Mercurial > cpython-lru_cache-weakref

annotate Objects/floatobject.c @ 74917:76dfd1f08025

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lib2to3 tests: Don't use deprecated API, switch to assertRegex()
author Victor Stinner <victor.stinner@haypocalc.com>
date Mon, 13 Feb 2012 23:31:26 +0100
parents 265d35e8fe82
children 37ebe64d39d2
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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
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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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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,
702367da2c72 SF bug #513866: Float/long comparison anomaly.
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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
702367da2c72 SF bug #513866: Float/long comparison anomaly.
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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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parents: 5197
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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diff changeset
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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diff changeset
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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diff changeset
826 PyExc_ValueError);
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diff changeset
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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diff changeset
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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diff changeset
859 }
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860 #endif
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diff changeset
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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diff changeset
903 int decpt, sign;
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diff changeset
904 PyObject *result = NULL;
74662
5b8800004955 Issue #13889: Add missing _Py_SET_53BIT_PRECISION_* calls around uses of dtoa.c functions in float round.
Mark Dickinson <mdickinson@enthought.com>
parents: 69497
diff changeset
905 _Py_SET_53BIT_PRECISION_HEADER;
53218
d43d64252d36 Issue #1869 (and 4707, 5118, 5473, 1456775): use the new
Mark Dickinson <dickinsm@gmail.com>
parents: 53187
diff changeset
906
61467
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907 /* round to a decimal string */
74662
5b8800004955 Issue #13889: Add missing _Py_SET_53BIT_PRECISION_* calls around uses of dtoa.c functions in float round.
Mark Dickinson <mdickinson@enthought.com>
parents: 69497
diff changeset
908 _Py_SET_53BIT_PRECISION_START;
61467
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diff changeset
909 buf = _Py_dg_dtoa(x, 3, ndigits, &decpt, &sign, &buf_end);
74662
5b8800004955 Issue #13889: Add missing _Py_SET_53BIT_PRECISION_* calls around uses of dtoa.c functions in float round.
Mark Dickinson <mdickinson@enthought.com>
parents: 69497
diff changeset
910 _Py_SET_53BIT_PRECISION_END;
61467
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911 if (buf == NULL) {
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912 PyErr_NoMemory();
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913 return NULL;
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914 }
53218
d43d64252d36 Issue #1869 (and 4707, 5118, 5473, 1456775): use the new
Mark Dickinson <dickinsm@gmail.com>
parents: 53187
diff changeset
915
61467
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916 /* Get new buffer if shortbuf is too small. Space needed <= buf_end -
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917 buf + 8: (1 extra for '0', 1 for sign, 5 for exp, 1 for '\0'). */
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918 buflen = buf_end - buf;
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919 if (buflen + 8 > mybuflen) {
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920 mybuflen = buflen+8;
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921 mybuf = (char *)PyMem_Malloc(mybuflen);
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922 if (mybuf == NULL) {
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923 PyErr_NoMemory();
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924 goto exit;
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925 }
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diff changeset
926 }
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diff changeset
927 /* copy buf to mybuf, adding exponent, sign and leading 0 */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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diff changeset
928 PyOS_snprintf(mybuf, mybuflen, "%s0%se%d", (sign ? "-" : ""),
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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diff changeset
929 buf, decpt - (int)buflen);
53218
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Mark Dickinson <dickinsm@gmail.com>
parents: 53187
diff changeset
930
61467
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diff changeset
931 /* and convert the resulting string back to a double */
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diff changeset
932 errno = 0;
74662
5b8800004955 Issue #13889: Add missing _Py_SET_53BIT_PRECISION_* calls around uses of dtoa.c functions in float round.
Mark Dickinson <mdickinson@enthought.com>
parents: 69497
diff changeset
933 _Py_SET_53BIT_PRECISION_START;
61467
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diff changeset
934 rounded = _Py_dg_strtod(mybuf, NULL);
74662
5b8800004955 Issue #13889: Add missing _Py_SET_53BIT_PRECISION_* calls around uses of dtoa.c functions in float round.
Mark Dickinson <mdickinson@enthought.com>
parents: 69497
diff changeset
935 _Py_SET_53BIT_PRECISION_END;
61467
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diff changeset
936 if (errno == ERANGE && fabs(rounded) >= 1.)
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diff changeset
937 PyErr_SetString(PyExc_OverflowError,
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diff changeset
938 "rounded value too large to represent");
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diff changeset
939 else
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diff changeset
940 result = PyFloat_FromDouble(rounded);
53218
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Mark Dickinson <dickinsm@gmail.com>
parents: 53187
diff changeset
941
61467
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diff changeset
942 /* done computing value; now clean up */
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diff changeset
943 if (mybuf != shortbuf)
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diff changeset
944 PyMem_Free(mybuf);
53218
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Mark Dickinson <dickinsm@gmail.com>
parents: 53187
diff changeset
945 exit:
61467
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946 _Py_dg_freedtoa(buf);
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diff changeset
947 return result;
53218
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Mark Dickinson <dickinsm@gmail.com>
parents: 53187
diff changeset
948 }
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diff changeset
949
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parents: 53187
diff changeset
950 #else /* PY_NO_SHORT_FLOAT_REPR */
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parents: 53187
diff changeset
951
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parents: 53187
diff changeset
952 /* fallback version, to be used when correctly rounded binary<->decimal
d43d64252d36 Issue #1869 (and 4707, 5118, 5473, 1456775): use the new
Mark Dickinson <dickinsm@gmail.com>
parents: 53187
diff changeset
953 conversions aren't available */
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diff changeset
954
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parents: 53187
diff changeset
955 static PyObject *
d43d64252d36 Issue #1869 (and 4707, 5118, 5473, 1456775): use the new
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diff changeset
956 double_round(double x, int ndigits) {
61467
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957 double pow1, pow2, y, z;
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958 if (ndigits >= 0) {
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959 if (ndigits > 22) {
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960 /* pow1 and pow2 are each safe from overflow, but
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961 pow1*pow2 ~= pow(10.0, ndigits) might overflow */
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962 pow1 = pow(10.0, (double)(ndigits-22));
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963 pow2 = 1e22;
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964 }
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965 else {
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966 pow1 = pow(10.0, (double)ndigits);
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967 pow2 = 1.0;
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968 }
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969 y = (x*pow1)*pow2;
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970 /* if y overflows, then rounded value is exactly x */
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971 if (!Py_IS_FINITE(y))
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972 return PyFloat_FromDouble(x);
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973 }
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974 else {
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975 pow1 = pow(10.0, (double)-ndigits);
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976 pow2 = 1.0; /* unused; silences a gcc compiler warning */
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977 y = x / pow1;
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978 }
53218
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diff changeset
979
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980 z = round(y);
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981 if (fabs(y-z) == 0.5)
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982 /* halfway between two integers; use round-half-even */
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diff changeset
983 z = 2.0*round(y/2.0);
53218
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984
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985 if (ndigits >= 0)
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986 z = (z / pow2) / pow1;
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987 else
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988 z *= pow1;
53218
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989
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990 /* if computation resulted in overflow, raise OverflowError */
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991 if (!Py_IS_FINITE(z)) {
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992 PyErr_SetString(PyExc_OverflowError,
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diff changeset
993 "overflow occurred during round");
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994 return NULL;
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995 }
53218
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996
61467
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997 return PyFloat_FromDouble(z);
53218
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998 }
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999
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1000 #endif /* PY_NO_SHORT_FLOAT_REPR */
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parents: 53187
diff changeset
1001
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parents: 53187
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1002 /* round a Python float v to the closest multiple of 10**-ndigits */
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Mark Dickinson <dickinsm@gmail.com>
parents: 53187
diff changeset
1003
5396
d1447950fa04 Quickly renamed the last directory.
Guido van Rossum <guido@python.org>
parents: 5197
diff changeset
1004 static PyObject *
42753
077fe7860cc9 Finish the work on __round__ and __trunc__.
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1005 float_round(PyObject *v, PyObject *args)
077fe7860cc9 Finish the work on __round__ and __trunc__.
