Mercurial > cpython-lru_cache-weakref

annotate Objects/floatobject.c @ 4503:65d2d8e67da3 legacy-trunk

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New permission notice, includes CNRI.
author Guido van Rossum <guido@python.org>
date Fri, 25 Oct 1996 14:44:06 +0000
parents daf12f64d5aa
children b56bc25aec85
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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 "allobjects.h"
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38 #include "modsupport.h"
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39
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40 #include <errno.h>
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41 #include <ctype.h>
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42 #include "mymath.h"
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43
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44 #ifdef i860
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45 /* Cray APP has bogus definition of HUGE_VAL in <math.h> */
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46 #undef HUGE_VAL
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47 #endif
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48
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49 #if defined(HUGE_VAL) && !defined(CHECK)
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50 #define CHECK(x) if (errno != 0) ; \
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51 else if (-HUGE_VAL <= (x) && (x) <= HUGE_VAL) ; \
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52 else errno = ERANGE
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53 #endif
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54
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55 #ifndef CHECK
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56 #define CHECK(x) /* Don't know how to check */
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57 #endif
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58
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59 #ifdef HAVE_LIMITS_H
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60 #include <limits.h>
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61 #endif
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62
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63 #ifndef LONG_MAX
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64 #define LONG_MAX 0X7FFFFFFFL
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65 #endif
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66
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67 #ifndef LONG_MIN
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68 #define LONG_MIN (-LONG_MAX-1)
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69 #endif
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70
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71 #ifdef __NeXT__
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72 #ifdef __sparc__
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73 /*
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74 * This works around a bug in the NS/Sparc 3.3 pre-release
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75 * limits.h header file.
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76 * 10-Feb-1995 bwarsaw@cnri.reston.va.us
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77 */
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78 #undef LONG_MIN
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79 #define LONG_MIN (-LONG_MAX-1)
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80 #endif
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81 #endif
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82
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83 #if !defined(__STDC__) && !defined(macintosh)
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84 extern double fmod PROTO((double, double));
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85 extern double pow PROTO((double, double));
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86 #endif
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87
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88 object *
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89 #ifdef __SC__
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90 newfloatobject(double fval)
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91 #else
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92 newfloatobject(fval)
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93 double fval;
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94 #endif
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95 {
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96 /* For efficiency, this code is copied from newobject() */
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97 register floatobject *op = (floatobject *) malloc(sizeof(floatobject));
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98 if (op == NULL)
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99 return err_nomem();
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100 op->ob_type = &Floattype;
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101 op->ob_fval = fval;
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102 NEWREF(op);
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103 return (object *) op;
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104 }
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105
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106 static void
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107 float_dealloc(op)
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108 object *op;
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109 {
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110 DEL(op);
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111 }
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112
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113 double
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114 getfloatvalue(op)
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115 object *op;
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116 {
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117 number_methods *nb;
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118 floatobject *fo;
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119 double val;
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120
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121 if (op && is_floatobject(op))
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122 return GETFLOATVALUE((floatobject*) op);
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123
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124 if (op == NULL || (nb = op->ob_type->tp_as_number) == NULL ||
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125 nb->nb_float == NULL) {
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126 err_badarg();
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127 return -1;
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128 }
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129
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130 fo = (floatobject*) (*nb->nb_float) (op);
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131 if (fo == NULL)
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132 return -1;
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133 if (!is_floatobject(fo)) {
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134 err_setstr(TypeError, "nb_float should return float object");
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135 return -1;
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136 }
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137
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138 val = GETFLOATVALUE(fo);
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139 DECREF(fo);
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140
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141 return val;
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142 }
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143
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144 /* Methods */
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145
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146 void
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147 float_buf_repr(buf, v)
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148 char *buf;
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149 floatobject *v;
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150 {
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151 register char *cp;
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152 /* Subroutine for float_repr and float_print.
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153 We want float numbers to be recognizable as such,
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154 i.e., they should contain a decimal point or an exponent.
