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annotate src/number.c @ 5030:422b4b4fb2a6
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| author | Vin Shelton <acs@xemacs.org> |
|---|---|
| date | Thu, 11 Feb 2010 19:33:50 -0500 |
| parents | 16112448d484 |
| children | b5df3737028a |
| 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; |
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35 |
| 1983 | 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 { |
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56 Ascbyte *bstr = bignum_to_string (XBIGNUM_DATA (obj), 10); |
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57 write_ascstring (printcharfun, bstr); |
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58 xfree (bstr); |
| 1983 | 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 |
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77 bignum_equal (Lisp_Object obj1, Lisp_Object obj2, int UNUSED (depth), |
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78 int UNUSED (foldcase)) |
| 1983 | 79 { |
| 80 return bignum_eql (XBIGNUM_DATA (obj1), XBIGNUM_DATA (obj2)); | |
| 81 } | |
| 82 | |
| 83 static Hashcode | |
| 2286 | 84 bignum_hash (Lisp_Object obj, int UNUSED (depth)) |
| 1983 | 85 { |
| 86 return bignum_hashcode (XBIGNUM_DATA (obj)); | |
| 87 } | |
| 88 | |
| 2551 | 89 static void |
| 90 bignum_convert (const void *object, void **data, Bytecount *size) | |
| 91 { | |
| 92 CIbyte *bstr = bignum_to_string (*(bignum *)object, 10); | |
| 93 *data = bstr; | |
| 94 *size = strlen(bstr)+1; | |
| 95 } | |
| 96 | |
| 97 static void | |
| 98 bignum_convfree (const void * UNUSED (object), void *data, | |
| 99 Bytecount UNUSED (size)) | |
| 100 { | |
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101 xfree (data); |
| 2551 | 102 } |
| 103 | |
| 104 static void * | |
| 105 bignum_deconvert (void *object, void *data, Bytecount UNUSED (size)) | |
| 106 { | |
| 107 bignum *b = (bignum *) object; | |
| 108 bignum_init(*b); | |
| 109 bignum_set_string(*b, (const char *) data, 10); | |
| 110 return object; | |
| 111 } | |
| 112 | |
| 113 static const struct opaque_convert_functions bignum_opc = { | |
| 114 bignum_convert, | |
| 115 bignum_convfree, | |
| 116 bignum_deconvert | |
| 117 }; | |
| 118 | |
| 1983 | 119 static const struct memory_description bignum_description[] = { |
| 2551 | 120 { XD_OPAQUE_DATA_CONVERTIBLE, offsetof (Lisp_Bignum, data), |
| 121 0, { &bignum_opc }, XD_FLAG_NO_KKCC }, | |
| 1983 | 122 { XD_END } |
| 123 }; | |
| 124 | |
| 2551 | 125 DEFINE_BASIC_LRECORD_IMPLEMENTATION ("bignum", bignum, 1, 0, bignum_print, |
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126 BIGNUM_FINALIZE, bignum_equal, |
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127 bignum_hash, bignum_description, |
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128 Lisp_Bignum); |
| 1983 | 129 |
| 2092 | 130 #endif /* HAVE_BIGNUM */ |
| 1983 | 131 |
| 132 Lisp_Object Qbignump; | |
| 133 | |
| 134 DEFUN ("bignump", Fbignump, 1, 1, 0, /* | |
| 135 Return t if OBJECT is a bignum, nil otherwise. | |
| 136 */ | |
| 137 (object)) | |
| 138 { | |
| 139 return BIGNUMP (object) ? Qt : Qnil; | |
| 140 } | |
| 141 | |
| 142 | |
| 143 /********************************** Ratios **********************************/ | |
| 144 #ifdef HAVE_RATIO | |
| 145 static void | |
| 2286 | 146 ratio_print (Lisp_Object obj, Lisp_Object printcharfun, |
| 147 int UNUSED (escapeflag)) | |
| 1983 | 148 { |
| 149 CIbyte *rstr = ratio_to_string (XRATIO_DATA (obj), 10); | |
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150 write_ascstring (printcharfun, rstr); |
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151 xfree (rstr); |
| 1983 | 152 } |
| 153 | |
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154 #ifdef NEW_GC |
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155 static void |
