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annotate Objects/floatobject.c @ 87081:dc5ae99bc605

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Issue #19437: Fix GetKeepedObjects() of ctypes, handle PyCData_GetContainer() failure
author Victor Stinner <victor.stinner@gmail.com>
date Wed, 13 Nov 2013 13:24:50 +0100
parents a73c47c1d374
children 95dc3054959b
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1
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2 /* Float object implementation */
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4 /* XXX There should be overflow checks here, but it's hard to check
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5 for any kind of float exception without losing portability. */
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6
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7 #include "Python.h"
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8
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9 #include <ctype.h>
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10 #include <float.h>
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12
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13 /* Special free list
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14 free_list is a singly-linked list of available PyFloatObjects, linked
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15 via abuse of their ob_type members.
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16 */
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17
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18 #ifndef PyFloat_MAXFREELIST
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19 #define PyFloat_MAXFREELIST 100
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20 #endif
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21 static int numfree = 0;
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22 static PyFloatObject *free_list = NULL;
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23
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24 double
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25 PyFloat_GetMax(void)
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26 {
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27 return DBL_MAX;
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28 }
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29
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30 double
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31 PyFloat_GetMin(void)
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32 {
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33 return DBL_MIN;
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34 }
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35
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36 static PyTypeObject FloatInfoType;
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37
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38 PyDoc_STRVAR(floatinfo__doc__,
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39 "sys.float_info\n\
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40 \n\
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41 A structseq holding information about the float type. It contains low level\n\
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42 information about the precision and internal representation. Please study\n\
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43 your system's :file:`float.h` for more information.");
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44
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45 static PyStructSequence_Field floatinfo_fields[] = {
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46 {"max", "DBL_MAX -- maximum representable finite float"},
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47 {"max_exp", "DBL_MAX_EXP -- maximum int e such that radix**(e-1) "
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48 "is representable"},
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49 {"max_10_exp", "DBL_MAX_10_EXP -- maximum int e such that 10**e "
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50 "is representable"},
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51 {"min", "DBL_MIN -- Minimum positive normalizer float"},
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52 {"min_exp", "DBL_MIN_EXP -- minimum int e such that radix**(e-1) "
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53 "is a normalized float"},
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54 {"min_10_exp", "DBL_MIN_10_EXP -- minimum int e such that 10**e is "
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55 "a normalized"},
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56 {"dig", "DBL_DIG -- digits"},
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57 {"mant_dig", "DBL_MANT_DIG -- mantissa digits"},
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58 {"epsilon", "DBL_EPSILON -- Difference between 1 and the next "
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59 "representable float"},
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60 {"radix", "FLT_RADIX -- radix of exponent"},
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61 {"rounds", "FLT_ROUNDS -- addition rounds"},
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62 {0}
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63 };
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64
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65 static PyStructSequence_Desc floatinfo_desc = {
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66 "sys.float_info", /* name */
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67 floatinfo__doc__, /* doc */
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68 floatinfo_fields, /* fields */
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69 11
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70 };
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71
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72 PyObject *
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73 PyFloat_GetInfo(void)
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74 {
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75 PyObject* floatinfo;
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76 int pos = 0;
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78 floatinfo = PyStructSequence_New(&FloatInfoType);
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79 if (floatinfo == NULL) {
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80 return NULL;
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81 }
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82
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83 #define SetIntFlag(flag) \
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84 PyStructSequence_SET_ITEM(floatinfo, pos++, PyLong_FromLong(flag))
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85 #define SetDblFlag(flag) \
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86 PyStructSequence_SET_ITEM(floatinfo, pos++, PyFloat_FromDouble(flag))
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87
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88 SetDblFlag(DBL_MAX);
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89 SetIntFlag(DBL_MAX_EXP);
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90 SetIntFlag(DBL_MAX_10_EXP);
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91 SetDblFlag(DBL_MIN);
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92 SetIntFlag(DBL_MIN_EXP);
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93 SetIntFlag(DBL_MIN_10_EXP);
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94 SetIntFlag(DBL_DIG);
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95 SetIntFlag(DBL_MANT_DIG);
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96 SetDblFlag(DBL_EPSILON);
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97 SetIntFlag(FLT_RADIX);
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98 SetIntFlag(FLT_ROUNDS);
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99 #undef SetIntFlag
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100 #undef SetDblFlag
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101
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102 if (PyErr_Occurred()) {
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103 Py_CLEAR(floatinfo);
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104 return NULL;
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105 }
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106 return floatinfo;
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107 }
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108
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109 PyObject *
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110 PyFloat_FromDouble(double fval)
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111 {
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112 PyFloatObject *op = free_list;
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113 if (op != NULL) {
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114 free_list = (PyFloatObject *) Py_TYPE(op);
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115 numfree--;
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116 } else {
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117 op = (PyFloatObject*) PyObject_MALLOC(sizeof(PyFloatObject));
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118 if (!op)
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119 return PyErr_NoMemory();
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120 }
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121 /* Inline PyObject_New */
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122 PyObject_INIT(op, &PyFloat_Type);
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123 op->ob_fval = fval;
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124 return (PyObject *) op;
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125 }
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126
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127 PyObject *
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128 PyFloat_FromString(PyObject *v)
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129 {
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130 const char *s, *last, *end;
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131 double x;
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132 PyObject *s_buffer = NULL;
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133 Py_ssize_t len;
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134 PyObject *result = NULL;
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135
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136 if (PyUnicode_Check(v)) {
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137 s_buffer = _PyUnicode_TransformDecimalAndSpaceToASCII(v);
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138 if (s_buffer == NULL)
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139 return NULL;
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140 s = PyUnicode_AsUTF8AndSize(s_buffer, &len);
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141 if (s == NULL) {
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142 Py_DECREF(s_buffer);
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143 return NULL;
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144 }
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145 }
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146 else if (PyObject_AsCharBuffer(v, &s, &len)) {
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147 PyErr_Format(PyExc_TypeError,
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148 "float() argument must be a string or a number, not '%.200s'",
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149 Py_TYPE(v)->tp_name);
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150 return NULL;
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151 }
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152 last = s + len;
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153 /* strip space */
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154 while (s < last && Py_ISSPACE(*s))
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155 s++;
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156 while (s < last - 1 && Py_ISSPACE(last[-1]))
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157 last--;
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158 /* We don't care about overflow or underflow. If the platform
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159 * supports them, infinities and signed zeroes (on underflow) are
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160 * fine. */
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161 x = PyOS_string_to_double(s, (char **)&end, NULL);
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162 if (end != last) {
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163 PyErr_Format(PyExc_ValueError,
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164 "could not convert string to float: "
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165 "%R", v);
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166 result = NULL;
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167 }
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168 else if (x == -1.0 && PyErr_Occurred())
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169 result = NULL;
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170 else
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171 result = PyFloat_FromDouble(x);
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172
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173 Py_XDECREF(s_buffer);
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174 return result;
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175 }
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176
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177 static void
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178 float_dealloc(PyFloatObject *op)
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179 {
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180 if (PyFloat_CheckExact(op)) {
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181 if (numfree >= PyFloat_MAXFREELIST) {
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182 PyObject_FREE(op);
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183 return;
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184 }
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185 numfree++;
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186 Py_TYPE(op) = (struct _typeobject *)free_list;
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187 free_list = op;
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188 }
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189 else
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190 Py_TYPE(op)->tp_free((PyObject *)op);
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191 }
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192
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193 double
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194 PyFloat_AsDouble(PyObject *op)
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195 {
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196 PyNumberMethods *nb;
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197 PyFloatObject *fo;
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198 double val;
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199
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200 if (op && PyFloat_Check(op))
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201 return PyFloat_AS_DOUBLE((PyFloatObject*) op);
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202
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203 if (op == NULL) {
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204 PyErr_BadArgument();
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205 return -1;
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206 }
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207
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208 if ((nb = Py_TYPE(op)->tp_as_number) == NULL || nb->nb_float == NULL) {
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209 PyErr_SetString(PyExc_TypeError, "a float is required");
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210 return -1;
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211 }
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212
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213 fo = (PyFloatObject*) (*nb->nb_float) (op);
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214 if (fo == NULL)
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215 return -1;
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216 if (!PyFloat_Check(fo)) {
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217 PyErr_SetString(PyExc_TypeError,
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218 "nb_float should return float object");
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219 return -1;
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220 }
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221
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222 val = PyFloat_AS_DOUBLE(fo);
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223 Py_DECREF(fo);
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224
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225 return val;
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226 }
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227
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228 /* Macro and helper that convert PyObject obj to a C double and store
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229 the value in dbl. If conversion to double raises an exception, obj is
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230 set to NULL, and the function invoking this macro returns NULL. If
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231 obj is not of float or int type, Py_NotImplemented is incref'ed,
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232 stored in obj, and returned from the function invoking this macro.
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233 */
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234 #define CONVERT_TO_DOUBLE(obj, dbl) \
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235 if (PyFloat_Check(obj)) \
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236 dbl = PyFloat_AS_DOUBLE(obj); \
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237 else if (convert_to_double(&(obj), &(dbl)) < 0) \
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238 return obj;
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239
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240 /* Methods */
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241
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242 static int
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243 convert_to_double(PyObject **v, double *dbl)
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244 {
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245 PyObject *obj = *v;
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246
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247 if (PyLong_Check(obj)) {
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248 *dbl = PyLong_AsDouble(obj);
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249 if (*dbl == -1.0 && PyErr_Occurred()) {
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250 *v = NULL;
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251 return -1;
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252 }
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253 }
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254 else {
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255 Py_INCREF(Py_NotImplemented);
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256 *v = Py_NotImplemented;
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257 return -1;
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258 }
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259 return 0;
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260 }
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261
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262 static PyObject *
63750
eafe07d40eb7 Issue #9337: Make float.__str__ identical to float.__repr__.
Mark Dickinson <dickinsm@gmail.com>
parents: 62834
diff changeset
263 float_repr(PyFloatObject *v)
53187
b653eab13b73 The other half of Issue #1580: use short float repr where possible.
Eric Smith <eric@trueblade.com>
parents: 53160
diff changeset
264 {
b653eab13b73 The other half of Issue #1580: use short float repr where possible.
Eric Smith <eric@trueblade.com>
parents: 53160
diff changeset
265 PyObject *result;
77223
22b56b0b8619 Issue #14744: Use the new _PyUnicodeWriter internal API to speed up str%args and str.format(args)
Victor Stinner <victor.stinner@gmail.com>
parents: 75993
diff changeset
266 char *buf;
22b56b0b8619 Issue #14744: Use the new _PyUnicodeWriter internal API to speed up str%args and str.format(args)
Victor Stinner <victor.stinner@gmail.com>
parents: 75993
diff changeset
267
22b56b0b8619 Issue #14744: Use the new _PyUnicodeWriter internal API to speed up str%args and str.format(args)
Victor Stinner <victor.stinner@gmail.com>
parents: 75993
diff changeset
268 buf = PyOS_double_to_string(PyFloat_AS_DOUBLE(v),
22b56b0b8619 Issue #14744: Use the new _PyUnicodeWriter internal API to speed up str%args and str.format(args)
Victor Stinner <victor.stinner@gmail.com>
parents: 75993
diff changeset
269 'r', 0,
22b56b0b8619 Issue #14744: Use the new _PyUnicodeWriter internal API to speed up str%args and str.format(args)
Victor Stinner <victor.stinner@gmail.com>
parents: 75993
diff changeset
270 Py_DTSF_ADD_DOT_0,
22b56b0b8619 Issue #14744: Use the new _PyUnicodeWriter internal API to speed up str%args and str.format(args)
Victor Stinner <victor.stinner@gmail.com>
parents: 75993
diff changeset
271 NULL);
53187
b653eab13b73 The other half of Issue #1580: use short float repr where possible.
Eric Smith <eric@trueblade.com>
parents: 53160
diff changeset
272 if (!buf)
63750
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Mark Dickinson <dickinsm@gmail.com>
parents: 62834
diff changeset
273 return PyErr_NoMemory();
77223
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Victor Stinner <victor.stinner@gmail.com>
parents: 75993
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274 result = _PyUnicode_FromASCII(buf, strlen(buf));
53187
b653eab13b73 The other half of Issue #1580: use short float repr where possible.
Eric Smith <eric@trueblade.com>
parents: 53160
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275 PyMem_Free(buf);
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Eric Smith <eric@trueblade.com>
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diff changeset
276 return result;
b653eab13b73 The other half of Issue #1580: use short float repr where possible.
Eric Smith <eric@trueblade.com>
parents: 53160
diff changeset
277 }
11631
cf7a0f1b7b48 Implement the other easy thing: repr() of a float now uses %.17g,
Guido van Rossum <guido@python.org>
parents: 11383
diff changeset
278
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Tim Peters <tim.peters@gmail.com>
parents: 32533
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279 /* Comparison is pretty much a nightmare. When comparing float to float,
702367da2c72 SF bug #513866: Float/long comparison anomaly.
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parents: 32533
diff changeset
280 * we do it as straightforwardly (and long-windedly) as conceivable, so
702367da2c72 SF bug #513866: Float/long comparison anomaly.
Tim Peters <tim.peters@gmail.com>
parents: 32533
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281 * that, e.g., Python x == y delivers the same result as the platform
702367da2c72 SF bug #513866: Float/long comparison anomaly.
Tim Peters <tim.peters@gmail.com>
parents: 32533
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282 * C x == y when x and/or y is a NaN.
702367da2c72 SF bug #513866: Float/long comparison anomaly.
Tim Peters <tim.peters@gmail.com>
parents: 32533
diff changeset
283 * When mixing float with an integer type, there's no good *uniform* approach.
702367da2c72 SF bug #513866: Float/long comparison anomaly.
Tim Peters <tim.peters@gmail.com>
parents: 32533
diff changeset
284 * Converting the double to an integer obviously doesn't work, since we
702367da2c72 SF bug #513866: Float/long comparison anomaly.
Tim Peters <tim.peters@gmail.com>
parents: 32533
diff changeset
285 * may lose info from fractional bits. Converting the integer to a double
85418
4d62a62ba44d Issue #18783: Removed existing mentions of Python long type in docstrings,
Serhiy Storchaka <storchaka@gmail.com>
parents: 81772
diff changeset
286 * also has two failure modes: (1) an int may trigger overflow (too
33547
702367da2c72 SF bug #513866: Float/long comparison anomaly.
Tim Peters <tim.peters@gmail.com>
parents: 32533
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287 * large to fit in the dynamic range of a C double); (2) even a C long may have
81772
07488c3c85f1 Fix a few typos and a double semicolon. Patch by Eitan Adler.
Ezio Melotti <ezio.melotti@gmail.com>
parents: 77577
diff changeset
288 * more bits than fit in a C double (e.g., on a 64-bit box long may have
33547
702367da2c72 SF bug #513866: Float/long comparison anomaly.
Tim Peters <tim.peters@gmail.com>
parents: 32533
diff changeset
289 * 63 bits of precision, but a C double probably has only 53), and then
702367da2c72 SF bug #513866: Float/long comparison anomaly.
