Mercurial > cpython-lru_cache-weakref
annotate Modules/mathmodule.c @ 3930:52c19ee83a6b legacy-trunk
Guido's 1.4b2 fixes: Py_GetProgramName, Py_GetPrefix and Py_GetExecPrefix.
| author | Jack Jansen <jack.jansen@cwi.nl> |
|---|---|
| date | Fri, 02 Aug 1996 15:16:16 +0000 |
| parents | 2da12c9d714f |
| children | fc505f02ad8a |
| rev | line source |
|---|---|
| 145 | 1 /*********************************************************** |
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2 Copyright 1991-1995 by Stichting Mathematisch Centrum, Amsterdam, |
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3 The Netherlands. |
| 145 | 4 |
| 5 All Rights Reserved | |
| 6 | |
| 7 Permission to use, copy, modify, and distribute this software and its | |
| 8 documentation for any purpose and without fee is hereby granted, | |
| 9 provided that the above copyright notice appear in all copies and that | |
| 10 both that copyright notice and this permission notice appear in | |
| 11 supporting documentation, and that the names of Stichting Mathematisch | |
| 12 Centrum or CWI not be used in advertising or publicity pertaining to | |
| 13 distribution of the software without specific, written prior permission. | |
| 14 | |
| 15 STICHTING MATHEMATISCH CENTRUM DISCLAIMS ALL WARRANTIES WITH REGARD TO | |
| 16 THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND | |
| 17 FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH CENTRUM BE LIABLE | |
| 18 FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES | |
| 19 WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN | |
| 20 ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT | |
| 21 OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. | |
| 22 | |
| 23 ******************************************************************/ | |
| 24 | |
| 6 | 25 /* Math module -- standard C math library functions, pi and e */ |
| 26 | |
| 86 | 27 #include "allobjects.h" |
| 6 | 28 |
| 92 | 29 #include <errno.h> |
| 30 | |
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31 #define getdoublearg(v, a) getargs(v, "d", a) |
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32 #define get2doublearg(v, a, b) getargs(v, "(dd)", a, b) |
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33 |
| 2455 | 34 #include "mymath.h" |
| 86 | 35 |
| 3597 | 36 #ifndef _MSC_VER |
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37 #ifndef __STDC__ |
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38 extern double fmod PROTO((double, double)); |
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39 extern double frexp PROTO((double, int *)); |
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40 extern double ldexp PROTO((double, int)); |
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41 extern double modf PROTO((double, double *)); |
| 3597 | 42 #endif /* __STDC__ */ |
| 43 #endif /* _MSC_VER */ | |
| 44 | |
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45 |
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46 #if defined(HAVE_HYPOT) |
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47 extern double hypot PROTO((double, double)); |
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48 #else |
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49 double hypot(x,y) |
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50 double x; |
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51 double y; |
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52 { |
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53 double yx; |
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54 |
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55 x = fabs(x); |
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56 y = fabs(y); |
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57 if (x < y) { |
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58 double temp = x; |
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59 x = y; |
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60 y = temp; |
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61 } |
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62 if (x == 0.) |
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63 return 0.; |
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64 else { |
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65 yx = y/x; |
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66 return x*sqrt(1.+yx*yx); |
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67 } |
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68 } |
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69 #endif |
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70 |
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71 #ifdef i860 |
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72 /* Cray APP has bogus definition of HUGE_VAL in <math.h> */ |
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73 #undef HUGE_VAL |
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74 #endif |
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75 |
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76 #ifdef HUGE_VAL |
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77 #define CHECK(x) if (errno != 0) ; \ |
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78 else if (-HUGE_VAL <= (x) && (x) <= HUGE_VAL) ; \ |
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79 else errno = ERANGE |
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80 #else |
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81 #define CHECK(x) /* Don't know how to check */ |
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82 #endif |
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83 |
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84 static object * |
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85 math_error() |
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86 { |
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87 if (errno == EDOM) |
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88 err_setstr(ValueError, "math domain error"); |
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89 else if (errno == ERANGE) |
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90 err_setstr(OverflowError, "math range error"); |
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91 else |
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92 err_errno(ValueError); /* Unexpected math error */ |
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93 return NULL; |
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94 } |
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95 |
| 6 | 96 static object * |
| 97 math_1(args, func) | |
| 98 object *args; | |
| 99 double (*func) FPROTO((double)); | |
| 100 { | |
| 101 double x; | |
| 102 if (!getdoublearg(args, &x)) | |
| 103 return NULL; | |
| 104 errno = 0; | |
| 105 x = (*func)(x); | |
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106 CHECK(x); |
| 6 | 107 if (errno != 0) |
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108 return math_error(); |
| 6 | 109 else |
| 110 return newfloatobject(x); | |
| 111 } | |
| 112 | |
| 113 static object * | |
| 114 math_2(args, func) | |
| 115 object *args; | |
| 116 double (*func) FPROTO((double, double)); | |
| 117 { | |
| 118 double x, y; | |
| 119 if (!get2doublearg(args, &x, &y)) | |
| 120 return NULL; | |
| 121 errno = 0; | |
| 122 x = (*func)(x, y); | |
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123 CHECK(x); |
