Mercurial > cpython-lru_cache-weakref

annotate Objects/floatobject.c @ 4282:daf12f64d5aa legacy-trunk

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Get rid of bogus MSC_VER undef of CHECK()
author Guido van Rossum <guido@python.org>
date Wed, 11 Sep 1996 20:21:41 +0000
parents 1a0aa986f6fa
children 65d2d8e67da3
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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 not be used in advertising or publicity pertaining to
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13 distribution of the software without specific, written prior permission.
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14
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15 STICHTING MATHEMATISCH CENTRUM DISCLAIMS ALL WARRANTIES WITH REGARD TO
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16 THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
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17 FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH CENTRUM BE LIABLE
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18 FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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19 WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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20 ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
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21 OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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22
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23 ******************************************************************/
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24
6
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25 /* Float object implementation */
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26
27
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27 /* XXX There should be overflow checks here, but it's hard to check
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28 for any kind of float exception without losing portability. */
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29
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30 #include "allobjects.h"
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31 #include "modsupport.h"
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32
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33 #include <errno.h>
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34 #include <ctype.h>
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35 #include "mymath.h"
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36
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37 #ifdef i860
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38 /* Cray APP has bogus definition of HUGE_VAL in <math.h> */
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39 #undef HUGE_VAL
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40 #endif
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41
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42 #if defined(HUGE_VAL) && !defined(CHECK)
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43 #define CHECK(x) if (errno != 0) ; \
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44 else if (-HUGE_VAL <= (x) && (x) <= HUGE_VAL) ; \
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45 else errno = ERANGE
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46 #endif
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47
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48 #ifndef CHECK
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49 #define CHECK(x) /* Don't know how to check */
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50 #endif
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51
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52 #ifdef HAVE_LIMITS_H
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53 #include <limits.h>
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54 #endif
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55
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56 #ifndef LONG_MAX
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57 #define LONG_MAX 0X7FFFFFFFL
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58 #endif
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59
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60 #ifndef LONG_MIN
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61 #define LONG_MIN (-LONG_MAX-1)
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62 #endif
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63
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64 #ifdef __NeXT__
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65 #ifdef __sparc__
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66 /*
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67 * This works around a bug in the NS/Sparc 3.3 pre-release
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68 * limits.h header file.
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69 * 10-Feb-1995 bwarsaw@cnri.reston.va.us
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70 */
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71 #undef LONG_MIN
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72 #define LONG_MIN (-LONG_MAX-1)
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73 #endif
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74 #endif
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75
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76 #if !defined(__STDC__) && !defined(macintosh)
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77 extern double fmod PROTO((double, double));
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78 extern double pow PROTO((double, double));
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79 #endif
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80
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81 object *
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82 #ifdef __SC__
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83 newfloatobject(double fval)
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84 #else
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85 newfloatobject(fval)
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86 double fval;
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87 #endif
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88 {
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89 /* For efficiency, this code is copied from newobject() */
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90 register floatobject *op = (floatobject *) malloc(sizeof(floatobject));
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91 if (op == NULL)
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92 return err_nomem();
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93 op->ob_type = &Floattype;
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94 op->ob_fval = fval;
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95 NEWREF(op);
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96 return (object *) op;
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97 }
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98
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99 static void
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100 float_dealloc(op)
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101 object *op;
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102 {
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103 DEL(op);
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104 }
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105
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106 double
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107 getfloatvalue(op)
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108 object *op;
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109 {
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110 number_methods *nb;
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111 floatobject *fo;
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112 double val;
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113
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114 if (op && is_floatobject(op))
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115 return GETFLOATVALUE((floatobject*) op);
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116
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117 if (op == NULL || (nb = op->ob_type->tp_as_number) == NULL ||
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118 nb->nb_float == NULL) {
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119 err_badarg();
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120 return -1;
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121 }
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122
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123 fo = (floatobject*) (*nb->nb_float) (op);
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124 if (fo == NULL)
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125 return -1;
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126 if (!is_floatobject(fo)) {
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127 err_setstr(TypeError, "nb_float should return float object");
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128 return -1;
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129 }
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130
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131 val = GETFLOATVALUE(fo);
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132 DECREF(fo);
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133
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134 return val;
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135 }
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136
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137 /* Methods */
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138
268
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139 void
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140 float_buf_repr(buf, v)
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141 char *buf;
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142 floatobject *v;
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143 {
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144 register char *cp;
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145 /* Subroutine for float_repr and float_print.
