Guido van Rossum | f70e43a | 1991-02-19 12:39:46 +0000 | [diff] [blame] | 1 | /*********************************************************** |
Guido van Rossum | b6775db | 1994-08-01 11:34:53 +0000 | [diff] [blame] | 2 | Copyright 1991, 1992, 1993, 1994 by Stichting Mathematisch Centrum, |
Guido van Rossum | e537240 | 1993-03-16 12:15:04 +0000 | [diff] [blame] | 3 | Amsterdam, 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> |
| 35 | #include <math.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 | b6775db | 1994-08-01 11:34:53 +0000 | [diff] [blame] | 50 | #ifndef macintosh |
Guido van Rossum | 6923e13 | 1990-11-02 17:50:43 +0000 | [diff] [blame] | 51 | extern double fmod PROTO((double, double)); |
| 52 | extern double pow PROTO((double, double)); |
| 53 | #endif |
| 54 | |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 55 | object * |
| 56 | newfloatobject(fval) |
| 57 | double fval; |
| 58 | { |
| 59 | /* For efficiency, this code is copied from newobject() */ |
| 60 | register floatobject *op = (floatobject *) malloc(sizeof(floatobject)); |
Guido van Rossum | 2a9096b | 1990-10-21 22:15:08 +0000 | [diff] [blame] | 61 | if (op == NULL) |
| 62 | return err_nomem(); |
Guido van Rossum | 2a9096b | 1990-10-21 22:15:08 +0000 | [diff] [blame] | 63 | op->ob_type = &Floattype; |
| 64 | op->ob_fval = fval; |
Sjoerd Mullender | a9c3c22 | 1993-10-11 12:54:31 +0000 | [diff] [blame] | 65 | NEWREF(op); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 66 | return (object *) op; |
| 67 | } |
| 68 | |
Guido van Rossum | 234f942 | 1993-06-17 12:35:49 +0000 | [diff] [blame] | 69 | static void |
Guido van Rossum | 3132a5a | 1992-03-27 17:28:44 +0000 | [diff] [blame] | 70 | float_dealloc(op) |
| 71 | object *op; |
| 72 | { |
| 73 | DEL(op); |
| 74 | } |
| 75 | |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 76 | double |
| 77 | getfloatvalue(op) |
| 78 | object *op; |
| 79 | { |
Guido van Rossum | b6775db | 1994-08-01 11:34:53 +0000 | [diff] [blame] | 80 | number_methods *nb; |
| 81 | floatobject *fo; |
| 82 | double val; |
| 83 | |
| 84 | if (op && is_floatobject(op)) |
| 85 | return GETFLOATVALUE((floatobject*) op); |
| 86 | |
| 87 | if (op == NULL || (nb = op->ob_type->tp_as_number) == NULL || |
| 88 | nb->nb_float == NULL) { |
Guido van Rossum | 2a9096b | 1990-10-21 22:15:08 +0000 | [diff] [blame] | 89 | err_badarg(); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 90 | return -1; |
| 91 | } |
Guido van Rossum | b6775db | 1994-08-01 11:34:53 +0000 | [diff] [blame] | 92 | |
| 93 | fo = (floatobject*) (*nb->nb_float) (op); |
| 94 | if (fo == NULL) |
| 95 | return -1; |
| 96 | if (!is_floatobject(fo)) { |
| 97 | err_setstr(TypeError, "nb_float should return float object"); |
| 98 | return -1; |
| 99 | } |
| 100 | |
| 101 | val = GETFLOATVALUE(fo); |
| 102 | DECREF(fo); |
| 103 | |
| 104 | return val; |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 105 | } |
| 106 | |
| 107 | /* Methods */ |
| 108 | |
Guido van Rossum | 27dec7e | 1991-06-04 19:42:53 +0000 | [diff] [blame] | 109 | void |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 110 | float_buf_repr(buf, v) |
| 111 | char *buf; |
| 112 | floatobject *v; |
| 113 | { |
| 114 | register char *cp; |
