Mercurial > hg > xemacs-beta
annotate src/number.c @ 5554:a42e686a01bf
Automated merge with file:///Sources/xemacs-21.5-checked-out
| author | Aidan Kehoe <kehoea@parhasard.net> |
|---|---|
| date | Wed, 24 Aug 2011 11:07:26 +0100 |
| parents | 2aa9cd456ae7 |
| children | 56144c8593a8 |
| 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 | |
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7 XEmacs is free software: you can redistribute it and/or modify it |
| 1983 | 8 under the terms of the GNU General Public License as published by the |
|
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9 Free Software Foundation, either version 3 of the License, or (at your |
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10 option) any later version. |
| 1983 | 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 | |
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18 along with XEmacs. If not, see <http://www.gnu.org/licenses/>. */ |
| 1983 | 19 |
| 20 /* Synched up with: Not in FSF. */ | |
| 21 | |
| 22 #include <config.h> | |
| 23 #include <limits.h> | |
| 24 #include "lisp.h" | |
| 25 | |
| 2595 | 26 #ifdef HAVE_BIGFLOAT |
| 27 #define USED_IF_BIGFLOAT(decl) decl | |
| 28 #else | |
| 29 #define USED_IF_BIGFLOAT(decl) UNUSED (decl) | |
| 30 #endif | |
| 31 | |
| 2001 | 32 Lisp_Object Qrationalp, Qfloatingp, Qrealp; |
| 1983 | 33 Lisp_Object Vdefault_float_precision; |
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34 |
| 1983 | 35 static Lisp_Object Qunsupported_type; |
| 36 static Lisp_Object Vbigfloat_max_prec; | |
| 37 static int number_initialized; | |
| 38 | |
| 39 #ifdef HAVE_BIGNUM | |
| 40 bignum scratch_bignum, scratch_bignum2; | |
| 41 #endif | |
| 42 #ifdef HAVE_RATIO | |
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43 ratio scratch_ratio, scratch_ratio2; |
| 1983 | 44 #endif |
| 45 #ifdef HAVE_BIGFLOAT | |
| 46 bigfloat scratch_bigfloat, scratch_bigfloat2; | |
| 47 #endif | |
| 48 | |
| 49 /********************************* Bignums **********************************/ | |
| 50 #ifdef HAVE_BIGNUM | |
| 51 static void | |
| 2286 | 52 bignum_print (Lisp_Object obj, Lisp_Object printcharfun, |
| 53 int UNUSED (escapeflag)) | |
| 1983 | 54 { |
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55 Ascbyte *bstr = bignum_to_string (XBIGNUM_DATA (obj), 10); |
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56 write_ascstring (printcharfun, bstr); |
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57 xfree (bstr); |
| 1983 | 58 } |
| 59 | |
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60 #ifdef NEW_GC |
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61 static void |
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62 bignum_finalize (Lisp_Object obj) |
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63 { |
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64 struct Lisp_Bignum *num = XBIGNUM (obj); |
| 5125 | 65 /* #### WARNING: It would be better to put some sort of check to make |
| 66 sure this doesn't happen more than once, just in case --- | |
| 67 e.g. checking if it's zero before finalizing and then setting it to | |
| 68 zero after finalizing. */ | |
| 69 bignum_fini (num->data); | |
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70 } |
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71 #endif |
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72 |
| 1983 | 73 static int |
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74 bignum_equal (Lisp_Object obj1, Lisp_Object obj2, int UNUSED (depth), |
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75 int UNUSED (foldcase)) |
| 1983 | 76 { |
| 77 return bignum_eql (XBIGNUM_DATA (obj1), XBIGNUM_DATA (obj2)); | |
| 78 } | |
| 79 | |
| 80 static Hashcode | |
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81 bignum_hash (Lisp_Object obj, int UNUSED (depth), Boolint equalp) |
| 1983 | 82 { |
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83 if (equalp) |
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84 { |
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85 return FLOAT_HASHCODE_FROM_DOUBLE (bignum_to_double (XBIGNUM_DATA (obj))); |
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86 } |
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87 else |
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88 { |
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89 return bignum_hashcode (XBIGNUM_DATA (obj)); |
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90 } |
