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f81e080b DH |
1 | /* Copyright (C) 1995,1996,1997,1998,1999,2000 Free Software Foundation, Inc. |
2 | * | |
0f2d19dd JB |
3 | * This program is free software; you can redistribute it and/or modify |
4 | * it under the terms of the GNU General Public License as published by | |
5 | * the Free Software Foundation; either version 2, or (at your option) | |
6 | * any later version. | |
7 | * | |
8 | * This program is distributed in the hope that it will be useful, | |
9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
11 | * GNU General Public License for more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public License | |
14 | * along with this software; see the file COPYING. If not, write to | |
82892bed JB |
15 | * the Free Software Foundation, Inc., 59 Temple Place, Suite 330, |
16 | * Boston, MA 02111-1307 USA | |
0f2d19dd JB |
17 | * |
18 | * As a special exception, the Free Software Foundation gives permission | |
19 | * for additional uses of the text contained in its release of GUILE. | |
20 | * | |
21 | * The exception is that, if you link the GUILE library with other files | |
22 | * to produce an executable, this does not by itself cause the | |
23 | * resulting executable to be covered by the GNU General Public License. | |
24 | * Your use of that executable is in no way restricted on account of | |
25 | * linking the GUILE library code into it. | |
26 | * | |
27 | * This exception does not however invalidate any other reasons why | |
28 | * the executable file might be covered by the GNU General Public License. | |
29 | * | |
30 | * This exception applies only to the code released by the | |
31 | * Free Software Foundation under the name GUILE. If you copy | |
32 | * code from other Free Software Foundation releases into a copy of | |
33 | * GUILE, as the General Public License permits, the exception does | |
34 | * not apply to the code that you add in this way. To avoid misleading | |
35 | * anyone as to the status of such modified files, you must delete | |
36 | * this exception notice from them. | |
37 | * | |
38 | * If you write modifications of your own for GUILE, it is your choice | |
39 | * whether to permit this exception to apply to your modifications. | |
82892bed | 40 | * If you do not wish that, delete this exception notice. */ |
1bbd0b84 GB |
41 | |
42 | /* Software engineering face-lift by Greg J. Badros, 11-Dec-1999, | |
43 | gjb@cs.washington.edu, http://www.cs.washington.edu/homes/gjb */ | |
44 | ||
0f2d19dd JB |
45 | \f |
46 | ||
47 | #include <stdio.h> | |
48 | #include <math.h> | |
a0599745 | 49 | #include "libguile/_scm.h" |
a0599745 MD |
50 | #include "libguile/feature.h" |
51 | #include "libguile/ports.h" | |
52 | #include "libguile/root.h" | |
53 | #include "libguile/smob.h" | |
54 | #include "libguile/strings.h" | |
55 | #include "libguile/vectors.h" | |
56 | ||
57 | #include "libguile/validate.h" | |
58 | #include "libguile/numbers.h" | |
f4c627b3 | 59 | |
0f2d19dd | 60 | \f |
f4c627b3 DH |
61 | |
62 | static SCM scm_divbigbig (SCM_BIGDIG *x, scm_sizet nx, SCM_BIGDIG *y, scm_sizet ny, int sgn, int modes); | |
63 | static SCM scm_divbigint (SCM x, long z, int sgn, int mode); | |
64 | ||
65 | ||
0f2d19dd JB |
66 | #define DIGITS '0':case '1':case '2':case '3':case '4':\ |
67 | case '5':case '6':case '7':case '8':case '9' | |
68 | ||
69 | ||
09fb7599 DH |
70 | #define SCM_SWAP(x,y) do { SCM __t = x; x = y; y = __t; } while (0) |
71 | ||
72 | ||
3a9809df | 73 | #if (SCM_DEBUG_DEPRECATED == 1) /* not defined in header yet? */ |
3a9809df DH |
74 | |
75 | /* SCM_FLOBUFLEN is the maximum number of characters neccessary for the | |
76 | * printed or scm_string representation of an inexact number. | |
77 | */ | |
78 | #define SCM_FLOBUFLEN (10+2*(sizeof(double)/sizeof(char)*SCM_CHAR_BIT*3+9)/10) | |
894a712b DH |
79 | |
80 | #endif /* SCM_DEBUG_DEPRECATED == 1 */ | |
3a9809df DH |
81 | |
82 | ||
0f2d19dd | 83 | /* IS_INF tests its floating point number for infiniteness |
5986c47d | 84 | Dirk:FIXME:: This test does not work if x == 0 |
0f2d19dd JB |
85 | */ |
86 | #ifndef IS_INF | |
7235ee58 | 87 | #define IS_INF(x) ((x) == (x) / 2) |
0f2d19dd JB |
88 | #endif |
89 | ||
5986c47d | 90 | |
e6f3ef58 | 91 | /* Return true if X is not infinite and is not a NaN |
5986c47d | 92 | Dirk:FIXME:: Since IS_INF is broken, this test does not work if x == 0 |
e6f3ef58 MD |
93 | */ |
94 | #ifndef isfinite | |
95 | #define isfinite(x) (!IS_INF (x) && (x) == (x)) | |
96 | #endif | |
97 | ||
0f2d19dd JB |
98 | \f |
99 | ||
f872b822 | 100 | |
a1ec6916 | 101 | SCM_DEFINE (scm_exact_p, "exact?", 1, 0, 0, |
1bbd0b84 | 102 | (SCM x), |
4219f20d | 103 | "Return #t if X is an exact number, #f otherwise.") |
1bbd0b84 | 104 | #define FUNC_NAME s_scm_exact_p |
0f2d19dd | 105 | { |
4219f20d | 106 | if (SCM_INUMP (x)) { |
f872b822 | 107 | return SCM_BOOL_T; |
4219f20d | 108 | } else if (SCM_BIGP (x)) { |
f872b822 | 109 | return SCM_BOOL_T; |
4219f20d DH |
110 | } else { |
111 | return SCM_BOOL_F; | |
112 | } | |
0f2d19dd | 113 | } |
1bbd0b84 | 114 | #undef FUNC_NAME |
0f2d19dd | 115 | |
4219f20d | 116 | |
a1ec6916 | 117 | SCM_DEFINE (scm_odd_p, "odd?", 1, 0, 0, |
1bbd0b84 | 118 | (SCM n), |
4219f20d | 119 | "Return #t if N is an odd number, #f otherwise.") |
1bbd0b84 | 120 | #define FUNC_NAME s_scm_odd_p |
0f2d19dd | 121 | { |
4219f20d DH |
122 | if (SCM_INUMP (n)) { |
123 | return SCM_BOOL ((4 & SCM_UNPACK (n)) != 0); | |
4219f20d DH |
124 | } else if (SCM_BIGP (n)) { |
125 | return SCM_BOOL ((1 & SCM_BDIGITS (n) [0]) != 0); | |
4219f20d | 126 | } else { |
a1a33b0f | 127 | SCM_WRONG_TYPE_ARG (1, n); |
4219f20d | 128 | } |
0f2d19dd | 129 | } |
1bbd0b84 | 130 | #undef FUNC_NAME |
0f2d19dd | 131 | |
4219f20d | 132 | |
a1ec6916 | 133 | SCM_DEFINE (scm_even_p, "even?", 1, 0, 0, |
1bbd0b84 | 134 | (SCM n), |
4219f20d | 135 | "Return #t if N is an even number, #f otherwise.") |
1bbd0b84 | 136 | #define FUNC_NAME s_scm_even_p |
0f2d19dd | 137 | { |
4219f20d DH |
138 | if (SCM_INUMP (n)) { |
139 | return SCM_BOOL ((4 & SCM_UNPACK (n)) == 0); | |
4219f20d DH |
140 | } else if (SCM_BIGP (n)) { |
141 | return SCM_BOOL ((1 & SCM_BDIGITS (n) [0]) == 0); | |
4219f20d | 142 | } else { |
a1a33b0f | 143 | SCM_WRONG_TYPE_ARG (1, n); |
4219f20d | 144 | } |
0f2d19dd | 145 | } |
1bbd0b84 | 146 | #undef FUNC_NAME |
0f2d19dd | 147 | |
4219f20d | 148 | |
9de33deb | 149 | SCM_GPROC (s_abs, "abs", 1, 0, 0, scm_abs, g_abs); |
1cc91f1b | 150 | |
0f2d19dd | 151 | SCM |
6e8d25a6 | 152 | scm_abs (SCM x) |
0f2d19dd | 153 | { |
4219f20d DH |
154 | if (SCM_INUMP (x)) { |
155 | long int xx = SCM_INUM (x); | |
156 | if (xx >= 0) { | |
157 | return x; | |
158 | } else if (SCM_POSFIXABLE (-xx)) { | |
159 | return SCM_MAKINUM (-xx); | |
160 | } else { | |
0f2d19dd | 161 | #ifdef SCM_BIGDIG |
4219f20d | 162 | return scm_long2big (-xx); |
0f2d19dd | 163 | #else |
4219f20d | 164 | scm_num_overflow (s_abs); |
0f2d19dd | 165 | #endif |
4219f20d | 166 | } |
4219f20d DH |
167 | } else if (SCM_BIGP (x)) { |
168 | if (!SCM_BIGSIGN (x)) { | |
169 | return x; | |
170 | } else { | |
171 | return scm_copybig (x, 0); | |
172 | } | |
5986c47d DH |
173 | } else if (SCM_REALP (x)) { |
174 | return scm_make_real (fabs (SCM_REAL_VALUE (x))); | |
4219f20d DH |
175 | } else { |
176 | SCM_WTA_DISPATCH_1 (g_abs, x, 1, s_abs); | |
177 | } | |
0f2d19dd JB |
178 | } |
179 | ||
4219f20d | 180 | |
9de33deb | 181 | SCM_GPROC (s_quotient, "quotient", 2, 0, 0, scm_quotient, g_quotient); |
1cc91f1b | 182 | |
0f2d19dd | 183 | SCM |
6e8d25a6 | 184 | scm_quotient (SCM x, SCM y) |
0f2d19dd | 185 | { |
828865c3 DH |
186 | if (SCM_INUMP (x)) { |
187 | long xx = SCM_INUM (x); | |
188 | if (SCM_INUMP (y)) { | |
189 | long yy = SCM_INUM (y); | |
190 | if (yy == 0) { | |
191 | scm_num_overflow (s_quotient); | |
192 | } else { | |
193 | long z = xx / yy; | |
4219f20d DH |
194 | if (SCM_FIXABLE (z)) { |
195 | return SCM_MAKINUM (z); | |
196 | } else { | |
828865c3 DH |
197 | #ifdef SCM_BIGDIG |
198 | return scm_long2big (z); | |
199 | #else | |
200 | scm_num_overflow (s_quotient); | |
201 | #endif | |
828865c3 DH |
202 | } |
203 | } | |
4219f20d DH |
204 | } else if (SCM_BIGP (y)) { |
205 | return SCM_INUM0; | |
4219f20d DH |
206 | } else { |
207 | SCM_WTA_DISPATCH_2 (g_quotient, x, y, SCM_ARG2, s_quotient); | |
828865c3 | 208 | } |
4219f20d DH |
209 | } else if (SCM_BIGP (x)) { |
210 | if (SCM_INUMP (y)) { | |
828865c3 DH |
211 | long yy = SCM_INUM (y); |
212 | if (yy == 0) { | |
213 | scm_num_overflow (s_quotient); | |
214 | } else if (yy == 1) { | |
f872b822 | 215 | return x; |
828865c3 DH |
216 | } else { |
217 | long z = yy < 0 ? -yy : yy; | |
218 | ||
219 | if (z < SCM_BIGRAD) { | |
220 | SCM sw = scm_copybig (x, SCM_BIGSIGN (x) ? (yy > 0) : (yy < 0)); | |
c209c88e GB |
221 | scm_divbigdig (SCM_BDIGITS (sw), SCM_NUMDIGS (sw), (SCM_BIGDIG) z); |
222 | return scm_normbig (sw); | |
828865c3 | 223 | } else { |
0f2d19dd | 224 | #ifndef SCM_DIGSTOOBIG |
828865c3 DH |
225 | long w = scm_pseudolong (z); |
226 | return scm_divbigbig (SCM_BDIGITS (x), SCM_NUMDIGS (x), | |
227 | (SCM_BIGDIG *) & w, SCM_DIGSPERLONG, | |
228 | SCM_BIGSIGN (x) ? (yy > 0) : (yy < 0), 2); | |
0f2d19dd | 229 | #else |
828865c3 DH |
230 | SCM_BIGDIG zdigs[SCM_DIGSPERLONG]; |
231 | scm_longdigs (z, zdigs); | |
232 | return scm_divbigbig (SCM_BDIGITS (x), SCM_NUMDIGS (x), | |
233 | zdigs, SCM_DIGSPERLONG, | |
234 | SCM_BIGSIGN (x) ? (yy > 0) : (yy < 0), 2); | |
f872b822 | 235 | #endif |
f872b822 | 236 | } |
828865c3 | 237 | } |
4219f20d DH |
238 | } else if (SCM_BIGP (y)) { |
239 | return scm_divbigbig (SCM_BDIGITS (x), SCM_NUMDIGS (x), | |
240 | SCM_BDIGITS (y), SCM_NUMDIGS (y), | |
241 | SCM_BIGSIGN (x) ^ SCM_BIGSIGN (y), 2); | |
242 | } else { | |
243 | SCM_WTA_DISPATCH_2 (g_quotient, x, y, SCM_ARG2, s_quotient); | |
f872b822 | 244 | } |
4219f20d | 245 | } else { |
89a7e495 | 246 | SCM_WTA_DISPATCH_2 (g_quotient, x, y, SCM_ARG1, s_quotient); |
0f2d19dd | 247 | } |
0f2d19dd JB |
248 | } |
249 | ||
4219f20d | 250 | |
9de33deb | 251 | SCM_GPROC (s_remainder, "remainder", 2, 0, 0, scm_remainder, g_remainder); |
1cc91f1b | 252 | |
0f2d19dd | 253 | SCM |
6e8d25a6 | 254 | scm_remainder (SCM x, SCM y) |
0f2d19dd | 255 | { |
89a7e495 DH |
256 | if (SCM_INUMP (x)) { |
257 | if (SCM_INUMP (y)) { | |
258 | long yy = SCM_INUM (y); | |
259 | if (yy == 0) { | |
260 | scm_num_overflow (s_remainder); | |
261 | } else { | |
89a7e495 | 262 | long z = SCM_INUM (x) % yy; |
89a7e495 DH |
263 | return SCM_MAKINUM (z); |
264 | } | |
89a7e495 | 265 | } else if (SCM_BIGP (y)) { |
f872b822 | 266 | return x; |
89a7e495 DH |
267 | } else { |
268 | SCM_WTA_DISPATCH_2 (g_remainder, x, y, SCM_ARG2, s_remainder); | |
269 | } | |
89a7e495 DH |
270 | } else if (SCM_BIGP (x)) { |
271 | if (SCM_INUMP (y)) { | |
272 | long yy = SCM_INUM (y); | |
273 | if (yy == 0) { | |
274 | scm_num_overflow (s_remainder); | |
275 | } else { | |
276 | return scm_divbigint (x, yy, SCM_BIGSIGN (x), 0); | |
277 | } | |
278 | } else if (SCM_BIGP (y)) { | |
279 | return scm_divbigbig (SCM_BDIGITS (x), SCM_NUMDIGS (x), | |
280 | SCM_BDIGITS (y), SCM_NUMDIGS (y), | |
281 | SCM_BIGSIGN (x), 0); | |
282 | } else { | |
283 | SCM_WTA_DISPATCH_2 (g_remainder, x, y, SCM_ARG2, s_remainder); | |
f872b822 | 284 | } |
89a7e495 DH |
285 | } else { |
286 | SCM_WTA_DISPATCH_2 (g_remainder, x, y, SCM_ARG1, s_remainder); | |
287 | } | |
0f2d19dd JB |
288 | } |
289 | ||
89a7e495 | 290 | |
9de33deb | 291 | SCM_GPROC (s_modulo, "modulo", 2, 0, 0, scm_modulo, g_modulo); |
1cc91f1b | 292 | |
0f2d19dd | 293 | SCM |
6e8d25a6 | 294 | scm_modulo (SCM x, SCM y) |
0f2d19dd | 295 | { |
828865c3 DH |
296 | if (SCM_INUMP (x)) { |
297 | long xx = SCM_INUM (x); | |
298 | if (SCM_INUMP (y)) { | |
299 | long yy = SCM_INUM (y); | |
300 | if (yy == 0) { | |
301 | scm_num_overflow (s_modulo); | |
302 | } else { | |
828865c3 | 303 | long z = xx % yy; |
828865c3 DH |
304 | return SCM_MAKINUM (((yy < 0) ? (z > 0) : (z < 0)) ? z + yy : z); |
305 | } | |
09fb7599 DH |
306 | } else if (SCM_BIGP (y)) { |
307 | return (SCM_BIGSIGN (y) ? (xx > 0) : (xx < 0)) ? scm_sum (x, y) : x; | |
09fb7599 DH |
308 | } else { |
309 | SCM_WTA_DISPATCH_2 (g_modulo, x, y, SCM_ARG2, s_modulo); | |
f872b822 | 310 | } |
09fb7599 DH |
311 | } else if (SCM_BIGP (x)) { |
312 | if (SCM_INUMP (y)) { | |
828865c3 DH |
313 | long yy = SCM_INUM (y); |
314 | if (yy == 0) { | |
315 | scm_num_overflow (s_modulo); | |
316 | } else { | |
317 | return scm_divbigint (x, yy, yy < 0, | |
318 | (SCM_BIGSIGN (x) ? (yy > 0) : (yy < 0)) ? 1 : 0); | |
319 | } | |
09fb7599 DH |
320 | } else if (SCM_BIGP (y)) { |
321 | return scm_divbigbig (SCM_BDIGITS (x), SCM_NUMDIGS (x), | |
322 | SCM_BDIGITS (y), SCM_NUMDIGS (y), | |
323 | SCM_BIGSIGN (y), | |
324 | (SCM_BIGSIGN (x) ^ SCM_BIGSIGN (y)) ? 1 : 0); | |