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146 We want float numbers to be recognizable as such,
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147 i.e., they should contain a decimal point or an exponent.
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148 However, %g may print the number as an integer;
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149 in such cases, we append ".0" to the string. */
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150 sprintf(buf, "%.12g", v->ob_fval);
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151 cp = buf;
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152 if (*cp == '-')
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153 cp++;
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154 for (; *cp != '\0'; cp++) {
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155 /* Any non-digit means it's not an integer;
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156 this takes care of NAN and INF as well. */
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157 if (!isdigit(Py_CHARMASK(*cp)))
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158 break;
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159 }
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160 if (*cp == '\0') {
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161 *cp++ = '.';
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162 *cp++ = '0';
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163 *cp++ = '\0';
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164 }
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165 }
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166
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167 /* ARGSUSED */
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168 static int
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169 float_print(v, fp, flags)
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170 floatobject *v;
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171 FILE *fp;
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172 int flags; /* Not used but required by interface */
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173 {
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174 char buf[100];
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175 float_buf_repr(buf, v);
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176 fputs(buf, fp);
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177 return 0;
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178 }
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179
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180 static object *
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181 float_repr(v)
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182 floatobject *v;
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183 {
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184 char buf[100];
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185 float_buf_repr(buf, v);
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186 return newstringobject(buf);
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187 }
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188
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189 static int
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190 float_compare(v, w)
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191 floatobject *v, *w;
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192 {
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193 double i = v->ob_fval;
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194 double j = w->ob_fval;
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195 return (i < j) ? -1 : (i > j) ? 1 : 0;
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196 }
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197
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198 static long
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199 float_hash(v)
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200 floatobject *v;
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201 {
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202 double intpart, fractpart;
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203 int expo;
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204 long x;
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205 /* This is designed so that Python numbers with the same
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206 value hash to the same value, otherwise comparisons
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207 of mapping keys will turn out weird */
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208
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209 #ifdef MPW /* MPW C modf expects pointer to extended as second argument */
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210 {
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211 extended e;
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212 fractpart = modf(v->ob_fval, &e);
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213 intpart = e;
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214 }
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215 #else
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216 fractpart = modf(v->ob_fval, &intpart);
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217 #endif
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218
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219 if (fractpart == 0.0) {
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220 if (intpart > 0x7fffffffL || -intpart > 0x7fffffffL) {
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221 /* Convert to long int and use its hash... */
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222 object *w = dnewlongobject(v->ob_fval);
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223 if (w == NULL)
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224 return -1;
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225 x = hashobject(w);
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226 DECREF(w);
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227 return x;
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228 }
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229 x = (long)intpart;
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230 }
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231 else {
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232 fractpart = frexp(fractpart, &expo);
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233 fractpart = fractpart*2147483648.0; /* 2**31 */
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234 x = (long) (intpart + fractpart) ^ expo; /* Rather arbitrary */
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235 }
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236 if (x == -1)
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237 x = -2;
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238 return x;
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239 }
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240
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241 static object *
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242 float_add(v, w)
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243 floatobject *v;
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244 floatobject *w;
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245 {
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246 return newfloatobject(v->ob_fval + w->ob_fval);
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247 }
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248