| 1983 | 91 } |
| 92 | |
| 2551 | 93 static void |
| 94 bignum_convert (const void *object, void **data, Bytecount *size) | |
| 95 { | |
| 96 CIbyte *bstr = bignum_to_string (*(bignum *)object, 10); | |
| 97 *data = bstr; | |
| 98 *size = strlen(bstr)+1; | |
| 99 } | |
| 100 | |
| 101 static void | |
| 102 bignum_convfree (const void * UNUSED (object), void *data, | |
| 103 Bytecount UNUSED (size)) | |
| 104 { | |
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105 xfree (data); |
| 2551 | 106 } |
| 107 | |
| 108 static void * | |
| 109 bignum_deconvert (void *object, void *data, Bytecount UNUSED (size)) | |
| 110 { | |
| 111 bignum *b = (bignum *) object; | |
| 112 bignum_init(*b); | |
| 113 bignum_set_string(*b, (const char *) data, 10); | |
| 114 return object; | |
| 115 } | |
| 116 | |
| 117 static const struct opaque_convert_functions bignum_opc = { | |
| 118 bignum_convert, | |
| 119 bignum_convfree, | |
| 120 bignum_deconvert | |
| 121 }; | |
| 122 | |
| 1983 | 123 static const struct memory_description bignum_description[] = { |
| 2551 | 124 { XD_OPAQUE_DATA_CONVERTIBLE, offsetof (Lisp_Bignum, data), |
| 125 0, { &bignum_opc }, XD_FLAG_NO_KKCC }, | |
| 1983 | 126 { XD_END } |
| 127 }; | |
| 128 | |
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129 DEFINE_DUMPABLE_FROB_BLOCK_LISP_OBJECT ("bignum", bignum, 0, bignum_print, |
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130 IF_NEW_GC (bignum_finalize), |
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131 bignum_equal, bignum_hash, |
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132 bignum_description, Lisp_Bignum); |
| 2092 | 133 #endif /* HAVE_BIGNUM */ |
| 1983 | 134 |
| 135 Lisp_Object Qbignump; | |
| 136 | |
| 137 DEFUN ("bignump", Fbignump, 1, 1, 0, /* | |
| 138 Return t if OBJECT is a bignum, nil otherwise. | |
| 139 */ | |
| 140 (object)) | |
| 141 { | |
| 142 return BIGNUMP (object) ? Qt : Qnil; | |
| 143 } | |
| 144 | |
| 145 | |
| 146 /********************************** Ratios **********************************/ | |
| 147 #ifdef HAVE_RATIO | |
| 148 static void | |
| 2286 | 149 ratio_print (Lisp_Object obj, Lisp_Object printcharfun, |
| 150 int UNUSED (escapeflag)) | |
| 1983 | 151 { |
| 152 CIbyte *rstr = ratio_to_string (XRATIO_DATA (obj), 10); | |
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153 write_ascstring (printcharfun, rstr); |
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154 xfree (rstr); |
| 1983 | 155 } |
| 156 | |
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157 #ifdef NEW_GC |
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158 static void |
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159 ratio_finalize (Lisp_Object obj) |
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160 { |
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161 struct Lisp_Ratio *num = XRATIO (obj); |
| 5125 | 162 /* #### WARNING: It would be better to put some sort of check to make |
| 163 sure this doesn't happen more than once, just in case --- | |
| 164 e.g. checking if it's zero before finalizing and then setting it to | |
| 165 zero after finalizing. */ | |
| 166 ratio_fini (num->data); | |
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167 } |
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168 #endif /* not NEW_GC */ |
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169 |
| 1983 | 170 static int |
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171 ratio_equal (Lisp_Object obj1, Lisp_Object obj2, int UNUSED (depth), |
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172 int UNUSED (foldcase)) |
| 1983 | 173 { |
| 174 return ratio_eql (XRATIO_DATA (obj1), XRATIO_DATA (obj2)); | |
| 175 } | |
| 176 | |
| 177 static Hashcode | |
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178 ratio_hash (Lisp_Object obj, int UNUSED (depth), Boolint equalp) |
| 1983 | 179 { |
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180 if (equalp) |
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181 { |
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182 return FLOAT_HASHCODE_FROM_DOUBLE (ratio_to_double (XRATIO_DATA (obj))); |
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183 } |
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184 else |
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185 { |
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186 return ratio_hashcode (XRATIO_DATA (obj)); |