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1006 {
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1007 double x, rounded;
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1008 PyObject *o_ndigits = NULL;
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1009 Py_ssize_t ndigits;
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1010
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1011 x = PyFloat_AsDouble(v);
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1012 if (!PyArg_ParseTuple(args, "|O", &o_ndigits))
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1013 return NULL;
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1014 if (o_ndigits == NULL) {
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diff changeset
1015 /* single-argument round: round to nearest integer */
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1016 rounded = round(x);
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1017 if (fabs(x-rounded) == 0.5)
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1018 /* halfway case: round to even */
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1019 rounded = 2.0*round(x/2.0);
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1020 return PyLong_FromDouble(rounded);
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1021 }
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1022
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1023 /* interpret second argument as a Py_ssize_t; clips on overflow */
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1024 ndigits = PyNumber_AsSsize_t(o_ndigits, NULL);
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1025 if (ndigits == -1 && PyErr_Occurred())
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1026 return NULL;
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1027
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1028 /* nans and infinities round to themselves */
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diff changeset
1029 if (!Py_IS_FINITE(x))
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diff changeset
1030 return PyFloat_FromDouble(x);
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1031
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diff changeset
1032 /* Deal with extreme values for ndigits. For ndigits > NDIGITS_MAX, x
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1033 always rounds to itself. For ndigits < NDIGITS_MIN, x always
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diff changeset
1034 rounds to +-0.0. Here 0.30103 is an upper bound for log10(2). */
53218
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parents: 53187
diff changeset
1035 #define NDIGITS_MAX ((int)((DBL_MANT_DIG-DBL_MIN_EXP) * 0.30103))
d43d64252d36 Issue #1869 (and 4707, 5118, 5473, 1456775): use the new
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parents: 53187
diff changeset
1036 #define NDIGITS_MIN (-(int)((DBL_MAX_EXP + 1) * 0.30103))
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1037 if (ndigits > NDIGITS_MAX)
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diff changeset
1038 /* return x */
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1039 return PyFloat_FromDouble(x);
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1040 else if (ndigits < NDIGITS_MIN)
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diff changeset
1041 /* return 0.0, but with sign of x */
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diff changeset
1042 return PyFloat_FromDouble(0.0*x);
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diff changeset
1043 else
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1044 /* finite x, and ndigits is not unreasonably large */
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diff changeset
1045 return double_round(x, (int)ndigits);
53218
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Mark Dickinson <dickinsm@gmail.com>
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1046 #undef NDIGITS_MAX
d43d64252d36 Issue #1869 (and 4707, 5118, 5473, 1456775): use the new
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diff changeset
1047 #undef NDIGITS_MIN
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1048 }
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1049
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1050 static PyObject *
13454
fcc75a3748f5 ANSI-fication of the sources.
Fred Drake <fdrake@acm.org>
parents: 13447
diff changeset
1051 float_float(PyObject *v)
1049
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Guido van Rossum <guido@python.org>
parents: 955
diff changeset
1052 {
61467
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diff changeset
1053 if (PyFloat_CheckExact(v))
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diff changeset
1054 Py_INCREF(v);
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diff changeset
1055 else
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diff changeset
1056 v = PyFloat_FromDouble(((PyFloatObject *)v)->ob_fval);
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Antoine Pitrou <solipsis@pitrou.net>
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diff changeset
1057 return v;
1049
2ed511171809 Made builtins int(), long(), float(), oct() and hex() more generic.
Guido van Rossum <guido@python.org>
parents: 955
diff changeset
1058 }
2ed511171809 Made builtins int(), long(), float(), oct() and hex() more generic.
Guido van Rossum <guido@python.org>
parents: 955
diff changeset
1059
48497
2bb866d282ba Merged revisions 64974 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
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diff changeset
1060 /* turn ASCII hex characters into integer values and vice versa */
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diff changeset
1061
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diff changeset
1062 static char
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diff changeset
1063 char_from_hex(int x)
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diff changeset
1064 {
61467
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diff changeset
1065 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
1066 return Py_hexdigits[x];
48497
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diff changeset
1067 }
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diff changeset
1068
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diff changeset
1069 static int
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diff changeset
1070 hex_from_char(char c) {
61467
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diff changeset
1071 int x;
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diff changeset
1072 switch(c) {
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diff changeset
1073 case '0':
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diff changeset
1074 x = 0;
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diff changeset
1075 break;
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diff changeset
1076 case '1':
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diff changeset
1077 x = 1;
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diff changeset
1078 break;
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diff changeset
1079 case '2':
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diff changeset
1080 x = 2;
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diff changeset
1081 break;
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diff changeset
1082 case '3':
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diff changeset
1083 x = 3;
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diff changeset
1084 break;
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1085 case '4':
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diff changeset
1086 x = 4;
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diff changeset
1087 break;
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diff changeset
1088 case '5':
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diff changeset
1089 x = 5;
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diff changeset
1090 break;
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diff changeset
1091 case '6':
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diff changeset
1092 x = 6;
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diff changeset
1093 break;
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diff changeset
1094 case '7':
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diff changeset
1095 x = 7;
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diff changeset
1096 break;
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diff changeset
1097 case '8':
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diff changeset
1098 x = 8;
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diff changeset
1099 break;
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diff changeset
1100 case '9':
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diff changeset
1101 x = 9;
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diff changeset
1102 break;
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diff changeset
1103 case 'a':
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diff changeset
1104 case 'A':
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diff changeset
1105 x = 10;
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diff changeset
1106 break;
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diff changeset
1107 case 'b':
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diff changeset
1108 case 'B':
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diff changeset
1109 x = 11;
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diff changeset
1110 break;
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1111 case 'c':
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diff changeset
1112 case 'C':
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diff changeset
1113 x = 12;
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diff changeset
1114 break;
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1115 case 'd':
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diff changeset
1116 case 'D':
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diff changeset
1117 x = 13;
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diff changeset
1118 break;
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1119 case 'e':
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diff changeset
1120 case 'E':
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diff changeset
1121 x = 14;
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parents: 54232
diff changeset
1122 break;
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diff changeset
1123 case 'f':
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diff changeset
1124 case 'F':
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diff changeset
1125 x = 15;
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diff changeset
1126 break;
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diff changeset
1127 default:
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diff changeset
1128 x = -1;
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diff changeset
1129 break;
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diff changeset
1130 }
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diff changeset
1131 return x;
48497
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diff changeset
1132 }
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diff changeset
1133
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diff changeset
1134 /* convert a float to a hexadecimal string */
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diff changeset
1135
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parents: 48364
diff changeset
1136 /* TOHEX_NBITS is DBL_MANT_DIG rounded up to the next integer
2bb866d282ba Merged revisions 64974 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
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diff changeset
1137 of the form 4k+1. */
2bb866d282ba Merged revisions 64974 via svnmerge from
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diff changeset
1138 #define TOHEX_NBITS DBL_MANT_DIG + 3 - (DBL_MANT_DIG+2)%4
2bb866d282ba Merged revisions 64974 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
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diff changeset
1139
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diff changeset
1140 static PyObject *
2bb866d282ba Merged revisions 64974 via svnmerge from
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diff changeset
1141 float_hex(PyObject *v)
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diff changeset
1142 {
61467
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diff changeset
1143 double x, m;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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diff changeset
1144 int e, shift, i, si, esign;
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diff changeset
1145 /* Space for 1+(TOHEX_NBITS-1)/4 digits, a decimal point, and the
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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diff changeset
1146 trailing NUL byte. */
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diff changeset
1147 char s[(TOHEX_NBITS-1)/4+3];
48497
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diff changeset
1148
61467
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diff changeset
1149 CONVERT_TO_DOUBLE(v, x);
48497
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diff changeset
1150
61467
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diff changeset
1151 if (Py_IS_NAN(x) || Py_IS_INFINITY(x))
63750
eafe07d40eb7 Issue #9337: Make float.__str__ identical to float.__repr__.
Mark Dickinson <dickinsm@gmail.com>
parents: 62834
diff changeset
1152 return float_repr((PyFloatObject *)v);
48497
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diff changeset
1153
61467
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1154 if (x == 0.0) {
62692
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parents: 61467
diff changeset
1155 if (copysign(1.0, x) == -1.0)
61467
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diff changeset
1156 return PyUnicode_FromString("-0x0.0p+0");
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diff changeset
1157 else
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diff changeset
1158 return PyUnicode_FromString("0x0.0p+0");
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diff changeset
1159 }
48497
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diff changeset
1160
61467
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diff changeset
1161 m = frexp(fabs(x), &e);
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diff changeset
1162 shift = 1 - MAX(DBL_MIN_EXP - e, 0);
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diff changeset
1163 m = ldexp(m, shift);
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diff changeset
1164 e -= shift;
48497
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diff changeset
1165
61467
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diff changeset
1166 si = 0;
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diff changeset
1167 s[si] = char_from_hex((int)m);
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diff changeset
1168 si++;
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diff changeset
1169 m -= (int)m;
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diff changeset
1170 s[si] = '.';
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diff changeset
1171 si++;
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diff changeset
1172 for (i=0; i < (TOHEX_NBITS-1)/4; i++) {
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diff changeset
1173 m *= 16.0;
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1174 s[si] = char_from_hex((int)m);
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diff changeset
1175 si++;
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1176 m -= (int)m;
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1177 }
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1178 s[si] = '\0';
48497
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1179
61467
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1180 if (e < 0) {
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diff changeset
1181 esign = (int)'-';
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diff changeset
1182 e = -e;
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1183 }
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1184 else
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diff changeset
1185 esign = (int)'+';
48497
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diff changeset
1186
61467
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diff changeset
1187 if (x < 0.0)
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diff changeset
1188 return PyUnicode_FromFormat("-0x%sp%c%d", s, esign, e);
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1189 else
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diff changeset
1190 return PyUnicode_FromFormat("0x%sp%c%d", s, esign, e);
48497
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diff changeset
1191 }
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diff changeset
1192
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diff changeset
1193 PyDoc_STRVAR(float_hex_doc,
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diff changeset
1194 "float.hex() -> string\n\
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diff changeset
1195 \n\
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1196 Return a hexadecimal representation of a floating-point number.\n\
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diff changeset
1197 >>> (-0.1).hex()\n\
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diff changeset
1198 '-0x1.999999999999ap-4'\n\
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Mark Dickinson <dickinsm@gmail.com>
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diff changeset
1199 >>> 3.14159.hex()\n\
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diff changeset
1200 '0x1.921f9f01b866ep+1'");
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diff changeset
1201
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diff changeset
1202 /* Convert a hexadecimal string to a float. */
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diff changeset
1203
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diff changeset
1204 static PyObject *
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diff changeset
1205 float_fromhex(PyObject *cls, PyObject *arg)
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diff changeset
1206 {
61467
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diff changeset
1207 PyObject *result_as_float, *result;
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diff changeset
1208 double x;
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parents: 54232
diff changeset
1209 long exp, top_exp, lsb, key_digit;
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diff changeset
1210 char *s, *coeff_start, *s_store, *coeff_end, *exp_start, *s_end;
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diff changeset
1211 int half_eps, digit, round_up, negate=0;
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parents: 54232
diff changeset
1212 Py_ssize_t length, ndigits, fdigits, i;
48497
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diff changeset
1213
61467
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diff changeset
1214 /*
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1215 * For the sake of simplicity and correctness, we impose an artificial
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diff changeset
1216 * limit on ndigits, the total number of hex digits in the coefficient
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diff changeset
1217 * The limit is chosen to ensure that, writing exp for the exponent,
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diff changeset
1218 *
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diff changeset
1219 * (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
1220 * guaranteed to overflow (provided it's nonzero)
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diff changeset
1221 *
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diff changeset
1222 * (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
1223 * guaranteed to underflow to 0.
