Guido van Rossum | f70e43a | 1991-02-19 12:39:46 +0000 | [diff] [blame] | 1 | /*********************************************************** |
Guido van Rossum | 6610ad9 | 1995-01-04 19:07:38 +0000 | [diff] [blame] | 2 | Copyright 1991-1995 by Stichting Mathematisch Centrum, Amsterdam, |
| 3 | The Netherlands. |
Guido van Rossum | f70e43a | 1991-02-19 12:39:46 +0000 | [diff] [blame] | 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 | |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 25 | /* Float object implementation */ |
| 26 | |
Guido van Rossum | 2a9096b | 1990-10-21 22:15:08 +0000 | [diff] [blame] | 27 | /* XXX There should be overflow checks here, but it's hard to check |
| 28 | for any kind of float exception without losing portability. */ |
| 29 | |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 30 | #include "allobjects.h" |
Guido van Rossum | e537240 | 1993-03-16 12:15:04 +0000 | [diff] [blame] | 31 | #include "modsupport.h" |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 32 | |
Guido van Rossum | c211ee4 | 1990-12-20 23:06:26 +0000 | [diff] [blame] | 33 | #include <errno.h> |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 34 | #include <ctype.h> |
Guido van Rossum | 07e3a7e | 1995-02-27 10:13:37 +0000 | [diff] [blame] | 35 | #include "mymath.h" |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 36 | |
Guido van Rossum | 9575a44 | 1993-04-07 14:06:14 +0000 | [diff] [blame] | 37 | #ifdef i860 |
| 38 | /* Cray APP has bogus definition of HUGE_VAL in <math.h> */ |
| 39 | #undef HUGE_VAL |
| 40 | #endif |
| 41 | |
Guido van Rossum | 7fa52f8 | 1991-12-16 15:43:14 +0000 | [diff] [blame] | 42 | #ifdef HUGE_VAL |
| 43 | #define CHECK(x) if (errno != 0) ; \ |
| 44 | else if (-HUGE_VAL <= (x) && (x) <= HUGE_VAL) ; \ |
| 45 | else errno = ERANGE |
| 46 | #else |
| 47 | #define CHECK(x) /* Don't know how to check */ |
| 48 | #endif |
| 49 | |
Guido van Rossum | 03093a2 | 1994-09-28 15:51:32 +0000 | [diff] [blame] | 50 | #ifdef HAVE_LIMITS_H |
| 51 | #include <limits.h> |
| 52 | #endif |
| 53 | |
| 54 | #ifndef LONG_MAX |
| 55 | #define LONG_MAX 0X7FFFFFFFL |
| 56 | #endif |
| 57 | |
| 58 | #ifndef LONG_MIN |
| 59 | #define LONG_MIN (-LONG_MAX-1) |
| 60 | #endif |
| 61 | |
Guido van Rossum | 67ca701 | 1995-02-13 16:38:41 +0000 | [diff] [blame] | 62 | #ifdef __NeXT__ |
| 63 | #ifdef __sparc__ |
| 64 | /* |
| 65 | * This works around a bug in the NS/Sparc 3.3 pre-release |
| 66 | * limits.h header file. |
| 67 | * 10-Feb-1995 bwarsaw@cnri.reston.va.us |
| 68 | */ |
| 69 | #undef LONG_MIN |
| 70 | #define LONG_MIN (-LONG_MAX-1) |
| 71 | #endif |
| 72 | #endif |
| 73 | |
Guido van Rossum | 07e3a7e | 1995-02-27 10:13:37 +0000 | [diff] [blame] | 74 | #if !defined(__STDC__) && !defined(macintosh) |
Guido van Rossum | 6923e13 | 1990-11-02 17:50:43 +0000 | [diff] [blame] | 75 | extern double fmod PROTO((double, double)); |
| 76 | extern double pow PROTO((double, double)); |
| 77 | #endif |
| 78 | |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 79 | object * |
Guido van Rossum | 07e3a7e | 1995-02-27 10:13:37 +0000 | [diff] [blame] | 80 | #ifdef __SC__ |
| 81 | newfloatobject(double fval) |