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187 } |
| 1983 | 188 } |
| 189 | |
| 190 static const struct memory_description ratio_description[] = { | |
| 191 { XD_OPAQUE_PTR, offsetof (Lisp_Ratio, data) }, | |
| 192 { XD_END } | |
| 193 }; | |
| 194 | |
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195 DEFINE_NODUMP_FROB_BLOCK_LISP_OBJECT ("ratio", ratio, 0, ratio_print, |
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196 IF_NEW_GC (ratio_finalize), |
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197 ratio_equal, ratio_hash, |
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198 ratio_description, Lisp_Ratio); |
| 1983 | 199 |
| 2092 | 200 #endif /* HAVE_RATIO */ |
| 1983 | 201 |
| 202 Lisp_Object Qratiop; | |
| 203 | |
| 204 DEFUN ("ratiop", Fratiop, 1, 1, 0, /* | |
| 205 Return t if OBJECT is a ratio, nil otherwise. | |
| 206 */ | |
| 207 (object)) | |
| 208 { | |
| 209 return RATIOP (object) ? Qt : Qnil; | |
| 210 } | |
| 211 | |
| 212 | |
| 213 /******************************** Rationals *********************************/ | |
| 214 DEFUN ("rationalp", Frationalp, 1, 1, 0, /* | |
| 215 Return t if OBJECT is a rational, nil otherwise. | |
| 216 */ | |
| 217 (object)) | |
| 218 { | |
| 219 return RATIONALP (object) ? Qt : Qnil; | |
| 220 } | |
| 221 | |
| 222 DEFUN ("numerator", Fnumerator, 1, 1, 0, /* | |
| 223 Return the numerator of the canonical form of RATIONAL. | |
| 224 If RATIONAL is an integer, RATIONAL is returned. | |
| 225 */ | |
| 226 (rational)) | |
| 227 { | |
| 228 CONCHECK_RATIONAL (rational); | |
| 229 #ifdef HAVE_RATIO | |
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230 if (RATIOP (rational)) |
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231 { |
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232 return |
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233 Fcanonicalize_number (make_bignum_bg (XRATIO_NUMERATOR (rational))); |
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234 } |
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235 #endif |
| 1983 | 236 return rational; |
| 237 } | |
| 238 | |
| 239 DEFUN ("denominator", Fdenominator, 1, 1, 0, /* | |
| 240 Return the denominator of the canonical form of RATIONAL. | |
| 241 If RATIONAL is an integer, 1 is returned. | |
| 242 */ | |
| 243 (rational)) | |
| 244 { | |
| 245 CONCHECK_RATIONAL (rational); | |
| 246 #ifdef HAVE_RATIO | |
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247 if (RATIOP (rational)) |
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248 { |
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249 return Fcanonicalize_number (make_bignum_bg |
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250 (XRATIO_DENOMINATOR (rational))); |
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251 } |
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252 #endif |
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253 return make_int (1); |
| 1983 | 254 } |
| 255 | |
| 256 | |
| 257 /******************************** Bigfloats *********************************/ | |
| 258 #ifdef HAVE_BIGFLOAT | |
| 259 static void | |
| 2286 | 260 bigfloat_print (Lisp_Object obj, Lisp_Object printcharfun, |
| 261 int UNUSED (escapeflag)) | |
| 1983 | 262 { |
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263 Ascbyte *fstr = bigfloat_to_string (XBIGFLOAT_DATA (obj), 10); |
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264 write_ascstring (printcharfun, fstr); |
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265 xfree (fstr); |
| 1983 | 266 } |
| 267 | |
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268 #ifdef NEW_GC |
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269 static void |
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270 bigfloat_finalize (Lisp_Object obj) |
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271 { |
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272 struct Lisp_Bigfloat *num = XBIGFLOAT (obj); |
| 5125 | 273 /* #### WARNING: It would be better to put some sort of check to make |
| 274 sure this doesn't happen more than once, just in case --- | |
| 275 e.g. checking if it's zero before finalizing and then setting it to | |
| 276 zero after finalizing. */ | |
| 277 bigfloat_fini (num->bf); | |
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278 } |
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279 #endif /* not NEW_GC */ |
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280 |
| 1983 | 281 static int |