Tim Peters <tim.peters@gmail.com>
parents: 32533
diff changeset
290 * we can falsely claim equality when low-order integer bits are lost by
702367da2c72 SF bug #513866: Float/long comparison anomaly.
Tim Peters <tim.peters@gmail.com>
parents: 32533
diff changeset
291 * coercion to double. So this part is painful too.
702367da2c72 SF bug #513866: Float/long comparison anomaly.
Tim Peters <tim.peters@gmail.com>
parents: 32533
diff changeset
292 */
702367da2c72 SF bug #513866: Float/long comparison anomaly.
Tim Peters <tim.peters@gmail.com>
parents: 32533
diff changeset
293
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Michael W. Hudson <mwh@python.net>
parents: 31384
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294 static PyObject*
a6d8d5ace6a7 "Fix" (for certain configurations of the planets, including
Michael W. Hudson <mwh@python.net>
parents: 31384
diff changeset
295 float_richcompare(PyObject *v, PyObject *w, int op)
a6d8d5ace6a7 "Fix" (for certain configurations of the planets, including
Michael W. Hudson <mwh@python.net>
parents: 31384
diff changeset
296 {
61467
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297 double i, j;
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298 int r = 0;
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Michael W. Hudson <mwh@python.net>
parents: 31384
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299
61467
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300 assert(PyFloat_Check(v));
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301 i = PyFloat_AS_DOUBLE(v);
33547
702367da2c72 SF bug #513866: Float/long comparison anomaly.
Tim Peters <tim.peters@gmail.com>
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302
61467
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303 /* Switch on the type of w. Set i and j to doubles to be compared,
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304 * and op to the richcomp to use.
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305 */
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306 if (PyFloat_Check(w))
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307 j = PyFloat_AS_DOUBLE(w);
33547
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Tim Peters <tim.peters@gmail.com>
parents: 32533
diff changeset
308
61467
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309 else if (!Py_IS_FINITE(i)) {
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310 if (PyLong_Check(w))
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311 /* If i is an infinity, its magnitude exceeds any
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312 * finite integer, so it doesn't matter which int we
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313 * compare i with. If i is a NaN, similarly.
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314 */
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315 j = 0.0;
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316 else
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317 goto Unimplemented;
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318 }
33547
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Tim Peters <tim.peters@gmail.com>
parents: 32533
diff changeset
319
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320 else if (PyLong_Check(w)) {
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321 int vsign = i == 0.0 ? 0 : i < 0.0 ? -1 : 1;
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322 int wsign = _PyLong_Sign(w);
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323 size_t nbits;
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324 int exponent;
31553
a6d8d5ace6a7 "Fix" (for certain configurations of the planets, including
Michael W. Hudson <mwh@python.net>
parents: 31384
diff changeset
325
61467
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326 if (vsign != wsign) {
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327 /* Magnitudes are irrelevant -- the signs alone
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328 * determine the outcome.
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329 */
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330 i = (double)vsign;
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331 j = (double)wsign;
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332 goto Compare;
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333 }
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334 /* The signs are the same. */
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335 /* Convert w to a double if it fits. In particular, 0 fits. */
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336 nbits = _PyLong_NumBits(w);
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337 if (nbits == (size_t)-1 && PyErr_Occurred()) {
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338 /* This long is so large that size_t isn't big enough
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339 * to hold the # of bits. Replace with little doubles
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340 * that give the same outcome -- w is so large that
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341 * its magnitude must exceed the magnitude of any
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342 * finite float.
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343 */
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344 PyErr_Clear();
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345 i = (double)vsign;
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346 assert(wsign != 0);
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347 j = wsign * 2.0;
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348 goto Compare;
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349 }
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350 if (nbits <= 48) {
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351 j = PyLong_AsDouble(w);
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352 /* It's impossible that <= 48 bits overflowed. */
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353 assert(j != -1.0 || ! PyErr_Occurred());
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354 goto Compare;
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355 }
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356 assert(wsign != 0); /* else nbits was 0 */
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357 assert(vsign != 0); /* if vsign were 0, then since wsign is
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358 * not 0, we would have taken the
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359 * vsign != wsign branch at the start */
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360 /* We want to work with non-negative numbers. */
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361 if (vsign < 0) {
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362 /* "Multiply both sides" by -1; this also swaps the
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363 * comparator.
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364 */
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365 i = -i;
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366 op = _Py_SwappedOp[op];
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367 }
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368 assert(i > 0.0);
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369 (void) frexp(i, &exponent);
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370 /* exponent is the # of bits in v before the radix point;
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371 * we know that nbits (the # of bits in w) > 48 at this point
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372 */
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373 if (exponent < 0 || (size_t)exponent < nbits) {
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374 i = 1.0;
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375 j = 2.0;
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376 goto Compare;
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377 }
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378 if ((size_t)exponent > nbits) {
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379 i = 2.0;
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380 j = 1.0;
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381 goto Compare;
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382 }
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383 /* v and w have the same number of bits before the radix
85418
4d62a62ba44d Issue #18783: Removed existing mentions of Python long type in docstrings,
Serhiy Storchaka <storchaka@gmail.com>
parents: 81772
diff changeset
384 * point. Construct two ints that have the same comparison
61467
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385 * outcome.
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386 */
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387 {
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388 double fracpart;
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389 double intpart;
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390 PyObject *result = NULL;
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391 PyObject *one = NULL;
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diff changeset
392 PyObject *vv = NULL;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
393 PyObject *ww = w;
33547
702367da2c72 SF bug #513866: Float/long comparison anomaly.
Tim Peters <tim.peters@gmail.com>
parents: 32533
diff changeset
394
61467
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diff changeset
395 if (wsign < 0) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
396 ww = PyNumber_Negative(w);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
397 if (ww == NULL)
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
398 goto Error;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
399 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
400 else
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
401 Py_INCREF(ww);
33547
702367da2c72 SF bug #513866: Float/long comparison anomaly.
Tim Peters <tim.peters@gmail.com>
parents: 32533
diff changeset
402
61467
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
403 fracpart = modf(i, &intpart);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
404 vv = PyLong_FromDouble(intpart);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
405 if (vv == NULL)
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
406 goto Error;
33547
702367da2c72 SF bug #513866: Float/long comparison anomaly.
Tim Peters <tim.peters@gmail.com>
parents: 32533
diff changeset
407
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
408 if (fracpart != 0.0) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
409 /* Shift left, and or a 1 bit into vv
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
410 * to represent the lost fraction.
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parents: 54232
diff changeset
411 */
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
412 PyObject *temp;
33547
702367da2c72 SF bug #513866: Float/long comparison anomaly.
Tim Peters <tim.peters@gmail.com>
parents: 32533
diff changeset
413
61467
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
414 one = PyLong_FromLong(1);
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
415 if (one == NULL)
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
416 goto Error;
33547
702367da2c72 SF bug #513866: Float/long comparison anomaly.
Tim Peters <tim.peters@gmail.com>
parents: 32533
diff changeset
417
61467
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
418 temp = PyNumber_Lshift(ww, one);
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parents: 54232
diff changeset
419 if (temp == NULL)
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
420 goto Error;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
421 Py_DECREF(ww);
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parents: 54232
diff changeset
422 ww = temp;
33547
702367da2c72 SF bug #513866: Float/long comparison anomaly.
Tim Peters <tim.peters@gmail.com>
parents: 32533
diff changeset
423
61467
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diff changeset
424 temp = PyNumber_Lshift(vv, one);
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parents: 54232
diff changeset
425 if (temp == NULL)
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
426 goto Error;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
427 Py_DECREF(vv);
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
428 vv = temp;
33547
702367da2c72 SF bug #513866: Float/long comparison anomaly.
Tim Peters <tim.peters@gmail.com>
parents: 32533
diff changeset
429
61467
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diff changeset
430 temp = PyNumber_Or(vv, one);
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parents: 54232
diff changeset
431 if (temp == NULL)
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
432 goto Error;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
433 Py_DECREF(vv);
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
434 vv = temp;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
435 }
33547
702367da2c72 SF bug #513866: Float/long comparison anomaly.
Tim Peters <tim.peters@gmail.com>
parents: 32533
diff changeset
436
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
437 r = PyObject_RichCompareBool(vv, ww, op);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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parents: 54232
diff changeset
438 if (r < 0)
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
439 goto Error;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
440 result = PyBool_FromLong(r);
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parents: 54232
diff changeset
441 Error:
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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parents: 54232
diff changeset
442 Py_XDECREF(vv);
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parents: 54232
diff changeset
443 Py_XDECREF(ww);
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parents: 54232
diff changeset
444 Py_XDECREF(one);
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parents: 54232
diff changeset
445 return result;
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parents: 54232
diff changeset
446 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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diff changeset
447 } /* else if (PyLong_Check(w)) */
33547
702367da2c72 SF bug #513866: Float/long comparison anomaly.
Tim Peters <tim.peters@gmail.com>
parents: 32533
diff changeset
448
85418
4d62a62ba44d Issue #18783: Removed existing mentions of Python long type in docstrings,
Serhiy Storchaka <storchaka@gmail.com>
parents: 81772
diff changeset
449 else /* w isn't float or int */
61467
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diff changeset
450 goto Unimplemented;
33547
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Tim Peters <tim.peters@gmail.com>
parents: 32533
diff changeset
451
702367da2c72 SF bug #513866: Float/long comparison anomaly.
Tim Peters <tim.peters@gmail.com>
parents: 32533
diff changeset
452 Compare:
61467
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diff changeset
453 PyFPE_START_PROTECT("richcompare", return NULL)
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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parents: 54232
diff changeset
454 switch (op) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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parents: 54232
diff changeset
455 case Py_EQ:
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parents: 54232
diff changeset
456 r = i == j;
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parents: 54232
diff changeset
457 break;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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parents: 54232
diff changeset
458 case Py_NE:
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parents: 54232
diff changeset
459 r = i != j;
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parents: 54232
diff changeset
460 break;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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parents: 54232
diff changeset
461 case Py_LE:
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parents: 54232
diff changeset
462 r = i <= j;
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parents: 54232
diff changeset
463 break;
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parents: 54232
diff changeset
464 case Py_GE:
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diff changeset
465 r = i >= j;
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parents: 54232
diff changeset
466 break;
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parents: 54232
diff changeset
467 case Py_LT:
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parents: 54232
diff changeset
468 r = i < j;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
469 break;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
470 case Py_GT:
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
471 r = i > j;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
472 break;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
473 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
474 PyFPE_END_PROTECT(r)
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
475 return PyBool_FromLong(r);
33547
702367da2c72 SF bug #513866: Float/long comparison anomaly.
Tim Peters <tim.peters@gmail.com>
parents: 32533
diff changeset
476
702367da2c72 SF bug #513866: Float/long comparison anomaly.
Tim Peters <tim.peters@gmail.com>
parents: 32533
diff changeset
477 Unimplemented:
71810
d0b0fcbb40db Replace Py_NotImplemented returns with the macro form Py_RETURN_NOTIMPLEMENTED.
Brian Curtin <brian@python.org>
parents: 69498
diff changeset
478 Py_RETURN_NOTIMPLEMENTED;
31553
a6d8d5ace6a7 "Fix" (for certain configurations of the planets, including
Michael W. Hudson <mwh@python.net>
parents: 31384
diff changeset
479 }
a6d8d5ace6a7 "Fix" (for certain configurations of the planets, including
Michael W. Hudson <mwh@python.net>
parents: 31384
diff changeset
480
65494
e8969fb822fc make hashes always the size of pointers; introduce Py_hash_t #9778
Benjamin Peterson <benjamin@python.org>
parents: 63750
diff changeset
481 static Py_hash_t
13454
fcc75a3748f5 ANSI-fication of the sources.
Fred Drake <fdrake@acm.org>
parents: 13447
diff changeset
482 float_hash(PyFloatObject *v)
1257
1cabc2b6c970 * Changed all copyright messages to include 1993.
Guido van Rossum <guido@python.org>
parents: 1252
diff changeset
483 {
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
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diff changeset
484 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
485 }
1cabc2b6c970 * Changed all copyright messages to include 1993.
Guido van Rossum <guido@python.org>
parents: 1252
diff changeset
486
5396
d1447950fa04 Quickly renamed the last directory.
Guido van Rossum <guido@python.org>
parents: 5197
diff changeset
487 static PyObject *
15723
ac7ae3ead88a Make float a new style number type.
Neil Schemenauer <nascheme@enme.ucalgary.ca>
parents: 15318
diff changeset
488 float_add(PyObject *v, PyObject *w)
6
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
489 {
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
490 double a,b;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
491 CONVERT_TO_DOUBLE(v, a);
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
492 CONVERT_TO_DOUBLE(w, b);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
493 PyFPE_START_PROTECT("add", return 0)
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
494 a = a + b;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
495 PyFPE_END_PROTECT(a)
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
496 return PyFloat_FromDouble(a);
6
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
497 }
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
498
5396
d1447950fa04 Quickly renamed the last directory.
Guido van Rossum <guido@python.org>
parents: 5197
diff changeset
499 static PyObject *
15723
ac7ae3ead88a Make float a new style number type.
Neil Schemenauer <nascheme@enme.ucalgary.ca>
parents: 15318
diff changeset
500 float_sub(PyObject *v, PyObject *w)
6
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
501 {
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
502 double a,b;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
503 CONVERT_TO_DOUBLE(v, a);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
504 CONVERT_TO_DOUBLE(w, b);
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
505 PyFPE_START_PROTECT("subtract", return 0)
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
506 a = a - b;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
507 PyFPE_END_PROTECT(a)
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
508 return PyFloat_FromDouble(a);
6
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
509 }
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
510
5396
d1447950fa04 Quickly renamed the last directory.
Guido van Rossum <guido@python.org>
parents: 5197
diff changeset
511 static PyObject *
15723
ac7ae3ead88a Make float a new style number type.
Neil Schemenauer <nascheme@enme.ucalgary.ca>
parents: 15318
diff changeset
512 float_mul(PyObject *v, PyObject *w)
6
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
513 {
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
514 double a,b;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
515 CONVERT_TO_DOUBLE(v, a);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
516 CONVERT_TO_DOUBLE(w, b);
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
517 PyFPE_START_PROTECT("multiply", return 0)
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
518 a = a * b;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
519 PyFPE_END_PROTECT(a)
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
520 return PyFloat_FromDouble(a);
6
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
521 }
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
522
5396
d1447950fa04 Quickly renamed the last directory.
Guido van Rossum <guido@python.org>
parents: 5197
diff changeset
523 static PyObject *
15723
ac7ae3ead88a Make float a new style number type.