325 | } else { | |
326 | SCM_WTA_DISPATCH_2 (g_modulo, x, y, SCM_ARG2, s_modulo); | |
828865c3 | 327 | } |
09fb7599 DH |
328 | } else { |
329 | SCM_WTA_DISPATCH_2 (g_modulo, x, y, SCM_ARG1, s_modulo); | |
828865c3 | 330 | } |
0f2d19dd JB |
331 | } |
332 | ||
09fb7599 | 333 | |
9de33deb | 334 | SCM_GPROC1 (s_gcd, "gcd", scm_tc7_asubr, scm_gcd, g_gcd); |
1cc91f1b | 335 | |
0f2d19dd | 336 | SCM |
6e8d25a6 | 337 | scm_gcd (SCM x, SCM y) |
0f2d19dd | 338 | { |
09fb7599 DH |
339 | if (SCM_UNBNDP (y)) { |
340 | if (SCM_UNBNDP (x)) { | |
341 | return SCM_INUM0; | |
342 | } else { | |
343 | return x; | |
344 | } | |
345 | } | |
f8de44c1 | 346 | |
0f2d19dd | 347 | tailrec: |
09fb7599 DH |
348 | if (SCM_INUMP (x)) { |
349 | if (SCM_INUMP (y)) { | |
350 | long xx = SCM_INUM (x); | |
351 | long yy = SCM_INUM (y); | |
352 | long u = xx < 0 ? -xx : xx; | |
353 | long v = yy < 0 ? -yy : yy; | |
354 | long result; | |
355 | ||
356 | if (xx == 0) { | |
357 | result = v; | |
358 | } else if (yy == 0) { | |
359 | result = u; | |
360 | } else { | |
361 | int k = 1; | |
362 | long t; | |
363 | ||
364 | /* Determine a common factor 2^k */ | |
365 | while (!(1 & (u | v))) { | |
366 | k <<= 1; | |
367 | u >>= 1; | |
368 | v >>= 1; | |
f872b822 | 369 | } |
09fb7599 DH |
370 | |
371 | /* Now, any factor 2^n can be eliminated */ | |
372 | if (u & 1) { | |
373 | t = -v; | |
374 | } else { | |
375 | t = u; | |
376 | b3: | |
377 | t = SCM_SRS (t, 1); | |
378 | } | |
379 | if (!(1 & t)) | |
380 | goto b3; | |
381 | if (t > 0) | |
382 | u = t; | |
383 | else | |
384 | v = -t; | |
385 | t = u - v; | |
386 | if (t != 0) | |
387 | goto b3; | |
388 | ||
389 | result = u * k; | |
390 | } | |
391 | if (SCM_POSFIXABLE (result)) { | |
392 | return SCM_MAKINUM (result); | |
393 | } else { | |
394 | #ifdef SCM_BIGDIG | |
395 | return scm_long2big (result); | |
f872b822 | 396 | #else |
09fb7599 DH |
397 | scm_num_overflow (s_gcd); |
398 | #endif | |
399 | } | |
09fb7599 DH |
400 | } else if (SCM_BIGP (y)) { |
401 | SCM_SWAP (x, y); | |
402 | goto big_gcd; | |
09fb7599 DH |
403 | } else { |
404 | SCM_WTA_DISPATCH_2 (g_gcd, x, y, SCM_ARG2, s_gcd); | |
f872b822 | 405 | } |
09fb7599 DH |
406 | } else if (SCM_BIGP (x)) { |
407 | big_gcd: | |
408 | if (SCM_BIGSIGN (x)) | |
409 | x = scm_copybig (x, 0); | |
410 | newy: | |
411 | if (SCM_INUMP (y)) { | |
412 | if (SCM_EQ_P (y, SCM_INUM0)) { | |
413 | return x; | |
414 | } else { | |
415 | goto swaprec; | |
416 | } | |
417 | } else if (SCM_BIGP (y)) { | |
418 | if (SCM_BIGSIGN (y)) | |
419 | y = scm_copybig (y, 0); | |
420 | switch (scm_bigcomp (x, y)) | |
421 | { | |
422 | case -1: /* x > y */ | |
423 | swaprec: | |
424 | { | |
425 | SCM t = scm_remainder (x, y); | |
426 | x = y; | |
427 | y = t; | |
428 | } | |
429 | goto tailrec; | |
430 | case 1: /* x < y */ | |
431 | y = scm_remainder (y, x); | |
432 | goto newy; | |
433 | default: /* x == y */ | |
434 | return x; | |
435 | } | |
436 | /* instead of the switch, we could just | |
437 | return scm_gcd (y, scm_modulo (x, y)); */ | |
438 | } else { | |
439 | SCM_WTA_DISPATCH_2 (g_gcd, x, y, SCM_ARG2, s_gcd); | |
440 | } | |
09fb7599 DH |
441 | } else { |
442 | SCM_WTA_DISPATCH_2 (g_gcd, x, y, SCM_ARG1, s_gcd); | |
443 | } | |
0f2d19dd JB |
444 | } |
445 | ||
09fb7599 | 446 | |
9de33deb | 447 | SCM_GPROC1 (s_lcm, "lcm", scm_tc7_asubr, scm_lcm, g_lcm); |
1cc91f1b | 448 | |
0f2d19dd | 449 | SCM |
6e8d25a6 | 450 | scm_lcm (SCM n1, SCM n2) |
0f2d19dd | 451 | { |
09fb7599 DH |
452 | if (SCM_UNBNDP (n2)) { |
453 | if (SCM_UNBNDP (n1)) { | |
454 | return SCM_MAKINUM (1L); | |
455 | } else { | |
456 | n2 = SCM_MAKINUM (1L); | |
457 | } | |
458 | }; | |
459 | ||
02a3305a | 460 | #ifndef SCM_BIGDIG |
09fb7599 DH |
461 | SCM_GASSERT2 (SCM_INUMP (n1), g_lcm, n1, n2, SCM_ARG1, s_lcm); |
462 | SCM_GASSERT2 (SCM_INUMP (n2), g_lcm, n1, n2, SCM_ARGn, s_lcm); | |
9de33deb | 463 | #else |
09fb7599 | 464 | SCM_GASSERT2 (SCM_INUMP (n1) || SCM_BIGP (n1), |
9de33deb | 465 | g_lcm, n1, n2, SCM_ARG1, s_lcm); |
09fb7599 | 466 | SCM_GASSERT2 (SCM_INUMP (n2) || SCM_BIGP (n2), |
9de33deb MD |
467 | g_lcm, n1, n2, SCM_ARGn, s_lcm); |
468 | #endif | |
09fb7599 DH |
469 | |
470 | { | |
471 | SCM d = scm_gcd (n1, n2); | |
472 | if (SCM_EQ_P (d, SCM_INUM0)) { | |
473 | return d; | |
474 | } else { | |
475 | return scm_abs (scm_product (n1, scm_quotient (n2, d))); | |
f872b822 | 476 | } |
09fb7599 | 477 | } |
0f2d19dd JB |
478 | } |
479 | ||
09fb7599 | 480 | |
0f2d19dd | 481 | #ifndef scm_long2num |
c1bfcf60 GB |
482 | #define SCM_LOGOP_RETURN(x) scm_ulong2num(x) |
483 | #else | |
484 | #define SCM_LOGOP_RETURN(x) SCM_MAKINUM(x) | |
485 | #endif | |
486 | ||
8a525303 GB |
487 | |
488 | /* Emulating 2's complement bignums with sign magnitude arithmetic: | |
489 | ||
490 | Logand: | |
491 | X Y Result Method: | |
492 | (len) | |
493 | + + + x (map digit:logand X Y) | |
494 | + - + x (map digit:logand X (lognot (+ -1 Y))) | |
495 | - + + y (map digit:logand (lognot (+ -1 X)) Y) | |
496 | - - - (+ 1 (map digit:logior (+ -1 X) (+ -1 Y))) | |
497 | ||
498 | Logior: | |
499 | X Y Result Method: | |
500 | ||
501 | + + + (map digit:logior X Y) | |
502 | + - - y (+ 1 (map digit:logand (lognot X) (+ -1 Y))) | |
503 | - + - x (+ 1 (map digit:logand (+ -1 X) (lognot Y))) | |
504 | - - - x (+ 1 (map digit:logand (+ -1 X) (+ -1 Y))) | |
505 | ||
506 | Logxor: | |
507 | X Y Result Method: | |
508 | ||
509 | + + + (map digit:logxor X Y) | |
510 | + - - (+ 1 (map digit:logxor X (+ -1 Y))) | |
511 | - + - (+ 1 (map digit:logxor (+ -1 X) Y)) | |
512 | - - + (map digit:logxor (+ -1 X) (+ -1 Y)) | |
513 | ||
514 | Logtest: | |
515 | X Y Result | |
516 | ||
517 | + + (any digit:logand X Y) | |
518 | + - (any digit:logand X (lognot (+ -1 Y))) | |
519 | - + (any digit:logand (lognot (+ -1 X)) Y) | |
520 | - - #t | |
521 | ||
522 | */ | |
523 | ||
524 | #ifdef SCM_BIGDIG | |
525 | ||
526 | SCM scm_copy_big_dec(SCM b, int sign); | |
527 | SCM scm_copy_smaller(SCM_BIGDIG *x, scm_sizet nx, int zsgn); | |
528 | SCM scm_big_ior(SCM_BIGDIG *x, scm_sizet nx, int xsgn, SCM bigy); | |
529 | SCM scm_big_xor(SCM_BIGDIG *x, scm_sizet nx, int xsgn, SCM bigy); | |
530 | SCM scm_big_and(SCM_BIGDIG *x, scm_sizet nx, int xsgn, SCM bigy, int zsgn); | |
531 | SCM scm_big_test(SCM_BIGDIG *x, scm_sizet nx, int xsgn, SCM bigy); | |
532 | ||
533 | SCM scm_copy_big_dec(SCM b, int sign) | |
534 | { | |
535 | long num = -1; | |
536 | scm_sizet nx = SCM_NUMDIGS(b); | |
537 | scm_sizet i = 0; | |
538 | SCM ans = scm_mkbig(nx, sign); | |
539 | SCM_BIGDIG *src = SCM_BDIGITS(b), *dst = SCM_BDIGITS(ans); | |
540 | if SCM_BIGSIGN(b) do { | |
541 | num += src[i]; | |
542 | if (num < 0) {dst[i] = num + SCM_BIGRAD; num = -1;} | |
543 | else {dst[i] = SCM_BIGLO(num); num = 0;} | |
544 | } while (++i < nx); | |
545 | else | |
546 | while (nx--) dst[nx] = src[nx]; | |
547 | return ans; | |
548 | } | |
549 | ||
550 | SCM scm_copy_smaller(SCM_BIGDIG *x, scm_sizet nx, int zsgn) | |
551 | { | |
552 | long num = -1; | |
553 | scm_sizet i = 0; | |
554 | SCM z = scm_mkbig(nx, zsgn); | |
555 | SCM_BIGDIG *zds = SCM_BDIGITS(z); | |
556 | if (zsgn) do { | |
557 | num += x[i]; | |
558 | if (num < 0) {zds[i] = num + SCM_BIGRAD; num = -1;} | |
559 | else {zds[i] = SCM_BIGLO(num); num = 0;} | |
560 | } while (++i < nx); | |
561 | else do zds[i] = x[i]; while (++i < nx); | |
562 | return z; | |
563 | } | |
564 | ||
565 | SCM scm_big_ior(SCM_BIGDIG *x, scm_sizet nx, int xsgn, SCM bigy) | |
566 | /* Assumes nx <= SCM_NUMDIGS(bigy) */ | |
f3ae5d60 | 567 | /* Assumes xsgn equals either 0 or SCM_BIGSIGNFLAG */ |
8a525303 GB |
568 | { |
569 | long num = -1; | |
570 | scm_sizet i = 0, ny = SCM_NUMDIGS(bigy); | |
f3ae5d60 | 571 | SCM z = scm_copy_big_dec (bigy, xsgn & SCM_BIGSIGN (bigy)); |
8a525303 GB |
572 | SCM_BIGDIG *zds = SCM_BDIGITS(z); |
573 | if (xsgn) { | |
574 | do { | |
575 | num += x[i]; | |
576 | if (num < 0) {zds[i] |= num + SCM_BIGRAD; num = -1;} | |
577 | else {zds[i] |= SCM_BIGLO(num); num = 0;} | |
578 | } while (++i < nx); | |
579 | /* ========= Need to increment zds now =========== */ | |
580 | i = 0; num = 1; | |
581 | while (i < ny) { | |
582 | num += zds[i]; | |
583 | zds[i++] = SCM_BIGLO(num); | |
584 | num = SCM_BIGDN(num); | |
585 | if (!num) return z; | |
586 | } | |
587 | scm_adjbig(z, 1 + ny); /* OOPS, overflowed into next digit. */ | |
588 | SCM_BDIGITS(z)[ny] = 1; | |
589 | return z; | |
590 | } | |
591 | else do zds[i] = zds[i] | x[i]; while (++i < nx); | |
592 | return z; | |
593 | } | |
594 | ||
595 | SCM scm_big_xor(SCM_BIGDIG *x, scm_sizet nx, int xsgn, SCM bigy) | |
596 | /* Assumes nx <= SCM_NUMDIGS(bigy) */ | |
f3ae5d60 | 597 | /* Assumes xsgn equals either 0 or SCM_BIGSIGNFLAG */ |
8a525303 GB |
598 | { |
599 | long num = -1; | |
600 | scm_sizet i = 0, ny = SCM_NUMDIGS(bigy); | |
601 | SCM z = scm_copy_big_dec(bigy, xsgn ^ SCM_BIGSIGN(bigy)); | |
602 | SCM_BIGDIG *zds = SCM_BDIGITS(z); | |
603 | if (xsgn) do { | |
604 | num += x[i]; | |
605 | if (num < 0) {zds[i] ^= num + SCM_BIGRAD; num = -1;} | |
606 | else {zds[i] ^= SCM_BIGLO(num); num = 0;} | |
607 | } while (++i < nx); | |
608 | else do { | |
609 | zds[i] = zds[i] ^ x[i]; | |
610 | } while (++i < nx); | |
611 | ||
612 | if (xsgn ^ SCM_BIGSIGN(bigy)) { | |
613 | /* ========= Need to increment zds now =========== */ | |
614 | i = 0; num = 1; | |
615 | while (i < ny) { | |
616 | num += zds[i]; | |
617 | zds[i++] = SCM_BIGLO(num); | |
618 | num = SCM_BIGDN(num); | |
619 | if (!num) return scm_normbig(z); | |
620 | } | |
621 | } | |
622 | return scm_normbig(z); | |
623 | } | |
624 | ||
625 | SCM scm_big_and(SCM_BIGDIG *x, scm_sizet nx, int xsgn, SCM bigy, int zsgn) | |
626 | /* Assumes nx <= SCM_NUMDIGS(bigy) */ | |
f3ae5d60 MD |
627 | /* Assumes xsgn equals either 0 or SCM_BIGSIGNFLAG */ |
628 | /* return sign equals either 0 or SCM_BIGSIGNFLAG */ | |
8a525303 GB |
629 | { |
630 | long num = -1; | |
631 | scm_sizet i = 0; | |
632 | SCM z; | |
633 | SCM_BIGDIG *zds; | |
634 | if (xsgn==zsgn) { | |
635 | z = scm_copy_smaller(x, nx, zsgn); | |
636 | x = SCM_BDIGITS(bigy); | |
637 | xsgn = SCM_BIGSIGN(bigy); | |
638 | } | |
639 | else z = scm_copy_big_dec(bigy, zsgn); | |
640 | zds = SCM_BDIGITS(z); | |
641 | ||
642 | if (zsgn) { | |
643 | if (xsgn) do { | |
644 | num += x[i]; | |
645 | if (num < 0) {zds[i] &= num + SCM_BIGRAD; num = -1;} | |
646 | else {zds[i] &= SCM_BIGLO(num); num = 0;} | |
647 | } while (++i < nx); | |
648 | else do zds[i] = zds[i] & ~x[i]; while (++i < nx); | |
649 | /* ========= need to increment zds now =========== */ | |
650 | i = 0; num = 1; | |
651 | while (i < nx) { | |
652 | num += zds[i]; | |
653 | zds[i++] = SCM_BIGLO(num); | |
654 | num = SCM_BIGDN(num); | |
655 | if (!num) return scm_normbig(z); | |
656 | } | |
657 | } | |
658 | else if (xsgn) do { | |
659 | num += x[i]; | |
660 | if (num < 0) {zds[i] &= num + SCM_BIGRAD; num = -1;} | |
661 | else {zds[i] &= ~SCM_BIGLO(num); num = 0;} | |
662 | } while (++i < nx); | |
663 | else do zds[i] = zds[i] & x[i]; while (++i < nx); | |
664 | return scm_normbig(z); | |
665 | } | |
666 | ||
667 | SCM scm_big_test(SCM_BIGDIG *x, scm_sizet nx, int xsgn, SCM bigy) | |
668 | /* Assumes nx <= SCM_NUMDIGS(bigy) */ | |
f3ae5d60 | 669 | /* Assumes xsgn equals either 0 or SCM_BIGSIGNFLAG */ |
8a525303 GB |
670 | { |
671 | SCM_BIGDIG *y; | |
672 | scm_sizet i = 0; | |
673 | long num = -1; | |
674 | if (SCM_BIGSIGN(bigy) & xsgn) return SCM_BOOL_T; | |
675 | if (SCM_NUMDIGS(bigy) != nx && xsgn) return SCM_BOOL_T; | |
676 | y = SCM_BDIGITS(bigy); | |
677 | if (xsgn) | |
678 | do { | |
679 | num += x[i]; | |
680 | if (num < 0) { | |
681 | if (y[i] & ~(num + SCM_BIGRAD)) return SCM_BOOL_T; | |
682 | num = -1; | |
683 | } | |
684 | else { | |
685 | if (y[i] & ~SCM_BIGLO(num)) return SCM_BOOL_T; | |
686 | num = 0; | |
687 | } | |
688 | } while (++i < nx); | |
689 | else if SCM_BIGSIGN(bigy) | |
690 | do { | |
691 | num += y[i]; | |
692 | if (num < 0) { | |
693 | if (x[i] & ~(num + SCM_BIGRAD)) return SCM_BOOL_T; | |
694 | num = -1; | |
695 | } | |
696 | else { | |
697 | if (x[i] & ~SCM_BIGLO(num)) return SCM_BOOL_T; | |
698 | num = 0; | |
699 | } | |
700 | } while (++i < nx); | |
701 | else | |
702 | do if (x[i] & y[i]) return SCM_BOOL_T; | |
703 | while (++i < nx); | |
704 | return SCM_BOOL_F; | |
705 | } | |
706 | ||
707 | #endif | |
708 | ||
09fb7599 | 709 | |
c3ee7520 | 710 | SCM_DEFINE1 (scm_logand, "logand", scm_tc7_asubr, |
1bbd0b84 | 711 | (SCM n1, SCM n2), |
b380b885 MD |
712 | "Returns the integer which is the bit-wise AND of the two integer\n" |
713 | "arguments.\n\n" | |
714 | "Example:\n" | |
715 | "@lisp\n" | |
716 | "(number->string (logand #b1100 #b1010) 2)\n" | |
717 | " @result{} \"1000\"") | |
1bbd0b84 | 718 | #define FUNC_NAME s_scm_logand |
0f2d19dd | 719 | { |
9a00c9fc DH |
720 | long int nn1; |
721 | ||
