Mercurial > hg > xemacs-beta
annotate src/number.c @ 4883:f730384b8ddf
Be more careful about canonical integer forms when dealing with ratios.
2010-01-24 Aidan Kehoe <kehoea@parhasard.net>
* number.c (Fnumerator, Fdenominator, Fcanonicalize_number):
Be more careful to return integers in their canonical forms here,
and to give the same answer all the time when treating a rational
that is itself is an integer as a ratio.
| author | Aidan Kehoe <kehoea@parhasard.net> |
|---|---|
| date | Sun, 24 Jan 2010 19:56:31 +0000 |
| parents | 2fc0e2f18322 |
| children | 1e9078742fa7 19a72041c5ed |
| rev | line source |
|---|---|
| 1983 | 1 /* Numeric types for XEmacs. |
| 2 Copyright (C) 2004 Jerry James. | |
| 3 | |
| 4 This file is part of XEmacs. | |
| 5 | |
| 6 XEmacs is free software; you can redistribute it and/or modify it | |
| 7 under the terms of the GNU General Public License as published by the | |
| 8 Free Software Foundation; either version 2, or (at your option) any | |
| 9 later version. | |
| 10 | |
| 11 XEmacs is distributed in the hope that it will be useful, but WITHOUT | |
| 12 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 13 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 14 for more details. | |
| 15 | |
| 16 You should have received a copy of the GNU General Public License | |
| 17 along with XEmacs; see the file COPYING. If not, write to | |
|
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18 the Free Software Foundation, Inc., 51 Franklin St - Fifth Floor, |
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19 Boston, MA 02111-1301, USA. */ |
| 1983 | 20 |
| 21 /* Synched up with: Not in FSF. */ | |
| 22 | |
| 23 #include <config.h> | |
| 24 #include <limits.h> | |
| 25 #include "lisp.h" | |
| 26 | |
| 2595 | 27 #ifdef HAVE_BIGFLOAT |
| 28 #define USED_IF_BIGFLOAT(decl) decl | |
| 29 #else | |
| 30 #define USED_IF_BIGFLOAT(decl) UNUSED (decl) | |
| 31 #endif | |
| 32 | |
| 2001 | 33 Lisp_Object Qrationalp, Qfloatingp, Qrealp; |
| 1983 | 34 Lisp_Object Vdefault_float_precision; |
| 35 Fixnum Vmost_negative_fixnum, Vmost_positive_fixnum; | |
| 36 static Lisp_Object Qunsupported_type; | |
| 37 static Lisp_Object Vbigfloat_max_prec; | |
| 38 static int number_initialized; | |
| 39 | |
| 40 #ifdef HAVE_BIGNUM | |
| 41 bignum scratch_bignum, scratch_bignum2; | |
| 42 #endif | |
| 43 #ifdef HAVE_RATIO | |
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44 ratio scratch_ratio, scratch_ratio2; |
| 1983 | 45 #endif |
| 46 #ifdef HAVE_BIGFLOAT | |
| 47 bigfloat scratch_bigfloat, scratch_bigfloat2; | |
| 48 #endif | |
| 49 | |
| 50 /********************************* Bignums **********************************/ | |
| 51 #ifdef HAVE_BIGNUM | |
| 52 static void | |
| 2286 | 53 bignum_print (Lisp_Object obj, Lisp_Object printcharfun, |
| 54 int UNUSED (escapeflag)) | |
| 1983 | 55 { |
| 56 CIbyte *bstr = bignum_to_string (XBIGNUM_DATA (obj), 10); | |
| 57 write_c_string (printcharfun, bstr); | |
| 58 xfree (bstr, CIbyte *); | |
| 59 } | |
| 60 | |
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61 #ifdef NEW_GC |
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62 static void |
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63 bignum_finalize (void *header, int for_disksave) |
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64 { |
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65 if (!for_disksave) |
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66 { |
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67 struct Lisp_Bignum *num = (struct Lisp_Bignum *) header; |
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68 bignum_fini (num->data); |
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69 } |
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70 } |
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71 #define BIGNUM_FINALIZE bignum_finalize |
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72 #else |
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73 #define BIGNUM_FINALIZE 0 |
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74 #endif |
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75 |
| 1983 | 76 static int |
| 2286 | 77 bignum_equal (Lisp_Object obj1, Lisp_Object obj2, int UNUSED (depth)) |
| 1983 | 78 { |
| 79 return bignum_eql (XBIGNUM_DATA (obj1), XBIGNUM_DATA (obj2)); | |
| 80 } | |
| 81 | |
| 82 static Hashcode | |
| 2286 | 83 bignum_hash (Lisp_Object obj, int UNUSED (depth)) |