Neil Schemenauer <nascheme@enme.ucalgary.ca>
parents: 15318
diff changeset
524 float_div(PyObject *v, PyObject *w)
6
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
525 {
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
526 double a,b;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
527 CONVERT_TO_DOUBLE(v, a);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
528 CONVERT_TO_DOUBLE(w, b);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
529 if (b == 0.0) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
530 PyErr_SetString(PyExc_ZeroDivisionError,
61466
cab14be0ada1 Recorded merge of revisions 81029 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
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531 "float division by zero");
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532 return NULL;
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533 }
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534 PyFPE_START_PROTECT("divide", return 0)
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535 a = a / b;
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536 PyFPE_END_PROTECT(a)
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537 return PyFloat_FromDouble(a);
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538 }
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539
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540 static PyObject *
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541 float_rem(PyObject *v, PyObject *w)
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542 {
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543 double vx, wx;
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544 double mod;
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545 CONVERT_TO_DOUBLE(v, vx);
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546 CONVERT_TO_DOUBLE(w, wx);
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547 if (wx == 0.0) {
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548 PyErr_SetString(PyExc_ZeroDivisionError,
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549 "float modulo");
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550 return NULL;
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551 }
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552 PyFPE_START_PROTECT("modulo", return 0)
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553 mod = fmod(vx, wx);
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554 if (mod) {
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555 /* ensure the remainder has the same sign as the denominator */
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556 if ((wx < 0) != (mod < 0)) {
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557 mod += wx;
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558 }
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559 }
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560 else {
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561 /* the remainder is zero, and in the presence of signed zeroes
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562 fmod returns different results across platforms; ensure
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563 it has the same sign as the denominator. */
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564 mod = copysign(0.0, wx);
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565 }
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566 PyFPE_END_PROTECT(mod)
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567 return PyFloat_FromDouble(mod);
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568 }
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569
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570 static PyObject *
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571 float_divmod(PyObject *v, PyObject *w)
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572 {
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573 double vx, wx;
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574 double div, mod, floordiv;
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575 CONVERT_TO_DOUBLE(v, vx);
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576 CONVERT_TO_DOUBLE(w, wx);
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577 if (wx == 0.0) {
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578 PyErr_SetString(PyExc_ZeroDivisionError, "float divmod()");
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579 return NULL;
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580 }
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581 PyFPE_START_PROTECT("divmod", return 0)
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582 mod = fmod(vx, wx);
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583 /* fmod is typically exact, so vx-mod is *mathematically* an
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584 exact multiple of wx. But this is fp arithmetic, and fp
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585 vx - mod is an approximation; the result is that div may
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586 not be an exact integral value after the division, although
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587 it will always be very close to one.
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588 */
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589 div = (vx - mod) / wx;
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590 if (mod) {
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591 /* ensure the remainder has the same sign as the denominator */
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592 if ((wx < 0) != (mod < 0)) {
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593 mod += wx;
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594 div -= 1.0;
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595 }
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596 }
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597 else {
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598 /* the remainder is zero, and in the presence of signed zeroes
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599 fmod returns different results across platforms; ensure
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600 it has the same sign as the denominator. */
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601 mod = copysign(0.0, wx);
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602 }
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603 /* snap quotient to nearest integral value */
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604 if (div) {
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605 floordiv = floor(div);
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606 if (div - floordiv > 0.5)
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607 floordiv += 1.0;
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608 }
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609 else {
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610 /* div is zero - get the same sign as the true quotient */
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611 floordiv = copysign(0.0, vx / wx); /* zero w/ sign of vx/wx */
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612 }
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613 PyFPE_END_PROTECT(floordiv)
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614 return Py_BuildValue("(dd)", floordiv, mod);
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615 }
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616
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617 static PyObject *
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618 float_floor_div(PyObject *v, PyObject *w)
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619 {
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620 PyObject *t, *r;
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621
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622 t = float_divmod(v, w);
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623 if (t == NULL || t == Py_NotImplemented)
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624 return t;
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625 assert(PyTuple_CheckExact(t));
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626 r = PyTuple_GET_ITEM(t, 0);
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627 Py_INCREF(r);
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628 Py_DECREF(t);
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629 return r;
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630 }
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631
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632 /* determine whether x is an odd integer or not; assumes that
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633 x is not an infinity or nan. */
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634 #define DOUBLE_IS_ODD_INTEGER(x) (fmod(fabs(x), 2.0) == 1.0)
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635
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636 static PyObject *
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637 float_pow(PyObject *v, PyObject *w, PyObject *z)
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638 {
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639 double iv, iw, ix;
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640 int negate_result = 0;
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641
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642 if ((PyObject *)z != Py_None) {
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643 PyErr_SetString(PyExc_TypeError, "pow() 3rd argument not "
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644 "allowed unless all arguments are integers");
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645 return NULL;
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646 }
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647
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648 CONVERT_TO_DOUBLE(v, iv);
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649 CONVERT_TO_DOUBLE(w, iw);
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650
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651 /* Sort out special cases here instead of relying on pow() */
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652 if (iw == 0) { /* v**0 is 1, even 0**0 */
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653 return PyFloat_FromDouble(1.0);
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654 }
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655 if (Py_IS_NAN(iv)) { /* nan**w = nan, unless w == 0 */
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656 return PyFloat_FromDouble(iv);
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657 }
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658 if (Py_IS_NAN(iw)) { /* v**nan = nan, unless v == 1; 1**nan = 1 */
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659 return PyFloat_FromDouble(iv == 1.0 ? 1.0 : iw);
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660 }
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661 if (Py_IS_INFINITY(iw)) {
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662 /* v**inf is: 0.0 if abs(v) < 1; 1.0 if abs(v) == 1; inf if
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663 * abs(v) > 1 (including case where v infinite)
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664 *
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665 * v**-inf is: inf if abs(v) < 1; 1.0 if abs(v) == 1; 0.0 if
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666 * abs(v) > 1 (including case where v infinite)
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667 */
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668 iv = fabs(iv);
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669 if (iv == 1.0)
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670 return PyFloat_FromDouble(1.0);
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671 else if ((iw > 0.0) == (iv > 1.0))
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672 return PyFloat_FromDouble(fabs(iw)); /* return inf */
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673 else
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674 return PyFloat_FromDouble(0.0);
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675 }
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676 if (Py_IS_INFINITY(iv)) {
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677 /* (+-inf)**w is: inf for w positive, 0 for w negative; in
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678 * both cases, we need to add the appropriate sign if w is
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679 * an odd integer.
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680 */
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681 int iw_is_odd = DOUBLE_IS_ODD_INTEGER(iw);
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682 if (iw > 0.0)
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683 return PyFloat_FromDouble(iw_is_odd ? iv : fabs(iv));
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684 else
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685 return PyFloat_FromDouble(iw_is_odd ?
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686 copysign(0.0, iv) : 0.0);
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687 }
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688 if (iv == 0.0) { /* 0**w is: 0 for w positive, 1 for w zero
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689 (already dealt with above), and an error
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690 if w is negative. */
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691 int iw_is_odd = DOUBLE_IS_ODD_INTEGER(iw);
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692 if (iw < 0.0) {
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693 PyErr_SetString(PyExc_ZeroDivisionError,
61466
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694 "0.0 cannot be raised to a "
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695 "negative power");
61467
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696 return NULL;
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697 }
61466
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698 /* use correct sign if iw is odd */
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699 return PyFloat_FromDouble(iw_is_odd ? iv : 0.0);
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700 }
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701
61467
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702 if (iv < 0.0) {
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703 /* Whether this is an error is a mess, and bumps into libm
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diff changeset
704 * bugs so we have to figure it out ourselves.
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705 */
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706 if (iw != floor(iw)) {
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707 /* Negative numbers raised to fractional powers
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708 * become complex.
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709 */
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710 return PyComplex_Type.tp_as_number->nb_power(v, w, z);
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711 }
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712 /* iw is an exact integer, albeit perhaps a very large
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713 * one. Replace iv by its absolute value and remember
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714 * to negate the pow result if iw is odd.
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715 */
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716 iv = -iv;
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717 negate_result = DOUBLE_IS_ODD_INTEGER(iw);
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718 }
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719
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720 if (iv == 1.0) { /* 1**w is 1, even 1**inf and 1**nan */
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721 /* (-1) ** large_integer also ends up here. Here's an
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722 * extract from the comments for the previous
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723 * implementation explaining why this special case is
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724 * necessary:
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725 *
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726 * -1 raised to an exact integer should never be exceptional.
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727 * Alas, some libms (chiefly glibc as of early 2003) return
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728 * NaN and set EDOM on pow(-1, large_int) if the int doesn't
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729 * happen to be representable in a *C* integer. That's a
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730 * bug.
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731 */
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732 return PyFloat_FromDouble(negate_result ? -1.0 : 1.0);
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733 }
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734
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735 /* Now iv and iw are finite, iw is nonzero, and iv is
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736 * positive and not equal to 1.0. We finally allow
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737 * the platform pow to step in and do the rest.
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738 */
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739 errno = 0;
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740 PyFPE_START_PROTECT("pow", return NULL)
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741 ix = pow(iv, iw);
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742 PyFPE_END_PROTECT(ix)
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743 Py_ADJUST_ERANGE1(ix);
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744 if (negate_result)
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745 ix = -ix;
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746
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747 if (errno != 0) {
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748 /* We don't expect any errno value other than ERANGE, but
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749 * the range of libm bugs appears unbounded.
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750 */
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751 PyErr_SetFromErrno(errno == ERANGE ? PyExc_OverflowError :
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752 PyExc_ValueError);
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753 return NULL;
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754 }
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755 return PyFloat_FromDouble(ix);
6
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756 }
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757
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758 #undef DOUBLE_IS_ODD_INTEGER
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759
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760 static PyObject *
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761 float_neg(PyFloatObject *v)
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762 {
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763 return PyFloat_FromDouble(-v->ob_fval);
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764 }
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765
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766 static PyObject *
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767 float_abs(PyFloatObject *v)
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768 {
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769 return PyFloat_FromDouble(fabs(v->ob_fval));
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770 }
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771
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772 static int
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773 float_bool(PyFloatObject *v)
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774 {
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775 return v->ob_fval != 0.0;
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776 }
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777
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778 static PyObject *
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779 float_is_integer(PyObject *v)
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780 {
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781 double x = PyFloat_AsDouble(v);
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782 PyObject *o;
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783
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784 if (x == -1.0 && PyErr_Occurred())
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785 return NULL;
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786 if (!Py_IS_FINITE(x))
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787 Py_RETURN_FALSE;
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788 errno = 0;
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789 PyFPE_START_PROTECT("is_integer", return NULL)
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790 o = (floor(x) == x) ? Py_True : Py_False;
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791 PyFPE_END_PROTECT(x)
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792 if (errno != 0) {
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793 PyErr_SetFromErrno(errno == ERANGE ? PyExc_OverflowError :
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794 PyExc_ValueError);
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795 return NULL;
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796 }
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diff changeset
797 Py_INCREF(o);
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798 return o;
46477
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799 }
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diff changeset
800
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diff changeset
801 #if 0
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diff changeset
802 static PyObject *
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diff changeset
803 float_is_inf(PyObject *v)
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diff changeset
804 {
61467
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diff changeset
805 double x = PyFloat_AsDouble(v);
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diff changeset
806 if (x == -1.0 && PyErr_Occurred())
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diff changeset
807 return NULL;
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diff changeset
808 return PyBool_FromLong((long)Py_IS_INFINITY(x));
46477
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diff changeset
809 }
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diff changeset
810
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diff changeset
811 static PyObject *
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diff changeset
812 float_is_nan(PyObject *v)
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diff changeset
813 {
61467
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diff changeset
814 double x = PyFloat_AsDouble(v);
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diff changeset
815 if (x == -1.0 && PyErr_Occurred())
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diff changeset
816 return NULL;
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diff changeset
817 return PyBool_FromLong((long)Py_IS_NAN(x));
46477
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diff changeset
818 }
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diff changeset
819
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diff changeset
820 static PyObject *
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diff changeset
821 float_is_finite(PyObject *v)
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diff changeset
822 {
61467
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823 double x = PyFloat_AsDouble(v);
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diff changeset
824 if (x == -1.0 && PyErr_Occurred())
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825 return NULL;
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826 return PyBool_FromLong((long)Py_IS_FINITE(x));
46477
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827 }
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828 #endif
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829
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diff changeset
830 static PyObject *
42753
077fe7860cc9 Finish the work on __round__ and __trunc__.
Guido van Rossum <guido@python.org>
parents: 42559
diff changeset
831 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
832 {
61467
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833 double x = PyFloat_AsDouble(v);
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diff changeset
834 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
835
61467
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diff changeset
836 (void)modf(x, &wholepart);
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diff changeset
837 /* Try to get out cheap if this fits in a Python int. The attempt
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diff changeset
838 * to cast to long must be protected, as C doesn't define what
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diff changeset
839 * happens if the double is too big to fit in a long. Some rare
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840 * systems raise an exception then (RISCOS was mentioned as one,
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841 * and someone using a non-default option on Sun also bumped into
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diff changeset
842 * that). Note that checking for >= and <= LONG_{MIN,MAX} would
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843 * still be vulnerable: if a long has more bits of precision than
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diff changeset
844 * a double, casting MIN/MAX to double may yield an approximation,
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845 * and if that's rounded up, then, e.g., wholepart=LONG_MAX+1 would
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846 * yield true from the C expression wholepart<=LONG_MAX, despite
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847 * that wholepart is actually greater than LONG_MAX.
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diff changeset
848 */
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849 if (LONG_MIN < wholepart && wholepart < LONG_MAX) {
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diff changeset
850 const long aslong = (long)wholepart;
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851 return PyLong_FromLong(aslong);
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852 }
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853 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
854 }
2ed511171809 Made builtins int(), long(), float(), oct() and hex() more generic.
Guido van Rossum <guido@python.org>
parents: 955
diff changeset
855
53218
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Mark Dickinson <dickinsm@gmail.com>
parents: 53187
diff changeset
856 /* 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
857 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
858 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
859 returns NULL on failure (OverflowError and memory errors are possible). */
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Mark Dickinson <dickinsm@gmail.com>
parents: 53187
diff changeset
860
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Mark Dickinson <dickinsm@gmail.com>
parents: 53187
diff changeset
861 #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
862 /* 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
863 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
864
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Mark Dickinson <dickinsm@gmail.com>
parents: 53187
diff changeset
865 static PyObject *
d43d64252d36 Issue #1869 (and 4707, 5118, 5473, 1456775): use the new
Mark Dickinson <dickinsm@gmail.com>
parents: 53187
diff changeset
866 double_round(double x, int ndigits) {
d43d64252d36 Issue #1869 (and 4707, 5118, 5473, 1456775): use the new
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diff changeset
867
61467
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diff changeset
868 double rounded;
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diff changeset
869 Py_ssize_t buflen, mybuflen=100;
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870 char *buf, *buf_end, shortbuf[100], *mybuf=shortbuf;
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871 int decpt, sign;
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872 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
873 _Py_SET_53BIT_PRECISION_HEADER;
53218
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parents: 53187
diff changeset
874
61467
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875 /* round to a decimal string */
74662
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Mark Dickinson <mdickinson@enthought.com>
parents: 69497
diff changeset
876 _Py_SET_53BIT_PRECISION_START;
61467
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877 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
878 _Py_SET_53BIT_PRECISION_END;
61467
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879 if (buf == NULL) {
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880 PyErr_NoMemory();
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881 return NULL;
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882 }
53218
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Mark Dickinson <dickinsm@gmail.com>
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diff changeset
883
61467
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884 /* Get new buffer if shortbuf is too small. Space needed <= buf_end -
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885 buf + 8: (1 extra for '0', 1 for sign, 5 for exp, 1 for '\0'). */
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886 buflen = buf_end - buf;
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887 if (buflen + 8 > mybuflen) {
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888 mybuflen = buflen+8;
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889 mybuf = (char *)PyMem_Malloc(mybuflen);
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890 if (mybuf == NULL) {
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891 PyErr_NoMemory();
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892 goto exit;
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893 }
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894 }
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diff changeset
895 /* copy buf to mybuf, adding exponent, sign and leading 0 */
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896 PyOS_snprintf(mybuf, mybuflen, "%s0%se%d", (sign ? "-" : ""),
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diff changeset
897 buf, decpt - (int)buflen);
53218
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Mark Dickinson <dickinsm@gmail.com>
parents: 53187
diff changeset
898
61467
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diff changeset
899 /* and convert the resulting string back to a double */
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diff changeset
900 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
901 _Py_SET_53BIT_PRECISION_START;
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902 rounded = _Py_dg_strtod(mybuf, NULL);
74662
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Mark Dickinson <mdickinson@enthought.com>
parents: 69497
diff changeset
903 _Py_SET_53BIT_PRECISION_END;
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904 if (errno == ERANGE && fabs(rounded) >= 1.)
