Mercurial > cpython-lru_cache-weakref

annotate Objects/floatobject.c @ 5792:dffabc620e4e legacy-trunk

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Tweak re_tests and test_re to differentiate between groups that have no value and groups that are out of bounds.
author Guido van Rossum <guido@python.org>
date Tue, 15 Jul 1997 15:49:52 +0000
parents c88b9b868995
children 80d24364b932
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1 /***********************************************************
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2 Copyright 1991-1995 by Stichting Mathematisch Centrum, Amsterdam,
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3 The Netherlands.
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4
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5 All Rights Reserved
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6
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7 Permission to use, copy, modify, and distribute this software and its
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8 documentation for any purpose and without fee is hereby granted,
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9 provided that the above copyright notice appear in all copies and that
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10 both that copyright notice and this permission notice appear in
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11 supporting documentation, and that the names of Stichting Mathematisch
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12 Centrum or CWI or Corporation for National Research Initiatives or
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13 CNRI not be used in advertising or publicity pertaining to
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14 distribution of the software without specific, written prior
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15 permission.
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16
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17 While CWI is the initial source for this software, a modified version
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18 is made available by the Corporation for National Research Initiatives
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19 (CNRI) at the Internet address ftp://ftp.python.org.
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20
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21 STICHTING MATHEMATISCH CENTRUM AND CNRI DISCLAIM ALL WARRANTIES WITH
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22 REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF
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23 MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH
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24 CENTRUM OR CNRI BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL
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25 DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
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26 PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
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27 TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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28 PERFORMANCE OF THIS SOFTWARE.
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29
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30 ******************************************************************/
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31
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32 /* Float object implementation */
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33
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34 /* XXX There should be overflow checks here, but it's hard to check
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35 for any kind of float exception without losing portability. */
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36
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37 #include "Python.h"
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38
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39 #include <ctype.h>
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40 #include "mymath.h"
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41
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42 #ifdef i860
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43 /* Cray APP has bogus definition of HUGE_VAL in <math.h> */
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44 #undef HUGE_VAL
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45 #endif
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46
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47 #if defined(HUGE_VAL) && !defined(CHECK)
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48 #define CHECK(x) if (errno != 0) ; \
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49 else if (-HUGE_VAL <= (x) && (x) <= HUGE_VAL) ; \
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50 else errno = ERANGE
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51 #endif
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52
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53 #ifndef CHECK
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54 #define CHECK(x) /* Don't know how to check */
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55 #endif
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56
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57 #ifdef HAVE_LIMITS_H
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58 #include <limits.h>
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59 #endif
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60
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61 #ifndef LONG_MAX
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62 #define LONG_MAX 0X7FFFFFFFL
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63 #endif
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64
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65 #ifndef LONG_MIN
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66 #define LONG_MIN (-LONG_MAX-1)
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67 #endif
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68
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69 #ifdef __NeXT__
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70 #ifdef __sparc__
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71 /*
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72 * This works around a bug in the NS/Sparc 3.3 pre-release
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73 * limits.h header file.
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74 * 10-Feb-1995 bwarsaw@cnri.reston.va.us
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75 */
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76 #undef LONG_MIN
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77 #define LONG_MIN (-LONG_MAX-1)
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78 #endif
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79 #endif
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80
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81 #if !defined(__STDC__) && !defined(macintosh)
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82 extern double fmod Py_PROTO((double, double));
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83 extern double pow Py_PROTO((double, double));
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84 #endif
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85
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86 /* Special free list -- see comments for same code in intobject.c. */
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87 static PyFloatObject *free_list = NULL;
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88 #define BLOCK_SIZE 1000 /* 1K less typical malloc overhead */
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89 #define N_FLOATOBJECTS (BLOCK_SIZE / sizeof(PyFloatObject))
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90
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91 static PyFloatObject *
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92 fill_free_list()
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93 {
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94 PyFloatObject *p, *q;
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95 p = PyMem_NEW(PyFloatObject, N_FLOATOBJECTS);
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96 if (p == NULL)
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97 return (PyFloatObject *)PyErr_NoMemory();
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98 q = p + N_FLOATOBJECTS;
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99 while (--q > p)
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100 *(PyFloatObject **)q = q-1;
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101 *(PyFloatObject **)q = NULL;
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102 return p + N_FLOATOBJECTS - 1;
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103 }
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104
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105 PyObject *
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106 #ifdef __SC__
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107 PyFloat_FromDouble(double fval)
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108 #else
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109 PyFloat_FromDouble(fval)
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110 double fval;
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111 #endif
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112 {
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113 register PyFloatObject *op;
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114 if (free_list == NULL) {
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115 if ((free_list = fill_free_list()) == NULL)
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116 return NULL;
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117 }
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118 op = free_list;
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119 free_list = *(PyFloatObject **)free_list;
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120 op->ob_type = &PyFloat_Type;
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121 op->ob_fval = fval;
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122 _Py_NewReference(op);
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123 return (PyObject *) op;
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124 }
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125
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126 static void
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127 float_dealloc(op)
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128 PyFloatObject *op;
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129 {
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130 *(PyFloatObject **)op = free_list;
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131 free_list = op;
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132 }
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133
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134 double
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135 PyFloat_AsDouble(op)
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136 PyObject *op;
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137 {
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138 PyNumberMethods *nb;
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139 PyFloatObject *fo;
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140 double val;
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141
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142 if (op && PyFloat_Check(op))
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143 return PyFloat_AS_DOUBLE((PyFloatObject*) op);
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144
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145 if (op == NULL || (nb = op->ob_type->tp_as_number) == NULL ||
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146 nb->nb_float == NULL) {
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147 PyErr_BadArgument();
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148 return -1;
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149 }
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150
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151 fo = (PyFloatObject*) (*nb->nb_float) (op);
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152 if (fo == NULL)
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153 return -1;
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154 if (!PyFloat_Check(fo)) {
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155 PyErr_SetString(PyExc_TypeError,
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156 "nb_float should return float object");
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157 return -1;
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158 }
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159
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160 val = PyFloat_AS_DOUBLE(fo);
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161 Py_DECREF(fo);
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162
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163 return val;
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164 }
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165
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166 /* Methods */
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167
268
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168 void
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169 PyFloat_AsString(buf, v)
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170 char *buf;
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171 PyFloatObject *v;
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172 {
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173 register char *cp;
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174 /* Subroutine for float_repr and float_print.