| 82 | #else |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 83 | newfloatobject(fval) |
| 84 | double fval; |
Guido van Rossum | 07e3a7e | 1995-02-27 10:13:37 +0000 | [diff] [blame] | 85 | #endif |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 86 | { |
| 87 | /* For efficiency, this code is copied from newobject() */ |
| 88 | register floatobject *op = (floatobject *) malloc(sizeof(floatobject)); |
Guido van Rossum | 2a9096b | 1990-10-21 22:15:08 +0000 | [diff] [blame] | 89 | if (op == NULL) |
| 90 | return err_nomem(); |
Guido van Rossum | 2a9096b | 1990-10-21 22:15:08 +0000 | [diff] [blame] | 91 | op->ob_type = &Floattype; |
| 92 | op->ob_fval = fval; |
Sjoerd Mullender | a9c3c22 | 1993-10-11 12:54:31 +0000 | [diff] [blame] | 93 | NEWREF(op); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 94 | return (object *) op; |
| 95 | } |
| 96 | |
Guido van Rossum | 234f942 | 1993-06-17 12:35:49 +0000 | [diff] [blame] | 97 | static void |
Guido van Rossum | 3132a5a | 1992-03-27 17:28:44 +0000 | [diff] [blame] | 98 | float_dealloc(op) |
| 99 | object *op; |
| 100 | { |
| 101 | DEL(op); |
| 102 | } |
| 103 | |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 104 | double |
| 105 | getfloatvalue(op) |
| 106 | object *op; |
| 107 | { |
Guido van Rossum | b6775db | 1994-08-01 11:34:53 +0000 | [diff] [blame] | 108 | number_methods *nb; |
| 109 | floatobject *fo; |
| 110 | double val; |
| 111 | |
| 112 | if (op && is_floatobject(op)) |
| 113 | return GETFLOATVALUE((floatobject*) op); |
| 114 | |
| 115 | if (op == NULL || (nb = op->ob_type->tp_as_number) == NULL || |
| 116 | nb->nb_float == NULL) { |
Guido van Rossum | 2a9096b | 1990-10-21 22:15:08 +0000 | [diff] [blame] | 117 | err_badarg(); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 118 | return -1; |
| 119 | } |
Guido van Rossum | b6775db | 1994-08-01 11:34:53 +0000 | [diff] [blame] | 120 | |
| 121 | fo = (floatobject*) (*nb->nb_float) (op); |
| 122 | if (fo == NULL) |
| 123 | return -1; |
| 124 | if (!is_floatobject(fo)) { |
| 125 | err_setstr(TypeError, "nb_float should return float object"); |
| 126 | return -1; |
| 127 | } |
| 128 | |
| 129 | val = GETFLOATVALUE(fo); |
| 130 | DECREF(fo); |
| 131 | |
| 132 | return val; |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 133 | } |
| 134 | |
| 135 | /* Methods */ |
| 136 | |
Guido van Rossum | 27dec7e | 1991-06-04 19:42:53 +0000 | [diff] [blame] | 137 | void |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 138 | float_buf_repr(buf, v) |
| 139 | char *buf; |
| 140 | floatobject *v; |
| 141 | { |
| 142 | register char *cp; |
| 143 | /* Subroutine for float_repr and float_print. |
| 144 | We want float numbers to be recognizable as such, |
| 145 | i.e., they should contain a decimal point or an exponent. |
| 146 | However, %g may print the number as an integer; |
| 147 | in such cases, we append ".0" to the string. */ |
| 148 | sprintf(buf, "%.12g", v->ob_fval); |
| 149 | cp = buf; |
| 150 | if (*cp == '-') |
| 151 | cp++; |
| 152 | for (; *cp != '\0'; cp++) { |
| 153 | /* Any non-digit means it's not an integer; |
| 154 | this takes care of NAN and INF as well. */ |
Guido van Rossum | 9fa2c11 | 1995-02-10 17:00:37 +0000 | [diff] [blame] | 155 | if (!isdigit(Py_CHARMASK(*cp))) |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 156 | break; |