09fb7599 DH |
722 | if (SCM_UNBNDP (n2)) { |
723 | if (SCM_UNBNDP (n1)) { | |
724 | return SCM_MAKINUM (-1); | |
725 | } else if (!SCM_NUMBERP (n1)) { | |
726 | SCM_WRONG_TYPE_ARG (SCM_ARG1, n1); | |
8a525303 | 727 | #ifndef SCM_RECKLESS |
09fb7599 | 728 | } else if (SCM_NUMBERP (n1)) { |
d28da049 | 729 | return n1; |
09fb7599 DH |
730 | } else { |
731 | SCM_WRONG_TYPE_ARG (SCM_ARG1, n1); | |
732 | #else | |
733 | } else { | |
734 | return n1; | |
735 | #endif | |
d28da049 | 736 | } |
8a525303 | 737 | } |
09fb7599 DH |
738 | |
739 | if (SCM_INUMP (n1)) { | |
9a00c9fc | 740 | nn1 = SCM_INUM (n1); |
09fb7599 DH |
741 | if (SCM_INUMP (n2)) { |
742 | long nn2 = SCM_INUM (n2); | |
743 | return SCM_MAKINUM (nn1 & nn2); | |
09fb7599 DH |
744 | } else if SCM_BIGP (n2) { |
745 | intbig: | |
746 | { | |
8a525303 | 747 | # ifndef SCM_DIGSTOOBIG |
09fb7599 DH |
748 | long z = scm_pseudolong (nn1); |
749 | if ((nn1 < 0) && SCM_BIGSIGN (n2)) { | |
750 | return scm_big_ior ((SCM_BIGDIG *) & z, SCM_DIGSPERLONG, | |
751 | SCM_BIGSIGNFLAG, n2); | |
752 | } else { | |
753 | return scm_big_and ((SCM_BIGDIG *) & z, SCM_DIGSPERLONG, | |
754 | (nn1 < 0) ? SCM_BIGSIGNFLAG : 0, n2, 0); | |
755 | } | |
8a525303 | 756 | # else |
09fb7599 DH |
757 | SCM_BIGDIG zdigs [SCM_DIGSPERLONG]; |
758 | scm_longdigs (nn1, zdigs); | |
759 | if ((nn1 < 0) && SCM_BIGSIGN (n2)) { | |
760 | return scm_big_ior (zdigs, SCM_DIGSPERLONG, SCM_BIGSIGNFLAG, n2); | |
761 | } else { | |
762 | return scm_big_and (zdigs, SCM_DIGSPERLONG, | |
763 | (nn1 < 0) ? SCM_BIGSIGNFLAG : 0, n2, 0); | |
764 | } | |
8a525303 | 765 | # endif |
09fb7599 | 766 | } |
09fb7599 DH |
767 | } else { |
768 | SCM_WRONG_TYPE_ARG (SCM_ARG2, n2); | |
769 | } | |
09fb7599 DH |
770 | } else if (SCM_BIGP (n1)) { |
771 | if (SCM_INUMP (n2)) { | |
772 | SCM_SWAP (n1, n2); | |
9a00c9fc | 773 | nn1 = SCM_INUM (n1); |
09fb7599 DH |
774 | goto intbig; |
775 | } else if (SCM_BIGP (n2)) { | |
776 | if (SCM_NUMDIGS (n1) > SCM_NUMDIGS (n2)) { | |
777 | SCM_SWAP (n1, n2); | |
778 | }; | |
779 | if ((SCM_BIGSIGN (n1)) && SCM_BIGSIGN (n2)) { | |
780 | return scm_big_ior (SCM_BDIGITS (n1), SCM_NUMDIGS (n1), | |
781 | SCM_BIGSIGNFLAG, n2); | |
782 | } else { | |
783 | return scm_big_and (SCM_BDIGITS (n1), SCM_NUMDIGS (n1), | |
784 | SCM_BIGSIGN (n1), n2, 0); | |
785 | } | |
786 | } else { | |
787 | SCM_WRONG_TYPE_ARG (SCM_ARG2, n2); | |
788 | } | |
09fb7599 DH |
789 | } else { |
790 | SCM_WRONG_TYPE_ARG (SCM_ARG1, n1); | |
791 | } | |
0f2d19dd | 792 | } |
1bbd0b84 | 793 | #undef FUNC_NAME |
0f2d19dd | 794 | |
09fb7599 | 795 | |
c3ee7520 | 796 | SCM_DEFINE1 (scm_logior, "logior", scm_tc7_asubr, |
1bbd0b84 | 797 | (SCM n1, SCM n2), |
b380b885 MD |
798 | "Returns the integer which is the bit-wise OR of the two integer\n" |
799 | "arguments.\n\n" | |
800 | "Example:\n" | |
801 | "@lisp\n" | |
802 | "(number->string (logior #b1100 #b1010) 2)\n" | |
803 | " @result{} \"1110\"\n" | |
804 | "@end lisp") | |
1bbd0b84 | 805 | #define FUNC_NAME s_scm_logior |
0f2d19dd | 806 | { |
9a00c9fc DH |
807 | long int nn1; |
808 | ||
09fb7599 DH |
809 | if (SCM_UNBNDP (n2)) { |
810 | if (SCM_UNBNDP (n1)) { | |
811 | return SCM_INUM0; | |
8a525303 | 812 | #ifndef SCM_RECKLESS |
09fb7599 | 813 | } else if (SCM_NUMBERP (n1)) { |
d28da049 | 814 | return n1; |
09fb7599 DH |
815 | } else { |
816 | SCM_WRONG_TYPE_ARG (SCM_ARG1, n1); | |
817 | #else | |
818 | } else { | |
819 | return n1; | |
820 | #endif | |
d28da049 | 821 | } |
8a525303 | 822 | } |
09fb7599 DH |
823 | |
824 | if (SCM_INUMP (n1)) { | |
9a00c9fc | 825 | nn1 = SCM_INUM (n1); |
09fb7599 DH |
826 | if (SCM_INUMP (n2)) { |
827 | long nn2 = SCM_INUM (n2); | |
828 | return SCM_MAKINUM (nn1 | nn2); | |
09fb7599 DH |
829 | } else if (SCM_BIGP (n2)) { |
830 | intbig: | |
831 | { | |
8a525303 | 832 | # ifndef SCM_DIGSTOOBIG |
09fb7599 DH |
833 | long z = scm_pseudolong (nn1); |
834 | if ((!(nn1 < 0)) && !SCM_BIGSIGN (n2)) { | |
835 | return scm_big_ior ((SCM_BIGDIG *) & z, SCM_DIGSPERLONG, | |
836 | (nn1 < 0) ? SCM_BIGSIGNFLAG : 0, n2); | |
837 | } else { | |
838 | return scm_big_and ((SCM_BIGDIG *) & z, SCM_DIGSPERLONG, | |
839 | (nn1 < 0) ? SCM_BIGSIGNFLAG : 0, n2, SCM_BIGSIGNFLAG); | |
840 | } | |
8a525303 | 841 | # else |
09fb7599 DH |
842 | BIGDIG zdigs [DIGSPERLONG]; |
843 | scm_longdigs (nn1, zdigs); | |
844 | if ((!(nn1 < 0)) && !SCM_BIGSIGN (n2)) { | |
845 | return scm_big_ior (zdigs, SCM_DIGSPERLONG, | |
846 | (nn1 < 0) ? SCM_BIGSIGNFLAG : 0, n2); | |
847 | } else { | |
848 | return scm_big_and (zdigs, SCM_DIGSPERLONG, | |
849 | (nn1 < 0) ? SCM_BIGSIGNFLAG : 0, n2, SCM_BIGSIGNFLAG); | |
850 | } | |
8a525303 | 851 | # endif |
09fb7599 | 852 | } |
09fb7599 DH |
853 | } else { |
854 | SCM_WRONG_TYPE_ARG (SCM_ARG2, n2); | |
855 | } | |
09fb7599 DH |
856 | } else if (SCM_BIGP (n1)) { |
857 | if (SCM_INUMP (n2)) { | |
858 | SCM_SWAP (n1, n2); | |
9a00c9fc | 859 | nn1 = SCM_INUM (n1); |
09fb7599 DH |
860 | goto intbig; |
861 | } else if (SCM_BIGP (n2)) { | |
862 | if (SCM_NUMDIGS (n1) > SCM_NUMDIGS (n2)) { | |
863 | SCM_SWAP (n1, n2); | |
864 | }; | |
865 | if ((!SCM_BIGSIGN (n1)) && !SCM_BIGSIGN (n2)) { | |
866 | return scm_big_ior (SCM_BDIGITS (n1), SCM_NUMDIGS (n1), | |
867 | SCM_BIGSIGN (n1), n2); | |
868 | } else { | |
869 | return scm_big_and (SCM_BDIGITS (n1), SCM_NUMDIGS (n1), | |
870 | SCM_BIGSIGN (n1), n2, SCM_BIGSIGNFLAG); | |
871 | } | |
872 | } else { | |
873 | SCM_WRONG_TYPE_ARG (SCM_ARG2, n2); | |
874 | } | |
09fb7599 DH |
875 | } else { |
876 | SCM_WRONG_TYPE_ARG (SCM_ARG1, n1); | |
877 | } | |
0f2d19dd | 878 | } |
1bbd0b84 | 879 | #undef FUNC_NAME |
0f2d19dd | 880 | |
09fb7599 | 881 | |
c3ee7520 | 882 | SCM_DEFINE1 (scm_logxor, "logxor", scm_tc7_asubr, |
1bbd0b84 | 883 | (SCM n1, SCM n2), |
b380b885 MD |
884 | "Returns the integer which is the bit-wise XOR of the two integer\n" |
885 | "arguments.\n\n" | |
886 | "Example:\n" | |
887 | "@lisp\n" | |
888 | "(number->string (logxor #b1100 #b1010) 2)\n" | |
889 | " @result{} \"110\"\n" | |
890 | "@end lisp") | |
1bbd0b84 | 891 | #define FUNC_NAME s_scm_logxor |
0f2d19dd | 892 | { |
9a00c9fc DH |
893 | long int nn1; |
894 | ||
09fb7599 DH |
895 | if (SCM_UNBNDP (n2)) { |
896 | if (SCM_UNBNDP (n1)) { | |
897 | return SCM_INUM0; | |
8a525303 | 898 | #ifndef SCM_RECKLESS |
09fb7599 DH |
899 | } else if (SCM_NUMBERP (n1)) { |
900 | return n1; | |
901 | } else { | |
902 | SCM_WRONG_TYPE_ARG (SCM_ARG1, n1); | |
903 | #else | |
904 | } else { | |
d28da049 | 905 | return n1; |
09fb7599 | 906 | #endif |
d28da049 | 907 | } |
8a525303 | 908 | } |
09fb7599 DH |
909 | |
910 | if (SCM_INUMP (n1)) { | |
9a00c9fc | 911 | nn1 = SCM_INUM (n1); |
09fb7599 DH |
912 | if (SCM_INUMP (n2)) { |
913 | long nn2 = SCM_INUM (n2); | |
914 | return SCM_MAKINUM (nn1 ^ nn2); | |
09fb7599 DH |
915 | } else if (SCM_BIGP (n2)) { |
916 | intbig: | |
8a525303 GB |
917 | { |
918 | # ifndef SCM_DIGSTOOBIG | |
09fb7599 DH |
919 | long z = scm_pseudolong (nn1); |
920 | return scm_big_xor ((SCM_BIGDIG *) & z, SCM_DIGSPERLONG, | |
921 | (nn1 < 0) ? SCM_BIGSIGNFLAG : 0, n2); | |
8a525303 | 922 | # else |
09fb7599 DH |
923 | SCM_BIGDIG zdigs [SCM_DIGSPERLONG]; |
924 | scm_longdigs (nn1, zdigs); | |
925 | return scm_big_xor (zdigs, SCM_DIGSPERLONG, | |
926 | (nn1 < 0) ? SCM_BIGSIGNFLAG : 0, n2); | |
8a525303 GB |
927 | # endif |
928 | } | |
09fb7599 DH |
929 | } else { |
930 | SCM_WRONG_TYPE_ARG (SCM_ARG2, n2); | |
931 | } | |
09fb7599 DH |
932 | } else if (SCM_BIGP (n1)) { |
933 | if (SCM_INUMP (n2)) { | |
934 | SCM_SWAP (n1, n2); | |
9a00c9fc | 935 | nn1 = SCM_INUM (n1); |
09fb7599 DH |
936 | goto intbig; |
937 | } else if (SCM_BIGP (n2)) { | |
938 | if (SCM_NUMDIGS(n1) > SCM_NUMDIGS(n2)) { | |
939 | SCM_SWAP (n1, n2); | |
940 | } | |
941 | return scm_big_xor (SCM_BDIGITS (n1), SCM_NUMDIGS (n1), | |
942 | SCM_BIGSIGN (n1), n2); | |
943 | } else { | |
944 | SCM_WRONG_TYPE_ARG (SCM_ARG2, n2); | |
945 | } | |
09fb7599 DH |
946 | } else { |
947 | SCM_WRONG_TYPE_ARG (SCM_ARG1, n1); | |
948 | } | |
0f2d19dd | 949 | } |
1bbd0b84 | 950 | #undef FUNC_NAME |
0f2d19dd | 951 | |
09fb7599 | 952 | |
a1ec6916 | 953 | SCM_DEFINE (scm_logtest, "logtest", 2, 0, 0, |
1bbd0b84 | 954 | (SCM n1, SCM n2), |
b380b885 MD |
955 | "@example\n" |
956 | "(logtest j k) @equiv{} (not (zero? (logand j k)))\n\n" | |
957 | "(logtest #b0100 #b1011) @result{} #f\n" | |
958 | "(logtest #b0100 #b0111) @result{} #t\n" | |
959 | "@end example") | |
1bbd0b84 | 960 | #define FUNC_NAME s_scm_logtest |
0f2d19dd | 961 | { |
9a00c9fc DH |
962 | long int nn1; |
963 | ||
f8de44c1 | 964 | if (SCM_INUMP (n1)) { |
9a00c9fc | 965 | nn1 = SCM_INUM (n1); |
f8de44c1 DH |
966 | if (SCM_INUMP (n2)) { |
967 | long nn2 = SCM_INUM (n2); | |
968 | return SCM_BOOL (nn1 & nn2); | |
f8de44c1 DH |
969 | } else if (SCM_BIGP (n2)) { |
970 | intbig: | |
971 | { | |
8a525303 | 972 | # ifndef SCM_DIGSTOOBIG |
f8de44c1 DH |
973 | long z = scm_pseudolong (nn1); |
974 | return scm_big_test ((SCM_BIGDIG *)&z, SCM_DIGSPERLONG, | |
975 | (nn1 < 0) ? SCM_BIGSIGNFLAG : 0, n2); | |
8a525303 | 976 | # else |
f8de44c1 DH |
977 | SCM_BIGDIG zdigs [SCM_DIGSPERLONG]; |
978 | scm_longdigs (nn1, zdigs); | |
979 | return scm_big_test (zdigs, SCM_DIGSPERLONG, | |
980 | (nn1 < 0) ? SCM_BIGSIGNFLAG : 0, n2); | |
8a525303 | 981 | # endif |
f8de44c1 | 982 | } |
f8de44c1 DH |
983 | } else { |
984 | SCM_WRONG_TYPE_ARG (SCM_ARG2, n2); | |
985 | } | |
f8de44c1 DH |
986 | } else if (SCM_BIGP (n1)) { |
987 | if (SCM_INUMP (n2)) { | |
988 | SCM_SWAP (n1, n2); | |
9a00c9fc | 989 | nn1 = SCM_INUM (n1); |
f8de44c1 DH |
990 | goto intbig; |
991 | } else if (SCM_BIGP (n2)) { | |
992 | if (SCM_NUMDIGS (n1) > SCM_NUMDIGS (n2)) { | |
993 | SCM_SWAP (n1, n2); | |
994 | } | |
995 | return scm_big_test (SCM_BDIGITS (n1), SCM_NUMDIGS (n1), | |
996 | SCM_BIGSIGN (n1), n2); | |
997 | } else { | |
998 | SCM_WRONG_TYPE_ARG (SCM_ARG2, n2); | |
999 | } | |
f8de44c1 DH |
1000 | } else { |
1001 | SCM_WRONG_TYPE_ARG (SCM_ARG1, n1); | |
1002 | } | |
0f2d19dd | 1003 | } |
1bbd0b84 | 1004 | #undef FUNC_NAME |
0f2d19dd | 1005 | |
c1bfcf60 | 1006 | |
a1ec6916 | 1007 | SCM_DEFINE (scm_logbit_p, "logbit?", 2, 0, 0, |
2cd04b42 | 1008 | (SCM index, SCM j), |
b380b885 MD |
1009 | "@example\n" |
1010 | "(logbit? index j) @equiv{} (logtest (integer-expt 2 index) j)\n\n" | |
1011 | "(logbit? 0 #b1101) @result{} #t\n" | |
1012 | "(logbit? 1 #b1101) @result{} #f\n" | |
1013 | "(logbit? 2 #b1101) @result{} #t\n" | |
1014 | "(logbit? 3 #b1101) @result{} #t\n" | |
1015 | "(logbit? 4 #b1101) @result{} #f\n" | |
1016 | "@end example") | |
1bbd0b84 | 1017 | #define FUNC_NAME s_scm_logbit_p |
0f2d19dd | 1018 | { |
78166ad5 DH |
1019 | unsigned long int iindex; |
1020 | ||
1021 | SCM_VALIDATE_INUM_MIN (SCM_ARG1, index, 0); | |
1022 | iindex = (unsigned long int) SCM_INUM (index); | |
1023 | ||
1024 | if (SCM_INUMP (j)) { | |
1025 | return SCM_BOOL ((1L << iindex) & SCM_INUM (j)); | |
1026 | } else if (SCM_BIGP (j)) { | |
1027 | if (SCM_NUMDIGS (j) * SCM_BITSPERDIG < iindex) { | |
1028 | return SCM_BOOL_F; | |
1029 | } else if (SCM_BIGSIGN (j)) { | |
8a525303 GB |
1030 | long num = -1; |
1031 | scm_sizet i = 0; | |
78166ad5 DH |
1032 | SCM_BIGDIG * x = SCM_BDIGITS (j); |
1033 | scm_sizet nx = iindex / SCM_BITSPERDIG; | |
1034 | while (1) { | |
8a525303 | 1035 | num += x[i]; |
78166ad5 DH |
1036 | if (nx == i++) { |
1037 | return SCM_BOOL (((1L << (iindex % SCM_BITSPERDIG)) & num) == 0); | |
1038 | } else if (num < 0) { | |
1039 | num = -1; | |
1040 | } else { | |
1041 | num = 0; | |
1042 | } | |
8a525303 | 1043 | } |
78166ad5 DH |
1044 | } else { |
1045 | return SCM_BOOL (SCM_BDIGITS (j) [iindex / SCM_BITSPERDIG] | |
1046 | & (1L << (iindex % SCM_BITSPERDIG))); | |
8a525303 | 1047 | } |
78166ad5 DH |
1048 | } else { |
1049 | SCM_WRONG_TYPE_ARG (SCM_ARG2, j); | |
8a525303 | 1050 | } |
0f2d19dd | 1051 | } |
1bbd0b84 | 1052 | #undef FUNC_NAME |
0f2d19dd | 1053 | |
78166ad5 | 1054 | |
a1ec6916 | 1055 | SCM_DEFINE (scm_lognot, "lognot", 1, 0, 0, |
1bbd0b84 | 1056 | (SCM n), |
b380b885 MD |
1057 | "Returns the integer which is the 2s-complement of the integer argument.\n\n" |
1058 | "Example:\n" | |
1059 | "@lisp\n" | |
1060 | "(number->string (lognot #b10000000) 2)\n" | |
1061 | " @result{} \"-10000001\"\n" | |
1062 | "(number->string (lognot #b0) 2)\n" | |
1063 | " @result{} \"-1\"\n" | |
1064 | "@end lisp\n" | |
1065 | "") | |
1bbd0b84 | 1066 | #define FUNC_NAME s_scm_lognot |
0f2d19dd | 1067 | { |
f872b822 | 1068 | return scm_difference (SCM_MAKINUM (-1L), n); |
0f2d19dd | 1069 | } |
1bbd0b84 | 1070 | #undef FUNC_NAME |
0f2d19dd | 1071 | |
a1ec6916 | 1072 | SCM_DEFINE (scm_integer_expt, "integer-expt", 2, 0, 0, |
2cd04b42 | 1073 | (SCM n, SCM k), |
b380b885 MD |
1074 | "Returns @var{n} raised to the non-negative integer exponent @var{k}.\n\n" |
1075 | "Example:\n" | |
1076 | "@lisp\n" | |