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282 bigfloat_equal (Lisp_Object obj1, Lisp_Object obj2, int UNUSED (depth), |
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283 int UNUSED (foldcase)) |
| 1983 | 284 { |
| 285 return bigfloat_eql (XBIGFLOAT_DATA (obj1), XBIGFLOAT_DATA (obj2)); | |
| 286 } | |
| 287 | |
| 288 static Hashcode | |
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289 bigfloat_hash (Lisp_Object obj, int UNUSED (depth), Boolint equalp) |
| 1983 | 290 { |
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291 if (equalp) |
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292 { |
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293 return |
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294 FLOAT_HASHCODE_FROM_DOUBLE (bigfloat_to_double (XBIGFLOAT_DATA (obj))); |
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295 } |
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296 else |
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297 { |
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298 return bigfloat_hashcode (XBIGFLOAT_DATA (obj)); |
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299 } |
| 1983 | 300 } |
| 301 | |
| 302 static const struct memory_description bigfloat_description[] = { | |
| 303 { XD_OPAQUE_PTR, offsetof (Lisp_Bigfloat, bf) }, | |
| 304 { XD_END } | |
| 305 }; | |
| 306 | |
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307 DEFINE_DUMPABLE_FROB_BLOCK_LISP_OBJECT ("bigfloat", bigfloat, 0, |
|
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308 bigfloat_print, |
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309 IF_NEW_GC (bigfloat_finalize), |
|
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310 bigfloat_equal, bigfloat_hash, |
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311 bigfloat_description, Lisp_Bigfloat); |
| 1983 | 312 |
| 2092 | 313 #endif /* HAVE_BIGFLOAT */ |
| 1983 | 314 |
| 315 Lisp_Object Qbigfloatp; | |
| 316 | |
| 317 DEFUN ("bigfloatp", Fbigfloatp, 1, 1, 0, /* | |
| 318 Return t if OBJECT is a bigfloat, nil otherwise. | |
| 319 */ | |
| 320 (object)) | |
| 321 { | |
| 322 return BIGFLOATP (object) ? Qt : Qnil; | |
| 323 } | |
| 324 | |
| 2092 | 325 DEFUN ("bigfloat-get-precision", Fbigfloat_get_precision, 1, 1, 0, /* |
| 326 Return the precision of bigfloat F as an integer. | |
| 327 */ | |
| 328 (f)) | |
| 329 { | |
| 330 CHECK_BIGFLOAT (f); | |
| 331 #ifdef HAVE_BIGNUM | |
| 332 bignum_set_ulong (scratch_bignum, XBIGFLOAT_GET_PREC (f)); | |
| 333 return Fcanonicalize_number (make_bignum_bg (scratch_bignum)); | |
| 334 #else | |
| 335 return make_int ((int) XBIGFLOAT_GET_PREC (f)); | |
| 336 #endif | |
| 337 } | |
| 338 | |
| 339 DEFUN ("bigfloat-set-precision", Fbigfloat_set_precision, 2, 2, 0, /* | |
| 340 Set the precision of F, a bigfloat, to PRECISION, a nonnegative integer. | |
| 341 The new precision of F is returned. Note that the return value may differ | |
| 342 from PRECISION if the underlying library is unable to support exactly | |
| 343 PRECISION bits of precision. | |
| 344 */ | |
| 345 (f, precision)) | |
| 346 { | |
| 347 unsigned long prec; | |
| 348 | |
| 349 CHECK_BIGFLOAT (f); | |
| 350 if (INTP (precision)) | |
| 351 { | |
| 352 prec = (XINT (precision) <= 0) ? 1UL : (unsigned long) XINT (precision); | |
| 353 } | |
| 354 #ifdef HAVE_BIGNUM | |
| 355 else if (BIGNUMP (precision)) | |
| 356 { | |
| 357 prec = bignum_fits_ulong_p (XBIGNUM_DATA (precision)) | |
| 358 ? bignum_to_ulong (XBIGNUM_DATA (precision)) | |
| 359 : UINT_MAX; | |
| 360 } | |
| 361 #endif | |
| 362 else | |
| 363 { | |
| 364 dead_wrong_type_argument (Qintegerp, f); | |
| 365 return Qnil; | |
| 366 } | |
| 367 | |
| 368 XBIGFLOAT_SET_PREC (f, prec); | |
| 369 return Fbigfloat_get_precision (f); | |
| 370 } | |
| 371 | |
| 1983 | 372 static int |
| 2286 | 373 default_float_precision_changed (Lisp_Object UNUSED (sym), Lisp_Object *val, |
| 374 Lisp_Object UNUSED (in_object), | |
| 375 int UNUSED (flags)) | |
| 1983 | 376 { |
| 377 unsigned long prec; | |
| 378 | |
| 379 CONCHECK_INTEGER (*val); | |
| 380 #ifdef HAVE_BIGFLOAT | |
| 381 if (INTP (*val)) | |
| 382 prec = XINT (*val); | |
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383 else |
| 1983 | 384 { |
| 385 if (!bignum_fits_ulong_p (XBIGNUM_DATA (*val))) | |
| 386 args_out_of_range_3 (*val, Qzero, Vbigfloat_max_prec); | |
| 387 prec = bignum_to_ulong (XBIGNUM_DATA (*val)); | |
| 388 } | |
| 389 if (prec != 0UL) | |