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175 We want float numbers to be recognizable as such,
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176 i.e., they should contain a decimal point or an exponent.
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177 However, %g may print the number as an integer;
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178 in such cases, we append ".0" to the string. */
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179 sprintf(buf, "%.12g", v->ob_fval);
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180 cp = buf;
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181 if (*cp == '-')
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182 cp++;
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183 for (; *cp != '\0'; cp++) {
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184 /* Any non-digit means it's not an integer;
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185 this takes care of NAN and INF as well. */
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186 if (!isdigit(Py_CHARMASK(*cp)))
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187 break;
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188 }
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189 if (*cp == '\0') {
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190 *cp++ = '.';
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191 *cp++ = '0';
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192 *cp++ = '\0';
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193 }
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194 }
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195
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196 /* ARGSUSED */
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197 static int
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198 float_print(v, fp, flags)
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199 PyFloatObject *v;
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200 FILE *fp;
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201 int flags; /* Not used but required by interface */
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202 {
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203 char buf[100];
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204 PyFloat_AsString(buf, v);
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205 fputs(buf, fp);
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206 return 0;
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207 }
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208
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209 static PyObject *
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210 float_repr(v)
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211 PyFloatObject *v;
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212 {
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213 char buf[100];
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214 PyFloat_AsString(buf, v);
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215 return PyString_FromString(buf);
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216 }
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217
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218 static int
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219 float_compare(v, w)
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220 PyFloatObject *v, *w;
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221 {
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222 double i = v->ob_fval;
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223 double j = w->ob_fval;
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224 return (i < j) ? -1 : (i > j) ? 1 : 0;
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225 }
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226
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227 static long
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228 float_hash(v)
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229 PyFloatObject *v;
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230 {
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231 double intpart, fractpart;
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232 int expo;
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233 long x;
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234 /* This is designed so that Python numbers with the same
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235 value hash to the same value, otherwise comparisons
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236 of mapping keys will turn out weird */
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237
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238 #ifdef MPW /* MPW C modf expects pointer to extended as second argument */
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239 {
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240 extended e;
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241 fractpart = modf(v->ob_fval, &e);
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242 intpart = e;
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243 }
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244 #else
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245 fractpart = modf(v->ob_fval, &intpart);
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246 #endif
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247
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248 if (fractpart == 0.0) {
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249 if (intpart > 0x7fffffffL || -intpart > 0x7fffffffL) {
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250 /* Convert to long int and use its hash... */
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251 PyObject *w = PyLong_FromDouble(v->ob_fval);
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252 if (w == NULL)
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253 return -1;
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254 x = PyObject_Hash(w);
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255 Py_DECREF(w);
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256 return x;
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257 }
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258 x = (long)intpart;
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259 }
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260 else {
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261 /* Note -- if you change this code, also change the copy
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262 in complexobject.c */
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263 long hipart;
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264 fractpart = frexp(fractpart, &expo);
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265 fractpart = fractpart * 2147483648.0; /* 2**31 */
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266 hipart = (long)fractpart; /* Take the top 32 bits */
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267 fractpart = (fractpart - (double)hipart) * 2147483648.0;
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268 /* Get the next 32 bits */
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269 x = hipart + (long)fractpart + (long)intpart + (expo << 15);
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270 /* Combine everything */
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271 }
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272 if (x == -1)
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273 x = -2;
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274 return x;
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275 }
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276
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277 static PyObject *
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278 float_add(v, w)
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279 PyFloatObject *v;
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280 PyFloatObject *w;
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281 {
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282 double result;
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283 PyFPE_START_PROTECT("add", return 0)
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284 result = v->ob_fval + w->ob_fval;
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285 PyFPE_END_PROTECT(result)
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286 return PyFloat_FromDouble(result);
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287 }
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288
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289 static PyObject *
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290 float_sub(v, w)
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291 PyFloatObject *v;
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292 PyFloatObject *w;
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293 {
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294 double result;
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295 PyFPE_START_PROTECT("subtract", return 0)
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296 result = v->ob_fval - w->ob_fval;