| 115 | /* Subroutine for float_repr and float_print. |
| 116 | We want float numbers to be recognizable as such, |
| 117 | i.e., they should contain a decimal point or an exponent. |
| 118 | However, %g may print the number as an integer; |
| 119 | in such cases, we append ".0" to the string. */ |
| 120 | sprintf(buf, "%.12g", v->ob_fval); |
| 121 | cp = buf; |
| 122 | if (*cp == '-') |
| 123 | cp++; |
| 124 | for (; *cp != '\0'; cp++) { |
| 125 | /* Any non-digit means it's not an integer; |
| 126 | this takes care of NAN and INF as well. */ |
| 127 | if (!isdigit(*cp)) |
| 128 | break; |
| 129 | } |
| 130 | if (*cp == '\0') { |
| 131 | *cp++ = '.'; |
| 132 | *cp++ = '0'; |
| 133 | *cp++ = '\0'; |
| 134 | } |
| 135 | } |
| 136 | |
Guido van Rossum | 3132a5a | 1992-03-27 17:28:44 +0000 | [diff] [blame] | 137 | /* ARGSUSED */ |
Guido van Rossum | 9093361 | 1991-06-07 16:10:43 +0000 | [diff] [blame] | 138 | static int |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 139 | float_print(v, fp, flags) |
| 140 | floatobject *v; |
| 141 | FILE *fp; |
Guido van Rossum | 3132a5a | 1992-03-27 17:28:44 +0000 | [diff] [blame] | 142 | int flags; /* Not used but required by interface */ |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 143 | { |
| 144 | char buf[100]; |
| 145 | float_buf_repr(buf, v); |
| 146 | fputs(buf, fp); |
Guido van Rossum | 9093361 | 1991-06-07 16:10:43 +0000 | [diff] [blame] | 147 | return 0; |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 148 | } |
| 149 | |
| 150 | static object * |
| 151 | float_repr(v) |
| 152 | floatobject *v; |
| 153 | { |
| 154 | char buf[100]; |
| 155 | float_buf_repr(buf, v); |
| 156 | return newstringobject(buf); |
| 157 | } |
| 158 | |
| 159 | static int |
| 160 | float_compare(v, w) |
| 161 | floatobject *v, *w; |
| 162 | { |
| 163 | double i = v->ob_fval; |
| 164 | double j = w->ob_fval; |
| 165 | return (i < j) ? -1 : (i > j) ? 1 : 0; |
| 166 | } |
| 167 | |
Guido van Rossum | 9bfef44 | 1993-03-29 10:43:31 +0000 | [diff] [blame] | 168 | static long |
| 169 | float_hash(v) |
| 170 | floatobject *v; |
| 171 | { |
| 172 | double intpart, fractpart; |
| 173 | int expo; |
| 174 | long x; |
| 175 | /* This is designed so that Python numbers with the same |
| 176 | value hash to the same value, otherwise comparisons |
| 177 | of mapping keys will turn out weird */ |
Guido van Rossum | b6775db | 1994-08-01 11:34:53 +0000 | [diff] [blame] | 178 | |
| 179 | #ifdef MPW /* MPW C modf expects pointer to extended as second argument */ |
| 180 | { |
| 181 | extended e; |
| 182 | fractpart = modf(v->ob_fval, &e); |
| 183 | intpart = e; |
| 184 | } |
| 185 | #else |
Guido van Rossum | 9bfef44 | 1993-03-29 10:43:31 +0000 | [diff] [blame] | 186 | fractpart = modf(v->ob_fval, &intpart); |
Guido van Rossum | b6775db | 1994-08-01 11:34:53 +0000 | [diff] [blame] | 187 | #endif |
| 188 | |
Guido van Rossum | 9bfef44 | 1993-03-29 10:43:31 +0000 | [diff] [blame] | 189 | if (fractpart == 0.0) { |
| 190 | if (intpart > 0x7fffffffL || -intpart > 0x7fffffffL) { |
| 191 | /* Convert to long int and use its hash... */ |
| 192 | object *w = dnewlongobject(v->ob_fval); |
| 193 | if (w == NULL) |
| 194 | return -1; |