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156 ratio_finalize (void *header, int for_disksave) |
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157 { |
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158 if (!for_disksave) |
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159 { |
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160 struct Lisp_Ratio *num = (struct Lisp_Ratio *) header; |
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161 ratio_fini (num->data); |
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162 } |
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163 } |
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164 #define RATIO_FINALIZE ratio_finalize |
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165 #else |
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166 #define RATIO_FINALIZE 0 |
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167 #endif |
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168 |
| 1983 | 169 static int |
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170 ratio_equal (Lisp_Object obj1, Lisp_Object obj2, int UNUSED (depth), |
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171 int UNUSED (foldcase)) |
| 1983 | 172 { |
| 173 return ratio_eql (XRATIO_DATA (obj1), XRATIO_DATA (obj2)); | |
| 174 } | |
| 175 | |
| 176 static Hashcode | |
| 2286 | 177 ratio_hash (Lisp_Object obj, int UNUSED (depth)) |
| 1983 | 178 { |
| 179 return ratio_hashcode (XRATIO_DATA (obj)); | |
| 180 } | |
| 181 | |
| 182 static const struct memory_description ratio_description[] = { | |
| 183 { XD_OPAQUE_PTR, offsetof (Lisp_Ratio, data) }, | |
| 184 { XD_END } | |
| 185 }; | |
| 186 | |
| 2061 | 187 DEFINE_BASIC_LRECORD_IMPLEMENTATION ("ratio", ratio, 0, 0, ratio_print, |
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188 RATIO_FINALIZE, ratio_equal, ratio_hash, |
| 2061 | 189 ratio_description, Lisp_Ratio); |
| 1983 | 190 |
| 2092 | 191 #endif /* HAVE_RATIO */ |
| 1983 | 192 |
| 193 Lisp_Object Qratiop; | |
| 194 | |
| 195 DEFUN ("ratiop", Fratiop, 1, 1, 0, /* | |
| 196 Return t if OBJECT is a ratio, nil otherwise. | |
| 197 */ | |
| 198 (object)) | |
| 199 { | |
| 200 return RATIOP (object) ? Qt : Qnil; | |
| 201 } | |
| 202 | |
| 203 | |
| 204 /******************************** Rationals *********************************/ | |
| 205 DEFUN ("rationalp", Frationalp, 1, 1, 0, /* | |
| 206 Return t if OBJECT is a rational, nil otherwise. | |
| 207 */ | |
| 208 (object)) | |
| 209 { | |
| 210 return RATIONALP (object) ? Qt : Qnil; | |
| 211 } | |
| 212 | |
| 213 DEFUN ("numerator", Fnumerator, 1, 1, 0, /* | |
| 214 Return the numerator of the canonical form of RATIONAL. | |
| 215 If RATIONAL is an integer, RATIONAL is returned. | |
| 216 */ | |
| 217 (rational)) | |
| 218 { | |
| 219 CONCHECK_RATIONAL (rational); | |
| 220 #ifdef HAVE_RATIO | |
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221 if (RATIOP (rational)) |
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222 { |
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223 return |
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224 Fcanonicalize_number (make_bignum_bg (XRATIO_NUMERATOR (rational))); |
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225 } |
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226 #endif |
| 1983 | 227 return rational; |
| 228 } | |
| 229 | |
| 230 DEFUN ("denominator", Fdenominator, 1, 1, 0, /* | |
| 231 Return the denominator of the canonical form of RATIONAL. | |
| 232 If RATIONAL is an integer, 1 is returned. | |
| 233 */ | |
| 234 (rational)) | |
| 235 { | |
| 236 CONCHECK_RATIONAL (rational); | |
| 237 #ifdef HAVE_RATIO | |
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238 if (RATIOP (rational)) |
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239 { |
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240 return Fcanonicalize_number (make_bignum_bg |
