Mercurial > cpython-lru_cache-weakref
annotate Modules/mathmodule.c @ 3546:3f7cdf1663f7 legacy-trunk
A version of swed that can import html files. Also demonstrates
implementing object handlers in Python.
| author | Jack Jansen <jack.jansen@cwi.nl> |
|---|---|
| date | Tue, 07 May 1996 15:25:36 +0000 |
| parents | 16cb0473224c |
| children | e07597389d64 |
| 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 |
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36 #ifndef __STDC__ |
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37 extern double fmod PROTO((double, double)); |
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38 extern double frexp PROTO((double, int *)); |
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39 extern double ldexp PROTO((double, int)); |
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40 extern double modf PROTO((double, double *)); |
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41 #endif |
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42 |
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43 #if defined(HAVE_HYPOT) && !defined(NeXT) |
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44 extern double hypot PROTO((double, double)); |
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45 #else |
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46 double hypot(x,y) |
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47 double x; |
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48 double y; |
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49 { |
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50 double yx; |
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51 |
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52 x = fabs(x); |
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53 y = fabs(y); |
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54 if (x < y) { |
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55 double temp = x; |
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56 x = y; |
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57 y = temp; |
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58 } |
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59 if (x == 0.) |
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60 return 0.; |
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61 else { |
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62 yx = y/x; |
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63 return x*sqrt(1.+yx*yx); |
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64 } |
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65 } |
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66 #endif |
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67 |
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68 #ifdef i860 |
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69 /* Cray APP has bogus definition of HUGE_VAL in <math.h> */ |
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70 #undef HUGE_VAL |
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71 #endif |
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72 |
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73 #ifdef HUGE_VAL |
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74 #define CHECK(x) if (errno != 0) ; \ |
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75 else if (-HUGE_VAL <= (x) && (x) <= HUGE_VAL) ; \ |
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76 else errno = ERANGE |
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77 #else |
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78 #define CHECK(x) /* Don't know how to check */ |
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79 #endif |
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80 |
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81 static object * |
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82 math_error() |
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83 { |
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84 if (errno == EDOM) |
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85 err_setstr(ValueError, "math domain error"); |
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86 else if (errno == ERANGE) |
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87 err_setstr(OverflowError, "math range error"); |
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88 else |
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89 err_errno(ValueError); /* Unexpected math error */ |
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90 return NULL; |
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91 } |
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92 |
| 6 | 93 static object * |
| 94 math_1(args, func) | |
| 95 object *args; | |
| 96 double (*func) FPROTO((double)); | |
| 97 { | |
| 98 double x; | |
| 99 if (!getdoublearg(args, &x)) | |
| 100 return NULL; | |
| 101 errno = 0; | |
| 102 x = (*func)(x); | |
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103 CHECK(x); |
| 6 | 104 if (errno != 0) |
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105 return math_error(); |
| 6 | 106 else |
| 107 return newfloatobject(x); | |
| 108 } | |
| 109 | |
| 110 static object * | |
| 111 math_2(args, func) | |
| 112 object *args; | |
| 113 double (*func) FPROTO((double, double)); | |
| 114 { | |
| 115 double x, y; | |
| 116 if (!get2doublearg(args, &x, &y)) | |
| 117 return NULL; | |
| 118 errno = 0; | |
| 119 x = (*func)(x, y); | |
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120 CHECK(x); |
| 6 | 121 if (errno != 0) |
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122 return math_error(); |
| 6 | 123 else |
| 124 return newfloatobject(x); | |
| 125 } | |
| 126 | |
| 127 #define FUNC1(stubname, func) \ | |
| 128 static object * stubname(self, args) object *self, *args; { \ | |
| 129 return math_1(args, func); \ | |
| 130 } | |
| 131 | |
| 132 #define FUNC2(stubname, func) \ | |
| 133 static object * stubname(self, args) object *self, *args; { \ | |
| 134 return math_2(args, func); \ | |
| 135 } | |
| 136 | |
| 137 FUNC1(math_acos, acos) | |
| 138 FUNC1(math_asin, asin) | |
| 139 FUNC1(math_atan, atan) | |
| 140 FUNC2(math_atan2, atan2) | |
| 141 FUNC1(math_ceil, ceil) | |
| 142 FUNC1(math_cos, cos) | |
| 143 FUNC1(math_cosh, cosh) | |
| 144 FUNC1(math_exp, exp) | |