| 195 | x = hashobject(w); |
| 196 | DECREF(w); |
| 197 | return x; |
| 198 | } |
| 199 | x = (long)intpart; |
| 200 | } |
| 201 | else { |
| 202 | fractpart = frexp(fractpart, &expo); |
Guido van Rossum | 9575a44 | 1993-04-07 14:06:14 +0000 | [diff] [blame] | 203 | fractpart = fractpart*4294967296.0; /* 2**32 */ |
Guido van Rossum | 9bfef44 | 1993-03-29 10:43:31 +0000 | [diff] [blame] | 204 | x = (long) (intpart + fractpart) ^ expo; /* Rather arbitrary */ |
| 205 | } |
| 206 | if (x == -1) |
| 207 | x = -2; |
| 208 | return x; |
| 209 | } |
| 210 | |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 211 | static object * |
| 212 | float_add(v, w) |
| 213 | floatobject *v; |
Guido van Rossum | 56cd67a | 1992-01-26 18:16:35 +0000 | [diff] [blame] | 214 | floatobject *w; |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 215 | { |
Guido van Rossum | 56cd67a | 1992-01-26 18:16:35 +0000 | [diff] [blame] | 216 | return newfloatobject(v->ob_fval + w->ob_fval); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 217 | } |
| 218 | |
| 219 | static object * |
| 220 | float_sub(v, w) |
| 221 | floatobject *v; |
Guido van Rossum | 56cd67a | 1992-01-26 18:16:35 +0000 | [diff] [blame] | 222 | floatobject *w; |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 223 | { |
Guido van Rossum | 56cd67a | 1992-01-26 18:16:35 +0000 | [diff] [blame] | 224 | return newfloatobject(v->ob_fval - w->ob_fval); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 225 | } |
| 226 | |
| 227 | static object * |
| 228 | float_mul(v, w) |
| 229 | floatobject *v; |
Guido van Rossum | 56cd67a | 1992-01-26 18:16:35 +0000 | [diff] [blame] | 230 | floatobject *w; |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 231 | { |
Guido van Rossum | 56cd67a | 1992-01-26 18:16:35 +0000 | [diff] [blame] | 232 | return newfloatobject(v->ob_fval * w->ob_fval); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 233 | } |
| 234 | |
| 235 | static object * |
| 236 | float_div(v, w) |
| 237 | floatobject *v; |
Guido van Rossum | 56cd67a | 1992-01-26 18:16:35 +0000 | [diff] [blame] | 238 | floatobject *w; |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 239 | { |
Guido van Rossum | 56cd67a | 1992-01-26 18:16:35 +0000 | [diff] [blame] | 240 | if (w->ob_fval == 0) { |
Guido van Rossum | 9a9fadd | 1991-12-10 13:56:55 +0000 | [diff] [blame] | 241 | err_setstr(ZeroDivisionError, "float division"); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 242 | return NULL; |
| 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_rem(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 | double vx, wx; |
Guido van Rossum | 3132a5a | 1992-03-27 17:28:44 +0000 | [diff] [blame] | 253 | double /* div, */ mod; |
Guido van Rossum | 56cd67a | 1992-01-26 18:16:35 +0000 | [diff] [blame] | 254 | wx = w->ob_fval; |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 255 | if (wx == 0.0) { |
Guido van Rossum | 56cd67a | 1992-01-26 18:16:35 +0000 | [diff] [blame] | 256 | err_setstr(ZeroDivisionError, "float modulo"); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 257 | return NULL; |
| 258 | } |
Guido van Rossum | 56cd67a | 1992-01-26 18:16:35 +0000 | [diff] [blame] | 259 | vx = v->ob_fval; |
| 260 | mod = fmod(vx, wx); |