| 157 | } |
| 158 | if (*cp == '\0') { |
| 159 | *cp++ = '.'; |
| 160 | *cp++ = '0'; |
| 161 | *cp++ = '\0'; |
| 162 | } |
| 163 | } |
| 164 | |
Guido van Rossum | 3132a5a | 1992-03-27 17:28:44 +0000 | [diff] [blame] | 165 | /* ARGSUSED */ |
Guido van Rossum | 9093361 | 1991-06-07 16:10:43 +0000 | [diff] [blame] | 166 | static int |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 167 | float_print(v, fp, flags) |
| 168 | floatobject *v; |
| 169 | FILE *fp; |
Guido van Rossum | 3132a5a | 1992-03-27 17:28:44 +0000 | [diff] [blame] | 170 | int flags; /* Not used but required by interface */ |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 171 | { |
| 172 | char buf[100]; |
| 173 | float_buf_repr(buf, v); |
| 174 | fputs(buf, fp); |
Guido van Rossum | 9093361 | 1991-06-07 16:10:43 +0000 | [diff] [blame] | 175 | return 0; |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 176 | } |
| 177 | |
| 178 | static object * |
| 179 | float_repr(v) |
| 180 | floatobject *v; |
| 181 | { |
| 182 | char buf[100]; |
| 183 | float_buf_repr(buf, v); |
| 184 | return newstringobject(buf); |
| 185 | } |
| 186 | |
| 187 | static int |
| 188 | float_compare(v, w) |
| 189 | floatobject *v, *w; |
| 190 | { |
| 191 | double i = v->ob_fval; |
| 192 | double j = w->ob_fval; |
| 193 | return (i < j) ? -1 : (i > j) ? 1 : 0; |
| 194 | } |
| 195 | |
Guido van Rossum | 9bfef44 | 1993-03-29 10:43:31 +0000 | [diff] [blame] | 196 | static long |
| 197 | float_hash(v) |
| 198 | floatobject *v; |
| 199 | { |
| 200 | double intpart, fractpart; |
| 201 | int expo; |
| 202 | long x; |
| 203 | /* This is designed so that Python numbers with the same |
| 204 | value hash to the same value, otherwise comparisons |
| 205 | of mapping keys will turn out weird */ |
Guido van Rossum | b6775db | 1994-08-01 11:34:53 +0000 | [diff] [blame] | 206 | |
| 207 | #ifdef MPW /* MPW C modf expects pointer to extended as second argument */ |
| 208 | { |
| 209 | extended e; |
| 210 | fractpart = modf(v->ob_fval, &e); |
| 211 | intpart = e; |
| 212 | } |
| 213 | #else |
Guido van Rossum | 9bfef44 | 1993-03-29 10:43:31 +0000 | [diff] [blame] | 214 | fractpart = modf(v->ob_fval, &intpart); |
Guido van Rossum | b6775db | 1994-08-01 11:34:53 +0000 | [diff] [blame] | 215 | #endif |
| 216 | |
Guido van Rossum | 9bfef44 | 1993-03-29 10:43:31 +0000 | [diff] [blame] | 217 | if (fractpart == 0.0) { |
| 218 | if (intpart > 0x7fffffffL || -intpart > 0x7fffffffL) { |
| 219 | /* Convert to long int and use its hash... */ |
| 220 | object *w = dnewlongobject(v->ob_fval); |
| 221 | if (w == NULL) |
| 222 | return -1; |
| 223 | x = hashobject(w); |
| 224 | DECREF(w); |
| 225 | return x; |
| 226 | } |
| 227 | x = (long)intpart; |
| 228 | } |
| 229 | else { |
| 230 | fractpart = frexp(fractpart, &expo); |
Guido van Rossum | 6610ad9 | 1995-01-04 19:07:38 +0000 | [diff] [blame] | 231 | fractpart = fractpart*2147483648.0; /* 2**31 */ |
Guido van Rossum | 9bfef44 | 1993-03-29 10:43:31 +0000 | [diff] [blame] | 232 | x = (long) (intpart + fractpart) ^ expo; /* Rather arbitrary */ |
| 233 | } |
| 234 | if (x == -1) |
| 235 | x = -2; |
| 236 | return x; |
| 237 | } |