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905 PyErr_SetString(PyExc_OverflowError,
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diff changeset
906 "rounded value too large to represent");
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907 else
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908 result = PyFloat_FromDouble(rounded);
53218
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Mark Dickinson <dickinsm@gmail.com>
parents: 53187
diff changeset
909
61467
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910 /* done computing value; now clean up */
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911 if (mybuf != shortbuf)
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912 PyMem_Free(mybuf);
53218
d43d64252d36 Issue #1869 (and 4707, 5118, 5473, 1456775): use the new
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parents: 53187
diff changeset
913 exit:
61467
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914 _Py_dg_freedtoa(buf);
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diff changeset
915 return result;
53218
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Mark Dickinson <dickinsm@gmail.com>
parents: 53187
diff changeset
916 }
d43d64252d36 Issue #1869 (and 4707, 5118, 5473, 1456775): use the new
Mark Dickinson <dickinsm@gmail.com>
parents: 53187
diff changeset
917
d43d64252d36 Issue #1869 (and 4707, 5118, 5473, 1456775): use the new
Mark Dickinson <dickinsm@gmail.com>
parents: 53187
diff changeset
918 #else /* PY_NO_SHORT_FLOAT_REPR */
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Mark Dickinson <dickinsm@gmail.com>
parents: 53187
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919
d43d64252d36 Issue #1869 (and 4707, 5118, 5473, 1456775): use the new
Mark Dickinson <dickinsm@gmail.com>
parents: 53187
diff changeset
920 /* 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
921 conversions aren't available */
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parents: 53187
diff changeset
922
d43d64252d36 Issue #1869 (and 4707, 5118, 5473, 1456775): use the new
Mark Dickinson <dickinsm@gmail.com>
parents: 53187
diff changeset
923 static PyObject *
d43d64252d36 Issue #1869 (and 4707, 5118, 5473, 1456775): use the new
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parents: 53187
diff changeset
924 double_round(double x, int ndigits) {
61467
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diff changeset
925 double pow1, pow2, y, z;
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diff changeset
926 if (ndigits >= 0) {
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diff changeset
927 if (ndigits > 22) {
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diff changeset
928 /* pow1 and pow2 are each safe from overflow, but
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diff changeset
929 pow1*pow2 ~= pow(10.0, ndigits) might overflow */
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diff changeset
930 pow1 = pow(10.0, (double)(ndigits-22));
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diff changeset
931 pow2 = 1e22;
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diff changeset
932 }
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933 else {
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diff changeset
934 pow1 = pow(10.0, (double)ndigits);
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diff changeset
935 pow2 = 1.0;
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936 }
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937 y = (x*pow1)*pow2;
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diff changeset
938 /* if y overflows, then rounded value is exactly x */
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diff changeset
939 if (!Py_IS_FINITE(y))
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940 return PyFloat_FromDouble(x);
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941 }
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942 else {
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943 pow1 = pow(10.0, (double)-ndigits);
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diff changeset
944 pow2 = 1.0; /* unused; silences a gcc compiler warning */
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945 y = x / pow1;
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946 }
53218
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947
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948 z = round(y);
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949 if (fabs(y-z) == 0.5)
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950 /* halfway between two integers; use round-half-even */
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951 z = 2.0*round(y/2.0);
53218
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952
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953 if (ndigits >= 0)
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954 z = (z / pow2) / pow1;
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955 else
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956 z *= pow1;
53218
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957
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958 /* if computation resulted in overflow, raise OverflowError */
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959 if (!Py_IS_FINITE(z)) {
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960 PyErr_SetString(PyExc_OverflowError,
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961 "overflow occurred during round");
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962 return NULL;
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963 }
53218
d43d64252d36 Issue #1869 (and 4707, 5118, 5473, 1456775): use the new
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964
61467
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965 return PyFloat_FromDouble(z);
53218
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966 }
d43d64252d36 Issue #1869 (and 4707, 5118, 5473, 1456775): use the new
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967
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968 #endif /* PY_NO_SHORT_FLOAT_REPR */
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969
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diff changeset
970 /* round a Python float v to the closest multiple of 10**-ndigits */
d43d64252d36 Issue #1869 (and 4707, 5118, 5473, 1456775): use the new
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parents: 53187
diff changeset
971
5396
d1447950fa04 Quickly renamed the last directory.
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parents: 5197
diff changeset
972 static PyObject *
42753
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973 float_round(PyObject *v, PyObject *args)
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974 {
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975 double x, rounded;
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976 PyObject *o_ndigits = NULL;
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977 Py_ssize_t ndigits;
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978
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979 x = PyFloat_AsDouble(v);
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980 if (!PyArg_ParseTuple(args, "|O", &o_ndigits))
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981 return NULL;
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982 if (o_ndigits == NULL) {
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983 /* single-argument round: round to nearest integer */
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984 rounded = round(x);
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985 if (fabs(x-rounded) == 0.5)
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986 /* halfway case: round to even */
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987 rounded = 2.0*round(x/2.0);
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988 return PyLong_FromDouble(rounded);
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989 }
42753
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990
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991 /* interpret second argument as a Py_ssize_t; clips on overflow */
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992 ndigits = PyNumber_AsSsize_t(o_ndigits, NULL);
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993 if (ndigits == -1 && PyErr_Occurred())
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994 return NULL;
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995
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996 /* nans and infinities round to themselves */
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997 if (!Py_IS_FINITE(x))
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998 return PyFloat_FromDouble(x);
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999
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1000 /* Deal with extreme values for ndigits. For ndigits > NDIGITS_MAX, x
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1001 always rounds to itself. For ndigits < NDIGITS_MIN, x always
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1002 rounds to +-0.0. Here 0.30103 is an upper bound for log10(2). */
53218
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1003 #define NDIGITS_MAX ((int)((DBL_MANT_DIG-DBL_MIN_EXP) * 0.30103))
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1004 #define NDIGITS_MIN (-(int)((DBL_MAX_EXP + 1) * 0.30103))
61467
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1005 if (ndigits > NDIGITS_MAX)
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1006 /* return x */
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1007 return PyFloat_FromDouble(x);
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1008 else if (ndigits < NDIGITS_MIN)
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1009 /* return 0.0, but with sign of x */
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1010 return PyFloat_FromDouble(0.0*x);
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1011 else
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1012 /* finite x, and ndigits is not unreasonably large */
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1013 return double_round(x, (int)ndigits);
53218
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1014 #undef NDIGITS_MAX
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1015 #undef NDIGITS_MIN
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1016 }
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1017
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1018 static PyObject *
13454
fcc75a3748f5 ANSI-fication of the sources.
Fred Drake <fdrake@acm.org>
parents: 13447
diff changeset
1019 float_float(PyObject *v)
1049
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parents: 955
diff changeset
1020 {
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1021 if (PyFloat_CheckExact(v))
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1022 Py_INCREF(v);
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1023 else
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1024 v = PyFloat_FromDouble(((PyFloatObject *)v)->ob_fval);
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1025 return v;
1049
2ed511171809 Made builtins int(), long(), float(), oct() and hex() more generic.
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diff changeset
1026 }
2ed511171809 Made builtins int(), long(), float(), oct() and hex() more generic.
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diff changeset
1027
48497
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1028 /* turn ASCII hex characters into integer values and vice versa */
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1029
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1030 static char
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1031 char_from_hex(int x)
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1032 {
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1033 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
1034 return Py_hexdigits[x];
48497
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1035 }
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1036
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1037 static int
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1038 hex_from_char(char c) {
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1039 int x;
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1040 switch(c) {
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1041 case '0':
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1042 x = 0;
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1043 break;
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1044 case '1':
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1045 x = 1;
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1046 break;
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1047 case '2':
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1048 x = 2;
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1049 break;
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1050 case '3':
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1051 x = 3;
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parents: 54232
diff changeset
1052 break;
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parents: 54232
diff changeset
1053 case '4':
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diff changeset
1054 x = 4;
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parents: 54232
diff changeset
1055 break;
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parents: 54232
diff changeset
1056 case '5':
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parents: 54232
diff changeset
1057 x = 5;
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parents: 54232
diff changeset
1058 break;
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parents: 54232
diff changeset
1059 case '6':
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diff changeset
1060 x = 6;
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parents: 54232
diff changeset
1061 break;
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diff changeset
1062 case '7':
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diff changeset
1063 x = 7;
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parents: 54232
diff changeset
1064 break;
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diff changeset
1065 case '8':
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diff changeset
1066 x = 8;
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parents: 54232
diff changeset
1067 break;
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parents: 54232
diff changeset
1068 case '9':
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diff changeset
1069 x = 9;
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parents: 54232
diff changeset
1070 break;
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parents: 54232
diff changeset
1071 case 'a':
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diff changeset
1072 case 'A':
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diff changeset
1073 x = 10;
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parents: 54232
diff changeset
1074 break;
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diff changeset
1075 case 'b':
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diff changeset
1076 case 'B':
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diff changeset
1077 x = 11;
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parents: 54232
diff changeset
1078 break;
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diff changeset
1079 case 'c':
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diff changeset
1080 case 'C':
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diff changeset
1081 x = 12;
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parents: 54232
diff changeset
1082 break;
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diff changeset
1083 case 'd':
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diff changeset
1084 case 'D':
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diff changeset
1085 x = 13;
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parents: 54232
diff changeset
1086 break;
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diff changeset
1087 case 'e':
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diff changeset
1088 case 'E':
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diff changeset
1089 x = 14;
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diff changeset
1090 break;
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diff changeset
1091 case 'f':
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diff changeset
1092 case 'F':
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diff changeset
1093 x = 15;
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diff changeset
1094 break;
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diff changeset
1095 default:
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diff changeset
1096 x = -1;
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diff changeset
1097 break;
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diff changeset
1098 }
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diff changeset
1099 return x;
48497
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diff changeset
1100 }
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diff changeset
1101
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diff changeset
1102 /* convert a float to a hexadecimal string */
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diff changeset
1103
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diff changeset
1104 /* TOHEX_NBITS is DBL_MANT_DIG rounded up to the next integer
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diff changeset
1105 of the form 4k+1. */
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diff changeset
1106 #define TOHEX_NBITS DBL_MANT_DIG + 3 - (DBL_MANT_DIG+2)%4
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diff changeset
1107
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diff changeset
1108 static PyObject *
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diff changeset
1109 float_hex(PyObject *v)
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1110 {
61467
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diff changeset
1111 double x, m;
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1112 int e, shift, i, si, esign;
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1113 /* Space for 1+(TOHEX_NBITS-1)/4 digits, a decimal point, and the
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diff changeset
1114 trailing NUL byte. */
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diff changeset
1115 char s[(TOHEX_NBITS-1)/4+3];
48497
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1116
61467
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1117 CONVERT_TO_DOUBLE(v, x);
48497
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diff changeset
1118
61467
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diff changeset
1119 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
1120 return float_repr((PyFloatObject *)v);
48497
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1121
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1122 if (x == 0.0) {
62692
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diff changeset
1123 if (copysign(1.0, x) == -1.0)
61467
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1124 return PyUnicode_FromString("-0x0.0p+0");
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diff changeset
1125 else
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diff changeset
1126 return PyUnicode_FromString("0x0.0p+0");
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diff changeset
1127 }
48497
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diff changeset
1128
61467
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diff changeset
1129 m = frexp(fabs(x), &e);
84022
41a2cbe23349 Reuse Py_MIN and Py_MAX macros: remove duplicate MIN/MAX macros
Victor Stinner <victor.stinner@gmail.com>
parents: 83433
diff changeset
1130 shift = 1 - Py_MAX(DBL_MIN_EXP - e, 0);
61467
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diff changeset
1131 m = ldexp(m, shift);
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diff changeset
1132 e -= shift;
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1133
61467
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diff changeset
1134 si = 0;
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diff changeset
1135 s[si] = char_from_hex((int)m);
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diff changeset
1136 si++;
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diff changeset
1137 m -= (int)m;
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diff changeset
1138 s[si] = '.';
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diff changeset
1139 si++;
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diff changeset
1140 for (i=0; i < (TOHEX_NBITS-1)/4; i++) {
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diff changeset
1141 m *= 16.0;
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diff changeset
1142 s[si] = char_from_hex((int)m);
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diff changeset
1143 si++;
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diff changeset
1144 m -= (int)m;
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1145 }
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1146 s[si] = '\0';
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1147
61467
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1148 if (e < 0) {
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diff changeset
1149 esign = (int)'-';
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diff changeset
1150 e = -e;
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1151 }
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1152 else
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diff changeset
1153 esign = (int)'+';
48497
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1154
61467
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1155 if (x < 0.0)
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diff changeset
1156 return PyUnicode_FromFormat("-0x%sp%c%d", s, esign, e);
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1157 else
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1158 return PyUnicode_FromFormat("0x%sp%c%d", s, esign, e);
48497
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1159 }
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diff changeset
1160
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diff changeset
1161 PyDoc_STRVAR(float_hex_doc,
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diff changeset
1162 "float.hex() -> string\n\
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diff changeset
1163 \n\
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1164 Return a hexadecimal representation of a floating-point number.\n\
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diff changeset
1165 >>> (-0.1).hex()\n\
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diff changeset
1166 '-0x1.999999999999ap-4'\n\
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diff changeset
1167 >>> 3.14159.hex()\n\
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diff changeset
1168 '0x1.921f9f01b866ep+1'");
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diff changeset
1169
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diff changeset
1170 /* Convert a hexadecimal string to a float. */
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diff changeset
1171
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1172 static PyObject *
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diff changeset
1173 float_fromhex(PyObject *cls, PyObject *arg)
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1174 {
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1175 PyObject *result_as_float, *result;
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diff changeset
1176 double x;
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diff changeset
1177 long exp, top_exp, lsb, key_digit;
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diff changeset
1178 char *s, *coeff_start, *s_store, *coeff_end, *exp_start, *s_end;
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diff changeset
1179 int half_eps, digit, round_up, negate=0;
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diff changeset
1180 Py_ssize_t length, ndigits, fdigits, i;
48497
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1181
61467
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diff changeset
1182 /*
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1183 * For the sake of simplicity and correctness, we impose an artificial
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1184 * limit on ndigits, the total number of hex digits in the coefficient
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1185 * The limit is chosen to ensure that, writing exp for the exponent,
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diff changeset
1186 *
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parents: 54232
diff changeset
1187 * (1) if exp > LONG_MAX/2 then the value of the hex string is
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1188 * guaranteed to overflow (provided it's nonzero)
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1189 *
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1190 * (2) if exp < LONG_MIN/2 then the value of the hex string is
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1191 * guaranteed to underflow to 0.