| 1983 | 84 { |
| 85 return bignum_hashcode (XBIGNUM_DATA (obj)); | |
| 86 } | |
| 87 | |
| 2551 | 88 static void |
| 89 bignum_convert (const void *object, void **data, Bytecount *size) | |
| 90 { | |
| 91 CIbyte *bstr = bignum_to_string (*(bignum *)object, 10); | |
| 92 *data = bstr; | |
| 93 *size = strlen(bstr)+1; | |
| 94 } | |
| 95 | |
| 96 static void | |
| 97 bignum_convfree (const void * UNUSED (object), void *data, | |
| 98 Bytecount UNUSED (size)) | |
| 99 { | |
| 100 xfree (data, void *); | |
| 101 } | |
| 102 | |
| 103 static void * | |
| 104 bignum_deconvert (void *object, void *data, Bytecount UNUSED (size)) | |
| 105 { | |
| 106 bignum *b = (bignum *) object; | |
| 107 bignum_init(*b); | |
| 108 bignum_set_string(*b, (const char *) data, 10); | |
| 109 return object; | |
| 110 } | |
| 111 | |
| 112 static const struct opaque_convert_functions bignum_opc = { | |
| 113 bignum_convert, | |
| 114 bignum_convfree, | |
| 115 bignum_deconvert | |
| 116 }; | |
| 117 | |
| 1983 | 118 static const struct memory_description bignum_description[] = { |
| 2551 | 119 { XD_OPAQUE_DATA_CONVERTIBLE, offsetof (Lisp_Bignum, data), |
| 120 0, { &bignum_opc }, XD_FLAG_NO_KKCC }, | |
| 1983 | 121 { XD_END } |
| 122 }; | |
| 123 | |
| 2551 | 124 DEFINE_BASIC_LRECORD_IMPLEMENTATION ("bignum", bignum, 1, 0, bignum_print, |
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125 BIGNUM_FINALIZE, bignum_equal, |
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126 bignum_hash, bignum_description, |
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127 Lisp_Bignum); |
| 1983 | 128 |
| 2092 | 129 #endif /* HAVE_BIGNUM */ |
| 1983 | 130 |
| 131 Lisp_Object Qbignump; | |
| 132 | |
| 133 DEFUN ("bignump", Fbignump, 1, 1, 0, /* | |
| 134 Return t if OBJECT is a bignum, nil otherwise. | |
| 135 */ | |
| 136 (object)) | |
| 137 { | |
| 138 return BIGNUMP (object) ? Qt : Qnil; | |
| 139 } | |
| 140 | |
| 141 | |
| 142 /********************************* Integers *********************************/ | |
| 143 DEFUN ("integerp", Fintegerp, 1, 1, 0, /* | |
| 144 Return t if OBJECT is an integer, nil otherwise. | |
| 145 */ | |
| 146 (object)) | |
| 147 { | |
| 148 return INTEGERP (object) ? Qt : Qnil; | |
| 149 } | |
| 150 | |
| 151 DEFUN ("evenp", Fevenp, 1, 1, 0, /* | |
| 152 Return t if INTEGER is even, nil otherwise. | |
| 153 */ | |
| 154 (integer)) | |
| 155 { | |
| 156 CONCHECK_INTEGER (integer); | |
| 1996 | 157 return (BIGNUMP (integer) |
| 158 ? bignum_evenp (XBIGNUM_DATA (integer)) | |
| 159 : XTYPE (integer) == Lisp_Type_Int_Even) ? Qt : Qnil; | |
| 1983 | 160 } |
| 161 | |
| 2019 | 162 DEFUN ("oddp", Foddp, 1, 1, 0, /* |
| 1983 | 163 Return t if INTEGER is odd, nil otherwise. |
| 164 */ | |
| 165 (integer)) | |
| 166 { | |
| 167 CONCHECK_INTEGER (integer); | |
| 1996 | 168 return (BIGNUMP (integer) |
| 169 ? bignum_oddp (XBIGNUM_DATA (integer)) | |
| 170 : XTYPE (integer) == Lisp_Type_Int_Odd) ? Qt : Qnil; | |
| 1983 | 171 } |
| 172 | |
| 173 | |
| 174 /********************************** Ratios **********************************/ | |
| 175 #ifdef HAVE_RATIO | |
| 176 static void | |
| 2286 | 177 ratio_print (Lisp_Object obj, Lisp_Object printcharfun, |
| 178 int UNUSED (escapeflag)) | |
| 1983 | 179 { |
| 180 CIbyte *rstr = ratio_to_string (XRATIO_DATA (obj), 10); | |
| 181 write_c_string (printcharfun, rstr); | |
| 182 xfree (rstr, CIbyte *); | |
| 183 } | |
| 184 | |
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185 #ifdef NEW_GC |
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186 static void |
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187 ratio_finalize (void *header, int for_disksave) |
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188 { |
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189 if (!for_disksave) |
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190 { |
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191 struct Lisp_Ratio *num = (struct Lisp_Ratio *) header; |
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192 ratio_fini (num->data); |
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193 } |
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194 } |
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195 #define RATIO_FINALIZE ratio_finalize |
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196 #else |
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197 #define RATIO_FINALIZE 0 |