| 390 bigfloat_set_default_prec (prec); | |
| 391 #endif | |
| 392 return 0; | |
| 393 } | |
| 394 | |
| 395 | |
| 396 /********************************* Floating *********************************/ | |
| 397 Lisp_Object | |
| 398 make_floating (double d) | |
| 399 { | |
| 400 #ifdef HAVE_BIGFLOAT | |
| 401 if (ZEROP (Vdefault_float_precision)) | |
| 402 #endif | |
| 403 return make_float (d); | |
| 404 #ifdef HAVE_BIGFLOAT | |
| 405 else | |
| 406 return make_bigfloat (d, 0UL); | |
| 407 #endif | |
| 408 } | |
| 409 | |
| 410 DEFUN ("floatingp", Ffloatingp, 1, 1, 0, /* | |
| 411 Return t if OBJECT is a floating point number of any kind, nil otherwise. | |
| 412 */ | |
| 413 (object)) | |
| 414 { | |
| 415 return FLOATINGP (object) ? Qt : Qnil; | |
| 416 } | |
| 417 | |
| 418 | |
| 419 /********************************** Reals ***********************************/ | |
| 420 DEFUN ("realp", Frealp, 1, 1, 0, /* | |
| 421 Return t if OBJECT is a real, nil otherwise. | |
| 422 */ | |
| 423 (object)) | |
| 424 { | |
| 425 return REALP (object) ? Qt : Qnil; | |
| 426 } | |
| 427 | |
| 428 | |
| 429 /********************************* Numbers **********************************/ | |
| 430 DEFUN ("canonicalize-number", Fcanonicalize_number, 1, 1, 0, /* | |
| 431 Return the canonical form of NUMBER. | |
| 432 */ | |
| 433 (number)) | |
| 434 { | |
| 435 /* The tests should go in order from larger, more expressive, or more | |
| 436 complex types to smaller, less expressive, or simpler types so that a | |
| 437 number can cascade all the way down to the simplest type if | |
| 438 appropriate. */ | |
| 439 #ifdef HAVE_RATIO | |
| 440 if (RATIOP (number) && | |
| 441 bignum_fits_long_p (XRATIO_DENOMINATOR (number)) && | |
| 442 bignum_to_long (XRATIO_DENOMINATOR (number)) == 1L) | |
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443 number = Fcanonicalize_number (make_bignum_bg (XRATIO_NUMERATOR (number))); |
| 1983 | 444 #endif |
| 445 #ifdef HAVE_BIGNUM | |
| 3391 | 446 if (BIGNUMP (number) && bignum_fits_emacs_int_p (XBIGNUM_DATA (number))) |
| 1983 | 447 { |
| 3391 | 448 EMACS_INT n = bignum_to_emacs_int (XBIGNUM_DATA (number)); |
| 1983 | 449 if (NUMBER_FITS_IN_AN_EMACS_INT (n)) |
| 450 number = make_int (n); | |
| 451 } | |
| 452 #endif | |
| 453 return number; | |
| 454 } | |
| 455 | |
| 456 enum number_type | |
| 457 get_number_type (Lisp_Object arg) | |
| 458 { | |
| 459 if (INTP (arg)) | |
| 460 return FIXNUM_T; | |
| 461 #ifdef HAVE_BIGNUM | |
| 462 if (BIGNUMP (arg)) | |
| 463 return BIGNUM_T; | |
| 464 #endif | |
| 465 #ifdef HAVE_RATIO | |
| 466 if (RATIOP (arg)) | |
| 467 return RATIO_T; | |
| 468 #endif | |
| 469 if (FLOATP (arg)) | |
| 470 return FLOAT_T; | |
| 471 #ifdef HAVE_BIGFLOAT | |
| 472 if (BIGFLOATP (arg)) | |
| 473 return BIGFLOAT_T; | |
| 474 #endif | |
| 475 /* Catch unintentional bad uses of this function */ | |
| 2500 | 476 ABORT (); |
| 1995 | 477 /* NOTREACHED */ |
| 478 return FIXNUM_T; | |
| 1983 | 479 } |
| 480 | |
| 481 /* Convert NUMBER to type TYPE. If TYPE is BIGFLOAT_T then use the indicated | |
| 482 PRECISION; otherwise, PRECISION is ignored. */ | |
| 483 static Lisp_Object | |
| 484 internal_coerce_number (Lisp_Object number, enum number_type type, | |
| 2286 | 485 #ifdef HAVE_BIGFLOAT |
| 486 unsigned long precision | |
| 487 #else | |
| 488 unsigned long UNUSED (precision) | |
| 489 #endif | |
| 490 ) | |
| 1983 | 491 { |
| 492 enum number_type current_type; | |
| 493 | |
| 494 if (CHARP (number)) | |
| 495 number = make_int (XCHAR (number)); | |
| 496 else if (MARKERP (number)) | |
| 497 number = make_int (marker_position (number)); | |
| 498 | |
| 499 /* Note that CHECK_NUMBER ensures that NUMBER is a supported type. Hence, | |
| 2500 | 500 we ABORT() in the #else sections below, because it shouldn't be possible |
| 1983 | 501 to arrive there. */ |
| 502 CHECK_NUMBER (number); | |
| 503 current_type = get_number_type (number); | |
| 504 switch (current_type) | |
| 505 { | |
| 506 case FIXNUM_T: | |
| 507 switch (type) | |
| 508 { | |
| 509 case FIXNUM_T: | |
| 510 return number; | |
| 511 case BIGNUM_T: | |
| 512 #ifdef HAVE_BIGNUM | |
| 513 return make_bignum (XREALINT (number)); | |
| 514 #else | |
| 2500 | 515 ABORT (); |
| 1983 | 516 #endif /* HAVE_BIGNUM */ |
| 517 case RATIO_T: | |
| 518 #ifdef HAVE_RATIO | |
| 519 return make_ratio (XREALINT (number), 1UL); | |
| 520 #else | |
| 2500 | 521 ABORT (); |
| 1983 | 522 #endif /* HAVE_RATIO */ |
| 523 case FLOAT_T: | |