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241 (XRATIO_DENOMINATOR (rational))); |
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242 } |
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243 #endif |
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244 return make_int (1); |
| 1983 | 245 } |
| 246 | |
| 247 | |
| 248 /******************************** Bigfloats *********************************/ | |
| 249 #ifdef HAVE_BIGFLOAT | |
| 250 static void | |
| 2286 | 251 bigfloat_print (Lisp_Object obj, Lisp_Object printcharfun, |
| 252 int UNUSED (escapeflag)) | |
| 1983 | 253 { |
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254 Ascbyte *fstr = bigfloat_to_string (XBIGFLOAT_DATA (obj), 10); |
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255 write_ascstring (printcharfun, fstr); |
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256 xfree (fstr); |
| 1983 | 257 } |
| 258 | |
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259 #ifdef NEW_GC |
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260 static void |
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261 bigfloat_finalize (void *header, int for_disksave) |
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262 { |
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263 if (!for_disksave) |
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264 { |
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265 struct Lisp_Bigfloat *num = (struct Lisp_Bigfloat *) header; |
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266 bigfloat_fini (num->bf); |
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267 } |
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268 } |
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269 #define BIGFLOAT_FINALIZE bigfloat_finalize |
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270 #else |
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271 #define BIGFLOAT_FINALIZE 0 |
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272 #endif |
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273 |
| 1983 | 274 static int |
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275 bigfloat_equal (Lisp_Object obj1, Lisp_Object obj2, int UNUSED (depth), |
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276 int UNUSED (foldcase)) |
| 1983 | 277 { |
| 278 return bigfloat_eql (XBIGFLOAT_DATA (obj1), XBIGFLOAT_DATA (obj2)); | |
| 279 } | |
| 280 | |
| 281 static Hashcode | |
| 2286 | 282 bigfloat_hash (Lisp_Object obj, int UNUSED (depth)) |
| 1983 | 283 { |
| 284 return bigfloat_hashcode (XBIGFLOAT_DATA (obj)); | |
| 285 } | |
| 286 | |
| 287 static const struct memory_description bigfloat_description[] = { | |
| 288 { XD_OPAQUE_PTR, offsetof (Lisp_Bigfloat, bf) }, | |
| 289 { XD_END } | |
| 290 }; | |
| 291 | |
| 2061 | 292 DEFINE_BASIC_LRECORD_IMPLEMENTATION ("bigfloat", bigfloat, 1, 0, |
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293 bigfloat_print, BIGFLOAT_FINALIZE, |
| 2061 | 294 bigfloat_equal, bigfloat_hash, |
| 295 bigfloat_description, Lisp_Bigfloat); | |
| 1983 | 296 |
| 2092 | 297 #endif /* HAVE_BIGFLOAT */ |
| 1983 | 298 |
| 299 Lisp_Object Qbigfloatp; | |
| 300 | |
| 301 DEFUN ("bigfloatp", Fbigfloatp, 1, 1, 0, /* | |
| 302 Return t if OBJECT is a bigfloat, nil otherwise. | |
| 303 */ | |
| 304 (object)) | |
| 305 { | |
| 306 return BIGFLOATP (object) ? Qt : Qnil; | |
| 307 } | |
| 308 | |
| 2092 | 309 DEFUN ("bigfloat-get-precision", Fbigfloat_get_precision, 1, 1, 0, /* |
| 310 Return the precision of bigfloat F as an integer. | |
| 311 */ | |
| 312 (f)) | |
| 313 { | |
| 314 CHECK_BIGFLOAT (f); | |
| 315 #ifdef HAVE_BIGNUM | |
| 316 bignum_set_ulong (scratch_bignum, XBIGFLOAT_GET_PREC (f)); | |
| 317 return Fcanonicalize_number (make_bignum_bg (scratch_bignum)); | |
| 318 #else | |
| 319 return make_int ((int) XBIGFLOAT_GET_PREC (f)); | |
| 320 #endif | |
| 321 } | |
| 322 | |
