmail.com>
parents: 32533
diff changeset
480
61467
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Antoine Pitrou <solipsis@pitrou.net>
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diff changeset
481 else /* w isn't float, int, or long */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
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diff changeset
482 goto Unimplemented;
33547
702367da2c72 SF bug #513866: Float/long comparison anomaly.
Tim Peters <tim.peters@gmail.com>
parents: 32533
diff changeset
483
702367da2c72 SF bug #513866: Float/long comparison anomaly.
Tim Peters <tim.peters@gmail.com>
parents: 32533
diff changeset
484 Compare:
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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parents: 54232
diff changeset
485 PyFPE_START_PROTECT("richcompare", return NULL)
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
486 switch (op) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
487 case Py_EQ:
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
488 r = i == j;
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parents: 54232
diff changeset
489 break;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
490 case Py_NE:
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
491 r = i != j;
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parents: 54232
diff changeset
492 break;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
493 case Py_LE:
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
494 r = i <= j;
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parents: 54232
diff changeset
495 break;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
496 case Py_GE:
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
497 r = i >= j;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
498 break;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
499 case Py_LT:
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
500 r = i < j;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
501 break;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
502 case Py_GT:
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
503 r = i > j;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
504 break;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
505 }
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
506 PyFPE_END_PROTECT(r)
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
507 return PyBool_FromLong(r);
33547
702367da2c72 SF bug #513866: Float/long comparison anomaly.
Tim Peters <tim.peters@gmail.com>
parents: 32533
diff changeset
508
702367da2c72 SF bug #513866: Float/long comparison anomaly.
Tim Peters <tim.peters@gmail.com>
parents: 32533
diff changeset
509 Unimplemented:
71810
d0b0fcbb40db Replace Py_NotImplemented returns with the macro form Py_RETURN_NOTIMPLEMENTED.
Brian Curtin <brian@python.org>
parents: 69498
diff changeset
510 Py_RETURN_NOTIMPLEMENTED;
31553
a6d8d5ace6a7 "Fix" (for certain configurations of the planets, including
Michael W. Hudson <mwh@python.net>
parents: 31384
diff changeset
511 }
a6d8d5ace6a7 "Fix" (for certain configurations of the planets, including
Michael W. Hudson <mwh@python.net>
parents: 31384
diff changeset
512
65494
e8969fb822fc make hashes always the size of pointers; introduce Py_hash_t #9778
Benjamin Peterson <benjamin@python.org>
parents: 63750
diff changeset
513 static Py_hash_t
13454
fcc75a3748f5 ANSI-fication of the sources.
Fred Drake <fdrake@acm.org>
parents: 13447
diff changeset
514 float_hash(PyFloatObject *v)
1257
1cabc2b6c970 * Changed all copyright messages to include 1993.
Guido van Rossum <guido@python.org>
parents: 1252
diff changeset
515 {
61467
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
516 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
517 }
1cabc2b6c970 * Changed all copyright messages to include 1993.
Guido van Rossum <guido@python.org>
parents: 1252
diff changeset
518
5396
d1447950fa04 Quickly renamed the last directory.
Guido van Rossum <guido@python.org>
parents: 5197
diff changeset
519 static PyObject *
15723
ac7ae3ead88a Make float a new style number type.
Neil Schemenauer <nascheme@enme.ucalgary.ca>
parents: 15318
diff changeset
520 float_add(PyObject *v, PyObject *w)
6
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
521 {
61467
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
522 double a,b;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
523 CONVERT_TO_DOUBLE(v, a);
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
524 CONVERT_TO_DOUBLE(w, b);
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
525 PyFPE_START_PROTECT("add", return 0)
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
526 a = a + b;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
527 PyFPE_END_PROTECT(a)
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
528 return PyFloat_FromDouble(a);
6
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
529 }
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
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_sub(PyObject *v, PyObject *w)
6
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533 {
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534 double a,b;
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535 CONVERT_TO_DOUBLE(v, a);
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536 CONVERT_TO_DOUBLE(w, b);
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537 PyFPE_START_PROTECT("subtract", 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_mul(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("multiply", 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_div(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 if (b == 0.0) {
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562 PyErr_SetString(PyExc_ZeroDivisionError,
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563 "float division by zero");
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564 return NULL;
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565 }
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566 PyFPE_START_PROTECT("divide", return 0)
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567 a = a / b;
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568 PyFPE_END_PROTECT(a)
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569 return PyFloat_FromDouble(a);
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570 }
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571
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572 static PyObject *
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573 float_rem(PyObject *v, PyObject *w)
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574 {
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575 double vx, wx;
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576 double mod;
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577 CONVERT_TO_DOUBLE(v, vx);
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578 CONVERT_TO_DOUBLE(w, wx);
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579 if (wx == 0.0) {
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580 PyErr_SetString(PyExc_ZeroDivisionError,
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581 "float modulo");
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582 return NULL;
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583 }
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584 PyFPE_START_PROTECT("modulo", return 0)
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585 mod = fmod(vx, wx);
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586 if (mod) {
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587 /* ensure the remainder has the same sign as the denominator */
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588 if ((wx < 0) != (mod < 0)) {
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589 mod += wx;
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590 }
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591 }
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592 else {
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593 /* the remainder is zero, and in the presence of signed zeroes
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594 fmod returns different results across platforms; ensure
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595 it has the same sign as the denominator. */
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596 mod = copysign(0.0, wx);
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597 }
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598 PyFPE_END_PROTECT(mod)
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599 return PyFloat_FromDouble(mod);
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600 }
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601
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602 static PyObject *
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603 float_divmod(PyObject *v, PyObject *w)
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604 {
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605 double vx, wx;
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606 double div, mod, floordiv;
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607 CONVERT_TO_DOUBLE(v, vx);
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608 CONVERT_TO_DOUBLE(w, wx);
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609 if (wx == 0.0) {
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610 PyErr_SetString(PyExc_ZeroDivisionError, "float divmod()");
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611 return NULL;
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612 }
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613 PyFPE_START_PROTECT("divmod", return 0)
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614 mod = fmod(vx, wx);
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615 /* fmod is typically exact, so vx-mod is *mathematically* an
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616 exact multiple of wx. But this is fp arithmetic, and fp
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617 vx - mod is an approximation; the result is that div may
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618 not be an exact integral value after the division, although
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619 it will always be very close to one.
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620 */
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621 div = (vx - mod) / wx;
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622 if (mod) {
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623 /* ensure the remainder has the same sign as the denominator */
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624 if ((wx < 0) != (mod < 0)) {
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625 mod += wx;
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626 div -= 1.0;
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627 }
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628 }
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629 else {
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630 /* the remainder is zero, and in the presence of signed zeroes
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631 fmod returns different results across platforms; ensure
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632 it has the same sign as the denominator. */
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633 mod = copysign(0.0, wx);
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634 }
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635 /* snap quotient to nearest integral value */
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636 if (div) {
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637 floordiv = floor(div);
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638 if (div - floordiv > 0.5)
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639 floordiv += 1.0;
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640 }
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641 else {
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642 /* div is zero - get the same sign as the true quotient */
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643 floordiv = copysign(0.0, vx / wx); /* zero w/ sign of vx/wx */
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644 }
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645 PyFPE_END_PROTECT(floordiv)
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646 return Py_BuildValue("(dd)", floordiv, mod);
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647 }
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648
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649 static PyObject *
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650 float_floor_div(PyObject *v, PyObject *w)
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651 {
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652 PyObject *t, *r;
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653
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654 t = float_divmod(v, w);
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655 if (t == NULL || t == Py_NotImplemented)
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656 return t;
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657 assert(PyTuple_CheckExact(t));
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658 r = PyTuple_GET_ITEM(t, 0);
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659 Py_INCREF(r);
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660 Py_DECREF(t);
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661 return r;
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662 }
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663
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664 /* determine whether x is an odd integer or not; assumes that
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665 x is not an infinity or nan. */
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666 #define DOUBLE_IS_ODD_INTEGER(x) (fmod(fabs(x), 2.0) == 1.0)
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667
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668 static PyObject *
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669 float_pow(PyObject *v, PyObject *w, PyObject *z)
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670 {
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671 double iv, iw, ix;
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672 int negate_result = 0;
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673
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674 if ((PyObject *)z != Py_None) {
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675 PyErr_SetString(PyExc_TypeError, "pow() 3rd argument not "
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676 "allowed unless all arguments are integers");
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677 return NULL;
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678 }
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679
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680 CONVERT_TO_DOUBLE(v, iv);
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681 CONVERT_TO_DOUBLE(w, iw);
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682
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683 /* Sort out special cases here instead of relying on pow() */
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684 if (iw == 0) { /* v**0 is 1, even 0**0 */
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685 return PyFloat_FromDouble(1.0);
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686 }
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687 if (Py_IS_NAN(iv)) { /* nan**w = nan, unless w == 0 */
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688 return PyFloat_FromDouble(iv);
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689 }
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690 if (Py_IS_NAN(iw)) { /* v**nan = nan, unless v == 1; 1**nan = 1 */
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691 return PyFloat_FromDouble(iv == 1.0 ? 1.0 : iw);
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692 }
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693 if (Py_IS_INFINITY(iw)) {
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694 /* v**inf is: 0.0 if abs(v) < 1; 1.0 if abs(v) == 1; inf if
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695 * abs(v) > 1 (including case where v infinite)
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696 *
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697 * v**-inf is: inf if abs(v) < 1; 1.0 if abs(v) == 1; 0.0 if
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698 * abs(v) > 1 (including case where v infinite)
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699 */
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700 iv = fabs(iv);
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701 if (iv == 1.0)
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702 return PyFloat_FromDouble(1.0);
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703 else if ((iw > 0.0) == (iv > 1.0))
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704 return PyFloat_FromDouble(fabs(iw)); /* return inf */
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705 else
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706 return PyFloat_FromDouble(0.0);
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707 }
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708 if (Py_IS_INFINITY(iv)) {
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709 /* (+-inf)**w is: inf for w positive, 0 for w negative; in
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710 * both cases, we need to add the appropriate sign if w is
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711 * an odd integer.
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712 */
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713 int iw_is_odd = DOUBLE_IS_ODD_INTEGER(iw);
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714 if (iw > 0.0)
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715 return PyFloat_FromDouble(iw_is_odd ? iv : fabs(iv));
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716 else
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717 return PyFloat_FromDouble(iw_is_odd ?
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718 copysign(0.0, iv) : 0.0);
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719 }
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720 if (iv == 0.0) { /* 0**w is: 0 for w positive, 1 for w zero
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721 (already dealt with above), and an error
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722 if w is negative. */
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723 int iw_is_odd = DOUBLE_IS_ODD_INTEGER(iw);
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724 if (iw < 0.0) {
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725 PyErr_SetString(PyExc_ZeroDivisionError,
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726 "0.0 cannot be raised to a "
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727 "negative power");
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728 return NULL;
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729 }
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730 /* use correct sign if iw is odd */
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731 return PyFloat_FromDouble(iw_is_odd ? iv : 0.0);
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732 }
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733
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734 if (iv < 0.0) {
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735 /* Whether this is an error is a mess, and bumps into libm
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736 * bugs so we have to figure it out ourselves.
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737 */
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738 if (iw != floor(iw)) {
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739 /* Negative numbers raised to fractional powers
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740 * become complex.
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741 */
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742 return PyComplex_Type.tp_as_number->nb_power(v, w, z);
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743 }
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744 /* iw is an exact integer, albeit perhaps a very large
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745 * one. Replace iv by its absolute value and remember
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746 * to negate the pow result if iw is odd.
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747 */
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748 iv = -iv;
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749 negate_result = DOUBLE_IS_ODD_INTEGER(iw);
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750 }
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751
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752 if (iv == 1.0) { /* 1**w is 1, even 1**inf and 1**nan */
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753 /* (-1) ** large_integer also ends up here. Here's an
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754 * extract from the comments for the previous
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755 * implementation explaining why this special case is
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756 * necessary:
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757 *
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758 * -1 raised to an exact integer should never be exceptional.
