Mercurial > hg > xemacs-beta
annotate src/number.c @ 5125:b5df3737028a ben-lisp-object
merge
| author | Ben Wing <ben@xemacs.org> |
|---|---|
| date | Wed, 24 Feb 2010 01:58:04 -0600 |
| parents | 623d57b7fbe8 16112448d484 |
| children | 0dcd22290039 |
| rev | line source |
|---|---|
| 1983 | 1 /* Numeric types for XEmacs. |
| 2 Copyright (C) 2004 Jerry James. | |
| 5125 | 3 Copyright (C) 2010 Ben Wing. |
| 1983 | 4 |
| 5 This file is part of XEmacs. | |
| 6 | |
| 7 XEmacs is free software; you can redistribute it and/or modify it | |
| 8 under the terms of the GNU General Public License as published by the | |
| 9 Free Software Foundation; either version 2, or (at your option) any | |
| 10 later version. | |
| 11 | |
| 12 XEmacs is distributed in the hope that it will be useful, but WITHOUT | |
| 13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 15 for more details. | |
| 16 | |
| 17 You should have received a copy of the GNU General Public License | |
| 18 along with XEmacs; see the file COPYING. If not, write to | |
|
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19 the Free Software Foundation, Inc., 51 Franklin St - Fifth Floor, |
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20 Boston, MA 02111-1301, USA. */ |
| 1983 | 21 |
| 22 /* Synched up with: Not in FSF. */ | |
| 23 | |
| 24 #include <config.h> | |
| 25 #include <limits.h> | |
| 26 #include "lisp.h" | |
| 27 | |
| 2595 | 28 #ifdef HAVE_BIGFLOAT |
| 29 #define USED_IF_BIGFLOAT(decl) decl | |
| 30 #else | |
| 31 #define USED_IF_BIGFLOAT(decl) UNUSED (decl) | |
| 32 #endif | |
| 33 | |
| 2001 | 34 Lisp_Object Qrationalp, Qfloatingp, Qrealp; |
| 1983 | 35 Lisp_Object Vdefault_float_precision; |
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36 |
| 1983 | 37 static Lisp_Object Qunsupported_type; |
| 38 static Lisp_Object Vbigfloat_max_prec; | |
| 39 static int number_initialized; | |
| 40 | |
| 41 #ifdef HAVE_BIGNUM | |
| 42 bignum scratch_bignum, scratch_bignum2; | |
| 43 #endif | |
| 44 #ifdef HAVE_RATIO | |
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45 ratio scratch_ratio, scratch_ratio2; |
| 1983 | 46 #endif |
| 47 #ifdef HAVE_BIGFLOAT | |
| 48 bigfloat scratch_bigfloat, scratch_bigfloat2; | |
| 49 #endif | |
| 50 | |
| 51 /********************************* Bignums **********************************/ | |
| 52 #ifdef HAVE_BIGNUM | |
| 53 static void | |
| 2286 | 54 bignum_print (Lisp_Object obj, Lisp_Object printcharfun, |
| 55 int UNUSED (escapeflag)) | |
| 1983 | 56 { |
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57 Ascbyte *bstr = bignum_to_string (XBIGNUM_DATA (obj), 10); |
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58 write_ascstring (printcharfun, bstr); |
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59 xfree (bstr); |
| 1983 | 60 } |
| 61 | |
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62 #ifdef NEW_GC |
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63 static void |
| 5125 | 64 bignum_finalize (void *header) |
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65 { |
| 5125 | 66 struct Lisp_Bignum *num = (struct Lisp_Bignum *) header; |
| 67 /* #### WARNING: It would be better to put some sort of check to make | |
| 68 sure this doesn't happen more than once, just in case --- | |
| 69 e.g. checking if it's zero before finalizing and then setting it to | |
| 70 zero after finalizing. */ | |
| 71 bignum_fini (num->data); | |
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72 } |
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73 #define BIGNUM_FINALIZE bignum_finalize |
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74 #else |
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75 #define BIGNUM_FINALIZE 0 |
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76 #endif |
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77 |
| 1983 | 78 static int |
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79 bignum_equal (Lisp_Object obj1, Lisp_Object obj2, int UNUSED (depth), |
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80 int UNUSED (foldcase)) |
| 1983 | 81 { |
| 82 return bignum_eql (XBIGNUM_DATA (obj1), XBIGNUM_DATA (obj2)); | |
| 83 } | |
| 84 | |
| 85 static Hashcode | |
| 2286 | 86 bignum_hash (Lisp_Object obj, int UNUSED (depth)) |
| 1983 | 87 { |
| 88 return bignum_hashcode (XBIGNUM_DATA (obj)); | |
| 89 } | |
| 90 | |
| 2551 | 91 static void |