| 323 DEFUN ("bigfloat-set-precision", Fbigfloat_set_precision, 2, 2, 0, /* | |
| 324 Set the precision of F, a bigfloat, to PRECISION, a nonnegative integer. | |
| 325 The new precision of F is returned. Note that the return value may differ | |
| 326 from PRECISION if the underlying library is unable to support exactly | |
| 327 PRECISION bits of precision. | |
| 328 */ | |
| 329 (f, precision)) | |
| 330 { | |
| 331 unsigned long prec; | |
| 332 | |
| 333 CHECK_BIGFLOAT (f); | |
| 334 if (INTP (precision)) | |
| 335 { | |
| 336 prec = (XINT (precision) <= 0) ? 1UL : (unsigned long) XINT (precision); | |
| 337 } | |
| 338 #ifdef HAVE_BIGNUM | |
| 339 else if (BIGNUMP (precision)) | |
| 340 { | |
| 341 prec = bignum_fits_ulong_p (XBIGNUM_DATA (precision)) | |
| 342 ? bignum_to_ulong (XBIGNUM_DATA (precision)) | |
| 343 : UINT_MAX; | |
| 344 } | |
| 345 #endif | |
| 346 else | |
| 347 { | |
| 348 dead_wrong_type_argument (Qintegerp, f); | |
| 349 return Qnil; | |
| 350 } | |
| 351 | |
| 352 XBIGFLOAT_SET_PREC (f, prec); | |
| 353 return Fbigfloat_get_precision (f); | |
| 354 } | |
| 355 | |
| 1983 | 356 static int |
| 2286 | 357 default_float_precision_changed (Lisp_Object UNUSED (sym), Lisp_Object *val, |
| 358 Lisp_Object UNUSED (in_object), | |
| 359 int UNUSED (flags)) | |
| 1983 | 360 { |
| 361 unsigned long prec; | |
| 362 | |
| 363 CONCHECK_INTEGER (*val); | |
| 364 #ifdef HAVE_BIGFLOAT | |
| 365 if (INTP (*val)) | |
| 366 prec = XINT (*val); | |
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367 else |
| 1983 | 368 { |
| 369 if (!bignum_fits_ulong_p (XBIGNUM_DATA (*val))) | |
| 370 args_out_of_range_3 (*val, Qzero, Vbigfloat_max_prec); | |
| 371 prec = bignum_to_ulong (XBIGNUM_DATA (*val)); | |
| 372 } | |
| 373 if (prec != 0UL) | |
| 374 bigfloat_set_default_prec (prec); | |
| 375 #endif | |
| 376 return 0; | |
| 377 } | |
| 378 | |
| 379 | |
| 380 /********************************* Floating *********************************/ | |
| 381 Lisp_Object | |
| 382 make_floating (double d) | |
| 383 { | |
| 384 #ifdef HAVE_BIGFLOAT | |
| 385 if (ZEROP (Vdefault_float_precision)) | |
| 386 #endif | |
| 387 return make_float (d); | |
| 388 #ifdef HAVE_BIGFLOAT | |
| 389 else | |
| 390 return make_bigfloat (d, 0UL); | |
| 391 #endif | |
| 392 } | |
| 393 | |
| 394 DEFUN ("floatingp", Ffloatingp, 1, 1, 0, /* | |
| 395 Return t if OBJECT is a floating point number of any kind, nil otherwise. | |
| 396 */ | |
| 397 (object)) | |
| 398 { | |
| 399 return FLOATINGP (object) ? Qt : Qnil; | |
| 400 } | |
| 401 | |
| 402 | |
| 403 /********************************** Reals ***********************************/ | |
| 404 DEFUN ("realp", Frealp, 1, 1, 0, /* | |
| 405 Return t if OBJECT is a real, nil otherwise. | |
| 406 */ | |
| 407 (object)) | |
| 408 { | |
| 409 return REALP (object) ? Qt : Qnil; | |
| 410 } | |
| 411 | |
| 412 | |
| 413 /********************************* Numbers **********************************/ | |
| 414 DEFUN ("canonicalize-number", Fcanonicalize_number, 1, 1, 0, /* | |
| 415 Return the canonical form of NUMBER. | |
| 416 */ | |
| 417 (number)) | |
| 418 { | |
| 419 /* The tests should go in order from larger, more expressive, or more | |
| 420 complex types to smaller, less expressive, or simpler types so that a | |
| 421 number can cascade all the way down to the simplest type if | |
| 422 appropriate. */ | |
| 423 #ifdef HAVE_RATIO | |
| 424 if (RATIOP (number) && | |
| 425 bignum_fits_long_p (XRATIO_DENOMINATOR (number)) && | |
| 426 bignum_to_long (XRATIO_DENOMINATOR (number)) == 1L) | |
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427 number = Fcanonicalize_number (make_bignum_bg (XRATIO_NUMERATOR (number))); |
| 1983 | 428 #endif |
| 429 #ifdef HAVE_BIGNUM | |
| 3391 | 430 if (BIGNUMP (number) && bignum_fits_emacs_int_p (XBIGNUM_DATA (number))) |
| 1983 | 431 { |
| 3391 | 432 EMACS_INT n = bignum_to_emacs_int (XBIGNUM_DATA (number)); |