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198 #endif |
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199 |
| 1983 | 200 static int |
| 2286 | 201 ratio_equal (Lisp_Object obj1, Lisp_Object obj2, int UNUSED (depth)) |
| 1983 | 202 { |
| 203 return ratio_eql (XRATIO_DATA (obj1), XRATIO_DATA (obj2)); | |
| 204 } | |
| 205 | |
| 206 static Hashcode | |
| 2286 | 207 ratio_hash (Lisp_Object obj, int UNUSED (depth)) |
| 1983 | 208 { |
| 209 return ratio_hashcode (XRATIO_DATA (obj)); | |
| 210 } | |
| 211 | |
| 212 static const struct memory_description ratio_description[] = { | |
| 213 { XD_OPAQUE_PTR, offsetof (Lisp_Ratio, data) }, | |
| 214 { XD_END } | |
| 215 }; | |
| 216 | |
| 2061 | 217 DEFINE_BASIC_LRECORD_IMPLEMENTATION ("ratio", ratio, 0, 0, ratio_print, |
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218 RATIO_FINALIZE, ratio_equal, ratio_hash, |
| 2061 | 219 ratio_description, Lisp_Ratio); |
| 1983 | 220 |
| 2092 | 221 #endif /* HAVE_RATIO */ |
| 1983 | 222 |
| 223 Lisp_Object Qratiop; | |
| 224 | |
| 225 DEFUN ("ratiop", Fratiop, 1, 1, 0, /* | |
| 226 Return t if OBJECT is a ratio, nil otherwise. | |
| 227 */ | |
| 228 (object)) | |
| 229 { | |
| 230 return RATIOP (object) ? Qt : Qnil; | |
| 231 } | |
| 232 | |
| 233 | |
| 234 /******************************** Rationals *********************************/ | |
| 235 DEFUN ("rationalp", Frationalp, 1, 1, 0, /* | |
| 236 Return t if OBJECT is a rational, nil otherwise. | |
| 237 */ | |
| 238 (object)) | |
| 239 { | |
| 240 return RATIONALP (object) ? Qt : Qnil; | |
| 241 } | |
| 242 | |
| 243 DEFUN ("numerator", Fnumerator, 1, 1, 0, /* | |
| 244 Return the numerator of the canonical form of RATIONAL. | |
| 245 If RATIONAL is an integer, RATIONAL is returned. | |
| 246 */ | |
| 247 (rational)) | |
| 248 { | |
| 249 CONCHECK_RATIONAL (rational); | |
| 250 #ifdef HAVE_RATIO | |
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251 if (RATIOP (rational)) |
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252 { |
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253 return |
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254 Fcanonicalize_number (make_bignum_bg (XRATIO_NUMERATOR (rational))); |
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255 } |
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256 #endif |
| 1983 | 257 return rational; |
| 258 } | |
| 259 | |
| 260 DEFUN ("denominator", Fdenominator, 1, 1, 0, /* | |
| 261 Return the denominator of the canonical form of RATIONAL. | |
| 262 If RATIONAL is an integer, 1 is returned. | |
| 263 */ | |
| 264 (rational)) | |
| 265 { | |
| 266 CONCHECK_RATIONAL (rational); | |
| 267 #ifdef HAVE_RATIO | |
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268 if (RATIOP (rational)) |
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269 { |
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270 return Fcanonicalize_number (make_bignum_bg |
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271 (XRATIO_DENOMINATOR (rational))); |
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272 } |
| 1983 | 273 #endif |
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274 return make_int (1); |
| 1983 | 275 } |
| 276 | |
| 277 | |
| 278 /******************************** Bigfloats *********************************/ | |
| 279 #ifdef HAVE_BIGFLOAT | |
| 280 static void | |
| 2286 | 281 bigfloat_print (Lisp_Object obj, Lisp_Object printcharfun, |
| 282 int UNUSED (escapeflag)) | |
| 1983 | 283 { |
| 284 CIbyte *fstr = bigfloat_to_string (XBIGFLOAT_DATA (obj), 10); | |
| 285 write_c_string (printcharfun, fstr); | |
| 286 xfree (fstr, CIbyte *); | |
| 287 } | |
| 288 | |
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289 #ifdef NEW_GC |
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290 static void |
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291 bigfloat_finalize (void *header, int for_disksave) |
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292 { |
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293 if (!for_disksave) |
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294 { |
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295 struct Lisp_Bigfloat *num = (struct Lisp_Bigfloat *) header; |
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296 bigfloat_fini (num->bf); |
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297 } |
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298 } |
