Mercurial > cpython-lru_cache-weakref

annotate Modules/mathmodule.c @ 1944:8e8fddcbdfd2 legacy-trunk

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Hopefully the last edits for 1.1
author Guido van Rossum <guido@python.org>
date Thu, 06 Oct 1994 16:15:09 +0000
parents 1940892d2fe3
children 58eef51e3084
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1 /***********************************************************
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2 Copyright 1991, 1992, 1993, 1994 by Stichting Mathematisch Centrum,
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3 Amsterdam, 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
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25 /* Math module -- standard C math library functions, pi and e */
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26
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27 #include "allobjects.h"
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28
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29 #include <errno.h>
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30
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31 #include "modsupport.h"
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32
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33 #define getdoublearg(v, a) getargs(v, "d", a)
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34 #define get2doublearg(v, a, b) getargs(v, "(dd)", a, b)
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35
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36 #include <math.h>
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37
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38 #ifdef i860
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39 /* Cray APP has bogus definition of HUGE_VAL in <math.h> */
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40 #undef HUGE_VAL
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41 #endif
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42
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43 #ifndef macintosh
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44 #ifndef __STDC__
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45 extern double fmod PROTO((double, double));
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46 #endif
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47 #endif
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48
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49 #ifdef HUGE_VAL
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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 #else
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54 #define CHECK(x) /* Don't know how to check */
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55 #endif
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56
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57 static object *
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58 math_error()
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59 {
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60 if (errno == EDOM)
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61 err_setstr(ValueError, "math domain error");
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62 else if (errno == ERANGE)
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63 err_setstr(OverflowError, "math range error");
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64 else
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65 err_errno(ValueError); /* Unexpected math error */
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66 return NULL;
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67 }
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68
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69 static object *
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70 math_1(args, func)
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71 object *args;
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72 double (*func) FPROTO((double));
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73 {
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74 double x;
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75 if (!getdoublearg(args, &x))
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76 return NULL;
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77 errno = 0;
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78 x = (*func)(x);
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79 CHECK(x);
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80 if (errno != 0)
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81 return math_error();
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82 else
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83 return newfloatobject(x);
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84 }
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85
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86 static object *
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87 math_2(args, func)
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88 object *args;
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89 double (*func) FPROTO((double, double));
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90 {
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91 double x, y;
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92 if (!get2doublearg(args, &x, &y))
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93 return NULL;
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94 errno = 0;
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95 x = (*func)(x, y);
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96 CHECK(x);
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97 if (errno != 0)
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98 return math_error();
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99 else
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100 return newfloatobject(x);
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101 }
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102
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103 #define FUNC1(stubname, func) \
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104 static object * stubname(self, args) object *self, *args; { \
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105 return math_1(args, func); \
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106 }
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107
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108 #define FUNC2(stubname, func) \
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109 static object * stubname(self, args) object *self, *args; { \
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110 return math_2(args, func); \
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111 }
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112
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113 FUNC1(math_acos, acos)
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114 FUNC1(math_asin, asin)
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115 FUNC1(math_atan, atan)
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116 FUNC2(math_atan2, atan2)
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117 FUNC1(math_ceil, ceil)
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118 FUNC1(math_cos, cos)
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119 FUNC1(math_cosh, cosh)
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120 FUNC1(math_exp, exp)
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121 FUNC1(math_fabs, fabs)
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122 FUNC1(math_floor, floor)
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123 FUNC2(math_fmod, fmod)
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124 FUNC1(math_log, log)
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125 FUNC1(math_log10, log10)
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126 #ifdef MPW_3_1 /* This hack is needed for MPW 3.1 but not for 3.2 ... */
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127 FUNC2(math_pow, power)
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128 #else
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129 FUNC2(math_pow, pow)
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130 #endif
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131 FUNC1(math_sin, sin)
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132 FUNC1(math_sinh, sinh)
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133 FUNC1(math_sqrt, sqrt)
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134 FUNC1(math_tan, tan)
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135 FUNC1(math_tanh, tanh)
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136
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137 #ifndef macintosh
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138
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139 double frexp PROTO((double, int *));
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140 double ldexp PROTO((double, int));
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141 double modf PROTO((double, double *));
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142
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143 #endif
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144
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145 static object *
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146 math_frexp(self, args)
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147 object *self;
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148 object *args;
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149 {
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150 double x;
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151 int i;
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152 if (!getdoublearg(args, &x))
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153 return NULL;
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154 errno = 0;
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155 x = frexp(x, &i);
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156 CHECK(x);
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157 if (errno != 0)
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158 return math_error();
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159 return mkvalue("(di)", x, i);
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160 }
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161
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162 static object *
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163 math_ldexp(self, args)
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164 object *self;
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165 object *args;
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166 {
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167 double x, y;
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168 /* Cheat -- allow float as second argument */
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169 if (!get2doublearg(args, &x, &y))
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170 return NULL;
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171 errno = 0;
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172 x = ldexp(x, (int)y);
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173 CHECK(x);
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174 if (errno != 0)
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175 return math_error();
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176 else
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177 return newfloatobject(x);
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178 }
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179
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180 static object *
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181 math_modf(self, args)
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182 object *self;
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183 object *args;
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184 {
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185 double x, y;
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186 if (!getdoublearg(args, &x))
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187 return NULL;
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188 errno = 0;
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189 #ifdef MPW /* MPW C modf expects pointer to extended as second argument */
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190 {
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191 extended e;
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192 x = modf(x, &e);
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193 y = e;
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194 }
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195 #else
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196 x = modf(x, &y);
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197 #endif
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198 CHECK(x);
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199 if (errno != 0)
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200 return math_error();
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201 return mkvalue("(dd)", x, y);
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202 }
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203
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204 static struct methodlist math_methods[] = {
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205 {"acos", math_acos},
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206 {"asin", math_asin},
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207 {"atan", math_atan},
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208 {"atan2", math_atan2},
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209 {"ceil", math_ceil},
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210 {"cos", math_cos},
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211 {"cosh", math_cosh},
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212 {"exp", math_exp},
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213 {"fabs", math_fabs},
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214 {"floor", math_floor},
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215 {"fmod", math_fmod},
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216 {"frexp", math_frexp},
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217 {"ldexp", math_ldexp},
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218 {"log", math_log},
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219 {"log10", math_log10},
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220 {"modf", math_modf},
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221 {"pow", math_pow},
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222 {"sin", math_sin},
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223 {"sinh", math_sinh},
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224 {"sqrt", math_sqrt},
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225 {"tan", math_tan},
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226 {"tanh", math_tanh},
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227 {NULL, NULL} /* sentinel */
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228 };
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229
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230 void
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231 initmath()
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232 {
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233 object *m, *d, *v;
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234
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235 m = initmodule("math", math_methods);
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236 d = getmoduledict(m);
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237 dictinsert(d, "pi", v = newfloatobject(atan(1.0) * 4.0));
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238 DECREF(v);
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239 dictinsert(d, "e", v = newfloatobject(exp(1.0)));
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240 DECREF(v);
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241 }