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diff changeset
1224 *
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diff changeset
1225 * (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
1226 * overflow in the calculation of exp and top_exp below.
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diff changeset
1227 *
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diff changeset
1228 * More specifically, ndigits is assumed to satisfy the following
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diff changeset
1229 * inequalities:
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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diff changeset
1230 *
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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diff changeset
1231 * 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
1232 * 4*ndigits <= LONG_MAX/2 + 1 - DBL_MAX_EXP
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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diff changeset
1233 *
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diff changeset
1234 * If either of these inequalities is not satisfied, a ValueError is
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diff changeset
1235 * raised. Otherwise, write x for the value of the hex string, and
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diff changeset
1236 * assume x is nonzero. Then
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diff changeset
1237 *
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diff changeset
1238 * 2**(exp-4*ndigits) <= |x| < 2**(exp+4*ndigits).
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diff changeset
1239 *
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diff changeset
1240 * Now if exp > LONG_MAX/2 then:
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diff changeset
1241 *
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diff changeset
1242 * exp - 4*ndigits >= LONG_MAX/2 + 1 - (LONG_MAX/2 + 1 - DBL_MAX_EXP)
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diff changeset
1243 * = DBL_MAX_EXP
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diff changeset
1244 *
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diff changeset
1245 * so |x| >= 2**DBL_MAX_EXP, which is too large to be stored in C
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diff changeset
1246 * double, so overflows. If exp < LONG_MIN/2, then
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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diff changeset
1247 *
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diff changeset
1248 * exp + 4*ndigits <= LONG_MIN/2 - 1 + (
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diff changeset
1249 * DBL_MIN_EXP - DBL_MANT_DIG - LONG_MIN/2)
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diff changeset
1250 * = DBL_MIN_EXP - DBL_MANT_DIG - 1
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diff changeset
1251 *
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diff changeset
1252 * and so |x| < 2**(DBL_MIN_EXP-DBL_MANT_DIG-1), hence underflows to 0
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diff changeset
1253 * when converted to a C double.
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diff changeset
1254 *
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diff changeset
1255 * 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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1256 * exp+4*ndigits and exp-4*ndigits are within the range of a long.
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diff changeset
1257 */
48497
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diff changeset
1258
61467
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1259 s = _PyUnicode_AsStringAndSize(arg, &length);
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diff changeset
1260 if (s == NULL)
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diff changeset
1261 return NULL;
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diff changeset
1262 s_end = s + length;
48497
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diff changeset
1263
61467
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diff changeset
1264 /********************
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diff changeset
1265 * Parse the string *
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diff changeset
1266 ********************/
48497
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diff changeset
1267
61467
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diff changeset
1268 /* leading whitespace */
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diff changeset
1269 while (Py_ISSPACE(*s))
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diff changeset
1270 s++;
48497
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diff changeset
1271
61467
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diff changeset
1272 /* infinities and nans */
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diff changeset
1273 x = _Py_parse_inf_or_nan(s, &coeff_end);
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diff changeset
1274 if (coeff_end != s) {
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diff changeset
1275 s = coeff_end;
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diff changeset
1276 goto finished;
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diff changeset
1277 }
54232
4501b638fc3f Refactor to remove duplicated nan/inf parsing code in
Mark Dickinson <dickinsm@gmail.com>
parents: 54001
diff changeset
1278
61467
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diff changeset
1279 /* optional sign */
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diff changeset
1280 if (*s == '-') {
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diff changeset
1281 s++;
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diff changeset
1282 negate = 1;
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diff changeset
1283 }
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diff changeset
1284 else if (*s == '+')
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diff changeset
1285 s++;
48497
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diff changeset
1286
61467
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diff changeset
1287 /* [0x] */
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diff changeset
1288 s_store = s;
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diff changeset
1289 if (*s == '0') {
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diff changeset
1290 s++;
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diff changeset
1291 if (*s == 'x' || *s == 'X')
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diff changeset
1292 s++;
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diff changeset
1293 else
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diff changeset
1294 s = s_store;
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diff changeset
1295 }
48497
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diff changeset
1296
61467
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diff changeset
1297 /* coefficient: <integer> [. <fraction>] */
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diff changeset
1298 coeff_start = s;
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diff changeset
1299 while (hex_from_char(*s) >= 0)
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diff changeset
1300 s++;
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1301 s_store = s;
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diff changeset
1302 if (*s == '.') {
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diff changeset
1303 s++;
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diff changeset
1304 while (hex_from_char(*s) >= 0)
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diff changeset
1305 s++;
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diff changeset
1306 coeff_end = s-1;
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diff changeset
1307 }
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diff changeset
1308 else
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diff changeset
1309 coeff_end = s;
48497
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diff changeset
1310
61467
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diff changeset
1311 /* ndigits = total # of hex digits; fdigits = # after point */
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diff changeset
1312 ndigits = coeff_end - coeff_start;
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diff changeset
1313 fdigits = coeff_end - s_store;
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diff changeset
1314 if (ndigits == 0)
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diff changeset
1315 goto parse_error;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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diff changeset
1316 if (ndigits > MIN(DBL_MIN_EXP - DBL_MANT_DIG - LONG_MIN/2,
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diff changeset
1317 LONG_MAX/2 + 1 - DBL_MAX_EXP)/4)
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diff changeset
1318 goto insane_length_error;
48497
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diff changeset
1319
61467
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diff changeset
1320 /* [p <exponent>] */
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1321 if (*s == 'p' || *s == 'P') {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1322 s++;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1323 exp_start = s;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1324 if (*s == '-' || *s == '+')
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 if (!('0' <= *s && *s <= '9'))
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1327 goto parse_error;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1328 s++;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1329 while ('0' <= *s && *s <= '9')
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1330 s++;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1331 exp = strtol(exp_start, NULL, 10);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1332 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1333 else
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1334 exp = 0;
48497
2bb866d282ba Merged revisions 64974 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
parents: 48364
diff changeset
1335
2bb866d282ba Merged revisions 64974 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
parents: 48364
diff changeset
1336 /* 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
1337 #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
1338 coeff_end-(j) : \
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1339 coeff_end-1-(j)))
48497
2bb866d282ba Merged revisions 64974 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
parents: 48364
diff changeset
1340
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1341 /*******************************************
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1342 * 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
1343 *******************************************/
48497
2bb866d282ba Merged revisions 64974 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
parents: 48364
diff changeset
1344
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1345 /* 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
1346 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
1347 ndigits--;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1348 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
1349 x = 0.0;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1350 goto finished;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1351 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1352 if (exp > LONG_MAX/2)
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1353 goto overflow_error;
48497
2bb866d282ba Merged revisions 64974 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
parents: 48364
diff changeset
1354
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1355 /* Adjust exponent for fractional part. */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1356 exp = exp - 4*((long)fdigits);
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 /* 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
1359 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
1360 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
1361 top_exp++;
48497
2bb866d282ba Merged revisions 64974 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
parents: 48364
diff changeset
1362
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1363 /* 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
1364 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
1365 x = 0.0;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1366 goto finished;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1367 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1368 if (top_exp > DBL_MAX_EXP)
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1369 goto overflow_error;
48497
2bb866d282ba Merged revisions 64974 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
parents: 48364
diff changeset
1370
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1371 /* 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
1372 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
1373 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
1374
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1375 x = 0.0;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1376 if (exp >= lsb) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1377 /* no rounding required */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1378 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
1379 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
1380 x = ldexp(x, (int)(exp));
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1381 goto finished;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1382 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1383 /* 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
1384 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
1385 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
1386 key_digit = (lsb - exp - 1) / 4;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1387 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
1388 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
1389 digit = HEX_DIGIT(key_digit);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1390 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
1391
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1392 /* 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
1393 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
1394 if ((digit & half_eps) != 0) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1395 round_up = 0;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1396 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
1397 (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
1398 round_up = 1;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1399 else
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1400 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
1401 if (HEX_DIGIT(i) != 0) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1402 round_up = 1;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1403 break;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1404 }
62834
202f31d40389 Style nit.