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299 #define BIGFLOAT_FINALIZE bigfloat_finalize |
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300 #else |
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301 #define BIGFLOAT_FINALIZE 0 |
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302 #endif |
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303 |
| 1983 | 304 static int |
| 2286 | 305 bigfloat_equal (Lisp_Object obj1, Lisp_Object obj2, int UNUSED (depth)) |
| 1983 | 306 { |
| 307 return bigfloat_eql (XBIGFLOAT_DATA (obj1), XBIGFLOAT_DATA (obj2)); | |
| 308 } | |
| 309 | |
| 310 static Hashcode | |
| 2286 | 311 bigfloat_hash (Lisp_Object obj, int UNUSED (depth)) |
| 1983 | 312 { |
| 313 return bigfloat_hashcode (XBIGFLOAT_DATA (obj)); | |
| 314 } | |
| 315 | |
| 316 static const struct memory_description bigfloat_description[] = { | |
| 317 { XD_OPAQUE_PTR, offsetof (Lisp_Bigfloat, bf) }, | |
| 318 { XD_END } | |
| 319 }; | |
| 320 | |
| 2061 | 321 DEFINE_BASIC_LRECORD_IMPLEMENTATION ("bigfloat", bigfloat, 1, 0, |
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322 bigfloat_print, BIGFLOAT_FINALIZE, |
| 2061 | 323 bigfloat_equal, bigfloat_hash, |
| 324 bigfloat_description, Lisp_Bigfloat); | |
| 1983 | 325 |
| 2092 | 326 #endif /* HAVE_BIGFLOAT */ |
| 1983 | 327 |
| 328 Lisp_Object Qbigfloatp; | |
| 329 | |
| 330 DEFUN ("bigfloatp", Fbigfloatp, 1, 1, 0, /* | |
| 331 Return t if OBJECT is a bigfloat, nil otherwise. | |
| 332 */ | |
| 333 (object)) | |
| 334 { | |
| 335 return BIGFLOATP (object) ? Qt : Qnil; | |
| 336 } | |
| 337 | |
| 2092 | 338 DEFUN ("bigfloat-get-precision", Fbigfloat_get_precision, 1, 1, 0, /* |
| 339 Return the precision of bigfloat F as an integer. | |
| 340 */ | |
| 341 (f)) | |
| 342 { | |
| 343 CHECK_BIGFLOAT (f); | |
| 344 #ifdef HAVE_BIGNUM | |
| 345 bignum_set_ulong (scratch_bignum, XBIGFLOAT_GET_PREC (f)); | |
| 346 return Fcanonicalize_number (make_bignum_bg (scratch_bignum)); | |
| 347 #else | |
| 348 return make_int ((int) XBIGFLOAT_GET_PREC (f)); | |
| 349 #endif | |
| 350 } | |
| 351 | |
| 352 DEFUN ("bigfloat-set-precision", Fbigfloat_set_precision, 2, 2, 0, /* | |
| 353 Set the precision of F, a bigfloat, to PRECISION, a nonnegative integer. | |
| 354 The new precision of F is returned. Note that the return value may differ | |
| 355 from PRECISION if the underlying library is unable to support exactly | |
| 356 PRECISION bits of precision. | |
| 357 */ | |
| 358 (f, precision)) | |
| 359 { | |
| 360 unsigned long prec; | |
| 361 | |
| 362 CHECK_BIGFLOAT (f); | |
| 363 if (INTP (precision)) | |
| 364 { | |
| 365 prec = (XINT (precision) <= 0) ? 1UL : (unsigned long) XINT (precision); | |
| 366 } | |
| 367 #ifdef HAVE_BIGNUM | |
| 368 else if (BIGNUMP (precision)) | |
| 369 { | |
| 370 prec = bignum_fits_ulong_p (XBIGNUM_DATA (precision)) | |
| 371 ? bignum_to_ulong (XBIGNUM_DATA (precision)) | |
| 372 : UINT_MAX; | |
| 373 } | |
| 374 #endif | |
| 375 else | |
| 376 { | |
| 377 dead_wrong_type_argument (Qintegerp, f); | |
| 378 return Qnil; | |
| 379 } | |
| 380 | |
| 381 XBIGFLOAT_SET_PREC (f, prec); | |
| 382 return Fbigfloat_get_precision (f); | |
| 383 } | |
| 384 | |
| 1983 | 385 static int |
| 2286 | 386 default_float_precision_changed (Lisp_Object UNUSED (sym), Lisp_Object *val, |
| 387 Lisp_Object UNUSED (in_object), | |
| 388 int UNUSED (flags)) | |
| 1983 | 389 { |
| 390 unsigned long prec; | |
| 391 | |
| 392 CONCHECK_INTEGER (*val); | |
| 393 #ifdef HAVE_BIGFLOAT | |
| 394 if (INTP (*val)) | |
| 395 prec = XINT (*val); | |
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396 else |
| 1983 | 397 { |
| 398 if (!bignum_fits_ulong_p (XBIGNUM_DATA (*val))) | |
| 399 args_out_of_range_3 (*val, Qzero, Vbigfloat_max_prec); | |
| 400 prec = bignum_to_ulong (XBIGNUM_DATA (*val)); | |
| 401 } | |
| 402 if (prec != 0UL) | |
| 403 bigfloat_set_default_prec (prec); | |
| 404 #endif | |
| 405 return 0; | |
| 406 } | |
| 407 | |
| 408 | |
| 409 /********************************* Floating *********************************/ | |
| 410 Lisp_Object | |
| 411 make_floating (double d) | |
| 412 { | |
| 413 #ifdef HAVE_BIGFLOAT | |
| 414 if (ZEROP (Vdefault_float_precision)) | |
| 415 #endif | |
| 416 return make_float (d); | |
| 417 #ifdef HAVE_BIGFLOAT | |
| 418 else | |
| 419 return make_bigfloat (d, 0UL); | |
| 420 #endif | |
| 421 } | |
| 422 | |