| 92 bignum_convert (const void *object, void **data, Bytecount *size) | |
| 93 { | |
| 94 CIbyte *bstr = bignum_to_string (*(bignum *)object, 10); | |
| 95 *data = bstr; | |
| 96 *size = strlen(bstr)+1; | |
| 97 } | |
| 98 | |
| 99 static void | |
| 100 bignum_convfree (const void * UNUSED (object), void *data, | |
| 101 Bytecount UNUSED (size)) | |
| 102 { | |
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103 xfree (data); |
| 2551 | 104 } |
| 105 | |
| 106 static void * | |
| 107 bignum_deconvert (void *object, void *data, Bytecount UNUSED (size)) | |
| 108 { | |
| 109 bignum *b = (bignum *) object; | |
| 110 bignum_init(*b); | |
| 111 bignum_set_string(*b, (const char *) data, 10); | |
| 112 return object; | |
| 113 } | |
| 114 | |
| 115 static const struct opaque_convert_functions bignum_opc = { | |
| 116 bignum_convert, | |
| 117 bignum_convfree, | |
| 118 bignum_deconvert | |
| 119 }; | |
| 120 | |
| 1983 | 121 static const struct memory_description bignum_description[] = { |
| 2551 | 122 { XD_OPAQUE_DATA_CONVERTIBLE, offsetof (Lisp_Bignum, data), |
| 123 0, { &bignum_opc }, XD_FLAG_NO_KKCC }, | |
| 1983 | 124 { XD_END } |
| 125 }; | |
| 126 | |
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127 DEFINE_DUMPABLE_FROB_BLOCK_LISP_OBJECT ("bignum", bignum, 0, bignum_print, |
| 5125 | 128 BIGNUM_FINALIZE, bignum_equal, |
| 129 bignum_hash, bignum_description, | |
| 130 Lisp_Bignum); | |
| 1983 | 131 |
| 2092 | 132 #endif /* HAVE_BIGNUM */ |
| 1983 | 133 |
| 134 Lisp_Object Qbignump; | |
| 135 | |
| 136 DEFUN ("bignump", Fbignump, 1, 1, 0, /* | |
| 137 Return t if OBJECT is a bignum, nil otherwise. | |
| 138 */ | |
| 139 (object)) | |
| 140 { | |
| 141 return BIGNUMP (object) ? Qt : Qnil; | |
| 142 } | |
| 143 | |
| 144 | |
| 145 /********************************** Ratios **********************************/ | |
| 146 #ifdef HAVE_RATIO | |
| 147 static void | |
| 2286 | 148 ratio_print (Lisp_Object obj, Lisp_Object printcharfun, |
| 149 int UNUSED (escapeflag)) | |
| 1983 | 150 { |
| 151 CIbyte *rstr = ratio_to_string (XRATIO_DATA (obj), 10); | |
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152 write_ascstring (printcharfun, rstr); |
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153 xfree (rstr); |
| 1983 | 154 } |
| 155 | |
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156 #ifdef NEW_GC |
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157 static void |
| 5125 | 158 ratio_finalize (void *header) |
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159 { |
| 5125 | 160 struct Lisp_Ratio *num = (struct Lisp_Ratio *) header; |
| 161 /* #### WARNING: It would be better to put some sort of check to make | |
| 162 sure this doesn't happen more than once, just in case --- | |
| 163 e.g. checking if it's zero before finalizing and then setting it to | |
| 164 zero after finalizing. */ | |
| 165 ratio_fini (num->data); | |
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166 } |
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167 #define RATIO_FINALIZE ratio_finalize |
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168 #else |
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169 #define RATIO_FINALIZE 0 |
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170 #endif |
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171 |
| 1983 | 172 static int |
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173 ratio_equal (Lisp_Object obj1, Lisp_Object obj2, int UNUSED (depth), |
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174 int UNUSED (foldcase)) |
| 1983 | 175 { |
| 176 return ratio_eql (XRATIO_DATA (obj1), XRATIO_DATA (obj2)); | |
| 177 } | |
| 178 | |
| 179 static Hashcode | |
| 2286 | 180 ratio_hash (Lisp_Object obj, int UNUSED (depth)) |
| 1983 | 181 { |
| 182 return ratio_hashcode (XRATIO_DATA (obj)); | |
| 183 } | |
| 184 | |
| 185 static const struct memory_description ratio_description[] = { | |
| 186 { XD_OPAQUE_PTR, offsetof (Lisp_Ratio, data) }, | |
| 187 { XD_END } | |
| 188 }; | |
| 189 | |
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190 DEFINE_NODUMP_FROB_BLOCK_LISP_OBJECT ("ratio", ratio, 0, ratio_print, |
| 5125 | 191 RATIO_FINALIZE, ratio_equal, ratio_hash, |
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192 ratio_description, Lisp_Ratio); |
| 1983 | 193 |
| 2092 | 194 #endif /* HAVE_RATIO */ |
| 1983 | 195 |