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759 * Alas, some libms (chiefly glibc as of early 2003) return
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760 * NaN and set EDOM on pow(-1, large_int) if the int doesn't
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761 * happen to be representable in a *C* integer. That's a
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762 * bug.
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763 */
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764 return PyFloat_FromDouble(negate_result ? -1.0 : 1.0);
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765 }
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766
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767 /* Now iv and iw are finite, iw is nonzero, and iv is
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768 * positive and not equal to 1.0. We finally allow
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769 * the platform pow to step in and do the rest.
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770 */
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771 errno = 0;
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772 PyFPE_START_PROTECT("pow", return NULL)
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773 ix = pow(iv, iw);
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774 PyFPE_END_PROTECT(ix)
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775 Py_ADJUST_ERANGE1(ix);
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776 if (negate_result)
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777 ix = -ix;
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778
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779 if (errno != 0) {
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780 /* We don't expect any errno value other than ERANGE, but
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781 * the range of libm bugs appears unbounded.
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782 */
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783 PyErr_SetFromErrno(errno == ERANGE ? PyExc_OverflowError :
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784 PyExc_ValueError);
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785 return NULL;
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786 }
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787 return PyFloat_FromDouble(ix);
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788 }
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789
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790 #undef DOUBLE_IS_ODD_INTEGER
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791
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792 static PyObject *
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793 float_neg(PyFloatObject *v)
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794 {
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795 return PyFloat_FromDouble(-v->ob_fval);
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796 }
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797
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parents: 5197
diff changeset
798 static PyObject *
13454
fcc75a3748f5 ANSI-fication of the sources.
Fred Drake <fdrake@acm.org>
parents: 13447
diff changeset
799 float_abs(PyFloatObject *v)
227
7ec6058b539b Added (dummy) divmod and (functional) abs.
Guido van Rossum <guido@python.org>
parents: 145
diff changeset
800 {
61467
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diff changeset
801 return PyFloat_FromDouble(fabs(v->ob_fval));
6
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
802 }
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
803
239
fda973f2a512 Added nonzero test
Guido van Rossum <guido@python.org>
parents: 227
diff changeset
804 static int
40401
88133417dfd0 - patch #1600346 submitted by Tomer Filiba
Jack Diederich <jackdied@gmail.com>
parents: 39603
diff changeset
805 float_bool(PyFloatObject *v)
239
fda973f2a512 Added nonzero test
Guido van Rossum <guido@python.org>
parents: 227
diff changeset
806 {
61467
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diff changeset
807 return v->ob_fval != 0.0;
239
fda973f2a512 Added nonzero test
Guido van Rossum <guido@python.org>
parents: 227
diff changeset
808 }
fda973f2a512 Added nonzero test
Guido van Rossum <guido@python.org>
parents: 227
diff changeset
809
5396
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diff changeset
810 static PyObject *
46477
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diff changeset
811 float_is_integer(PyObject *v)
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diff changeset
812 {
61467
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diff changeset
813 double x = PyFloat_AsDouble(v);
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diff changeset
814 PyObject *o;
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815
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816 if (x == -1.0 && PyErr_Occurred())
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diff changeset
817 return NULL;
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818 if (!Py_IS_FINITE(x))
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819 Py_RETURN_FALSE;
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820 errno = 0;
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821 PyFPE_START_PROTECT("is_integer", return NULL)
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822 o = (floor(x) == x) ? Py_True : Py_False;
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823 PyFPE_END_PROTECT(x)
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diff changeset
824 if (errno != 0) {
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825 PyErr_SetFromErrno(errno == ERANGE ? PyExc_OverflowError :
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826 PyExc_ValueError);
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827 return NULL;
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diff changeset
828 }
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diff changeset
829 Py_INCREF(o);
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830 return o;
46477
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831 }
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diff changeset
832
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diff changeset
833 #if 0
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834 static PyObject *
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835 float_is_inf(PyObject *v)
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diff changeset
836 {
61467
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837 double x = PyFloat_AsDouble(v);
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838 if (x == -1.0 && PyErr_Occurred())
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839 return NULL;
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840 return PyBool_FromLong((long)Py_IS_INFINITY(x));
46477
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841 }
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diff changeset
842
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diff changeset
843 static PyObject *
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844 float_is_nan(PyObject *v)
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diff changeset
845 {
61467
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846 double x = PyFloat_AsDouble(v);
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diff changeset
847 if (x == -1.0 && PyErr_Occurred())
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diff changeset
848 return NULL;
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diff changeset
849 return PyBool_FromLong((long)Py_IS_NAN(x));
46477
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850 }
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diff changeset
851
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diff changeset
852 static PyObject *
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853 float_is_finite(PyObject *v)
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854 {
61467
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855 double x = PyFloat_AsDouble(v);
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856 if (x == -1.0 && PyErr_Occurred())
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857 return NULL;
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858 return PyBool_FromLong((long)Py_IS_FINITE(x));
46477
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859 }
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860 #endif
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861
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diff changeset
862 static PyObject *
42753
077fe7860cc9 Finish the work on __round__ and __trunc__.
Guido van Rossum <guido@python.org>
parents: 42559
diff changeset
863 float_trunc(PyObject *v)
1049
2ed511171809 Made builtins int(), long(), float(), oct() and hex() more generic.
Guido van Rossum <guido@python.org>
parents: 955
diff changeset
864 {
61467
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diff changeset
865 double x = PyFloat_AsDouble(v);
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diff changeset
866 double wholepart; /* integral portion of x, rounded toward 0 */
18838
a8575f358b9f SF bug #444510: int() should guarantee truncation.
Tim Peters <tim.peters@gmail.com>
parents: 17707
diff changeset
867
61467
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diff changeset
868 (void)modf(x, &wholepart);
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diff changeset
869 /* Try to get out cheap if this fits in a Python int. The attempt
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diff changeset
870 * to cast to long must be protected, as C doesn't define what
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diff changeset
871 * happens if the double is too big to fit in a long. Some rare
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diff changeset
872 * systems raise an exception then (RISCOS was mentioned as one,
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diff changeset
873 * and someone using a non-default option on Sun also bumped into
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diff changeset
874 * that). Note that checking for >= and <= LONG_{MIN,MAX} would
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diff changeset
875 * still be vulnerable: if a long has more bits of precision than
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diff changeset
876 * a double, casting MIN/MAX to double may yield an approximation,
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diff changeset
877 * and if that's rounded up, then, e.g., wholepart=LONG_MAX+1 would
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diff changeset
878 * yield true from the C expression wholepart<=LONG_MAX, despite
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diff changeset
879 * that wholepart is actually greater than LONG_MAX.
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diff changeset
880 */
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881 if (LONG_MIN < wholepart && wholepart < LONG_MAX) {
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diff changeset
882 const long aslong = (long)wholepart;
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diff changeset
883 return PyLong_FromLong(aslong);
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diff changeset
884 }
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diff changeset
885 return PyLong_FromDouble(wholepart);
1049
2ed511171809 Made builtins int(), long(), float(), oct() and hex() more generic.
Guido van Rossum <guido@python.org>
parents: 955
diff changeset
886 }
2ed511171809 Made builtins int(), long(), float(), oct() and hex() more generic.
Guido van Rossum <guido@python.org>
parents: 955
diff changeset
887
53218
d43d64252d36 Issue #1869 (and 4707, 5118, 5473, 1456775): use the new
Mark Dickinson <dickinsm@gmail.com>
parents: 53187
diff changeset
888 /* double_round: rounds a finite double to the closest multiple of
d43d64252d36 Issue #1869 (and 4707, 5118, 5473, 1456775): use the new
Mark Dickinson <dickinsm@gmail.com>
parents: 53187
diff changeset
889 10**-ndigits; here ndigits is within reasonable bounds (typically, -308 <=
d43d64252d36 Issue #1869 (and 4707, 5118, 5473, 1456775): use the new
Mark Dickinson <dickinsm@gmail.com>
parents: 53187
diff changeset
890 ndigits <= 323). Returns a Python float, or sets a Python error and
d43d64252d36 Issue #1869 (and 4707, 5118, 5473, 1456775): use the new
Mark Dickinson <dickinsm@gmail.com>
parents: 53187
diff changeset
891 returns NULL on failure (OverflowError and memory errors are possible). */
d43d64252d36 Issue #1869 (and 4707, 5118, 5473, 1456775): use the new
Mark Dickinson <dickinsm@gmail.com>
parents: 53187
diff changeset
892
d43d64252d36 Issue #1869 (and 4707, 5118, 5473, 1456775): use the new
Mark Dickinson <dickinsm@gmail.com>
parents: 53187
diff changeset
893 #ifndef PY_NO_SHORT_FLOAT_REPR
d43d64252d36 Issue #1869 (and 4707, 5118, 5473, 1456775): use the new
Mark Dickinson <dickinsm@gmail.com>
parents: 53187
diff changeset
894 /* version of double_round that uses the correctly-rounded string<->double
d43d64252d36 Issue #1869 (and 4707, 5118, 5473, 1456775): use the new
Mark Dickinson <dickinsm@gmail.com>
parents: 53187
diff changeset
895 conversions from Python/dtoa.c */
d43d64252d36 Issue #1869 (and 4707, 5118, 5473, 1456775): use the new
Mark Dickinson <dickinsm@gmail.com>
parents: 53187
diff changeset
896
d43d64252d36 Issue #1869 (and 4707, 5118, 5473, 1456775): use the new
Mark Dickinson <dickinsm@gmail.com>
parents: 53187
diff changeset
897 static PyObject *
d43d64252d36 Issue #1869 (and 4707, 5118, 5473, 1456775): use the new
Mark Dickinson <dickinsm@gmail.com>
parents: 53187
diff changeset
898 double_round(double x, int ndigits) {
d43d64252d36 Issue #1869 (and 4707, 5118, 5473, 1456775): use the new
Mark Dickinson <dickinsm@gmail.com>
parents: 53187
diff changeset
899
61467
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diff changeset
900 double rounded;
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901 Py_ssize_t buflen, mybuflen=100;
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902 char *buf, *buf_end, shortbuf[100], *mybuf=shortbuf;
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903 int decpt, sign;
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904 PyObject *result = NULL;
53218
d43d64252d36 Issue #1869 (and 4707, 5118, 5473, 1456775): use the new
Mark Dickinson <dickinsm@gmail.com>
parents: 53187
diff changeset
905
61467
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diff changeset
906 /* round to a decimal string */
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907 buf = _Py_dg_dtoa(x, 3, ndigits, &decpt, &sign, &buf_end);
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908 if (buf == NULL) {
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909 PyErr_NoMemory();
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910 return NULL;
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911 }
53218
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Mark Dickinson <dickinsm@gmail.com>
parents: 53187
diff changeset
912
61467
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913 /* Get new buffer if shortbuf is too small. Space needed <= buf_end -
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914 buf + 8: (1 extra for '0', 1 for sign, 5 for exp, 1 for '\0'). */
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915 buflen = buf_end - buf;
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916 if (buflen + 8 > mybuflen) {
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917 mybuflen = buflen+8;
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918 mybuf = (char *)PyMem_Malloc(mybuflen);
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diff changeset
919 if (mybuf == NULL) {
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920 PyErr_NoMemory();
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921 goto exit;
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922 }
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923 }
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924 /* copy buf to mybuf, adding exponent, sign and leading 0 */
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925 PyOS_snprintf(mybuf, mybuflen, "%s0%se%d", (sign ? "-" : ""),
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926 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
927
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diff changeset
928 /* and convert the resulting string back to a double */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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diff changeset
929 errno = 0;
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diff changeset
930 rounded = _Py_dg_strtod(mybuf, NULL);
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diff changeset
931 if (errno == ERANGE && fabs(rounded) >= 1.)