1077 | "(integer-expt 2 5)\n" | |
1078 | " @result{} 32\n" | |
1079 | "(integer-expt -3 3)\n" | |
1080 | " @result{} -27\n" | |
1081 | "@end lisp") | |
1bbd0b84 | 1082 | #define FUNC_NAME s_scm_integer_expt |
0f2d19dd | 1083 | { |
f872b822 | 1084 | SCM acc = SCM_MAKINUM (1L); |
1bbd0b84 | 1085 | int i2; |
0f2d19dd | 1086 | #ifdef SCM_BIGDIG |
4260a7fc | 1087 | if (SCM_EQ_P (n, SCM_INUM0) || SCM_EQ_P (n, acc)) |
2cd04b42 | 1088 | return n; |
4260a7fc DH |
1089 | else if (SCM_EQ_P (n, SCM_MAKINUM (-1L))) |
1090 | return SCM_FALSEP (scm_even_p (k)) ? n : acc; | |
0f2d19dd | 1091 | #endif |
2cd04b42 | 1092 | SCM_VALIDATE_ULONG_COPY (2,k,i2); |
1bbd0b84 | 1093 | if (i2 < 0) |
f872b822 | 1094 | { |
1bbd0b84 | 1095 | i2 = -i2; |
2cd04b42 | 1096 | n = scm_divide (n, SCM_UNDEFINED); |
f872b822 MD |
1097 | } |
1098 | while (1) | |
1099 | { | |
1bbd0b84 | 1100 | if (0 == i2) |
f872b822 | 1101 | return acc; |
1bbd0b84 | 1102 | if (1 == i2) |
2cd04b42 | 1103 | return scm_product (acc, n); |
1bbd0b84 | 1104 | if (i2 & 1) |
2cd04b42 GB |
1105 | acc = scm_product (acc, n); |
1106 | n = scm_product (n, n); | |
1bbd0b84 | 1107 | i2 >>= 1; |
f872b822 | 1108 | } |
0f2d19dd | 1109 | } |
1bbd0b84 | 1110 | #undef FUNC_NAME |
0f2d19dd | 1111 | |
a1ec6916 | 1112 | SCM_DEFINE (scm_ash, "ash", 2, 0, 0, |
1bbd0b84 | 1113 | (SCM n, SCM cnt), |
3ab9f56e DH |
1114 | "The function ash performs an arithmetic shift left by CNT bits\n" |
1115 | "(or shift right, if CNT is negative). 'Arithmetic' means, that\n" | |
1116 | "the function does not guarantee to keep the bit structure of N,\n" | |
1117 | "but rather guarantees that the result will always be rounded\n" | |
1118 | "towards minus infinity. Therefore, the results of ash and a\n" | |
1119 | "corresponding bitwise shift will differ if N is negative.\n\n" | |
1120 | "Formally, the function returns an integer equivalent to\n" | |
1121 | "@code{(inexact->exact (floor (* N (expt 2 CNT))))}.@refill\n\n" | |
b380b885 MD |
1122 | "Example:\n" |
1123 | "@lisp\n" | |
1124 | "(number->string (ash #b1 3) 2)\n" | |
a3c8b9fc MD |
1125 | " @result{} \"1000\"" |
1126 | "(number->string (ash #b1010 -1) 2)" | |
1127 | " @result{} \"101\"" | |
1128 | "@end lisp") | |
1bbd0b84 | 1129 | #define FUNC_NAME s_scm_ash |
0f2d19dd | 1130 | { |
3ab9f56e DH |
1131 | long bits_to_shift; |
1132 | ||
1133 | #ifndef SCM_BIGDIG | |
1134 | SCM_VALIDATE_INUM (1, n) | |
1135 | #endif | |
1136 | SCM_VALIDATE_INUM (2, cnt); | |
1137 | ||
1138 | bits_to_shift = SCM_INUM (cnt); | |
0f2d19dd | 1139 | #ifdef SCM_BIGDIG |
3ab9f56e DH |
1140 | if (bits_to_shift < 0) { |
1141 | /* Shift right by abs(cnt) bits. This is realized as a division by | |
1142 | div:=2^abs(cnt). However, to guarantee the floor rounding, negative | |
1143 | values require some special treatment. | |
1144 | */ | |
1145 | SCM div = scm_integer_expt (SCM_MAKINUM (2), SCM_MAKINUM (-bits_to_shift)); | |
1146 | if (SCM_FALSEP (scm_negative_p (n))) | |
1147 | return scm_quotient (n, div); | |
1148 | else | |
1149 | return scm_sum (SCM_MAKINUM (-1L), | |
1150 | scm_quotient (scm_sum (SCM_MAKINUM (1L), n), div)); | |
1151 | } else | |
1152 | /* Shift left is done by multiplication with 2^CNT */ | |
f872b822 | 1153 | return scm_product (n, scm_integer_expt (SCM_MAKINUM (2), cnt)); |
0f2d19dd | 1154 | #else |
3ab9f56e DH |
1155 | if (bits_to_shift < 0) |
1156 | /* Signed right shift (SCM_SRS does it right) by abs(cnt) bits. */ | |
1157 | return SCM_MAKINUM (SCM_SRS (SCM_INUM (n), -bits_to_shift)); | |
1158 | else { | |
1159 | /* Shift left, but make sure not to leave the range of inums */ | |
1160 | SCM res = SCM_MAKINUM (SCM_INUM (n) << cnt); | |
1161 | if (SCM_INUM (res) >> cnt != SCM_INUM (n)) | |
1162 | scm_num_overflow (FUNC_NAME); | |
1163 | return res; | |
1164 | } | |
0f2d19dd JB |
1165 | #endif |
1166 | } | |
1bbd0b84 | 1167 | #undef FUNC_NAME |
0f2d19dd | 1168 | |
3c9f20f8 | 1169 | |
a1ec6916 | 1170 | SCM_DEFINE (scm_bit_extract, "bit-extract", 3, 0, 0, |
1bbd0b84 | 1171 | (SCM n, SCM start, SCM end), |
b380b885 MD |
1172 | "Returns the integer composed of the @var{start} (inclusive) through\n" |
1173 | "@var{end} (exclusive) bits of @var{n}. The @var{start}th bit becomes\n" | |
1174 | "the 0-th bit in the result.@refill\n\n" | |
1175 | "Example:\n" | |
1176 | "@lisp\n" | |
1177 | "(number->string (bit-extract #b1101101010 0 4) 2)\n" | |
1178 | " @result{} \"1010\"\n" | |
1179 | "(number->string (bit-extract #b1101101010 4 9) 2)\n" | |
1180 | " @result{} \"10110\"\n" | |
1181 | "@end lisp") | |
1bbd0b84 | 1182 | #define FUNC_NAME s_scm_bit_extract |
0f2d19dd | 1183 | { |
c1bfcf60 | 1184 | int istart, iend; |
c1bfcf60 GB |
1185 | SCM_VALIDATE_INUM_MIN_COPY (2,start,0,istart); |
1186 | SCM_VALIDATE_INUM_MIN_COPY (3, end, 0, iend); | |
1187 | SCM_ASSERT_RANGE (3, end, (iend >= istart)); | |
78166ad5 DH |
1188 | |
1189 | if (SCM_INUMP (n)) { | |
1190 | return SCM_MAKINUM ((SCM_INUM (n) >> istart) & ((1L << (iend - istart)) - 1)); | |
1191 | } else if (SCM_BIGP (n)) { | |
1192 | SCM num1 = SCM_MAKINUM (1L); | |
1193 | SCM num2 = SCM_MAKINUM (2L); | |
1194 | SCM bits = SCM_MAKINUM (iend - istart); | |
1195 | SCM mask = scm_difference (scm_integer_expt (num2, bits), num1); | |
1196 | return scm_logand (mask, scm_ash (n, SCM_MAKINUM (-istart))); | |
1197 | } else { | |
1198 | SCM_WRONG_TYPE_ARG (SCM_ARG1, n); | |
1199 | } | |
0f2d19dd | 1200 | } |
1bbd0b84 | 1201 | #undef FUNC_NAME |
0f2d19dd | 1202 | |
3c9f20f8 | 1203 | |
e4755e5c JB |
1204 | static const char scm_logtab[] = { |
1205 | 0, 1, 1, 2, 1, 2, 2, 3, 1, 2, 2, 3, 2, 3, 3, 4 | |
1206 | }; | |
1cc91f1b | 1207 | |
a1ec6916 | 1208 | SCM_DEFINE (scm_logcount, "logcount", 1, 0, 0, |
1bbd0b84 | 1209 | (SCM n), |
b380b885 MD |
1210 | "Returns the number of bits in integer @var{n}. If integer is positive,\n" |
1211 | "the 1-bits in its binary representation are counted. If negative, the\n" | |
1212 | "0-bits in its two's-complement binary representation are counted. If 0,\n" | |
1213 | "0 is returned.\n\n" | |
1214 | "Example:\n" | |
1215 | "@lisp\n" | |
1216 | "(logcount #b10101010)\n" | |
1217 | " @result{} 4\n" | |
1218 | "(logcount 0)\n" | |
1219 | " @result{} 0\n" | |
1220 | "(logcount -2)\n" | |
1221 | " @result{} 1\n" | |
1222 | "@end lisp") | |
1bbd0b84 | 1223 | #define FUNC_NAME s_scm_logcount |
0f2d19dd | 1224 | { |
3c9f20f8 DH |
1225 | if (SCM_INUMP (n)) { |
1226 | unsigned long int c = 0; | |
1227 | long int nn = SCM_INUM (n); | |
1228 | if (nn < 0) { | |
1229 | nn = -1 - nn; | |
1230 | }; | |
1231 | while (nn) { | |
1232 | c += scm_logtab[15 & nn]; | |
1233 | nn >>= 4; | |
1234 | }; | |
1235 | return SCM_MAKINUM (c); | |
1236 | } else if (SCM_BIGP (n)) { | |
1237 | if (SCM_BIGSIGN (n)) { | |
1238 | return scm_logcount (scm_difference (SCM_MAKINUM (-1L), n)); | |
1239 | } else { | |
1240 | unsigned long int c = 0; | |
1241 | scm_sizet i = SCM_NUMDIGS (n); | |
1242 | SCM_BIGDIG * ds = SCM_BDIGITS (n); | |
1243 | while (i--) { | |
1244 | SCM_BIGDIG d; | |
1245 | for (d = ds[i]; d; d >>= 4) { | |
f872b822 | 1246 | c += scm_logtab[15 & d]; |
3c9f20f8 DH |
1247 | } |
1248 | } | |
f872b822 MD |
1249 | return SCM_MAKINUM (c); |
1250 | } | |
3c9f20f8 DH |
1251 | } else { |
1252 | SCM_WRONG_TYPE_ARG (SCM_ARG1, n); | |
1253 | } | |
0f2d19dd | 1254 | } |
1bbd0b84 GB |
1255 | #undef FUNC_NAME |
1256 | ||
0f2d19dd | 1257 | |
e4755e5c JB |
1258 | static const char scm_ilentab[] = { |
1259 | 0, 1, 2, 2, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, 4, 4 | |
1260 | }; | |
1cc91f1b | 1261 | |
a1ec6916 | 1262 | SCM_DEFINE (scm_integer_length, "integer-length", 1, 0, 0, |
1bbd0b84 | 1263 | (SCM n), |
b380b885 MD |
1264 | "Returns the number of bits neccessary to represent @var{n}.\n\n" |
1265 | "Example:\n" | |
1266 | "@lisp\n" | |
1267 | "(integer-length #b10101010)\n" | |
1268 | " @result{} 8\n" | |
1269 | "(integer-length 0)\n" | |
1270 | " @result{} 0\n" | |
1271 | "(integer-length #b1111)\n" | |
1272 | " @result{} 4\n" | |
1273 | "@end lisp") | |
1bbd0b84 | 1274 | #define FUNC_NAME s_scm_integer_length |
0f2d19dd | 1275 | { |
3c9f20f8 DH |
1276 | if (SCM_INUMP (n)) { |
1277 | unsigned long int c = 0; | |
1278 | unsigned int l = 4; | |
1279 | long int nn = SCM_INUM (n); | |
1280 | if (nn < 0) { | |
1281 | nn = -1 - nn; | |
1282 | }; | |
1283 | while (nn) { | |
f872b822 | 1284 | c += 4; |
3c9f20f8 DH |
1285 | l = scm_ilentab [15 & nn]; |
1286 | nn >>= 4; | |
1287 | }; | |
1288 | return SCM_MAKINUM (c - 4 + l); | |
1289 | } else if (SCM_BIGP (n)) { | |
1290 | if (SCM_BIGSIGN (n)) { | |
1291 | return scm_integer_length (scm_difference (SCM_MAKINUM (-1L), n)); | |
1292 | } else { | |
1293 | unsigned long int digs = SCM_NUMDIGS (n) - 1; | |
1294 | unsigned long int c = digs * SCM_BITSPERDIG; | |
1295 | unsigned int l = 4; | |
1296 | SCM_BIGDIG * ds = SCM_BDIGITS (n); | |
1297 | SCM_BIGDIG d = ds [digs]; | |
1298 | while (d) { | |
1299 | c += 4; | |
1300 | l = scm_ilentab [15 & d]; | |
1301 | d >>= 4; | |
1302 | }; | |
1303 | return SCM_MAKINUM (c - 4 + l); | |
f872b822 | 1304 | } |
3c9f20f8 DH |
1305 | } else { |
1306 | SCM_WRONG_TYPE_ARG (SCM_ARG1, n); | |
1307 | } | |
0f2d19dd | 1308 | } |
1bbd0b84 | 1309 | #undef FUNC_NAME |
0f2d19dd JB |
1310 | |
1311 | ||
1312 | #ifdef SCM_BIGDIG | |
e4755e5c | 1313 | static const char s_bignum[] = "bignum"; |
1cc91f1b | 1314 | |
0f2d19dd | 1315 | SCM |
1bbd0b84 | 1316 | scm_mkbig (scm_sizet nlen, int sign) |
0f2d19dd | 1317 | { |
c209c88e GB |
1318 | SCM v; |
1319 | /* Cast to long int to avoid signed/unsigned comparison warnings. */ | |
f3ae5d60 MD |
1320 | if ((( ((long int) nlen) << SCM_BIGSIZEFIELD) >> SCM_BIGSIZEFIELD) |
1321 | != (long int) nlen) | |
e4755e5c | 1322 | scm_wta (SCM_MAKINUM (nlen), (char *) SCM_NALLOC, s_bignum); |
c209c88e | 1323 | |
f872b822 | 1324 | SCM_NEWCELL (v); |
0f2d19dd | 1325 | SCM_DEFER_INTS; |
f872b822 | 1326 | SCM_SETCHARS (v, scm_must_malloc ((long) (nlen * sizeof (SCM_BIGDIG)), |
e4755e5c | 1327 | s_bignum)); |
f3ae5d60 | 1328 | SCM_SETNUMDIGS (v, nlen, sign); |
0f2d19dd JB |
1329 | SCM_ALLOW_INTS; |
1330 | return v; | |
1331 | } | |
1332 | ||
1cc91f1b | 1333 | |
0f2d19dd | 1334 | SCM |
1bbd0b84 | 1335 | scm_big2inum (SCM b, scm_sizet l) |
0f2d19dd JB |
1336 | { |
1337 | unsigned long num = 0; | |
f872b822 MD |
1338 | SCM_BIGDIG *tmp = SCM_BDIGITS (b); |
1339 | while (l--) | |
1340 | num = SCM_BIGUP (num) + tmp[l]; | |
f3ae5d60 | 1341 | if (!SCM_BIGSIGN (b)) |
f872b822 MD |
1342 | { |
1343 | if (SCM_POSFIXABLE (num)) | |
1344 | return SCM_MAKINUM (num); | |
1345 | } | |
894a712b | 1346 | else if (num <= -SCM_MOST_NEGATIVE_FIXNUM) |
f872b822 | 1347 | return SCM_MAKINUM (-num); |
0f2d19dd JB |
1348 | return b; |
1349 | } | |
1350 | ||
1351 | ||
e4755e5c | 1352 | static const char s_adjbig[] = "scm_adjbig"; |
1cc91f1b | 1353 | |
0f2d19dd | 1354 | SCM |
1bbd0b84 | 1355 | scm_adjbig (SCM b, scm_sizet nlen) |
0f2d19dd | 1356 | { |
2bf746cc | 1357 | scm_sizet nsiz = nlen; |
f3ae5d60 | 1358 | if (((nsiz << SCM_BIGSIZEFIELD) >> SCM_BIGSIZEFIELD) != nlen) |
f872b822 | 1359 | scm_wta (scm_ulong2num (nsiz), (char *) SCM_NALLOC, s_adjbig); |
2bf746cc | 1360 | |
0f2d19dd | 1361 | SCM_DEFER_INTS; |
2bf746cc JB |
1362 | { |
1363 | SCM_BIGDIG *digits | |
1364 | = ((SCM_BIGDIG *) | |
f872b822 MD |
1365 | scm_must_realloc ((char *) SCM_CHARS (b), |
1366 | (long) (SCM_NUMDIGS (b) * sizeof (SCM_BIGDIG)), | |
495ffc6e | 1367 | (long) (nsiz * sizeof (SCM_BIGDIG)), s_bignum)); |
2bf746cc JB |
1368 | |
1369 | SCM_SETCHARS (b, digits); | |
f3ae5d60 | 1370 | SCM_SETNUMDIGS (b, nsiz, SCM_BIGSIGN (b)); |
2bf746cc | 1371 | } |
0f2d19dd JB |
1372 | SCM_ALLOW_INTS; |
1373 | return b; | |
1374 | } | |
1375 | ||
1376 | ||
1cc91f1b | 1377 | |
0f2d19dd | 1378 | SCM |
1bbd0b84 | 1379 | scm_normbig (SCM b) |
0f2d19dd | 1380 | { |
f872b822 MD |
1381 | #ifndef _UNICOS |
1382 | scm_sizet nlen = SCM_NUMDIGS (b); | |
0f2d19dd | 1383 | #else |
f872b822 | 1384 | int nlen = SCM_NUMDIGS (b); /* unsigned nlen breaks on Cray when nlen => 0 */ |
0f2d19dd | 1385 | #endif |
f872b822 MD |
1386 | SCM_BIGDIG *zds = SCM_BDIGITS (b); |
1387 | while (nlen-- && !zds[nlen]); | |
1388 | nlen++; | |
1389 | if (nlen * SCM_BITSPERDIG / SCM_CHAR_BIT <= sizeof (SCM)) | |
1390 | if (SCM_INUMP (b = scm_big2inum (b, (scm_sizet) nlen))) | |
1391 | return b; | |
1392 | if (SCM_NUMDIGS (b) == nlen) | |
1393 | return b; | |
1394 | return scm_adjbig (b, (scm_sizet) nlen); | |
0f2d19dd JB |
1395 | } |
1396 | ||
1397 | ||
1cc91f1b | 1398 | |
0f2d19dd | 1399 | SCM |
1bbd0b84 | 1400 | scm_copybig (SCM b, int sign) |
0f2d19dd | 1401 | { |
f872b822 MD |
1402 | scm_sizet i = SCM_NUMDIGS (b); |
1403 | SCM ans = scm_mkbig (i, sign); | |
1404 | SCM_BIGDIG *src = SCM_BDIGITS (b), *dst = SCM_BDIGITS (ans); | |
1405 | while (i--) | |
1406 | dst[i] = src[i]; | |
0f2d19dd JB |
1407 | return ans; |
1408 | } | |
1409 | ||