| 196 Lisp_Object Qratiop; | |
| 197 | |
| 198 DEFUN ("ratiop", Fratiop, 1, 1, 0, /* | |
| 199 Return t if OBJECT is a ratio, nil otherwise. | |
| 200 */ | |
| 201 (object)) | |
| 202 { | |
| 203 return RATIOP (object) ? Qt : Qnil; | |
| 204 } | |
| 205 | |
| 206 | |
| 207 /******************************** Rationals *********************************/ | |
| 208 DEFUN ("rationalp", Frationalp, 1, 1, 0, /* | |
| 209 Return t if OBJECT is a rational, nil otherwise. | |
| 210 */ | |
| 211 (object)) | |
| 212 { | |
| 213 return RATIONALP (object) ? Qt : Qnil; | |
| 214 } | |
| 215 | |
| 216 DEFUN ("numerator", Fnumerator, 1, 1, 0, /* | |
| 217 Return the numerator of the canonical form of RATIONAL. | |
| 218 If RATIONAL is an integer, RATIONAL is returned. | |
| 219 */ | |
| 220 (rational)) | |
| 221 { | |
| 222 CONCHECK_RATIONAL (rational); | |
| 223 #ifdef HAVE_RATIO | |
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224 if (RATIOP (rational)) |
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225 { |
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226 return |
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227 Fcanonicalize_number (make_bignum_bg (XRATIO_NUMERATOR (rational))); |
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228 } |
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229 #endif |
| 1983 | 230 return rational; |
| 231 } | |
| 232 | |
| 233 DEFUN ("denominator", Fdenominator, 1, 1, 0, /* | |
| 234 Return the denominator of the canonical form of RATIONAL. | |
| 235 If RATIONAL is an integer, 1 is returned. | |
| 236 */ | |
| 237 (rational)) | |
| 238 { | |
| 239 CONCHECK_RATIONAL (rational); | |
| 240 #ifdef HAVE_RATIO | |
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241 if (RATIOP (rational)) |
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242 { |
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243 return Fcanonicalize_number (make_bignum_bg |
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244 (XRATIO_DENOMINATOR (rational))); |
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245 } |
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246 #endif |
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247 return make_int (1); |
| 1983 | 248 } |
| 249 | |
| 250 | |
| 251 /******************************** Bigfloats *********************************/ | |
| 252 #ifdef HAVE_BIGFLOAT | |
| 253 static void | |
| 2286 | 254 bigfloat_print (Lisp_Object obj, Lisp_Object printcharfun, |
| 255 int UNUSED (escapeflag)) | |
| 1983 | 256 { |
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257 Ascbyte *fstr = bigfloat_to_string (XBIGFLOAT_DATA (obj), 10); |
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258 write_ascstring (printcharfun, fstr); |
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259 xfree (fstr); |
| 1983 | 260 } |
| 261 | |
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262 #ifdef NEW_GC |
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263 static void |
| 5125 | 264 bigfloat_finalize (void *header) |
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265 { |
| 5125 | 266 struct Lisp_Bigfloat *num = (struct Lisp_Bigfloat *) header; |
| 267 /* #### WARNING: It would be better to put some sort of check to make | |
| 268 sure this doesn't happen more than once, just in case --- | |
| 269 e.g. checking if it's zero before finalizing and then setting it to | |
| 270 zero after finalizing. */ | |
| 271 bigfloat_fini (num->bf); | |
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272 } |
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273 #define BIGFLOAT_FINALIZE bigfloat_finalize |
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274 #else |
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275 #define BIGFLOAT_FINALIZE 0 |
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276 #endif |
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277 |
| 1983 | 278 static int |
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279 bigfloat_equal (Lisp_Object obj1, Lisp_Object obj2, int UNUSED (depth), |
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280 int UNUSED (foldcase)) |
| 1983 | 281 { |
| 282 return bigfloat_eql (XBIGFLOAT_DATA (obj1), XBIGFLOAT_DATA (obj2)); | |
| 283 } | |
| 284 | |
| 285 static Hashcode | |
| 2286 | 286 bigfloat_hash (Lisp_Object obj, int UNUSED (depth)) |
| 1983 | 287 { |