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155 However, %g may print the number as an integer;
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156 in such cases, we append ".0" to the string. */
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157 sprintf(buf, "%.12g", v->ob_fval);
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158 cp = buf;
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159 if (*cp == '-')
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160 cp++;
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161 for (; *cp != '\0'; cp++) {
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162 /* Any non-digit means it's not an integer;
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163 this takes care of NAN and INF as well. */
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164 if (!isdigit(Py_CHARMASK(*cp)))
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165 break;
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166 }
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167 if (*cp == '\0') {
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168 *cp++ = '.';
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169 *cp++ = '0';
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170 *cp++ = '\0';
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171 }
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172 }
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173
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174 /* ARGSUSED */
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175 static int
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176 float_print(v, fp, flags)
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177 floatobject *v;
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178 FILE *fp;
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179 int flags; /* Not used but required by interface */
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180 {
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181 char buf[100];
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182 float_buf_repr(buf, v);
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183 fputs(buf, fp);
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184 return 0;
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185 }
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186
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187 static object *
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188 float_repr(v)
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189 floatobject *v;
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190 {
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191 char buf[100];
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192 float_buf_repr(buf, v);
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193 return newstringobject(buf);
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194 }
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195
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196 static int
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197 float_compare(v, w)
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198 floatobject *v, *w;
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199 {
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200 double i = v->ob_fval;
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201 double j = w->ob_fval;
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202 return (i < j) ? -1 : (i > j) ? 1 : 0;
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203 }
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204
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205 static long
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206 float_hash(v)
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207 floatobject *v;
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208 {
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209 double intpart, fractpart;
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210 int expo;
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211 long x;
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212 /* This is designed so that Python numbers with the same
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213 value hash to the same value, otherwise comparisons
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214 of mapping keys will turn out weird */
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215
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216 #ifdef MPW /* MPW C modf expects pointer to extended as second argument */
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217 {
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218 extended e;
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219 fractpart = modf(v->ob_fval, &e);
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220 intpart = e;
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221 }
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222 #else
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223 fractpart = modf(v->ob_fval, &intpart);
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224 #endif
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225
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226 if (fractpart == 0.0) {
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227 if (intpart > 0x7fffffffL || -intpart > 0x7fffffffL) {
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228 /* Convert to long int and use its hash... */
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229 object *w = dnewlongobject(v->ob_fval);
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230 if (w == NULL)
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231 return -1;
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232 x = hashobject(w);
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233 DECREF(w);
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234 return x;
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235 }
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236 x = (long)intpart;
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237 }
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238 else {
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239 fractpart = frexp(fractpart, &expo);
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240 fractpart = fractpart*2147483648.0; /* 2**31 */
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241 x = (long) (intpart + fractpart) ^ expo; /* Rather arbitrary */
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242 }
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243 if (x == -1)
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244 x = -2;
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245 return x;
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246 }
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247
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248 static object *
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249 float_add(v, w)
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250 floatobject *v;
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251 floatobject *w;
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252 {
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253 return newfloatobject(v->ob_fval + w->ob_fval);
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254 }
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255
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256 static object *
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257 float_sub(v, w)
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258 floatobject *v;
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259 floatobject *w;
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260 {
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261 return newfloatobject(v->ob_fval - w->ob_fval);
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262 }
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263
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264 static object *
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265 float_mul(v, w)
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266 floatobject *v;
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267 floatobject *w;
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268 {
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269 return newfloatobject(v->ob_fval * w->ob_fval);
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270 }
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271
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272 static object *
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273 float_div(v, w)
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274 floatobject *v;
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275 floatobject *w;
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276 {
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277 if (w->ob_fval == 0) {
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278 err_setstr(ZeroDivisionError, "float division");
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279 return NULL;
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280 }
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281 return newfloatobject(v->ob_fval / w->ob_fval);
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282 }
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283
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284 static object *
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285 float_rem(v, w)
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286 floatobject *v;
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287 floatobject *w;
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288 {
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289 double vx, wx;
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290 double /* div, */ mod;
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291 wx = w->ob_fval;
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292 if (wx == 0.0) {
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293 err_setstr(ZeroDivisionError, "float modulo");
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294 return NULL;
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295 }
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296 vx = v->ob_fval;
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297 mod = fmod(vx, wx);
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298 /* div = (vx - mod) / wx; */
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299 if (wx*mod < 0) {
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300 mod += wx;
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301 /* div -= 1.0; */
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302 }
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303 return newfloatobject(mod);
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304 }
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305
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306 static object *
227
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307 float_divmod(v, w)
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308 floatobject *v;
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diff changeset
309 floatobject *w;
227
7ec6058b539b Added (dummy) divmod and (functional) abs.