1410 | ||
1cc91f1b | 1411 | |
0f2d19dd | 1412 | SCM |
1bbd0b84 | 1413 | scm_long2big (long n) |
0f2d19dd JB |
1414 | { |
1415 | scm_sizet i = 0; | |
1416 | SCM_BIGDIG *digits; | |
f872b822 MD |
1417 | SCM ans = scm_mkbig (SCM_DIGSPERLONG, n < 0); |
1418 | digits = SCM_BDIGITS (ans); | |
1419 | if (n < 0) | |
1420 | n = -n; | |
1421 | while (i < SCM_DIGSPERLONG) | |
1422 | { | |
1423 | digits[i++] = SCM_BIGLO (n); | |
1424 | n = SCM_BIGDN ((unsigned long) n); | |
1425 | } | |
0f2d19dd JB |
1426 | return ans; |
1427 | } | |
1428 | ||
5c11cc9d | 1429 | #ifdef HAVE_LONG_LONGS |
1cc91f1b | 1430 | |
0f2d19dd | 1431 | SCM |
1bbd0b84 | 1432 | scm_long_long2big (long_long n) |
0f2d19dd JB |
1433 | { |
1434 | scm_sizet i; | |
1435 | SCM_BIGDIG *digits; | |
1436 | SCM ans; | |
1437 | int n_digits; | |
1438 | ||
1439 | { | |
1440 | long tn; | |
1441 | tn = (long) n; | |
f872b822 | 1442 | if ((long long) tn == n) |
0f2d19dd JB |
1443 | return scm_long2big (tn); |
1444 | } | |
1445 | ||
1446 | { | |
1447 | long_long tn; | |
1448 | ||
1449 | for (tn = n, n_digits = 0; | |
1450 | tn; | |
f872b822 | 1451 | ++n_digits, tn = SCM_BIGDN ((ulong_long) tn)) |
0f2d19dd JB |
1452 | ; |
1453 | } | |
1454 | ||
1455 | i = 0; | |
f872b822 MD |
1456 | ans = scm_mkbig (n_digits, n < 0); |
1457 | digits = SCM_BDIGITS (ans); | |
0f2d19dd JB |
1458 | if (n < 0) |
1459 | n = -n; | |
f872b822 MD |
1460 | while (i < n_digits) |
1461 | { | |
1462 | digits[i++] = SCM_BIGLO (n); | |
1463 | n = SCM_BIGDN ((ulong_long) n); | |
1464 | } | |
0f2d19dd JB |
1465 | return ans; |
1466 | } | |
1467 | #endif | |
1468 | ||
1cc91f1b | 1469 | |
0f2d19dd | 1470 | SCM |
1bbd0b84 | 1471 | scm_2ulong2big (unsigned long *np) |
0f2d19dd JB |
1472 | { |
1473 | unsigned long n; | |
1474 | scm_sizet i; | |
1475 | SCM_BIGDIG *digits; | |
1476 | SCM ans; | |
1477 | ||
f872b822 MD |
1478 | ans = scm_mkbig (2 * SCM_DIGSPERLONG, 0); |
1479 | digits = SCM_BDIGITS (ans); | |
0f2d19dd JB |
1480 | |
1481 | n = np[0]; | |
1482 | for (i = 0; i < SCM_DIGSPERLONG; ++i) | |
1483 | { | |
f872b822 MD |
1484 | digits[i] = SCM_BIGLO (n); |
1485 | n = SCM_BIGDN ((unsigned long) n); | |
0f2d19dd JB |
1486 | } |
1487 | n = np[1]; | |
1488 | for (i = 0; i < SCM_DIGSPERLONG; ++i) | |
1489 | { | |
f872b822 MD |
1490 | digits[i + SCM_DIGSPERLONG] = SCM_BIGLO (n); |
1491 | n = SCM_BIGDN ((unsigned long) n); | |
0f2d19dd JB |
1492 | } |
1493 | return ans; | |
1494 | } | |
1495 | ||
1496 | ||
1cc91f1b | 1497 | |
0f2d19dd | 1498 | SCM |
1bbd0b84 | 1499 | scm_ulong2big (unsigned long n) |
0f2d19dd JB |
1500 | { |
1501 | scm_sizet i = 0; | |
1502 | SCM_BIGDIG *digits; | |
f872b822 MD |
1503 | SCM ans = scm_mkbig (SCM_DIGSPERLONG, 0); |
1504 | digits = SCM_BDIGITS (ans); | |
1505 | while (i < SCM_DIGSPERLONG) | |
1506 | { | |
1507 | digits[i++] = SCM_BIGLO (n); | |
1508 | n = SCM_BIGDN (n); | |
1509 | } | |
0f2d19dd JB |
1510 | return ans; |
1511 | } | |
1512 | ||
1513 | ||
1cc91f1b | 1514 | |
0f2d19dd | 1515 | int |
1bbd0b84 | 1516 | scm_bigcomp (SCM x, SCM y) |
0f2d19dd | 1517 | { |
f872b822 MD |
1518 | int xsign = SCM_BIGSIGN (x); |
1519 | int ysign = SCM_BIGSIGN (y); | |
0f2d19dd | 1520 | scm_sizet xlen, ylen; |
2bf746cc JB |
1521 | |
1522 | /* Look at the signs, first. */ | |
f872b822 MD |
1523 | if (ysign < xsign) |
1524 | return 1; | |
1525 | if (ysign > xsign) | |
1526 | return -1; | |
2bf746cc JB |
1527 | |
1528 | /* They're the same sign, so see which one has more digits. Note | |
1529 | that, if they are negative, the longer number is the lesser. */ | |
f872b822 MD |
1530 | ylen = SCM_NUMDIGS (y); |
1531 | xlen = SCM_NUMDIGS (x); | |
2bf746cc JB |
1532 | if (ylen > xlen) |
1533 | return (xsign) ? -1 : 1; | |
f872b822 MD |
1534 | if (ylen < xlen) |
1535 | return (xsign) ? 1 : -1; | |
2bf746cc JB |
1536 | |
1537 | /* They have the same number of digits, so find the most significant | |
1538 | digit where they differ. */ | |
1539 | while (xlen) | |
1540 | { | |
1541 | --xlen; | |
1542 | if (SCM_BDIGITS (y)[xlen] != SCM_BDIGITS (x)[xlen]) | |
1543 | /* Make the discrimination based on the digit that differs. */ | |
f872b822 MD |
1544 | return ((SCM_BDIGITS (y)[xlen] > SCM_BDIGITS (x)[xlen]) |
1545 | ? (xsign ? -1 : 1) | |
1546 | : (xsign ? 1 : -1)); | |
2bf746cc JB |
1547 | } |
1548 | ||
1549 | /* The numbers are identical. */ | |
1550 | return 0; | |
0f2d19dd JB |
1551 | } |
1552 | ||
1553 | #ifndef SCM_DIGSTOOBIG | |
1554 | ||
1cc91f1b | 1555 | |
0f2d19dd | 1556 | long |
1bbd0b84 | 1557 | scm_pseudolong (long x) |
0f2d19dd | 1558 | { |
f872b822 MD |
1559 | union |
1560 | { | |
0f2d19dd JB |
1561 | long l; |
1562 | SCM_BIGDIG bd[SCM_DIGSPERLONG]; | |
f872b822 MD |
1563 | } |
1564 | p; | |
0f2d19dd | 1565 | scm_sizet i = 0; |
f872b822 MD |
1566 | if (x < 0) |
1567 | x = -x; | |
1568 | while (i < SCM_DIGSPERLONG) | |
1569 | { | |
1570 | p.bd[i++] = SCM_BIGLO (x); | |
1571 | x = SCM_BIGDN (x); | |
1572 | } | |
0f2d19dd JB |
1573 | /* p.bd[0] = SCM_BIGLO(x); p.bd[1] = SCM_BIGDN(x); */ |
1574 | return p.l; | |
1575 | } | |
1576 | ||
1577 | #else | |
1578 | ||
1cc91f1b | 1579 | |
0f2d19dd | 1580 | void |
1bbd0b84 | 1581 | scm_longdigs (long x, SCM_BIGDIG digs[]) |
0f2d19dd JB |
1582 | { |
1583 | scm_sizet i = 0; | |
f872b822 MD |
1584 | if (x < 0) |
1585 | x = -x; | |
1586 | while (i < SCM_DIGSPERLONG) | |
1587 | { | |
1588 | digs[i++] = SCM_BIGLO (x); | |
1589 | x = SCM_BIGDN (x); | |
1590 | } | |
0f2d19dd JB |
1591 | } |
1592 | #endif | |
1593 | ||
1594 | ||
1cc91f1b | 1595 | |
0f2d19dd | 1596 | SCM |
1bbd0b84 | 1597 | scm_addbig (SCM_BIGDIG *x, scm_sizet nx, int xsgn, SCM bigy, int sgny) |
0f2d19dd JB |
1598 | { |
1599 | /* Assumes nx <= SCM_NUMDIGS(bigy) */ | |
f3ae5d60 | 1600 | /* Assumes xsgn and sgny scm_equal either 0 or SCM_BIGSIGNFLAG */ |
0f2d19dd | 1601 | long num = 0; |
f872b822 MD |
1602 | scm_sizet i = 0, ny = SCM_NUMDIGS (bigy); |
1603 | SCM z = scm_copybig (bigy, SCM_BIGSIGN (bigy) ^ sgny); | |
1604 | SCM_BIGDIG *zds = SCM_BDIGITS (z); | |
1605 | if (xsgn ^ SCM_BIGSIGN (z)) | |
1606 | { | |
1607 | do | |
1608 | { | |
1609 | num += (long) zds[i] - x[i]; | |
1610 | if (num < 0) | |
1611 | { | |
1612 | zds[i] = num + SCM_BIGRAD; | |
1613 | num = -1; | |
1614 | } | |
1615 | else | |
1616 | { | |
1617 | zds[i] = SCM_BIGLO (num); | |
1618 | num = 0; | |
1619 | } | |
1620 | } | |
1621 | while (++i < nx); | |
1622 | if (num && nx == ny) | |
1623 | { | |
1624 | num = 1; | |
1625 | i = 0; | |
4260a7fc | 1626 | SCM_SET_CELL_WORD_0 (z, SCM_CELL_WORD_0 (z) ^ SCM_BIGSIGNFLAG); |
f872b822 MD |
1627 | do |
1628 | { | |
1629 | num += (SCM_BIGRAD - 1) - zds[i]; | |
1630 | zds[i++] = SCM_BIGLO (num); | |
1631 | num = SCM_BIGDN (num); | |
1632 | } | |
1633 | while (i < ny); | |
1634 | } | |
1635 | else | |
1636 | while (i < ny) | |
1637 | { | |
1638 | num += zds[i]; | |
1639 | if (num < 0) | |
1640 | { | |
1641 | zds[i++] = num + SCM_BIGRAD; | |
1642 | num = -1; | |
1643 | } | |
1644 | else | |
1645 | { | |
1646 | zds[i++] = SCM_BIGLO (num); | |
1647 | num = 0; | |
1648 | } | |
1649 | } | |
1650 | } | |
1651 | else | |
1652 | { | |
1653 | do | |
1654 | { | |
1655 | num += (long) zds[i] + x[i]; | |
1656 | zds[i++] = SCM_BIGLO (num); | |
1657 | num = SCM_BIGDN (num); | |
1658 | } | |
1659 | while (i < nx); | |
1660 | if (!num) | |
1661 | return z; | |
1662 | while (i < ny) | |
1663 | { | |
1664 | num += zds[i]; | |
1665 | zds[i++] = SCM_BIGLO (num); | |
1666 | num = SCM_BIGDN (num); | |
1667 | if (!num) | |
1668 | return z; | |
1669 | } | |
1670 | if (num) | |
1671 | { | |
1672 | z = scm_adjbig (z, ny + 1); | |
1673 | SCM_BDIGITS (z)[ny] = num; | |
1674 | return z; | |
1675 | } | |
1676 | } | |
1677 | return scm_normbig (z); | |
0f2d19dd JB |
1678 | } |
1679 | ||
1cc91f1b | 1680 | |
0f2d19dd | 1681 | SCM |
1bbd0b84 | 1682 | scm_mulbig (SCM_BIGDIG *x, scm_sizet nx, SCM_BIGDIG *y, scm_sizet ny, int sgn) |
0f2d19dd JB |
1683 | { |
1684 | scm_sizet i = 0, j = nx + ny; | |
1685 | unsigned long n = 0; | |
f872b822 MD |
1686 | SCM z = scm_mkbig (j, sgn); |
1687 | SCM_BIGDIG *zds = SCM_BDIGITS (z); | |
1688 | while (j--) | |
1689 | zds[j] = 0; | |
1690 | do | |
1691 | { | |
1692 | j = 0; | |
1693 | if (x[i]) | |
1694 | { | |
1695 | do | |
1696 | { | |
1697 | n += zds[i + j] + ((unsigned long) x[i] * y[j]); | |
1698 | zds[i + j++] = SCM_BIGLO (n); | |
1699 | n = SCM_BIGDN (n); | |
1700 | } | |
1701 | while (j < ny); | |
1702 | if (n) | |
1703 | { | |
1704 | zds[i + j] = n; | |
1705 | n = 0; | |
1706 | } | |
1707 | } | |
0f2d19dd | 1708 | } |
f872b822 MD |
1709 | while (++i < nx); |
1710 | return scm_normbig (z); | |
0f2d19dd JB |
1711 | } |
1712 | ||
1cc91f1b | 1713 | |
0f2d19dd | 1714 | unsigned int |
bb628794 | 1715 | scm_divbigdig (SCM_BIGDIG * ds, scm_sizet h, SCM_BIGDIG div) |
0f2d19dd JB |
1716 | { |
1717 | register unsigned long t2 = 0; | |
f872b822 MD |
1718 | while (h--) |
1719 | { | |
1720 | t2 = SCM_BIGUP (t2) + ds[h]; | |
1721 | ds[h] = t2 / div; | |
1722 | t2 %= div; | |
1723 | } | |
0f2d19dd JB |
1724 | return t2; |
1725 | } | |
1726 | ||
1727 | ||
1cc91f1b | 1728 | |
f4c627b3 | 1729 | static SCM |
1bbd0b84 | 1730 | scm_divbigint (SCM x, long z, int sgn, int mode) |
0f2d19dd | 1731 | { |
f872b822 MD |
1732 | if (z < 0) |
1733 | z = -z; | |
1734 | if (z < SCM_BIGRAD) | |
1735 | { | |
1736 | register unsigned long t2 = 0; | |
1737 | register SCM_BIGDIG *ds = SCM_BDIGITS (x); | |
1738 | scm_sizet nd = SCM_NUMDIGS (x); | |
1739 | while (nd--) | |
1740 | t2 = (SCM_BIGUP (t2) + ds[nd]) % z; | |
1741 | if (mode && t2) | |
1742 | t2 = z - t2; | |
1743 | return SCM_MAKINUM (sgn ? -t2 : t2); | |
1744 | } | |
0f2d19dd JB |
1745 | { |
1746 | #ifndef SCM_DIGSTOOBIG | |
f872b822 MD |
1747 | unsigned long t2 = scm_pseudolong (z); |
1748 | return scm_divbigbig (SCM_BDIGITS (x), SCM_NUMDIGS (x), | |
1749 | (SCM_BIGDIG *) & t2, SCM_DIGSPERLONG, | |
1750 | sgn, mode); | |
0f2d19dd JB |
1751 | #else |
1752 | SCM_BIGDIG t2[SCM_DIGSPERLONG]; | |
f872b822 MD |
1753 | scm_longdigs (z, t2); |
1754 | return scm_divbigbig (SCM_BDIGITS (x), SCM_NUMDIGS (x), | |
1755 | t2, SCM_DIGSPERLONG, | |
1756 | sgn, mode); | |
0f2d19dd JB |
1757 | #endif |
1758 | } | |
1759 | } | |
1760 | ||
1cc91f1b | 1761 | |
f4c627b3 | 1762 | static SCM |
1bbd0b84 | 1763 | scm_divbigbig (SCM_BIGDIG *x, scm_sizet nx, SCM_BIGDIG *y, scm_sizet ny, int sgn, int modes) |
0f2d19dd JB |
1764 | { |
1765 | /* modes description | |
f872b822 MD |
1766 | 0 remainder |
1767 | 1 scm_modulo | |
1768 | 2 quotient | |
f4c627b3 | 1769 | 3 quotient but returns SCM_UNDEFINED if division is not exact. */ |
0f2d19dd JB |
1770 | scm_sizet i = 0, j = 0; |
1771 | long num = 0; | |
1772 | unsigned long t2 = 0; | |
1773 | SCM z, newy; | |
f872b822 | 1774 | SCM_BIGDIG d = 0, qhat, *zds, *yds; |
0f2d19dd JB |
1775 | /* algorithm requires nx >= ny */ |
1776 | if (nx < ny) | |
f872b822 MD |
1777 | switch (modes) |
1778 | { | |
1779 | case 0: /* remainder -- just return x */ | |
1780 | z = scm_mkbig (nx, sgn); | |
1781 | zds = SCM_BDIGITS (z); | |
1782 | do | |
1783 | { | |
1784 | zds[i] = x[i]; | |
1785 | } | |
1786 | while (++i < nx); | |
1787 | return z; | |
1788 | case 1: /* scm_modulo -- return y-x */ | |
1789 | z = scm_mkbig (ny, sgn); | |
1790 | zds = SCM_BDIGITS (z); | |
1791 | do | |
1792 | { | |
1793 | num += (long) y[i] - x[i]; | |
1794 | if (num < 0) | |
1795 | { | |
1796 | zds[i] = num + SCM_BIGRAD; | |
1797 | num = -1; | |
1798 | } | |
1799 | else | |
1800 | { | |
1801 | zds[i] = num; | |
1802 | num = 0; | |
1803 | } | |
1804 | } | |
1805 | while (++i < nx); | |
1806 | while (i < ny) | |
1807 | { | |
1808 | num += y[i]; | |
1809 | if (num < 0) | |
1810 | { | |
1811 | zds[i++] = num + SCM_BIGRAD; | |
1812 | num = -1; | |
1813 | } | |
1814 | else | |
1815 | { | |
1816 | zds[i++] = num; | |
1817 | num = 0; | |
1818 | } | |
1819 | } | |
1820 | goto doadj; | |
1821 | case 2: | |
1822 | return SCM_INUM0; /* quotient is zero */ | |
1823 | case 3: | |
f4c627b3 | 1824 | return SCM_UNDEFINED; /* the division is not exact */ |
0f2d19dd | 1825 | } |
f872b822 MD |
1826 | |
1827 | z = scm_mkbig (nx == ny ? nx + 2 : nx + 1, sgn); | |
1828 | zds = SCM_BDIGITS (z); | |
1829 | if (nx == ny) | |
1830 | zds[nx + 1] = 0; | |
1831 | while (!y[ny - 1]) | |
1832 | ny--; /* in case y came in as a psuedolong */ | |
1833 | if (y[ny - 1] < (SCM_BIGRAD >> 1)) | |
1834 | { /* normalize operands */ | |
1835 | d = SCM_BIGRAD / (y[ny - 1] + 1); | |
1836 | newy = scm_mkbig (ny, 0); | |
1837 | yds = SCM_BDIGITS (newy); | |
1838 | while (j < ny) | |
1839 | { | |
1840 | t2 += (unsigned long) y[j] * d; | |
1841 | yds[j++] = SCM_BIGLO (t2); | |
1842 | t2 = SCM_BIGDN (t2); | |
1843 | } | |
1844 | y = yds; | |
1845 | j = 0; | |
1846 | t2 = 0; | |
1847 | while (j < nx) | |
1848 | { | |
1849 | t2 += (unsigned long) x[j] * d; | |
1850 | zds[j++] = SCM_BIGLO (t2); | |
1851 | t2 = SCM_BIGDN (t2); | |
1852 | } | |