| 423 DEFUN ("floatingp", Ffloatingp, 1, 1, 0, /* | |
| 424 Return t if OBJECT is a floating point number of any kind, nil otherwise. | |
| 425 */ | |
| 426 (object)) | |
| 427 { | |
| 428 return FLOATINGP (object) ? Qt : Qnil; | |
| 429 } | |
| 430 | |
| 431 | |
| 432 /********************************** Reals ***********************************/ | |
| 433 DEFUN ("realp", Frealp, 1, 1, 0, /* | |
| 434 Return t if OBJECT is a real, nil otherwise. | |
| 435 */ | |
| 436 (object)) | |
| 437 { | |
| 438 return REALP (object) ? Qt : Qnil; | |
| 439 } | |
| 440 | |
| 441 | |
| 442 /********************************* Numbers **********************************/ | |
| 443 DEFUN ("canonicalize-number", Fcanonicalize_number, 1, 1, 0, /* | |
| 444 Return the canonical form of NUMBER. | |
| 445 */ | |
| 446 (number)) | |
| 447 { | |
| 448 /* The tests should go in order from larger, more expressive, or more | |
| 449 complex types to smaller, less expressive, or simpler types so that a | |
| 450 number can cascade all the way down to the simplest type if | |
| 451 appropriate. */ | |
| 452 #ifdef HAVE_RATIO | |
| 453 if (RATIOP (number) && | |
| 454 bignum_fits_long_p (XRATIO_DENOMINATOR (number)) && | |
| 455 bignum_to_long (XRATIO_DENOMINATOR (number)) == 1L) | |
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456 number = Fcanonicalize_number (make_bignum_bg (XRATIO_NUMERATOR (number))); |
| 1983 | 457 #endif |
| 458 #ifdef HAVE_BIGNUM | |
| 3391 | 459 if (BIGNUMP (number) && bignum_fits_emacs_int_p (XBIGNUM_DATA (number))) |
| 1983 | 460 { |
| 3391 | 461 EMACS_INT n = bignum_to_emacs_int (XBIGNUM_DATA (number)); |
| 1983 | 462 if (NUMBER_FITS_IN_AN_EMACS_INT (n)) |
| 463 number = make_int (n); | |
| 464 } | |
| 465 #endif | |
| 466 return number; | |
| 467 } | |
| 468 | |
| 469 enum number_type | |
| 470 get_number_type (Lisp_Object arg) | |
| 471 { | |
| 472 if (INTP (arg)) | |
| 473 return FIXNUM_T; | |
| 474 #ifdef HAVE_BIGNUM | |
| 475 if (BIGNUMP (arg)) | |
| 476 return BIGNUM_T; | |
| 477 #endif | |
| 478 #ifdef HAVE_RATIO | |
| 479 if (RATIOP (arg)) | |
| 480 return RATIO_T; | |
| 481 #endif | |
| 482 if (FLOATP (arg)) | |
| 483 return FLOAT_T; | |
| 484 #ifdef HAVE_BIGFLOAT | |
| 485 if (BIGFLOATP (arg)) | |
| 486 return BIGFLOAT_T; | |
| 487 #endif | |
| 488 /* Catch unintentional bad uses of this function */ | |
| 2500 | 489 ABORT (); |
| 1995 | 490 /* NOTREACHED */ |
| 491 return FIXNUM_T; | |
| 1983 | 492 } |
| 493 | |
| 494 /* Convert NUMBER to type TYPE. If TYPE is BIGFLOAT_T then use the indicated | |
| 495 PRECISION; otherwise, PRECISION is ignored. */ | |
| 496 static Lisp_Object | |
| 497 internal_coerce_number (Lisp_Object number, enum number_type type, | |
| 2286 | 498 #ifdef HAVE_BIGFLOAT |
| 499 unsigned long precision | |
| 500 #else | |
| 501 unsigned long UNUSED (precision) | |
| 502 #endif | |
| 503 ) | |
| 1983 | 504 { |
| 505 enum number_type current_type; | |
| 506 | |
| 507 if (CHARP (number)) | |
| 508 number = make_int (XCHAR (number)); | |
| 509 else if (MARKERP (number)) | |
| 510 number = make_int (marker_position (number)); | |
| 511 | |
| 512 /* Note that CHECK_NUMBER ensures that NUMBER is a supported type. Hence, | |
| 2500 | 513 we ABORT() in the #else sections below, because it shouldn't be possible |
| 1983 | 514 to arrive there. */ |
| 515 CHECK_NUMBER (number); | |
| 516 current_type = get_number_type (number); | |
| 517 switch (current_type) | |
| 518 { | |
| 519 case FIXNUM_T: | |
| 520 switch (type) | |
| 521 { | |
| 522 case FIXNUM_T: | |
| 523 return number; | |
| 524 case BIGNUM_T: | |
| 525 #ifdef HAVE_BIGNUM | |
| 526 return make_bignum (XREALINT (number)); | |
| 527 #else | |
| 2500 | 528 ABORT (); |
| 1983 | 529 #endif /* HAVE_BIGNUM */ |
| 530 case RATIO_T: | |
| 531 #ifdef HAVE_RATIO | |
| 532 return make_ratio (XREALINT (number), 1UL); | |
| 533 #else | |
| 2500 | 534 ABORT (); |
| 1983 | 535 #endif /* HAVE_RATIO */ |
| 536 case FLOAT_T: | |
| 537 return make_float (XREALINT (number)); | |
| 538 case BIGFLOAT_T: | |
| 539 #ifdef HAVE_BIGFLOAT | |
| 540 return make_bigfloat (XREALINT (number), precision); | |
| 541 #else | |
| 2500 | 542 ABORT (); |
| 1983 | 543 #endif /* HAVE_BIGFLOAT */ |
| 544 } | |
| 545 case BIGNUM_T: | |
| 546 #ifdef HAVE_BIGNUM | |
| 547 switch (type) | |
| 548 { | |
| 549 case FIXNUM_T: | |
| 550 return make_int (bignum_to_long (XBIGNUM_DATA (number))); | |
| 551 case BIGNUM_T: | |
| 552 return number; | |