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diff changeset
932 PyErr_SetString(PyExc_OverflowError,
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diff changeset
933 "rounded value too large to represent");
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diff changeset
934 else
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diff changeset
935 result = PyFloat_FromDouble(rounded);
53218
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936
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diff changeset
937 /* done computing value; now clean up */
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diff changeset
938 if (mybuf != shortbuf)
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diff changeset
939 PyMem_Free(mybuf);
53218
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diff changeset
940 exit:
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941 _Py_dg_freedtoa(buf);
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diff changeset
942 return result;
53218
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diff changeset
943 }
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944
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diff changeset
945 #else /* PY_NO_SHORT_FLOAT_REPR */
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946
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diff changeset
947 /* fallback version, to be used when correctly rounded binary<->decimal
d43d64252d36 Issue #1869 (and 4707, 5118, 5473, 1456775): use the new
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parents: 53187
diff changeset
948 conversions aren't available */
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diff changeset
949
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950 static PyObject *
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951 double_round(double x, int ndigits) {
61467
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952 double pow1, pow2, y, z;
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953 if (ndigits >= 0) {
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954 if (ndigits > 22) {
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955 /* pow1 and pow2 are each safe from overflow, but
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956 pow1*pow2 ~= pow(10.0, ndigits) might overflow */
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957 pow1 = pow(10.0, (double)(ndigits-22));
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958 pow2 = 1e22;
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959 }
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960 else {
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961 pow1 = pow(10.0, (double)ndigits);
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962 pow2 = 1.0;
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963 }
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964 y = (x*pow1)*pow2;
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965 /* if y overflows, then rounded value is exactly x */
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966 if (!Py_IS_FINITE(y))
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967 return PyFloat_FromDouble(x);
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968 }
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969 else {
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970 pow1 = pow(10.0, (double)-ndigits);
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971 pow2 = 1.0; /* unused; silences a gcc compiler warning */
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972 y = x / pow1;
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973 }
53218
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974
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975 z = round(y);
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976 if (fabs(y-z) == 0.5)
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977 /* halfway between two integers; use round-half-even */
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978 z = 2.0*round(y/2.0);
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979
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980 if (ndigits >= 0)
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981 z = (z / pow2) / pow1;
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982 else
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983 z *= pow1;
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984
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985 /* if computation resulted in overflow, raise OverflowError */
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986 if (!Py_IS_FINITE(z)) {
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987 PyErr_SetString(PyExc_OverflowError,
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988 "overflow occurred during round");
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989 return NULL;
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990 }
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991
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992 return PyFloat_FromDouble(z);
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993 }
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994
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995 #endif /* PY_NO_SHORT_FLOAT_REPR */
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996
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997 /* round a Python float v to the closest multiple of 10**-ndigits */
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998
5396
d1447950fa04 Quickly renamed the last directory.
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999 static PyObject *
42753
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1000 float_round(PyObject *v, PyObject *args)
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1001 {
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1002 double x, rounded;
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1003 PyObject *o_ndigits = NULL;
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1004 Py_ssize_t ndigits;
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1005
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1006 x = PyFloat_AsDouble(v);
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1007 if (!PyArg_ParseTuple(args, "|O", &o_ndigits))
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1008 return NULL;
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1009 if (o_ndigits == NULL) {
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diff changeset
1010 /* single-argument round: round to nearest integer */
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1011 rounded = round(x);
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1012 if (fabs(x-rounded) == 0.5)
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1013 /* halfway case: round to even */
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1014 rounded = 2.0*round(x/2.0);
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1015 return PyLong_FromDouble(rounded);
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1016 }
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1017
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1018 /* interpret second argument as a Py_ssize_t; clips on overflow */
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1019 ndigits = PyNumber_AsSsize_t(o_ndigits, NULL);
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1020 if (ndigits == -1 && PyErr_Occurred())
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1021 return NULL;
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1022
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1023 /* nans and infinities round to themselves */
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1024 if (!Py_IS_FINITE(x))
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1025 return PyFloat_FromDouble(x);
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1026
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1027 /* Deal with extreme values for ndigits. For ndigits > NDIGITS_MAX, x
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1028 always rounds to itself. For ndigits < NDIGITS_MIN, x always
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diff changeset
1029 rounds to +-0.0. Here 0.30103 is an upper bound for log10(2). */
53218
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parents: 53187
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1030 #define NDIGITS_MAX ((int)((DBL_MANT_DIG-DBL_MIN_EXP) * 0.30103))
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1031 #define NDIGITS_MIN (-(int)((DBL_MAX_EXP + 1) * 0.30103))
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1032 if (ndigits > NDIGITS_MAX)
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diff changeset
1033 /* return x */
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1034 return PyFloat_FromDouble(x);
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1035 else if (ndigits < NDIGITS_MIN)
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1036 /* return 0.0, but with sign of x */
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1037 return PyFloat_FromDouble(0.0*x);
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1038 else
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1039 /* finite x, and ndigits is not unreasonably large */
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1040 return double_round(x, (int)ndigits);
53218
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1041 #undef NDIGITS_MAX
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1042 #undef NDIGITS_MIN
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1043 }
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1044
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1045 static PyObject *
13454
fcc75a3748f5 ANSI-fication of the sources.
Fred Drake <fdrake@acm.org>
parents: 13447
diff changeset
1046 float_float(PyObject *v)
1049
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parents: 955
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1047 {
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1048 if (PyFloat_CheckExact(v))
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1049 Py_INCREF(v);
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1050 else
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1051 v = PyFloat_FromDouble(((PyFloatObject *)v)->ob_fval);
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1052 return v;
1049
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1053 }
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1054
48497
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diff changeset
1055 /* turn ASCII hex characters into integer values and vice versa */
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diff changeset
1056
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diff changeset
1057 static char
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diff changeset
1058 char_from_hex(int x)
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1059 {
61467
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1060 assert(0 <= x && x < 16);
72918
d76338eacf7c Issue #13088: Add shared Py_hexdigits constant to format a number into base 16
Victor Stinner <victor.stinner@haypocalc.com>
parents: 72475
diff changeset
1061 return Py_hexdigits[x];
48497
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1062 }
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1063
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diff changeset
1064 static int
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1065 hex_from_char(char c) {
61467
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1066 int x;
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1067 switch(c) {
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1068 case '0':
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1069 x = 0;
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1070 break;
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1071 case '1':
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1072 x = 1;
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1073 break;
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1074 case '2':
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1075 x = 2;
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1076 break;
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1077 case '3':
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1078 x = 3;
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1079 break;
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1080 case '4':
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1081 x = 4;
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1082 break;
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1083 case '5':
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1084 x = 5;
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1085 break;
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1086 case '6':
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1087 x = 6;
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1088 break;
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1089 case '7':
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1090 x = 7;
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1091 break;
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1092 case '8':
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1093 x = 8;
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1094 break;
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1095 case '9':
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1096 x = 9;
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1097 break;
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1098 case 'a':
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1099 case 'A':
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1100 x = 10;
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1101 break;
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1102 case 'b':
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1103 case 'B':
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1104 x = 11;
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1105 break;
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1106 case 'c':
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1107 case 'C':
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1108 x = 12;
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1109 break;
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1110 case 'd':
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1111 case 'D':
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1112 x = 13;
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1113 break;
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1114 case 'e':
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1115 case 'E':
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1116 x = 14;
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1117 break;
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1118 case 'f':
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1119 case 'F':
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1120 x = 15;
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1121 break;
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1122 default:
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1123 x = -1;
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1124 break;
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1125 }
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1126 return x;
48497
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1127 }
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1128
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diff changeset
1129 /* convert a float to a hexadecimal string */
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diff changeset
1130
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1131 /* TOHEX_NBITS is DBL_MANT_DIG rounded up to the next integer
2bb866d282ba Merged revisions 64974 via svnmerge from
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diff changeset
1132 of the form 4k+1. */
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1133 #define TOHEX_NBITS DBL_MANT_DIG + 3 - (DBL_MANT_DIG+2)%4
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diff changeset
1134
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diff changeset
1135 static PyObject *
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diff changeset
1136 float_hex(PyObject *v)
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1137 {
61467
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1138 double x, m;
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1139 int e, shift, i, si, esign;
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diff changeset
1140 /* Space for 1+(TOHEX_NBITS-1)/4 digits, a decimal point, and the
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diff changeset
1141 trailing NUL byte. */
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1142 char s[(TOHEX_NBITS-1)/4+3];
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1143
61467
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1144 CONVERT_TO_DOUBLE(v, x);
48497
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1145
61467
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1146 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>
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diff changeset
1147 return float_repr((PyFloatObject *)v);
48497
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1148
61467
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1149 if (x == 0.0) {
62692
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diff changeset
1150 if (copysign(1.0, x) == -1.0)
61467
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1151 return PyUnicode_FromString("-0x0.0p+0");
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1152 else
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1153 return PyUnicode_FromString("0x0.0p+0");
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1154 }
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1155
61467
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1156 m = frexp(fabs(x), &e);
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1157 shift = 1 - MAX(DBL_MIN_EXP - e, 0);
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1158 m = ldexp(m, shift);
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1159 e -= shift;
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1160
61467
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1161 si = 0;
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1162 s[si] = char_from_hex((int)m);
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1163 si++;
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1164 m -= (int)m;
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1165 s[si] = '.';
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1166 si++;
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1167 for (i=0; i < (TOHEX_NBITS-1)/4; i++) {
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1168 m *= 16.0;
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1169 s[si] = char_from_hex((int)m);
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1170 si++;
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1171 m -= (int)m;
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1172 }
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1173 s[si] = '\0';
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1174
61467
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1175 if (e < 0) {
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1176 esign = (int)'-';
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1177 e = -e;
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1178 }
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1179 else
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1180 esign = (int)'+';
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1181
61467
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1182 if (x < 0.0)
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1183 return PyUnicode_FromFormat("-0x%sp%c%d", s, esign, e);
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1184 else
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1185 return PyUnicode_FromFormat("0x%sp%c%d", s, esign, e);
48497
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1186 }
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diff changeset
1187
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diff changeset
1188 PyDoc_STRVAR(float_hex_doc,
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1189 "float.hex() -> string\n\
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1190 \n\
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1191 Return a hexadecimal representation of a floating-point number.\n\
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diff changeset
1192 >>> (-0.1).hex()\n\
2bb866d282ba Merged revisions 64974 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
parents: 48364
diff changeset
1193 '-0x1.999999999999ap-4'\n\
2bb866d282ba Merged revisions 64974 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
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diff changeset
1194 >>> 3.14159.hex()\n\
2bb866d282ba Merged revisions 64974 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
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diff changeset
1195 '0x1.921f9f01b866ep+1'");
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diff changeset
1196
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diff changeset
1197 /* Convert a hexadecimal string to a float. */
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Mark Dickinson <dickinsm@gmail.com>
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diff changeset
1198
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diff changeset
1199 static PyObject *
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diff changeset
1200 float_fromhex(PyObject *cls, PyObject *arg)
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Mark Dickinson <dickinsm@gmail.com>
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diff changeset
1201 {
61467
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diff changeset
1202 PyObject *result_as_float, *result;
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parents: 54232
diff changeset
1203 double x;
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parents: 54232
diff changeset
1204 long exp, top_exp, lsb, key_digit;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1205 char *s, *coeff_start, *s_store, *coeff_end, *exp_start, *s_end;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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parents: 54232
diff changeset
1206 int half_eps, digit, round_up, negate=0;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1207 Py_ssize_t length, ndigits, fdigits, i;
48497
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diff changeset
1208
61467
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diff changeset
1209 /*
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diff changeset
1210 * For the sake of simplicity and correctness, we impose an artificial
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parents: 54232
diff changeset
1211 * limit on ndigits, the total number of hex digits in the coefficient
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diff changeset
1212 * The limit is chosen to ensure that, writing exp for the exponent,
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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diff changeset
1213 *
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parents: 54232
diff changeset
1214 * (1) if exp > LONG_MAX/2 then the value of the hex string is
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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diff changeset
1215 * guaranteed to overflow (provided it's nonzero)
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diff changeset
1216 *
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diff changeset
1217 * (2) if exp < LONG_MIN/2 then the value of the hex string is
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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diff changeset
1218 * guaranteed to underflow to 0.