| 238 | |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 239 | static object * |
| 240 | float_add(v, w) |
| 241 | floatobject *v; |
Guido van Rossum | 56cd67a | 1992-01-26 18:16:35 +0000 | [diff] [blame] | 242 | floatobject *w; |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 243 | { |
Guido van Rossum | 56cd67a | 1992-01-26 18:16:35 +0000 | [diff] [blame] | 244 | return newfloatobject(v->ob_fval + w->ob_fval); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 245 | } |
| 246 | |
| 247 | static object * |
| 248 | float_sub(v, w) |
| 249 | floatobject *v; |
Guido van Rossum | 56cd67a | 1992-01-26 18:16:35 +0000 | [diff] [blame] | 250 | floatobject *w; |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 251 | { |
Guido van Rossum | 56cd67a | 1992-01-26 18:16:35 +0000 | [diff] [blame] | 252 | return newfloatobject(v->ob_fval - w->ob_fval); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 253 | } |
| 254 | |
| 255 | static object * |
| 256 | float_mul(v, w) |
| 257 | floatobject *v; |
Guido van Rossum | 56cd67a | 1992-01-26 18:16:35 +0000 | [diff] [blame] | 258 | floatobject *w; |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 259 | { |
Guido van Rossum | 56cd67a | 1992-01-26 18:16:35 +0000 | [diff] [blame] | 260 | return newfloatobject(v->ob_fval * w->ob_fval); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 261 | } |
| 262 | |
| 263 | static object * |
| 264 | float_div(v, w) |
| 265 | floatobject *v; |
Guido van Rossum | 56cd67a | 1992-01-26 18:16:35 +0000 | [diff] [blame] | 266 | floatobject *w; |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 267 | { |
Guido van Rossum | 56cd67a | 1992-01-26 18:16:35 +0000 | [diff] [blame] | 268 | if (w->ob_fval == 0) { |
Guido van Rossum | 9a9fadd | 1991-12-10 13:56:55 +0000 | [diff] [blame] | 269 | err_setstr(ZeroDivisionError, "float division"); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 270 | return NULL; |
| 271 | } |
Guido van Rossum | 56cd67a | 1992-01-26 18:16:35 +0000 | [diff] [blame] | 272 | return newfloatobject(v->ob_fval / w->ob_fval); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 273 | } |
| 274 | |
| 275 | static object * |
| 276 | float_rem(v, w) |
| 277 | floatobject *v; |
Guido van Rossum | 56cd67a | 1992-01-26 18:16:35 +0000 | [diff] [blame] | 278 | floatobject *w; |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 279 | { |
Guido van Rossum | 56cd67a | 1992-01-26 18:16:35 +0000 | [diff] [blame] | 280 | double vx, wx; |
Guido van Rossum | 3132a5a | 1992-03-27 17:28:44 +0000 | [diff] [blame] | 281 | double /* div, */ mod; |
Guido van Rossum | 56cd67a | 1992-01-26 18:16:35 +0000 | [diff] [blame] | 282 | wx = w->ob_fval; |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 283 | if (wx == 0.0) { |
Guido van Rossum | 56cd67a | 1992-01-26 18:16:35 +0000 | [diff] [blame] | 284 | err_setstr(ZeroDivisionError, "float modulo"); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 285 | return NULL; |
| 286 | } |
Guido van Rossum | 56cd67a | 1992-01-26 18:16:35 +0000 | [diff] [blame] | 287 | vx = v->ob_fval; |
| 288 | mod = fmod(vx, wx); |
Guido van Rossum | 3132a5a | 1992-03-27 17:28:44 +0000 | [diff] [blame] | 289 | /* div = (vx - mod) / wx; */ |