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1192 *
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1193 * (3) if LONG_MIN/2 <= exp <= LONG_MAX/2 then there's no danger of
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1194 * overflow in the calculation of exp and top_exp below.
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1195 *
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1196 * More specifically, ndigits is assumed to satisfy the following
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1197 * inequalities:
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1198 *
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1199 * 4*ndigits <= DBL_MIN_EXP - DBL_MANT_DIG - LONG_MIN/2
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1200 * 4*ndigits <= LONG_MAX/2 + 1 - DBL_MAX_EXP
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1201 *
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1202 * If either of these inequalities is not satisfied, a ValueError is
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1203 * raised. Otherwise, write x for the value of the hex string, and
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1204 * assume x is nonzero. Then
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1205 *
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1206 * 2**(exp-4*ndigits) <= |x| < 2**(exp+4*ndigits).
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1207 *
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1208 * Now if exp > LONG_MAX/2 then:
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1209 *
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1210 * exp - 4*ndigits >= LONG_MAX/2 + 1 - (LONG_MAX/2 + 1 - DBL_MAX_EXP)
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1211 * = DBL_MAX_EXP
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1212 *
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1213 * so |x| >= 2**DBL_MAX_EXP, which is too large to be stored in C
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1214 * double, so overflows. If exp < LONG_MIN/2, then
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1215 *
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1216 * exp + 4*ndigits <= LONG_MIN/2 - 1 + (
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1217 * DBL_MIN_EXP - DBL_MANT_DIG - LONG_MIN/2)
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1218 * = DBL_MIN_EXP - DBL_MANT_DIG - 1
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1219 *
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1220 * and so |x| < 2**(DBL_MIN_EXP-DBL_MANT_DIG-1), hence underflows to 0
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1221 * when converted to a C double.
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1222 *
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1223 * 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
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1224 * exp+4*ndigits and exp-4*ndigits are within the range of a long.
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1225 */
48497
2bb866d282ba Merged revisions 64974 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
parents: 48364
diff changeset
1226
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1227 s = _PyUnicode_AsStringAndSize(arg, &length);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1228 if (s == NULL)
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1229 return NULL;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1230 s_end = s + length;
48497
2bb866d282ba Merged revisions 64974 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
parents: 48364
diff changeset
1231
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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parents: 54232
diff changeset
1232 /********************
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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parents: 54232
diff changeset
1233 * Parse the string *
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1234 ********************/
48497
2bb866d282ba Merged revisions 64974 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
parents: 48364
diff changeset
1235
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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parents: 54232
diff changeset
1236 /* leading whitespace */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1237 while (Py_ISSPACE(*s))
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1238 s++;
48497
2bb866d282ba Merged revisions 64974 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
parents: 48364
diff changeset
1239
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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parents: 54232
diff changeset
1240 /* infinities and nans */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1241 x = _Py_parse_inf_or_nan(s, &coeff_end);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1242 if (coeff_end != s) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1243 s = coeff_end;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1244 goto finished;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1245 }
54232
4501b638fc3f Refactor to remove duplicated nan/inf parsing code in
Mark Dickinson <dickinsm@gmail.com>
parents: 54001
diff changeset
1246
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1247 /* optional sign */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1248 if (*s == '-') {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1249 s++;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1250 negate = 1;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1251 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1252 else if (*s == '+')
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1253 s++;
48497
2bb866d282ba Merged revisions 64974 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
parents: 48364
diff changeset
1254
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1255 /* [0x] */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1256 s_store = s;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1257 if (*s == '0') {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1258 s++;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1259 if (*s == 'x' || *s == 'X')
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1260 s++;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1261 else
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1262 s = s_store;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1263 }
48497
2bb866d282ba Merged revisions 64974 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
parents: 48364
diff changeset
1264
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1265 /* coefficient: <integer> [. <fraction>] */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1266 coeff_start = s;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1267 while (hex_from_char(*s) >= 0)
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1268 s++;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1269 s_store = s;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1270 if (*s == '.') {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1271 s++;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1272 while (hex_from_char(*s) >= 0)
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1273 s++;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1274 coeff_end = s-1;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1275 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1276 else
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1277 coeff_end = s;
48497
2bb866d282ba Merged revisions 64974 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
parents: 48364
diff changeset
1278
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1279 /* ndigits = total # of hex digits; fdigits = # after point */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1280 ndigits = coeff_end - coeff_start;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1281 fdigits = coeff_end - s_store;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1282 if (ndigits == 0)
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1283 goto parse_error;
84022
41a2cbe23349 Reuse Py_MIN and Py_MAX macros: remove duplicate MIN/MAX macros
Victor Stinner <victor.stinner@gmail.com>
parents: 83433
diff changeset
1284 if (ndigits > Py_MIN(DBL_MIN_EXP - DBL_MANT_DIG - LONG_MIN/2,
41a2cbe23349 Reuse Py_MIN and Py_MAX macros: remove duplicate MIN/MAX macros
Victor Stinner <victor.stinner@gmail.com>
parents: 83433
diff changeset
1285 LONG_MAX/2 + 1 - DBL_MAX_EXP)/4)
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1286 goto insane_length_error;
48497
2bb866d282ba Merged revisions 64974 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
parents: 48364
diff changeset
1287
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1288 /* [p <exponent>] */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1289 if (*s == 'p' || *s == 'P') {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1290 s++;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1291 exp_start = s;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1292 if (*s == '-' || *s == '+')
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1293 s++;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1294 if (!('0' <= *s && *s <= '9'))
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1295 goto parse_error;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1296 s++;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1297 while ('0' <= *s && *s <= '9')
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1298 s++;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1299 exp = strtol(exp_start, NULL, 10);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1300 }
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1301 else
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1302 exp = 0;
48497
2bb866d282ba Merged revisions 64974 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
parents: 48364
diff changeset
1303
2bb866d282ba Merged revisions 64974 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
parents: 48364
diff changeset
1304 /* 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
1305 #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
1306 coeff_end-(j) : \
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1307 coeff_end-1-(j)))
48497
2bb866d282ba Merged revisions 64974 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
parents: 48364
diff changeset
1308
61467
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parents: 54232
diff changeset
1309 /*******************************************
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1310 * 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
1311 *******************************************/
48497
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Mark Dickinson <dickinsm@gmail.com>
parents: 48364
diff changeset
1312
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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parents: 54232
diff changeset
1313 /* 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
1314 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
1315 ndigits--;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1316 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
1317 x = 0.0;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1318 goto finished;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1319 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1320 if (exp > LONG_MAX/2)
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1321 goto overflow_error;
48497
2bb866d282ba Merged revisions 64974 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
parents: 48364
diff changeset
1322
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1323 /* Adjust exponent for fractional part. */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1324 exp = exp - 4*((long)fdigits);
48497
2bb866d282ba Merged revisions 64974 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
parents: 48364
diff changeset
1325
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1326 /* 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
1327 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
1328 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
1329 top_exp++;
48497
2bb866d282ba Merged revisions 64974 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
parents: 48364
diff changeset
1330
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1331 /* 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
1332 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
1333 x = 0.0;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1334 goto finished;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1335 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1336 if (top_exp > DBL_MAX_EXP)
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1337 goto overflow_error;
48497
2bb866d282ba Merged revisions 64974 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
parents: 48364
diff changeset
1338
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1339 /* 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
1340 This is top_exp - DBL_MANT_DIG unless result is subnormal. */
84022
41a2cbe23349 Reuse Py_MIN and Py_MAX macros: remove duplicate MIN/MAX macros
Victor Stinner <victor.stinner@gmail.com>
parents: 83433
diff changeset
1341 lsb = Py_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
1342
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1343 x = 0.0;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1344 if (exp >= lsb) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1345 /* no rounding required */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1346 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
1347 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
1348 x = ldexp(x, (int)(exp));
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1349 goto finished;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1350 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1351 /* 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
1352 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
1353 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
1354 key_digit = (lsb - exp - 1) / 4;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1355 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
1356 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
1357 digit = HEX_DIGIT(key_digit);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1358 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
1359
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1360 /* 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
1361 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
1362 if ((digit & half_eps) != 0) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1363 round_up = 0;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1364 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
1365 (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
1366 round_up = 1;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1367 else
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1368 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
1369 if (HEX_DIGIT(i) != 0) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1370 round_up = 1;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1371 break;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1372 }
62834
202f31d40389 Style nit.
Mark Dickinson <dickinsm@gmail.com>
parents: 62690
diff changeset
1373 if (round_up) {
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1374 x += 2*half_eps;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1375 if (top_exp == DBL_MAX_EXP &&
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1376 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
1377 /* overflow corner case: pre-rounded value <
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1378 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
1379 goto overflow_error;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1380 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1381 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1382 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
1383
2bb866d282ba Merged revisions 64974 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
parents: 48364
diff changeset
1384 finished:
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1385 /* 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
1386 while (Py_ISSPACE(*s))
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1387 s++;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1388 if (s != s_end)
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1389 goto parse_error;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1390 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
1391 if (result_as_float == NULL)
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1392 return NULL;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1393 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
1394 Py_DECREF(result_as_float);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1395 return result;
48497
2bb866d282ba Merged revisions 64974 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
parents: 48364
diff changeset
1396
2bb866d282ba Merged revisions 64974 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
parents: 48364
diff changeset
1397 overflow_error:
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1398 PyErr_SetString(PyExc_OverflowError,
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1399 "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
1400 return NULL;
48497
2bb866d282ba Merged revisions 64974 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
parents: 48364
diff changeset
1401
2bb866d282ba Merged revisions 64974 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
parents: 48364
diff changeset
1402 parse_error:
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1403 PyErr_SetString(PyExc_ValueError,
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1404 "invalid hexadecimal floating-point string");
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1405 return NULL;
48497
2bb866d282ba Merged revisions 64974 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
parents: 48364
diff changeset
1406
2bb866d282ba Merged revisions 64974 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
parents: 48364
diff changeset
1407 insane_length_error:
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1408 PyErr_SetString(PyExc_ValueError,
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1409 "hexadecimal string too long to convert");
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1410 return NULL;
48497
2bb866d282ba Merged revisions 64974 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
parents: 48364
diff changeset
1411 }
2bb866d282ba Merged revisions 64974 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
parents: 48364
diff changeset
1412
2bb866d282ba Merged revisions 64974 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
parents: 48364
diff changeset
1413 PyDoc_STRVAR(float_fromhex_doc,
2bb866d282ba Merged revisions 64974 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
parents: 48364
diff changeset
1414 "float.fromhex(string) -> float\n\
2bb866d282ba Merged revisions 64974 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
parents: 48364
diff changeset
1415 \n\
2bb866d282ba Merged revisions 64974 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
parents: 48364
diff changeset
1416 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
1417 >>> float.fromhex('0x1.ffffp10')\n\
2bb866d282ba Merged revisions 64974 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
parents: 48364
diff changeset
1418 2047.984375\n\
2bb866d282ba Merged revisions 64974 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
parents: 48364
diff changeset
1419 >>> float.fromhex('-0x1p-1074')\n\
2bb866d282ba Merged revisions 64974 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
parents: 48364
diff changeset
1420 -4.9406564584124654e-324");
2bb866d282ba Merged revisions 64974 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
parents: 48364
diff changeset
1421
2bb866d282ba Merged revisions 64974 via svnmerge from
Mark Dickinson <dickinsm@gmail.com>
parents: 48364
diff changeset
1422
45026
ebfbaa1051e2 Merged revisions 60364-60378 via svnmerge from
Christian Heimes <christian@cheimes.de>
parents: 44943
diff changeset
1423 static PyObject *
45134
bdcf40d1b38e Merged revisions 60481,60485,60489-60520,60523-60527,60530-60533,60535-60538,60540-60551 via svnmerge from
Christian Heimes <christian@cheimes.de>
parents: 45071
diff changeset
1424 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
1425 {
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1426 double self;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1427 double float_part;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1428 int exponent;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1429 int i;
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
1430
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1431 PyObject *prev;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1432 PyObject *py_exponent = NULL;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1433 PyObject *numerator = NULL;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1434 PyObject *denominator = NULL;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1435 PyObject *result_pair = NULL;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1436 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
1437
ebfbaa1051e2 Merged revisions 60364-60378 via svnmerge from
Christian Heimes <christian@cheimes.de>
parents: 44943
diff changeset
1438 #define INPLACE_UPDATE(obj, call) \
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1439 prev = obj; \
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1440 obj = call; \
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1441 Py_DECREF(prev); \
45026
ebfbaa1051e2 Merged revisions 60364-60378 via svnmerge from
Christian Heimes <christian@cheimes.de>
parents: 44943
diff changeset
1442
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1443 CONVERT_TO_DOUBLE(v, self);
45026
ebfbaa1051e2 Merged revisions 60364-60378 via svnmerge from
Christian Heimes <christian@cheimes.de>
parents: 44943
diff changeset
1444
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1445 if (Py_IS_INFINITY(self)) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1446 PyErr_SetString(PyExc_OverflowError,
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1447 "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
1448 return NULL;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1449 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1450 if (Py_IS_NAN(self)) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1451 PyErr_SetString(PyExc_ValueError,
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1452 "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
1453 return NULL;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1454 }
45026
ebfbaa1051e2 Merged revisions 60364-60378 via svnmerge from
Christian Heimes <christian@cheimes.de>
parents: 44943
diff changeset
1455
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1456 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
1457 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
1458 PyFPE_END_PROTECT(float_part);
45026
ebfbaa1051e2 Merged revisions 60364-60378 via svnmerge from
Christian Heimes <christian@cheimes.de>
parents: 44943
diff changeset
1459
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1460 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
1461 float_part *= 2.0;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1462 exponent--;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1463 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1464 /* 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
1465 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
1466 to be truncated by PyLong_FromDouble(). */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1468 numerator = PyLong_FromDouble(float_part);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1469 if (numerator == NULL) goto error;
45026
ebfbaa1051e2 Merged revisions 60364-60378 via svnmerge from
Christian Heimes <christian@cheimes.de>
parents: 44943
diff changeset
1470
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1471 /* fold in 2**exponent */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1472 denominator = PyLong_FromLong(1);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1473 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
1474 if (py_exponent == NULL) goto error;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1475 INPLACE_UPDATE(py_exponent,
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1476 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
1477 if (py_exponent == NULL) goto error;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1478 if (exponent > 0) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1479 INPLACE_UPDATE(numerator,
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1480 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
1481 if (numerator == NULL) goto error;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1482 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1483 else {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1484 Py_DECREF(denominator);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1485 denominator = py_exponent;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1486 py_exponent = NULL;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1487 }
45026
ebfbaa1051e2 Merged revisions 60364-60378 via svnmerge from
Christian Heimes <christian@cheimes.de>
parents: 44943
diff changeset
1488
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1489 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
1490
ebfbaa1051e2 Merged revisions 60364-60378 via svnmerge from
Christian Heimes <christian@cheimes.de>
parents: 44943
diff changeset
1491 #undef INPLACE_UPDATE
ebfbaa1051e2 Merged revisions 60364-60378 via svnmerge from
Christian Heimes <christian@cheimes.de>
parents: 44943
diff changeset
1492 error:
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1493 Py_XDECREF(py_exponent);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1494 Py_XDECREF(denominator);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1495 Py_XDECREF(numerator);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1496 return result_pair;
45026
ebfbaa1051e2 Merged revisions 60364-60378 via svnmerge from
Christian Heimes <christian@cheimes.de>
parents: 44943
diff changeset
1497 }
ebfbaa1051e2 Merged revisions 60364-60378 via svnmerge from
Christian Heimes <christian@cheimes.de>
parents: 44943
diff changeset
1498
ebfbaa1051e2 Merged revisions 60364-60378 via svnmerge from
Christian Heimes <christian@cheimes.de>
parents: 44943
diff changeset
1499 PyDoc_STRVAR(float_as_integer_ratio_doc,
ebfbaa1051e2 Merged revisions 60364-60378 via svnmerge from
Christian Heimes <christian@cheimes.de>
parents: 44943
diff changeset
1500 "float.as_integer_ratio() -> (int, int)\n"
ebfbaa1051e2 Merged revisions 60364-60378 via svnmerge from
Christian Heimes <christian@cheimes.de>
parents: 44943
diff changeset
1501 "\n"
85978
563074ace473 #19069: use imperative mood in float object docstrings. Patch by Marco Buttu.