| 1983 | 433 if (NUMBER_FITS_IN_AN_EMACS_INT (n)) |
| 434 number = make_int (n); | |
| 435 } | |
| 436 #endif | |
| 437 return number; | |
| 438 } | |
| 439 | |
| 440 enum number_type | |
| 441 get_number_type (Lisp_Object arg) | |
| 442 { | |
| 443 if (INTP (arg)) | |
| 444 return FIXNUM_T; | |
| 445 #ifdef HAVE_BIGNUM | |
| 446 if (BIGNUMP (arg)) | |
| 447 return BIGNUM_T; | |
| 448 #endif | |
| 449 #ifdef HAVE_RATIO | |
| 450 if (RATIOP (arg)) | |
| 451 return RATIO_T; | |
| 452 #endif | |
| 453 if (FLOATP (arg)) | |
| 454 return FLOAT_T; | |
| 455 #ifdef HAVE_BIGFLOAT | |
| 456 if (BIGFLOATP (arg)) | |
| 457 return BIGFLOAT_T; | |
| 458 #endif | |
| 459 /* Catch unintentional bad uses of this function */ | |
| 2500 | 460 ABORT (); |
| 1995 | 461 /* NOTREACHED */ |
| 462 return FIXNUM_T; | |
| 1983 | 463 } |
| 464 | |
| 465 /* Convert NUMBER to type TYPE. If TYPE is BIGFLOAT_T then use the indicated | |
| 466 PRECISION; otherwise, PRECISION is ignored. */ | |
| 467 static Lisp_Object | |
| 468 internal_coerce_number (Lisp_Object number, enum number_type type, | |
| 2286 | 469 #ifdef HAVE_BIGFLOAT |
| 470 unsigned long precision | |
| 471 #else | |
| 472 unsigned long UNUSED (precision) | |
| 473 #endif | |
| 474 ) | |
| 1983 | 475 { |
| 476 enum number_type current_type; | |
| 477 | |
| 478 if (CHARP (number)) | |
| 479 number = make_int (XCHAR (number)); | |
| 480 else if (MARKERP (number)) | |
| 481 number = make_int (marker_position (number)); | |
| 482 | |
| 483 /* Note that CHECK_NUMBER ensures that NUMBER is a supported type. Hence, | |
| 2500 | 484 we ABORT() in the #else sections below, because it shouldn't be possible |
| 1983 | 485 to arrive there. */ |
| 486 CHECK_NUMBER (number); | |
| 487 current_type = get_number_type (number); | |
| 488 switch (current_type) | |
| 489 { | |
| 490 case FIXNUM_T: | |
| 491 switch (type) | |
| 492 { | |
| 493 case FIXNUM_T: | |
| 494 return number; | |
| 495 case BIGNUM_T: | |
| 496 #ifdef HAVE_BIGNUM | |
| 497 return make_bignum (XREALINT (number)); | |
| 498 #else | |
| 2500 | 499 ABORT (); |
| 1983 | 500 #endif /* HAVE_BIGNUM */ |
| 501 case RATIO_T: | |
| 502 #ifdef HAVE_RATIO | |
| 503 return make_ratio (XREALINT (number), 1UL); | |
| 504 #else | |
| 2500 | 505 ABORT (); |
| 1983 | 506 #endif /* HAVE_RATIO */ |
| 507 case FLOAT_T: | |
| 508 return make_float (XREALINT (number)); | |
| 509 case BIGFLOAT_T: | |
| 510 #ifdef HAVE_BIGFLOAT | |
| 511 return make_bigfloat (XREALINT (number), precision); | |
| 512 #else | |
| 2500 | 513 ABORT (); |
| 1983 | 514 #endif /* HAVE_BIGFLOAT */ |
| 515 } | |
| 516 case BIGNUM_T: | |
| 517 #ifdef HAVE_BIGNUM | |
| 518 switch (type) | |
| 519 { | |
| 520 case FIXNUM_T: | |
| 521 return make_int (bignum_to_long (XBIGNUM_DATA (number))); | |
| 522 case BIGNUM_T: | |
| 523 return number; | |
| 524 case RATIO_T: | |
| 525 #ifdef HAVE_RATIO | |
| 526 bignum_set_long (scratch_bignum, 1L); | |
| 527 return make_ratio_bg (XBIGNUM_DATA (number), scratch_bignum); | |
| 528 #else | |
| 2500 | 529 ABORT (); |
| 1983 | 530 #endif /* HAVE_RATIO */ |
| 531 case FLOAT_T: | |
| 532 return make_float (bignum_to_double (XBIGNUM_DATA (number))); | |
| 533 case BIGFLOAT_T: | |
| 534 #ifdef HAVE_BIGFLOAT | |
| 535 { | |
| 536 Lisp_Object temp; | |
| 537 temp = make_bigfloat (0.0, precision); | |
| 538 bigfloat_set_bignum (XBIGFLOAT_DATA (temp), XBIGNUM_DATA (number)); | |
| 539 return temp; | |
| 540 } | |
| 541 #else | |
| 2500 | 542 ABORT (); |
| 1983 | 543 #endif /* HAVE_BIGFLOAT */ |
| 544 } | |
| 545 #else | |
| 2500 | 546 ABORT (); |
| 1983 | 547 #endif /* HAVE_BIGNUM */ |
| 548 case RATIO_T: | |
| 549 #ifdef HAVE_RATIO | |
| 550 switch (type) | |
| 551 { | |
| 552 case FIXNUM_T: | |
| 553 bignum_div (scratch_bignum, XRATIO_NUMERATOR (number), | |
| 554 XRATIO_DENOMINATOR (number)); | |
| 555 return make_int (bignum_to_long (scratch_bignum)); | |
| 556 case BIGNUM_T: | |