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249 static object *
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250 float_sub(v, w)
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251 floatobject *v;
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252 floatobject *w;
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253 {
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254 return newfloatobject(v->ob_fval - w->ob_fval);
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255 }
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256
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257 static object *
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258 float_mul(v, w)
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259 floatobject *v;
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260 floatobject *w;
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261 {
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262 return newfloatobject(v->ob_fval * w->ob_fval);
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263 }
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264
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265 static object *
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266 float_div(v, w)
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267 floatobject *v;
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268 floatobject *w;
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269 {
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270 if (w->ob_fval == 0) {
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271 err_setstr(ZeroDivisionError, "float division");
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272 return NULL;
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273 }
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274 return newfloatobject(v->ob_fval / w->ob_fval);
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275 }
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276
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277 static object *
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278 float_rem(v, w)
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279 floatobject *v;
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280 floatobject *w;
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281 {
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282 double vx, wx;
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283 double /* div, */ mod;
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284 wx = w->ob_fval;
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285 if (wx == 0.0) {
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286 err_setstr(ZeroDivisionError, "float modulo");
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287 return NULL;
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288 }
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289 vx = v->ob_fval;
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290 mod = fmod(vx, wx);
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291 /* div = (vx - mod) / wx; */
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292 if (wx*mod < 0) {
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293 mod += wx;
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294 /* div -= 1.0; */
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295 }
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296 return newfloatobject(mod);
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297 }
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298
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299 static object *
227
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300 float_divmod(v, w)
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301 floatobject *v;
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302 floatobject *w;
227
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303 {
391
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304 double vx, wx;
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305 double div, mod;
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306 wx = w->ob_fval;
391
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307 if (wx == 0.0) {
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308 err_setstr(ZeroDivisionError, "float divmod()");
391
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309 return NULL;
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310 }
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diff changeset
311 vx = v->ob_fval;
caf8466dcc9c Finally implemented divmod().
Guido van Rossum <guido@python.org>
parents: 284
diff changeset
312 mod = fmod(vx, wx);
caf8466dcc9c Finally implemented divmod().
Guido van Rossum <guido@python.org>
parents: 284
diff changeset
313 div = (vx - mod) / wx;
caf8466dcc9c Finally implemented divmod().
Guido van Rossum <guido@python.org>
parents: 284
diff changeset
314 if (wx*mod < 0) {
caf8466dcc9c Finally implemented divmod().
Guido van Rossum <guido@python.org>
parents: 284
diff changeset
315 mod += wx;
caf8466dcc9c Finally implemented divmod().
Guido van Rossum <guido@python.org>
parents: 284
diff changeset
316 div -= 1.0;
caf8466dcc9c Finally implemented divmod().
Guido van Rossum <guido@python.org>
parents: 284
diff changeset
317 }
1252
c4cd0d9d8281 * Changed many files to use mkvalue() instead of newtupleobject().
Guido van Rossum <guido@python.org>
parents: 1049
diff changeset
318 return mkvalue("(dd)", div, mod);
227
7ec6058b539b Added (dummy) divmod and (functional) abs.
Guido van Rossum <guido@python.org>
parents: 145
diff changeset
319 }
7ec6058b539b Added (dummy) divmod and (functional) abs.
Guido van Rossum <guido@python.org>
parents: 145
diff changeset
320
3608
8573e65fa948 make some things static
Guido van Rossum <guido@python.org>
parents: 3329
diff changeset
321 static double powu(x, n)
3329
67d347c32fff better power implementation
Guido van Rossum <guido@python.org>
parents: 2433
diff changeset
322 double x;
67d347c32fff better power implementation
Guido van Rossum <guido@python.org>
parents: 2433
diff changeset
323 long n;
67d347c32fff better power implementation
Guido van Rossum <guido@python.org>
parents: 2433
diff changeset
324 {
67d347c32fff better power implementation
Guido van Rossum <guido@python.org>
parents: 2433
diff changeset
325 double r = 1.;
67d347c32fff better power implementation
Guido van Rossum <guido@python.org>
parents: 2433
diff changeset
326 double p = x;
67d347c32fff better power implementation
Guido van Rossum <guido@python.org>
parents: 2433
diff changeset
327 long mask = 1;
67d347c32fff better power implementation
Guido van Rossum <guido@python.org>
parents: 2433
diff changeset
328 while (mask > 0 && n >= mask) {
67d347c32fff better power implementation
Guido van Rossum <guido@python.org>
parents: 2433
diff changeset
329 if (n & mask)
67d347c32fff better power implementation
Guido van Rossum <guido@python.org>
parents: 2433
diff changeset
330 r *= p;
67d347c32fff better power implementation
Guido van Rossum <guido@python.org>
parents: 2433
diff changeset
331 mask <<= 1;
67d347c32fff better power implementation
Guido van Rossum <guido@python.org>
parents: 2433
diff changeset
332 p *= p;
67d347c32fff better power implementation
Guido van Rossum <guido@python.org>
parents: 2433
diff changeset
333 }
67d347c32fff better power implementation
Guido van Rossum <guido@python.org>
parents: 2433
diff changeset
334 return r;
67d347c32fff better power implementation
Guido van Rossum <guido@python.org>
parents: 2433
diff changeset
335 }
67d347c32fff better power implementation
Guido van Rossum <guido@python.org>
parents: 2433
diff changeset
336
227
7ec6058b539b Added (dummy) divmod and (functional) abs.