| 288 return bigfloat_hashcode (XBIGFLOAT_DATA (obj)); | |
| 289 } | |
| 290 | |
| 291 static const struct memory_description bigfloat_description[] = { | |
| 292 { XD_OPAQUE_PTR, offsetof (Lisp_Bigfloat, bf) }, | |
| 293 { XD_END } | |
| 294 }; | |
| 295 | |
|
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296 DEFINE_DUMPABLE_FROB_BLOCK_LISP_OBJECT ("bigfloat", bigfloat, 0, |
| 5125 | 297 bigfloat_print, BIGFLOAT_FINALIZE, |
|
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298 bigfloat_equal, bigfloat_hash, |
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299 bigfloat_description, Lisp_Bigfloat); |
| 1983 | 300 |
| 2092 | 301 #endif /* HAVE_BIGFLOAT */ |
| 1983 | 302 |
| 303 Lisp_Object Qbigfloatp; | |
| 304 | |
| 305 DEFUN ("bigfloatp", Fbigfloatp, 1, 1, 0, /* | |
| 306 Return t if OBJECT is a bigfloat, nil otherwise. | |
| 307 */ | |
| 308 (object)) | |
| 309 { | |
| 310 return BIGFLOATP (object) ? Qt : Qnil; | |
| 311 } | |
| 312 | |
| 2092 | 313 DEFUN ("bigfloat-get-precision", Fbigfloat_get_precision, 1, 1, 0, /* |
| 314 Return the precision of bigfloat F as an integer. | |
| 315 */ | |
| 316 (f)) | |
| 317 { | |
| 318 CHECK_BIGFLOAT (f); | |
| 319 #ifdef HAVE_BIGNUM | |
| 320 bignum_set_ulong (scratch_bignum, XBIGFLOAT_GET_PREC (f)); | |
| 321 return Fcanonicalize_number (make_bignum_bg (scratch_bignum)); | |
| 322 #else | |
| 323 return make_int ((int) XBIGFLOAT_GET_PREC (f)); | |
| 324 #endif | |
| 325 } | |
| 326 | |
| 327 DEFUN ("bigfloat-set-precision", Fbigfloat_set_precision, 2, 2, 0, /* | |
| 328 Set the precision of F, a bigfloat, to PRECISION, a nonnegative integer. | |
| 329 The new precision of F is returned. Note that the return value may differ | |
| 330 from PRECISION if the underlying library is unable to support exactly | |
| 331 PRECISION bits of precision. | |
| 332 */ | |
| 333 (f, precision)) | |
| 334 { | |
| 335 unsigned long prec; | |
| 336 | |
| 337 CHECK_BIGFLOAT (f); | |
| 338 if (INTP (precision)) | |
| 339 { | |
| 340 prec = (XINT (precision) <= 0) ? 1UL : (unsigned long) XINT (precision); | |
| 341 } | |
| 342 #ifdef HAVE_BIGNUM | |
| 343 else if (BIGNUMP (precision)) | |
| 344 { | |
| 345 prec = bignum_fits_ulong_p (XBIGNUM_DATA (precision)) | |
| 346 ? bignum_to_ulong (XBIGNUM_DATA (precision)) | |
| 347 : UINT_MAX; | |
| 348 } | |
| 349 #endif | |
| 350 else | |
| 351 { | |
| 352 dead_wrong_type_argument (Qintegerp, f); | |
| 353 return Qnil; | |
| 354 } | |
| 355 | |
| 356 XBIGFLOAT_SET_PREC (f, prec); | |
| 357 return Fbigfloat_get_precision (f); | |
| 358 } | |
| 359 | |
| 1983 | 360 static int |
| 2286 | 361 default_float_precision_changed (Lisp_Object UNUSED (sym), Lisp_Object *val, |
| 362 Lisp_Object UNUSED (in_object), | |
| 363 int UNUSED (flags)) | |
| 1983 | 364 { |
| 365 unsigned long prec; | |
| 366 | |
| 367 CONCHECK_INTEGER (*val); | |
| 368 #ifdef HAVE_BIGFLOAT | |
| 369 if (INTP (*val)) | |
| 370 prec = XINT (*val); | |
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371 else |
| 1983 | 372 { |
| 373 if (!bignum_fits_ulong_p (XBIGNUM_DATA (*val))) | |
| 374 args_out_of_range_3 (*val, Qzero, Vbigfloat_max_prec); | |
| 375 prec = bignum_to_ulong (XBIGNUM_DATA (*val)); | |
| 376 } | |
| 377 if (prec != 0UL) | |
| 378 bigfloat_set_default_prec (prec); | |
| 379 #endif | |
| 380 return 0; | |
| 381 } | |
| 382 | |
| 383 | |
| 384 /********************************* Floating *********************************/ | |
| 385 Lisp_Object | |
| 386 make_floating (double d) | |
| 387 { | |
| 388 #ifdef HAVE_BIGFLOAT | |
| 389 if (ZEROP (Vdefault_float_precision)) | |
| 390 #endif | |
| 391 return make_float (d); | |
| 392 #ifdef HAVE_BIGFLOAT | |
| 393 else | |
| 394 return make_bigfloat (d, 0UL); | |
| 395 #endif | |
| 396 } | |
| 397 | |
| 398 DEFUN ("floatingp", Ffloatingp, 1, 1, 0, /* | |
| 399 Return t if OBJECT is a floating point number of any kind, nil otherwise. | |
| 400 */ | |
| 401 (object)) | |
| 402 { | |
| 403 return FLOATINGP (object) ? Qt : Qnil; | |
| 404 } | |
| 405 | |
| 406 | |
| 407 /********************************** Reals ***********************************/ | |
| 408 DEFUN ("realp", Frealp, 1, 1, 0, /* | |
| 409 Return t if OBJECT is a real, nil otherwise. | |
| 410 */ | |
| 411 (object)) | |
| 412 { | |
| 413 return REALP (object) ? Qt : Qnil; | |
| 414 } | |
| 415 | |
| 416 | |
| 417 /********************************* Numbers **********************************/ | |