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297 PyFPE_END_PROTECT(result)
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298 return PyFloat_FromDouble(result);
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299 }
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300
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301 static PyObject *
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302 float_mul(v, w)
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303 PyFloatObject *v;
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304 PyFloatObject *w;
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305 {
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306 double result;
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307
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308 PyFPE_START_PROTECT("multiply", return 0)
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309 result = v->ob_fval * w->ob_fval;
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310 PyFPE_END_PROTECT(result)
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311 return PyFloat_FromDouble(result);
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312 }
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313
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314 static PyObject *
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315 float_div(v, w)
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316 PyFloatObject *v;
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317 PyFloatObject *w;
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318 {
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319 double result;
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320 if (w->ob_fval == 0) {
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321 PyErr_SetString(PyExc_ZeroDivisionError, "float division");
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322 return NULL;
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323 }
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324 PyFPE_START_PROTECT("divide", return 0)
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325 result = v->ob_fval / w->ob_fval;
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326 PyFPE_END_PROTECT(result)
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327 return PyFloat_FromDouble(result);
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328 }
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329
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330 static PyObject *
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331 float_rem(v, w)
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332 PyFloatObject *v;
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333 PyFloatObject *w;
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334 {
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335 double vx, wx;
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336 double /* div, */ mod;
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337 wx = w->ob_fval;
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338 if (wx == 0.0) {
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339 PyErr_SetString(PyExc_ZeroDivisionError, "float modulo");
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340 return NULL;
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341 }
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342 PyFPE_START_PROTECT("modulo", return 0)
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343 vx = v->ob_fval;
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344 mod = fmod(vx, wx);
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345 /* div = (vx - mod) / wx; */
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346 if (wx*mod < 0) {
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347 mod += wx;
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348 /* div -= 1.0; */
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349 }
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350 PyFPE_END_PROTECT(mod)
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351 return PyFloat_FromDouble(mod);
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352 }
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353
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354 static PyObject *
227
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355 float_divmod(v, w)
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356 PyFloatObject *v;
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357 PyFloatObject *w;
227
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358 {
391
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359 double vx, wx;
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360 double div, mod;
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361 wx = w->ob_fval;
391
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362 if (wx == 0.0) {
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363 PyErr_SetString(PyExc_ZeroDivisionError, "float divmod()");
391
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364 return NULL;
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365 }
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366 PyFPE_START_PROTECT("divmod", return 0)
391
caf8466dcc9c Finally implemented divmod().
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367 vx = v->ob_fval;
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368 mod = fmod(vx, wx);
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369 div = (vx - mod) / wx;
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370 if (wx*mod < 0) {
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371 mod += wx;
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372 div -= 1.0;
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373 }
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374 PyFPE_END_PROTECT(div)
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375 return Py_BuildValue("(dd)", div, mod);
227
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376 }
7ec6058b539b Added (dummy) divmod and (functional) abs.
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diff changeset
377
3608
8573e65fa948 make some things static
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378 static double powu(x, n)
3329
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379 double x;
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380 long n;
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381 {
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382 double r = 1.;
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383 double p = x;
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diff changeset
384 long mask = 1;
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diff changeset
385 while (mask > 0 && n >= mask) {
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diff changeset
386 if (n & mask)
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387 r *= p;
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diff changeset
388 mask <<= 1;
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diff changeset
389 p *= p;
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diff changeset
390 }
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391 return r;
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392 }
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diff changeset
393
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394 static PyObject *
1775
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diff changeset
395 float_pow(v, w, z)
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396 PyFloatObject *v;
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397 PyObject *w;
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398 PyFloatObject *z;
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399 {
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400 double iv, iw, ix;
3329
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diff changeset
401 long intw;
1775
17c80a952914 New patches by Andrew to fix various problems
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diff changeset
402 /* XXX Doesn't handle overflows if z!=None yet; it may never do so :(
17c80a952914 New patches by Andrew to fix various problems
Guido van Rossum <guido@python.org>
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diff changeset
403 * The z parameter is really only going to be useful for integers and
17c80a952914 New patches by Andrew to fix various problems
Guido van Rossum <guido@python.org>
parents: 1746
diff changeset
404 * long integers. Maybe something clever with logarithms could be done.
17c80a952914 New patches by Andrew to fix various problems
Guido van Rossum <guido@python.org>
parents: 1746
diff changeset
405 * [AMK]
17c80a952914 New patches by Andrew to fix various problems
Guido van Rossum <guido@python.org>
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diff changeset
406 */
3329
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diff changeset
407 iv = v->ob_fval;
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408 iw = ((PyFloatObject *)w)->ob_fval;
3329
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diff changeset
409 intw = (long)iw;
4007
1a0aa986f6fa Test for negative # to the nonintegral float power here.