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diff changeset
1219 *
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diff changeset
1220 * (3) if LONG_MIN/2 <= exp <= LONG_MAX/2 then there's no danger of
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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diff changeset
1221 * overflow in the calculation of exp and top_exp below.
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parents: 54232
diff changeset
1222 *
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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diff changeset
1223 * More specifically, ndigits is assumed to satisfy the following
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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diff changeset
1224 * inequalities:
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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diff changeset
1225 *
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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parents: 54232
diff changeset
1226 * 4*ndigits <= DBL_MIN_EXP - DBL_MANT_DIG - LONG_MIN/2
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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diff changeset
1227 * 4*ndigits <= LONG_MAX/2 + 1 - DBL_MAX_EXP
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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diff changeset
1228 *
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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diff changeset
1229 * If either of these inequalities is not satisfied, a ValueError is
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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diff changeset
1230 * raised. Otherwise, write x for the value of the hex string, and
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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diff changeset
1231 * assume x is nonzero. Then
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diff changeset
1232 *
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diff changeset
1233 * 2**(exp-4*ndigits) <= |x| < 2**(exp+4*ndigits).
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diff changeset
1234 *
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diff changeset
1235 * Now if exp > LONG_MAX/2 then:
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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diff changeset
1236 *
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diff changeset
1237 * exp - 4*ndigits >= LONG_MAX/2 + 1 - (LONG_MAX/2 + 1 - DBL_MAX_EXP)
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diff changeset
1238 * = DBL_MAX_EXP
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diff changeset
1239 *
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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diff changeset
1240 * so |x| >= 2**DBL_MAX_EXP, which is too large to be stored in C
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diff changeset
1241 * double, so overflows. If exp < LONG_MIN/2, then
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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diff changeset
1242 *
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diff changeset
1243 * exp + 4*ndigits <= LONG_MIN/2 - 1 + (
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diff changeset
1244 * DBL_MIN_EXP - DBL_MANT_DIG - LONG_MIN/2)
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diff changeset
1245 * = DBL_MIN_EXP - DBL_MANT_DIG - 1
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diff changeset
1246 *
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diff changeset
1247 * and so |x| < 2**(DBL_MIN_EXP-DBL_MANT_DIG-1), hence underflows to 0
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diff changeset
1248 * when converted to a C double.
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diff changeset
1249 *
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diff changeset
1250 * It's easy to show that if LONG_MIN/2 <= exp <= LONG_MAX/2 then both
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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diff changeset
1251 * exp+4*ndigits and exp-4*ndigits are within the range of a long.
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diff changeset
1252 */
48497
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diff changeset
1253
61467
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diff changeset
1254 s = _PyUnicode_AsStringAndSize(arg, &length);
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diff changeset
1255 if (s == NULL)
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diff changeset
1256 return NULL;
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diff changeset
1257 s_end = s + length;
48497
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diff changeset
1258
61467
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diff changeset
1259 /********************
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diff changeset
1260 * Parse the string *
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diff changeset
1261 ********************/
48497
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diff changeset
1262
61467
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diff changeset
1263 /* leading whitespace */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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diff changeset
1264 while (Py_ISSPACE(*s))
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diff changeset
1265 s++;
48497
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diff changeset
1266
61467
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diff changeset
1267 /* infinities and nans */
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diff changeset
1268 x = _Py_parse_inf_or_nan(s, &coeff_end);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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diff changeset
1269 if (coeff_end != s) {
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parents: 54232
diff changeset
1270 s = coeff_end;
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diff changeset
1271 goto finished;
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diff changeset
1272 }
54232
4501b638fc3f Refactor to remove duplicated nan/inf parsing code in
Mark Dickinson <dickinsm@gmail.com>
parents: 54001
diff changeset
1273
61467
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diff changeset
1274 /* optional sign */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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diff changeset
1275 if (*s == '-') {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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diff changeset
1276 s++;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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diff changeset
1277 negate = 1;
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diff changeset
1278 }
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diff changeset
1279 else if (*s == '+')
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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diff changeset
1280 s++;
48497
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diff changeset
1281
61467
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diff changeset
1282 /* [0x] */
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diff changeset
1283 s_store = s;
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diff changeset
1284 if (*s == '0') {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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diff changeset
1285 s++;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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diff changeset
1286 if (*s == 'x' || *s == 'X')
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diff changeset
1287 s++;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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diff changeset
1288 else
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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diff changeset
1289 s = s_store;
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diff changeset
1290 }
48497
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diff changeset
1291
61467
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diff changeset
1292 /* coefficient: <integer> [. <fraction>] */
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diff changeset
1293 coeff_start = s;
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diff changeset
1294 while (hex_from_char(*s) >= 0)
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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diff changeset
1295 s++;
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diff changeset
1296 s_store = s;
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diff changeset
1297 if (*s == '.') {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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diff changeset
1298 s++;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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diff changeset
1299 while (hex_from_char(*s) >= 0)
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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diff changeset
1300 s++;
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diff changeset
1301 coeff_end = s-1;
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diff changeset
1302 }
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diff changeset
1303 else
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diff changeset
1304 coeff_end = s;
48497
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diff changeset
1305
61467
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diff changeset
1306 /* ndigits = total # of hex digits; fdigits = # after point */
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diff changeset
1307 ndigits = coeff_end - coeff_start;
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diff changeset
1308 fdigits = coeff_end - s_store;
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diff changeset
1309 if (ndigits == 0)
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diff changeset
1310 goto parse_error;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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diff changeset
1311 if (ndigits > MIN(DBL_MIN_EXP - DBL_MANT_DIG - LONG_MIN/2,
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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diff changeset
1312 LONG_MAX/2 + 1 - DBL_MAX_EXP)/4)
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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diff changeset
1313 goto insane_length_error;
48497
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diff changeset
1314
61467
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diff changeset
1315 /* [p <exponent>] */
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diff changeset
1316 if (*s == 'p' || *s == 'P') {
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parents: 54232
diff changeset
1317 s++;
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parents: 54232
diff changeset
1318 exp_start = s;
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diff changeset
1319 if (*s == '-' || *s == '+')
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diff changeset
1320 s++;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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diff changeset
1321 if (!('0' <= *s && *s <= '9'))
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diff changeset
1322 goto parse_error;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1323 s++;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1324 while ('0' <= *s && *s <= '9')
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1325 s++;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1326 exp = strtol(exp_start, NULL, 10);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1327 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1328 else
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1329 exp = 0;
48497
2bb866d282ba Merged revisions 64974 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
parents: 48364
diff changeset
1330
2bb866d282ba Merged revisions 64974 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
parents: 48364
diff changeset
1331 /* for 0 <= j < ndigits, HEX_DIGIT(j) gives the jth most significant digit */
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1332 #define HEX_DIGIT(j) hex_from_char(*((j) < fdigits ? \
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1333 coeff_end-(j) : \
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1334 coeff_end-1-(j)))
48497
2bb866d282ba Merged revisions 64974 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
parents: 48364
diff changeset
1335
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1336 /*******************************************
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1337 * Compute rounded value of the hex string *
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1338 *******************************************/
48497
2bb866d282ba Merged revisions 64974 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
parents: 48364
diff changeset
1339
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1340 /* Discard leading zeros, and catch extreme overflow and underflow */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1341 while (ndigits > 0 && HEX_DIGIT(ndigits-1) == 0)
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1342 ndigits--;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1343 if (ndigits == 0 || exp < LONG_MIN/2) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1344 x = 0.0;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1345 goto finished;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1346 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1347 if (exp > LONG_MAX/2)
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1348 goto overflow_error;
48497
2bb866d282ba Merged revisions 64974 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
parents: 48364
diff changeset
1349
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1350 /* Adjust exponent for fractional part. */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1351 exp = exp - 4*((long)fdigits);
48497
2bb866d282ba Merged revisions 64974 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
parents: 48364
diff changeset
1352
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1353 /* top_exp = 1 more than exponent of most sig. bit of coefficient */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1354 top_exp = exp + 4*((long)ndigits - 1);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1355 for (digit = HEX_DIGIT(ndigits-1); digit != 0; digit /= 2)
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1356 top_exp++;
48497
2bb866d282ba Merged revisions 64974 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
parents: 48364
diff changeset
1357
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1358 /* catch almost all nonextreme cases of overflow and underflow here */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1359 if (top_exp < DBL_MIN_EXP - DBL_MANT_DIG) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1360 x = 0.0;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1361 goto finished;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1362 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1363 if (top_exp > DBL_MAX_EXP)
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1364 goto overflow_error;
48497
2bb866d282ba Merged revisions 64974 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
parents: 48364
diff changeset
1365
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1366 /* lsb = exponent of least significant bit of the *rounded* value.
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1367 This is top_exp - DBL_MANT_DIG unless result is subnormal. */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1368 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
1369
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1370 x = 0.0;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1371 if (exp >= lsb) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1372 /* no rounding required */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1373 for (i = ndigits-1; i >= 0; i--)
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1374 x = 16.0*x + HEX_DIGIT(i);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1375 x = ldexp(x, (int)(exp));
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1376 goto finished;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1377 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1378 /* rounding required. key_digit is the index of the hex digit
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1379 containing the first bit to be rounded away. */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1380 half_eps = 1 << (int)((lsb - exp - 1) % 4);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1381 key_digit = (lsb - exp - 1) / 4;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1382 for (i = ndigits-1; i > key_digit; i--)
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1383 x = 16.0*x + HEX_DIGIT(i);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1384 digit = HEX_DIGIT(key_digit);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1385 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
1386
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1387 /* round-half-even: round up if bit lsb-1 is 1 and at least one of
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1388 bits lsb, lsb-2, lsb-3, lsb-4, ... is 1. */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1389 if ((digit & half_eps) != 0) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1390 round_up = 0;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1391 if ((digit & (3*half_eps-1)) != 0 ||
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1392 (half_eps == 8 && (HEX_DIGIT(key_digit+1) & 1) != 0))
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1393 round_up = 1;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1394 else
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1395 for (i = key_digit-1; i >= 0; i--)
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1396 if (HEX_DIGIT(i) != 0) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1397 round_up = 1;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1398 break;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1399 }
62834
202f31d40389 Style nit.