| 6 | 124 if (errno != 0) |
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125 return math_error(); |
| 6 | 126 else |
| 127 return newfloatobject(x); | |
| 128 } | |
| 129 | |
| 130 #define FUNC1(stubname, func) \ | |
| 131 static object * stubname(self, args) object *self, *args; { \ | |
| 132 return math_1(args, func); \ | |
| 133 } | |
| 134 | |
| 135 #define FUNC2(stubname, func) \ | |
| 136 static object * stubname(self, args) object *self, *args; { \ | |
| 137 return math_2(args, func); \ | |
| 138 } | |
| 139 | |
| 140 FUNC1(math_acos, acos) | |
| 141 FUNC1(math_asin, asin) | |
| 142 FUNC1(math_atan, atan) | |
| 143 FUNC2(math_atan2, atan2) | |
| 144 FUNC1(math_ceil, ceil) | |
| 145 FUNC1(math_cos, cos) | |
| 146 FUNC1(math_cosh, cosh) | |
| 147 FUNC1(math_exp, exp) | |
| 148 FUNC1(math_fabs, fabs) | |
| 149 FUNC1(math_floor, floor) | |
| 150 FUNC2(math_fmod, fmod) | |
| 1986 | 151 FUNC2(math_hypot, hypot) |
| 6 | 152 FUNC1(math_log, log) |
| 153 FUNC1(math_log10, log10) | |
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154 #ifdef MPW_3_1 /* This hack is needed for MPW 3.1 but not for 3.2 ... */ |
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155 FUNC2(math_pow, power) |
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156 #else |
| 6 | 157 FUNC2(math_pow, pow) |
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158 #endif |
| 6 | 159 FUNC1(math_sin, sin) |
| 160 FUNC1(math_sinh, sinh) | |
| 161 FUNC1(math_sqrt, sqrt) | |
| 162 FUNC1(math_tan, tan) | |
| 163 FUNC1(math_tanh, tanh) | |
| 164 | |
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165 |
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166 static object * |
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167 math_frexp(self, args) |
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168 object *self; |
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169 object *args; |
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170 { |
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171 double x; |
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172 int i; |
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173 if (!getdoublearg(args, &x)) |
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174 return NULL; |
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175 errno = 0; |
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176 x = frexp(x, &i); |
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177 CHECK(x); |
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178 if (errno != 0) |
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179 return math_error(); |
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180 return mkvalue("(di)", x, i); |
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181 } |
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182 |
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183 static object * |
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184 math_ldexp(self, args) |
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185 object *self; |
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186 object *args; |
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187 { |
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188 double x, y; |
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189 /* Cheat -- allow float as second argument */ |
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190 if (!get2doublearg(args, &x, &y)) |
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191 return NULL; |
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192 errno = 0; |
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193 x = ldexp(x, (int)y); |
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194 CHECK(x); |
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195 if (errno != 0) |
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196 return math_error(); |
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197 else |
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198 return newfloatobject(x); |
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199 } |
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200 |
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201 static object * |
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202 math_modf(self, args) |
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203 object *self; |
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204 object *args; |
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205 { |
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206 double x, y; |
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207 if (!getdoublearg(args, &x)) |
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208 return NULL; |
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209 errno = 0; |
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210 #ifdef MPW /* MPW C modf expects pointer to extended as second argument */ |
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211 { |
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212 extended e; |
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213 x = modf(x, &e); |
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214 y = e; |
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215 } |
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216 #else |
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217 x = modf(x, &y); |
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218 #endif |
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219 CHECK(x); |
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220 if (errno != 0) |
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221 return math_error(); |
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222 return mkvalue("(dd)", x, y); |
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223 } |
| 6 | 224 |
| 225 static struct methodlist math_methods[] = { | |
| 226 {"acos", math_acos}, | |
| 227 {"asin", math_asin}, | |
| 228 {"atan", math_atan}, | |
| 229 {"atan2", math_atan2}, | |
| 230 {"ceil", math_ceil}, | |
| 231 {"cos", math_cos}, | |
| 232 {"cosh", math_cosh}, | |
| 233 {"exp", math_exp}, | |
| 234 {"fabs", math_fabs}, | |
| 235 {"floor", math_floor}, | |
| 236 {"fmod", math_fmod}, | |
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237 {"frexp", math_frexp}, |
| 1986 | 238 {"hypot", math_hypot}, |
| 6 | 239 {"ldexp", math_ldexp}, |
| 240 {"log", math_log}, | |
| 241 {"log10", math_log10}, | |
| 242 {"modf", math_modf}, | |
| 243 {"pow", math_pow}, | |
| 244 {"sin", math_sin}, | |
| 245 {"sinh", math_sinh}, | |
| 246 {"sqrt", math_sqrt}, | |
| 247 {"tan", math_tan}, | |
| 248 {"tanh", math_tanh}, | |
| 249 {NULL, NULL} /* sentinel */ | |
| 250 }; | |
| 251 | |
| 252 void | |
| 253 initmath() | |
| 254 { | |
| 255 object *m, *d, *v; | |
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256 |
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257 m = initmodule("math", math_methods); |
| 6 | 258 d = getmoduledict(m); |
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259 dictinsert(d, "pi", v = newfloatobject(atan(1.0) * 4.0)); |
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260 DECREF(v); |
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261 dictinsert(d, "e", v = newfloatobject(exp(1.0))); |
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262 DECREF(v); |
| 6 | 263 } |