Guido van Rossum <guido@python.org>
parents: 3984
diff changeset
410 if (iw == intw && -10000 < intw && intw < 10000) {
3329
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Guido van Rossum <guido@python.org>
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diff changeset
411 /* Sort out special cases here instead of relying on pow() */
3984
0613f17dcfd8 Correct wrong calculation of pow(0.0, 0.0, negative_number)
Guido van Rossum <guido@python.org>
parents: 3704
diff changeset
412 if (intw == 0) { /* x**0 is 1, even 0**0 */
5118
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diff changeset
413 PyFPE_START_PROTECT("pow", return 0)
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diff changeset
414 if ((PyObject *)z!=Py_None) {
3329
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diff changeset
415 ix=fmod(1.0, z->ob_fval);
67d347c32fff better power implementation
Guido van Rossum <guido@python.org>
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diff changeset
416 if (ix!=0 && z->ob_fval<0) ix+=z->ob_fval;
67d347c32fff better power implementation
Guido van Rossum <guido@python.org>
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diff changeset
417 }
67d347c32fff better power implementation
Guido van Rossum <guido@python.org>
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diff changeset
418 else ix=1.0;
5197
74c12704a0bd New form of PyFPE_END_PROTECT macro.
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diff changeset
419 PyFPE_END_PROTECT(ix)
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420 return PyFloat_FromDouble(ix);
249
bab1f5494b8e Fix special cases in pow()
Guido van Rossum <guido@python.org>
parents: 239
diff changeset
421 }
3984
0613f17dcfd8 Correct wrong calculation of pow(0.0, 0.0, negative_number)
Guido van Rossum <guido@python.org>
parents: 3704
diff changeset
422 errno = 0;
5118
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Guido van Rossum <guido@python.org>
parents: 4933
diff changeset
423 PyFPE_START_PROTECT("pow", return 0)
4007
1a0aa986f6fa Test for negative # to the nonintegral float power here.
Guido van Rossum <guido@python.org>
parents: 3984
diff changeset
424 if (intw > 0)
1a0aa986f6fa Test for negative # to the nonintegral float power here.
Guido van Rossum <guido@python.org>
parents: 3984
diff changeset
425 ix = powu(iv, intw);
1a0aa986f6fa Test for negative # to the nonintegral float power here.
Guido van Rossum <guido@python.org>
parents: 3984
diff changeset
426 else
1a0aa986f6fa Test for negative # to the nonintegral float power here.
Guido van Rossum <guido@python.org>
parents: 3984
diff changeset
427 ix = 1./powu(iv, -intw);
5197
74c12704a0bd New form of PyFPE_END_PROTECT macro.
Guido van Rossum <guido@python.org>
parents: 5118
diff changeset
428 PyFPE_END_PROTECT(ix)
3984
0613f17dcfd8 Correct wrong calculation of pow(0.0, 0.0, negative_number)
Guido van Rossum <guido@python.org>
parents: 3704
diff changeset
429 }
0613f17dcfd8 Correct wrong calculation of pow(0.0, 0.0, negative_number)
Guido van Rossum <guido@python.org>
parents: 3704
diff changeset
430 else {
0613f17dcfd8 Correct wrong calculation of pow(0.0, 0.0, negative_number)
Guido van Rossum <guido@python.org>
parents: 3704
diff changeset
431 /* Sort out special cases here instead of relying on pow() */
3329
67d347c32fff better power implementation
Guido van Rossum <guido@python.org>
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diff changeset
432 if (iv == 0.0) {
67d347c32fff better power implementation
Guido van Rossum <guido@python.org>
parents: 2433
diff changeset
433 if (iw < 0.0) {
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diff changeset
434 PyErr_SetString(PyExc_ValueError,
4007
1a0aa986f6fa Test for negative # to the nonintegral float power here.
Guido van Rossum <guido@python.org>
parents: 3984
diff changeset
435 "0.0 to a negative power");
3329
67d347c32fff better power implementation
Guido van Rossum <guido@python.org>
parents: 2433
diff changeset
436 return NULL;
67d347c32fff better power implementation
Guido van Rossum <guido@python.org>
parents: 2433
diff changeset
437 }
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diff changeset
438 return PyFloat_FromDouble(0.0);
3329
67d347c32fff better power implementation
Guido van Rossum <guido@python.org>
parents: 2433
diff changeset
439 }
4007
1a0aa986f6fa Test for negative # to the nonintegral float power here.
Guido van Rossum <guido@python.org>
parents: 3984
diff changeset
440 if (iv < 0.0) {
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diff changeset
441 PyErr_SetString(PyExc_ValueError,
4007
1a0aa986f6fa Test for negative # to the nonintegral float power here.
Guido van Rossum <guido@python.org>
parents: 3984
diff changeset
442 "negative number to a float power");
1a0aa986f6fa Test for negative # to the nonintegral float power here.
Guido van Rossum <guido@python.org>
parents: 3984
diff changeset
443 return NULL;
1a0aa986f6fa Test for negative # to the nonintegral float power here.
Guido van Rossum <guido@python.org>
parents: 3984
diff changeset
444 }
3329
67d347c32fff better power implementation
Guido van Rossum <guido@python.org>
parents: 2433
diff changeset
445 errno = 0;
5118
002865af55e5 Changes for Lee Busby's SIGFPE patch set.
Guido van Rossum <guido@python.org>
parents: 4933
diff changeset
446 PyFPE_START_PROTECT("pow", return 0)
3329
67d347c32fff better power implementation
Guido van Rossum <guido@python.org>
parents: 2433
diff changeset
447 ix = pow(iv, iw);
5197
74c12704a0bd New form of PyFPE_END_PROTECT macro.