Mark Dickinson <dickinsm@gmail.com>
parents: 62690
diff changeset
1405 if (round_up) {
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1406 x += 2*half_eps;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1407 if (top_exp == DBL_MAX_EXP &&
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1408 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
1409 /* overflow corner case: pre-rounded value <
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1410 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
1411 goto overflow_error;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1412 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1413 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1414 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
1415
2bb866d282ba Merged revisions 64974 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
parents: 48364
diff changeset
1416 finished:
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1417 /* 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
1418 while (Py_ISSPACE(*s))
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1419 s++;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1420 if (s != s_end)
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1421 goto parse_error;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1422 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
1423 if (result_as_float == NULL)
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1424 return NULL;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1425 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
1426 Py_DECREF(result_as_float);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1427 return result;
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 overflow_error:
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1430 PyErr_SetString(PyExc_OverflowError,
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1431 "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
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 parse_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 "invalid hexadecimal floating-point string");
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 insane_length_error:
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1440 PyErr_SetString(PyExc_ValueError,
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1441 "hexadecimal string too long to convert");
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1442 return NULL;
48497
2bb866d282ba Merged revisions 64974 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
parents: 48364
diff changeset
1443 }
2bb866d282ba Merged revisions 64974 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
parents: 48364
diff changeset
1444
2bb866d282ba Merged revisions 64974 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
parents: 48364
diff changeset
1445 PyDoc_STRVAR(float_fromhex_doc,
2bb866d282ba Merged revisions 64974 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
parents: 48364
diff changeset
1446 "float.fromhex(string) -> float\n\
2bb866d282ba Merged revisions 64974 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
parents: 48364
diff changeset
1447 \n\
2bb866d282ba Merged revisions 64974 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
parents: 48364
diff changeset
1448 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
1449 >>> float.fromhex('0x1.ffffp10')\n\
2bb866d282ba Merged revisions 64974 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
parents: 48364
diff changeset
1450 2047.984375\n\
2bb866d282ba Merged revisions 64974 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
parents: 48364
diff changeset
1451 >>> float.fromhex('-0x1p-1074')\n\
2bb866d282ba Merged revisions 64974 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
parents: 48364
diff changeset
1452 -4.9406564584124654e-324");
2bb866d282ba Merged revisions 64974 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
parents: 48364
diff changeset
1453
2bb866d282ba Merged revisions 64974 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
parents: 48364
diff changeset
1454
45026
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Christian Heimes <christian@cheimes.de>
parents: 44943
diff changeset
1455 static PyObject *
45134
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Christian Heimes <christian@cheimes.de>
parents: 45071
diff changeset
1456 float_as_integer_ratio(PyObject *v, PyObject *unused)
45026
ebfbaa1051e2 Merged revisions 60364-60378 via svnmerge from
Christian Heimes <christian@cheimes.de>
parents: 44943
diff changeset
1457 {
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1458 double self;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1459 double float_part;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1460 int exponent;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1461 int i;
45134
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Christian Heimes <christian@cheimes.de>
parents: 45071
diff changeset
1462
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1463 PyObject *prev;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1464 PyObject *py_exponent = NULL;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1465 PyObject *numerator = NULL;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1466 PyObject *denominator = NULL;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1467 PyObject *result_pair = NULL;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1468 PyNumberMethods *long_methods = PyLong_Type.tp_as_number;
45026
ebfbaa1051e2 Merged revisions 60364-60378 via svnmerge from
Christian Heimes <christian@cheimes.de>
parents: 44943
diff changeset
1469
ebfbaa1051e2 Merged revisions 60364-60378 via svnmerge from
Christian Heimes <christian@cheimes.de>
parents: 44943
diff changeset
1470 #define INPLACE_UPDATE(obj, call) \
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1471 prev = obj; \
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1472 obj = call; \
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1473 Py_DECREF(prev); \
45026
ebfbaa1051e2 Merged revisions 60364-60378 via svnmerge from
Christian Heimes <christian@cheimes.de>
parents: 44943
diff changeset
1474
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1475 CONVERT_TO_DOUBLE(v, self);
45026
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Christian Heimes <christian@cheimes.de>
parents: 44943
diff changeset
1476
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1477 if (Py_IS_INFINITY(self)) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1478 PyErr_SetString(PyExc_OverflowError,
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1479 "Cannot pass infinity to float.as_integer_ratio.");
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1480 return NULL;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1481 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1482 if (Py_IS_NAN(self)) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1483 PyErr_SetString(PyExc_ValueError,
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1484 "Cannot pass NaN to float.as_integer_ratio.");
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1485 return NULL;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1486 }
45026
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Christian Heimes <christian@cheimes.de>
parents: 44943
diff changeset
1487
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1488 PyFPE_START_PROTECT("as_integer_ratio", goto error);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1489 float_part = frexp(self, &exponent); /* self == float_part * 2**exponent exactly */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1490 PyFPE_END_PROTECT(float_part);
45026
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Christian Heimes <christian@cheimes.de>
parents: 44943
diff changeset
1491
61467
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1492 for (i=0; i<300 && float_part != floor(float_part) ; i++) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1493 float_part *= 2.0;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1494 exponent--;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1495 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1496 /* self == float_part * 2**exponent exactly and float_part is integral.
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1497 If FLT_RADIX != 2, the 300 steps may leave a tiny fractional part
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1498 to be truncated by PyLong_FromDouble(). */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1499
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1500 numerator = PyLong_FromDouble(float_part);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1501 if (numerator == NULL) goto error;
45026
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Christian Heimes <christian@cheimes.de>
parents: 44943
diff changeset
1502
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1503 /* fold in 2**exponent */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1504 denominator = PyLong_FromLong(1);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1505 py_exponent = PyLong_FromLong(labs((long)exponent));
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1506 if (py_exponent == NULL) goto error;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1507 INPLACE_UPDATE(py_exponent,
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1508 long_methods->nb_lshift(denominator, py_exponent));
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1509 if (py_exponent == NULL) goto error;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1510 if (exponent > 0) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1511 INPLACE_UPDATE(numerator,
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1512 long_methods->nb_multiply(numerator, py_exponent));
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1513 if (numerator == NULL) goto error;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1514 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1515 else {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1516 Py_DECREF(denominator);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1517 denominator = py_exponent;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1518 py_exponent = NULL;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1519 }
45026
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Christian Heimes <christian@cheimes.de>
parents: 44943
diff changeset
1520
61467
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1521 result_pair = PyTuple_Pack(2, numerator, denominator);
45026
ebfbaa1051e2 Merged revisions 60364-60378 via svnmerge from
Christian Heimes <christian@cheimes.de>
parents: 44943
diff changeset
1522
ebfbaa1051e2 Merged revisions 60364-60378 via svnmerge from
Christian Heimes <christian@cheimes.de>
parents: 44943
diff changeset
1523 #undef INPLACE_UPDATE
ebfbaa1051e2 Merged revisions 60364-60378 via svnmerge from
Christian Heimes <christian@cheimes.de>
parents: 44943
diff changeset
1524 error:
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1525 Py_XDECREF(py_exponent);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1526 Py_XDECREF(denominator);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1527 Py_XDECREF(numerator);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1528 return result_pair;
45026
ebfbaa1051e2 Merged revisions 60364-60378 via svnmerge from
Christian Heimes <christian@cheimes.de>
parents: 44943
diff changeset
1529 }
ebfbaa1051e2 Merged revisions 60364-60378 via svnmerge from
Christian Heimes <christian@cheimes.de>
parents: 44943
diff changeset
1530
ebfbaa1051e2 Merged revisions 60364-60378 via svnmerge from
Christian Heimes <christian@cheimes.de>
parents: 44943
diff changeset
1531 PyDoc_STRVAR(float_as_integer_ratio_doc,
ebfbaa1051e2 Merged revisions 60364-60378 via svnmerge from
Christian Heimes <christian@cheimes.de>
parents: 44943
diff changeset
1532 "float.as_integer_ratio() -> (int, int)\n"
ebfbaa1051e2 Merged revisions 60364-60378 via svnmerge from
Christian Heimes <christian@cheimes.de>
parents: 44943
diff changeset
1533 "\n"
45134
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Christian Heimes <christian@cheimes.de>
parents: 45071
diff changeset
1534 "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
1535 "float and with a positive denominator.\n"
49493
bdf4da5d04ad merge from trunk
Benjamin Peterson <benjamin@python.org>
parents: 49270
diff changeset
1536 "Raises OverflowError on infinities and a ValueError on NaNs.\n"
45026
ebfbaa1051e2 Merged revisions 60364-60378 via svnmerge from
Christian Heimes <christian@cheimes.de>
parents: 44943
diff changeset
1537 "\n"
ebfbaa1051e2 Merged revisions 60364-60378 via svnmerge from
Christian Heimes <christian@cheimes.de>
parents: 44943
diff changeset
1538 ">>> (10.0).as_integer_ratio()\n"
45134
bdcf40d1b38e Merged revisions 60481,60485,60489-60520,60523-60527,60530-60533,60535-60538,60540-60551 via svnmerge from
Christian Heimes <christian@cheimes.de>
parents: 45071
diff changeset
1539 "(10, 1)\n"
45026
ebfbaa1051e2 Merged revisions 60364-60378 via svnmerge from
Christian Heimes <christian@cheimes.de>
parents: 44943
diff changeset
1540 ">>> (0.0).as_integer_ratio()\n"
ebfbaa1051e2 Merged revisions 60364-60378 via svnmerge from
Christian Heimes <christian@cheimes.de>
parents: 44943
diff changeset
1541 "(0, 1)\n"
ebfbaa1051e2 Merged revisions 60364-60378 via svnmerge from
Christian Heimes <christian@cheimes.de>
parents: 44943
diff changeset
1542 ">>> (-.25).as_integer_ratio()\n"
45134
bdcf40d1b38e Merged revisions 60481,60485,60489-60520,60523-60527,60530-60533,60535-60538,60540-60551 via svnmerge from
Christian Heimes <christian@cheimes.de>
parents: 45071
diff changeset
1543 "(-1, 4)");
45026
ebfbaa1051e2 Merged revisions 60364-60378 via svnmerge from
Christian Heimes <christian@cheimes.de>
parents: 44943
diff changeset
1544
1049
2ed511171809 Made builtins int(), long(), float(), oct() and hex() more generic.