Guido van Rossum <guido@python.org>
parents: 145
diff changeset
310 {
391
caf8466dcc9c Finally implemented divmod().
Guido van Rossum <guido@python.org>
parents: 284
diff changeset
311 double vx, wx;
caf8466dcc9c Finally implemented divmod().
Guido van Rossum <guido@python.org>
parents: 284
diff changeset
312 double div, mod;
632
0c1938f2e0c0 Get rid of redundant type checks.
Guido van Rossum <guido@python.org>
parents: 496
diff changeset
313 wx = w->ob_fval;
391
caf8466dcc9c Finally implemented divmod().
Guido van Rossum <guido@python.org>
parents: 284
diff changeset
314 if (wx == 0.0) {
470
a1025cbba30d Formulate better error strings.
Guido van Rossum <guido@python.org>
parents: 405
diff changeset
315 err_setstr(ZeroDivisionError, "float divmod()");
391
caf8466dcc9c Finally implemented divmod().
Guido van Rossum <guido@python.org>
parents: 284
diff changeset
316 return NULL;
caf8466dcc9c Finally implemented divmod().
Guido van Rossum <guido@python.org>
parents: 284
diff changeset
317 }
caf8466dcc9c Finally implemented divmod().
Guido van Rossum <guido@python.org>
parents: 284
diff changeset
318 vx = v->ob_fval;
caf8466dcc9c Finally implemented divmod().
Guido van Rossum <guido@python.org>
parents: 284
diff changeset
319 mod = fmod(vx, wx);
caf8466dcc9c Finally implemented divmod().
Guido van Rossum <guido@python.org>
parents: 284
diff changeset
320 div = (vx - mod) / wx;
caf8466dcc9c Finally implemented divmod().
Guido van Rossum <guido@python.org>
parents: 284
diff changeset
321 if (wx*mod < 0) {
caf8466dcc9c Finally implemented divmod().
Guido van Rossum <guido@python.org>
parents: 284
diff changeset
322 mod += wx;
caf8466dcc9c Finally implemented divmod().
Guido van Rossum <guido@python.org>
parents: 284
diff changeset
323 div -= 1.0;
caf8466dcc9c Finally implemented divmod().
Guido van Rossum <guido@python.org>
parents: 284
diff changeset
324 }
1252
c4cd0d9d8281 * Changed many files to use mkvalue() instead of newtupleobject().
Guido van Rossum <guido@python.org>
parents: 1049
diff changeset
325 return mkvalue("(dd)", div, mod);
227
7ec6058b539b Added (dummy) divmod and (functional) abs.
Guido van Rossum <guido@python.org>
parents: 145
diff changeset
326 }
7ec6058b539b Added (dummy) divmod and (functional) abs.
Guido van Rossum <guido@python.org>
parents: 145
diff changeset
327
3608
8573e65fa948 make some things static
Guido van Rossum <guido@python.org>
parents: 3329
diff changeset
328 static double powu(x, n)
3329
67d347c32fff better power implementation
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parents: 2433
diff changeset
329 double x;
67d347c32fff better power implementation
Guido van Rossum <guido@python.org>
parents: 2433
diff changeset
330 long n;
67d347c32fff better power implementation
Guido van Rossum <guido@python.org>
parents: 2433
diff changeset
331 {
67d347c32fff better power implementation
Guido van Rossum <guido@python.org>
parents: 2433
diff changeset
332 double r = 1.;
67d347c32fff better power implementation
Guido van Rossum <guido@python.org>
parents: 2433
diff changeset
333 double p = x;
67d347c32fff better power implementation
Guido van Rossum <guido@python.org>
parents: 2433
diff changeset
334 long mask = 1;
67d347c32fff better power implementation
Guido van Rossum <guido@python.org>
parents: 2433
diff changeset
335 while (mask > 0 && n >= mask) {
67d347c32fff better power implementation
Guido van Rossum <guido@python.org>
parents: 2433
diff changeset
336 if (n & mask)
67d347c32fff better power implementation
Guido van Rossum <guido@python.org>
parents: 2433
diff changeset
337 r *= p;
67d347c32fff better power implementation
Guido van Rossum <guido@python.org>
parents: 2433
diff changeset
338 mask <<= 1;
67d347c32fff better power implementation
Guido van Rossum <guido@python.org>
parents: 2433
diff changeset
339 p *= p;
67d347c32fff better power implementation
Guido van Rossum <guido@python.org>
parents: 2433
diff changeset
340 }
67d347c32fff better power implementation
Guido van Rossum <guido@python.org>
parents: 2433
diff changeset
341 return r;
67d347c32fff better power implementation
Guido van Rossum <guido@python.org>
parents: 2433
diff changeset
342 }
67d347c32fff better power implementation
Guido van Rossum <guido@python.org>
parents: 2433
diff changeset
343
227
7ec6058b539b Added (dummy) divmod and (functional) abs.