Mark Dickinson <dickinsm@gmail.com>
parents: 62690
diff changeset
1400 if (round_up) {
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1401 x += 2*half_eps;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1402 if (top_exp == DBL_MAX_EXP &&
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1403 x == ldexp((double)(2*half_eps), DBL_MANT_DIG))
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1404 /* overflow corner case: pre-rounded value <
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1405 2**DBL_MAX_EXP; rounded=2**DBL_MAX_EXP. */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1406 goto overflow_error;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1407 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1408 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1409 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
1410
2bb866d282ba Merged revisions 64974 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
parents: 48364
diff changeset
1411 finished:
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1412 /* optional trailing whitespace leading to the end of the string */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1413 while (Py_ISSPACE(*s))
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1414 s++;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1415 if (s != s_end)
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1416 goto parse_error;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1417 result_as_float = Py_BuildValue("(d)", negate ? -x : x);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1418 if (result_as_float == NULL)
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1419 return NULL;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1420 result = PyObject_CallObject(cls, result_as_float);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1421 Py_DECREF(result_as_float);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1422 return result;
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 overflow_error:
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1425 PyErr_SetString(PyExc_OverflowError,
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1426 "hexadecimal value too large to represent as a float");
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1427 return NULL;
48497
2bb866d282ba Merged revisions 64974 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
parents: 48364
diff changeset
1428
2bb866d282ba Merged revisions 64974 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
parents: 48364
diff changeset
1429 parse_error:
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1430 PyErr_SetString(PyExc_ValueError,
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1431 "invalid hexadecimal floating-point string");
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1432 return NULL;
48497
2bb866d282ba Merged revisions 64974 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
parents: 48364
diff changeset
1433
2bb866d282ba Merged revisions 64974 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
parents: 48364
diff changeset
1434 insane_length_error:
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1435 PyErr_SetString(PyExc_ValueError,
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1436 "hexadecimal string too long to convert");
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1437 return NULL;
48497
2bb866d282ba Merged revisions 64974 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
parents: 48364
diff changeset
1438 }
2bb866d282ba Merged revisions 64974 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
parents: 48364
diff changeset
1439
2bb866d282ba Merged revisions 64974 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
parents: 48364
diff changeset
1440 PyDoc_STRVAR(float_fromhex_doc,
2bb866d282ba Merged revisions 64974 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
parents: 48364
diff changeset
1441 "float.fromhex(string) -> float\n\
2bb866d282ba Merged revisions 64974 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
parents: 48364
diff changeset
1442 \n\
2bb866d282ba Merged revisions 64974 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
parents: 48364
diff changeset
1443 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
1444 >>> float.fromhex('0x1.ffffp10')\n\
2bb866d282ba Merged revisions 64974 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
parents: 48364
diff changeset
1445 2047.984375\n\
2bb866d282ba Merged revisions 64974 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
parents: 48364
diff changeset
1446 >>> float.fromhex('-0x1p-1074')\n\
2bb866d282ba Merged revisions 64974 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
parents: 48364
diff changeset
1447 -4.9406564584124654e-324");
2bb866d282ba Merged revisions 64974 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
parents: 48364
diff changeset
1448
2bb866d282ba Merged revisions 64974 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
parents: 48364
diff changeset
1449
45026
ebfbaa1051e2 Merged revisions 60364-60378 via svnmerge from
Christian Heimes <christian@cheimes.de>
parents: 44943
diff changeset
1450 static PyObject *
45134
bdcf40d1b38e Merged revisions 60481,60485,60489-60520,60523-60527,60530-60533,60535-60538,60540-60551 via svnmerge from
Christian Heimes <christian@cheimes.de>
parents: 45071
diff changeset
1451 float_as_integer_ratio(PyObject *v, PyObject *unused)
45026
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diff changeset
1452 {
61467
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diff changeset
1453 double self;
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parents: 54232
diff changeset
1454 double float_part;
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parents: 54232
diff changeset
1455 int exponent;
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parents: 54232
diff changeset
1456 int i;
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diff changeset
1457
61467
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diff changeset
1458 PyObject *prev;
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parents: 54232
diff changeset
1459 PyObject *py_exponent = NULL;
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parents: 54232
diff changeset
1460 PyObject *numerator = NULL;
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parents: 54232
diff changeset
1461 PyObject *denominator = NULL;
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parents: 54232
diff changeset
1462 PyObject *result_pair = NULL;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1463 PyNumberMethods *long_methods = PyLong_Type.tp_as_number;
45026
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Christian Heimes <christian@cheimes.de>
parents: 44943
diff changeset
1464
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Christian Heimes <christian@cheimes.de>
parents: 44943
diff changeset
1465 #define INPLACE_UPDATE(obj, call) \
61467
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1466 prev = obj; \
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parents: 54232
diff changeset
1467 obj = call; \
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parents: 54232
diff changeset
1468 Py_DECREF(prev); \
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Christian Heimes <christian@cheimes.de>
parents: 44943
diff changeset
1469
61467
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diff changeset
1470 CONVERT_TO_DOUBLE(v, self);
45026
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Christian Heimes <christian@cheimes.de>
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diff changeset
1471
61467
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diff changeset
1472 if (Py_IS_INFINITY(self)) {
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parents: 54232
diff changeset
1473 PyErr_SetString(PyExc_OverflowError,
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parents: 54232
diff changeset
1474 "Cannot pass infinity to float.as_integer_ratio.");
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parents: 54232
diff changeset
1475 return NULL;
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parents: 54232
diff changeset
1476 }
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diff changeset
1477 if (Py_IS_NAN(self)) {
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parents: 54232
diff changeset
1478 PyErr_SetString(PyExc_ValueError,
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diff changeset
1479 "Cannot pass NaN to float.as_integer_ratio.");
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parents: 54232
diff changeset
1480 return NULL;
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diff changeset
1481 }
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Christian Heimes <christian@cheimes.de>
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diff changeset
1482
61467
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diff changeset
1483 PyFPE_START_PROTECT("as_integer_ratio", goto error);
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diff changeset
1484 float_part = frexp(self, &exponent); /* self == float_part * 2**exponent exactly */
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parents: 54232
diff changeset
1485 PyFPE_END_PROTECT(float_part);
45026
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Christian Heimes <christian@cheimes.de>
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diff changeset
1486
61467
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diff changeset
1487 for (i=0; i<300 && float_part != floor(float_part) ; i++) {
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parents: 54232
diff changeset
1488 float_part *= 2.0;
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parents: 54232
diff changeset
1489 exponent--;
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diff changeset
1490 }
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diff changeset
1491 /* self == float_part * 2**exponent exactly and float_part is integral.
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parents: 54232
diff changeset
1492 If FLT_RADIX != 2, the 300 steps may leave a tiny fractional part
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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parents: 54232
diff changeset
1493 to be truncated by PyLong_FromDouble(). */
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diff changeset
1494
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diff changeset
1495 numerator = PyLong_FromDouble(float_part);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1496 if (numerator == NULL) goto error;
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Christian Heimes <christian@cheimes.de>
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diff changeset
1497
61467
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diff changeset
1498 /* fold in 2**exponent */
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parents: 54232
diff changeset
1499 denominator = PyLong_FromLong(1);
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diff changeset
1500 py_exponent = PyLong_FromLong(labs((long)exponent));
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diff changeset
1501 if (py_exponent == NULL) goto error;
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parents: 54232
diff changeset
1502 INPLACE_UPDATE(py_exponent,
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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diff changeset
1503 long_methods->nb_lshift(denominator, py_exponent));
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parents: 54232
diff changeset
1504 if (py_exponent == NULL) goto error;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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parents: 54232
diff changeset
1505 if (exponent > 0) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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parents: 54232
diff changeset
1506 INPLACE_UPDATE(numerator,
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parents: 54232
diff changeset
1507 long_methods->nb_multiply(numerator, py_exponent));
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parents: 54232
diff changeset
1508 if (numerator == NULL) goto error;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1509 }
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diff changeset
1510 else {
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parents: 54232
diff changeset
1511 Py_DECREF(denominator);
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parents: 54232
diff changeset
1512 denominator = py_exponent;
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parents: 54232
diff changeset
1513 py_exponent = NULL;
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parents: 54232
diff changeset
1514 }
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diff changeset
1515
61467
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diff changeset
1516 result_pair = PyTuple_Pack(2, numerator, denominator);
45026
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Christian Heimes <christian@cheimes.de>
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diff changeset
1517
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Christian Heimes <christian@cheimes.de>
parents: 44943
diff changeset
1518 #undef INPLACE_UPDATE
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Christian Heimes <christian@cheimes.de>
parents: 44943
diff changeset
1519 error:
61467
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diff changeset
1520 Py_XDECREF(py_exponent);
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diff changeset
1521 Py_XDECREF(denominator);
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diff changeset
1522 Py_XDECREF(numerator);
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diff changeset
1523 return result_pair;
45026
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Christian Heimes <christian@cheimes.de>
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diff changeset
1524 }
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Christian Heimes <christian@cheimes.de>
parents: 44943
diff changeset
1525
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Christian Heimes <christian@cheimes.de>
parents: 44943
diff changeset
1526 PyDoc_STRVAR(float_as_integer_ratio_doc,
ebfbaa1051e2 Merged revisions 60364-60378 via svnmerge from
Christian Heimes <christian@cheimes.de>
parents: 44943
diff changeset
1527 "float.as_integer_ratio() -> (int, int)\n"
ebfbaa1051e2 Merged revisions 60364-60378 via svnmerge from
Christian Heimes <christian@cheimes.de>
parents: 44943
diff changeset
1528 "\n"
45134
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parents: 45071
diff changeset
1529 "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
1530 "float and with a positive denominator.\n"
49493
bdf4da5d04ad merge from trunk
Benjamin Peterson <benjamin@python.org>
parents: 49270
diff changeset
1531 "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
1532 "\n"
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parents: 44943
diff changeset
1533 ">>> (10.0).as_integer_ratio()\n"
45134
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parents: 45071
diff changeset
1534 "(10, 1)\n"
45026
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diff changeset
1535 ">>> (0.0).as_integer_ratio()\n"
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Christian Heimes <christian@cheimes.de>
parents: 44943
diff changeset
1536 "(0, 1)\n"
ebfbaa1051e2 Merged revisions 60364-60378 via svnmerge from
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parents: 44943
diff changeset
1537 ">>> (-.25).as_integer_ratio()\n"
45134
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parents: 45071
diff changeset
1538 "(-1, 4)");
45026
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Christian Heimes <christian@cheimes.de>
parents: 44943
diff changeset
1539
1049
2ed511171809 Made builtins int(), long(), float(), oct() and hex() more generic.
Guido van Rossum <guido@python.org>
parents: 955
diff changeset
1540
24280
1598a1e473e2 staticforward bites the dust.
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 23832
diff changeset
1541 static PyObject *
19552
6c30d20d27f2 Make int, long and float subclassable.
Guido van Rossum <guido@python.org>
parents: 19457
diff changeset
1542 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
1543
18933
09df3254b49d Merge of descr-branch back into trunk.
Tim Peters <tim.peters@gmail.com>
parents: 18838
diff changeset
1544 static PyObject *
09df3254b49d Merge of descr-branch back into trunk.
Tim Peters <tim.peters@gmail.com>
parents: 18838
diff changeset
1545 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
1546 {
61467
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parents: 54232
diff changeset
1547 PyObject *x = Py_False; /* Integer zero */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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parents: 54232
diff changeset
1548 static char *kwlist[] = {"x", 0};
18933
09df3254b49d Merge of descr-branch back into trunk.
Tim Peters <tim.peters@gmail.com>
parents: 18838
diff changeset
1549
61467
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parents: 54232
diff changeset
1550 if (type != &PyFloat_Type)
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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parents: 54232
diff changeset
1551 return float_subtype_new(type, args, kwds); /* Wimp out */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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parents: 54232
diff changeset
1552 if (!PyArg_ParseTupleAndKeywords(args, kwds, "|O:float", kwlist, &x))
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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parents: 54232
diff changeset
1553 return NULL;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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parents: 54232
diff changeset
1554 /* If it's a string, but not a string subclass, use
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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parents: 54232
diff changeset
1555 PyFloat_FromString. */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1556 if (PyUnicode_CheckExact(x))
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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parents: 54232
diff changeset
1557 return PyFloat_FromString(x);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1558 return PyNumber_Float(x);
18933
09df3254b49d Merge of descr-branch back into trunk.
Tim Peters <tim.peters@gmail.com>
parents: 18838
diff changeset
1559 }
09df3254b49d Merge of descr-branch back into trunk.
Tim Peters <tim.peters@gmail.com>
parents: 18838
diff changeset
1560
19552
6c30d20d27f2 Make int, long and float subclassable.
Guido van Rossum <guido@python.org>
parents: 19457
diff changeset
1561 /* 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
1562 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
1563 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
1564 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
1565 */
6c30d20d27f2 Make int, long and float subclassable.
Guido van Rossum <guido@python.org>
parents: 19457
diff changeset
1566 static PyObject *
6c30d20d27f2 Make int, long and float subclassable.
Guido van Rossum <guido@python.org>
parents: 19457
diff changeset
1567 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
1568 {
61467
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diff changeset
1569 PyObject *tmp, *newobj;
19552
6c30d20d27f2 Make int, long and float subclassable.