1853 | zds[j] = t2; | |
1854 | } | |
1855 | else | |
1856 | { | |
1857 | zds[j = nx] = 0; | |
1858 | while (j--) | |
1859 | zds[j] = x[j]; | |
1860 | } | |
1861 | j = nx == ny ? nx + 1 : nx; /* dividend needs more digits than divisor */ | |
1862 | do | |
1863 | { /* loop over digits of quotient */ | |
1864 | if (zds[j] == y[ny - 1]) | |
1865 | qhat = SCM_BIGRAD - 1; | |
1866 | else | |
1867 | qhat = (SCM_BIGUP (zds[j]) + zds[j - 1]) / y[ny - 1]; | |
1868 | if (!qhat) | |
1869 | continue; | |
1870 | i = 0; | |
1871 | num = 0; | |
1872 | t2 = 0; | |
1873 | do | |
1874 | { /* multiply and subtract */ | |
1875 | t2 += (unsigned long) y[i] * qhat; | |
1876 | num += zds[j - ny + i] - SCM_BIGLO (t2); | |
1877 | if (num < 0) | |
1878 | { | |
1879 | zds[j - ny + i] = num + SCM_BIGRAD; | |
1880 | num = -1; | |
1881 | } | |
1882 | else | |
1883 | { | |
1884 | zds[j - ny + i] = num; | |
1885 | num = 0; | |
1886 | } | |
1887 | t2 = SCM_BIGDN (t2); | |
1888 | } | |
1889 | while (++i < ny); | |
1890 | num += zds[j - ny + i] - t2; /* borrow from high digit; don't update */ | |
1891 | while (num) | |
1892 | { /* "add back" required */ | |
1893 | i = 0; | |
1894 | num = 0; | |
1895 | qhat--; | |
1896 | do | |
1897 | { | |
1898 | num += (long) zds[j - ny + i] + y[i]; | |
1899 | zds[j - ny + i] = SCM_BIGLO (num); | |
1900 | num = SCM_BIGDN (num); | |
1901 | } | |
1902 | while (++i < ny); | |
1903 | num--; | |
1904 | } | |
1905 | if (modes & 2) | |
1906 | zds[j] = qhat; | |
1907 | } | |
1908 | while (--j >= ny); | |
1909 | switch (modes) | |
1910 | { | |
1911 | case 3: /* check that remainder==0 */ | |
1912 | for (j = ny; j && !zds[j - 1]; --j); | |
1913 | if (j) | |
f4c627b3 | 1914 | return SCM_UNDEFINED; |
f872b822 MD |
1915 | case 2: /* move quotient down in z */ |
1916 | j = (nx == ny ? nx + 2 : nx + 1) - ny; | |
1917 | for (i = 0; i < j; i++) | |
1918 | zds[i] = zds[i + ny]; | |
1919 | ny = i; | |
1920 | break; | |
1921 | case 1: /* subtract for scm_modulo */ | |
1922 | i = 0; | |
1923 | num = 0; | |
1924 | j = 0; | |
1925 | do | |
1926 | { | |
1927 | num += y[i] - zds[i]; | |
1928 | j = j | zds[i]; | |
1929 | if (num < 0) | |
1930 | { | |
1931 | zds[i] = num + SCM_BIGRAD; | |
1932 | num = -1; | |
1933 | } | |
1934 | else | |
1935 | { | |
1936 | zds[i] = num; | |
1937 | num = 0; | |
1938 | } | |
1939 | } | |
1940 | while (++i < ny); | |
1941 | if (!j) | |
1942 | return SCM_INUM0; | |
1943 | case 0: /* just normalize remainder */ | |
1944 | if (d) | |
1945 | scm_divbigdig (zds, ny, d); | |
1946 | } | |
0f2d19dd | 1947 | doadj: |
f872b822 MD |
1948 | for (j = ny; j && !zds[j - 1]; --j); |
1949 | if (j * SCM_BITSPERDIG <= sizeof (SCM) * SCM_CHAR_BIT) | |
1950 | if (SCM_INUMP (z = scm_big2inum (z, j))) | |
1951 | return z; | |
1952 | return scm_adjbig (z, j); | |
0f2d19dd JB |
1953 | } |
1954 | #endif | |
f872b822 | 1955 | \f |
0f2d19dd JB |
1956 | |
1957 | ||
1958 | ||
0f2d19dd JB |
1959 | |
1960 | /*** NUMBERS -> STRINGS ***/ | |
0f2d19dd | 1961 | int scm_dblprec; |
e4755e5c | 1962 | static const double fx[] = |
f872b822 MD |
1963 | { 0.0, 5e-1, 5e-2, 5e-3, 5e-4, 5e-5, |
1964 | 5e-6, 5e-7, 5e-8, 5e-9, 5e-10, | |
1965 | 5e-11, 5e-12, 5e-13, 5e-14, 5e-15, | |
1966 | 5e-16, 5e-17, 5e-18, 5e-19, 5e-20}; | |
0f2d19dd JB |
1967 | |
1968 | ||
1969 | ||
1cc91f1b | 1970 | |
0f2d19dd | 1971 | static scm_sizet |
1bbd0b84 | 1972 | idbl2str (double f, char *a) |
0f2d19dd JB |
1973 | { |
1974 | int efmt, dpt, d, i, wp = scm_dblprec; | |
1975 | scm_sizet ch = 0; | |
1976 | int exp = 0; | |
1977 | ||
f872b822 MD |
1978 | if (f == 0.0) |
1979 | goto zero; /*{a[0]='0'; a[1]='.'; a[2]='0'; return 3;} */ | |
1980 | if (f < 0.0) | |
1981 | { | |
1982 | f = -f; | |
1983 | a[ch++] = '-'; | |
1984 | } | |
1985 | else if (f > 0.0); | |
1986 | else | |
1987 | goto funny; | |
1988 | if (IS_INF (f)) | |
1989 | { | |
1990 | if (ch == 0) | |
1991 | a[ch++] = '+'; | |
1992 | funny: | |
1993 | a[ch++] = '#'; | |
1994 | a[ch++] = '.'; | |
1995 | a[ch++] = '#'; | |
1996 | return ch; | |
1997 | } | |
1998 | #ifdef DBL_MIN_10_EXP /* Prevent unnormalized values, as from | |
1999 | make-uniform-vector, from causing infinite loops. */ | |
2000 | while (f < 1.0) | |
2001 | { | |
2002 | f *= 10.0; | |
2003 | if (exp-- < DBL_MIN_10_EXP) | |
2004 | goto funny; | |
2005 | } | |
2006 | while (f > 10.0) | |
2007 | { | |
2008 | f *= 0.10; | |
2009 | if (exp++ > DBL_MAX_10_EXP) | |
2010 | goto funny; | |
2011 | } | |
2012 | #else | |
2013 | while (f < 1.0) | |
2014 | { | |
2015 | f *= 10.0; | |
2016 | exp--; | |
2017 | } | |
2018 | while (f > 10.0) | |
2019 | { | |
2020 | f /= 10.0; | |
2021 | exp++; | |
2022 | } | |
2023 | #endif | |
2024 | if (f + fx[wp] >= 10.0) | |
2025 | { | |
2026 | f = 1.0; | |
2027 | exp++; | |
2028 | } | |
0f2d19dd | 2029 | zero: |
f872b822 MD |
2030 | #ifdef ENGNOT |
2031 | dpt = (exp + 9999) % 3; | |
0f2d19dd JB |
2032 | exp -= dpt++; |
2033 | efmt = 1; | |
f872b822 MD |
2034 | #else |
2035 | efmt = (exp < -3) || (exp > wp + 2); | |
0f2d19dd | 2036 | if (!efmt) |
cda139a7 MD |
2037 | { |
2038 | if (exp < 0) | |
2039 | { | |
2040 | a[ch++] = '0'; | |
2041 | a[ch++] = '.'; | |
2042 | dpt = exp; | |
f872b822 MD |
2043 | while (++dpt) |
2044 | a[ch++] = '0'; | |
cda139a7 MD |
2045 | } |
2046 | else | |
f872b822 | 2047 | dpt = exp + 1; |
cda139a7 | 2048 | } |
0f2d19dd JB |
2049 | else |
2050 | dpt = 1; | |
f872b822 MD |
2051 | #endif |
2052 | ||
2053 | do | |
2054 | { | |
2055 | d = f; | |
2056 | f -= d; | |
2057 | a[ch++] = d + '0'; | |
2058 | if (f < fx[wp]) | |
2059 | break; | |
2060 | if (f + fx[wp] >= 1.0) | |
2061 | { | |
2062 | a[ch - 1]++; | |
2063 | break; | |
2064 | } | |
2065 | f *= 10.0; | |
2066 | if (!(--dpt)) | |
2067 | a[ch++] = '.'; | |
0f2d19dd | 2068 | } |
f872b822 | 2069 | while (wp--); |
0f2d19dd JB |
2070 | |
2071 | if (dpt > 0) | |
cda139a7 | 2072 | { |
f872b822 | 2073 | #ifndef ENGNOT |
cda139a7 MD |
2074 | if ((dpt > 4) && (exp > 6)) |
2075 | { | |
f872b822 | 2076 | d = (a[0] == '-' ? 2 : 1); |
cda139a7 | 2077 | for (i = ch++; i > d; i--) |
f872b822 | 2078 | a[i] = a[i - 1]; |
cda139a7 MD |
2079 | a[d] = '.'; |
2080 | efmt = 1; | |
2081 | } | |
2082 | else | |
f872b822 | 2083 | #endif |
cda139a7 | 2084 | { |
f872b822 MD |
2085 | while (--dpt) |
2086 | a[ch++] = '0'; | |
cda139a7 MD |
2087 | a[ch++] = '.'; |
2088 | } | |
2089 | } | |
f872b822 MD |
2090 | if (a[ch - 1] == '.') |
2091 | a[ch++] = '0'; /* trailing zero */ | |
2092 | if (efmt && exp) | |
2093 | { | |
2094 | a[ch++] = 'e'; | |
2095 | if (exp < 0) | |
2096 | { | |
2097 | exp = -exp; | |
2098 | a[ch++] = '-'; | |
2099 | } | |
2100 | for (i = 10; i <= exp; i *= 10); | |
2101 | for (i /= 10; i; i /= 10) | |
2102 | { | |
2103 | a[ch++] = exp / i + '0'; | |
2104 | exp %= i; | |
2105 | } | |
0f2d19dd | 2106 | } |
0f2d19dd JB |
2107 | return ch; |
2108 | } | |
2109 | ||
1cc91f1b | 2110 | |
0f2d19dd | 2111 | static scm_sizet |
1bbd0b84 | 2112 | iflo2str (SCM flt, char *str) |
0f2d19dd JB |
2113 | { |
2114 | scm_sizet i; | |
f3ae5d60 MD |
2115 | if (SCM_SLOPPY_REALP (flt)) |
2116 | i = idbl2str (SCM_REAL_VALUE (flt), str); | |
0f2d19dd | 2117 | else |
f872b822 | 2118 | { |
f3ae5d60 MD |
2119 | i = idbl2str (SCM_COMPLEX_REAL (flt), str); |
2120 | if (SCM_COMPLEX_IMAG (flt) != 0.0) | |
2121 | { | |
2122 | if (0 <= SCM_COMPLEX_IMAG (flt)) | |
2123 | str[i++] = '+'; | |
2124 | i += idbl2str (SCM_COMPLEX_IMAG (flt), &str[i]); | |
2125 | str[i++] = 'i'; | |
2126 | } | |
f872b822 | 2127 | } |
0f2d19dd JB |
2128 | return i; |
2129 | } | |
0f2d19dd | 2130 | |
5c11cc9d | 2131 | /* convert a long to a string (unterminated). returns the number of |
1bbd0b84 GB |
2132 | characters in the result. |
2133 | rad is output base | |
2134 | p is destination: worst case (base 2) is SCM_INTBUFLEN */ | |
0f2d19dd | 2135 | scm_sizet |
1bbd0b84 | 2136 | scm_iint2str (long num, int rad, char *p) |
0f2d19dd | 2137 | { |
5c11cc9d GH |
2138 | scm_sizet j = 1; |
2139 | scm_sizet i; | |
2140 | unsigned long n = (num < 0) ? -num : num; | |
2141 | ||
f872b822 | 2142 | for (n /= rad; n > 0; n /= rad) |
5c11cc9d GH |
2143 | j++; |
2144 | ||
2145 | i = j; | |
2146 | if (num < 0) | |
f872b822 | 2147 | { |
f872b822 | 2148 | *p++ = '-'; |
5c11cc9d GH |
2149 | j++; |
2150 | n = -num; | |
f872b822 | 2151 | } |
5c11cc9d GH |
2152 | else |
2153 | n = num; | |
f872b822 MD |
2154 | while (i--) |
2155 | { | |
5c11cc9d GH |
2156 | int d = n % rad; |
2157 | ||
f872b822 MD |
2158 | n /= rad; |
2159 | p[i] = d + ((d < 10) ? '0' : 'a' - 10); | |
2160 | } | |
0f2d19dd JB |
2161 | return j; |
2162 | } | |
2163 | ||
2164 | ||
2165 | #ifdef SCM_BIGDIG | |
1cc91f1b | 2166 | |
0f2d19dd | 2167 | static SCM |
1bbd0b84 | 2168 | big2str (SCM b, unsigned int radix) |
0f2d19dd | 2169 | { |
f872b822 MD |
2170 | SCM t = scm_copybig (b, 0); /* sign of temp doesn't matter */ |
2171 | register SCM_BIGDIG *ds = SCM_BDIGITS (t); | |
2172 | scm_sizet i = SCM_NUMDIGS (t); | |
2173 | scm_sizet j = radix == 16 ? (SCM_BITSPERDIG * i) / 4 + 2 | |
2174 | : radix >= 10 ? (SCM_BITSPERDIG * i * 241L) / 800 + 2 | |
2175 | : (SCM_BITSPERDIG * i) + 2; | |
0f2d19dd JB |
2176 | scm_sizet k = 0; |
2177 | scm_sizet radct = 0; | |
2178 | scm_sizet ch; /* jeh */ | |
2179 | SCM_BIGDIG radpow = 1, radmod = 0; | |
f872b822 MD |
2180 | SCM ss = scm_makstr ((long) j, 0); |
2181 | char *s = SCM_CHARS (ss), c; | |
2182 | while ((long) radpow * radix < SCM_BIGRAD) | |
2183 | { | |
2184 | radpow *= radix; | |
2185 | radct++; | |
2186 | } | |
f3ae5d60 | 2187 | s[0] = SCM_BIGSIGN (b) ? '-' : '+'; |
f872b822 MD |
2188 | while ((i || radmod) && j) |
2189 | { | |
2190 | if (k == 0) | |
2191 | { | |
2192 | radmod = (SCM_BIGDIG) scm_divbigdig (ds, i, radpow); | |
2193 | k = radct; | |
2194 | if (!ds[i - 1]) | |
2195 | i--; | |
2196 | } | |
2197 | c = radmod % radix; | |
2198 | radmod /= radix; | |
2199 | k--; | |
2200 | s[--j] = c < 10 ? c + '0' : c + 'a' - 10; | |
2201 | } | |
0f2d19dd | 2202 | ch = s[0] == '-' ? 1 : 0; /* jeh */ |
f872b822 MD |
2203 | if (ch < j) |
2204 | { /* jeh */ | |
2205 | for (i = j; j < SCM_LENGTH (ss); j++) | |
2206 | s[ch + j - i] = s[j]; /* jeh */ | |
2207 | scm_vector_set_length_x (ss, /* jeh */ | |
4260a7fc | 2208 | SCM_MAKINUM (ch + SCM_LENGTH (ss) - i)); |
f872b822 | 2209 | } |
b098016b JB |
2210 | |
2211 | return scm_return_first (ss, t); | |
0f2d19dd JB |
2212 | } |
2213 | #endif | |
2214 | ||
2215 | ||
a1ec6916 | 2216 | SCM_DEFINE (scm_number_to_string, "number->string", 1, 1, 0, |
bb628794 DH |
2217 | (SCM n, SCM radix), |
2218 | "Return a string holding the external representation of the\n" | |
2219 | "number N in the given RADIX. If N is inexact, a radix of 10\n" | |
2220 | "will be used.") | |
1bbd0b84 | 2221 | #define FUNC_NAME s_scm_number_to_string |
0f2d19dd | 2222 | { |
1bbd0b84 | 2223 | int base; |
98cb6e75 DH |
2224 | |
2225 | if (SCM_UNBNDP (radix)) { | |
2226 | base = 10; | |
2227 | } else { | |
2228 | SCM_VALIDATE_INUM (2, radix); | |
2229 | base = SCM_INUM (radix); | |
2230 | SCM_ASSERT_RANGE (2, radix, base >= 2); | |
2231 | } | |
2232 | ||
bb628794 | 2233 | if (SCM_INUMP (n)) { |
98cb6e75 | 2234 | char num_buf [SCM_INTBUFLEN]; |
bb628794 | 2235 | scm_sizet length = scm_iint2str (SCM_INUM (n), base, num_buf); |
98cb6e75 | 2236 | return scm_makfromstr (num_buf, length, 0); |
bb628794 DH |
2237 | } else if (SCM_BIGP (n)) { |
2238 | return big2str (n, (unsigned int) base); | |
2239 | } else if (SCM_INEXACTP (n)) { | |
98cb6e75 | 2240 | char num_buf [SCM_FLOBUFLEN]; |
bb628794 | 2241 | return scm_makfromstr (num_buf, iflo2str (n, num_buf), 0); |
98cb6e75 | 2242 | } else { |
bb628794 | 2243 | SCM_WRONG_TYPE_ARG (1, n); |
0f2d19dd JB |
2244 | } |
2245 | } | |
1bbd0b84 | 2246 | #undef FUNC_NAME |
0f2d19dd JB |
2247 | |
2248 | ||
2249 | /* These print routines are stubbed here so that scm_repl.c doesn't need | |
f3ae5d60 | 2250 | SCM_BIGDIG conditionals */ |
1cc91f1b | 2251 | |
0f2d19dd | 2252 | int |
f3ae5d60 | 2253 | scm_print_real (SCM sexp, SCM port, scm_print_state *pstate) |
0f2d19dd | 2254 | { |
0f2d19dd | 2255 | char num_buf[SCM_FLOBUFLEN]; |
f872b822 | 2256 | scm_lfwrite (num_buf, iflo2str (sexp, num_buf), port); |
0f2d19dd JB |
2257 | return !0; |
2258 | } | |
2259 | ||
f3ae5d60 MD |
2260 | int |
2261 | scm_print_complex (SCM sexp, SCM port, scm_print_state *pstate) | |
2262 | { | |
2263 | char num_buf[SCM_FLOBUFLEN]; | |
2264 | scm_lfwrite (num_buf, iflo2str (sexp, num_buf), port); | |
2265 | return !0; | |
2266 | } | |
1cc91f1b | 2267 | |
0f2d19dd | 2268 | int |
1bbd0b84 | 2269 | scm_bigprint (SCM exp, SCM port, scm_print_state *pstate) |
0f2d19dd JB |
2270 | { |
2271 | #ifdef SCM_BIGDIG | |
f872b822 MD |
2272 | exp = big2str (exp, (unsigned int) 10); |
2273 | scm_lfwrite (SCM_CHARS (exp), (scm_sizet) SCM_LENGTH (exp), port); | |
0f2d19dd | 2274 | #else |
f872b822 | 2275 | scm_ipruk ("bignum", exp, port); |