Guido van Rossum <guido@python.org>
parents: 145
diff changeset
344 static object *
1775
17c80a952914 New patches by Andrew to fix various problems
Guido van Rossum <guido@python.org>
parents: 1746
diff changeset
345 float_pow(v, w, z)
6
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
346 floatobject *v;
3329
67d347c32fff better power implementation
Guido van Rossum <guido@python.org>
parents: 2433
diff changeset
347 object *w;
1775
17c80a952914 New patches by Andrew to fix various problems
Guido van Rossum <guido@python.org>
parents: 1746
diff changeset
348 floatobject *z;
6
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
349 {
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
350 double iv, iw, ix;
3329
67d347c32fff better power implementation
Guido van Rossum <guido@python.org>
parents: 2433
diff changeset
351 long intw;
1775
17c80a952914 New patches by Andrew to fix various problems
Guido van Rossum <guido@python.org>
parents: 1746
diff changeset
352 /* 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
353 * 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
354 * 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
355 * [AMK]
17c80a952914 New patches by Andrew to fix various problems
Guido van Rossum <guido@python.org>
parents: 1746
diff changeset
356 */
3329
67d347c32fff better power implementation
Guido van Rossum <guido@python.org>
parents: 2433
diff changeset
357 iv = v->ob_fval;
67d347c32fff better power implementation
Guido van Rossum <guido@python.org>
parents: 2433
diff changeset
358 iw = ((floatobject *)w)->ob_fval;
67d347c32fff better power implementation
Guido van Rossum <guido@python.org>
parents: 2433
diff changeset
359 intw = (long)iw;
4007
1a0aa986f6fa Test for negative # to the nonintegral float power here.
Guido van Rossum <guido@python.org>
parents: 3984
diff changeset
360 if (iw == intw && -10000 < intw && intw < 10000) {
3329
67d347c32fff better power implementation
Guido van Rossum <guido@python.org>
parents: 2433
diff changeset
361 /* 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
362 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
363 if ((object *)z!=None) {
67d347c32fff better power implementation
Guido van Rossum <guido@python.org>
parents: 2433
diff changeset
364 ix=fmod(1.0, z->ob_fval);
67d347c32fff better power implementation
Guido van Rossum <guido@python.org>
parents: 2433
diff changeset
365 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
366 }
67d347c32fff better power implementation
Guido van Rossum <guido@python.org>
parents: 2433
diff changeset
367 else ix=1.0;
67d347c32fff better power implementation
Guido van Rossum <guido@python.org>
parents: 2433
diff changeset
368 return newfloatobject(ix);
249
bab1f5494b8e Fix special cases in pow()
Guido van Rossum <guido@python.org>
parents: 239
diff changeset
369 }
3984
0613f17dcfd8 Correct wrong calculation of pow(0.0, 0.0, negative_number)
Guido van Rossum <guido@python.org>
parents: 3704
diff changeset
370 errno = 0;
4007
1a0aa986f6fa Test for negative # to the nonintegral float power here.
Guido van Rossum <guido@python.org>
parents: 3984
diff changeset
371 if (intw > 0)
1a0aa986f6fa Test for negative # to the nonintegral float power here.
Guido van Rossum <guido@python.org>
parents: 3984
diff changeset
372 ix = powu(iv, intw);
1a0aa986f6fa Test for negative # to the nonintegral float power here.
Guido van Rossum <guido@python.org>
parents: 3984
diff changeset
373 else
1a0aa986f6fa Test for negative # to the nonintegral float power here.