Guido van Rossum | 56cd67a | 1992-01-26 18:16:35 +0000 | [diff] [blame] | 290 | if (wx*mod < 0) { |
| 291 | mod += wx; |
Guido van Rossum | 3132a5a | 1992-03-27 17:28:44 +0000 | [diff] [blame] | 292 | /* div -= 1.0; */ |
Guido van Rossum | 56cd67a | 1992-01-26 18:16:35 +0000 | [diff] [blame] | 293 | } |
| 294 | return newfloatobject(mod); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 295 | } |
| 296 | |
| 297 | static object * |
Guido van Rossum | eba1b5e | 1991-05-05 20:07:00 +0000 | [diff] [blame] | 298 | float_divmod(v, w) |
| 299 | floatobject *v; |
Guido van Rossum | 56cd67a | 1992-01-26 18:16:35 +0000 | [diff] [blame] | 300 | floatobject *w; |
Guido van Rossum | eba1b5e | 1991-05-05 20:07:00 +0000 | [diff] [blame] | 301 | { |
Guido van Rossum | 15ecff4 | 1991-10-20 20:16:45 +0000 | [diff] [blame] | 302 | double vx, wx; |
| 303 | double div, mod; |
Guido van Rossum | 56cd67a | 1992-01-26 18:16:35 +0000 | [diff] [blame] | 304 | wx = w->ob_fval; |
Guido van Rossum | 15ecff4 | 1991-10-20 20:16:45 +0000 | [diff] [blame] | 305 | if (wx == 0.0) { |
Guido van Rossum | 9a9fadd | 1991-12-10 13:56:55 +0000 | [diff] [blame] | 306 | err_setstr(ZeroDivisionError, "float divmod()"); |
Guido van Rossum | 15ecff4 | 1991-10-20 20:16:45 +0000 | [diff] [blame] | 307 | return NULL; |
| 308 | } |
| 309 | vx = v->ob_fval; |
| 310 | mod = fmod(vx, wx); |
| 311 | div = (vx - mod) / wx; |
| 312 | if (wx*mod < 0) { |
| 313 | mod += wx; |
| 314 | div -= 1.0; |
| 315 | } |
Guido van Rossum | e537240 | 1993-03-16 12:15:04 +0000 | [diff] [blame] | 316 | return mkvalue("(dd)", div, mod); |
Guido van Rossum | eba1b5e | 1991-05-05 20:07:00 +0000 | [diff] [blame] | 317 | } |
| 318 | |
| 319 | static object * |
Guido van Rossum | 0b7d02a | 1994-08-12 12:52:35 +0000 | [diff] [blame] | 320 | float_pow(v, w, z) |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 321 | floatobject *v; |
Guido van Rossum | 56cd67a | 1992-01-26 18:16:35 +0000 | [diff] [blame] | 322 | floatobject *w; |
Guido van Rossum | 0b7d02a | 1994-08-12 12:52:35 +0000 | [diff] [blame] | 323 | floatobject *z; |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 324 | { |
| 325 | double iv, iw, ix; |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 326 | iv = v->ob_fval; |
Guido van Rossum | 56cd67a | 1992-01-26 18:16:35 +0000 | [diff] [blame] | 327 | iw = w->ob_fval; |
Guido van Rossum | 0b7d02a | 1994-08-12 12:52:35 +0000 | [diff] [blame] | 328 | /* XXX Doesn't handle overflows if z!=None yet; it may never do so :( |
| 329 | * The z parameter is really only going to be useful for integers and |
| 330 | * long integers. Maybe something clever with logarithms could be done. |
| 331 | * [AMK] |
| 332 | */ |
Guido van Rossum | 70d9346 | 1991-05-28 21:57:39 +0000 | [diff] [blame] | 333 | /* Sort out special cases here instead of relying on pow() */ |
Guido van Rossum | 0b7d02a | 1994-08-12 12:52:35 +0000 | [diff] [blame] | 334 | if (iw == 0.0) { /* x**0 is 1, even 0**0 */ |
| 335 | if ((object *)z!=None) { |
| 336 | ix=fmod(1.0, z->ob_fval); |
| 337 | if (ix!=0 && z->ob_fval<0) ix+=z->ob_fval; |
| 338 | } |
| 339 | else ix=1.0; |
| 340 | return newfloatobject(ix); |
| 341 | } |