Guido van Rossum <guido@python.org>
parents: 145
diff changeset
337 static object *
1775
17c80a952914 New patches by Andrew to fix various problems
Guido van Rossum <guido@python.org>
parents: 1746
diff changeset
338 float_pow(v, w, z)
6
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
339 floatobject *v;
3329
67d347c32fff better power implementation
Guido van Rossum <guido@python.org>
parents: 2433
diff changeset
340 object *w;
1775
17c80a952914 New patches by Andrew to fix various problems
Guido van Rossum <guido@python.org>
parents: 1746
diff changeset
341 floatobject *z;
6
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
342 {
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
343 double iv, iw, ix;
3329
67d347c32fff better power implementation
Guido van Rossum <guido@python.org>
parents: 2433
diff changeset
344 long intw;
1775
17c80a952914 New patches by Andrew to fix various problems
Guido van Rossum <guido@python.org>
parents: 1746
diff changeset
345 /* 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>
parents: 1746
diff changeset
346 * 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
347 * 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
348 * [AMK]
17c80a952914 New patches by Andrew to fix various problems
Guido van Rossum <guido@python.org>
parents: 1746
diff changeset
349 */
3329
67d347c32fff better power implementation
Guido van Rossum <guido@python.org>
parents: 2433
diff changeset
350 iv = v->ob_fval;
67d347c32fff better power implementation
Guido van Rossum <guido@python.org>
parents: 2433
diff changeset
351 iw = ((floatobject *)w)->ob_fval;
67d347c32fff better power implementation
Guido van Rossum <guido@python.org>
parents: 2433
diff changeset
352 intw = (long)iw;
4007
1a0aa986f6fa Test for negative # to the nonintegral float power here.
Guido van Rossum <guido@python.org>
parents: 3984
diff changeset
353 if (iw == intw && -10000 < intw && intw < 10000) {
3329
67d347c32fff better power implementation
Guido van Rossum <guido@python.org>
parents: 2433
diff changeset
354 /* 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
355 if (intw == 0) { /* x**0 is 1, even 0**0 */
3329
67d347c32fff better power implementation
Guido van Rossum <guido@python.org>
parents: 2433
diff changeset
356 if ((object *)z!=None) {
67d347c32fff better power implementation
Guido van Rossum <guido@python.org>
parents: 2433
diff changeset
357 ix=fmod(1.0, z->ob_fval);
67d347c32fff better power implementation
Guido van Rossum <guido@python.org>
parents: 2433
diff changeset
358 if (ix!=0 && z->ob_fval<0) ix+=z->ob_fval;
67d347c32fff better power implementation
Guido van Rossum <guido@python.org>
parents: 2433
diff changeset
359 }
67d347c32fff better power implementation
Guido van Rossum <guido@python.org>
parents: 2433
diff changeset
360 else ix=1.0;
67d347c32fff better power implementation
Guido van Rossum <guido@python.org>
parents: 2433
diff changeset
361 return newfloatobject(ix);
249
bab1f5494b8e Fix special cases in pow()
Guido van Rossum <guido@python.org>
parents: 239
diff changeset
362 }
3984
0613f17dcfd8 Correct wrong calculation of pow(0.0, 0.0, negative_number)
Guido van Rossum <guido@python.org>
parents: 3704
diff changeset
363 errno = 0;
4007
1a0aa986f6fa Test for negative # to the nonintegral float power here.