Guido van Rossum <guido@python.org>
parents: 3984
diff changeset
374 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
375 }
0613f17dcfd8 Correct wrong calculation of pow(0.0, 0.0, negative_number)
Guido van Rossum <guido@python.org>
parents: 3704
diff changeset
376 else {
0613f17dcfd8 Correct wrong calculation of pow(0.0, 0.0, negative_number)
Guido van Rossum <guido@python.org>
parents: 3704
diff changeset
377 /* 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
378 if (iv == 0.0) {
67d347c32fff better power implementation
Guido van Rossum <guido@python.org>
parents: 2433
diff changeset
379 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
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 "0.0 to a negative power");
3329
67d347c32fff better power implementation
Guido van Rossum <guido@python.org>
parents: 2433
diff changeset
382 return NULL;
67d347c32fff better power implementation
Guido van Rossum <guido@python.org>
parents: 2433
diff changeset
383 }
67d347c32fff better power implementation
Guido van Rossum <guido@python.org>
parents: 2433
diff changeset
384 return newfloatobject(0.0);
67d347c32fff better power implementation
Guido van Rossum <guido@python.org>
parents: 2433
diff changeset
385 }
4007
1a0aa986f6fa Test for negative # to the nonintegral float power here.
Guido van Rossum <guido@python.org>
parents: 3984
diff changeset
386 if (iv < 0.0) {
1a0aa986f6fa Test for negative # to the nonintegral float power here.
Guido van Rossum <guido@python.org>
parents: 3984
diff changeset
387 err_setstr(ValueError,
1a0aa986f6fa Test for negative # to the nonintegral float power here.
Guido van Rossum <guido@python.org>
parents: 3984
diff changeset
388 "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
389 return NULL;
1a0aa986f6fa Test for negative # to the nonintegral float power here.
Guido van Rossum <guido@python.org>
parents: 3984
diff changeset
390 }
3329
67d347c32fff better power implementation
Guido van Rossum <guido@python.org>
parents: 2433
diff changeset
391 errno = 0;
67d347c32fff better power implementation
Guido van Rossum <guido@python.org>
parents: 2433
diff changeset
392 ix = pow(iv, iw);
249
bab1f5494b8e Fix special cases in pow()
Guido van Rossum <guido@python.org>
parents: 239
diff changeset
393 }
496
0ac392b7f76e Explicitly check for weird values after calling pow().
Guido van Rossum <guido@python.org>
parents: 470
diff changeset
394 CHECK(ix);
27
82c7bab78bb1 New errors.
Guido van Rossum <guido@python.org>
parents: 6
diff changeset
395 if (errno != 0) {
82c7bab78bb1 New errors.
Guido van Rossum <guido@python.org>
parents: 6
diff changeset
396 /* XXX could it be another type of error? */
82c7bab78bb1 New errors.
Guido van Rossum <guido@python.org>
parents: 6
diff changeset
397 err_errno(OverflowError);
6
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
398 return NULL;
27
82c7bab78bb1 New errors.
Guido van Rossum <guido@python.org>
parents: 6
diff changeset
399 }
1775
17c80a952914 New patches by Andrew to fix various problems
Guido van Rossum <guido@python.org>
parents: 1746
diff changeset
400 if ((object *)z!=None) {
17c80a952914 New patches by Andrew to fix various problems
Guido van Rossum <guido@python.org>
parents: 1746
diff changeset
401 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
402 if ( ix!=0 &&
17c80a952914 New patches by Andrew to fix various problems
Guido van Rossum <guido@python.org>
parents: 1746
diff changeset
403 ((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
404 ix+=z->ob_fval;
17c80a952914 New patches by Andrew to fix various problems
Guido van Rossum <guido@python.org>
parents: 1746
diff changeset
405 }
17c80a952914 New patches by Andrew to fix various problems
Guido van Rossum <guido@python.org>
parents: 1746
diff changeset
406 }
27
82c7bab78bb1 New errors.
Guido van Rossum <guido@python.org>
parents: 6
diff changeset
407 return newfloatobject(ix);
6
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_neg(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 {
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
414 return newfloatobject(-v->ob_fval);
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
415 }
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
416
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
417 static object *
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
418 float_pos(v)
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
419 floatobject *v;
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
420 {
227
7ec6058b539b Added (dummy) divmod and (functional) abs.
Guido van Rossum <guido@python.org>
parents: 145
diff changeset
421 INCREF(v);
7ec6058b539b Added (dummy) divmod and (functional) abs.
Guido van Rossum <guido@python.org>
parents: 145
diff changeset
422 return (object *)v;
7ec6058b539b Added (dummy) divmod and (functional) abs.