Guido van Rossum <guido@python.org>
parents: 5118
diff changeset
448 PyFPE_END_PROTECT(ix)
249
bab1f5494b8e Fix special cases in pow()
Guido van Rossum <guido@python.org>
parents: 239
diff changeset
449 }
496
0ac392b7f76e Explicitly check for weird values after calling pow().
Guido van Rossum <guido@python.org>
parents: 470
diff changeset
450 CHECK(ix);
27
82c7bab78bb1 New errors.
Guido van Rossum <guido@python.org>
parents: 6
diff changeset
451 if (errno != 0) {
82c7bab78bb1 New errors.
Guido van Rossum <guido@python.org>
parents: 6
diff changeset
452 /* XXX could it be another type of error? */
5396
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parents: 5197
diff changeset
453 PyErr_SetFromErrno(PyExc_OverflowError);
6
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
454 return NULL;
27
82c7bab78bb1 New errors.
Guido van Rossum <guido@python.org>
parents: 6
diff changeset
455 }
5396
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Guido van Rossum <guido@python.org>
parents: 5197
diff changeset
456 if ((PyObject *)z!=Py_None) {
5118
002865af55e5 Changes for Lee Busby's SIGFPE patch set.
Guido van Rossum <guido@python.org>
parents: 4933
diff changeset
457 PyFPE_START_PROTECT("pow", return 0)
1775
17c80a952914 New patches by Andrew to fix various problems
Guido van Rossum <guido@python.org>
parents: 1746
diff changeset
458 ix=fmod(ix, z->ob_fval); /* XXX To Be Rewritten */
17c80a952914 New patches by Andrew to fix various problems
Guido van Rossum <guido@python.org>
parents: 1746
diff changeset
459 if ( ix!=0 &&
17c80a952914 New patches by Andrew to fix various problems
Guido van Rossum <guido@python.org>
parents: 1746
diff changeset
460 ((iv<0 && z->ob_fval>0) || (iv>0 && z->ob_fval<0) )) {
17c80a952914 New patches by Andrew to fix various problems
Guido van Rossum <guido@python.org>
parents: 1746
diff changeset
461 ix+=z->ob_fval;
17c80a952914 New patches by Andrew to fix various problems
Guido van Rossum <guido@python.org>
parents: 1746
diff changeset
462 }
5197
74c12704a0bd New form of PyFPE_END_PROTECT macro.
Guido van Rossum <guido@python.org>
parents: 5118
diff changeset
463 PyFPE_END_PROTECT(ix)
1775
17c80a952914 New patches by Andrew to fix various problems
Guido van Rossum <guido@python.org>
parents: 1746
diff changeset
464 }
5396
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parents: 5197
diff changeset
465 return PyFloat_FromDouble(ix);
6
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
466 }
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
467
5396
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parents: 5197
diff changeset
468 static PyObject *
6
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Guido van Rossum <guido@python.org>
parents:
diff changeset
469 float_neg(v)
5396
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parents: 5197
diff changeset
470 PyFloatObject *v;
6
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
471 {
5396
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Guido van Rossum <guido@python.org>
parents: 5197
diff changeset
472 return PyFloat_FromDouble(-v->ob_fval);
6
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
473 }
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
474
5396
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parents: 5197
diff changeset
475 static PyObject *
6
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
476 float_pos(v)
5396
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Guido van Rossum <guido@python.org>
parents: 5197
diff changeset
477 PyFloatObject *v;
6
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
478 {
5396
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parents: 5197
diff changeset
479 Py_INCREF(v);
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parents: 5197
diff changeset
480 return (PyObject *)v;
227
7ec6058b539b Added (dummy) divmod and (functional) abs.
Guido van Rossum <guido@python.org>
parents: 145
diff changeset
481 }
7ec6058b539b Added (dummy) divmod and (functional) abs.
Guido van Rossum <guido@python.org>
parents: 145
diff changeset
482
5396
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parents: 5197
diff changeset
483 static PyObject *
227
7ec6058b539b Added (dummy) divmod and (functional) abs.
Guido van Rossum <guido@python.org>
parents: 145
diff changeset
484 float_abs(v)
5396
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parents: 5197
diff changeset
485 PyFloatObject *v;
227
7ec6058b539b Added (dummy) divmod and (functional) abs.
Guido van Rossum <guido@python.org>
parents: 145
diff changeset
486 {
7ec6058b539b Added (dummy) divmod and (functional) abs.
Guido van Rossum <guido@python.org>
parents: 145
diff changeset
487 if (v->ob_fval < 0)
7ec6058b539b Added (dummy) divmod and (functional) abs.
Guido van Rossum <guido@python.org>
parents: 145
diff changeset
488 return float_neg(v);
7ec6058b539b Added (dummy) divmod and (functional) abs.
Guido van Rossum <guido@python.org>
parents: 145
diff changeset
489 else
7ec6058b539b Added (dummy) divmod and (functional) abs.