| 553 case RATIO_T: | |
| 554 #ifdef HAVE_RATIO | |
| 555 bignum_set_long (scratch_bignum, 1L); | |
| 556 return make_ratio_bg (XBIGNUM_DATA (number), scratch_bignum); | |
| 557 #else | |
| 2500 | 558 ABORT (); |
| 1983 | 559 #endif /* HAVE_RATIO */ |
| 560 case FLOAT_T: | |
| 561 return make_float (bignum_to_double (XBIGNUM_DATA (number))); | |
| 562 case BIGFLOAT_T: | |
| 563 #ifdef HAVE_BIGFLOAT | |
| 564 { | |
| 565 Lisp_Object temp; | |
| 566 temp = make_bigfloat (0.0, precision); | |
| 567 bigfloat_set_bignum (XBIGFLOAT_DATA (temp), XBIGNUM_DATA (number)); | |
| 568 return temp; | |
| 569 } | |
| 570 #else | |
| 2500 | 571 ABORT (); |
| 1983 | 572 #endif /* HAVE_BIGFLOAT */ |
| 573 } | |
| 574 #else | |
| 2500 | 575 ABORT (); |
| 1983 | 576 #endif /* HAVE_BIGNUM */ |
| 577 case RATIO_T: | |
| 578 #ifdef HAVE_RATIO | |
| 579 switch (type) | |
| 580 { | |
| 581 case FIXNUM_T: | |
| 582 bignum_div (scratch_bignum, XRATIO_NUMERATOR (number), | |
| 583 XRATIO_DENOMINATOR (number)); | |
| 584 return make_int (bignum_to_long (scratch_bignum)); | |
| 585 case BIGNUM_T: | |
| 586 bignum_div (scratch_bignum, XRATIO_NUMERATOR (number), | |
| 587 XRATIO_DENOMINATOR (number)); | |
| 588 return make_bignum_bg (scratch_bignum); | |
| 589 case RATIO_T: | |
| 590 return number; | |
| 591 case FLOAT_T: | |
| 592 return make_float (ratio_to_double (XRATIO_DATA (number))); | |
| 593 case BIGFLOAT_T: | |
| 594 #ifdef HAVE_BIGFLOAT | |
| 595 { | |
| 596 Lisp_Object temp; | |
| 597 temp = make_bigfloat (0.0, precision); | |
| 598 bigfloat_set_ratio (XBIGFLOAT_DATA (temp), XRATIO_DATA (number)); | |
| 599 return temp; | |
| 600 } | |
| 601 #else | |
| 2500 | 602 ABORT (); |
| 1983 | 603 #endif /* HAVE_BIGFLOAT */ |
| 604 } | |
| 605 #else | |
| 2500 | 606 ABORT (); |
| 1983 | 607 #endif /* HAVE_RATIO */ |
| 608 case FLOAT_T: | |
| 609 switch (type) | |
| 610 { | |
| 611 case FIXNUM_T: | |
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612 return Ftruncate (number, Qnil); |
| 1983 | 613 case BIGNUM_T: |
| 614 #ifdef HAVE_BIGNUM | |
| 615 bignum_set_double (scratch_bignum, XFLOAT_DATA (number)); | |
| 616 return make_bignum_bg (scratch_bignum); | |
| 617 #else | |
| 2500 | 618 ABORT (); |
| 1983 | 619 #endif /* HAVE_BIGNUM */ |
| 620 case RATIO_T: | |
| 621 #ifdef HAVE_RATIO | |
| 622 ratio_set_double (scratch_ratio, XFLOAT_DATA (number)); | |
| 623 return make_ratio_rt (scratch_ratio); | |
| 624 #else | |
| 2500 | 625 ABORT (); |
| 1983 | 626 #endif /* HAVE_RATIO */ |
| 627 case FLOAT_T: | |
| 628 return number; | |
| 629 case BIGFLOAT_T: | |
| 630 #ifdef HAVE_BIGFLOAT | |
| 631 bigfloat_set_prec (scratch_bigfloat, precision); | |
| 632 bigfloat_set_double (scratch_bigfloat, XFLOAT_DATA (number)); | |
| 633 return make_bigfloat_bf (scratch_bigfloat); | |
| 634 #else | |
| 2500 | 635 ABORT (); |
| 1983 | 636 #endif /* HAVE_BIGFLOAT */ |
| 637 } | |
| 638 case BIGFLOAT_T: | |
| 639 #ifdef HAVE_BIGFLOAT | |
| 640 switch (type) | |
| 641 { | |
| 642 case FIXNUM_T: | |
| 643 return make_int (bigfloat_to_long (XBIGFLOAT_DATA (number))); | |
| 644 case BIGNUM_T: | |
| 645 #ifdef HAVE_BIGNUM | |
| 646 bignum_set_bigfloat (scratch_bignum, XBIGFLOAT_DATA (number)); | |
| 647 return make_bignum_bg (scratch_bignum); | |
| 648 #else | |
| 2500 | 649 ABORT (); |
| 1983 | 650 #endif /* HAVE_BIGNUM */ |
| 651 case RATIO_T: | |
| 652 #ifdef HAVE_RATIO | |
| 653 ratio_set_bigfloat (scratch_ratio, XBIGFLOAT_DATA (number)); | |
| 654 return make_ratio_rt (scratch_ratio); | |
| 655 #else | |
| 2500 | 656 ABORT (); |
| 1983 | 657 #endif |
| 658 case FLOAT_T: | |
| 659 return make_float (bigfloat_to_double (XBIGFLOAT_DATA (number))); | |
| 660 case BIGFLOAT_T: | |
| 661 /* FIXME: Do we need to change the precision? */ | |
| 662 return number; | |
| 663 } | |
| 664 #else | |
| 2500 | 665 ABORT (); |
| 1983 | 666 #endif /* HAVE_BIGFLOAT */ |
| 667 } | |
| 2500 | 668 ABORT (); |
| 1995 | 669 /* NOTREACHED */ |
| 670 return Qzero; | |
| 1983 | 671 } |
| 672 | |
| 673 /* This function promotes its arguments as necessary to make them both the | |
| 674 same type. It destructively modifies its arguments to do so. Characters | |
| 675 and markers are ALWAYS converted to integers. */ | |
| 676 enum number_type | |
| 677 promote_args (Lisp_Object *arg1, Lisp_Object *arg2) | |
| 678 { | |
| 679 enum number_type type1, type2; | |
| 680 | |
| 681 if (CHARP (*arg1)) | |
| 682 *arg1 = make_int (XCHAR (*arg1)); | |