Guido van Rossum | 3132a5a | 1992-03-27 17:28:44 +0000 | [diff] [blame] | 261 | /* div = (vx - mod) / wx; */ |
Guido van Rossum | 56cd67a | 1992-01-26 18:16:35 +0000 | [diff] [blame] | 262 | if (wx*mod < 0) { |
| 263 | mod += wx; |
Guido van Rossum | 3132a5a | 1992-03-27 17:28:44 +0000 | [diff] [blame] | 264 | /* div -= 1.0; */ |
Guido van Rossum | 56cd67a | 1992-01-26 18:16:35 +0000 | [diff] [blame] | 265 | } |
| 266 | return newfloatobject(mod); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 267 | } |
| 268 | |
| 269 | static object * |
Guido van Rossum | eba1b5e | 1991-05-05 20:07:00 +0000 | [diff] [blame] | 270 | float_divmod(v, w) |
| 271 | floatobject *v; |
Guido van Rossum | 56cd67a | 1992-01-26 18:16:35 +0000 | [diff] [blame] | 272 | floatobject *w; |
Guido van Rossum | eba1b5e | 1991-05-05 20:07:00 +0000 | [diff] [blame] | 273 | { |
Guido van Rossum | 15ecff4 | 1991-10-20 20:16:45 +0000 | [diff] [blame] | 274 | double vx, wx; |
| 275 | double div, mod; |
| 276 | object *t; |
Guido van Rossum | 56cd67a | 1992-01-26 18:16:35 +0000 | [diff] [blame] | 277 | wx = w->ob_fval; |
Guido van Rossum | 15ecff4 | 1991-10-20 20:16:45 +0000 | [diff] [blame] | 278 | if (wx == 0.0) { |
Guido van Rossum | 9a9fadd | 1991-12-10 13:56:55 +0000 | [diff] [blame] | 279 | err_setstr(ZeroDivisionError, "float divmod()"); |
Guido van Rossum | 15ecff4 | 1991-10-20 20:16:45 +0000 | [diff] [blame] | 280 | return NULL; |
| 281 | } |
| 282 | vx = v->ob_fval; |
| 283 | mod = fmod(vx, wx); |
| 284 | div = (vx - mod) / wx; |
| 285 | if (wx*mod < 0) { |
| 286 | mod += wx; |
| 287 | div -= 1.0; |
| 288 | } |
Guido van Rossum | e537240 | 1993-03-16 12:15:04 +0000 | [diff] [blame] | 289 | return mkvalue("(dd)", div, mod); |
Guido van Rossum | eba1b5e | 1991-05-05 20:07:00 +0000 | [diff] [blame] | 290 | } |
| 291 | |
| 292 | static object * |
Guido van Rossum | 0b7d02a | 1994-08-12 12:52:35 +0000 | [diff] [blame^] | 293 | float_pow(v, w, z) |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 294 | floatobject *v; |
Guido van Rossum | 56cd67a | 1992-01-26 18:16:35 +0000 | [diff] [blame] | 295 | floatobject *w; |
Guido van Rossum | 0b7d02a | 1994-08-12 12:52:35 +0000 | [diff] [blame^] | 296 | floatobject *z; |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 297 | { |
| 298 | double iv, iw, ix; |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 299 | iv = v->ob_fval; |
Guido van Rossum | 56cd67a | 1992-01-26 18:16:35 +0000 | [diff] [blame] | 300 | iw = w->ob_fval; |
Guido van Rossum | 0b7d02a | 1994-08-12 12:52:35 +0000 | [diff] [blame^] | 301 | /* XXX Doesn't handle overflows if z!=None yet; it may never do so :( |
| 302 | * The z parameter is really only going to be useful for integers and |
| 303 | * long integers. Maybe something clever with logarithms could be done. |
| 304 | * [AMK] |
| 305 | */ |
Guido van Rossum | 70d9346 | 1991-05-28 21:57:39 +0000 | [diff] [blame] | 306 | /* Sort out special cases here instead of relying on pow() */ |
Guido van Rossum | 0b7d02a | 1994-08-12 12:52:35 +0000 | [diff] [blame^] | 307 | if (iw == 0.0) { /* x**0 is 1, even 0**0 */ |
| 308 | if ((object *)z!=None) { |
| 309 | ix=fmod(1.0, z->ob_fval); |
| 310 | if (ix!=0 && z->ob_fval<0) ix+=z->ob_fval; |