Guido van Rossum <guido@python.org>
parents: 955
diff changeset
1545
24280
1598a1e473e2 staticforward bites the dust.
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 23832
diff changeset
1546 static PyObject *
19552
6c30d20d27f2 Make int, long and float subclassable.
Guido van Rossum <guido@python.org>
parents: 19457
diff changeset
1547 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
1548
18933
09df3254b49d Merge of descr-branch back into trunk.
Tim Peters <tim.peters@gmail.com>
parents: 18838
diff changeset
1549 static PyObject *
09df3254b49d Merge of descr-branch back into trunk.
Tim Peters <tim.peters@gmail.com>
parents: 18838
diff changeset
1550 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
1551 {
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1552 PyObject *x = Py_False; /* Integer zero */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1553 static char *kwlist[] = {"x", 0};
18933
09df3254b49d Merge of descr-branch back into trunk.
Tim Peters <tim.peters@gmail.com>
parents: 18838
diff changeset
1554
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1555 if (type != &PyFloat_Type)
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1556 return float_subtype_new(type, args, kwds); /* Wimp out */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1557 if (!PyArg_ParseTupleAndKeywords(args, kwds, "|O:float", kwlist, &x))
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1558 return NULL;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1559 /* If it's a string, but not a string subclass, use
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1560 PyFloat_FromString. */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1561 if (PyUnicode_CheckExact(x))
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1562 return PyFloat_FromString(x);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1563 return PyNumber_Float(x);
18933
09df3254b49d Merge of descr-branch back into trunk.
Tim Peters <tim.peters@gmail.com>
parents: 18838
diff changeset
1564 }
09df3254b49d Merge of descr-branch back into trunk.
Tim Peters <tim.peters@gmail.com>
parents: 18838
diff changeset
1565
19552
6c30d20d27f2 Make int, long and float subclassable.
Guido van Rossum <guido@python.org>
parents: 19457
diff changeset
1566 /* 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
1567 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
1568 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
1569 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
1570 */
6c30d20d27f2 Make int, long and float subclassable.
Guido van Rossum <guido@python.org>
parents: 19457
diff changeset
1571 static PyObject *
6c30d20d27f2 Make int, long and float subclassable.
Guido van Rossum <guido@python.org>
parents: 19457
diff changeset
1572 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
1573 {
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1574 PyObject *tmp, *newobj;
19552
6c30d20d27f2 Make int, long and float subclassable.
Guido van Rossum <guido@python.org>
parents: 19457
diff changeset
1575
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1576 assert(PyType_IsSubtype(type, &PyFloat_Type));
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1577 tmp = float_new(&PyFloat_Type, args, kwds);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1578 if (tmp == NULL)
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 assert(PyFloat_CheckExact(tmp));
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1581 newobj = type->tp_alloc(type, 0);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1582 if (newobj == NULL) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1583 Py_DECREF(tmp);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1584 return NULL;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1585 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1586 ((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
1587 Py_DECREF(tmp);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1588 return newobj;
19552
6c30d20d27f2 Make int, long and float subclassable.
Guido van Rossum <guido@python.org>
parents: 19457
diff changeset
1589 }
6c30d20d27f2 Make int, long and float subclassable.
Guido van Rossum <guido@python.org>
parents: 19457
diff changeset
1590
27521
17bfd5dbc0f1 Implement appropriate __getnewargs__ for all immutable subclassable builtin
Guido van Rossum <guido@python.org>
parents: 27484
diff changeset
1591 static PyObject *
17bfd5dbc0f1 Implement appropriate __getnewargs__ for all immutable subclassable builtin
Guido van Rossum <guido@python.org>
parents: 27484
diff changeset
1592 float_getnewargs(PyFloatObject *v)
17bfd5dbc0f1 Implement appropriate __getnewargs__ for all immutable subclassable builtin
Guido van Rossum <guido@python.org>
parents: 27484
diff changeset
1593 {
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1594 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
1595 }
17bfd5dbc0f1 Implement appropriate __getnewargs__ for all immutable subclassable builtin
Guido van Rossum <guido@python.org>
parents: 27484
diff changeset
1596
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1597 /* 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
1598
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1599 typedef enum {
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1600 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
1601 } float_format_type;
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1602
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1603 static float_format_type double_format, float_format;
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1604 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
1605
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1606 static PyObject *
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1607 float_getformat(PyTypeObject *v, PyObject* arg)
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1608 {
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1609 char* s;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1610 float_format_type r;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1611
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1612 if (!PyUnicode_Check(arg)) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1613 PyErr_Format(PyExc_TypeError,
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1614 "__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
1615 Py_TYPE(arg)->tp_name);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1616 return NULL;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1617 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1618 s = _PyUnicode_AsString(arg);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1619 if (s == NULL)
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1620 return NULL;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1621 if (strcmp(s, "double") == 0) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1622 r = double_format;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1623 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1624 else if (strcmp(s, "float") == 0) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1625 r = float_format;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1626 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1627 else {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1628 PyErr_SetString(PyExc_ValueError,
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1629 "__getformat__() argument 1 must be "
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1630 "'double' or 'float'");
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1631 return NULL;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1632 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1633
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1634 switch (r) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1635 case unknown_format:
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1636 return PyUnicode_FromString("unknown");
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1637 case ieee_little_endian_format:
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1638 return PyUnicode_FromString("IEEE, little-endian");
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1639 case ieee_big_endian_format:
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1640 return PyUnicode_FromString("IEEE, big-endian");
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1641 default:
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1642 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
1643 return NULL;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1644 }
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1645 }
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1646
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1647 PyDoc_STRVAR(float_getformat_doc,
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1648 "float.__getformat__(typestr) -> string\n"
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1649 "\n"
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1650 "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
1651 "used in Python's test suite.\n"
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1652 "\n"
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1653 "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
1654 "'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
1655 "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
1656
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1657 static PyObject *
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1658 float_setformat(PyTypeObject *v, PyObject* args)
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1659 {
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1660 char* typestr;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1661 char* format;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1662 float_format_type f;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1663 float_format_type detected;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1664 float_format_type *p;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1665
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1666 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
1667 return NULL;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1668
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1669 if (strcmp(typestr, "double") == 0) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1670 p = &double_format;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1671 detected = detected_double_format;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1672 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1673 else if (strcmp(typestr, "float") == 0) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1674 p = &float_format;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1675 detected = detected_float_format;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1676 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1677 else {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1678 PyErr_SetString(PyExc_ValueError,
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1679 "__setformat__() argument 1 must "
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1680 "be 'double' or 'float'");
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1681 return NULL;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1682 }
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1683
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1684 if (strcmp(format, "unknown") == 0) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1685 f = unknown_format;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1686 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1687 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
1688 f = ieee_little_endian_format;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1689 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1690 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
1691 f = ieee_big_endian_format;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1692 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1693 else {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1694 PyErr_SetString(PyExc_ValueError,
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1695 "__setformat__() argument 2 must be "
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1696 "'unknown', 'IEEE, little-endian' or "
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1697 "'IEEE, big-endian'");
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1698 return NULL;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1699
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1700 }
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1701
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1702 if (f != unknown_format && f != detected) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1703 PyErr_Format(PyExc_ValueError,
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1704 "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
1705 "detected platform value", typestr);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1706 return NULL;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1707 }
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1708
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1709 *p = f;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1710 Py_RETURN_NONE;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1711 }
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1712
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1713 PyDoc_STRVAR(float_setformat_doc,
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1714 "float.__setformat__(typestr, fmt) -> None\n"
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1715 "\n"
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1716 "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
1717 "used in Python's test suite.\n"
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1718 "\n"
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1719 "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
1720 "'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
1721 "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
1722 "\n"
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1723 "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
1724 "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
1725
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
1726 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
1727 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
1728 {
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1729 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
1730 }
d3a5c796c8ba Changes to long and float by Jeffrey Jasskin to conform to PEP 3141.