| 524 return make_float (XREALINT (number)); | |
| 525 case BIGFLOAT_T: | |
| 526 #ifdef HAVE_BIGFLOAT | |
| 527 return make_bigfloat (XREALINT (number), precision); | |
| 528 #else | |
| 2500 | 529 ABORT (); |
| 1983 | 530 #endif /* HAVE_BIGFLOAT */ |
| 531 } | |
| 532 case BIGNUM_T: | |
| 533 #ifdef HAVE_BIGNUM | |
| 534 switch (type) | |
| 535 { | |
| 536 case FIXNUM_T: | |
| 537 return make_int (bignum_to_long (XBIGNUM_DATA (number))); | |
| 538 case BIGNUM_T: | |
| 539 return number; | |
| 540 case RATIO_T: | |
| 541 #ifdef HAVE_RATIO | |
| 542 bignum_set_long (scratch_bignum, 1L); | |
| 543 return make_ratio_bg (XBIGNUM_DATA (number), scratch_bignum); | |
| 544 #else | |
| 2500 | 545 ABORT (); |
| 1983 | 546 #endif /* HAVE_RATIO */ |
| 547 case FLOAT_T: | |
| 548 return make_float (bignum_to_double (XBIGNUM_DATA (number))); | |
| 549 case BIGFLOAT_T: | |
| 550 #ifdef HAVE_BIGFLOAT | |
| 551 { | |
| 552 Lisp_Object temp; | |
| 553 temp = make_bigfloat (0.0, precision); | |
| 554 bigfloat_set_bignum (XBIGFLOAT_DATA (temp), XBIGNUM_DATA (number)); | |
| 555 return temp; | |
| 556 } | |
| 557 #else | |
| 2500 | 558 ABORT (); |
| 1983 | 559 #endif /* HAVE_BIGFLOAT */ |
| 560 } | |
| 561 #else | |
| 2500 | 562 ABORT (); |
| 1983 | 563 #endif /* HAVE_BIGNUM */ |
| 564 case RATIO_T: | |
| 565 #ifdef HAVE_RATIO | |
| 566 switch (type) | |
| 567 { | |
| 568 case FIXNUM_T: | |
| 569 bignum_div (scratch_bignum, XRATIO_NUMERATOR (number), | |
| 570 XRATIO_DENOMINATOR (number)); | |
| 571 return make_int (bignum_to_long (scratch_bignum)); | |
| 572 case BIGNUM_T: | |
| 573 bignum_div (scratch_bignum, XRATIO_NUMERATOR (number), | |
| 574 XRATIO_DENOMINATOR (number)); | |
| 575 return make_bignum_bg (scratch_bignum); | |
| 576 case RATIO_T: | |
| 577 return number; | |
| 578 case FLOAT_T: | |
| 579 return make_float (ratio_to_double (XRATIO_DATA (number))); | |
| 580 case BIGFLOAT_T: | |
| 581 #ifdef HAVE_BIGFLOAT | |
| 582 { | |
| 583 Lisp_Object temp; | |
| 584 temp = make_bigfloat (0.0, precision); | |
| 585 bigfloat_set_ratio (XBIGFLOAT_DATA (temp), XRATIO_DATA (number)); | |
| 586 return temp; | |
| 587 } | |
| 588 #else | |
| 2500 | 589 ABORT (); |
| 1983 | 590 #endif /* HAVE_BIGFLOAT */ |
| 591 } | |
| 592 #else | |
| 2500 | 593 ABORT (); |
| 1983 | 594 #endif /* HAVE_RATIO */ |
| 595 case FLOAT_T: | |
| 596 switch (type) | |
| 597 { | |
| 598 case FIXNUM_T: | |
|
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599 return Ftruncate (number, Qnil); |
| 1983 | 600 case BIGNUM_T: |
| 601 #ifdef HAVE_BIGNUM | |
| 602 bignum_set_double (scratch_bignum, XFLOAT_DATA (number)); | |
| 603 return make_bignum_bg (scratch_bignum); | |
| 604 #else | |
| 2500 | 605 ABORT (); |
| 1983 | 606 #endif /* HAVE_BIGNUM */ |
| 607 case RATIO_T: | |
| 608 #ifdef HAVE_RATIO | |
| 609 ratio_set_double (scratch_ratio, XFLOAT_DATA (number)); | |
| 610 return make_ratio_rt (scratch_ratio); | |
| 611 #else | |
| 2500 | 612 ABORT (); |
| 1983 | 613 #endif /* HAVE_RATIO */ |
| 614 case FLOAT_T: | |
| 615 return number; | |
| 616 case BIGFLOAT_T: | |
| 617 #ifdef HAVE_BIGFLOAT | |
| 618 bigfloat_set_prec (scratch_bigfloat, precision); | |
| 619 bigfloat_set_double (scratch_bigfloat, XFLOAT_DATA (number)); | |
| 620 return make_bigfloat_bf (scratch_bigfloat); | |
| 621 #else | |
| 2500 | 622 ABORT (); |
| 1983 | 623 #endif /* HAVE_BIGFLOAT */ |
| 624 } | |
| 625 case BIGFLOAT_T: | |
| 626 #ifdef HAVE_BIGFLOAT | |
| 627 switch (type) | |
| 628 { | |
| 629 case FIXNUM_T: | |
| 630 return make_int (bigfloat_to_long (XBIGFLOAT_DATA (number))); | |
| 631 case BIGNUM_T: | |
| 632 #ifdef HAVE_BIGNUM | |
| 633 bignum_set_bigfloat (scratch_bignum, XBIGFLOAT_DATA (number)); | |
| 634 return make_bignum_bg (scratch_bignum); | |
| 635 #else | |
| 2500 | 636 ABORT (); |
| 1983 | 637 #endif /* HAVE_BIGNUM */ |
| 638 case RATIO_T: | |
| 639 #ifdef HAVE_RATIO | |
| 640 ratio_set_bigfloat (scratch_ratio, XBIGFLOAT_DATA (number)); | |
| 641 return make_ratio_rt (scratch_ratio); | |
| 642 #else | |
| 2500 | 643 ABORT (); |
| 1983 | 644 #endif |
| 645 case FLOAT_T: | |
| 646 return make_float (bigfloat_to_double (XBIGFLOAT_DATA (number))); | |
| 647 case BIGFLOAT_T: | |
| 648 /* FIXME: Do we need to change the precision? */ | |
| 649 return number; | |
| 650 } | |
| 651 #else | |
| 2500 | 652 ABORT (); |
| 1983 | 653 #endif /* HAVE_BIGFLOAT */ |
| 654 } | |
| 2500 | 655 ABORT (); |
| 1995 | 656 /* NOTREACHED */ |
| 657 return Qzero; | |
| 1983 | 658 } |