| 311 | } |
| 312 | else ix=1.0; |
| 313 | return newfloatobject(ix); |
| 314 | } |
Guido van Rossum | 70d9346 | 1991-05-28 21:57:39 +0000 | [diff] [blame] | 315 | if (iv == 0.0) { |
| 316 | if (iw < 0.0) { |
Guido van Rossum | 0b7d02a | 1994-08-12 12:52:35 +0000 | [diff] [blame^] | 317 | err_setstr(ValueError, "0.0 to a negative power"); |
Guido van Rossum | 70d9346 | 1991-05-28 21:57:39 +0000 | [diff] [blame] | 318 | return NULL; |
| 319 | } |
| 320 | return newfloatobject(0.0); |
| 321 | } |
| 322 | if (iv < 0.0) { |
Guido van Rossum | 9a9fadd | 1991-12-10 13:56:55 +0000 | [diff] [blame] | 323 | err_setstr(ValueError, "negative float to float power"); |
Guido van Rossum | 70d9346 | 1991-05-28 21:57:39 +0000 | [diff] [blame] | 324 | return NULL; |
| 325 | } |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 326 | errno = 0; |
| 327 | ix = pow(iv, iw); |
Guido van Rossum | 7fa52f8 | 1991-12-16 15:43:14 +0000 | [diff] [blame] | 328 | CHECK(ix); |
Guido van Rossum | 2a9096b | 1990-10-21 22:15:08 +0000 | [diff] [blame] | 329 | if (errno != 0) { |
| 330 | /* XXX could it be another type of error? */ |
| 331 | err_errno(OverflowError); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 332 | return NULL; |
Guido van Rossum | 2a9096b | 1990-10-21 22:15:08 +0000 | [diff] [blame] | 333 | } |
Guido van Rossum | 0b7d02a | 1994-08-12 12:52:35 +0000 | [diff] [blame^] | 334 | if ((object *)z!=None) { |
| 335 | ix=fmod(ix, z->ob_fval); /* XXX To Be Rewritten */ |
| 336 | if ( ix!=0 && |
| 337 | ((iv<0 && z->ob_fval>0) || (iv>0 && z->ob_fval<0) )) { |
| 338 | ix+=z->ob_fval; |
| 339 | } |
| 340 | } |
Guido van Rossum | 2a9096b | 1990-10-21 22:15:08 +0000 | [diff] [blame] | 341 | return newfloatobject(ix); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 342 | } |
| 343 | |
| 344 | static object * |
| 345 | float_neg(v) |
| 346 | floatobject *v; |
| 347 | { |
| 348 | return newfloatobject(-v->ob_fval); |
| 349 | } |
| 350 | |
| 351 | static object * |
| 352 | float_pos(v) |
| 353 | floatobject *v; |
| 354 | { |
Guido van Rossum | eba1b5e | 1991-05-05 20:07:00 +0000 | [diff] [blame] | 355 | INCREF(v); |
| 356 | return (object *)v; |
| 357 | } |
| 358 | |
| 359 | static object * |
| 360 | float_abs(v) |
| 361 | floatobject *v; |
| 362 | { |
| 363 | if (v->ob_fval < 0) |
| 364 | return float_neg(v); |
| 365 | else |
| 366 | return float_pos(v); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 367 | } |
| 368 | |
Guido van Rossum | 50b4ef6 | 1991-05-14 11:57:01 +0000 | [diff] [blame] | 369 | static int |
| 370 | float_nonzero(v) |
| 371 | floatobject *v; |
| 372 | { |
| 373 | return v->ob_fval != 0.0; |
| 374 | } |
| 375 | |
Guido van Rossum | 234f942 | 1993-06-17 12:35:49 +0000 | [diff] [blame] | 376 | static int |
Guido van Rossum | e6eefc2 | 1992-08-14 12:06:52 +0000 | [diff] [blame] | 377 | float_coerce(pv, pw) |
| 378 | object **pv; |
| 379 | object **pw; |
| 380 | { |
| 381 | if (is_intobject(*pw)) { |
| 382 | long x = getintvalue(*pw); |
| 383 | *pw = newfloatobject((double)x); |
| 384 | INCREF(*pv); |
| 385 | return 0; |
| 386 | } |
| 387 | else if (is_longobject(*pw)) { |
| 388 | *pw = newfloatobject(dgetlongvalue(*pw)); |
| 389 | INCREF(*pv); |