| 418 DEFUN ("canonicalize-number", Fcanonicalize_number, 1, 1, 0, /* | |
| 419 Return the canonical form of NUMBER. | |
| 420 */ | |
| 421 (number)) | |
| 422 { | |
| 423 /* The tests should go in order from larger, more expressive, or more | |
| 424 complex types to smaller, less expressive, or simpler types so that a | |
| 425 number can cascade all the way down to the simplest type if | |
| 426 appropriate. */ | |
| 427 #ifdef HAVE_RATIO | |
| 428 if (RATIOP (number) && | |
| 429 bignum_fits_long_p (XRATIO_DENOMINATOR (number)) && | |
| 430 bignum_to_long (XRATIO_DENOMINATOR (number)) == 1L) | |
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431 number = Fcanonicalize_number (make_bignum_bg (XRATIO_NUMERATOR (number))); |
| 1983 | 432 #endif |
| 433 #ifdef HAVE_BIGNUM | |
| 3391 | 434 if (BIGNUMP (number) && bignum_fits_emacs_int_p (XBIGNUM_DATA (number))) |
| 1983 | 435 { |
| 3391 | 436 EMACS_INT n = bignum_to_emacs_int (XBIGNUM_DATA (number)); |
| 1983 | 437 if (NUMBER_FITS_IN_AN_EMACS_INT (n)) |
| 438 number = make_int (n); | |
| 439 } | |
| 440 #endif | |
| 441 return number; | |
| 442 } | |
| 443 | |
| 444 enum number_type | |
| 445 get_number_type (Lisp_Object arg) | |
| 446 { | |
| 447 if (INTP (arg)) | |
| 448 return FIXNUM_T; | |
| 449 #ifdef HAVE_BIGNUM | |
| 450 if (BIGNUMP (arg)) | |
| 451 return BIGNUM_T; | |
| 452 #endif | |
| 453 #ifdef HAVE_RATIO | |
| 454 if (RATIOP (arg)) | |
| 455 return RATIO_T; | |
| 456 #endif | |
| 457 if (FLOATP (arg)) | |
| 458 return FLOAT_T; | |
| 459 #ifdef HAVE_BIGFLOAT | |
| 460 if (BIGFLOATP (arg)) | |
| 461 return BIGFLOAT_T; | |
| 462 #endif | |
| 463 /* Catch unintentional bad uses of this function */ | |
| 2500 | 464 ABORT (); |
| 1995 | 465 /* NOTREACHED */ |
| 466 return FIXNUM_T; | |
| 1983 | 467 } |
| 468 | |
| 469 /* Convert NUMBER to type TYPE. If TYPE is BIGFLOAT_T then use the indicated | |
| 470 PRECISION; otherwise, PRECISION is ignored. */ | |
| 471 static Lisp_Object | |
| 472 internal_coerce_number (Lisp_Object number, enum number_type type, | |
| 2286 | 473 #ifdef HAVE_BIGFLOAT |
| 474 unsigned long precision | |
| 475 #else | |
| 476 unsigned long UNUSED (precision) | |
| 477 #endif | |
| 478 ) | |
| 1983 | 479 { |
| 480 enum number_type current_type; | |
| 481 | |
| 482 if (CHARP (number)) | |
| 483 number = make_int (XCHAR (number)); | |
| 484 else if (MARKERP (number)) | |
| 485 number = make_int (marker_position (number)); | |
| 486 | |
| 487 /* Note that CHECK_NUMBER ensures that NUMBER is a supported type. Hence, | |
| 2500 | 488 we ABORT() in the #else sections below, because it shouldn't be possible |
| 1983 | 489 to arrive there. */ |
| 490 CHECK_NUMBER (number); | |
| 491 current_type = get_number_type (number); | |
| 492 switch (current_type) | |
| 493 { | |
| 494 case FIXNUM_T: | |
| 495 switch (type) | |
| 496 { | |
| 497 case FIXNUM_T: | |
| 498 return number; | |
| 499 case BIGNUM_T: | |
| 500 #ifdef HAVE_BIGNUM | |
| 501 return make_bignum (XREALINT (number)); | |
| 502 #else | |
| 2500 | 503 ABORT (); |
| 1983 | 504 #endif /* HAVE_BIGNUM */ |
| 505 case RATIO_T: | |
| 506 #ifdef HAVE_RATIO | |
| 507 return make_ratio (XREALINT (number), 1UL); | |
| 508 #else | |
| 2500 | 509 ABORT (); |
| 1983 | 510 #endif /* HAVE_RATIO */ |
| 511 case FLOAT_T: | |
| 512 return make_float (XREALINT (number)); | |
| 513 case BIGFLOAT_T: | |
| 514 #ifdef HAVE_BIGFLOAT | |
| 515 return make_bigfloat (XREALINT (number), precision); | |
| 516 #else | |
| 2500 | 517 ABORT (); |
| 1983 | 518 #endif /* HAVE_BIGFLOAT */ |
| 519 } | |
| 520 case BIGNUM_T: | |
| 521 #ifdef HAVE_BIGNUM | |
| 522 switch (type) | |
| 523 { | |
| 524 case FIXNUM_T: | |
| 525 return make_int (bignum_to_long (XBIGNUM_DATA (number))); | |
| 526 case BIGNUM_T: | |
| 527 return number; | |
| 528 case RATIO_T: | |
| 529 #ifdef HAVE_RATIO | |
| 530 bignum_set_long (scratch_bignum, 1L); | |
| 531 return make_ratio_bg (XBIGNUM_DATA (number), scratch_bignum); | |
| 532 #else | |
| 2500 | 533 ABORT (); |
| 1983 | 534 #endif /* HAVE_RATIO */ |
| 535 case FLOAT_T: | |
| 536 return make_float (bignum_to_double (XBIGNUM_DATA (number))); | |
| 537 case BIGFLOAT_T: | |
| 538 #ifdef HAVE_BIGFLOAT | |
| 539 { | |
| 540 Lisp_Object temp; | |
| 541 temp = make_bigfloat (0.0, precision); | |
| 542 bigfloat_set_bignum (XBIGFLOAT_DATA (temp), XBIGNUM_DATA (number)); | |