Guido van Rossum <guido@python.org>
parents: 145
diff changeset
490 return float_pos(v);
6
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Guido van Rossum <guido@python.org>
parents:
diff changeset
491 }
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
492
239
fda973f2a512 Added nonzero test
Guido van Rossum <guido@python.org>
parents: 227
diff changeset
493 static int
fda973f2a512 Added nonzero test
Guido van Rossum <guido@python.org>
parents: 227
diff changeset
494 float_nonzero(v)
5396
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Guido van Rossum <guido@python.org>
parents: 5197
diff changeset
495 PyFloatObject *v;
239
fda973f2a512 Added nonzero test
Guido van Rossum <guido@python.org>
parents: 227
diff changeset
496 {
fda973f2a512 Added nonzero test
Guido van Rossum <guido@python.org>
parents: 227
diff changeset
497 return v->ob_fval != 0.0;
fda973f2a512 Added nonzero test
Guido van Rossum <guido@python.org>
parents: 227
diff changeset
498 }
fda973f2a512 Added nonzero test
Guido van Rossum <guido@python.org>
parents: 227
diff changeset
499
1313
6ee380349c84 * Added gmtime/localtime/mktime and SYSV timezone globals to timemodule.c.
Guido van Rossum <guido@python.org>
parents: 1271
diff changeset
500 static int
955
03de67080c95 * classobject.[ch], {float,long,int}object.c, bltinmodule.c:
Guido van Rossum <guido@python.org>
parents: 795
diff changeset
501 float_coerce(pv, pw)
5396
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parents: 5197
diff changeset
502 PyObject **pv;
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Guido van Rossum <guido@python.org>
parents: 5197
diff changeset
503 PyObject **pw;
955
03de67080c95 * classobject.[ch], {float,long,int}object.c, bltinmodule.c:
Guido van Rossum <guido@python.org>
parents: 795
diff changeset
504 {
5396
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Guido van Rossum <guido@python.org>
parents: 5197
diff changeset
505 if (PyInt_Check(*pw)) {
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Guido van Rossum <guido@python.org>
parents: 5197
diff changeset
506 long x = PyInt_AsLong(*pw);
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Guido van Rossum <guido@python.org>
parents: 5197
diff changeset
507 *pw = PyFloat_FromDouble((double)x);
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Guido van Rossum <guido@python.org>
parents: 5197
diff changeset
508 Py_INCREF(*pv);
955
03de67080c95 * classobject.[ch], {float,long,int}object.c, bltinmodule.c:
Guido van Rossum <guido@python.org>
parents: 795
diff changeset
509 return 0;
03de67080c95 * classobject.[ch], {float,long,int}object.c, bltinmodule.c:
Guido van Rossum <guido@python.org>
parents: 795
diff changeset
510 }
5396
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Guido van Rossum <guido@python.org>
parents: 5197
diff changeset
511 else if (PyLong_Check(*pw)) {
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Guido van Rossum <guido@python.org>
parents: 5197
diff changeset
512 *pw = PyFloat_FromDouble(PyLong_AsDouble(*pw));
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Guido van Rossum <guido@python.org>
parents: 5197
diff changeset
513 Py_INCREF(*pv);
955
03de67080c95 * classobject.[ch], {float,long,int}object.c, bltinmodule.c:
Guido van Rossum <guido@python.org>
parents: 795
diff changeset
514 return 0;
03de67080c95 * classobject.[ch], {float,long,int}object.c, bltinmodule.c:
Guido van Rossum <guido@python.org>
parents: 795
diff changeset
515 }
03de67080c95 * classobject.[ch], {float,long,int}object.c, bltinmodule.c:
Guido van Rossum <guido@python.org>
parents: 795
diff changeset
516 return 1; /* Can't do it */
03de67080c95 * classobject.[ch], {float,long,int}object.c, bltinmodule.c:
Guido van Rossum <guido@python.org>
parents: 795
diff changeset
517 }
03de67080c95 * classobject.[ch], {float,long,int}object.c, bltinmodule.c:
Guido van Rossum <guido@python.org>
parents: 795
diff changeset
518
5396
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Guido van Rossum <guido@python.org>
parents: 5197
diff changeset
519 static PyObject *
1049
2ed511171809 Made builtins int(), long(), float(), oct() and hex() more generic.
Guido van Rossum <guido@python.org>
parents: 955
diff changeset
520 float_int(v)
5396
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Guido van Rossum <guido@python.org>
parents: 5197
diff changeset
521 PyObject *v;
1049
2ed511171809 Made builtins int(), long(), float(), oct() and hex() more generic.
Guido van Rossum <guido@python.org>
parents: 955
diff changeset
522 {
5396
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Guido van Rossum <guido@python.org>
parents: 5197
diff changeset
523 double x = PyFloat_AsDouble(v);
1908
0437738279a8 * Include/classobject.h, Objects/classobject.c, Python/ceval.c:
Guido van Rossum <guido@python.org>
parents: 1775
diff changeset
524 if (x < 0 ? (x = ceil(x)) < (double)LONG_MIN
0437738279a8 * Include/classobject.h, Objects/classobject.c, Python/ceval.c:
Guido van Rossum <guido@python.org>
parents: 1775
diff changeset
525 : (x = floor(x)) > (double)LONG_MAX) {
5396
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Guido van Rossum <guido@python.org>
parents: 5197
diff changeset
526 PyErr_SetString(PyExc_OverflowError,
d1447950fa04 Quickly renamed the last directory.