Guido van Rossum <guido@python.org>
parents: 3984
diff changeset
364 if (intw > 0)
1a0aa986f6fa Test for negative # to the nonintegral float power here.
Guido van Rossum <guido@python.org>
parents: 3984
diff changeset
365 ix = powu(iv, intw);
1a0aa986f6fa Test for negative # to the nonintegral float power here.
Guido van Rossum <guido@python.org>
parents: 3984
diff changeset
366 else
1a0aa986f6fa Test for negative # to the nonintegral float power here.
Guido van Rossum <guido@python.org>
parents: 3984
diff changeset
367 ix = 1./powu(iv, -intw);
3984
0613f17dcfd8 Correct wrong calculation of pow(0.0, 0.0, negative_number)
Guido van Rossum <guido@python.org>
parents: 3704
diff changeset
368 }
0613f17dcfd8 Correct wrong calculation of pow(0.0, 0.0, negative_number)
Guido van Rossum <guido@python.org>
parents: 3704
diff changeset
369 else {
0613f17dcfd8 Correct wrong calculation of pow(0.0, 0.0, negative_number)
Guido van Rossum <guido@python.org>
parents: 3704
diff changeset
370 /* Sort out special cases here instead of relying on pow() */
3329
67d347c32fff better power implementation
Guido van Rossum <guido@python.org>
parents: 2433
diff changeset
371 if (iv == 0.0) {
67d347c32fff better power implementation
Guido van Rossum <guido@python.org>
parents: 2433
diff changeset
372 if (iw < 0.0) {
4007
1a0aa986f6fa Test for negative # to the nonintegral float power here.
Guido van Rossum <guido@python.org>
parents: 3984
diff changeset
373 err_setstr(ValueError,
1a0aa986f6fa Test for negative # to the nonintegral float power here.
Guido van Rossum <guido@python.org>
parents: 3984
diff changeset
374 "0.0 to a negative power");
3329
67d347c32fff better power implementation
Guido van Rossum <guido@python.org>
parents: 2433
diff changeset
375 return NULL;
67d347c32fff better power implementation
Guido van Rossum <guido@python.org>
parents: 2433
diff changeset
376 }
67d347c32fff better power implementation
Guido van Rossum <guido@python.org>
parents: 2433
diff changeset
377 return newfloatobject(0.0);
67d347c32fff better power implementation
Guido van Rossum <guido@python.org>
parents: 2433
diff changeset
378 }
4007
1a0aa986f6fa Test for negative # to the nonintegral float power here.
Guido van Rossum <guido@python.org>
parents: 3984
diff changeset
379 if (iv < 0.0) {
1a0aa986f6fa Test for negative # to the nonintegral float power here.
Guido van Rossum <guido@python.org>
parents: 3984
diff changeset
380 err_setstr(ValueError,
1a0aa986f6fa Test for negative # to the nonintegral float power here.
Guido van Rossum <guido@python.org>
parents: 3984
diff changeset
381 "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
382 return NULL;
1a0aa986f6fa Test for negative # to the nonintegral float power here.
Guido van Rossum <guido@python.org>
parents: 3984
diff changeset
383 }
3329
67d347c32fff better power implementation
Guido van Rossum <guido@python.org>
parents: 2433
diff changeset
384 errno = 0;
67d347c32fff better power implementation
Guido van Rossum <guido@python.org>
parents: 2433
diff changeset
385 ix = pow(iv, iw);
249
bab1f5494b8e Fix special cases in pow()
Guido van Rossum <guido@python.org>
parents: 239
diff changeset
386 }
496
0ac392b7f76e Explicitly check for weird values after calling pow().
Guido van Rossum <guido@python.org>
parents: 470
diff changeset
387 CHECK(ix);
27
82c7bab78bb1 New errors.