Guido van Rossum <guido@python.org>
parents: 42334
diff changeset
1731
42817
5355337709e1 Implementation of PEP 3101, Advanced String Formatting.
Eric Smith <eric@trueblade.com>
parents: 42753
diff changeset
1732 static PyObject *
5355337709e1 Implementation of PEP 3101, Advanced String Formatting.
Eric Smith <eric@trueblade.com>
parents: 42753
diff changeset
1733 float__format__(PyObject *self, PyObject *args)
5355337709e1 Implementation of PEP 3101, Advanced String Formatting.
Eric Smith <eric@trueblade.com>
parents: 42753
diff changeset
1734 {
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1735 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
1736
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1737 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
1738 return NULL;
72475
8beaa9a37387 Implement PEP 393.
Martin v. Löwis <martin@v.loewis.de>
parents: 71810
diff changeset
1739 return _PyFloat_FormatAdvanced(self, format_spec, 0,
8beaa9a37387 Implement PEP 393.
Martin v. Löwis <martin@v.loewis.de>
parents: 71810
diff changeset
1740 PyUnicode_GET_LENGTH(format_spec));
42817
5355337709e1 Implementation of PEP 3101, Advanced String Formatting.
Eric Smith <eric@trueblade.com>
parents: 42753
diff changeset
1741 }
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 PyDoc_STRVAR(float__format__doc,
5355337709e1 Implementation of PEP 3101, Advanced String Formatting.
Eric Smith <eric@trueblade.com>
parents: 42753
diff changeset
1744 "float.__format__(format_spec) -> string\n"
5355337709e1 Implementation of PEP 3101, Advanced String Formatting.
Eric Smith <eric@trueblade.com>
parents: 42753
diff changeset
1745 "\n"
5355337709e1 Implementation of PEP 3101, Advanced String Formatting.
Eric Smith <eric@trueblade.com>
parents: 42753
diff changeset
1746 "Formats the float according to format_spec.");
5355337709e1 Implementation of PEP 3101, Advanced String Formatting.
Eric Smith <eric@trueblade.com>
parents: 42753
diff changeset
1747
5355337709e1 Implementation of PEP 3101, Advanced String Formatting.
Eric Smith <eric@trueblade.com>
parents: 42753
diff changeset
1748
27521
17bfd5dbc0f1 Implement appropriate __getnewargs__ for all immutable subclassable builtin
Guido van Rossum <guido@python.org>
parents: 27484
diff changeset
1749 static PyMethodDef float_methods[] = {
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1750 {"conjugate", (PyCFunction)float_float, METH_NOARGS,
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1751 "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
1752 {"__trunc__", (PyCFunction)float_trunc, METH_NOARGS,
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1753 "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
1754 {"__round__", (PyCFunction)float_round, METH_VARARGS,
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1755 "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
1756 "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
1757 {"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
1758 float_as_integer_ratio_doc},
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1759 {"fromhex", (PyCFunction)float_fromhex,
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1760 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
1761 {"hex", (PyCFunction)float_hex,
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1762 METH_NOARGS, float_hex_doc},
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1763 {"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
1764 "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
1765 #if 0
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1766 {"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
1767 "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
1768 {"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
1769 "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
1770 {"is_nan", (PyCFunction)float_is_nan, METH_NOARGS,
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1771 "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
1772 #endif
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1773 {"__getnewargs__", (PyCFunction)float_getnewargs, METH_NOARGS},
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1774 {"__getformat__", (PyCFunction)float_getformat,
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1775 METH_O|METH_CLASS, float_getformat_doc},
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1776 {"__setformat__", (PyCFunction)float_setformat,
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1777 METH_VARARGS|METH_CLASS, float_setformat_doc},
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1778 {"__format__", (PyCFunction)float__format__,
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1779 METH_VARARGS, float__format__doc},
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1780 {NULL, NULL} /* sentinel */
27521
17bfd5dbc0f1 Implement appropriate __getnewargs__ for all immutable subclassable builtin
Guido van Rossum <guido@python.org>
parents: 27484
diff changeset
1781 };
17bfd5dbc0f1 Implement appropriate __getnewargs__ for all immutable subclassable builtin
Guido van Rossum <guido@python.org>
parents: 27484
diff changeset
1782
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
1783 static PyGetSetDef float_getset[] = {
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1784 {"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
1785 (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
1786 "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
1787 NULL},
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1788 {"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
1789 (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
1790 "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
1791 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
1792 {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
1793 };
d3a5c796c8ba Changes to long and float by Jeffrey Jasskin to conform to PEP 3141.
Guido van Rossum <guido@python.org>
parents: 42334
diff changeset
1794
23832
ed1ba37a46b7 Patch #568124: Add doc string macros.
Martin v. Löwis <martin@v.loewis.de>
parents: 23344
diff changeset
1795 PyDoc_STRVAR(float_doc,
18933
09df3254b49d Merge of descr-branch back into trunk.
Tim Peters <tim.peters@gmail.com>
parents: 18838
diff changeset
1796 "float(x) -> floating point number\n\
09df3254b49d Merge of descr-branch back into trunk.
Tim Peters <tim.peters@gmail.com>
parents: 18838
diff changeset
1797 \n\
23832
ed1ba37a46b7 Patch #568124: Add doc string macros.
Martin v. Löwis <martin@v.loewis.de>
parents: 23344
diff changeset
1798 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
1799
09df3254b49d Merge of descr-branch back into trunk.
Tim Peters <tim.peters@gmail.com>
parents: 18838
diff changeset
1800
5396
d1447950fa04 Quickly renamed the last directory.
Guido van Rossum <guido@python.org>
parents: 5197
diff changeset
1801 static PyNumberMethods float_as_number = {
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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parents: 54232
diff changeset
1802 float_add, /*nb_add*/
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1803 float_sub, /*nb_subtract*/
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1804 float_mul, /*nb_multiply*/
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1805 float_rem, /*nb_remainder*/
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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parents: 54232
diff changeset
1806 float_divmod, /*nb_divmod*/
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1807 float_pow, /*nb_power*/
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1808 (unaryfunc)float_neg, /*nb_negative*/
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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parents: 54232
diff changeset
1809 (unaryfunc)float_float, /*nb_positive*/
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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parents: 54232
diff changeset
1810 (unaryfunc)float_abs, /*nb_absolute*/
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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parents: 54232
diff changeset
1811 (inquiry)float_bool, /*nb_bool*/
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1812 0, /*nb_invert*/
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1813 0, /*nb_lshift*/
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1814 0, /*nb_rshift*/
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1815 0, /*nb_and*/
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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parents: 54232
diff changeset
1816 0, /*nb_xor*/
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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parents: 54232
diff changeset
1817 0, /*nb_or*/
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1818 float_trunc, /*nb_int*/
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1819 0, /*nb_reserved*/
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1820 float_float, /*nb_float*/
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1821 0, /* nb_inplace_add */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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parents: 54232
diff changeset
1822 0, /* nb_inplace_subtract */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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parents: 54232
diff changeset
1823 0, /* nb_inplace_multiply */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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parents: 54232
diff changeset
1824 0, /* nb_inplace_remainder */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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parents: 54232
diff changeset
1825 0, /* nb_inplace_power */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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parents: 54232
diff changeset
1826 0, /* nb_inplace_lshift */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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parents: 54232
diff changeset
1827 0, /* nb_inplace_rshift */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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parents: 54232
diff changeset
1828 0, /* nb_inplace_and */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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parents: 54232
diff changeset
1829 0, /* nb_inplace_xor */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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parents: 54232
diff changeset
1830 0, /* nb_inplace_or */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1831 float_floor_div, /* nb_floor_divide */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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parents: 54232
diff changeset
1832 float_div, /* nb_true_divide */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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parents: 54232
diff changeset
1833 0, /* nb_inplace_floor_divide */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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parents: 54232
diff changeset
1834 0, /* nb_inplace_true_divide */
6
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
1835 };
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
1836
5396
d1447950fa04 Quickly renamed the last directory.
Guido van Rossum <guido@python.org>
parents: 5197
diff changeset
1837 PyTypeObject PyFloat_Type = {
61467
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diff changeset
1838 PyVarObject_HEAD_INIT(&PyType_Type, 0)
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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parents: 54232
diff changeset
1839 "float",
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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parents: 54232
diff changeset
1840 sizeof(PyFloatObject),
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diff changeset
1841 0,
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diff changeset
1842 (destructor)float_dealloc, /* tp_dealloc */
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diff changeset
1843 0, /* tp_print */
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diff changeset
1844 0, /* tp_getattr */
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diff changeset
1845 0, /* tp_setattr */
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diff changeset
1846 0, /* tp_reserved */
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parents: 54232
diff changeset
1847 (reprfunc)float_repr, /* tp_repr */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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parents: 54232
diff changeset
1848 &float_as_number, /* tp_as_number */
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parents: 54232
diff changeset
1849 0, /* tp_as_sequence */
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diff changeset
1850 0, /* tp_as_mapping */
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diff changeset
1851 (hashfunc)float_hash, /* tp_hash */
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1852 0, /* tp_call */
63750
eafe07d40eb7 Issue #9337: Make float.__str__ identical to float.__repr__.