Guido van Rossum | 70d9346 | 1991-05-28 21:57:39 +0000 | [diff] [blame] | 342 | if (iv == 0.0) { |
| 343 | if (iw < 0.0) { |
Guido van Rossum | 0b7d02a | 1994-08-12 12:52:35 +0000 | [diff] [blame] | 344 | err_setstr(ValueError, "0.0 to a negative power"); |
Guido van Rossum | 70d9346 | 1991-05-28 21:57:39 +0000 | [diff] [blame] | 345 | return NULL; |
| 346 | } |
| 347 | return newfloatobject(0.0); |
| 348 | } |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 349 | errno = 0; |
| 350 | ix = pow(iv, iw); |
Guido van Rossum | 7fa52f8 | 1991-12-16 15:43:14 +0000 | [diff] [blame] | 351 | CHECK(ix); |
Guido van Rossum | 2a9096b | 1990-10-21 22:15:08 +0000 | [diff] [blame] | 352 | if (errno != 0) { |
| 353 | /* XXX could it be another type of error? */ |
| 354 | err_errno(OverflowError); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 355 | return NULL; |
Guido van Rossum | 2a9096b | 1990-10-21 22:15:08 +0000 | [diff] [blame] | 356 | } |
Guido van Rossum | 0b7d02a | 1994-08-12 12:52:35 +0000 | [diff] [blame] | 357 | if ((object *)z!=None) { |
| 358 | ix=fmod(ix, z->ob_fval); /* XXX To Be Rewritten */ |
| 359 | if ( ix!=0 && |
| 360 | ((iv<0 && z->ob_fval>0) || (iv>0 && z->ob_fval<0) )) { |
| 361 | ix+=z->ob_fval; |
| 362 | } |
| 363 | } |
Guido van Rossum | 2a9096b | 1990-10-21 22:15:08 +0000 | [diff] [blame] | 364 | return newfloatobject(ix); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 365 | } |
| 366 | |
| 367 | static object * |
| 368 | float_neg(v) |
| 369 | floatobject *v; |
| 370 | { |
| 371 | return newfloatobject(-v->ob_fval); |
| 372 | } |
| 373 | |
| 374 | static object * |
| 375 | float_pos(v) |
| 376 | floatobject *v; |
| 377 | { |
Guido van Rossum | eba1b5e | 1991-05-05 20:07:00 +0000 | [diff] [blame] | 378 | INCREF(v); |
| 379 | return (object *)v; |
| 380 | } |
| 381 | |
| 382 | static object * |
| 383 | float_abs(v) |
| 384 | floatobject *v; |
| 385 | { |
| 386 | if (v->ob_fval < 0) |
| 387 | return float_neg(v); |
| 388 | else |
| 389 | return float_pos(v); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 390 | } |
| 391 | |
Guido van Rossum | 50b4ef6 | 1991-05-14 11:57:01 +0000 | [diff] [blame] | 392 | static int |
| 393 | float_nonzero(v) |
| 394 | floatobject *v; |
| 395 | { |
| 396 | return v->ob_fval != 0.0; |
| 397 | } |
| 398 | |
Guido van Rossum | 234f942 | 1993-06-17 12:35:49 +0000 | [diff] [blame] | 399 | static int |
Guido van Rossum | e6eefc2 | 1992-08-14 12:06:52 +0000 | [diff] [blame] | 400 | float_coerce(pv, pw) |
| 401 | object **pv; |
| 402 | object **pw; |
| 403 | { |
| 404 | if (is_intobject(*pw)) { |
| 405 | long x = getintvalue(*pw); |
| 406 | *pw = newfloatobject((double)x); |
| 407 | INCREF(*pv); |
| 408 | return 0; |
| 409 | } |
| 410 | else if (is_longobject(*pw)) { |
| 411 | *pw = newfloatobject(dgetlongvalue(*pw)); |
| 412 | INCREF(*pv); |
| 413 | return 0; |
| 414 | } |
| 415 | return 1; /* Can't do it */ |
| 416 | } |
| 417 | |
Guido van Rossum | 1899c2e | 1992-09-12 11:09:23 +0000 | [diff] [blame] | 418 | static object * |
| 419 | float_int(v) |
| 420 | object *v; |
| 421 | { |
| 422 | double x = getfloatvalue(v); |
Guido van Rossum | 03093a2 | 1994-09-28 15:51:32 +0000 | [diff] [blame] | 423 | if (x < 0 ? (x = ceil(x)) < (double)LONG_MIN |