| 543 return temp; | |
| 544 } | |
| 545 #else | |
| 2500 | 546 ABORT (); |
| 1983 | 547 #endif /* HAVE_BIGFLOAT */ |
| 548 } | |
| 549 #else | |
| 2500 | 550 ABORT (); |
| 1983 | 551 #endif /* HAVE_BIGNUM */ |
| 552 case RATIO_T: | |
| 553 #ifdef HAVE_RATIO | |
| 554 switch (type) | |
| 555 { | |
| 556 case FIXNUM_T: | |
| 557 bignum_div (scratch_bignum, XRATIO_NUMERATOR (number), | |
| 558 XRATIO_DENOMINATOR (number)); | |
| 559 return make_int (bignum_to_long (scratch_bignum)); | |
| 560 case BIGNUM_T: | |
| 561 bignum_div (scratch_bignum, XRATIO_NUMERATOR (number), | |
| 562 XRATIO_DENOMINATOR (number)); | |
| 563 return make_bignum_bg (scratch_bignum); | |
| 564 case RATIO_T: | |
| 565 return number; | |
| 566 case FLOAT_T: | |
| 567 return make_float (ratio_to_double (XRATIO_DATA (number))); | |
| 568 case BIGFLOAT_T: | |
| 569 #ifdef HAVE_BIGFLOAT | |
| 570 { | |
| 571 Lisp_Object temp; | |
| 572 temp = make_bigfloat (0.0, precision); | |
| 573 bigfloat_set_ratio (XBIGFLOAT_DATA (temp), XRATIO_DATA (number)); | |
| 574 return temp; | |
| 575 } | |
| 576 #else | |
| 2500 | 577 ABORT (); |
| 1983 | 578 #endif /* HAVE_BIGFLOAT */ |
| 579 } | |
| 580 #else | |
| 2500 | 581 ABORT (); |
| 1983 | 582 #endif /* HAVE_RATIO */ |
| 583 case FLOAT_T: | |
| 584 switch (type) | |
| 585 { | |
| 586 case FIXNUM_T: | |
|
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587 return Ftruncate (number, Qnil); |
| 1983 | 588 case BIGNUM_T: |
| 589 #ifdef HAVE_BIGNUM | |
| 590 bignum_set_double (scratch_bignum, XFLOAT_DATA (number)); | |
| 591 return make_bignum_bg (scratch_bignum); | |
| 592 #else | |
| 2500 | 593 ABORT (); |
| 1983 | 594 #endif /* HAVE_BIGNUM */ |
| 595 case RATIO_T: | |
| 596 #ifdef HAVE_RATIO | |
| 597 ratio_set_double (scratch_ratio, XFLOAT_DATA (number)); | |
| 598 return make_ratio_rt (scratch_ratio); | |
| 599 #else | |
| 2500 | 600 ABORT (); |
| 1983 | 601 #endif /* HAVE_RATIO */ |
| 602 case FLOAT_T: | |
| 603 return number; | |
| 604 case BIGFLOAT_T: | |
| 605 #ifdef HAVE_BIGFLOAT | |
| 606 bigfloat_set_prec (scratch_bigfloat, precision); | |
| 607 bigfloat_set_double (scratch_bigfloat, XFLOAT_DATA (number)); | |
| 608 return make_bigfloat_bf (scratch_bigfloat); | |
| 609 #else | |
| 2500 | 610 ABORT (); |
| 1983 | 611 #endif /* HAVE_BIGFLOAT */ |
| 612 } | |
| 613 case BIGFLOAT_T: | |
| 614 #ifdef HAVE_BIGFLOAT | |
| 615 switch (type) | |
| 616 { | |
| 617 case FIXNUM_T: | |
| 618 return make_int (bigfloat_to_long (XBIGFLOAT_DATA (number))); | |
| 619 case BIGNUM_T: | |
| 620 #ifdef HAVE_BIGNUM | |
| 621 bignum_set_bigfloat (scratch_bignum, XBIGFLOAT_DATA (number)); | |
| 622 return make_bignum_bg (scratch_bignum); | |
| 623 #else | |
| 2500 | 624 ABORT (); |
| 1983 | 625 #endif /* HAVE_BIGNUM */ |
| 626 case RATIO_T: | |
| 627 #ifdef HAVE_RATIO | |
| 628 ratio_set_bigfloat (scratch_ratio, XBIGFLOAT_DATA (number)); | |
| 629 return make_ratio_rt (scratch_ratio); | |
| 630 #else | |
| 2500 | 631 ABORT (); |
| 1983 | 632 #endif |
| 633 case FLOAT_T: | |
| 634 return make_float (bigfloat_to_double (XBIGFLOAT_DATA (number))); | |
| 635 case BIGFLOAT_T: | |
| 636 /* FIXME: Do we need to change the precision? */ | |
| 637 return number; | |
| 638 } | |
| 639 #else | |
| 2500 | 640 ABORT (); |
| 1983 | 641 #endif /* HAVE_BIGFLOAT */ |
| 642 } | |
| 2500 | 643 ABORT (); |
| 1995 | 644 /* NOTREACHED */ |
| 645 return Qzero; | |
| 1983 | 646 } |
| 647 | |
| 648 /* This function promotes its arguments as necessary to make them both the | |
| 649 same type. It destructively modifies its arguments to do so. Characters | |
| 650 and markers are ALWAYS converted to integers. */ | |
| 651 enum number_type | |
| 652 promote_args (Lisp_Object *arg1, Lisp_Object *arg2) | |
| 653 { | |
| 654 enum number_type type1, type2; | |
| 655 | |
| 656 if (CHARP (*arg1)) | |
| 657 *arg1 = make_int (XCHAR (*arg1)); | |
| 658 else if (MARKERP (*arg1)) | |
| 659 *arg1 = make_int (marker_position (*arg1)); | |
| 660 if (CHARP (*arg2)) | |
| 661 *arg2 = make_int (XCHAR (*arg2)); | |
| 662 else if (MARKERP (*arg2)) | |
| 663 *arg2 = make_int (marker_position (*arg2)); | |
| 664 | |
| 665 CHECK_NUMBER (*arg1); | |
| 666 CHECK_NUMBER (*arg2); | |
| 667 | |
| 668 type1 = get_number_type (*arg1); | |
| 669 type2 = get_number_type (*arg2); | |
| 670 | |
| 671 if (type1 < type2) | |
| 672 { | |
| 673 *arg1 = internal_coerce_number (*arg1, type2, | |