Guido van Rossum <guido@python.org>
parents: 6
diff changeset
388 if (errno != 0) {
82c7bab78bb1 New errors.
Guido van Rossum <guido@python.org>
parents: 6
diff changeset
389 /* XXX could it be another type of error? */
82c7bab78bb1 New errors.
Guido van Rossum <guido@python.org>
parents: 6
diff changeset
390 err_errno(OverflowError);
6
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
391 return NULL;
27
82c7bab78bb1 New errors.
Guido van Rossum <guido@python.org>
parents: 6
diff changeset
392 }
1775
17c80a952914 New patches by Andrew to fix various problems
Guido van Rossum <guido@python.org>
parents: 1746
diff changeset
393 if ((object *)z!=None) {
17c80a952914 New patches by Andrew to fix various problems
Guido van Rossum <guido@python.org>
parents: 1746
diff changeset
394 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
395 if ( ix!=0 &&
17c80a952914 New patches by Andrew to fix various problems
Guido van Rossum <guido@python.org>
parents: 1746
diff changeset
396 ((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
397 ix+=z->ob_fval;
17c80a952914 New patches by Andrew to fix various problems
Guido van Rossum <guido@python.org>
parents: 1746
diff changeset
398 }
17c80a952914 New patches by Andrew to fix various problems
Guido van Rossum <guido@python.org>
parents: 1746
diff changeset
399 }
27
82c7bab78bb1 New errors.
Guido van Rossum <guido@python.org>
parents: 6
diff changeset
400 return newfloatobject(ix);
6
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
401 }
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
402
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
403 static object *
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
404 float_neg(v)
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
405 floatobject *v;
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
406 {
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
407 return newfloatobject(-v->ob_fval);
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
408 }
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
409
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
410 static object *
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
411 float_pos(v)
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
412 floatobject *v;
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
413 {
227
7ec6058b539b Added (dummy) divmod and (functional) abs.
Guido van Rossum <guido@python.org>
parents: 145
diff changeset
414 INCREF(v);
7ec6058b539b Added (dummy) divmod and (functional) abs.
Guido van Rossum <guido@python.org>
parents: 145
diff changeset
415 return (object *)v;
7ec6058b539b Added (dummy) divmod and (functional) abs.
Guido van Rossum <guido@python.org>
parents: 145
diff changeset
416 }
7ec6058b539b Added (dummy) divmod and (functional) abs.
Guido van Rossum <guido@python.org>
parents: 145
diff changeset
417
7ec6058b539b Added (dummy) divmod and (functional) abs.
Guido van Rossum <guido@python.org>
parents: 145
diff changeset
418 static object *
7ec6058b539b Added (dummy) divmod and (functional) abs.
Guido van Rossum <guido@python.org>
parents: 145
diff changeset
419 float_abs(v)
7ec6058b539b Added (dummy) divmod and (functional) abs.
Guido van Rossum <guido@python.org>
parents: 145
diff changeset
420 floatobject *v;
7ec6058b539b Added (dummy) divmod and (functional) abs.
Guido van Rossum <guido@python.org>
parents: 145
diff changeset
421 {
7ec6058b539b Added (dummy) divmod and (functional) abs.
Guido van Rossum <guido@python.org>
parents: 145
diff changeset
422 if (v->ob_fval < 0)
7ec6058b539b Added (dummy) divmod and (functional) abs.
Guido van Rossum <guido@python.org>
parents: 145
diff changeset
423 return float_neg(v);
7ec6058b539b Added (dummy) divmod and (functional) abs.
Guido van Rossum <guido@python.org>
parents: 145
diff changeset
424 else
7ec6058b539b Added (dummy) divmod and (functional) abs.