Mark Dickinson <dickinsm@gmail.com>
parents: 62834
diff changeset
1853 (reprfunc)float_repr, /* tp_str */
61467
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diff changeset
1854 PyObject_GenericGetAttr, /* tp_getattro */
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parents: 54232
diff changeset
1855 0, /* tp_setattro */
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parents: 54232
diff changeset
1856 0, /* tp_as_buffer */
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parents: 54232
diff changeset
1857 Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE, /* tp_flags */
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diff changeset
1858 float_doc, /* tp_doc */
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diff changeset
1859 0, /* tp_traverse */
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diff changeset
1860 0, /* tp_clear */
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parents: 54232
diff changeset
1861 float_richcompare, /* tp_richcompare */
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parents: 54232
diff changeset
1862 0, /* tp_weaklistoffset */
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diff changeset
1863 0, /* tp_iter */
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diff changeset
1864 0, /* tp_iternext */
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parents: 54232
diff changeset
1865 float_methods, /* tp_methods */
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diff changeset
1866 0, /* tp_members */
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diff changeset
1867 float_getset, /* tp_getset */
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diff changeset
1868 0, /* tp_base */
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diff changeset
1869 0, /* tp_dict */
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diff changeset
1870 0, /* tp_descr_get */
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diff changeset
1871 0, /* tp_descr_set */
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diff changeset
1872 0, /* tp_dictoffset */
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diff changeset
1873 0, /* tp_init */
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diff changeset
1874 0, /* tp_alloc */
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diff changeset
1875 float_new, /* tp_new */
6
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
1876 };
5936
80d24364b932 Added _Fini() routines to free up some memory
Guido van Rossum <guido@python.org>
parents: 5504
diff changeset
1877
80d24364b932 Added _Fini() routines to free up some memory
Guido van Rossum <guido@python.org>
parents: 5504
diff changeset
1878 void
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1879 _PyFloat_Init(void)
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1880 {
61467
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1881 /* We attempt to determine if this machine is using IEEE
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diff changeset
1882 floating point formats by peering at the bits of some
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1883 carefully chosen values. If it looks like we are on an
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1884 IEEE platform, the float packing/unpacking routines can
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1885 just copy bits, if not they resort to arithmetic & shifts
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1886 and masks. The shifts & masks approach works on all finite
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1887 values, but what happens to infinities, NaNs and signed
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1888 zeroes on packing is an accident, and attempting to unpack
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diff changeset
1889 a NaN or an infinity will raise an exception.
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1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1890
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1891 Note that if we're on some whacked-out platform which uses
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1892 IEEE formats but isn't strictly little-endian or big-
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1893 endian, we will fall back to the portable shifts & masks
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diff changeset
1894 method. */
34972
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parents: 34931
diff changeset
1895
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1896 #if SIZEOF_DOUBLE == 8
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1897 {
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1898 double x = 9006104071832581.0;
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1899 if (memcmp(&x, "\x43\x3f\xff\x01\x02\x03\x04\x05", 8) == 0)
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1900 detected_double_format = ieee_big_endian_format;
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1901 else if (memcmp(&x, "\x05\x04\x03\x02\x01\xff\x3f\x43", 8) == 0)
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1902 detected_double_format = ieee_little_endian_format;
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1903 else
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1904 detected_double_format = unknown_format;
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1905 }
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1906 #else
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1907 detected_double_format = unknown_format;
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1908 #endif
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
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1909
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1910 #if SIZEOF_FLOAT == 4
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1911 {
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1912 float y = 16711938.0;
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1913 if (memcmp(&y, "\x4b\x7f\x01\x02", 4) == 0)
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1914 detected_float_format = ieee_big_endian_format;
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1915 else if (memcmp(&y, "\x02\x01\x7f\x4b", 4) == 0)
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1916 detected_float_format = ieee_little_endian_format;
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1917 else
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1918 detected_float_format = unknown_format;
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1919 }
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1920 #else
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1921 detected_float_format = unknown_format;
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1922 #endif
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
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1923
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1924 double_format = detected_double_format;
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1925 float_format = detected_float_format;
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1926
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1927 /* Init float info */
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1928 if (FloatInfoType.tp_name == 0)
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1929 PyStructSequence_InitType(&FloatInfoType, &floatinfo_desc);
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1930 }
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1931
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1932 int
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1933 PyFloat_ClearFreeList(void)
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1934 {
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1935 PyFloatObject *p;
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1936 PyFloatBlock *list, *next;
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1937 int i;
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1938 int u; /* remaining unfreed floats per block */
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1939 int freelist_size = 0;
10382
e2a08a81e56f OK, try again. Vladimir gave me a fix for the alignment bus error,
Guido van Rossum <guido@python.org>
parents: 10375
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1940
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1941 list = block_list;
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1942 block_list = NULL;
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1943 free_list = NULL;
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1944 while (list != NULL) {
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1945 u = 0;
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1946 for (i = 0, p = &list->objects[0];
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1947 i < N_FLOATOBJECTS;
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1948 i++, p++) {
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1949 if (PyFloat_CheckExact(p) && Py_REFCNT(p) != 0)
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1950 u++;
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1951 }
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1952 next = list->next;
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1953 if (u) {
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1954 list->next = block_list;
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1955 block_list = list;
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1956 for (i = 0, p = &list->objects[0];
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1957 i < N_FLOATOBJECTS;
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1958 i++, p++) {
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1959 if (!PyFloat_CheckExact(p) ||
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1960 Py_REFCNT(p) == 0) {
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1961 Py_TYPE(p) = (struct _typeobject *)
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1962 free_list;
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1963 free_list = p;
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1964 }
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1965 }
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1966 }
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1967 else {
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1968 PyMem_FREE(list);
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1969 }
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1970 freelist_size += u;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1971 list = next;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1972 }
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diff changeset
1973 return freelist_size;
45145
3d7b84daa34a Merged revisions 60481,60485,60489-60492,60494-60496,60498-60499,60501-60503,60505-60506,60508-60509,60523-60524,60532,60543,60545,60547-60548,60552-60567 via svnmerge from
Christian Heimes <christian@cheimes.de>
parents: 45134
diff changeset
1974 }
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
1975
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
1976 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
1977 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
1978 {
61467
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Antoine Pitrou <solipsis@pitrou.net>
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diff changeset
1979 PyFloatObject *p;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1980 PyFloatBlock *list;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1981 int i;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1982 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
1983
61467
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Antoine Pitrou <solipsis@pitrou.net>
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diff changeset
1984 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
1985
61467
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Antoine Pitrou <solipsis@pitrou.net>
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diff changeset
1986 if (!Py_VerboseFlag)
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
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diff changeset
1987 return;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1988 fprintf(stderr, "# cleanup floats");
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1989 if (!u) {
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1990 fprintf(stderr, "\n");
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1991 }
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1992 else {
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1993 fprintf(stderr,
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1994 ": %d unfreed float%s\n",
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1995 u, u == 1 ? "" : "s");
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1996 }
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1997 if (Py_VerboseFlag > 1) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1998 list = block_list;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1999 while (list != NULL) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2000 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
2001 i < N_FLOATOBJECTS;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2002 i++, p++) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2003 if (PyFloat_CheckExact(p) &&
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2004 Py_REFCNT(p) != 0) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2005 char *buf = PyOS_double_to_string(
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2006 PyFloat_AS_DOUBLE(p), 'r',
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2007 0, 0, NULL);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2008 if (buf) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2009 /* XXX(twouters) cast
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2010 refcount to long
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2011 until %zd is
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2012 universally
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2013 available
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 fprintf(stderr,
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2016 "# <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
2017 p, (long)Py_REFCNT(p), buf);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2018 PyMem_Free(buf);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2019 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2020 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2021 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2022 list = list->next;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2023 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2024 }
5936
80d24364b932 Added _Fini() routines to free up some memory
Guido van Rossum <guido@python.org>
parents: 5504
diff changeset
2025 }
28335
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2026
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2027 /*----------------------------------------------------------------------------
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2028 * _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
2029 */
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2030 int
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2031 _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
2032 {
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2033 if (float_format == unknown_format) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2034 unsigned char sign;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2035 int e;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2036 double f;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2037 unsigned int fbits;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2038 int incr = 1;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2039
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2040 if (le) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2041 p += 3;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2042 incr = -1;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2043 }
28335
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2044
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2045 if (x < 0) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2046 sign = 1;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2047 x = -x;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2048 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2049 else
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2050 sign = 0;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2051
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2052 f = frexp(x, &e);
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2053
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2054 /* 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
2055 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
2056 f *= 2.0;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2057 e--;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2058 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2059 else if (f == 0.0)
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2060 e = 0;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2061 else {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2062 PyErr_SetString(PyExc_SystemError,
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2063 "frexp() result out of range");
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2064 return -1;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2065 }
28335
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2066
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2067 if (e >= 128)
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2068 goto Overflow;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2069 else if (e < -126) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2070 /* Gradual underflow */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2071 f = ldexp(f, 126 + e);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2072 e = 0;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2073 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2074 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
2075 e += 127;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2076 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
2077 }
28335
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2078
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2079 f *= 8388608.0; /* 2**23 */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2080 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
2081 assert(fbits <= 8388608);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2082 if (fbits >> 23) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2083 /* 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
2084 fbits = 0;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2085 ++e;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2086 if (e >= 255)
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2087 goto Overflow;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2088 }
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2089
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2090 /* First byte */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2091 *p = (sign << 7) | (e >> 1);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2092 p += incr;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2093
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2094 /* Second byte */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2095 *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
2096 p += incr;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2097
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2098 /* Third byte */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2099 *p = (fbits >> 8) & 0xFF;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2100 p += incr;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2101
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2102 /* Fourth byte */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2103 *p = fbits & 0xFF;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2104
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2105 /* Done */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2106 return 0;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2107
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2108 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2109 else {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2110 float y = (float)x;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2111 const char *s = (char*)&y;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2112 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
2113
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2114 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