| 390 | return 0; |
| 391 | } |
| 392 | return 1; /* Can't do it */ |
| 393 | } |
| 394 | |
Guido van Rossum | 1899c2e | 1992-09-12 11:09:23 +0000 | [diff] [blame] | 395 | static object * |
| 396 | float_int(v) |
| 397 | object *v; |
| 398 | { |
| 399 | double x = getfloatvalue(v); |
| 400 | /* XXX should check for overflow */ |
| 401 | /* XXX should define how we round */ |
| 402 | return newintobject((long)x); |
| 403 | } |
| 404 | |
| 405 | static object * |
| 406 | float_long(v) |
| 407 | object *v; |
| 408 | { |
| 409 | double x = getfloatvalue(v); |
| 410 | return dnewlongobject(x); |
| 411 | } |
| 412 | |
| 413 | static object * |
| 414 | float_float(v) |
| 415 | object *v; |
| 416 | { |
| 417 | INCREF(v); |
| 418 | return v; |
| 419 | } |
| 420 | |
| 421 | |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 422 | static number_methods float_as_number = { |
Guido van Rossum | b6775db | 1994-08-01 11:34:53 +0000 | [diff] [blame] | 423 | (binaryfunc)float_add, /*nb_add*/ |
| 424 | (binaryfunc)float_sub, /*nb_subtract*/ |
| 425 | (binaryfunc)float_mul, /*nb_multiply*/ |
| 426 | (binaryfunc)float_div, /*nb_divide*/ |
| 427 | (binaryfunc)float_rem, /*nb_remainder*/ |
| 428 | (binaryfunc)float_divmod, /*nb_divmod*/ |
Guido van Rossum | 0b7d02a | 1994-08-12 12:52:35 +0000 | [diff] [blame^] | 429 | (ternaryfunc)float_pow, /*nb_power*/ |
Guido van Rossum | b6775db | 1994-08-01 11:34:53 +0000 | [diff] [blame] | 430 | (unaryfunc)float_neg, /*nb_negative*/ |
| 431 | (unaryfunc)float_pos, /*nb_positive*/ |
| 432 | (unaryfunc)float_abs, /*nb_absolute*/ |
| 433 | (inquiry)float_nonzero, /*nb_nonzero*/ |
Guido van Rossum | 27acb33 | 1991-10-24 14:55:28 +0000 | [diff] [blame] | 434 | 0, /*nb_invert*/ |
| 435 | 0, /*nb_lshift*/ |
| 436 | 0, /*nb_rshift*/ |
| 437 | 0, /*nb_and*/ |
| 438 | 0, /*nb_xor*/ |
| 439 | 0, /*nb_or*/ |
Guido van Rossum | b6775db | 1994-08-01 11:34:53 +0000 | [diff] [blame] | 440 | (coercion)float_coerce, /*nb_coerce*/ |
| 441 | (unaryfunc)float_int, /*nb_int*/ |
| 442 | (unaryfunc)float_long, /*nb_long*/ |
| 443 | (unaryfunc)float_float, /*nb_float*/ |
Guido van Rossum | 1899c2e | 1992-09-12 11:09:23 +0000 | [diff] [blame] | 444 | 0, /*nb_oct*/ |
| 445 | 0, /*nb_hex*/ |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 446 | }; |
| 447 | |
| 448 | typeobject Floattype = { |
| 449 | OB_HEAD_INIT(&Typetype) |
| 450 | 0, |
| 451 | "float", |
| 452 | sizeof(floatobject), |
| 453 | 0, |
Guido van Rossum | b6775db | 1994-08-01 11:34:53 +0000 | [diff] [blame] | 454 | (destructor)float_dealloc, /*tp_dealloc*/ |
| 455 | (printfunc)float_print, /*tp_print*/ |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 456 | 0, /*tp_getattr*/ |
| 457 | 0, /*tp_setattr*/ |
Guido van Rossum | b6775db | 1994-08-01 11:34:53 +0000 | [diff] [blame] | 458 | (cmpfunc)float_compare, /*tp_compare*/ |
| 459 | (reprfunc)float_repr, /*tp_repr*/ |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 460 | &float_as_number, /*tp_as_number*/ |
| 461 | 0, /*tp_as_sequence*/ |
| 462 | 0, /*tp_as_mapping*/ |
Guido van Rossum | b6775db | 1994-08-01 11:34:53 +0000 | [diff] [blame] | 463 | (hashfunc)float_hash, /*tp_hash*/ |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 464 | }; |