| 557 bignum_div (scratch_bignum, XRATIO_NUMERATOR (number), | |
| 558 XRATIO_DENOMINATOR (number)); | |
| 559 return make_bignum_bg (scratch_bignum); | |
| 560 case RATIO_T: | |
| 561 return number; | |
| 562 case FLOAT_T: | |
| 563 return make_float (ratio_to_double (XRATIO_DATA (number))); | |
| 564 case BIGFLOAT_T: | |
| 565 #ifdef HAVE_BIGFLOAT | |
| 566 { | |
| 567 Lisp_Object temp; | |
| 568 temp = make_bigfloat (0.0, precision); | |
| 569 bigfloat_set_ratio (XBIGFLOAT_DATA (temp), XRATIO_DATA (number)); | |
| 570 return temp; | |
| 571 } | |
| 572 #else | |
| 2500 | 573 ABORT (); |
| 1983 | 574 #endif /* HAVE_BIGFLOAT */ |
| 575 } | |
| 576 #else | |
| 2500 | 577 ABORT (); |
| 1983 | 578 #endif /* HAVE_RATIO */ |
| 579 case FLOAT_T: | |
| 580 switch (type) | |
| 581 { | |
| 582 case FIXNUM_T: | |
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583 return Ftruncate (number, Qnil); |
| 1983 | 584 case BIGNUM_T: |
| 585 #ifdef HAVE_BIGNUM | |
| 586 bignum_set_double (scratch_bignum, XFLOAT_DATA (number)); | |
| 587 return make_bignum_bg (scratch_bignum); | |
| 588 #else | |
| 2500 | 589 ABORT (); |
| 1983 | 590 #endif /* HAVE_BIGNUM */ |
| 591 case RATIO_T: | |
| 592 #ifdef HAVE_RATIO | |
| 593 ratio_set_double (scratch_ratio, XFLOAT_DATA (number)); | |
| 594 return make_ratio_rt (scratch_ratio); | |
| 595 #else | |
| 2500 | 596 ABORT (); |
| 1983 | 597 #endif /* HAVE_RATIO */ |
| 598 case FLOAT_T: | |
| 599 return number; | |
| 600 case BIGFLOAT_T: | |
| 601 #ifdef HAVE_BIGFLOAT | |
| 602 bigfloat_set_prec (scratch_bigfloat, precision); | |
| 603 bigfloat_set_double (scratch_bigfloat, XFLOAT_DATA (number)); | |
| 604 return make_bigfloat_bf (scratch_bigfloat); | |
| 605 #else | |
| 2500 | 606 ABORT (); |
| 1983 | 607 #endif /* HAVE_BIGFLOAT */ |
| 608 } | |
| 609 case BIGFLOAT_T: | |
| 610 #ifdef HAVE_BIGFLOAT | |
| 611 switch (type) | |
| 612 { | |
| 613 case FIXNUM_T: | |
| 614 return make_int (bigfloat_to_long (XBIGFLOAT_DATA (number))); | |
| 615 case BIGNUM_T: | |
| 616 #ifdef HAVE_BIGNUM | |
| 617 bignum_set_bigfloat (scratch_bignum, XBIGFLOAT_DATA (number)); | |
| 618 return make_bignum_bg (scratch_bignum); | |
| 619 #else | |
| 2500 | 620 ABORT (); |
| 1983 | 621 #endif /* HAVE_BIGNUM */ |
| 622 case RATIO_T: | |
| 623 #ifdef HAVE_RATIO | |
| 624 ratio_set_bigfloat (scratch_ratio, XBIGFLOAT_DATA (number)); | |
| 625 return make_ratio_rt (scratch_ratio); | |
| 626 #else | |
| 2500 | 627 ABORT (); |
| 1983 | 628 #endif |
| 629 case FLOAT_T: | |
| 630 return make_float (bigfloat_to_double (XBIGFLOAT_DATA (number))); | |
| 631 case BIGFLOAT_T: | |
| 632 /* FIXME: Do we need to change the precision? */ | |
| 633 return number; | |
| 634 } | |
| 635 #else | |
| 2500 | 636 ABORT (); |
| 1983 | 637 #endif /* HAVE_BIGFLOAT */ |
| 638 } | |
| 2500 | 639 ABORT (); |
| 1995 | 640 /* NOTREACHED */ |
| 641 return Qzero; | |
| 1983 | 642 } |
| 643 | |
| 644 /* This function promotes its arguments as necessary to make them both the | |
| 645 same type. It destructively modifies its arguments to do so. Characters | |
| 646 and markers are ALWAYS converted to integers. */ | |
| 647 enum number_type | |
| 648 promote_args (Lisp_Object *arg1, Lisp_Object *arg2) | |
| 649 { | |
| 650 enum number_type type1, type2; | |
| 651 | |
| 652 if (CHARP (*arg1)) | |
| 653 *arg1 = make_int (XCHAR (*arg1)); | |
| 654 else if (MARKERP (*arg1)) | |
| 655 *arg1 = make_int (marker_position (*arg1)); | |
| 656 if (CHARP (*arg2)) | |
| 657 *arg2 = make_int (XCHAR (*arg2)); | |
| 658 else if (MARKERP (*arg2)) | |
| 659 *arg2 = make_int (marker_position (*arg2)); | |
| 660 | |
| 661 CHECK_NUMBER (*arg1); | |
| 662 CHECK_NUMBER (*arg2); | |
| 663 | |
| 664 type1 = get_number_type (*arg1); | |
| 665 type2 = get_number_type (*arg2); | |
| 666 | |
| 667 if (type1 < type2) | |
| 668 { | |
| 669 *arg1 = internal_coerce_number (*arg1, type2, | |
| 670 #ifdef HAVE_BIGFLOAT | |