| 683 else if (MARKERP (*arg1)) | |
| 684 *arg1 = make_int (marker_position (*arg1)); | |
| 685 if (CHARP (*arg2)) | |
| 686 *arg2 = make_int (XCHAR (*arg2)); | |
| 687 else if (MARKERP (*arg2)) | |
| 688 *arg2 = make_int (marker_position (*arg2)); | |
| 689 | |
| 690 CHECK_NUMBER (*arg1); | |
| 691 CHECK_NUMBER (*arg2); | |
| 692 | |
| 693 type1 = get_number_type (*arg1); | |
| 694 type2 = get_number_type (*arg2); | |
| 695 | |
| 696 if (type1 < type2) | |
| 697 { | |
| 698 *arg1 = internal_coerce_number (*arg1, type2, | |
| 699 #ifdef HAVE_BIGFLOAT | |
| 700 type2 == BIGFLOAT_T | |
| 701 ? XBIGFLOAT_GET_PREC (*arg2) : | |
| 702 #endif | |
| 703 0UL); | |
| 704 return type2; | |
| 705 } | |
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706 |
| 1983 | 707 if (type2 < type1) |
| 708 { | |
| 709 *arg2 = internal_coerce_number (*arg2, type1, | |
| 710 #ifdef HAVE_BIGFLOAT | |
| 711 type1 == BIGFLOAT_T | |
| 712 ? XBIGFLOAT_GET_PREC (*arg1) : | |
| 713 #endif | |
| 714 0UL); | |
| 715 return type1; | |
| 716 } | |
| 717 | |
| 718 /* No conversion necessary */ | |
| 719 return type1; | |
| 720 } | |
| 721 | |
| 722 DEFUN ("coerce-number", Fcoerce_number, 2, 3, 0, /* | |
| 723 Convert NUMBER to the indicated type, possibly losing information. | |
| 724 Do not call this function. Use `coerce' instead. | |
| 725 | |
| 3025 | 726 TYPE is one of the symbols `fixnum', `integer', `ratio', `float', or |
| 727 `bigfloat'. Not all of these types may be supported. | |
| 1983 | 728 |
| 729 PRECISION is the number of bits of precision to use when converting to | |
| 730 bigfloat; it is ignored otherwise. If nil, the default precision is used. | |
| 731 | |
| 732 Note that some conversions lose information. No error is signaled in such | |
| 733 cases; the information is silently lost. | |
| 734 */ | |
| 2595 | 735 (number, type, USED_IF_BIGFLOAT (precision))) |
| 1983 | 736 { |
| 737 CHECK_SYMBOL (type); | |
| 738 if (EQ (type, Qfixnum)) | |
| 739 return internal_coerce_number (number, FIXNUM_T, 0UL); | |
| 740 else if (EQ (type, Qinteger)) | |
| 741 { | |
| 742 /* If bignums are available, we always convert to one first, then | |
| 743 downgrade to a fixnum if possible. */ | |
| 744 #ifdef HAVE_BIGNUM | |
| 745 return Fcanonicalize_number | |
| 746 (internal_coerce_number (number, BIGNUM_T, 0UL)); | |
| 747 #else | |
| 748 return internal_coerce_number (number, FIXNUM_T, 0UL); | |
| 749 #endif | |
| 750 } | |
| 751 #ifdef HAVE_RATIO | |
| 752 else if (EQ (type, Qratio)) | |
| 753 return internal_coerce_number (number, RATIO_T, 0UL); | |
| 754 #endif | |
| 755 else if (EQ (type, Qfloat)) | |
| 756 return internal_coerce_number (number, FLOAT_T, 0UL); | |
| 757 #ifdef HAVE_BIGFLOAT | |
| 758 else if (EQ (type, Qbigfloat)) | |
| 759 { | |
| 760 unsigned long prec; | |
| 761 | |
| 762 if (NILP (precision)) | |
| 763 prec = bigfloat_get_default_prec (); | |
| 764 else | |
| 765 { | |
| 766 CHECK_INTEGER (precision); | |
| 767 #ifdef HAVE_BIGNUM | |
| 768 if (INTP (precision)) | |
| 769 #endif /* HAVE_BIGNUM */ | |
| 770 prec = (unsigned long) XREALINT (precision); | |
| 771 #ifdef HAVE_BIGNUM | |
| 772 else | |
| 773 { | |
| 774 if (!bignum_fits_ulong_p (XBIGNUM_DATA (precision))) | |
| 775 args_out_of_range (precision, Vbigfloat_max_prec); | |
| 776 prec = bignum_to_ulong (XBIGNUM_DATA (precision)); | |
| 777 } | |
| 778 #endif /* HAVE_BIGNUM */ | |
| 779 } | |
| 780 return internal_coerce_number (number, BIGFLOAT_T, prec); | |
| 781 } | |
| 782 #endif /* HAVE_BIGFLOAT */ | |
| 783 | |
| 784 Fsignal (Qunsupported_type, type); | |
| 785 /* NOTREACHED */ | |
| 786 return Qnil; | |
| 787 } | |
| 788 | |
| 789 | |
| 790 void | |
| 791 syms_of_number (void) | |
| 792 { | |
| 793 #ifdef HAVE_BIGNUM | |
| 794 INIT_LRECORD_IMPLEMENTATION (bignum); | |
| 795 #endif | |
| 796 #ifdef HAVE_RATIO | |
| 797 INIT_LRECORD_IMPLEMENTATION (ratio); | |
| 798 #endif | |
| 799 #ifdef HAVE_BIGFLOAT | |
| 800 INIT_LRECORD_IMPLEMENTATION (bigfloat); | |
| 801 #endif | |
| 802 | |
| 803 /* Type predicates */ | |
| 804 DEFSYMBOL (Qrationalp); | |
| 805 DEFSYMBOL (Qfloatingp); | |
| 806 DEFSYMBOL (Qrealp); | |
| 807 DEFSYMBOL (Qbignump); | |
| 808 DEFSYMBOL (Qratiop); | |
| 809 DEFSYMBOL (Qbigfloatp); | |
| 810 | |
| 811 /* Functions */ | |
| 812 DEFSUBR (Fbignump); | |
| 813 DEFSUBR (Fintegerp); | |
| 814 DEFSUBR (Fevenp); | |
| 815 DEFSUBR (Foddp); | |
| 816 DEFSUBR (Fratiop); | |
| 817 DEFSUBR (Frationalp); | |