Ezio Melotti <ezio.melotti@gmail.com>
parents: 85418
diff changeset
1502 "Return a pair of integers, whose ratio is exactly equal to the original\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
1503 "float and with a positive denominator.\n"
85978
563074ace473 #19069: use imperative mood in float object docstrings. Patch by Marco Buttu.
Ezio Melotti <ezio.melotti@gmail.com>
parents: 85418
diff changeset
1504 "Raise 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
1505 "\n"
ebfbaa1051e2 Merged revisions 60364-60378 via svnmerge from
Christian Heimes <christian@cheimes.de>
parents: 44943
diff changeset
1506 ">>> (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
1507 "(10, 1)\n"
45026
ebfbaa1051e2 Merged revisions 60364-60378 via svnmerge from
Christian Heimes <christian@cheimes.de>
parents: 44943
diff changeset
1508 ">>> (0.0).as_integer_ratio()\n"
ebfbaa1051e2 Merged revisions 60364-60378 via svnmerge from
Christian Heimes <christian@cheimes.de>
parents: 44943
diff changeset
1509 "(0, 1)\n"
ebfbaa1051e2 Merged revisions 60364-60378 via svnmerge from
Christian Heimes <christian@cheimes.de>
parents: 44943
diff changeset
1510 ">>> (-.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
1511 "(-1, 4)");
45026
ebfbaa1051e2 Merged revisions 60364-60378 via svnmerge from
Christian Heimes <christian@cheimes.de>
parents: 44943
diff changeset
1512
1049
2ed511171809 Made builtins int(), long(), float(), oct() and hex() more generic.
Guido van Rossum <guido@python.org>
parents: 955
diff changeset
1513
24280
1598a1e473e2 staticforward bites the dust.
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 23832
diff changeset
1514 static PyObject *
19552
6c30d20d27f2 Make int, long and float subclassable.
Guido van Rossum <guido@python.org>
parents: 19457
diff changeset
1515 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
1516
18933
09df3254b49d Merge of descr-branch back into trunk.
Tim Peters <tim.peters@gmail.com>
parents: 18838
diff changeset
1517 static PyObject *
09df3254b49d Merge of descr-branch back into trunk.
Tim Peters <tim.peters@gmail.com>
parents: 18838
diff changeset
1518 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
1519 {
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1520 PyObject *x = Py_False; /* Integer zero */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1521 static char *kwlist[] = {"x", 0};
18933
09df3254b49d Merge of descr-branch back into trunk.
Tim Peters <tim.peters@gmail.com>
parents: 18838
diff changeset
1522
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1523 if (type != &PyFloat_Type)
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1524 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
1525 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
1526 return NULL;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1527 /* 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
1528 PyFloat_FromString. */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1529 if (PyUnicode_CheckExact(x))
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1530 return PyFloat_FromString(x);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1531 return PyNumber_Float(x);
18933
09df3254b49d Merge of descr-branch back into trunk.
Tim Peters <tim.peters@gmail.com>
parents: 18838
diff changeset
1532 }
09df3254b49d Merge of descr-branch back into trunk.
Tim Peters <tim.peters@gmail.com>
parents: 18838
diff changeset
1533
19552
6c30d20d27f2 Make int, long and float subclassable.
Guido van Rossum <guido@python.org>
parents: 19457
diff changeset
1534 /* 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
1535 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
1536 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
1537 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
1538 */
6c30d20d27f2 Make int, long and float subclassable.
Guido van Rossum <guido@python.org>
parents: 19457
diff changeset
1539 static PyObject *
6c30d20d27f2 Make int, long and float subclassable.
Guido van Rossum <guido@python.org>
parents: 19457
diff changeset
1540 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
1541 {
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1542 PyObject *tmp, *newobj;
19552
6c30d20d27f2 Make int, long and float subclassable.
Guido van Rossum <guido@python.org>
parents: 19457
diff changeset
1543
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1544 assert(PyType_IsSubtype(type, &PyFloat_Type));
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1545 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
1546 if (tmp == NULL)
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1547 return NULL;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1548 assert(PyFloat_CheckExact(tmp));
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1549 newobj = type->tp_alloc(type, 0);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1550 if (newobj == NULL) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1551 Py_DECREF(tmp);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1552 return NULL;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1553 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1554 ((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
1555 Py_DECREF(tmp);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1556 return newobj;
19552
6c30d20d27f2 Make int, long and float subclassable.
Guido van Rossum <guido@python.org>
parents: 19457
diff changeset
1557 }
6c30d20d27f2 Make int, long and float subclassable.
Guido van Rossum <guido@python.org>
parents: 19457
diff changeset
1558
27521
17bfd5dbc0f1 Implement appropriate __getnewargs__ for all immutable subclassable builtin
Guido van Rossum <guido@python.org>
parents: 27484
diff changeset
1559 static PyObject *
17bfd5dbc0f1 Implement appropriate __getnewargs__ for all immutable subclassable builtin
Guido van Rossum <guido@python.org>
parents: 27484
diff changeset
1560 float_getnewargs(PyFloatObject *v)
17bfd5dbc0f1 Implement appropriate __getnewargs__ for all immutable subclassable builtin
Guido van Rossum <guido@python.org>
parents: 27484
diff changeset
1561 {
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1562 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
1563 }
17bfd5dbc0f1 Implement appropriate __getnewargs__ for all immutable subclassable builtin
Guido van Rossum <guido@python.org>
parents: 27484
diff changeset
1564
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1565 /* 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
1566
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1567 typedef enum {
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1568 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
1569 } float_format_type;
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1570
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1571 static float_format_type double_format, float_format;
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1572 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
1573
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1574 static PyObject *
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1575 float_getformat(PyTypeObject *v, PyObject* arg)
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1576 {
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1577 char* s;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1578 float_format_type r;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1579
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1580 if (!PyUnicode_Check(arg)) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1581 PyErr_Format(PyExc_TypeError,
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1582 "__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
1583 Py_TYPE(arg)->tp_name);
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 s = _PyUnicode_AsString(arg);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1587 if (s == NULL)
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1588 return NULL;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1589 if (strcmp(s, "double") == 0) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1590 r = double_format;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1591 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1592 else if (strcmp(s, "float") == 0) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1593 r = float_format;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1594 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1595 else {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1596 PyErr_SetString(PyExc_ValueError,
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1597 "__getformat__() argument 1 must be "
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1598 "'double' or 'float'");
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1599 return NULL;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1600 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1601
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1602 switch (r) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1603 case unknown_format:
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1604 return PyUnicode_FromString("unknown");
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1605 case ieee_little_endian_format:
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1606 return PyUnicode_FromString("IEEE, little-endian");
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1607 case ieee_big_endian_format:
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1608 return PyUnicode_FromString("IEEE, big-endian");
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1609 default:
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1610 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
1611 return NULL;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1612 }
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1613 }
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1614
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1615 PyDoc_STRVAR(float_getformat_doc,
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1616 "float.__getformat__(typestr) -> string\n"
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1617 "\n"
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1618 "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
1619 "used in Python's test suite.\n"
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1620 "\n"
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1621 "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
1622 "'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
1623 "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
1624
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1625 static PyObject *
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1626 float_setformat(PyTypeObject *v, PyObject* args)
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1627 {
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1628 char* typestr;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1629 char* format;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1630 float_format_type f;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1631 float_format_type detected;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1632 float_format_type *p;
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 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
1635 return NULL;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1636
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1637 if (strcmp(typestr, "double") == 0) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1638 p = &double_format;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1639 detected = detected_double_format;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1640 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1641 else if (strcmp(typestr, "float") == 0) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1642 p = &float_format;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1643 detected = detected_float_format;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1644 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1645 else {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1646 PyErr_SetString(PyExc_ValueError,
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1647 "__setformat__() argument 1 must "
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1648 "be 'double' or 'float'");
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1649 return NULL;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1650 }
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1651
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1652 if (strcmp(format, "unknown") == 0) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1653 f = unknown_format;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1654 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1655 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
1656 f = ieee_little_endian_format;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1657 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1658 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
1659 f = ieee_big_endian_format;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1660 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1661 else {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1662 PyErr_SetString(PyExc_ValueError,
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1663 "__setformat__() argument 2 must be "
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1664 "'unknown', 'IEEE, little-endian' or "
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1665 "'IEEE, big-endian'");
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1666 return NULL;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1667
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1668 }
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1669
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1670 if (f != unknown_format && f != detected) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1671 PyErr_Format(PyExc_ValueError,
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1672 "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
1673 "detected platform value", typestr);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1674 return NULL;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1675 }
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1676
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1677 *p = f;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1678 Py_RETURN_NONE;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1679 }
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1680
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1681 PyDoc_STRVAR(float_setformat_doc,
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1682 "float.__setformat__(typestr, fmt) -> None\n"
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1683 "\n"
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1684 "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
1685 "used in Python's test suite.\n"
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1686 "\n"
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1687 "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
1688 "'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
1689 "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
1690 "\n"
85978
563074ace473 #19069: use imperative mood in float object docstrings. Patch by Marco Buttu.
Ezio Melotti <ezio.melotti@gmail.com>
parents: 85418
diff changeset
1691 "Override the automatic determination of C-level floating point type.\n"
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1692 "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
1693
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
1694 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
1695 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
1696 {
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1697 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
1698 }
d3a5c796c8ba Changes to long and float by Jeffrey Jasskin to conform to PEP 3141.
Guido van Rossum <guido@python.org>
parents: 42334
diff changeset
1699
42817
5355337709e1 Implementation of PEP 3101, Advanced String Formatting.
Eric Smith <eric@trueblade.com>
parents: 42753
diff changeset
1700 static PyObject *
5355337709e1 Implementation of PEP 3101, Advanced String Formatting.
Eric Smith <eric@trueblade.com>
parents: 42753
diff changeset
1701 float__format__(PyObject *self, PyObject *args)
5355337709e1 Implementation of PEP 3101, Advanced String Formatting.
Eric Smith <eric@trueblade.com>
parents: 42753
diff changeset
1702 {
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1703 PyObject *format_spec;
77223
22b56b0b8619 Issue #14744: Use the new _PyUnicodeWriter internal API to speed up str%args and str.format(args)
Victor Stinner <victor.stinner@gmail.com>
parents: 75993
diff changeset
1704 _PyUnicodeWriter writer;
22b56b0b8619 Issue #14744: Use the new _PyUnicodeWriter internal API to speed up str%args and str.format(args)
Victor Stinner <victor.stinner@gmail.com>
parents: 75993
diff changeset
1705 int ret;
47393
0da27fdf0192 Refactor and clean up str.format() code (and helpers) in advance of optimizations.
Eric Smith <eric@trueblade.com>
parents: 46790
diff changeset
1706
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1707 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
1708 return NULL;
77223
22b56b0b8619 Issue #14744: Use the new _PyUnicodeWriter internal API to speed up str%args and str.format(args)
Victor Stinner <victor.stinner@gmail.com>
parents: 75993
diff changeset
1709
83433
edf029fc9591 Close #17694: Add minimum length to _PyUnicodeWriter
Victor Stinner <victor.stinner@gmail.com>
parents: 81772
diff changeset
1710 _PyUnicodeWriter_Init(&writer);
77223
22b56b0b8619 Issue #14744: Use the new _PyUnicodeWriter internal API to speed up str%args and str.format(args)
Victor Stinner <victor.stinner@gmail.com>
parents: 75993
diff changeset
1711 ret = _PyFloat_FormatAdvancedWriter(
22b56b0b8619 Issue #14744: Use the new _PyUnicodeWriter internal API to speed up str%args and str.format(args)
Victor Stinner <victor.stinner@gmail.com>
parents: 75993
diff changeset
1712 &writer,
22b56b0b8619 Issue #14744: Use the new _PyUnicodeWriter internal API to speed up str%args and str.format(args)
Victor Stinner <victor.stinner@gmail.com>
parents: 75993
diff changeset
1713 self,
22b56b0b8619 Issue #14744: Use the new _PyUnicodeWriter internal API to speed up str%args and str.format(args)
Victor Stinner <victor.stinner@gmail.com>
parents: 75993
diff changeset
1714 format_spec, 0, PyUnicode_GET_LENGTH(format_spec));
22b56b0b8619 Issue #14744: Use the new _PyUnicodeWriter internal API to speed up str%args and str.format(args)
Victor Stinner <victor.stinner@gmail.com>
parents: 75993
diff changeset
1715 if (ret == -1) {
22b56b0b8619 Issue #14744: Use the new _PyUnicodeWriter internal API to speed up str%args and str.format(args)
Victor Stinner <victor.stinner@gmail.com>
parents: 75993
diff changeset
1716 _PyUnicodeWriter_Dealloc(&writer);
22b56b0b8619 Issue #14744: Use the new _PyUnicodeWriter internal API to speed up str%args and str.format(args)
Victor Stinner <victor.stinner@gmail.com>
parents: 75993
diff changeset
1717 return NULL;
22b56b0b8619 Issue #14744: Use the new _PyUnicodeWriter internal API to speed up str%args and str.format(args)
Victor Stinner <victor.stinner@gmail.com>
parents: 75993
diff changeset
1718 }
22b56b0b8619 Issue #14744: Use the new _PyUnicodeWriter internal API to speed up str%args and str.format(args)
Victor Stinner <victor.stinner@gmail.com>
parents: 75993
diff changeset
1719 return _PyUnicodeWriter_Finish(&writer);
42817
5355337709e1 Implementation of PEP 3101, Advanced String Formatting.