| 424 | : (x = floor(x)) > (double)LONG_MAX) { |
Guido van Rossum | 67ca701 | 1995-02-13 16:38:41 +0000 | [diff] [blame] | 425 | err_setstr(OverflowError, "float too large to convert"); |
Guido van Rossum | 03093a2 | 1994-09-28 15:51:32 +0000 | [diff] [blame] | 426 | return NULL; |
| 427 | } |
Guido van Rossum | 1899c2e | 1992-09-12 11:09:23 +0000 | [diff] [blame] | 428 | return newintobject((long)x); |
| 429 | } |
| 430 | |
| 431 | static object * |
| 432 | float_long(v) |
| 433 | object *v; |
| 434 | { |
| 435 | double x = getfloatvalue(v); |
| 436 | return dnewlongobject(x); |
| 437 | } |
| 438 | |
| 439 | static object * |
| 440 | float_float(v) |
| 441 | object *v; |
| 442 | { |
| 443 | INCREF(v); |
| 444 | return v; |
| 445 | } |
| 446 | |
| 447 | |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 448 | static number_methods float_as_number = { |
Guido van Rossum | b6775db | 1994-08-01 11:34:53 +0000 | [diff] [blame] | 449 | (binaryfunc)float_add, /*nb_add*/ |
| 450 | (binaryfunc)float_sub, /*nb_subtract*/ |
| 451 | (binaryfunc)float_mul, /*nb_multiply*/ |
| 452 | (binaryfunc)float_div, /*nb_divide*/ |
| 453 | (binaryfunc)float_rem, /*nb_remainder*/ |
| 454 | (binaryfunc)float_divmod, /*nb_divmod*/ |
Guido van Rossum | 0b7d02a | 1994-08-12 12:52:35 +0000 | [diff] [blame] | 455 | (ternaryfunc)float_pow, /*nb_power*/ |
Guido van Rossum | b6775db | 1994-08-01 11:34:53 +0000 | [diff] [blame] | 456 | (unaryfunc)float_neg, /*nb_negative*/ |
| 457 | (unaryfunc)float_pos, /*nb_positive*/ |
| 458 | (unaryfunc)float_abs, /*nb_absolute*/ |
| 459 | (inquiry)float_nonzero, /*nb_nonzero*/ |
Guido van Rossum | 27acb33 | 1991-10-24 14:55:28 +0000 | [diff] [blame] | 460 | 0, /*nb_invert*/ |
| 461 | 0, /*nb_lshift*/ |
| 462 | 0, /*nb_rshift*/ |
| 463 | 0, /*nb_and*/ |
| 464 | 0, /*nb_xor*/ |
| 465 | 0, /*nb_or*/ |
Guido van Rossum | b6775db | 1994-08-01 11:34:53 +0000 | [diff] [blame] | 466 | (coercion)float_coerce, /*nb_coerce*/ |
| 467 | (unaryfunc)float_int, /*nb_int*/ |
| 468 | (unaryfunc)float_long, /*nb_long*/ |
| 469 | (unaryfunc)float_float, /*nb_float*/ |
Guido van Rossum | 1899c2e | 1992-09-12 11:09:23 +0000 | [diff] [blame] | 470 | 0, /*nb_oct*/ |
| 471 | 0, /*nb_hex*/ |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 472 | }; |
| 473 | |
| 474 | typeobject Floattype = { |
| 475 | OB_HEAD_INIT(&Typetype) |
| 476 | 0, |
| 477 | "float", |
| 478 | sizeof(floatobject), |
| 479 | 0, |
Guido van Rossum | b6775db | 1994-08-01 11:34:53 +0000 | [diff] [blame] | 480 | (destructor)float_dealloc, /*tp_dealloc*/ |
| 481 | (printfunc)float_print, /*tp_print*/ |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 482 | 0, /*tp_getattr*/ |
| 483 | 0, /*tp_setattr*/ |
Guido van Rossum | b6775db | 1994-08-01 11:34:53 +0000 | [diff] [blame] | 484 | (cmpfunc)float_compare, /*tp_compare*/ |
| 485 | (reprfunc)float_repr, /*tp_repr*/ |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 486 | &float_as_number, /*tp_as_number*/ |
| 487 | 0, /*tp_as_sequence*/ |
| 488 | 0, /*tp_as_mapping*/ |
Guido van Rossum | b6775db | 1994-08-01 11:34:53 +0000 | [diff] [blame] | 489 | (hashfunc)float_hash, /*tp_hash*/ |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 490 | }; |