| 671 type2 == BIGFLOAT_T | |
| 672 ? XBIGFLOAT_GET_PREC (*arg2) : | |
| 673 #endif | |
| 674 0UL); | |
| 675 return type2; | |
| 676 } | |
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677 |
| 1983 | 678 if (type2 < type1) |
| 679 { | |
| 680 *arg2 = internal_coerce_number (*arg2, type1, | |
| 681 #ifdef HAVE_BIGFLOAT | |
| 682 type1 == BIGFLOAT_T | |
| 683 ? XBIGFLOAT_GET_PREC (*arg1) : | |
| 684 #endif | |
| 685 0UL); | |
| 686 return type1; | |
| 687 } | |
| 688 | |
| 689 /* No conversion necessary */ | |
| 690 return type1; | |
| 691 } | |
| 692 | |
| 693 DEFUN ("coerce-number", Fcoerce_number, 2, 3, 0, /* | |
| 694 Convert NUMBER to the indicated type, possibly losing information. | |
| 695 Do not call this function. Use `coerce' instead. | |
| 696 | |
| 3025 | 697 TYPE is one of the symbols `fixnum', `integer', `ratio', `float', or |
| 698 `bigfloat'. Not all of these types may be supported. | |
| 1983 | 699 |
| 700 PRECISION is the number of bits of precision to use when converting to | |
| 701 bigfloat; it is ignored otherwise. If nil, the default precision is used. | |
| 702 | |
| 703 Note that some conversions lose information. No error is signaled in such | |
| 704 cases; the information is silently lost. | |
| 705 */ | |
| 2595 | 706 (number, type, USED_IF_BIGFLOAT (precision))) |
| 1983 | 707 { |
| 708 CHECK_SYMBOL (type); | |
| 709 if (EQ (type, Qfixnum)) | |
| 710 return internal_coerce_number (number, FIXNUM_T, 0UL); | |
| 711 else if (EQ (type, Qinteger)) | |
| 712 { | |
| 713 /* If bignums are available, we always convert to one first, then | |
| 714 downgrade to a fixnum if possible. */ | |
| 715 #ifdef HAVE_BIGNUM | |
| 716 return Fcanonicalize_number | |
| 717 (internal_coerce_number (number, BIGNUM_T, 0UL)); | |
| 718 #else | |
| 719 return internal_coerce_number (number, FIXNUM_T, 0UL); | |
| 720 #endif | |
| 721 } | |
| 722 #ifdef HAVE_RATIO | |
| 723 else if (EQ (type, Qratio)) | |
| 724 return internal_coerce_number (number, RATIO_T, 0UL); | |
| 725 #endif | |
| 726 else if (EQ (type, Qfloat)) | |
| 727 return internal_coerce_number (number, FLOAT_T, 0UL); | |
| 728 #ifdef HAVE_BIGFLOAT | |
| 729 else if (EQ (type, Qbigfloat)) | |
| 730 { | |
| 731 unsigned long prec; | |
| 732 | |
| 733 if (NILP (precision)) | |
| 734 prec = bigfloat_get_default_prec (); | |
| 735 else | |
| 736 { | |
| 737 CHECK_INTEGER (precision); | |
| 738 #ifdef HAVE_BIGNUM | |
| 739 if (INTP (precision)) | |
| 740 #endif /* HAVE_BIGNUM */ | |
| 741 prec = (unsigned long) XREALINT (precision); | |
| 742 #ifdef HAVE_BIGNUM | |
| 743 else | |
| 744 { | |
| 745 if (!bignum_fits_ulong_p (XBIGNUM_DATA (precision))) | |
| 746 args_out_of_range (precision, Vbigfloat_max_prec); | |
| 747 prec = bignum_to_ulong (XBIGNUM_DATA (precision)); | |
| 748 } | |
| 749 #endif /* HAVE_BIGNUM */ | |
| 750 } | |
| 751 return internal_coerce_number (number, BIGFLOAT_T, prec); | |
| 752 } | |
| 753 #endif /* HAVE_BIGFLOAT */ | |
| 754 | |
| 755 Fsignal (Qunsupported_type, type); | |
| 756 /* NOTREACHED */ | |
| 757 return Qnil; | |
| 758 } | |
| 759 | |
| 760 | |
| 761 void | |
| 762 syms_of_number (void) | |
| 763 { | |
| 764 #ifdef HAVE_BIGNUM | |
| 765 INIT_LRECORD_IMPLEMENTATION (bignum); | |
| 766 #endif | |
| 767 #ifdef HAVE_RATIO | |
| 768 INIT_LRECORD_IMPLEMENTATION (ratio); | |
| 769 #endif | |
| 770 #ifdef HAVE_BIGFLOAT | |
| 771 INIT_LRECORD_IMPLEMENTATION (bigfloat); | |
| 772 #endif | |
| 773 | |
| 774 /* Type predicates */ | |
| 775 DEFSYMBOL (Qrationalp); | |
| 776 DEFSYMBOL (Qfloatingp); | |
| 777 DEFSYMBOL (Qrealp); | |
| 778 DEFSYMBOL (Qbignump); | |
| 779 DEFSYMBOL (Qratiop); | |
| 780 DEFSYMBOL (Qbigfloatp); | |
| 781 | |
| 782 /* Functions */ | |
| 783 DEFSUBR (Fbignump); | |
| 784 DEFSUBR (Fratiop); | |
| 785 DEFSUBR (Frationalp); | |
| 786 DEFSUBR (Fnumerator); | |
| 787 DEFSUBR (Fdenominator); | |
| 788 DEFSUBR (Fbigfloatp); | |