Guido van Rossum <guido@python.org>
parents: 19457
diff changeset
1570
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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diff changeset
1571 assert(PyType_IsSubtype(type, &PyFloat_Type));
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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parents: 54232
diff changeset
1572 tmp = float_new(&PyFloat_Type, args, kwds);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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parents: 54232
diff changeset
1573 if (tmp == NULL)
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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parents: 54232
diff changeset
1574 return NULL;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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parents: 54232
diff changeset
1575 assert(PyFloat_CheckExact(tmp));
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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parents: 54232
diff changeset
1576 newobj = type->tp_alloc(type, 0);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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parents: 54232
diff changeset
1577 if (newobj == NULL) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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diff changeset
1578 Py_DECREF(tmp);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1579 return NULL;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1580 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1581 ((PyFloatObject *)newobj)->ob_fval = ((PyFloatObject *)tmp)->ob_fval;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1582 Py_DECREF(tmp);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1583 return newobj;
19552
6c30d20d27f2 Make int, long and float subclassable.
Guido van Rossum <guido@python.org>
parents: 19457
diff changeset
1584 }
6c30d20d27f2 Make int, long and float subclassable.
Guido van Rossum <guido@python.org>
parents: 19457
diff changeset
1585
27521
17bfd5dbc0f1 Implement appropriate __getnewargs__ for all immutable subclassable builtin
Guido van Rossum <guido@python.org>
parents: 27484
diff changeset
1586 static PyObject *
17bfd5dbc0f1 Implement appropriate __getnewargs__ for all immutable subclassable builtin
Guido van Rossum <guido@python.org>
parents: 27484
diff changeset
1587 float_getnewargs(PyFloatObject *v)
17bfd5dbc0f1 Implement appropriate __getnewargs__ for all immutable subclassable builtin
Guido van Rossum <guido@python.org>
parents: 27484
diff changeset
1588 {
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1589 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
1590 }
17bfd5dbc0f1 Implement appropriate __getnewargs__ for all immutable subclassable builtin
Guido van Rossum <guido@python.org>
parents: 27484
diff changeset
1591
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1592 /* 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
1593
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1594 typedef enum {
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1595 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
1596 } float_format_type;
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1597
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1598 static float_format_type double_format, float_format;
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1599 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
1600
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1601 static PyObject *
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1602 float_getformat(PyTypeObject *v, PyObject* arg)
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1603 {
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1604 char* s;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1605 float_format_type r;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1606
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1607 if (!PyUnicode_Check(arg)) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1608 PyErr_Format(PyExc_TypeError,
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1609 "__getformat__() argument must be string, not %.500s",
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1610 Py_TYPE(arg)->tp_name);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1611 return NULL;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1612 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1613 s = _PyUnicode_AsString(arg);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1614 if (s == NULL)
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1615 return NULL;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1616 if (strcmp(s, "double") == 0) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1617 r = double_format;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1618 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1619 else if (strcmp(s, "float") == 0) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1620 r = float_format;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1621 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1622 else {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1623 PyErr_SetString(PyExc_ValueError,
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1624 "__getformat__() argument 1 must be "
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1625 "'double' or 'float'");
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1626 return NULL;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1627 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1628
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1629 switch (r) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1630 case unknown_format:
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1631 return PyUnicode_FromString("unknown");
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1632 case ieee_little_endian_format:
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1633 return PyUnicode_FromString("IEEE, little-endian");
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1634 case ieee_big_endian_format:
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1635 return PyUnicode_FromString("IEEE, big-endian");
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1636 default:
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1637 Py_FatalError("insane float_format or double_format");
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1638 return NULL;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1639 }
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1640 }
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1641
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1642 PyDoc_STRVAR(float_getformat_doc,
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1643 "float.__getformat__(typestr) -> string\n"
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1644 "\n"
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1645 "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
1646 "used in Python's test suite.\n"
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1647 "\n"
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1648 "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
1649 "'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
1650 "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
1651
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1652 static PyObject *
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1653 float_setformat(PyTypeObject *v, PyObject* args)
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1654 {
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1655 char* typestr;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1656 char* format;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1657 float_format_type f;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1658 float_format_type detected;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1659 float_format_type *p;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1660
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1661 if (!PyArg_ParseTuple(args, "ss:__setformat__", &typestr, &format))
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1662 return NULL;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1663
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1664 if (strcmp(typestr, "double") == 0) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1665 p = &double_format;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1666 detected = detected_double_format;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1667 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1668 else if (strcmp(typestr, "float") == 0) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1669 p = &float_format;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1670 detected = detected_float_format;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1671 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1672 else {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1673 PyErr_SetString(PyExc_ValueError,
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1674 "__setformat__() argument 1 must "
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1675 "be 'double' or 'float'");
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1676 return NULL;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1677 }
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1678
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1679 if (strcmp(format, "unknown") == 0) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1680 f = unknown_format;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1681 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1682 else if (strcmp(format, "IEEE, little-endian") == 0) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1683 f = ieee_little_endian_format;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1684 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1685 else if (strcmp(format, "IEEE, big-endian") == 0) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1686 f = ieee_big_endian_format;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1687 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1688 else {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1689 PyErr_SetString(PyExc_ValueError,
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1690 "__setformat__() argument 2 must be "
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1691 "'unknown', 'IEEE, little-endian' or "
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1692 "'IEEE, big-endian'");
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1693 return NULL;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1694
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1695 }
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1696
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1697 if (f != unknown_format && f != detected) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1698 PyErr_Format(PyExc_ValueError,
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1699 "can only set %s format to 'unknown' or the "
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1700 "detected platform value", typestr);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1701 return NULL;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1702 }
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1703
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1704 *p = f;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1705 Py_RETURN_NONE;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1706 }
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1707
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1708 PyDoc_STRVAR(float_setformat_doc,
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1709 "float.__setformat__(typestr, fmt) -> None\n"
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1710 "\n"
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1711 "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
1712 "used in Python's test suite.\n"
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1713 "\n"
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1714 "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
1715 "'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
1716 "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
1717 "\n"
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1718 "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
1719 "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
1720
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
1721 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
1722 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
1723 {
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1724 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
1725 }
d3a5c796c8ba Changes to long and float by Jeffrey Jasskin to conform to PEP 3141.
Guido van Rossum <guido@python.org>
parents: 42334
diff changeset
1726
42817
5355337709e1 Implementation of PEP 3101, Advanced String Formatting.
Eric Smith <eric@trueblade.com>
parents: 42753
diff changeset
1727 static PyObject *
5355337709e1 Implementation of PEP 3101, Advanced String Formatting.
Eric Smith <eric@trueblade.com>
parents: 42753
diff changeset
1728 float__format__(PyObject *self, PyObject *args)
5355337709e1 Implementation of PEP 3101, Advanced String Formatting.
Eric Smith <eric@trueblade.com>
parents: 42753
diff changeset
1729 {
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1730 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
1731
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1732 if (!PyArg_ParseTuple(args, "U:__format__", &format_spec))
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1733 return NULL;
72475
8beaa9a37387 Implement PEP 393.
Martin v. Löwis <martin@v.loewis.de>
parents: 71810
diff changeset
1734 return _PyFloat_FormatAdvanced(self, format_spec, 0,
8beaa9a37387 Implement PEP 393.
Martin v. Löwis <martin@v.loewis.de>
parents: 71810
diff changeset
1735 PyUnicode_GET_LENGTH(format_spec));
42817
5355337709e1 Implementation of PEP 3101, Advanced String Formatting.
Eric Smith <eric@trueblade.com>
parents: 42753
diff changeset
1736 }
5355337709e1 Implementation of PEP 3101, Advanced String Formatting.
Eric Smith <eric@trueblade.com>
parents: 42753
diff changeset
1737
5355337709e1 Implementation of PEP 3101, Advanced String Formatting.
Eric Smith <eric@trueblade.com>
parents: 42753
diff changeset
1738 PyDoc_STRVAR(float__format__doc,
5355337709e1 Implementation of PEP 3101, Advanced String Formatting.
Eric Smith <eric@trueblade.com>
parents: 42753
diff changeset
1739 "float.__format__(format_spec) -> string\n"
5355337709e1 Implementation of PEP 3101, Advanced String Formatting.
Eric Smith <eric@trueblade.com>
parents: 42753
diff changeset
1740 "\n"
5355337709e1 Implementation of PEP 3101, Advanced String Formatting.
Eric Smith <eric@trueblade.com>
parents: 42753
diff changeset
1741 "Formats the float according to format_spec.");
5355337709e1 Implementation of PEP 3101, Advanced String Formatting.
Eric Smith <eric@trueblade.com>
parents: 42753
diff changeset
1742
5355337709e1 Implementation of PEP 3101, Advanced String Formatting.
Eric Smith <eric@trueblade.com>
parents: 42753
diff changeset
1743
27521
17bfd5dbc0f1 Implement appropriate __getnewargs__ for all immutable subclassable builtin
Guido van Rossum <guido@python.org>
parents: 27484
diff changeset
1744 static PyMethodDef float_methods[] = {
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1745 {"conjugate", (PyCFunction)float_float, METH_NOARGS,
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1746 "Returns self, the complex conjugate of any float."},
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1747 {"__trunc__", (PyCFunction)float_trunc, METH_NOARGS,
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1748 "Returns the Integral closest to x between 0 and x."},
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1749 {"__round__", (PyCFunction)float_round, METH_VARARGS,
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1750 "Returns the Integral closest to x, rounding half toward even.\n"
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1751 "When an argument is passed, works like built-in round(x, ndigits)."},
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1752 {"as_integer_ratio", (PyCFunction)float_as_integer_ratio, METH_NOARGS,
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1753 float_as_integer_ratio_doc},
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1754 {"fromhex", (PyCFunction)float_fromhex,
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1755 METH_O|METH_CLASS, float_fromhex_doc},
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1756 {"hex", (PyCFunction)float_hex,
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1757 METH_NOARGS, float_hex_doc},
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1758 {"is_integer", (PyCFunction)float_is_integer, METH_NOARGS,
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1759 "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
1760 #if 0
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1761 {"is_inf", (PyCFunction)float_is_inf, METH_NOARGS,
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1762 "Returns True if the float is positive or negative infinite."},
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1763 {"is_finite", (PyCFunction)float_is_finite, METH_NOARGS,
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1764 "Returns True if the float is finite, neither infinite nor NaN."},
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1765 {"is_nan", (PyCFunction)float_is_nan, METH_NOARGS,
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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parents: 54232
diff changeset
1766 "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
1767 #endif
61467
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diff changeset
1768 {"__getnewargs__", (PyCFunction)float_getnewargs, METH_NOARGS},
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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diff changeset
1769 {"__getformat__", (PyCFunction)float_getformat,
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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parents: 54232
diff changeset
1770 METH_O|METH_CLASS, float_getformat_doc},
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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parents: 54232
diff changeset
1771 {"__setformat__", (PyCFunction)float_setformat,
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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parents: 54232
diff changeset
1772 METH_VARARGS|METH_CLASS, float_setformat_doc},
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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parents: 54232
diff changeset
1773 {"__format__", (PyCFunction)float__format__,
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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parents: 54232
diff changeset
1774 METH_VARARGS, float__format__doc},
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1775 {NULL, NULL} /* sentinel */
27521
17bfd5dbc0f1 Implement appropriate __getnewargs__ for all immutable subclassable builtin
Guido van Rossum <guido@python.org>
parents: 27484
diff changeset
1776 };
17bfd5dbc0f1 Implement appropriate __getnewargs__ for all immutable subclassable builtin
Guido van Rossum <guido@python.org>
parents: 27484
diff changeset
1777
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
1778 static PyGetSetDef float_getset[] = {
61467
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parents: 54232
diff changeset
1779 {"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
1780 (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
1781 "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
1782 NULL},
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1783 {"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
1784 (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
1785 "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
1786 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
1787 {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
1788 };
d3a5c796c8ba Changes to long and float by Jeffrey Jasskin to conform to PEP 3141.