| 818 DEFSUBR (Fnumerator); | |
| 819 DEFSUBR (Fdenominator); | |
| 820 DEFSUBR (Fbigfloatp); | |
| 2092 | 821 DEFSUBR (Fbigfloat_get_precision); |
| 822 DEFSUBR (Fbigfloat_set_precision); | |
| 2001 | 823 DEFSUBR (Ffloatingp); |
| 1983 | 824 DEFSUBR (Frealp); |
| 825 DEFSUBR (Fcanonicalize_number); | |
| 826 DEFSUBR (Fcoerce_number); | |
| 827 | |
| 828 /* Errors */ | |
| 829 DEFERROR_STANDARD (Qunsupported_type, Qwrong_type_argument); | |
| 830 } | |
| 831 | |
| 832 void | |
| 833 vars_of_number (void) | |
| 834 { | |
| 2051 | 835 /* These variables are Lisp variables rather than number variables so that |
| 836 we can put bignums in them. */ | |
| 1983 | 837 DEFVAR_LISP_MAGIC ("default-float-precision", &Vdefault_float_precision, /* |
| 838 The default floating-point precision for newly created floating point values. | |
| 2092 | 839 This should be 0 to create Lisp float types, or an unsigned integer no greater |
| 840 than `bigfloat-maximum-precision' to create Lisp bigfloat types with the | |
| 841 indicated precision. | |
| 1983 | 842 */ default_float_precision_changed); |
| 843 Vdefault_float_precision = make_int (0); | |
| 844 | |
| 2092 | 845 DEFVAR_CONST_LISP ("bigfloat-maximum-precision", &Vbigfloat_max_prec /* |
| 1983 | 846 The maximum number of bits of precision a bigfloat can have. |
| 2092 | 847 This is determined by the underlying library used to implement bigfloats. |
| 1983 | 848 */); |
| 849 | |
| 2061 | 850 #ifdef HAVE_BIGFLOAT |
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851 /* Don't create a bignum here. Otherwise, we lose with NEW_GC + pdump. |
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852 See reinit_vars_of_number(). */ |
| 2061 | 853 Vbigfloat_max_prec = make_int (EMACS_INT_MAX); |
| 854 #else | |
| 2051 | 855 Vbigfloat_max_prec = make_int (0); |
| 856 #endif /* HAVE_BIGFLOAT */ | |
| 857 | |
| 1983 | 858 DEFVAR_CONST_INT ("most-negative-fixnum", &Vmost_negative_fixnum /* |
| 859 The fixnum closest in value to negative infinity. | |
| 860 */); | |
| 861 Vmost_negative_fixnum = EMACS_INT_MIN; | |
| 862 | |
| 863 DEFVAR_CONST_INT ("most-positive-fixnum", &Vmost_positive_fixnum /* | |
| 864 The fixnum closest in value to positive infinity. | |
| 865 */); | |
| 866 Vmost_positive_fixnum = EMACS_INT_MAX; | |
| 867 | |
| 868 Fprovide (intern ("number-types")); | |
| 869 #ifdef HAVE_BIGNUM | |
| 870 Fprovide (intern ("bignum")); | |
| 871 #endif | |
| 872 #ifdef HAVE_RATIO | |
| 873 Fprovide (intern ("ratio")); | |
| 874 #endif | |
| 875 #ifdef HAVE_BIGFLOAT | |
| 876 Fprovide (intern ("bigfloat")); | |
| 877 #endif | |
| 878 } | |
| 879 | |
| 880 void | |
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881 reinit_vars_of_number (void) |
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882 { |
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883 #if defined(HAVE_BIGFLOAT) && defined(HAVE_BIGNUM) |
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884 Vbigfloat_max_prec = make_bignum (0L); |
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885 bignum_set_ulong (XBIGNUM_DATA (Vbigfloat_max_prec), ULONG_MAX); |
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886 #endif |
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887 } |
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888 |
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889 void |
| 1983 | 890 init_number (void) |
| 891 { | |
| 892 if (!number_initialized) | |
| 893 { | |
| 894 number_initialized = 1; | |
| 895 | |
| 896 #ifdef WITH_GMP | |
| 897 init_number_gmp (); | |
| 898 #endif | |
| 899 #ifdef WITH_MP | |
| 900 init_number_mp (); | |
| 901 #endif | |
| 902 | |
| 903 #ifdef HAVE_BIGNUM | |
| 904 bignum_init (scratch_bignum); | |
| 905 bignum_init (scratch_bignum2); | |
| 906 #endif | |
| 907 | |
| 908 #ifdef HAVE_RATIO | |
| 909 ratio_init (scratch_ratio); | |
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910 ratio_init (scratch_ratio2); |
| 1983 | 911 #endif |
| 912 | |
| 913 #ifdef HAVE_BIGFLOAT | |
| 914 bigfloat_init (scratch_bigfloat); | |
| 915 bigfloat_init (scratch_bigfloat2); | |
| 916 #endif | |
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917 |
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918 #ifndef PDUMP |
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919 reinit_vars_of_number (); |
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920 #endif |
| 1983 | 921 } |
| 922 } |