Guido van Rossum <guido@python.org>
parents: 145
diff changeset
425 return float_pos(v);
6
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
426 }
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
427
239
fda973f2a512 Added nonzero test
Guido van Rossum <guido@python.org>
parents: 227
diff changeset
428 static int
fda973f2a512 Added nonzero test
Guido van Rossum <guido@python.org>
parents: 227
diff changeset
429 float_nonzero(v)
fda973f2a512 Added nonzero test
Guido van Rossum <guido@python.org>
parents: 227
diff changeset
430 floatobject *v;
fda973f2a512 Added nonzero test
Guido van Rossum <guido@python.org>
parents: 227
diff changeset
431 {
fda973f2a512 Added nonzero test
Guido van Rossum <guido@python.org>
parents: 227
diff changeset
432 return v->ob_fval != 0.0;
fda973f2a512 Added nonzero test
Guido van Rossum <guido@python.org>
parents: 227
diff changeset
433 }
fda973f2a512 Added nonzero test
Guido van Rossum <guido@python.org>
parents: 227
diff changeset
434
1313
6ee380349c84 * Added gmtime/localtime/mktime and SYSV timezone globals to timemodule.c.
Guido van Rossum <guido@python.org>
parents: 1271
diff changeset
435 static int
955
03de67080c95 * classobject.[ch], {float,long,int}object.c, bltinmodule.c:
Guido van Rossum <guido@python.org>
parents: 795
diff changeset
436 float_coerce(pv, pw)
03de67080c95 * classobject.[ch], {float,long,int}object.c, bltinmodule.c:
Guido van Rossum <guido@python.org>
parents: 795
diff changeset
437 object **pv;
03de67080c95 * classobject.[ch], {float,long,int}object.c, bltinmodule.c:
Guido van Rossum <guido@python.org>
parents: 795
diff changeset
438 object **pw;
03de67080c95 * classobject.[ch], {float,long,int}object.c, bltinmodule.c:
Guido van Rossum <guido@python.org>
parents: 795
diff changeset
439 {
03de67080c95 * classobject.[ch], {float,long,int}object.c, bltinmodule.c:
Guido van Rossum <guido@python.org>
parents: 795
diff changeset
440 if (is_intobject(*pw)) {
03de67080c95 * classobject.[ch], {float,long,int}object.c, bltinmodule.c:
Guido van Rossum <guido@python.org>
parents: 795
diff changeset
441 long x = getintvalue(*pw);
03de67080c95 * classobject.[ch], {float,long,int}object.c, bltinmodule.c:
Guido van Rossum <guido@python.org>
parents: 795
diff changeset
442 *pw = newfloatobject((double)x);
03de67080c95 * classobject.[ch], {float,long,int}object.c, bltinmodule.c:
Guido van Rossum <guido@python.org>
parents: 795
diff changeset
443 INCREF(*pv);
03de67080c95 * classobject.[ch], {float,long,int}object.c, bltinmodule.c:
Guido van Rossum <guido@python.org>
parents: 795
diff changeset
444 return 0;
03de67080c95 * classobject.[ch], {float,long,int}object.c, bltinmodule.c:
Guido van Rossum <guido@python.org>
parents: 795
diff changeset
445 }
03de67080c95 * classobject.[ch], {float,long,int}object.c, bltinmodule.c:
Guido van Rossum <guido@python.org>
parents: 795
diff changeset
446 else if (is_longobject(*pw)) {
03de67080c95 * classobject.[ch], {float,long,int}object.c, bltinmodule.c:
Guido van Rossum <guido@python.org>
parents: 795
diff changeset
447 *pw = newfloatobject(dgetlongvalue(*pw));
03de67080c95 * classobject.[ch], {float,long,int}object.c, bltinmodule.c:
Guido van Rossum <guido@python.org>
parents: 795
diff changeset
448 INCREF(*pv);
03de67080c95 * classobject.[ch], {float,long,int}object.c, bltinmodule.c:
Guido van Rossum <guido@python.org>
parents: 795
diff changeset
449 return 0;
03de67080c95 * classobject.[ch], {float,long,int}object.c, bltinmodule.c:
Guido van Rossum <guido@python.org>
parents: 795
diff changeset
450 }
03de67080c95 * classobject.[ch], {float,long,int}object.c, bltinmodule.c:
Guido van Rossum <guido@python.org>
parents: 795
diff changeset
451 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
452 }
03de67080c95 * classobject.[ch], {float,long,int}object.c, bltinmodule.c:
Guido van Rossum <guido@python.org>
parents: 795
diff changeset
453
1049
2ed511171809 Made builtins int(), long(), float(), oct() and hex() more generic.