0f2d19dd JB |
2276 | #endif |
2277 | return !0; | |
2278 | } | |
2279 | /*** END nums->strs ***/ | |
2280 | ||
2281 | /*** STRINGS -> NUMBERS ***/ | |
2a8fecee JB |
2282 | |
2283 | static SCM | |
1bbd0b84 | 2284 | scm_small_istr2int (char *str, long len, long radix) |
2a8fecee JB |
2285 | { |
2286 | register long n = 0, ln; | |
2287 | register int c; | |
2288 | register int i = 0; | |
2289 | int lead_neg = 0; | |
f872b822 MD |
2290 | if (0 >= len) |
2291 | return SCM_BOOL_F; /* zero scm_length */ | |
2292 | switch (*str) | |
2293 | { /* leading sign */ | |
2294 | case '-': | |
2295 | lead_neg = 1; | |
2296 | case '+': | |
2297 | if (++i == len) | |
2298 | return SCM_BOOL_F; /* bad if lone `+' or `-' */ | |
2299 | } | |
2a8fecee | 2300 | |
f872b822 MD |
2301 | do |
2302 | { | |
2303 | switch (c = str[i++]) | |
2304 | { | |
2305 | case DIGITS: | |
2306 | c = c - '0'; | |
2307 | goto accumulate; | |
2308 | case 'A': | |
2309 | case 'B': | |
2310 | case 'C': | |
2311 | case 'D': | |
2312 | case 'E': | |
2313 | case 'F': | |
2314 | c = c - 'A' + 10; | |
2315 | goto accumulate; | |
2316 | case 'a': | |
2317 | case 'b': | |
2318 | case 'c': | |
2319 | case 'd': | |
2320 | case 'e': | |
2321 | case 'f': | |
2322 | c = c - 'a' + 10; | |
2323 | accumulate: | |
2324 | if (c >= radix) | |
2325 | return SCM_BOOL_F; /* bad digit for radix */ | |
2326 | ln = n; | |
2327 | n = n * radix - c; | |
2328 | /* Negation is a workaround for HP700 cc bug */ | |
2329 | if (n > ln || (-n > -SCM_MOST_NEGATIVE_FIXNUM)) | |
2330 | goto ovfl; | |
2331 | break; | |
2332 | default: | |
2333 | return SCM_BOOL_F; /* not a digit */ | |
2334 | } | |
2a8fecee | 2335 | } |
f872b822 MD |
2336 | while (i < len); |
2337 | if (!lead_neg) | |
2338 | if ((n = -n) > SCM_MOST_POSITIVE_FIXNUM) | |
2339 | goto ovfl; | |
2340 | return SCM_MAKINUM (n); | |
2a8fecee JB |
2341 | ovfl: /* overflow scheme integer */ |
2342 | return SCM_BOOL_F; | |
2343 | } | |
2344 | ||
2345 | ||
1cc91f1b | 2346 | |
0f2d19dd | 2347 | SCM |
1bbd0b84 | 2348 | scm_istr2int (char *str, long len, long radix) |
0f2d19dd JB |
2349 | { |
2350 | scm_sizet j; | |
2351 | register scm_sizet k, blen = 1; | |
2352 | scm_sizet i = 0; | |
2353 | int c; | |
2354 | SCM res; | |
2355 | register SCM_BIGDIG *ds; | |
2356 | register unsigned long t2; | |
2357 | ||
f872b822 MD |
2358 | if (0 >= len) |
2359 | return SCM_BOOL_F; /* zero scm_length */ | |
2a8fecee JB |
2360 | |
2361 | /* Short numbers we parse directly into an int, to avoid the overhead | |
2362 | of creating a bignum. */ | |
2363 | if (len < 6) | |
2364 | return scm_small_istr2int (str, len, radix); | |
2365 | ||
f872b822 MD |
2366 | if (16 == radix) |
2367 | j = 1 + (4 * len * sizeof (char)) / (SCM_BITSPERDIG); | |
0f2d19dd | 2368 | else if (10 <= radix) |
f872b822 MD |
2369 | j = 1 + (84 * len * sizeof (char)) / (SCM_BITSPERDIG * 25); |
2370 | else | |
2371 | j = 1 + (len * sizeof (char)) / (SCM_BITSPERDIG); | |
2372 | switch (str[0]) | |
2373 | { /* leading sign */ | |
2374 | case '-': | |
2375 | case '+': | |
2376 | if (++i == (unsigned) len) | |
2377 | return SCM_BOOL_F; /* bad if lone `+' or `-' */ | |
2378 | } | |
2379 | res = scm_mkbig (j, '-' == str[0]); | |
2380 | ds = SCM_BDIGITS (res); | |
2381 | for (k = j; k--;) | |
2382 | ds[k] = 0; | |
2383 | do | |
2384 | { | |
2385 | switch (c = str[i++]) | |
2386 | { | |
2387 | case DIGITS: | |
2388 | c = c - '0'; | |
2389 | goto accumulate; | |
2390 | case 'A': | |
2391 | case 'B': | |
2392 | case 'C': | |
2393 | case 'D': | |
2394 | case 'E': | |
2395 | case 'F': | |
2396 | c = c - 'A' + 10; | |
2397 | goto accumulate; | |
2398 | case 'a': | |
2399 | case 'b': | |
2400 | case 'c': | |
2401 | case 'd': | |
2402 | case 'e': | |
2403 | case 'f': | |
2404 | c = c - 'a' + 10; | |
2405 | accumulate: | |
2406 | if (c >= radix) | |
2407 | return SCM_BOOL_F; /* bad digit for radix */ | |
2408 | k = 0; | |
2409 | t2 = c; | |
2410 | moretodo: | |
2411 | while (k < blen) | |
2412 | { | |
2413 | /* printf ("k = %d, blen = %d, t2 = %ld, ds[k] = %d\n", k, blen, t2, ds[k]); */ | |
2414 | t2 += ds[k] * radix; | |
2415 | ds[k++] = SCM_BIGLO (t2); | |
2416 | t2 = SCM_BIGDN (t2); | |
2417 | } | |
2418 | if (blen > j) | |
2419 | scm_num_overflow ("bignum"); | |
2420 | if (t2) | |
2421 | { | |
2422 | blen++; | |
2423 | goto moretodo; | |
2424 | } | |
2425 | break; | |
2426 | default: | |
2427 | return SCM_BOOL_F; /* not a digit */ | |
2428 | } | |
0f2d19dd | 2429 | } |
f872b822 MD |
2430 | while (i < (unsigned) len); |
2431 | if (blen * SCM_BITSPERDIG / SCM_CHAR_BIT <= sizeof (SCM)) | |
2432 | if (SCM_INUMP (res = scm_big2inum (res, blen))) | |
2433 | return res; | |
2434 | if (j == blen) | |
2435 | return res; | |
2436 | return scm_adjbig (res, blen); | |
0f2d19dd | 2437 | } |
0f2d19dd | 2438 | |
0f2d19dd | 2439 | SCM |
1bbd0b84 | 2440 | scm_istr2flo (char *str, long len, long radix) |
0f2d19dd JB |
2441 | { |
2442 | register int c, i = 0; | |
2443 | double lead_sgn; | |
2444 | double res = 0.0, tmp = 0.0; | |
2445 | int flg = 0; | |
2446 | int point = 0; | |
2447 | SCM second; | |
2448 | ||
f872b822 MD |
2449 | if (i >= len) |
2450 | return SCM_BOOL_F; /* zero scm_length */ | |
0f2d19dd | 2451 | |
f872b822 MD |
2452 | switch (*str) |
2453 | { /* leading sign */ | |
2454 | case '-': | |
2455 | lead_sgn = -1.0; | |
2456 | i++; | |
2457 | break; | |
2458 | case '+': | |
2459 | lead_sgn = 1.0; | |
2460 | i++; | |
0f2d19dd JB |
2461 | break; |
2462 | default: | |
f872b822 | 2463 | lead_sgn = 0.0; |
0f2d19dd | 2464 | } |
f872b822 MD |
2465 | if (i == len) |
2466 | return SCM_BOOL_F; /* bad if lone `+' or `-' */ | |
2467 | ||
2468 | if (str[i] == 'i' || str[i] == 'I') | |
2469 | { /* handle `+i' and `-i' */ | |
2470 | if (lead_sgn == 0.0) | |
2471 | return SCM_BOOL_F; /* must have leading sign */ | |
2472 | if (++i < len) | |
2473 | return SCM_BOOL_F; /* `i' not last character */ | |
f8de44c1 | 2474 | return scm_make_complex (0.0, lead_sgn); |
f872b822 MD |
2475 | } |
2476 | do | |
2477 | { /* check initial digits */ | |
2478 | switch (c = str[i]) | |
2479 | { | |
2480 | case DIGITS: | |
2481 | c = c - '0'; | |
2482 | goto accum1; | |
2483 | case 'D': | |
2484 | case 'E': | |
2485 | case 'F': | |
2486 | if (radix == 10) | |
2487 | goto out1; /* must be exponent */ | |
2488 | case 'A': | |
2489 | case 'B': | |
2490 | case 'C': | |
2491 | c = c - 'A' + 10; | |
2492 | goto accum1; | |
2493 | case 'd': | |
2494 | case 'e': | |
2495 | case 'f': | |
2496 | if (radix == 10) | |
2497 | goto out1; | |
2498 | case 'a': | |
2499 | case 'b': | |
2500 | case 'c': | |
2501 | c = c - 'a' + 10; | |
2502 | accum1: | |
2503 | if (c >= radix) | |
2504 | return SCM_BOOL_F; /* bad digit for radix */ | |
2505 | res = res * radix + c; | |
2506 | flg = 1; /* res is valid */ | |
2507 | break; | |
2508 | default: | |
2509 | goto out1; | |
2510 | } | |
2511 | } | |
2512 | while (++i < len); | |
0f2d19dd JB |
2513 | out1: |
2514 | ||
2515 | /* if true, then we did see a digit above, and res is valid */ | |
f872b822 MD |
2516 | if (i == len) |
2517 | goto done; | |
0f2d19dd JB |
2518 | |
2519 | /* By here, must have seen a digit, | |
2520 | or must have next char be a `.' with radix==10 */ | |
2521 | if (!flg) | |
f872b822 | 2522 | if (!(str[i] == '.' && radix == 10)) |
0f2d19dd JB |
2523 | return SCM_BOOL_F; |
2524 | ||
f872b822 MD |
2525 | while (str[i] == '#') |
2526 | { /* optional sharps */ | |
2527 | res *= radix; | |
2528 | if (++i == len) | |
2529 | goto done; | |
0f2d19dd | 2530 | } |
0f2d19dd | 2531 | |
f872b822 MD |
2532 | if (str[i] == '/') |
2533 | { | |
2534 | while (++i < len) | |
2535 | { | |
2536 | switch (c = str[i]) | |
2537 | { | |
2538 | case DIGITS: | |
2539 | c = c - '0'; | |
2540 | goto accum2; | |
2541 | case 'A': | |
2542 | case 'B': | |
2543 | case 'C': | |
2544 | case 'D': | |
2545 | case 'E': | |
2546 | case 'F': | |
2547 | c = c - 'A' + 10; | |
2548 | goto accum2; | |
2549 | case 'a': | |
2550 | case 'b': | |
2551 | case 'c': | |
2552 | case 'd': | |
2553 | case 'e': | |
2554 | case 'f': | |
2555 | c = c - 'a' + 10; | |
2556 | accum2: | |
2557 | if (c >= radix) | |
2558 | return SCM_BOOL_F; | |
2559 | tmp = tmp * radix + c; | |
2560 | break; | |
2561 | default: | |
2562 | goto out2; | |
2563 | } | |
2564 | } | |
2565 | out2: | |
2566 | if (tmp == 0.0) | |
2567 | return SCM_BOOL_F; /* `slash zero' not allowed */ | |
2568 | if (i < len) | |
2569 | while (str[i] == '#') | |
2570 | { /* optional sharps */ | |
2571 | tmp *= radix; | |
2572 | if (++i == len) | |
2573 | break; | |
2574 | } | |
2575 | res /= tmp; | |
2576 | goto done; | |
0f2d19dd | 2577 | } |
f872b822 MD |
2578 | |
2579 | if (str[i] == '.') | |
2580 | { /* decimal point notation */ | |
2581 | if (radix != 10) | |
2582 | return SCM_BOOL_F; /* must be radix 10 */ | |
2583 | while (++i < len) | |
2584 | { | |
2585 | switch (c = str[i]) | |
2586 | { | |
2587 | case DIGITS: | |
2588 | point--; | |
2589 | res = res * 10.0 + c - '0'; | |
2590 | flg = 1; | |
2591 | break; | |
2592 | default: | |
2593 | goto out3; | |
2594 | } | |
2595 | } | |
2596 | out3: | |
2597 | if (!flg) | |
2598 | return SCM_BOOL_F; /* no digits before or after decimal point */ | |
2599 | if (i == len) | |
2600 | goto adjust; | |
2601 | while (str[i] == '#') | |
2602 | { /* ignore remaining sharps */ | |
2603 | if (++i == len) | |
2604 | goto adjust; | |
2605 | } | |
0f2d19dd | 2606 | } |
0f2d19dd | 2607 | |
f872b822 MD |
2608 | switch (str[i]) |
2609 | { /* exponent */ | |
2610 | case 'd': | |
2611 | case 'D': | |
2612 | case 'e': | |
2613 | case 'E': | |
2614 | case 'f': | |
2615 | case 'F': | |
2616 | case 'l': | |
2617 | case 'L': | |
2618 | case 's': | |
2619 | case 'S': | |
2620 | { | |
2621 | int expsgn = 1, expon = 0; | |
2622 | if (radix != 10) | |
2623 | return SCM_BOOL_F; /* only in radix 10 */ | |
2624 | if (++i == len) | |
2625 | return SCM_BOOL_F; /* bad exponent */ | |
2626 | switch (str[i]) | |
2627 | { | |
2628 | case '-': | |
2629 | expsgn = (-1); | |
2630 | case '+': | |
2631 | if (++i == len) | |
2632 | return SCM_BOOL_F; /* bad exponent */ | |
2633 | } | |
2634 | if (str[i] < '0' || str[i] > '9') | |
2635 | return SCM_BOOL_F; /* bad exponent */ | |
2636 | do | |
2637 | { | |
2638 | switch (c = str[i]) | |
2639 | { | |
2640 | case DIGITS: | |
2641 | expon = expon * 10 + c - '0'; | |
f3ae5d60 | 2642 | if (expon > SCM_MAXEXP) |
f872b822 MD |
2643 | return SCM_BOOL_F; /* exponent too large */ |
2644 | break; | |
2645 | default: | |
2646 | goto out4; | |
2647 | } | |
2648 | } | |
2649 | while (++i < len); | |
2650 | out4: | |
2651 | point += expsgn * expon; | |
0f2d19dd | 2652 | } |
f872b822 | 2653 | } |
0f2d19dd JB |
2654 | |
2655 | adjust: | |
2656 | if (point >= 0) | |
f872b822 MD |
2657 | while (point--) |
2658 | res *= 10.0; | |
0f2d19dd | 2659 | else |
f872b822 MD |
2660 | #ifdef _UNICOS |
2661 | while (point++) | |
2662 | res *= 0.1; | |
2663 | #else | |
2664 | while (point++) | |
2665 | res /= 10.0; | |
2666 | #endif | |
0f2d19dd JB |
2667 | |
2668 | done: | |
2669 | /* at this point, we have a legitimate floating point result */ | |
f872b822 MD |
2670 | if (lead_sgn == -1.0) |
2671 | res = -res; | |
2672 | if (i == len) | |
f8de44c1 | 2673 | return scm_make_real (res); |
f872b822 MD |
2674 | |
2675 | if (str[i] == 'i' || str[i] == 'I') | |
2676 | { /* pure imaginary number */ | |
2677 | if (lead_sgn == 0.0) | |
2678 | return SCM_BOOL_F; /* must have leading sign */ | |
2679 | if (++i < len) | |
2680 | return SCM_BOOL_F; /* `i' not last character */ | |
f8de44c1 | 2681 | return scm_make_complex (0.0, res); |
f872b822 | 2682 | } |
0f2d19dd | 2683 | |
f872b822 MD |
2684 | switch (str[i++]) |
2685 | { | |
2686 | case '-': | |
2687 | lead_sgn = -1.0; | |
2688 | break; | |
2689 | case '+': | |
2690 | lead_sgn = 1.0; | |
2691 | break; | |
2692 | case '@': | |
2693 | { /* polar input for complex number */ | |
2694 | /* get a `real' for scm_angle */ | |
2695 | second = scm_istr2flo (&str[i], (long) (len - i), radix); | |
f3ae5d60 | 2696 | if (!SCM_SLOPPY_INEXACTP (second)) |
f872b822 | 2697 | return SCM_BOOL_F; /* not `real' */ |
f3ae5d60 | 2698 | if (SCM_SLOPPY_COMPLEXP (second)) |
f872b822 | 2699 | return SCM_BOOL_F; /* not `real' */ |
5986c47d | 2700 | tmp = SCM_REAL_VALUE (second); |
f8de44c1 | 2701 | return scm_make_complex (res * cos (tmp), res * sin (tmp)); |
f872b822 MD |
2702 | } |
2703 | default: | |
2704 | return SCM_BOOL_F; | |
2705 | } | |
0f2d19dd JB |
2706 | |
2707 | /* at this point, last char must be `i' */ | |
f872b822 MD |
2708 | if (str[len - 1] != 'i' && str[len - 1] != 'I') |
2709 | return SCM_BOOL_F; | |
0f2d19dd | 2710 | /* handles `x+i' and `x-i' */ |
f872b822 | 2711 | if (i == (len - 1)) |
f8de44c1 | 2712 | return scm_make_complex (res, lead_sgn); |
0f2d19dd | 2713 | /* get a `ureal' for complex part */ |