Guido van Rossum <guido@python.org>
parents: 5197
diff changeset
527 "float too large to convert");
1908
0437738279a8 * Include/classobject.h, Objects/classobject.c, Python/ceval.c:
Guido van Rossum <guido@python.org>
parents: 1775
diff changeset
528 return NULL;
0437738279a8 * Include/classobject.h, Objects/classobject.c, Python/ceval.c:
Guido van Rossum <guido@python.org>
parents: 1775
diff changeset
529 }
5396
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Guido van Rossum <guido@python.org>
parents: 5197
diff changeset
530 return PyInt_FromLong((long)x);
1049
2ed511171809 Made builtins int(), long(), float(), oct() and hex() more generic.
Guido van Rossum <guido@python.org>
parents: 955
diff changeset
531 }
2ed511171809 Made builtins int(), long(), float(), oct() and hex() more generic.
Guido van Rossum <guido@python.org>
parents: 955
diff changeset
532
5396
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Guido van Rossum <guido@python.org>
parents: 5197
diff changeset
533 static PyObject *
1049
2ed511171809 Made builtins int(), long(), float(), oct() and hex() more generic.
Guido van Rossum <guido@python.org>
parents: 955
diff changeset
534 float_long(v)
5396
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Guido van Rossum <guido@python.org>
parents: 5197
diff changeset
535 PyObject *v;
1049
2ed511171809 Made builtins int(), long(), float(), oct() and hex() more generic.
Guido van Rossum <guido@python.org>
parents: 955
diff changeset
536 {
5396
d1447950fa04 Quickly renamed the last directory.
Guido van Rossum <guido@python.org>
parents: 5197
diff changeset
537 double x = PyFloat_AsDouble(v);
d1447950fa04 Quickly renamed the last directory.
Guido van Rossum <guido@python.org>
parents: 5197
diff changeset
538 return PyLong_FromDouble(x);
1049
2ed511171809 Made builtins int(), long(), float(), oct() and hex() more generic.
Guido van Rossum <guido@python.org>
parents: 955
diff changeset
539 }
2ed511171809 Made builtins int(), long(), float(), oct() and hex() more generic.
Guido van Rossum <guido@python.org>
parents: 955
diff changeset
540
5396
d1447950fa04 Quickly renamed the last directory.
Guido van Rossum <guido@python.org>
parents: 5197
diff changeset
541 static PyObject *
1049
2ed511171809 Made builtins int(), long(), float(), oct() and hex() more generic.
Guido van Rossum <guido@python.org>
parents: 955
diff changeset
542 float_float(v)
5396
d1447950fa04 Quickly renamed the last directory.
Guido van Rossum <guido@python.org>
parents: 5197
diff changeset
543 PyObject *v;
1049
2ed511171809 Made builtins int(), long(), float(), oct() and hex() more generic.
Guido van Rossum <guido@python.org>
parents: 955
diff changeset
544 {
5396
d1447950fa04 Quickly renamed the last directory.
Guido van Rossum <guido@python.org>
parents: 5197
diff changeset
545 Py_INCREF(v);
1049
2ed511171809 Made builtins int(), long(), float(), oct() and hex() more generic.
Guido van Rossum <guido@python.org>
parents: 955
diff changeset
546 return v;
2ed511171809 Made builtins int(), long(), float(), oct() and hex() more generic.
Guido van Rossum <guido@python.org>
parents: 955
diff changeset
547 }
2ed511171809 Made builtins int(), long(), float(), oct() and hex() more generic.
Guido van Rossum <guido@python.org>
parents: 955
diff changeset
548
2ed511171809 Made builtins int(), long(), float(), oct() and hex() more generic.
Guido van Rossum <guido@python.org>
parents: 955
diff changeset
549
5396
d1447950fa04 Quickly renamed the last directory.
Guido van Rossum <guido@python.org>
parents: 5197
diff changeset
550 static PyNumberMethods float_as_number = {
1746
1940892d2fe3 Merge alpha100 branch back to main trunk
Guido van Rossum <guido@python.org>
parents: 1347
diff changeset
551 (binaryfunc)float_add, /*nb_add*/
1940892d2fe3 Merge alpha100 branch back to main trunk
Guido van Rossum <guido@python.org>
parents: 1347
diff changeset
552 (binaryfunc)float_sub, /*nb_subtract*/
1940892d2fe3 Merge alpha100 branch back to main trunk
Guido van Rossum <guido@python.org>
parents: 1347
diff changeset
553 (binaryfunc)float_mul, /*nb_multiply*/
1940892d2fe3 Merge alpha100 branch back to main trunk
Guido van Rossum <guido@python.org>
parents: 1347
diff changeset
554 (binaryfunc)float_div, /*nb_divide*/
1940892d2fe3 Merge alpha100 branch back to main trunk
Guido van Rossum <guido@python.org>
parents: 1347
diff changeset
555 (binaryfunc)float_rem, /*nb_remainder*/
1940892d2fe3 Merge alpha100 branch back to main trunk
Guido van Rossum <guido@python.org>
parents: 1347
diff changeset
556 (binaryfunc)float_divmod, /*nb_divmod*/
1775
17c80a952914 New patches by Andrew to fix various problems
Guido van Rossum <guido@python.org>
parents: 1746
diff changeset
557 (ternaryfunc)float_pow, /*nb_power*/
1746
1940892d2fe3 Merge alpha100 branch back to main trunk
Guido van Rossum <guido@python.org>
parents: 1347
diff changeset
558 (unaryfunc)float_neg, /*nb_negative*/
1940892d2fe3 Merge alpha100 branch back to main trunk
Guido van Rossum <guido@python.org>
parents: 1347
diff changeset
559 (unaryfunc)float_pos, /*nb_positive*/
1940892d2fe3 Merge alpha100 branch back to main trunk
Guido van Rossum <guido@python.org>
parents: 1347
diff changeset
560 (unaryfunc)float_abs, /*nb_absolute*/
1940892d2fe3 Merge alpha100 branch back to main trunk
Guido van Rossum <guido@python.org>
parents: 1347
diff changeset
561 (inquiry)float_nonzero, /*nb_nonzero*/
405
d3d328680328 Added NULL function pointers for shift and mask ops.