| 674 #ifdef HAVE_BIGFLOAT | |
| 675 type2 == BIGFLOAT_T | |
| 676 ? XBIGFLOAT_GET_PREC (*arg2) : | |
| 677 #endif | |
| 678 0UL); | |
| 679 return type2; | |
| 680 } | |
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681 |
| 1983 | 682 if (type2 < type1) |
| 683 { | |
| 684 *arg2 = internal_coerce_number (*arg2, type1, | |
| 685 #ifdef HAVE_BIGFLOAT | |
| 686 type1 == BIGFLOAT_T | |
| 687 ? XBIGFLOAT_GET_PREC (*arg1) : | |
| 688 #endif | |
| 689 0UL); | |
| 690 return type1; | |
| 691 } | |
| 692 | |
| 693 /* No conversion necessary */ | |
| 694 return type1; | |
| 695 } | |
| 696 | |
| 697 DEFUN ("coerce-number", Fcoerce_number, 2, 3, 0, /* | |
| 698 Convert NUMBER to the indicated type, possibly losing information. | |
| 699 Do not call this function. Use `coerce' instead. | |
| 700 | |
| 3025 | 701 TYPE is one of the symbols `fixnum', `integer', `ratio', `float', or |
| 702 `bigfloat'. Not all of these types may be supported. | |
| 1983 | 703 |
| 704 PRECISION is the number of bits of precision to use when converting to | |
| 705 bigfloat; it is ignored otherwise. If nil, the default precision is used. | |
| 706 | |
| 707 Note that some conversions lose information. No error is signaled in such | |
| 708 cases; the information is silently lost. | |
| 709 */ | |
| 2595 | 710 (number, type, USED_IF_BIGFLOAT (precision))) |
| 1983 | 711 { |
| 712 CHECK_SYMBOL (type); | |
| 713 if (EQ (type, Qfixnum)) | |
| 714 return internal_coerce_number (number, FIXNUM_T, 0UL); | |
| 715 else if (EQ (type, Qinteger)) | |
| 716 { | |
| 717 /* If bignums are available, we always convert to one first, then | |
| 718 downgrade to a fixnum if possible. */ | |
| 719 #ifdef HAVE_BIGNUM | |
| 720 return Fcanonicalize_number | |
| 721 (internal_coerce_number (number, BIGNUM_T, 0UL)); | |
| 722 #else | |
| 723 return internal_coerce_number (number, FIXNUM_T, 0UL); | |
| 724 #endif | |
| 725 } | |
| 726 #ifdef HAVE_RATIO | |
| 727 else if (EQ (type, Qratio)) | |
| 728 return internal_coerce_number (number, RATIO_T, 0UL); | |
| 729 #endif | |
| 730 else if (EQ (type, Qfloat)) | |
| 731 return internal_coerce_number (number, FLOAT_T, 0UL); | |
| 732 #ifdef HAVE_BIGFLOAT | |
| 733 else if (EQ (type, Qbigfloat)) | |
| 734 { | |
| 735 unsigned long prec; | |
| 736 | |
| 737 if (NILP (precision)) | |
| 738 prec = bigfloat_get_default_prec (); | |
| 739 else | |
| 740 { | |
| 741 CHECK_INTEGER (precision); | |
| 742 #ifdef HAVE_BIGNUM | |
| 743 if (INTP (precision)) | |
| 744 #endif /* HAVE_BIGNUM */ | |
| 745 prec = (unsigned long) XREALINT (precision); | |
| 746 #ifdef HAVE_BIGNUM | |
| 747 else | |
| 748 { | |
| 749 if (!bignum_fits_ulong_p (XBIGNUM_DATA (precision))) | |
| 750 args_out_of_range (precision, Vbigfloat_max_prec); | |
| 751 prec = bignum_to_ulong (XBIGNUM_DATA (precision)); | |
| 752 } | |
| 753 #endif /* HAVE_BIGNUM */ | |
| 754 } | |
| 755 return internal_coerce_number (number, BIGFLOAT_T, prec); | |
| 756 } | |
| 757 #endif /* HAVE_BIGFLOAT */ | |
| 758 | |
| 759 Fsignal (Qunsupported_type, type); | |
| 760 /* NOTREACHED */ | |
| 761 return Qnil; | |
| 762 } | |
| 763 | |
| 764 | |
| 765 void | |
| 766 syms_of_number (void) | |
| 767 { | |
| 768 #ifdef HAVE_BIGNUM | |
|
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769 INIT_LISP_OBJECT (bignum); |
| 1983 | 770 #endif |
| 771 #ifdef HAVE_RATIO | |
|
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772 INIT_LISP_OBJECT (ratio); |
| 1983 | 773 #endif |
| 774 #ifdef HAVE_BIGFLOAT | |
|
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775 INIT_LISP_OBJECT (bigfloat); |
| 1983 | 776 #endif |
| 777 | |
| 778 /* Type predicates */ | |
| 779 DEFSYMBOL (Qrationalp); | |
| 780 DEFSYMBOL (Qfloatingp); | |
| 781 DEFSYMBOL (Qrealp); | |
| 782 DEFSYMBOL (Qbignump); | |
| 783 DEFSYMBOL (Qratiop); | |
| 784 DEFSYMBOL (Qbigfloatp); | |
| 785 | |
| 786 /* Functions */ | |
| 787 DEFSUBR (Fbignump); | |
| 788 DEFSUBR (Fratiop); | |
| 789 DEFSUBR (Frationalp); | |
| 790 DEFSUBR (Fnumerator); | |
| 791 DEFSUBR (Fdenominator); | |
| 792 DEFSUBR (Fbigfloatp); | |
| 2092 | 793 DEFSUBR (Fbigfloat_get_precision); |
| 794 DEFSUBR (Fbigfloat_set_precision); | |
| 2001 | 795 DEFSUBR (Ffloatingp); |
| 1983 | 796 DEFSUBR (Frealp); |
| 797 DEFSUBR (Fcanonicalize_number); | |
| 798 DEFSUBR (Fcoerce_number); | |
| 799 | |
| 800 /* Errors */ | |
| 801 DEFERROR_STANDARD (Qunsupported_type, Qwrong_type_argument); | |