| 659 | |
| 660 /* This function promotes its arguments as necessary to make them both the | |
| 661 same type. It destructively modifies its arguments to do so. Characters | |
| 662 and markers are ALWAYS converted to integers. */ | |
| 663 enum number_type | |
| 664 promote_args (Lisp_Object *arg1, Lisp_Object *arg2) | |
| 665 { | |
| 666 enum number_type type1, type2; | |
| 667 | |
| 668 if (CHARP (*arg1)) | |
| 669 *arg1 = make_int (XCHAR (*arg1)); | |
| 670 else if (MARKERP (*arg1)) | |
| 671 *arg1 = make_int (marker_position (*arg1)); | |
| 672 if (CHARP (*arg2)) | |
| 673 *arg2 = make_int (XCHAR (*arg2)); | |
| 674 else if (MARKERP (*arg2)) | |
| 675 *arg2 = make_int (marker_position (*arg2)); | |
| 676 | |
| 677 CHECK_NUMBER (*arg1); | |
| 678 CHECK_NUMBER (*arg2); | |
| 679 | |
| 680 type1 = get_number_type (*arg1); | |
| 681 type2 = get_number_type (*arg2); | |
| 682 | |
| 683 if (type1 < type2) | |
| 684 { | |
| 685 *arg1 = internal_coerce_number (*arg1, type2, | |
| 686 #ifdef HAVE_BIGFLOAT | |
| 687 type2 == BIGFLOAT_T | |
| 688 ? XBIGFLOAT_GET_PREC (*arg2) : | |
| 689 #endif | |
| 690 0UL); | |
| 691 return type2; | |
| 692 } | |
|
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693 |
| 1983 | 694 if (type2 < type1) |
| 695 { | |
| 696 *arg2 = internal_coerce_number (*arg2, type1, | |
| 697 #ifdef HAVE_BIGFLOAT | |
| 698 type1 == BIGFLOAT_T | |
| 699 ? XBIGFLOAT_GET_PREC (*arg1) : | |
| 700 #endif | |
| 701 0UL); | |
| 702 return type1; | |
| 703 } | |
| 704 | |
| 705 /* No conversion necessary */ | |
| 706 return type1; | |
| 707 } | |
| 708 | |
| 709 DEFUN ("coerce-number", Fcoerce_number, 2, 3, 0, /* | |
| 710 Convert NUMBER to the indicated type, possibly losing information. | |
| 711 Do not call this function. Use `coerce' instead. | |
| 712 | |
| 3025 | 713 TYPE is one of the symbols `fixnum', `integer', `ratio', `float', or |
| 714 `bigfloat'. Not all of these types may be supported. | |
| 1983 | 715 |
| 716 PRECISION is the number of bits of precision to use when converting to | |
| 717 bigfloat; it is ignored otherwise. If nil, the default precision is used. | |
| 718 | |
| 719 Note that some conversions lose information. No error is signaled in such | |
| 720 cases; the information is silently lost. | |
| 721 */ | |
| 2595 | 722 (number, type, USED_IF_BIGFLOAT (precision))) |
| 1983 | 723 { |
| 724 CHECK_SYMBOL (type); | |
| 725 if (EQ (type, Qfixnum)) | |
| 726 return internal_coerce_number (number, FIXNUM_T, 0UL); | |
| 727 else if (EQ (type, Qinteger)) | |
| 728 { | |
| 729 /* If bignums are available, we always convert to one first, then | |
| 730 downgrade to a fixnum if possible. */ | |
| 731 #ifdef HAVE_BIGNUM | |
| 732 return Fcanonicalize_number | |
| 733 (internal_coerce_number (number, BIGNUM_T, 0UL)); | |
| 734 #else | |
| 735 return internal_coerce_number (number, FIXNUM_T, 0UL); | |
| 736 #endif | |
| 737 } | |
| 738 #ifdef HAVE_RATIO | |
| 739 else if (EQ (type, Qratio)) | |
| 740 return internal_coerce_number (number, RATIO_T, 0UL); | |
| 741 #endif | |
| 742 else if (EQ (type, Qfloat)) | |
| 743 return internal_coerce_number (number, FLOAT_T, 0UL); | |
| 744 #ifdef HAVE_BIGFLOAT | |
| 745 else if (EQ (type, Qbigfloat)) | |
| 746 { | |
| 747 unsigned long prec; | |
| 748 | |
| 749 if (NILP (precision)) | |
| 750 prec = bigfloat_get_default_prec (); | |
| 751 else | |
| 752 { | |
| 753 CHECK_INTEGER (precision); | |
| 754 #ifdef HAVE_BIGNUM | |
| 755 if (INTP (precision)) | |
| 756 #endif /* HAVE_BIGNUM */ | |
| 757 prec = (unsigned long) XREALINT (precision); | |
| 758 #ifdef HAVE_BIGNUM | |
| 759 else | |
| 760 { | |
| 761 if (!bignum_fits_ulong_p (XBIGNUM_DATA (precision))) | |
| 762 args_out_of_range (precision, Vbigfloat_max_prec); | |
| 763 prec = bignum_to_ulong (XBIGNUM_DATA (precision)); | |
| 764 } | |
| 765 #endif /* HAVE_BIGNUM */ | |
| 766 } | |
| 767 return internal_coerce_number (number, BIGFLOAT_T, prec); | |
| 768 } | |
| 769 #endif /* HAVE_BIGFLOAT */ | |
| 770 | |
| 771 Fsignal (Qunsupported_type, type); | |
| 772 /* NOTREACHED */ | |
| 773 return Qnil; | |
| 774 } | |
| 775 | |
| 776 | |
| 777 void | |
| 778 syms_of_number (void) | |
| 779 { | |
| 780 #ifdef HAVE_BIGNUM | |
|
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781 INIT_LISP_OBJECT (bignum); |
| 1983 | 782 #endif |
| 783 #ifdef HAVE_RATIO | |
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784 INIT_LISP_OBJECT (ratio); |
| 1983 | 785 #endif |
| 786 #ifdef HAVE_BIGFLOAT | |
|