| 145 FUNC1(math_fabs, fabs) | |
| 146 FUNC1(math_floor, floor) | |
| 147 FUNC2(math_fmod, fmod) | |
| 1986 | 148 FUNC2(math_hypot, hypot) |
| 6 | 149 FUNC1(math_log, log) |
| 150 FUNC1(math_log10, log10) | |
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151 #ifdef MPW_3_1 /* This hack is needed for MPW 3.1 but not for 3.2 ... */ |
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152 FUNC2(math_pow, power) |
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153 #else |
| 6 | 154 FUNC2(math_pow, pow) |
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155 #endif |
| 6 | 156 FUNC1(math_sin, sin) |
| 157 FUNC1(math_sinh, sinh) | |
| 158 FUNC1(math_sqrt, sqrt) | |
| 159 FUNC1(math_tan, tan) | |
| 160 FUNC1(math_tanh, tanh) | |
| 161 | |
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162 |
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163 static object * |
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164 math_frexp(self, args) |
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165 object *self; |
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166 object *args; |
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167 { |
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168 double x; |
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169 int i; |
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170 if (!getdoublearg(args, &x)) |
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171 return NULL; |
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172 errno = 0; |
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173 x = frexp(x, &i); |
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174 CHECK(x); |
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175 if (errno != 0) |
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176 return math_error(); |
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177 return mkvalue("(di)", x, i); |
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178 } |
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179 |
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180 static object * |
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181 math_ldexp(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 /* Cheat -- allow float as second argument */ |
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187 if (!get2doublearg(args, &x, &y)) |
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188 return NULL; |
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189 errno = 0; |
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190 x = ldexp(x, (int)y); |
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191 CHECK(x); |
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192 if (errno != 0) |
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193 return math_error(); |
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194 else |
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195 return newfloatobject(x); |
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196 } |
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197 |
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198 static object * |
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199 math_modf(self, args) |
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200 object *self; |
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201 object *args; |
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202 { |
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203 double x, y; |
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204 if (!getdoublearg(args, &x)) |
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205 return NULL; |
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206 errno = 0; |
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207 #ifdef MPW /* MPW C modf expects pointer to extended as second argument */ |
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208 { |
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209 extended e; |
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210 x = modf(x, &e); |
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211 y = e; |
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212 } |
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213 #else |
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214 x = modf(x, &y); |
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215 #endif |
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216 CHECK(x); |
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217 if (errno != 0) |
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218 return math_error(); |
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219 return mkvalue("(dd)", x, y); |
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220 } |
| 6 | 221 |
| 222 static struct methodlist math_methods[] = { | |
| 223 {"acos", math_acos}, | |
| 224 {"asin", math_asin}, | |
| 225 {"atan", math_atan}, | |
| 226 {"atan2", math_atan2}, | |
| 227 {"ceil", math_ceil}, | |
| 228 {"cos", math_cos}, | |
| 229 {"cosh", math_cosh}, | |
| 230 {"exp", math_exp}, | |
| 231 {"fabs", math_fabs}, | |
| 232 {"floor", math_floor}, | |
| 233 {"fmod", math_fmod}, | |
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234 {"frexp", math_frexp}, |
| 1986 | 235 {"hypot", math_hypot}, |
| 6 | 236 {"ldexp", math_ldexp}, |
| 237 {"log", math_log}, | |
| 238 {"log10", math_log10}, | |
| 239 {"modf", math_modf}, | |
| 240 {"pow", math_pow}, | |
| 241 {"sin", math_sin}, | |
| 242 {"sinh", math_sinh}, | |
| 243 {"sqrt", math_sqrt}, | |
| 244 {"tan", math_tan}, | |
| 245 {"tanh", math_tanh}, | |
| 246 {NULL, NULL} /* sentinel */ | |
| 247 }; | |
| 248 | |
| 249 void | |
| 250 initmath() | |
| 251 { | |
| 252 object *m, *d, *v; | |
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253 |
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254 m = initmodule("math", math_methods); |
| 6 | 255 d = getmoduledict(m); |
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256 dictinsert(d, "pi", v = newfloatobject(atan(1.0) * 4.0)); |
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257 DECREF(v); |
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258 dictinsert(d, "e", v = newfloatobject(exp(1.0))); |
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259 DECREF(v); |
| 6 | 260 } |