Guido van Rossum <guido@python.org>
parents: 391
diff changeset
562 0, /*nb_invert*/
d3d328680328 Added NULL function pointers for shift and mask ops.
Guido van Rossum <guido@python.org>
parents: 391
diff changeset
563 0, /*nb_lshift*/
d3d328680328 Added NULL function pointers for shift and mask ops.
Guido van Rossum <guido@python.org>
parents: 391
diff changeset
564 0, /*nb_rshift*/
d3d328680328 Added NULL function pointers for shift and mask ops.
Guido van Rossum <guido@python.org>
parents: 391
diff changeset
565 0, /*nb_and*/
d3d328680328 Added NULL function pointers for shift and mask ops.
Guido van Rossum <guido@python.org>
parents: 391
diff changeset
566 0, /*nb_xor*/
d3d328680328 Added NULL function pointers for shift and mask ops.
Guido van Rossum <guido@python.org>
parents: 391
diff changeset
567 0, /*nb_or*/
1746
1940892d2fe3 Merge alpha100 branch back to main trunk
Guido van Rossum <guido@python.org>
parents: 1347
diff changeset
568 (coercion)float_coerce, /*nb_coerce*/
1940892d2fe3 Merge alpha100 branch back to main trunk
Guido van Rossum <guido@python.org>
parents: 1347
diff changeset
569 (unaryfunc)float_int, /*nb_int*/
1940892d2fe3 Merge alpha100 branch back to main trunk
Guido van Rossum <guido@python.org>
parents: 1347
diff changeset
570 (unaryfunc)float_long, /*nb_long*/
1940892d2fe3 Merge alpha100 branch back to main trunk
Guido van Rossum <guido@python.org>
parents: 1347
diff changeset
571 (unaryfunc)float_float, /*nb_float*/
1049
2ed511171809 Made builtins int(), long(), float(), oct() and hex() more generic.
Guido van Rossum <guido@python.org>
parents: 955
diff changeset
572 0, /*nb_oct*/
2ed511171809 Made builtins int(), long(), float(), oct() and hex() more generic.
Guido van Rossum <guido@python.org>
parents: 955
diff changeset
573 0, /*nb_hex*/
6
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
574 };
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
575
5396
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Guido van Rossum <guido@python.org>
parents: 5197
diff changeset
576 PyTypeObject PyFloat_Type = {
d1447950fa04 Quickly renamed the last directory.
Guido van Rossum <guido@python.org>
parents: 5197
diff changeset
577 PyObject_HEAD_INIT(&PyType_Type)
6
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
578 0,
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
579 "float",
5396
d1447950fa04 Quickly renamed the last directory.
Guido van Rossum <guido@python.org>
parents: 5197
diff changeset
580 sizeof(PyFloatObject),
6
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
581 0,
1746
1940892d2fe3 Merge alpha100 branch back to main trunk
Guido van Rossum <guido@python.org>
parents: 1347
diff changeset
582 (destructor)float_dealloc, /*tp_dealloc*/
1940892d2fe3 Merge alpha100 branch back to main trunk
Guido van Rossum <guido@python.org>
parents: 1347
diff changeset
583 (printfunc)float_print, /*tp_print*/
6
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
584 0, /*tp_getattr*/
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
585 0, /*tp_setattr*/
1746
1940892d2fe3 Merge alpha100 branch back to main trunk
Guido van Rossum <guido@python.org>
parents: 1347
diff changeset
586 (cmpfunc)float_compare, /*tp_compare*/
1940892d2fe3 Merge alpha100 branch back to main trunk
Guido van Rossum <guido@python.org>
parents: 1347
diff changeset
587 (reprfunc)float_repr, /*tp_repr*/
6
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
588 &float_as_number, /*tp_as_number*/
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
589 0, /*tp_as_sequence*/
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
590 0, /*tp_as_mapping*/
1746
1940892d2fe3 Merge alpha100 branch back to main trunk
Guido van Rossum <guido@python.org>
parents: 1347
diff changeset
591 (hashfunc)float_hash, /*tp_hash*/
6
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
592 };