| 2092 | 789 DEFSUBR (Fbigfloat_get_precision); |
| 790 DEFSUBR (Fbigfloat_set_precision); | |
| 2001 | 791 DEFSUBR (Ffloatingp); |
| 1983 | 792 DEFSUBR (Frealp); |
| 793 DEFSUBR (Fcanonicalize_number); | |
| 794 DEFSUBR (Fcoerce_number); | |
| 795 | |
| 796 /* Errors */ | |
| 797 DEFERROR_STANDARD (Qunsupported_type, Qwrong_type_argument); | |
| 798 } | |
| 799 | |
| 800 void | |
| 801 vars_of_number (void) | |
| 802 { | |
| 2051 | 803 /* These variables are Lisp variables rather than number variables so that |
| 804 we can put bignums in them. */ | |
| 1983 | 805 DEFVAR_LISP_MAGIC ("default-float-precision", &Vdefault_float_precision, /* |
| 806 The default floating-point precision for newly created floating point values. | |
| 2092 | 807 This should be 0 to create Lisp float types, or an unsigned integer no greater |
| 808 than `bigfloat-maximum-precision' to create Lisp bigfloat types with the | |
| 809 indicated precision. | |
| 1983 | 810 */ default_float_precision_changed); |
| 811 Vdefault_float_precision = make_int (0); | |
| 812 | |
| 2092 | 813 DEFVAR_CONST_LISP ("bigfloat-maximum-precision", &Vbigfloat_max_prec /* |
| 1983 | 814 The maximum number of bits of precision a bigfloat can have. |
| 2092 | 815 This is determined by the underlying library used to implement bigfloats. |
| 1983 | 816 */); |
| 817 | |
| 2061 | 818 #ifdef HAVE_BIGFLOAT |
|
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819 /* Don't create a bignum here. Otherwise, we lose with NEW_GC + pdump. |
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820 See reinit_vars_of_number(). */ |
| 2061 | 821 Vbigfloat_max_prec = make_int (EMACS_INT_MAX); |
| 822 #else | |
| 2051 | 823 Vbigfloat_max_prec = make_int (0); |
| 824 #endif /* HAVE_BIGFLOAT */ | |
| 825 | |
| 1983 | 826 Fprovide (intern ("number-types")); |
| 827 #ifdef HAVE_BIGNUM | |
| 828 Fprovide (intern ("bignum")); | |
| 829 #endif | |
| 830 #ifdef HAVE_RATIO | |
| 831 Fprovide (intern ("ratio")); | |
| 832 #endif | |
| 833 #ifdef HAVE_BIGFLOAT | |
| 834 Fprovide (intern ("bigfloat")); | |
| 835 #endif | |
| 836 } | |
| 837 | |
| 838 void | |
|
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839 reinit_vars_of_number (void) |
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840 { |
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841 #if defined(HAVE_BIGFLOAT) && defined(HAVE_BIGNUM) |
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842 Vbigfloat_max_prec = make_bignum (0L); |
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843 bignum_set_ulong (XBIGNUM_DATA (Vbigfloat_max_prec), ULONG_MAX); |
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844 #endif |
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845 } |
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846 |
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847 void |
| 1983 | 848 init_number (void) |
| 849 { | |
| 850 if (!number_initialized) | |
| 851 { | |
| 852 number_initialized = 1; | |
| 853 | |
| 854 #ifdef WITH_GMP | |
| 855 init_number_gmp (); | |
| 856 #endif | |
| 857 #ifdef WITH_MP | |
| 858 init_number_mp (); | |
| 859 #endif | |
| 860 | |
| 861 #ifdef HAVE_BIGNUM | |
| 862 bignum_init (scratch_bignum); | |
| 863 bignum_init (scratch_bignum2); | |
| 864 #endif | |
| 865 | |
| 866 #ifdef HAVE_RATIO | |
| 867 ratio_init (scratch_ratio); | |
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868 ratio_init (scratch_ratio2); |
| 1983 | 869 #endif |
| 870 | |
| 871 #ifdef HAVE_BIGFLOAT | |
| 872 bigfloat_init (scratch_bigfloat); | |
| 873 bigfloat_init (scratch_bigfloat2); | |
| 874 #endif | |
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875 |
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876 #ifndef PDUMP |
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877 reinit_vars_of_number (); |
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878 #endif |
| 1983 | 879 } |
| 880 } |