Guido van Rossum <guido@python.org>
parents: 42334
diff changeset
1789
23832
ed1ba37a46b7 Patch #568124: Add doc string macros.
Martin v. Löwis <martin@v.loewis.de>
parents: 23344
diff changeset
1790 PyDoc_STRVAR(float_doc,
18933
09df3254b49d Merge of descr-branch back into trunk.
Tim Peters <tim.peters@gmail.com>
parents: 18838
diff changeset
1791 "float(x) -> floating point number\n\
09df3254b49d Merge of descr-branch back into trunk.
Tim Peters <tim.peters@gmail.com>
parents: 18838
diff changeset
1792 \n\
23832
ed1ba37a46b7 Patch #568124: Add doc string macros.
Martin v. Löwis <martin@v.loewis.de>
parents: 23344
diff changeset
1793 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
1794
09df3254b49d Merge of descr-branch back into trunk.
Tim Peters <tim.peters@gmail.com>
parents: 18838
diff changeset
1795
5396
d1447950fa04 Quickly renamed the last directory.
Guido van Rossum <guido@python.org>
parents: 5197
diff changeset
1796 static PyNumberMethods float_as_number = {
61467
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diff changeset
1797 float_add, /*nb_add*/
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1798 float_sub, /*nb_subtract*/
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1799 float_mul, /*nb_multiply*/
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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parents: 54232
diff changeset
1800 float_rem, /*nb_remainder*/
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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parents: 54232
diff changeset
1801 float_divmod, /*nb_divmod*/
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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diff changeset
1802 float_pow, /*nb_power*/
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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diff changeset
1803 (unaryfunc)float_neg, /*nb_negative*/
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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diff changeset
1804 (unaryfunc)float_float, /*nb_positive*/
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diff changeset
1805 (unaryfunc)float_abs, /*nb_absolute*/
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diff changeset
1806 (inquiry)float_bool, /*nb_bool*/
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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parents: 54232
diff changeset
1807 0, /*nb_invert*/
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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parents: 54232
diff changeset
1808 0, /*nb_lshift*/
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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parents: 54232
diff changeset
1809 0, /*nb_rshift*/
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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parents: 54232
diff changeset
1810 0, /*nb_and*/
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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diff changeset
1811 0, /*nb_xor*/
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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diff changeset
1812 0, /*nb_or*/
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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diff changeset
1813 float_trunc, /*nb_int*/
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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diff changeset
1814 0, /*nb_reserved*/
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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diff changeset
1815 float_float, /*nb_float*/
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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diff changeset
1816 0, /* nb_inplace_add */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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diff changeset
1817 0, /* nb_inplace_subtract */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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diff changeset
1818 0, /* nb_inplace_multiply */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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1819 0, /* nb_inplace_remainder */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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diff changeset
1820 0, /* nb_inplace_power */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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diff changeset
1821 0, /* nb_inplace_lshift */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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diff changeset
1822 0, /* nb_inplace_rshift */
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diff changeset
1823 0, /* nb_inplace_and */
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diff changeset
1824 0, /* nb_inplace_xor */
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diff changeset
1825 0, /* nb_inplace_or */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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diff changeset
1826 float_floor_div, /* nb_floor_divide */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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parents: 54232
diff changeset
1827 float_div, /* nb_true_divide */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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parents: 54232
diff changeset
1828 0, /* nb_inplace_floor_divide */
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diff changeset
1829 0, /* nb_inplace_true_divide */
6
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
1830 };
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
1831
5396
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Guido van Rossum <guido@python.org>
parents: 5197
diff changeset
1832 PyTypeObject PyFloat_Type = {
61467
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diff changeset
1833 PyVarObject_HEAD_INIT(&PyType_Type, 0)
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diff changeset
1834 "float",
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diff changeset
1835 sizeof(PyFloatObject),
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diff changeset
1836 0,
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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diff changeset
1837 (destructor)float_dealloc, /* tp_dealloc */
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diff changeset
1838 0, /* tp_print */
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diff changeset
1839 0, /* tp_getattr */
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diff changeset
1840 0, /* tp_setattr */
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diff changeset
1841 0, /* tp_reserved */
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diff changeset
1842 (reprfunc)float_repr, /* tp_repr */
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parents: 54232
diff changeset
1843 &float_as_number, /* tp_as_number */
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parents: 54232
diff changeset
1844 0, /* tp_as_sequence */
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parents: 54232
diff changeset
1845 0, /* tp_as_mapping */
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parents: 54232
diff changeset
1846 (hashfunc)float_hash, /* tp_hash */
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1847 0, /* tp_call */
63750
eafe07d40eb7 Issue #9337: Make float.__str__ identical to float.__repr__.
Mark Dickinson <dickinsm@gmail.com>
parents: 62834
diff changeset
1848 (reprfunc)float_repr, /* tp_str */
61467
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parents: 54232
diff changeset
1849 PyObject_GenericGetAttr, /* tp_getattro */
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1850 0, /* tp_setattro */
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1851 0, /* tp_as_buffer */
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parents: 54232
diff changeset
1852 Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE, /* tp_flags */
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1853 float_doc, /* tp_doc */
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parents: 54232
diff changeset
1854 0, /* tp_traverse */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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parents: 54232
diff changeset
1855 0, /* tp_clear */
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1856 float_richcompare, /* tp_richcompare */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1857 0, /* tp_weaklistoffset */
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1858 0, /* tp_iter */
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1859 0, /* tp_iternext */
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1860 float_methods, /* tp_methods */
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1861 0, /* tp_members */
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1862 float_getset, /* tp_getset */
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1863 0, /* tp_base */
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diff changeset
1864 0, /* tp_dict */
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parents: 54232
diff changeset
1865 0, /* tp_descr_get */
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parents: 54232
diff changeset
1866 0, /* tp_descr_set */
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parents: 54232
diff changeset
1867 0, /* tp_dictoffset */
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diff changeset
1868 0, /* tp_init */
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parents: 54232
diff changeset
1869 0, /* tp_alloc */
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1870 float_new, /* tp_new */
6
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
1871 };
5936
80d24364b932 Added _Fini() routines to free up some memory
Guido van Rossum <guido@python.org>
parents: 5504
diff changeset
1872
80d24364b932 Added _Fini() routines to free up some memory
Guido van Rossum <guido@python.org>
parents: 5504
diff changeset
1873 void
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1874 _PyFloat_Init(void)
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1875 {
61467
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diff changeset
1876 /* We attempt to determine if this machine is using IEEE
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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parents: 54232
diff changeset
1877 floating point formats by peering at the bits of some
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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parents: 54232
diff changeset
1878 carefully chosen values. If it looks like we are on an
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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parents: 54232
diff changeset
1879 IEEE platform, the float packing/unpacking routines can
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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diff changeset
1880 just copy bits, if not they resort to arithmetic & shifts
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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diff changeset
1881 and masks. The shifts & masks approach works on all finite
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diff changeset
1882 values, but what happens to infinities, NaNs and signed
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diff changeset
1883 zeroes on packing is an accident, and attempting to unpack
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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diff changeset
1884 a NaN or an infinity will raise an exception.
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1885
61467
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1886 Note that if we're on some whacked-out platform which uses
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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diff changeset
1887 IEEE formats but isn't strictly little-endian or big-
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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diff changeset
1888 endian, we will fall back to the portable shifts & masks
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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diff changeset
1889 method. */
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1890
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1891 #if SIZEOF_DOUBLE == 8
61467
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1892 {
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1893 double x = 9006104071832581.0;
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diff changeset
1894 if (memcmp(&x, "\x43\x3f\xff\x01\x02\x03\x04\x05", 8) == 0)
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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diff changeset
1895 detected_double_format = ieee_big_endian_format;
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diff changeset
1896 else if (memcmp(&x, "\x05\x04\x03\x02\x01\xff\x3f\x43", 8) == 0)
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1897 detected_double_format = ieee_little_endian_format;
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1898 else
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1899 detected_double_format = unknown_format;
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1900 }
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diff changeset
1901 #else
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1902 detected_double_format = unknown_format;
34972
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Michael W. Hudson <mwh@python.net>
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1903 #endif
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
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1904
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1905 #if SIZEOF_FLOAT == 4
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1906 {
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1907 float y = 16711938.0;
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1908 if (memcmp(&y, "\x4b\x7f\x01\x02", 4) == 0)
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1909 detected_float_format = ieee_big_endian_format;
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1910 else if (memcmp(&y, "\x02\x01\x7f\x4b", 4) == 0)
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1911 detected_float_format = ieee_little_endian_format;
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1912 else
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1913 detected_float_format = unknown_format;
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1914 }
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1915 #else
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1916 detected_float_format = unknown_format;
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Michael W. Hudson <mwh@python.net>
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1917 #endif
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
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1918
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1919 double_format = detected_double_format;
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1920 float_format = detected_float_format;
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1921
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1922 /* Init float info */
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1923 if (FloatInfoType.tp_name == 0)
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1924 PyStructSequence_InitType(&FloatInfoType, &floatinfo_desc);
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1925 }
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1926
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1927 int
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1928 PyFloat_ClearFreeList(void)
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1929 {
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1930 PyFloatObject *p;
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1931 PyFloatBlock *list, *next;
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1932 int i;
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1933 int u; /* remaining unfreed floats per block */
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1934 int freelist_size = 0;
10382
e2a08a81e56f OK, try again. Vladimir gave me a fix for the alignment bus error,
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1935
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1936 list = block_list;
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1937 block_list = NULL;
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1938 free_list = NULL;
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1939 while (list != NULL) {
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1940 u = 0;
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1941 for (i = 0, p = &list->objects[0];
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1942 i < N_FLOATOBJECTS;
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1943 i++, p++) {
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1944 if (PyFloat_CheckExact(p) && Py_REFCNT(p) != 0)
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1945 u++;
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1946 }
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1947 next = list->next;
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1948 if (u) {
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1949 list->next = block_list;
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1950 block_list = list;
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1951 for (i = 0, p = &list->objects[0];
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1952 i < N_FLOATOBJECTS;
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1953 i++, p++) {
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1954 if (!PyFloat_CheckExact(p) ||
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1955 Py_REFCNT(p) == 0) {
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1956 Py_TYPE(p) = (struct _typeobject *)
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1957 free_list;
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1958 free_list = p;
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1959 }
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1960 }
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1961 }
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1962 else {
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1963 PyMem_FREE(list);
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1964 }
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1965 freelist_size += u;
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1966 list = next;
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1967 }
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1968 return freelist_size;
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1969 }
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diff changeset
1970
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
1971 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
1972 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
1973 {
61467
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1974 PyFloatObject *p;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1975 PyFloatBlock *list;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1976 int i;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1977 int u; /* total unfreed floats per block */
45145
3d7b84daa34a Merged revisions 60481,60485,60489-60492,60494-60496,60498-60499,60501-60503,60505-60506,60508-60509,60523-60524,60532,60543,60545,60547-60548,60552-60567 via svnmerge from
Christian Heimes <christian@cheimes.de>
parents: 45134
diff changeset
1978
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
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diff changeset
1979 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
1980
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
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diff changeset
1981 if (!Py_VerboseFlag)
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1982 return;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1983 fprintf(stderr, "# cleanup floats");
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1984 if (!u) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1985 fprintf(stderr, "\n");
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1986 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1987 else {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1988 fprintf(stderr,
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1989 ": %d unfreed float%s\n",
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1990 u, u == 1 ? "" : "s");
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1991 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1992 if (Py_VerboseFlag > 1) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1993 list = block_list;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1994 while (list != NULL) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1995 for (i = 0, p = &list->objects[0];
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1996 i < N_FLOATOBJECTS;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1997 i++, p++) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1998 if (PyFloat_CheckExact(p) &&
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1999 Py_REFCNT(p) != 0) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2000 char *buf = PyOS_double_to_string(
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2001 PyFloat_AS_DOUBLE(p), 'r',
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2002 0, 0, NULL);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2003 if (buf) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2004 /* XXX(twouters) cast
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2005 refcount to long
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2006 until %zd is
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2007 universally
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2008 available
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2009 */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2010 fprintf(stderr,
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2011 "# <float at %p, refcnt=%ld, val=%s>\n",
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2012 p, (long)Py_REFCNT(p), buf);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2013 PyMem_Free(buf);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2014 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2015 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2016 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2017 list = list->next;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2018 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2019 }
5936
80d24364b932 Added _Fini() routines to free up some memory
Guido van Rossum <guido@python.org>
parents: 5504
diff changeset
2020 }
28335
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2021
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2022 /*----------------------------------------------------------------------------
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2023 * _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
2024 */
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2025 int
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2026 _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
2027 {
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2028 if (float_format == unknown_format) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2029 unsigned char sign;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2030 int e;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2031 double f;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2032 unsigned int fbits;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2033 int incr = 1;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2034
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2035 if (le) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2036 p += 3;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2037 incr = -1;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2038 }
28335
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2039
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2040 if (x < 0) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2041 sign = 1;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2042 x = -x;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2043 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2044 else
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2045 sign = 0;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2046
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2047 f = frexp(x, &e);
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2048
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2049 /* Normalize f to be in the range [1.0, 2.0) */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2050 if (0.5 <= f && f < 1.0) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2051 f *= 2.0;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2052 e--;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2053 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2054 else if (f == 0.0)
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2055 e = 0;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2056 else {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2057 PyErr_SetString(PyExc_SystemError,
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2058 "frexp() result out of range");
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2059 return -1;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2060 }
28335
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2061