2115 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
2116
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2117 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
2118 || (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
2119 p += 3;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2120 incr = -1;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2121 }
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
2122
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2123 for (i = 0; i < 4; i++) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2124 *p = *s++;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2125 p += incr;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2126 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2127 return 0;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2128 }
45773
832c820e9d14 Merged revisions 61239-61249,61252-61257,61260-61264,61269-61275,61278-61279,61285-61286,61288-61290,61298,61303-61305,61312-61314,61317,61329,61332,61344,61350-61351,61363-61376,61378-61379,61382-61383,61387-61388,61392,61395-61396,61402-61403 via svnmerge from
Christian Heimes <christian@cheimes.de>
parents: 45145
diff changeset
2129 Overflow:
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2130 PyErr_SetString(PyExc_OverflowError,
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2131 "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
2132 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
2133 }
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2134
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2135 int
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2136 _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
2137 {
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2138 if (double_format == unknown_format) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2139 unsigned char sign;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2140 int e;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2141 double f;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2142 unsigned int fhi, flo;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2143 int incr = 1;
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 (le) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2146 p += 7;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2147 incr = -1;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2148 }
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2149
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2150 if (x < 0) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2151 sign = 1;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2152 x = -x;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2153 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2154 else
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2155 sign = 0;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2156
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2157 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
2158
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2159 /* 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
2160 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
2161 f *= 2.0;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2162 e--;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2163 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2164 else if (f == 0.0)
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2165 e = 0;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2166 else {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2167 PyErr_SetString(PyExc_SystemError,
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2168 "frexp() result out of range");
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2169 return -1;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2170 }
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2171
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2172 if (e >= 1024)
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2173 goto Overflow;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2174 else if (e < -1022) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2175 /* Gradual underflow */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2176 f = ldexp(f, 1022 + e);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2177 e = 0;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2178 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2179 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
2180 e += 1023;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2181 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
2182 }
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2183
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2184 /* 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
2185 f *= 268435456.0; /* 2**28 */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2186 fhi = (unsigned int)f; /* Truncate */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2187 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
2188
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2189 f -= (double)fhi;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2190 f *= 16777216.0; /* 2**24 */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2191 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
2192 assert(flo <= 16777216);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2193 if (flo >> 24) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2194 /* 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
2195 flo = 0;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2196 ++fhi;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2197 if (fhi >> 28) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2198 /* 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
2199 fhi = 0;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2200 ++e;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2201 if (e >= 2047)
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2202 goto Overflow;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2203 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2204 }
28335
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2205
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2206 /* First byte */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2207 *p = (sign << 7) | (e >> 4);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2208 p += incr;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2209
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2210 /* Second byte */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2211 *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
2212 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
2213
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2214 /* Third byte */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2215 *p = (fhi >> 16) & 0xFF;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2216 p += incr;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2217
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2218 /* Fourth byte */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2219 *p = (fhi >> 8) & 0xFF;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2220 p += incr;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2221
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2222 /* Fifth byte */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2223 *p = fhi & 0xFF;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2224 p += incr;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2225
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2226 /* Sixth byte */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2227 *p = (flo >> 16) & 0xFF;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2228 p += incr;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2229
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2230 /* Seventh byte */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2231 *p = (flo >> 8) & 0xFF;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2232 p += incr;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2233
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2234 /* Eighth byte */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2235 *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
2236 /* p += incr; */
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2237
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2238 /* Done */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2239 return 0;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2240
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2241 Overflow:
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2242 PyErr_SetString(PyExc_OverflowError,
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2243 "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
2244 return -1;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2245 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2246 else {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2247 const char *s = (char*)&x;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2248 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
2249
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2250 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
2251 || (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
2252 p += 7;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2253 incr = -1;
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
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2256 for (i = 0; i < 8; i++) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2257 *p = *s++;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2258 p += incr;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2259 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2260 return 0;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2261 }
28335
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2262 }
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2263
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2264 double
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2265 _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
2266 {
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2267 if (float_format == unknown_format) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2268 unsigned char sign;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2269 int e;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2270 unsigned int f;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2271 double x;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2272 int incr = 1;
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 if (le) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2275 p += 3;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2276 incr = -1;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2277 }
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2278
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2279 /* First byte */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2280 sign = (*p >> 7) & 1;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2281 e = (*p & 0x7F) << 1;
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 /* Second byte */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2285 e |= (*p >> 7) & 1;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2286 f = (*p & 0x7F) << 16;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2287 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
2288
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2289 if (e == 255) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2290 PyErr_SetString(
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2291 PyExc_ValueError,
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2292 "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
2293 "on non-IEEE platform");
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2294 return -1;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2295 }
28335
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2296
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2297 /* Third byte */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2298 f |= *p << 8;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2299 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
2300
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2301 /* Fourth byte */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2302 f |= *p;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2303
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2304 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
2305
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2306 /* 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
2307 if (e == 0)
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2308 e = -126;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2309 else {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2310 x += 1.0;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2311 e -= 127;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2312 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2313 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
2314
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2315 if (sign)
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2316 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
2317
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2318 return x;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2319 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2320 else {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2321 float x;
35987
8eda1a58a490 Fix bug
Michael W. Hudson <mwh@python.net>
parents: 35178
diff changeset
2322
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2323 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
2324 || (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
2325 char buf[4];
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2326 char *d = &buf[3];
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2327 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
2328
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2329 for (i = 0; i < 4; i++) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2330 *d-- = *p++;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2331 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2332 memcpy(&x, buf, 4);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2333 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2334 else {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2335 memcpy(&x, p, 4);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2336 }
35987
8eda1a58a490 Fix bug
Michael W. Hudson <mwh@python.net>
parents: 35178
diff changeset
2337
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2338 return x;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2339 }
28335
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2340 }
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2341
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2342 double
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2343 _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
2344 {
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2345 if (double_format == unknown_format) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2346 unsigned char sign;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2347 int e;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2348 unsigned int fhi, flo;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2349 double x;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2350 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
2351
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2352 if (le) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2353 p += 7;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2354 incr = -1;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2355 }
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2356
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2357 /* First byte */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2358 sign = (*p >> 7) & 1;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2359 e = (*p & 0x7F) << 4;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2360
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 /* Second byte */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2364 e |= (*p >> 4) & 0xF;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2365 fhi = (*p & 0xF) << 24;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2366 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
2367
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2368 if (e == 2047) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2369 PyErr_SetString(
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2370 PyExc_ValueError,
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2371 "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
2372 "on non-IEEE platform");
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2373 return -1.0;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2374 }
28335
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2375
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2376 /* Third byte */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2377 fhi |= *p << 16;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2378 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
2379
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2380 /* Fourth byte */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2381 fhi |= *p << 8;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2382 p += incr;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2383
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2384 /* Fifth byte */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2385 fhi |= *p;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2386 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
2387
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2388 /* Sixth byte */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2389 flo = *p << 16;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2390 p += incr;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2391
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2392 /* Seventh byte */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2393 flo |= *p << 8;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2394 p += incr;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2395
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2396 /* Eighth byte */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2397 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
2398
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2399 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
2400 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
2401
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2402 if (e == 0)
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2403 e = -1022;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2404 else {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2405 x += 1.0;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2406 e -= 1023;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2407 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2408 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
2409
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2410 if (sign)
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2411 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
2412
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2413 return x;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2414 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2415 else {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2416 double x;
35987
8eda1a58a490 Fix bug
Michael W. Hudson <mwh@python.net>
parents: 35178
diff changeset
2417
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2418 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
2419 || (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
2420 char buf[8];
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2421 char *d = &buf[7];
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2422 int i;
35987
8eda1a58a490 Fix bug
Michael W. Hudson <mwh@python.net>
parents: 35178
diff changeset
2423
61467
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2424 for (i = 0; i < 8; i++) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2425 *d-- = *p++;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2426 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2427 memcpy(&x, buf, 8);
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2428 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2429 else {
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2430 memcpy(&x, p, 8);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2431 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2432
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2433 return x;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2434 }
28335
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2435 }