Guido van Rossum <guido@python.org>
parents: 145
diff changeset
423 }
7ec6058b539b Added (dummy) divmod and (functional) abs.
Guido van Rossum <guido@python.org>
parents: 145
diff changeset
424
7ec6058b539b Added (dummy) divmod and (functional) abs.
Guido van Rossum <guido@python.org>
parents: 145
diff changeset
425 static object *
7ec6058b539b Added (dummy) divmod and (functional) abs.
Guido van Rossum <guido@python.org>
parents: 145
diff changeset
426 float_abs(v)
7ec6058b539b Added (dummy) divmod and (functional) abs.
Guido van Rossum <guido@python.org>
parents: 145
diff changeset
427 floatobject *v;
7ec6058b539b Added (dummy) divmod and (functional) abs.
Guido van Rossum <guido@python.org>
parents: 145
diff changeset
428 {
7ec6058b539b Added (dummy) divmod and (functional) abs.
Guido van Rossum <guido@python.org>
parents: 145
diff changeset
429 if (v->ob_fval < 0)
7ec6058b539b Added (dummy) divmod and (functional) abs.
Guido van Rossum <guido@python.org>
parents: 145
diff changeset
430 return float_neg(v);
7ec6058b539b Added (dummy) divmod and (functional) abs.
Guido van Rossum <guido@python.org>
parents: 145
diff changeset
431 else
7ec6058b539b Added (dummy) divmod and (functional) abs.
Guido van Rossum <guido@python.org>
parents: 145
diff changeset
432 return float_pos(v);
6
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
433 }
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
434
239
fda973f2a512 Added nonzero test
Guido van Rossum <guido@python.org>
parents: 227
diff changeset
435 static int
fda973f2a512 Added nonzero test
Guido van Rossum <guido@python.org>
parents: 227
diff changeset
436 float_nonzero(v)
fda973f2a512 Added nonzero test
Guido van Rossum <guido@python.org>
parents: 227
diff changeset
437 floatobject *v;
fda973f2a512 Added nonzero test
Guido van Rossum <guido@python.org>
parents: 227
diff changeset
438 {
fda973f2a512 Added nonzero test
Guido van Rossum <guido@python.org>
parents: 227
diff changeset
439 return v->ob_fval != 0.0;
fda973f2a512 Added nonzero test
Guido van Rossum <guido@python.org>
parents: 227
diff changeset
440 }
fda973f2a512 Added nonzero test
Guido van Rossum <guido@python.org>
parents: 227
diff changeset
441
1313
6ee380349c84 * Added gmtime/localtime/mktime and SYSV timezone globals to timemodule.c.
Guido van Rossum <guido@python.org>
parents: 1271
diff changeset
442 static int
955
03de67080c95 * classobject.[ch], {float,long,int}object.c, bltinmodule.c:
Guido van Rossum <guido@python.org>
parents: 795
diff changeset
443 float_coerce(pv, pw)
03de67080c95 * classobject.[ch], {float,long,int}object.c, bltinmodule.c:
Guido van Rossum <guido@python.org>
parents: 795
diff changeset
444 object **pv;
03de67080c95 * classobject.[ch], {float,long,int}object.c, bltinmodule.c:
Guido van Rossum <guido@python.org>
parents: 795
diff changeset
445 object **pw;
03de67080c95 * classobject.[ch], {float,long,int}object.c, bltinmodule.c:
Guido van Rossum <guido@python.org>
parents: 795
diff changeset
446 {
03de67080c95 * classobject.[ch], {float,long,int}object.c, bltinmodule.c:
Guido van Rossum <guido@python.org>
parents: 795
diff changeset
447 if (is_intobject(*pw)) {
03de67080c95 * classobject.[ch], {float,long,int}object.c, bltinmodule.c:
Guido van Rossum <guido@python.org>
parents: 795
diff changeset
448 long x = getintvalue(*pw);
03de67080c95 * classobject.[ch], {float,long,int}object.c, bltinmodule.c:
Guido van Rossum <guido@python.org>
parents: 795
diff changeset
449 *pw = newfloatobject((double)x);
03de67080c95 * classobject.[ch], {float,long,int}object.c, bltinmodule.c:
Guido van Rossum <guido@python.org>
parents: 795
diff changeset
450 INCREF(*pv);
03de67080c95 * classobject.[ch], {float,long,int}object.c, bltinmodule.c:
Guido van Rossum <guido@python.org>
parents: 795
diff changeset
451 return 0;
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 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
454 *pw = newfloatobject(dgetlongvalue(*pw));
03de67080c95 * classobject.[ch], {float,long,int}object.c, bltinmodule.c:
Guido van Rossum <guido@python.org>
parents: 795
diff changeset
455 INCREF(*pv);
03de67080c95 * classobject.[ch], {float,long,int}object.c, bltinmodule.c:
Guido van Rossum <guido@python.org>
parents: 795
diff changeset
456 return 0;
03de67080c95 * classobject.[ch], {float,long,int}object.c, bltinmodule.c:
Guido van Rossum <guido@python.org>
parents: 795
diff changeset
457 }
03de67080c95 * classobject.[ch], {float,long,int}object.c, bltinmodule.c:
Guido van Rossum <guido@python.org>
parents: 795
diff changeset
458 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
459 }
03de67080c95 * classobject.[ch], {float,long,int}object.c, bltinmodule.c:
Guido van Rossum <guido@python.org>
parents: 795
diff changeset
460
1049
2ed511171809 Made builtins int(), long(), float(), oct() and hex() more generic.