| 802 } | |
| 803 | |
| 804 void | |
| 805 vars_of_number (void) | |
| 806 { | |
| 2051 | 807 /* These variables are Lisp variables rather than number variables so that |
| 808 we can put bignums in them. */ | |
| 1983 | 809 DEFVAR_LISP_MAGIC ("default-float-precision", &Vdefault_float_precision, /* |
| 810 The default floating-point precision for newly created floating point values. | |
| 2092 | 811 This should be 0 to create Lisp float types, or an unsigned integer no greater |
| 812 than `bigfloat-maximum-precision' to create Lisp bigfloat types with the | |
| 813 indicated precision. | |
| 1983 | 814 */ default_float_precision_changed); |
| 815 Vdefault_float_precision = make_int (0); | |
| 816 | |
| 2092 | 817 DEFVAR_CONST_LISP ("bigfloat-maximum-precision", &Vbigfloat_max_prec /* |
| 1983 | 818 The maximum number of bits of precision a bigfloat can have. |
| 2092 | 819 This is determined by the underlying library used to implement bigfloats. |
| 1983 | 820 */); |
| 821 | |
| 2061 | 822 #ifdef HAVE_BIGFLOAT |
|
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823 /* Don't create a bignum here. Otherwise, we lose with NEW_GC + pdump. |
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824 See reinit_vars_of_number(). */ |
| 2061 | 825 Vbigfloat_max_prec = make_int (EMACS_INT_MAX); |
| 826 #else | |
| 2051 | 827 Vbigfloat_max_prec = make_int (0); |
| 828 #endif /* HAVE_BIGFLOAT */ | |
| 829 | |
| 1983 | 830 Fprovide (intern ("number-types")); |
| 831 #ifdef HAVE_BIGNUM | |
| 832 Fprovide (intern ("bignum")); | |
| 833 #endif | |
| 834 #ifdef HAVE_RATIO | |
| 835 Fprovide (intern ("ratio")); | |
| 836 #endif | |
| 837 #ifdef HAVE_BIGFLOAT | |
| 838 Fprovide (intern ("bigfloat")); | |
| 839 #endif | |
| 840 } | |
| 841 | |
| 842 void | |
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parents:
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843 reinit_vars_of_number (void) |
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parents:
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844 { |
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Jerry James <james@xemacs.org>
parents:
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845 #if defined(HAVE_BIGFLOAT) && defined(HAVE_BIGNUM) |
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parents:
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846 Vbigfloat_max_prec = make_bignum (0L); |
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parents:
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847 bignum_set_ulong (XBIGNUM_DATA (Vbigfloat_max_prec), ULONG_MAX); |
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parents:
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848 #endif |
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parents:
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849 } |
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parents:
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850 |
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parents:
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851 void |
| 1983 | 852 init_number (void) |
| 853 { | |
| 854 if (!number_initialized) | |
| 855 { | |
| 856 number_initialized = 1; | |
| 857 | |
| 858 #ifdef WITH_GMP | |
| 859 init_number_gmp (); | |
| 860 #endif | |
| 861 #ifdef WITH_MP | |
| 862 init_number_mp (); | |
| 863 #endif | |
| 864 | |
| 865 #ifdef HAVE_BIGNUM | |
| 866 bignum_init (scratch_bignum); | |
| 867 bignum_init (scratch_bignum2); | |
| 868 #endif | |
| 869 | |
| 870 #ifdef HAVE_RATIO | |
| 871 ratio_init (scratch_ratio); | |
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Aidan Kehoe <kehoea@parhasard.net>
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872 ratio_init (scratch_ratio2); |
| 1983 | 873 #endif |
| 874 | |
| 875 #ifdef HAVE_BIGFLOAT | |
| 876 bigfloat_init (scratch_bigfloat); | |
| 877 bigfloat_init (scratch_bigfloat2); | |
| 878 #endif | |
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879 |
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parents:
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880 #ifndef PDUMP |
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881 reinit_vars_of_number (); |
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parents:
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882 #endif |
| 1983 | 883 } |
| 884 } |