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787 INIT_LISP_OBJECT (bigfloat); |
| 1983 | 788 #endif |
| 789 | |
| 790 /* Type predicates */ | |
| 791 DEFSYMBOL (Qrationalp); | |
| 792 DEFSYMBOL (Qfloatingp); | |
| 793 DEFSYMBOL (Qrealp); | |
| 794 DEFSYMBOL (Qbignump); | |
| 795 DEFSYMBOL (Qratiop); | |
| 796 DEFSYMBOL (Qbigfloatp); | |
| 797 | |
| 798 /* Functions */ | |
| 799 DEFSUBR (Fbignump); | |
| 800 DEFSUBR (Fratiop); | |
| 801 DEFSUBR (Frationalp); | |
| 802 DEFSUBR (Fnumerator); | |
| 803 DEFSUBR (Fdenominator); | |
| 804 DEFSUBR (Fbigfloatp); | |
| 2092 | 805 DEFSUBR (Fbigfloat_get_precision); |
| 806 DEFSUBR (Fbigfloat_set_precision); | |
| 2001 | 807 DEFSUBR (Ffloatingp); |
| 1983 | 808 DEFSUBR (Frealp); |
| 809 DEFSUBR (Fcanonicalize_number); | |
| 810 DEFSUBR (Fcoerce_number); | |
| 811 | |
| 812 /* Errors */ | |
| 813 DEFERROR_STANDARD (Qunsupported_type, Qwrong_type_argument); | |
| 814 } | |
| 815 | |
| 816 void | |
| 817 vars_of_number (void) | |
| 818 { | |
| 2051 | 819 /* These variables are Lisp variables rather than number variables so that |
| 820 we can put bignums in them. */ | |
| 1983 | 821 DEFVAR_LISP_MAGIC ("default-float-precision", &Vdefault_float_precision, /* |
| 822 The default floating-point precision for newly created floating point values. | |
| 2092 | 823 This should be 0 to create Lisp float types, or an unsigned integer no greater |
| 824 than `bigfloat-maximum-precision' to create Lisp bigfloat types with the | |
| 825 indicated precision. | |
| 1983 | 826 */ default_float_precision_changed); |
| 827 Vdefault_float_precision = make_int (0); | |
| 828 | |
| 2092 | 829 DEFVAR_CONST_LISP ("bigfloat-maximum-precision", &Vbigfloat_max_prec /* |
| 1983 | 830 The maximum number of bits of precision a bigfloat can have. |
| 2092 | 831 This is determined by the underlying library used to implement bigfloats. |
| 1983 | 832 */); |
| 833 | |
| 2061 | 834 #ifdef HAVE_BIGFLOAT |
|
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835 /* Don't create a bignum here. Otherwise, we lose with NEW_GC + pdump. |
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836 See reinit_vars_of_number(). */ |
| 2061 | 837 Vbigfloat_max_prec = make_int (EMACS_INT_MAX); |
| 838 #else | |
| 2051 | 839 Vbigfloat_max_prec = make_int (0); |
| 840 #endif /* HAVE_BIGFLOAT */ | |
| 841 | |
| 1983 | 842 Fprovide (intern ("number-types")); |
| 843 #ifdef HAVE_BIGNUM | |
| 844 Fprovide (intern ("bignum")); | |
| 845 #endif | |
| 846 #ifdef HAVE_RATIO | |
| 847 Fprovide (intern ("ratio")); | |
| 848 #endif | |
| 849 #ifdef HAVE_BIGFLOAT | |
| 850 Fprovide (intern ("bigfloat")); | |
| 851 #endif | |
| 852 } | |
| 853 | |
| 854 void | |
|
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855 reinit_vars_of_number (void) |
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856 { |
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857 #if defined(HAVE_BIGFLOAT) && defined(HAVE_BIGNUM) |
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858 Vbigfloat_max_prec = make_bignum (0L); |
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859 bignum_set_ulong (XBIGNUM_DATA (Vbigfloat_max_prec), ULONG_MAX); |
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860 #endif |
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861 } |
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862 |
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863 void |
| 1983 | 864 init_number (void) |
| 865 { | |
| 866 if (!number_initialized) | |
| 867 { | |
| 868 number_initialized = 1; | |
| 869 | |
| 870 #ifdef WITH_GMP | |
| 871 init_number_gmp (); | |
| 872 #endif | |
| 873 #ifdef WITH_MP | |
| 874 init_number_mp (); | |
| 875 #endif | |
| 876 | |
| 877 #ifdef HAVE_BIGNUM | |
| 878 bignum_init (scratch_bignum); | |
| 879 bignum_init (scratch_bignum2); | |
| 880 #endif | |
| 881 | |
| 882 #ifdef HAVE_RATIO | |
| 883 ratio_init (scratch_ratio); | |
|
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884 ratio_init (scratch_ratio2); |
| 1983 | 885 #endif |
| 886 | |
| 887 #ifdef HAVE_BIGFLOAT | |
| 888 bigfloat_init (scratch_bigfloat); | |
| 889 bigfloat_init (scratch_bigfloat2); | |
| 890 #endif | |
|
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891 |
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892 #ifndef PDUMP |
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893 reinit_vars_of_number (); |
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894 #endif |
| 1983 | 895 } |
| 896 } |