Guido van Rossum <guido@python.org>
parents: 955
diff changeset
454 static object *
2ed511171809 Made builtins int(), long(), float(), oct() and hex() more generic.
Guido van Rossum <guido@python.org>
parents: 955
diff changeset
455 float_int(v)
2ed511171809 Made builtins int(), long(), float(), oct() and hex() more generic.
Guido van Rossum <guido@python.org>
parents: 955
diff changeset
456 object *v;
2ed511171809 Made builtins int(), long(), float(), oct() and hex() more generic.
Guido van Rossum <guido@python.org>
parents: 955
diff changeset
457 {
2ed511171809 Made builtins int(), long(), float(), oct() and hex() more generic.
Guido van Rossum <guido@python.org>
parents: 955
diff changeset
458 double x = getfloatvalue(v);
1908
0437738279a8 * Include/classobject.h, Objects/classobject.c, Python/ceval.c:
Guido van Rossum <guido@python.org>
parents: 1775
diff changeset
459 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
460 : (x = floor(x)) > (double)LONG_MAX) {
2327
43f9e7549c70 NeXT/Sparc 3.3 fix
Guido van Rossum <guido@python.org>
parents: 2308
diff changeset
461 err_setstr(OverflowError, "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
462 return NULL;
0437738279a8 * Include/classobject.h, Objects/classobject.c, Python/ceval.c:
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463 }
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464 return newintobject((long)x);
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465 }
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466
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467 static object *
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468 float_long(v)
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469 object *v;
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470 {
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471 double x = getfloatvalue(v);
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472 return dnewlongobject(x);
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473 }
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474
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475 static object *
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476 float_float(v)
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477 object *v;
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478 {
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479 INCREF(v);
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480 return v;
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481 }
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482
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483
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484 static number_methods float_as_number = {
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485 (binaryfunc)float_add, /*nb_add*/
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486 (binaryfunc)float_sub, /*nb_subtract*/
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487 (binaryfunc)float_mul, /*nb_multiply*/
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488 (binaryfunc)float_div, /*nb_divide*/
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489 (binaryfunc)float_rem, /*nb_remainder*/
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490 (binaryfunc)float_divmod, /*nb_divmod*/
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491 (ternaryfunc)float_pow, /*nb_power*/
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492 (unaryfunc)float_neg, /*nb_negative*/
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493 (unaryfunc)float_pos, /*nb_positive*/
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494 (unaryfunc)float_abs, /*nb_absolute*/
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495 (inquiry)float_nonzero, /*nb_nonzero*/
405
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496 0, /*nb_invert*/
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497 0, /*nb_lshift*/
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498 0, /*nb_rshift*/
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499 0, /*nb_and*/
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500 0, /*nb_xor*/
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501 0, /*nb_or*/
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502 (coercion)float_coerce, /*nb_coerce*/
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503 (unaryfunc)float_int, /*nb_int*/
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504 (unaryfunc)float_long, /*nb_long*/
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505 (unaryfunc)float_float, /*nb_float*/
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506 0, /*nb_oct*/
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507 0, /*nb_hex*/
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508 };
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509
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510 typeobject Floattype = {
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511 OB_HEAD_INIT(&Typetype)
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512 0,
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513 "float",
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514 sizeof(floatobject),
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515 0,
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516 (destructor)float_dealloc, /*tp_dealloc*/
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517 (printfunc)float_print, /*tp_print*/
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518 0, /*tp_getattr*/
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519 0, /*tp_setattr*/
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520 (cmpfunc)float_compare, /*tp_compare*/
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521 (reprfunc)float_repr, /*tp_repr*/
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522 &float_as_number, /*tp_as_number*/
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523 0, /*tp_as_sequence*/
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524 0, /*tp_as_mapping*/
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525 (hashfunc)float_hash, /*tp_hash*/
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526 };