Eric Smith <eric@trueblade.com>
parents: 42753
diff changeset
1720 }
5355337709e1 Implementation of PEP 3101, Advanced String Formatting.
Eric Smith <eric@trueblade.com>
parents: 42753
diff changeset
1721
5355337709e1 Implementation of PEP 3101, Advanced String Formatting.
Eric Smith <eric@trueblade.com>
parents: 42753
diff changeset
1722 PyDoc_STRVAR(float__format__doc,
5355337709e1 Implementation of PEP 3101, Advanced String Formatting.
Eric Smith <eric@trueblade.com>
parents: 42753
diff changeset
1723 "float.__format__(format_spec) -> string\n"
5355337709e1 Implementation of PEP 3101, Advanced String Formatting.
Eric Smith <eric@trueblade.com>
parents: 42753
diff changeset
1724 "\n"
5355337709e1 Implementation of PEP 3101, Advanced String Formatting.
Eric Smith <eric@trueblade.com>
parents: 42753
diff changeset
1725 "Formats the float according to format_spec.");
5355337709e1 Implementation of PEP 3101, Advanced String Formatting.
Eric Smith <eric@trueblade.com>
parents: 42753
diff changeset
1726
5355337709e1 Implementation of PEP 3101, Advanced String Formatting.
Eric Smith <eric@trueblade.com>
parents: 42753
diff changeset
1727
27521
17bfd5dbc0f1 Implement appropriate __getnewargs__ for all immutable subclassable builtin
Guido van Rossum <guido@python.org>
parents: 27484
diff changeset
1728 static PyMethodDef float_methods[] = {
61467
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1729 {"conjugate", (PyCFunction)float_float, METH_NOARGS,
85978
563074ace473 #19069: use imperative mood in float object docstrings. Patch by Marco Buttu.
Ezio Melotti <ezio.melotti@gmail.com>
parents: 85418
diff changeset
1730 "Return self, the complex conjugate of any float."},
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1731 {"__trunc__", (PyCFunction)float_trunc, METH_NOARGS,
85978
563074ace473 #19069: use imperative mood in float object docstrings. Patch by Marco Buttu.
Ezio Melotti <ezio.melotti@gmail.com>
parents: 85418
diff changeset
1732 "Return the Integral closest to x between 0 and x."},
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1733 {"__round__", (PyCFunction)float_round, METH_VARARGS,
85978
563074ace473 #19069: use imperative mood in float object docstrings. Patch by Marco Buttu.
Ezio Melotti <ezio.melotti@gmail.com>
parents: 85418
diff changeset
1734 "Return the Integral closest to x, rounding half toward even.\n"
563074ace473 #19069: use imperative mood in float object docstrings. Patch by Marco Buttu.
Ezio Melotti <ezio.melotti@gmail.com>
parents: 85418
diff changeset
1735 "When an argument is passed, work like built-in round(x, ndigits)."},
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1736 {"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
1737 float_as_integer_ratio_doc},
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1738 {"fromhex", (PyCFunction)float_fromhex,
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1739 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
1740 {"hex", (PyCFunction)float_hex,
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1741 METH_NOARGS, float_hex_doc},
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1742 {"is_integer", (PyCFunction)float_is_integer, METH_NOARGS,
85978
563074ace473 #19069: use imperative mood in float object docstrings. Patch by Marco Buttu.
Ezio Melotti <ezio.melotti@gmail.com>
parents: 85418
diff changeset
1743 "Return 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
1744 #if 0
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1745 {"is_inf", (PyCFunction)float_is_inf, METH_NOARGS,
85978
563074ace473 #19069: use imperative mood in float object docstrings. Patch by Marco Buttu.
Ezio Melotti <ezio.melotti@gmail.com>
parents: 85418
diff changeset
1746 "Return True if the float is positive or negative infinite."},
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1747 {"is_finite", (PyCFunction)float_is_finite, METH_NOARGS,
85978
563074ace473 #19069: use imperative mood in float object docstrings. Patch by Marco Buttu.
Ezio Melotti <ezio.melotti@gmail.com>
parents: 85418
diff changeset
1748 "Return True if the float is finite, neither infinite nor NaN."},
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1749 {"is_nan", (PyCFunction)float_is_nan, METH_NOARGS,
85978
563074ace473 #19069: use imperative mood in float object docstrings. Patch by Marco Buttu.
Ezio Melotti <ezio.melotti@gmail.com>
parents: 85418
diff changeset
1750 "Return 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
1751 #endif
61467
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1752 {"__getnewargs__", (PyCFunction)float_getnewargs, METH_NOARGS},
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1753 {"__getformat__", (PyCFunction)float_getformat,
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1754 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
1755 {"__setformat__", (PyCFunction)float_setformat,
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1756 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
1757 {"__format__", (PyCFunction)float__format__,
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1758 METH_VARARGS, float__format__doc},
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1759 {NULL, NULL} /* sentinel */
27521
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Guido van Rossum <guido@python.org>
parents: 27484
diff changeset
1760 };
17bfd5dbc0f1 Implement appropriate __getnewargs__ for all immutable subclassable builtin
Guido van Rossum <guido@python.org>
parents: 27484
diff changeset
1761
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
1762 static PyGetSetDef float_getset[] = {
61467
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1763 {"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
1764 (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
1765 "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
1766 NULL},
61467
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1767 {"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
1768 (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
1769 "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
1770 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
1771 {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
1772 };
d3a5c796c8ba Changes to long and float by Jeffrey Jasskin to conform to PEP 3141.
Guido van Rossum <guido@python.org>
parents: 42334
diff changeset
1773
23832
ed1ba37a46b7 Patch #568124: Add doc string macros.
Martin v. Löwis <martin@v.loewis.de>
parents: 23344
diff changeset
1774 PyDoc_STRVAR(float_doc,
18933
09df3254b49d Merge of descr-branch back into trunk.
Tim Peters <tim.peters@gmail.com>
parents: 18838
diff changeset
1775 "float(x) -> floating point number\n\
09df3254b49d Merge of descr-branch back into trunk.
Tim Peters <tim.peters@gmail.com>
parents: 18838
diff changeset
1776 \n\
23832
ed1ba37a46b7 Patch #568124: Add doc string macros.
Martin v. Löwis <martin@v.loewis.de>
parents: 23344
diff changeset
1777 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
1778
09df3254b49d Merge of descr-branch back into trunk.
Tim Peters <tim.peters@gmail.com>
parents: 18838
diff changeset
1779
5396
d1447950fa04 Quickly renamed the last directory.
Guido van Rossum <guido@python.org>
parents: 5197
diff changeset
1780 static PyNumberMethods float_as_number = {
61467
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1781 float_add, /*nb_add*/
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1782 float_sub, /*nb_subtract*/
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1783 float_mul, /*nb_multiply*/
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1784 float_rem, /*nb_remainder*/
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1785 float_divmod, /*nb_divmod*/
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1786 float_pow, /*nb_power*/
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1787 (unaryfunc)float_neg, /*nb_negative*/
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1788 (unaryfunc)float_float, /*nb_positive*/
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1789 (unaryfunc)float_abs, /*nb_absolute*/
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1790 (inquiry)float_bool, /*nb_bool*/
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1791 0, /*nb_invert*/
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1792 0, /*nb_lshift*/
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1793 0, /*nb_rshift*/
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1794 0, /*nb_and*/
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1795 0, /*nb_xor*/
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1796 0, /*nb_or*/
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1797 float_trunc, /*nb_int*/
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1798 0, /*nb_reserved*/
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1799 float_float, /*nb_float*/
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1800 0, /* nb_inplace_add */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1801 0, /* nb_inplace_subtract */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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parents: 54232
diff changeset
1802 0, /* nb_inplace_multiply */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1803 0, /* nb_inplace_remainder */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1804 0, /* nb_inplace_power */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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parents: 54232
diff changeset
1805 0, /* nb_inplace_lshift */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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parents: 54232
diff changeset
1806 0, /* nb_inplace_rshift */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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diff changeset
1807 0, /* nb_inplace_and */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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parents: 54232
diff changeset
1808 0, /* nb_inplace_xor */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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parents: 54232
diff changeset
1809 0, /* nb_inplace_or */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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parents: 54232
diff changeset
1810 float_floor_div, /* nb_floor_divide */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1811 float_div, /* nb_true_divide */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1812 0, /* nb_inplace_floor_divide */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1813 0, /* nb_inplace_true_divide */
6
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
1814 };
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
1815
5396
d1447950fa04 Quickly renamed the last directory.
Guido van Rossum <guido@python.org>
parents: 5197
diff changeset
1816 PyTypeObject PyFloat_Type = {
61467
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parents: 54232
diff changeset
1817 PyVarObject_HEAD_INIT(&PyType_Type, 0)
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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parents: 54232
diff changeset
1818 "float",
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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diff changeset
1819 sizeof(PyFloatObject),
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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diff changeset
1820 0,
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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diff changeset
1821 (destructor)float_dealloc, /* tp_dealloc */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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diff changeset
1822 0, /* tp_print */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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diff changeset
1823 0, /* tp_getattr */
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diff changeset
1824 0, /* tp_setattr */
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diff changeset
1825 0, /* tp_reserved */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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diff changeset
1826 (reprfunc)float_repr, /* tp_repr */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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parents: 54232
diff changeset
1827 &float_as_number, /* tp_as_number */
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parents: 54232
diff changeset
1828 0, /* tp_as_sequence */
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parents: 54232
diff changeset
1829 0, /* tp_as_mapping */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1830 (hashfunc)float_hash, /* tp_hash */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1831 0, /* tp_call */
63750
eafe07d40eb7 Issue #9337: Make float.__str__ identical to float.__repr__.
Mark Dickinson <dickinsm@gmail.com>
parents: 62834
diff changeset
1832 (reprfunc)float_repr, /* tp_str */
61467
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parents: 54232
diff changeset
1833 PyObject_GenericGetAttr, /* tp_getattro */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1834 0, /* tp_setattro */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1835 0, /* tp_as_buffer */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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parents: 54232
diff changeset
1836 Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE, /* tp_flags */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1837 float_doc, /* tp_doc */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1838 0, /* tp_traverse */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1839 0, /* tp_clear */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1840 float_richcompare, /* tp_richcompare */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1841 0, /* tp_weaklistoffset */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1842 0, /* tp_iter */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1843 0, /* tp_iternext */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1844 float_methods, /* tp_methods */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1845 0, /* tp_members */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1846 float_getset, /* tp_getset */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1847 0, /* tp_base */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1848 0, /* tp_dict */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1849 0, /* tp_descr_get */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1850 0, /* tp_descr_set */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1851 0, /* tp_dictoffset */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1852 0, /* tp_init */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1853 0, /* tp_alloc */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1854 float_new, /* tp_new */
6
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
1855 };
5936
80d24364b932 Added _Fini() routines to free up some memory
Guido van Rossum <guido@python.org>
parents: 5504
diff changeset
1856
84793
fc718c177ee6 Issue #18520: Add a new PyStructSequence_InitType2() function, same than
Victor Stinner <victor.stinner@gmail.com>
parents: 84022
diff changeset
1857 int
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1858 _PyFloat_Init(void)
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1859 {
61467
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Antoine Pitrou <solipsis@pitrou.net>
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diff changeset
1860 /* We attempt to determine if this machine is using IEEE
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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parents: 54232
diff changeset
1861 floating point formats by peering at the bits of some
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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parents: 54232
diff changeset
1862 carefully chosen values. If it looks like we are on an
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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parents: 54232
diff changeset
1863 IEEE platform, the float packing/unpacking routines can
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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parents: 54232
diff changeset
1864 just copy bits, if not they resort to arithmetic & shifts
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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parents: 54232
diff changeset
1865 and masks. The shifts & masks approach works on all finite
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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parents: 54232
diff changeset
1866 values, but what happens to infinities, NaNs and signed
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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parents: 54232
diff changeset
1867 zeroes on packing is an accident, and attempting to unpack
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1868 a NaN or an infinity will raise an exception.