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2062 if (e >= 128)
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2063 goto Overflow;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2064 else if (e < -126) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2065 /* Gradual underflow */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2066 f = ldexp(f, 126 + e);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2067 e = 0;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2068 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2069 else if (!(e == 0 && f == 0.0)) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2070 e += 127;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2071 f -= 1.0; /* Get rid of leading 1 */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2072 }
28335
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2073
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2074 f *= 8388608.0; /* 2**23 */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2075 fbits = (unsigned int)(f + 0.5); /* Round */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2076 assert(fbits <= 8388608);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2077 if (fbits >> 23) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2078 /* The carry propagated out of a string of 23 1 bits. */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2079 fbits = 0;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2080 ++e;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2081 if (e >= 255)
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2082 goto Overflow;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2083 }
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2084
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2085 /* First byte */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2086 *p = (sign << 7) | (e >> 1);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2087 p += incr;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2088
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2089 /* Second byte */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2090 *p = (char) (((e & 1) << 7) | (fbits >> 16));
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2091 p += incr;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2092
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2093 /* Third byte */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2094 *p = (fbits >> 8) & 0xFF;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2095 p += incr;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2096
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2097 /* Fourth byte */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2098 *p = fbits & 0xFF;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2099
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2100 /* Done */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2101 return 0;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2102
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2103 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2104 else {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2105 float y = (float)x;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2106 const char *s = (char*)&y;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2107 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
2108
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2109 if (Py_IS_INFINITY(y) && !Py_IS_INFINITY(x))
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2110 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
2111
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2112 if ((float_format == ieee_little_endian_format && !le)
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2113 || (float_format == ieee_big_endian_format && le)) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2114 p += 3;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2115 incr = -1;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2116 }
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
2117
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2118 for (i = 0; i < 4; i++) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2119 *p = *s++;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2120 p += incr;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2121 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2122 return 0;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2123 }
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
2124 Overflow:
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2125 PyErr_SetString(PyExc_OverflowError,
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2126 "float too large to pack with f format");
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2127 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
2128 }
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2129
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2130 int
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2131 _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
2132 {
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2133 if (double_format == unknown_format) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2134 unsigned char sign;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2135 int e;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2136 double f;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2137 unsigned int fhi, flo;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2138 int incr = 1;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2139
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2140 if (le) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2141 p += 7;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2142 incr = -1;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2143 }
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2144
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2145 if (x < 0) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2146 sign = 1;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2147 x = -x;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2148 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2149 else
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2150 sign = 0;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2151
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2152 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
2153
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2154 /* Normalize f to be in the range [1.0, 2.0) */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2155 if (0.5 <= f && f < 1.0) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2156 f *= 2.0;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2157 e--;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2158 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2159 else if (f == 0.0)
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2160 e = 0;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2161 else {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2162 PyErr_SetString(PyExc_SystemError,
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2163 "frexp() result out of range");
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2164 return -1;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2165 }
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2166
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2167 if (e >= 1024)
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2168 goto Overflow;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2169 else if (e < -1022) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2170 /* Gradual underflow */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2171 f = ldexp(f, 1022 + e);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2172 e = 0;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2173 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2174 else if (!(e == 0 && f == 0.0)) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2175 e += 1023;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2176 f -= 1.0; /* Get rid of leading 1 */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2177 }
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2178
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2179 /* fhi receives the high 28 bits; flo the low 24 bits (== 52 bits) */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2180 f *= 268435456.0; /* 2**28 */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2181 fhi = (unsigned int)f; /* Truncate */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2182 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
2183
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2184 f -= (double)fhi;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2185 f *= 16777216.0; /* 2**24 */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2186 flo = (unsigned int)(f + 0.5); /* Round */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2187 assert(flo <= 16777216);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2188 if (flo >> 24) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2189 /* The carry propagated out of a string of 24 1 bits. */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2190 flo = 0;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2191 ++fhi;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2192 if (fhi >> 28) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2193 /* And it also progagated out of the next 28 bits. */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2194 fhi = 0;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2195 ++e;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2196 if (e >= 2047)
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2197 goto Overflow;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2198 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2199 }
28335
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2200
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2201 /* First byte */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2202 *p = (sign << 7) | (e >> 4);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2203 p += incr;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2204
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2205 /* Second byte */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2206 *p = (unsigned char) (((e & 0xF) << 4) | (fhi >> 24));
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2207 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
2208
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2209 /* Third byte */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2210 *p = (fhi >> 16) & 0xFF;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2211 p += incr;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2212
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2213 /* Fourth byte */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2214 *p = (fhi >> 8) & 0xFF;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2215 p += incr;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2216
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2217 /* Fifth byte */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2218 *p = fhi & 0xFF;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2219 p += incr;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2220
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2221 /* Sixth byte */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2222 *p = (flo >> 16) & 0xFF;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2223 p += incr;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2224
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2225 /* Seventh byte */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2226 *p = (flo >> 8) & 0xFF;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2227 p += incr;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2228
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2229 /* Eighth byte */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2230 *p = flo & 0xFF;
68102
e2f96bd29252 Issue #8914: fix various warnings from the Clang static analyzer v254.
Brett Cannon <bcannon@gmail.com>
parents: 66704
diff changeset
2231 /* p += incr; */
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2232
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2233 /* Done */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2234 return 0;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2235
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2236 Overflow:
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2237 PyErr_SetString(PyExc_OverflowError,
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2238 "float too large to pack with d format");
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2239 return -1;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2240 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2241 else {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2242 const char *s = (char*)&x;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2243 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
2244
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2245 if ((double_format == ieee_little_endian_format && !le)
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2246 || (double_format == ieee_big_endian_format && le)) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2247 p += 7;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2248 incr = -1;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2249 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2250
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2251 for (i = 0; i < 8; i++) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2252 *p = *s++;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2253 p += incr;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2254 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2255 return 0;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2256 }
28335
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2257 }
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2258
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2259 double
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2260 _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
2261 {
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2262 if (float_format == unknown_format) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2263 unsigned char sign;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2264 int e;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2265 unsigned int f;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2266 double x;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2267 int incr = 1;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2268
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2269 if (le) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2270 p += 3;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2271 incr = -1;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2272 }
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2273
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2274 /* First byte */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2275 sign = (*p >> 7) & 1;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2276 e = (*p & 0x7F) << 1;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2277 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
2278
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2279 /* Second byte */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2280 e |= (*p >> 7) & 1;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2281 f = (*p & 0x7F) << 16;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2282 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
2283
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2284 if (e == 255) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2285 PyErr_SetString(
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2286 PyExc_ValueError,
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2287 "can't unpack IEEE 754 special value "
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2288 "on non-IEEE platform");
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2289 return -1;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2290 }
28335
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2291
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2292 /* Third byte */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2293 f |= *p << 8;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2294 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
2295
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2296 /* Fourth byte */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2297 f |= *p;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2298
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2299 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
2300
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2301 /* XXX This sadly ignores Inf/NaN issues */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2302 if (e == 0)
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2303 e = -126;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2304 else {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2305 x += 1.0;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2306 e -= 127;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2307 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2308 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
2309
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2310 if (sign)
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2311 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
2312
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2313 return x;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2314 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2315 else {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2316 float x;
35987
8eda1a58a490 Fix bug
Michael W. Hudson <mwh@python.net>
parents: 35178
diff changeset
2317
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2318 if ((float_format == ieee_little_endian_format && !le)
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2319 || (float_format == ieee_big_endian_format && le)) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2320 char buf[4];
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2321 char *d = &buf[3];
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2322 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
2323
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2324 for (i = 0; i < 4; i++) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2325 *d-- = *p++;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2326 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2327 memcpy(&x, buf, 4);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2328 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2329 else {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2330 memcpy(&x, p, 4);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2331 }
35987
8eda1a58a490 Fix bug
Michael W. Hudson <mwh@python.net>
parents: 35178
diff changeset
2332
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2333 return x;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2334 }
28335
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2335 }
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2336
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2337 double
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2338 _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
2339 {
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2340 if (double_format == unknown_format) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2341 unsigned char sign;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2342 int e;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2343 unsigned int fhi, flo;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2344 double x;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2345 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
2346
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2347 if (le) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2348 p += 7;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2349 incr = -1;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2350 }
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2351
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2352 /* First byte */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2353 sign = (*p >> 7) & 1;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2354 e = (*p & 0x7F) << 4;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2355
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2356 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
2357
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2358 /* Second byte */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2359 e |= (*p >> 4) & 0xF;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2360 fhi = (*p & 0xF) << 24;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2361 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
2362
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2363 if (e == 2047) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2364 PyErr_SetString(
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2365 PyExc_ValueError,
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2366 "can't unpack IEEE 754 special value "
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2367 "on non-IEEE platform");
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2368 return -1.0;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2369 }
28335
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2370
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2371 /* Third byte */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2372 fhi |= *p << 16;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2373 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
2374
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2375 /* Fourth byte */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2376 fhi |= *p << 8;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2377 p += incr;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2378
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2379 /* Fifth byte */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2380 fhi |= *p;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2381 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
2382
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2383 /* Sixth byte */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2384 flo = *p << 16;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2385 p += incr;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2386
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2387 /* Seventh byte */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2388 flo |= *p << 8;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2389 p += incr;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2390
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2391 /* Eighth byte */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2392 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
2393
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2394 x = (double)fhi + (double)flo / 16777216.0; /* 2**24 */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2395 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
2396
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2397 if (e == 0)
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2398 e = -1022;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2399 else {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2400 x += 1.0;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2401 e -= 1023;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2402 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2403 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
2404
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2405 if (sign)
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2406 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
2407
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2408 return x;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2409 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2410 else {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2411 double x;
35987
8eda1a58a490 Fix bug
Michael W. Hudson <mwh@python.net>
parents: 35178
diff changeset
2412
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2413 if ((double_format == ieee_little_endian_format && !le)
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2414 || (double_format == ieee_big_endian_format && le)) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2415 char buf[8];
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2416 char *d = &buf[7];
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2417 int i;
35987
8eda1a58a490 Fix bug
Michael W. Hudson <mwh@python.net>
parents: 35178
diff changeset
2418
61467
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2419 for (i = 0; i < 8; i++) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2420 *d-- = *p++;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2421 }
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2422 memcpy(&x, buf, 8);
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2423 }
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2424 else {
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2425 memcpy(&x, p, 8);
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2426 }
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2427
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2428 return x;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2429 }
28335
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2430 }