Guido van Rossum <guido@python.org>
parents: 955
diff changeset
461 static object *
2ed511171809 Made builtins int(), long(), float(), oct() and hex() more generic.
Guido van Rossum <guido@python.org>
parents: 955
diff changeset
462 float_int(v)
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463 object *v;
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464 {
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465 double x = getfloatvalue(v);
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466 if (x < 0 ? (x = ceil(x)) < (double)LONG_MIN
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467 : (x = floor(x)) > (double)LONG_MAX) {
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468 err_setstr(OverflowError, "float too large to convert");
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469 return NULL;
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470 }
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471 return newintobject((long)x);
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472 }
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473
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474 static object *
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475 float_long(v)
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476 object *v;
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477 {
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478 double x = getfloatvalue(v);
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479 return dnewlongobject(x);
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480 }
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481
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482 static object *
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483 float_float(v)
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484 object *v;
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485 {
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486 INCREF(v);
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487 return v;
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488 }
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489
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490
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491 static number_methods float_as_number = {
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492 (binaryfunc)float_add, /*nb_add*/
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493 (binaryfunc)float_sub, /*nb_subtract*/
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494 (binaryfunc)float_mul, /*nb_multiply*/
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495 (binaryfunc)float_div, /*nb_divide*/
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496 (binaryfunc)float_rem, /*nb_remainder*/
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497 (binaryfunc)float_divmod, /*nb_divmod*/
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17c80a952914 New patches by Andrew to fix various problems
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498 (ternaryfunc)float_pow, /*nb_power*/
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499 (unaryfunc)float_neg, /*nb_negative*/
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500 (unaryfunc)float_pos, /*nb_positive*/
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501 (unaryfunc)float_abs, /*nb_absolute*/
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502 (inquiry)float_nonzero, /*nb_nonzero*/
405
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503 0, /*nb_invert*/
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504 0, /*nb_lshift*/
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505 0, /*nb_rshift*/
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506 0, /*nb_and*/
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507 0, /*nb_xor*/
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508 0, /*nb_or*/
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509 (coercion)float_coerce, /*nb_coerce*/
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510 (unaryfunc)float_int, /*nb_int*/
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511 (unaryfunc)float_long, /*nb_long*/
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512 (unaryfunc)float_float, /*nb_float*/
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513 0, /*nb_oct*/
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514 0, /*nb_hex*/
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515 };
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516
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diff changeset
517 typeobject Floattype = {
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518 OB_HEAD_INIT(&Typetype)
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519 0,
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520 "float",
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521 sizeof(floatobject),
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522 0,
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523 (destructor)float_dealloc, /*tp_dealloc*/
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524 (printfunc)float_print, /*tp_print*/
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525 0, /*tp_getattr*/
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526 0, /*tp_setattr*/
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527 (cmpfunc)float_compare, /*tp_compare*/
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528 (reprfunc)float_repr, /*tp_repr*/
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529 &float_as_number, /*tp_as_number*/
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530 0, /*tp_as_sequence*/
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531 0, /*tp_as_mapping*/
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532 (hashfunc)float_hash, /*tp_hash*/
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533 };