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1869
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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diff changeset
1870 Note that if we're on some whacked-out platform which uses
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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parents: 54232
diff changeset
1871 IEEE formats but isn't strictly little-endian or big-
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1872 endian, we will fall back to the portable shifts & masks
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1873 method. */
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1874
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1875 #if SIZEOF_DOUBLE == 8
61467
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parents: 54232
diff changeset
1876 {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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parents: 54232
diff changeset
1877 double x = 9006104071832581.0;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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parents: 54232
diff changeset
1878 if (memcmp(&x, "\x43\x3f\xff\x01\x02\x03\x04\x05", 8) == 0)
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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parents: 54232
diff changeset
1879 detected_double_format = ieee_big_endian_format;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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parents: 54232
diff changeset
1880 else if (memcmp(&x, "\x05\x04\x03\x02\x01\xff\x3f\x43", 8) == 0)
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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diff changeset
1881 detected_double_format = ieee_little_endian_format;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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parents: 54232
diff changeset
1882 else
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diff changeset
1883 detected_double_format = unknown_format;
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parents: 54232
diff changeset
1884 }
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1885 #else
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diff changeset
1886 detected_double_format = unknown_format;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1887 #endif
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1888
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1889 #if SIZEOF_FLOAT == 4
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diff changeset
1890 {
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parents: 54232
diff changeset
1891 float y = 16711938.0;
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diff changeset
1892 if (memcmp(&y, "\x4b\x7f\x01\x02", 4) == 0)
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diff changeset
1893 detected_float_format = ieee_big_endian_format;
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diff changeset
1894 else if (memcmp(&y, "\x02\x01\x7f\x4b", 4) == 0)
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1895 detected_float_format = ieee_little_endian_format;
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diff changeset
1896 else
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1897 detected_float_format = unknown_format;
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1898 }
34972
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Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1899 #else
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1900 detected_float_format = unknown_format;
34972
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Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1901 #endif
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1902
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1903 double_format = detected_double_format;
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1904 float_format = detected_float_format;
44268
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1905
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diff changeset
1906 /* Init float info */
84793
fc718c177ee6 Issue #18520: Add a new PyStructSequence_InitType2() function, same than
Victor Stinner <victor.stinner@gmail.com>
parents: 84022
diff changeset
1907 if (FloatInfoType.tp_name == NULL) {
fc718c177ee6 Issue #18520: Add a new PyStructSequence_InitType2() function, same than
Victor Stinner <victor.stinner@gmail.com>
parents: 84022
diff changeset
1908 if (PyStructSequence_InitType2(&FloatInfoType, &floatinfo_desc) < 0)
fc718c177ee6 Issue #18520: Add a new PyStructSequence_InitType2() function, same than
Victor Stinner <victor.stinner@gmail.com>
parents: 84022
diff changeset
1909 return 0;
fc718c177ee6 Issue #18520: Add a new PyStructSequence_InitType2() function, same than
Victor Stinner <victor.stinner@gmail.com>
parents: 84022
diff changeset
1910 }
fc718c177ee6 Issue #18520: Add a new PyStructSequence_InitType2() function, same than
Victor Stinner <victor.stinner@gmail.com>
parents: 84022
diff changeset
1911 return 1;
34972
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Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1912 }
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1913
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1914 int
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1915 PyFloat_ClearFreeList(void)
5936
80d24364b932 Added _Fini() routines to free up some memory
Guido van Rossum <guido@python.org>
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diff changeset
1916 {
75993
37ebe64d39d2 Issue #14435: Remove special block allocation code from floatobject.c
Kristján Valur Jónsson <kristjan@ccpgames.com>
parents: 74663
diff changeset
1917 PyFloatObject *f = free_list, *next;
37ebe64d39d2 Issue #14435: Remove special block allocation code from floatobject.c
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diff changeset
1918 int i = numfree;
37ebe64d39d2 Issue #14435: Remove special block allocation code from floatobject.c
Kristján Valur Jónsson <kristjan@ccpgames.com>
parents: 74663
diff changeset
1919 while (f) {
37ebe64d39d2 Issue #14435: Remove special block allocation code from floatobject.c
Kristján Valur Jónsson <kristjan@ccpgames.com>
parents: 74663
diff changeset
1920 next = (PyFloatObject*) Py_TYPE(f);
37ebe64d39d2 Issue #14435: Remove special block allocation code from floatobject.c
Kristján Valur Jónsson <kristjan@ccpgames.com>
parents: 74663
diff changeset
1921 PyObject_FREE(f);
37ebe64d39d2 Issue #14435: Remove special block allocation code from floatobject.c
Kristján Valur Jónsson <kristjan@ccpgames.com>
parents: 74663
diff changeset
1922 f = next;
37ebe64d39d2 Issue #14435: Remove special block allocation code from floatobject.c
Kristján Valur Jónsson <kristjan@ccpgames.com>
parents: 74663
diff changeset
1923 }
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diff changeset
1924 free_list = NULL;
75993
37ebe64d39d2 Issue #14435: Remove special block allocation code from floatobject.c
Kristján Valur Jónsson <kristjan@ccpgames.com>
parents: 74663
diff changeset
1925 numfree = 0;
37ebe64d39d2 Issue #14435: Remove special block allocation code from floatobject.c
Kristján Valur Jónsson <kristjan@ccpgames.com>
parents: 74663
diff changeset
1926 return i;
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parents: 45134
diff changeset
1927 }
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1928
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1929 void
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1930 PyFloat_Fini(void)
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1931 {
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Kristján Valur Jónsson <kristjan@ccpgames.com>
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diff changeset
1932 (void)PyFloat_ClearFreeList();
5936
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Guido van Rossum <guido@python.org>
parents: 5504
diff changeset
1933 }
28335
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Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
1934
77577
d63a80abfbec Issue #14785: Add sys._debugmallocstats() to help debug low-level memory allocation issues
David Malcolm <dmalcolm@redhat.com>
parents: 77223
diff changeset
1935 /* Print summary info about the state of the optimized allocator */
d63a80abfbec Issue #14785: Add sys._debugmallocstats() to help debug low-level memory allocation issues
David Malcolm <dmalcolm@redhat.com>
parents: 77223
diff changeset
1936 void
d63a80abfbec Issue #14785: Add sys._debugmallocstats() to help debug low-level memory allocation issues
David Malcolm <dmalcolm@redhat.com>
parents: 77223
diff changeset
1937 _PyFloat_DebugMallocStats(FILE *out)
d63a80abfbec Issue #14785: Add sys._debugmallocstats() to help debug low-level memory allocation issues
David Malcolm <dmalcolm@redhat.com>
parents: 77223
diff changeset
1938 {
d63a80abfbec Issue #14785: Add sys._debugmallocstats() to help debug low-level memory allocation issues
David Malcolm <dmalcolm@redhat.com>
parents: 77223
diff changeset
1939 _PyDebugAllocatorStats(out,
d63a80abfbec Issue #14785: Add sys._debugmallocstats() to help debug low-level memory allocation issues
David Malcolm <dmalcolm@redhat.com>
parents: 77223
diff changeset
1940 "free PyFloatObject",
d63a80abfbec Issue #14785: Add sys._debugmallocstats() to help debug low-level memory allocation issues
David Malcolm <dmalcolm@redhat.com>
parents: 77223
diff changeset
1941 numfree, sizeof(PyFloatObject));
d63a80abfbec Issue #14785: Add sys._debugmallocstats() to help debug low-level memory allocation issues
David Malcolm <dmalcolm@redhat.com>
parents: 77223
diff changeset
1942 }
d63a80abfbec Issue #14785: Add sys._debugmallocstats() to help debug low-level memory allocation issues
David Malcolm <dmalcolm@redhat.com>
parents: 77223
diff changeset
1943
d63a80abfbec Issue #14785: Add sys._debugmallocstats() to help debug low-level memory allocation issues
David Malcolm <dmalcolm@redhat.com>
parents: 77223
diff changeset
1944
28335
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
1945 /*----------------------------------------------------------------------------
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
1946 * _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
1947 */
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
1948 int
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
1949 _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
1950 {
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1951 if (float_format == unknown_format) {
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diff changeset
1952 unsigned char sign;
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diff changeset
1953 int e;
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diff changeset
1954 double f;
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diff changeset
1955 unsigned int fbits;
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diff changeset
1956 int incr = 1;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1957
61467
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diff changeset
1958 if (le) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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diff changeset
1959 p += 3;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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diff changeset
1960 incr = -1;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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diff changeset
1961 }
28335
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
1962
61467
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parents: 54232
diff changeset
1963 if (x < 0) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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parents: 54232
diff changeset
1964 sign = 1;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1965 x = -x;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1966 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
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diff changeset
1967 else
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1968 sign = 0;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1969
61467
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1970 f = frexp(x, &e);
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
1971
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
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diff changeset
1972 /* 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
1973 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
1974 f *= 2.0;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1975 e--;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1976 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1977 else if (f == 0.0)
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1978 e = 0;
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Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1979 else {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1980 PyErr_SetString(PyExc_SystemError,
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1981 "frexp() result out of range");
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1982 return -1;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1983 }
28335
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
1984
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1985 if (e >= 128)
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1986 goto Overflow;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1987 else if (e < -126) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1988 /* Gradual underflow */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1989 f = ldexp(f, 126 + e);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1990 e = 0;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1991 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1992 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
1993 e += 127;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1994 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
1995 }
28335
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
1996
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1997 f *= 8388608.0; /* 2**23 */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
1998 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
1999 assert(fbits <= 8388608);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2000 if (fbits >> 23) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2001 /* 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
2002 fbits = 0;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2003 ++e;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2004 if (e >= 255)
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2005 goto Overflow;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2006 }
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2007
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2008 /* First byte */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2009 *p = (sign << 7) | (e >> 1);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2010 p += incr;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2011
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2012 /* Second byte */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2013 *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
2014 p += incr;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2015
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2016 /* Third byte */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2017 *p = (fbits >> 8) & 0xFF;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2018 p += incr;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2019
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2020 /* Fourth byte */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2021 *p = fbits & 0xFF;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2022
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2023 /* Done */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2024 return 0;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2025
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2026 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2027 else {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2028 float y = (float)x;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2029 const char *s = (char*)&y;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2030 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
2031
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2032 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
2033 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
2034
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2035 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
2036 || (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
2037 p += 3;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2038 incr = -1;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2039 }
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
2040
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2041 for (i = 0; i < 4; i++) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2042 *p = *s++;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2043 p += incr;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2044 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2045 return 0;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2046 }
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
2047 Overflow:
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2048 PyErr_SetString(PyExc_OverflowError,
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2049 "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
2050 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
2051 }
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2052
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2053 int
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2054 _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
2055 {
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2056 if (double_format == unknown_format) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2057 unsigned char sign;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2058 int e;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2059 double f;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2060 unsigned int fhi, flo;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2061 int incr = 1;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2062
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2063 if (le) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2064 p += 7;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2065 incr = -1;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2066 }
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2067
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2068 if (x < 0) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2069 sign = 1;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2070 x = -x;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2071 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2072 else
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2073 sign = 0;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2074
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2075 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
2076
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2077 /* 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
2078 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
2079 f *= 2.0;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2080 e--;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2081 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2082 else if (f == 0.0)
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2083 e = 0;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2084 else {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2085 PyErr_SetString(PyExc_SystemError,
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2086 "frexp() result out of range");
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2087 return -1;
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 if (e >= 1024)
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2091 goto Overflow;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2092 else if (e < -1022) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2093 /* Gradual underflow */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2094 f = ldexp(f, 1022 + e);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2095 e = 0;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2096 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2097 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
2098 e += 1023;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2099 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
2100 }
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 /* 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
2103 f *= 268435456.0; /* 2**28 */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2104 fhi = (unsigned int)f; /* Truncate */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2105 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
2106
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2107 f -= (double)fhi;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2108 f *= 16777216.0; /* 2**24 */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2109 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
2110 assert(flo <= 16777216);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2111 if (flo >> 24) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2112 /* 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
2113 flo = 0;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2114 ++fhi;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2115 if (fhi >> 28) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2116 /* 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
2117 fhi = 0;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2118 ++e;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2119 if (e >= 2047)
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2120 goto Overflow;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2121 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2122 }
28335
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2123
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2124 /* First byte */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2125 *p = (sign << 7) | (e >> 4);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2126 p += incr;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2127
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2128 /* Second byte */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2129 *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
2130 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
2131
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2132 /* Third byte */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2133 *p = (fhi >> 16) & 0xFF;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2134 p += incr;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2135
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2136 /* Fourth byte */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2137 *p = (fhi >> 8) & 0xFF;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2138 p += incr;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2139
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2140 /* Fifth byte */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2141 *p = fhi & 0xFF;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2142 p += incr;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2143
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2144 /* Sixth byte */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2145 *p = (flo >> 16) & 0xFF;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2146 p += incr;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2147
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2148 /* Seventh byte */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2149 *p = (flo >> 8) & 0xFF;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2150 p += incr;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2151
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2152 /* Eighth byte */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2153 *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
2154 /* p += incr; */
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2155
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2156 /* Done */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2157 return 0;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2158
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2159 Overflow:
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2160 PyErr_SetString(PyExc_OverflowError,
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2161 "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
2162 return -1;
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 {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2165 const char *s = (char*)&x;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2166 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
2167
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2168 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
2169 || (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
2170 p += 7;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2171 incr = -1;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2172 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2173
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2174 for (i = 0; i < 8; i++) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2175 *p = *s++;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2176 p += incr;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2177 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2178 return 0;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2179 }
28335
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2180 }
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2181
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2182 double
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2183 _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
2184 {
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2185 if (float_format == unknown_format) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2186 unsigned char sign;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2187 int e;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2188 unsigned int f;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2189 double x;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2190 int incr = 1;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2191
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2192 if (le) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2193 p += 3;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2194 incr = -1;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2195 }
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2196
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2197 /* First byte */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2198 sign = (*p >> 7) & 1;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2199 e = (*p & 0x7F) << 1;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2200 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
2201
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2202 /* Second byte */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2203 e |= (*p >> 7) & 1;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2204 f = (*p & 0x7F) << 16;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2205 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
2206
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2207 if (e == 255) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2208 PyErr_SetString(
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2209 PyExc_ValueError,
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2210 "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
2211 "on non-IEEE platform");
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2212 return -1;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2213 }
28335
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2214
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2215 /* Third byte */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2216 f |= *p << 8;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2217 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
2218
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2219 /* Fourth byte */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2220 f |= *p;
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 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
2223
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2224 /* 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
2225 if (e == 0)
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2226 e = -126;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2227 else {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2228 x += 1.0;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2229 e -= 127;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2230 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2231 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
2232
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2233 if (sign)
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2234 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
2235
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2236 return x;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2237 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2238 else {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2239 float x;
35987
8eda1a58a490 Fix bug
Michael W. Hudson <mwh@python.net>
parents: 35178
diff changeset
2240
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2241 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
2242 || (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
2243 char buf[4];
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2244 char *d = &buf[3];
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2245 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
2246
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2247 for (i = 0; i < 4; i++) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2248 *d-- = *p++;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2249 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2250 memcpy(&x, buf, 4);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2251 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2252 else {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2253 memcpy(&x, p, 4);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2254 }
35987
8eda1a58a490 Fix bug
Michael W. Hudson <mwh@python.net>
parents: 35178
diff changeset
2255
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2256 return x;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2257 }
28335
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2258 }
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2259
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2260 double
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2261 _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
2262 {
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2263 if (double_format == unknown_format) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2264 unsigned char sign;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2265 int e;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2266 unsigned int fhi, flo;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2267 double x;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2268 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
2269
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2270 if (le) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2271 p += 7;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2272 incr = -1;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2273 }
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2274
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2275 /* First byte */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2276 sign = (*p >> 7) & 1;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2277 e = (*p & 0x7F) << 4;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2278
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2279 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
2280
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2281 /* Second byte */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2282 e |= (*p >> 4) & 0xF;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2283 fhi = (*p & 0xF) << 24;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2284 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
2285
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2286 if (e == 2047) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2287 PyErr_SetString(
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2288 PyExc_ValueError,
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2289 "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
2290 "on non-IEEE platform");
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2291 return -1.0;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2292 }
28335
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2293
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2294 /* Third byte */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2295 fhi |= *p << 16;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2296 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
2297
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2298 /* Fourth byte */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2299 fhi |= *p << 8;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2300 p += incr;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2301
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2302 /* Fifth byte */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2303 fhi |= *p;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2304 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
2305
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2306 /* Sixth byte */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2307 flo = *p << 16;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2308 p += incr;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2309
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2310 /* Seventh byte */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2311 flo |= *p << 8;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2312 p += incr;
34972
1dd8a0d64432 This is my patch:
Michael W. Hudson <mwh@python.net>
parents: 34931
diff changeset
2313
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2314 /* Eighth byte */
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2315 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
2316
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2317 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
2318 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
2319
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2320 if (e == 0)
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2321 e = -1022;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2322 else {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2323 x += 1.0;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2324 e -= 1023;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2325 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2326 x = ldexp(x, e);
28335
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2327
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2328 if (sign)
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2329 x = -x;
28335
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2330
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2331 return x;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2332 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2333 else {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2334 double x;
35987
8eda1a58a490 Fix bug
Michael W. Hudson <mwh@python.net>
parents: 35178
diff changeset
2335
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2336 if ((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
2337 || (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
2338 char buf[8];
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2339 char *d = &buf[7];
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2340 int i;
35987
8eda1a58a490 Fix bug
Michael W. Hudson <mwh@python.net>
parents: 35178
diff changeset
2341
61467
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2342 for (i = 0; i < 8; i++) {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2343 *d-- = *p++;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2344 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2345 memcpy(&x, buf, 8);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2346 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2347 else {
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2348 memcpy(&x, p, 8);
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2349 }
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2350
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2351 return x;
f197407bdba2 Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 54232
diff changeset
2352 }
28335
70003b0cb837 New private API functions _PyFloat_{Pack,Unpack}(4,8}. This is a
Tim Peters <tim.peters@gmail.com>
parents: 27521
diff changeset
2353 }