f872b822 | 2714 | second = scm_istr2flo (&str[i], (long) ((len - i) - 1), radix); |
f3ae5d60 | 2715 | if (!SCM_INEXACTP (second)) |
f872b822 | 2716 | return SCM_BOOL_F; /* not `ureal' */ |
f3ae5d60 | 2717 | if (SCM_SLOPPY_COMPLEXP (second)) |
f872b822 | 2718 | return SCM_BOOL_F; /* not `ureal' */ |
5986c47d | 2719 | tmp = SCM_REAL_VALUE (second); |
f872b822 MD |
2720 | if (tmp < 0.0) |
2721 | return SCM_BOOL_F; /* not `ureal' */ | |
f8de44c1 | 2722 | return scm_make_complex (res, (lead_sgn * tmp)); |
0f2d19dd | 2723 | } |
0f2d19dd JB |
2724 | |
2725 | ||
1cc91f1b | 2726 | |
0f2d19dd | 2727 | SCM |
1bbd0b84 | 2728 | scm_istring2number (char *str, long len, long radix) |
0f2d19dd JB |
2729 | { |
2730 | int i = 0; | |
2731 | char ex = 0; | |
2732 | char ex_p = 0, rx_p = 0; /* Only allow 1 exactness and 1 radix prefix */ | |
2733 | SCM res; | |
f872b822 MD |
2734 | if (len == 1) |
2735 | if (*str == '+' || *str == '-') /* Catches lone `+' and `-' for speed */ | |
0f2d19dd JB |
2736 | return SCM_BOOL_F; |
2737 | ||
f872b822 MD |
2738 | while ((len - i) >= 2 && str[i] == '#' && ++i) |
2739 | switch (str[i++]) | |
2740 | { | |
2741 | case 'b': | |
2742 | case 'B': | |
2743 | if (rx_p++) | |
2744 | return SCM_BOOL_F; | |
2745 | radix = 2; | |
2746 | break; | |
2747 | case 'o': | |
2748 | case 'O': | |
2749 | if (rx_p++) | |
2750 | return SCM_BOOL_F; | |
2751 | radix = 8; | |
2752 | break; | |
2753 | case 'd': | |
2754 | case 'D': | |
2755 | if (rx_p++) | |
2756 | return SCM_BOOL_F; | |
2757 | radix = 10; | |
2758 | break; | |
2759 | case 'x': | |
2760 | case 'X': | |
2761 | if (rx_p++) | |
2762 | return SCM_BOOL_F; | |
2763 | radix = 16; | |
2764 | break; | |
2765 | case 'i': | |
2766 | case 'I': | |
2767 | if (ex_p++) | |
2768 | return SCM_BOOL_F; | |
2769 | ex = 2; | |
2770 | break; | |
2771 | case 'e': | |
2772 | case 'E': | |
2773 | if (ex_p++) | |
2774 | return SCM_BOOL_F; | |
2775 | ex = 1; | |
2776 | break; | |
2777 | default: | |
2778 | return SCM_BOOL_F; | |
2779 | } | |
2780 | ||
2781 | switch (ex) | |
2782 | { | |
2783 | case 1: | |
2784 | return scm_istr2int (&str[i], len - i, radix); | |
2785 | case 0: | |
2786 | res = scm_istr2int (&str[i], len - i, radix); | |
2787 | if (SCM_NFALSEP (res)) | |
2788 | return res; | |
f872b822 MD |
2789 | case 2: |
2790 | return scm_istr2flo (&str[i], len - i, radix); | |
f872b822 | 2791 | } |
0f2d19dd JB |
2792 | return SCM_BOOL_F; |
2793 | } | |
2794 | ||
2795 | ||
a1ec6916 | 2796 | SCM_DEFINE (scm_string_to_number, "string->number", 1, 1, 0, |
bb628794 DH |
2797 | (SCM string, SCM radix), |
2798 | "Returns a number of the maximally precise representation\n" | |
2799 | "expressed by the given STRING. RADIX must be an exact integer,\n" | |
2800 | "either 2, 8, 10, or 16. If supplied, RADIX is a default radix\n" | |
2801 | "that may be overridden by an explicit radix prefix in STRING\n" | |
2802 | "(e.g. \"#o177\"). If RADIX is not supplied, then the default\n" | |
2803 | "radix is 10. If string is not a syntactically valid notation\n" | |
2804 | "for a number, then `string->number' returns #f. (r5rs)") | |
1bbd0b84 | 2805 | #define FUNC_NAME s_scm_string_to_number |
0f2d19dd JB |
2806 | { |
2807 | SCM answer; | |
1bbd0b84 | 2808 | int base; |
bb628794 | 2809 | SCM_VALIDATE_ROSTRING (1,string); |
3b3b36dd | 2810 | SCM_VALIDATE_INUM_MIN_DEF_COPY (2,radix,2,10,base); |
bb628794 DH |
2811 | answer = scm_istring2number (SCM_ROCHARS (string), |
2812 | SCM_ROLENGTH (string), | |
1bbd0b84 | 2813 | base); |
bb628794 | 2814 | return scm_return_first (answer, string); |
0f2d19dd | 2815 | } |
1bbd0b84 | 2816 | #undef FUNC_NAME |
0f2d19dd JB |
2817 | /*** END strs->nums ***/ |
2818 | ||
5986c47d | 2819 | |
0f2d19dd | 2820 | SCM |
f3ae5d60 | 2821 | scm_make_real (double x) |
0f2d19dd JB |
2822 | { |
2823 | SCM z; | |
3a9809df DH |
2824 | SCM_NEWCELL2 (z); |
2825 | SCM_SET_CELL_TYPE (z, scm_tc16_real); | |
2826 | SCM_REAL_VALUE (z) = x; | |
0f2d19dd JB |
2827 | return z; |
2828 | } | |
0f2d19dd | 2829 | |
5986c47d | 2830 | |
f3ae5d60 MD |
2831 | SCM |
2832 | scm_make_complex (double x, double y) | |
2833 | { | |
3a9809df DH |
2834 | if (y == 0.0) { |
2835 | return scm_make_real (x); | |
2836 | } else { | |
2837 | SCM z; | |
2838 | SCM_NEWSMOB (z, scm_tc16_complex, scm_must_malloc (2L * sizeof (double), "complex")); | |
2839 | SCM_COMPLEX_REAL (z) = x; | |
2840 | SCM_COMPLEX_IMAG (z) = y; | |
2841 | return z; | |
2842 | } | |
f3ae5d60 | 2843 | } |
1cc91f1b | 2844 | |
5986c47d | 2845 | |
0f2d19dd | 2846 | SCM |
1bbd0b84 | 2847 | scm_bigequal (SCM x, SCM y) |
0f2d19dd JB |
2848 | { |
2849 | #ifdef SCM_BIGDIG | |
f872b822 MD |
2850 | if (0 == scm_bigcomp (x, y)) |
2851 | return SCM_BOOL_T; | |
0f2d19dd JB |
2852 | #endif |
2853 | return SCM_BOOL_F; | |
2854 | } | |
2855 | ||
0f2d19dd | 2856 | SCM |
f3ae5d60 | 2857 | scm_real_equalp (SCM x, SCM y) |
0f2d19dd | 2858 | { |
f3ae5d60 | 2859 | return SCM_BOOL (SCM_REAL_VALUE (x) == SCM_REAL_VALUE (y)); |
0f2d19dd JB |
2860 | } |
2861 | ||
f3ae5d60 MD |
2862 | SCM |
2863 | scm_complex_equalp (SCM x, SCM y) | |
2864 | { | |
2865 | return SCM_BOOL (SCM_COMPLEX_REAL (x) == SCM_COMPLEX_REAL (y) | |
2866 | && SCM_COMPLEX_IMAG (x) == SCM_COMPLEX_IMAG (y)); | |
2867 | } | |
0f2d19dd JB |
2868 | |
2869 | ||
2870 | ||
1bbd0b84 | 2871 | SCM_REGISTER_PROC (s_number_p, "number?", 1, 0, 0, scm_number_p); |
1cc91f1b | 2872 | |
a1ec6916 | 2873 | SCM_DEFINE (scm_number_p, "complex?", 1, 0, 0, |
1bbd0b84 | 2874 | (SCM x), |
bb628794 DH |
2875 | "Return #t if X is a complex number, #f else. Note that the\n" |
2876 | "sets of real, rational and integer values form subsets of the\n" | |
2877 | "set of complex numbers, i. e. the predicate will also be\n" | |
2878 | "fulfilled if X is a real, rational or integer number.") | |
1bbd0b84 | 2879 | #define FUNC_NAME s_scm_number_p |
0f2d19dd | 2880 | { |
bb628794 | 2881 | return SCM_BOOL (SCM_NUMBERP (x)); |
0f2d19dd | 2882 | } |
1bbd0b84 | 2883 | #undef FUNC_NAME |
0f2d19dd JB |
2884 | |
2885 | ||
1bbd0b84 | 2886 | SCM_REGISTER_PROC (s_real_p, "real?", 1, 0, 0, scm_real_p); |
1cc91f1b | 2887 | |
a1ec6916 | 2888 | SCM_DEFINE (scm_real_p, "rational?", 1, 0, 0, |
1bbd0b84 | 2889 | (SCM x), |
bb628794 DH |
2890 | "Return #t if X is a rational number, #f else. Note that the\n" |
2891 | "set of integer values forms a subset of the set of rational\n" | |
2892 | "numbers, i. e. the predicate will also be fulfilled if X is an\n" | |
2893 | "integer number.") | |
1bbd0b84 | 2894 | #define FUNC_NAME s_scm_real_p |
0f2d19dd | 2895 | { |
bb628794 | 2896 | if (SCM_INUMP (x)) { |
0f2d19dd | 2897 | return SCM_BOOL_T; |
bb628794 | 2898 | } else if (SCM_IMP (x)) { |
0f2d19dd | 2899 | return SCM_BOOL_F; |
bb628794 | 2900 | } else if (SCM_SLOPPY_REALP (x)) { |
0f2d19dd | 2901 | return SCM_BOOL_T; |
bb628794 | 2902 | } else if (SCM_BIGP (x)) { |
0f2d19dd | 2903 | return SCM_BOOL_T; |
bb628794 DH |
2904 | } else { |
2905 | return SCM_BOOL_F; | |
2906 | } | |
0f2d19dd | 2907 | } |
1bbd0b84 | 2908 | #undef FUNC_NAME |
0f2d19dd JB |
2909 | |
2910 | ||
a1ec6916 | 2911 | SCM_DEFINE (scm_integer_p, "integer?", 1, 0, 0, |
1bbd0b84 | 2912 | (SCM x), |
bb628794 | 2913 | "Return #t if X is an integer number, #f else.") |
1bbd0b84 | 2914 | #define FUNC_NAME s_scm_integer_p |
0f2d19dd JB |
2915 | { |
2916 | double r; | |
f872b822 MD |
2917 | if (SCM_INUMP (x)) |
2918 | return SCM_BOOL_T; | |
2919 | if (SCM_IMP (x)) | |
2920 | return SCM_BOOL_F; | |
f872b822 MD |
2921 | if (SCM_BIGP (x)) |
2922 | return SCM_BOOL_T; | |
f3ae5d60 | 2923 | if (!SCM_SLOPPY_INEXACTP (x)) |
f872b822 | 2924 | return SCM_BOOL_F; |
f3ae5d60 | 2925 | if (SCM_SLOPPY_COMPLEXP (x)) |
f872b822 | 2926 | return SCM_BOOL_F; |
5986c47d | 2927 | r = SCM_REAL_VALUE (x); |
f872b822 MD |
2928 | if (r == floor (r)) |
2929 | return SCM_BOOL_T; | |
0f2d19dd JB |
2930 | return SCM_BOOL_F; |
2931 | } | |
1bbd0b84 | 2932 | #undef FUNC_NAME |
0f2d19dd JB |
2933 | |
2934 | ||
a1ec6916 | 2935 | SCM_DEFINE (scm_inexact_p, "inexact?", 1, 0, 0, |
1bbd0b84 | 2936 | (SCM x), |
bb628794 | 2937 | "Return #t if X is an inexact number, #f else.") |
1bbd0b84 | 2938 | #define FUNC_NAME s_scm_inexact_p |
0f2d19dd | 2939 | { |
f4c627b3 | 2940 | return SCM_BOOL (SCM_INEXACTP (x)); |
0f2d19dd | 2941 | } |
1bbd0b84 | 2942 | #undef FUNC_NAME |
0f2d19dd JB |
2943 | |
2944 | ||
152f82bf | 2945 | SCM_GPROC1 (s_eq_p, "=", scm_tc7_rpsubr, scm_num_eq_p, g_eq_p); |
1cc91f1b | 2946 | |
0f2d19dd | 2947 | SCM |
6e8d25a6 | 2948 | scm_num_eq_p (SCM x, SCM y) |
0f2d19dd | 2949 | { |
f4c627b3 DH |
2950 | if (SCM_INUMP (x)) { |
2951 | long xx = SCM_INUM (x); | |
2952 | if (SCM_INUMP (y)) { | |
2953 | long yy = SCM_INUM (y); | |
2954 | return SCM_BOOL (xx == yy); | |
2955 | } else if (SCM_BIGP (y)) { | |
2956 | return SCM_BOOL_F; | |
2957 | } else if (SCM_REALP (y)) { | |
2958 | return SCM_BOOL ((double) xx == SCM_REAL_VALUE (y)); | |
2959 | } else if (SCM_COMPLEXP (y)) { | |
2960 | return SCM_BOOL (((double) xx == SCM_COMPLEX_REAL (y)) | |
2961 | && (0.0 == SCM_COMPLEX_IMAG (y))); | |
2962 | } else { | |
2963 | SCM_WTA_DISPATCH_2 (g_eq_p, x, y, SCM_ARGn, s_eq_p); | |
f872b822 | 2964 | } |
f4c627b3 DH |
2965 | } else if (SCM_BIGP (x)) { |
2966 | if (SCM_INUMP (y)) { | |
2967 | return SCM_BOOL_F; | |
2968 | } else if (SCM_BIGP (y)) { | |
2969 | return SCM_BOOL (0 == scm_bigcomp (x, y)); | |
2970 | } else if (SCM_REALP (y)) { | |
2971 | return SCM_BOOL (scm_big2dbl (x) == SCM_REAL_VALUE (y)); | |
2972 | } else if (SCM_COMPLEXP (y)) { | |
2973 | return SCM_BOOL ((scm_big2dbl (x) == SCM_COMPLEX_REAL (y)) | |
2974 | && (0.0 == SCM_COMPLEX_IMAG (y))); | |
2975 | } else { | |
2976 | SCM_WTA_DISPATCH_2 (g_eq_p, x, y, SCM_ARGn, s_eq_p); | |
2977 | } | |
2978 | } else if (SCM_REALP (x)) { | |
2979 | if (SCM_INUMP (y)) { | |
2980 | return SCM_BOOL (SCM_REAL_VALUE (x) == (double) SCM_INUM (y)); | |
2981 | } else if (SCM_BIGP (y)) { | |
2982 | return SCM_BOOL (SCM_REAL_VALUE (x) == scm_big2dbl (y)); | |
2983 | } else if (SCM_REALP (y)) { | |
2984 | return SCM_BOOL (SCM_REAL_VALUE (x) == SCM_REAL_VALUE (y)); | |
2985 | } else if (SCM_COMPLEXP (y)) { | |
2986 | return SCM_BOOL ((SCM_REAL_VALUE (x) == SCM_COMPLEX_REAL (y)) | |
2987 | && (0.0 == SCM_COMPLEX_IMAG (y))); | |
2988 | } else { | |
2989 | SCM_WTA_DISPATCH_2 (g_eq_p, x, y, SCM_ARGn, s_eq_p); | |
f872b822 | 2990 | } |
f4c627b3 DH |
2991 | } else if (SCM_COMPLEXP (x)) { |
2992 | if (SCM_INUMP (y)) { | |
2993 | return SCM_BOOL ((SCM_COMPLEX_REAL (x) == (double) SCM_INUM (y)) | |
2994 | && (SCM_COMPLEX_IMAG (x) == 0.0)); | |
2995 | } else if (SCM_BIGP (y)) { | |
2996 | return SCM_BOOL ((SCM_COMPLEX_REAL (x) == scm_big2dbl (y)) | |
2997 | && (SCM_COMPLEX_IMAG (x) == 0.0)); | |
2998 | } else if (SCM_REALP (y)) { | |
2999 | return SCM_BOOL ((SCM_COMPLEX_REAL (x) == SCM_REAL_VALUE (y)) | |
3000 | && (SCM_COMPLEX_IMAG (x) == 0.0)); | |
3001 | } else if (SCM_COMPLEXP (y)) { | |
3002 | return SCM_BOOL ((SCM_COMPLEX_REAL (x) == SCM_COMPLEX_REAL (y)) | |
3003 | && (SCM_COMPLEX_IMAG (x) == SCM_COMPLEX_IMAG (y))); | |
3004 | } else { | |
3005 | SCM_WTA_DISPATCH_2 (g_eq_p, x, y, SCM_ARGn, s_eq_p); | |
3006 | } | |
3007 | } else { | |
3008 | SCM_WTA_DISPATCH_2 (g_eq_p, x, y, SCM_ARG1, s_eq_p); | |
3009 | } | |
0f2d19dd JB |
3010 | } |
3011 | ||
3012 | ||
152f82bf | 3013 | SCM_GPROC1 (s_less_p, "<", scm_tc7_rpsubr, scm_less_p, g_less_p); |
1cc91f1b | 3014 | |
0f2d19dd | 3015 | SCM |
6e8d25a6 | 3016 | scm_less_p (SCM x, SCM y) |
0f2d19dd | 3017 | { |
f4c627b3 DH |
3018 | if (SCM_INUMP (x)) { |
3019 | long xx = SCM_INUM (x); | |
3020 | if (SCM_INUMP (y)) { | |
3021 | long yy = SCM_INUM (y); | |
3022 | return SCM_BOOL (xx < yy); | |
3023 | } else if (SCM_BIGP (y)) { | |
3024 | return SCM_BOOL (!SCM_BIGSIGN (y)); | |
3025 | } else if (SCM_REALP (y)) { | |
3026 | return SCM_BOOL ((double) xx < SCM_REAL_VALUE (y)); | |
3027 | } else { | |
3028 | SCM_WTA_DISPATCH_2 (g_less_p, x, y, SCM_ARGn, s_less_p); | |
f872b822 | 3029 | } |
f4c627b3 DH |
3030 | } else if (SCM_BIGP (x)) { |
3031 | if (SCM_INUMP (y)) { | |
3032 | return SCM_BOOL (SCM_BIGSIGN (x)); | |
3033 | } else if (SCM_BIGP (y)) { | |
3034 | return SCM_BOOL (1 == scm_bigcomp (x, y)); | |
3035 | } else if (SCM_REALP (y)) { | |
3036 | return SCM_BOOL (scm_big2dbl (x) < SCM_REAL_VALUE (y)); | |
3037 | } else { | |
3038 | SCM_WTA_DISPATCH_2 (g_less_p, x, y, SCM_ARGn, s_less_p); | |
3039 | } | |
3040 | } else if (SCM_REALP (x)) { | |
3041 | if (SCM_INUMP (y)) { | |
3042 | return SCM_BOOL (SCM_REAL_VALUE (x) < (double) SCM_INUM (y)); | |
3043 | } else if (SCM_BIGP (y)) { | |
3044 | return SCM_BOOL (SCM_REAL_VALUE (x) < scm_big2dbl (y)); | |
3045 | } else if (SCM_REALP (y)) { | |
3046 | return SCM_BOOL (SCM_REAL_VALUE (x) < SCM_REAL_VALUE (y)); | |
3047 | } else { | |
3048 | SCM_WTA_DISPATCH_2 (g_less_p, x, y, SCM_ARGn, s_less_p); | |
f872b822 | 3049 | } |
f4c627b3 DH |
3050 | } else { |
3051 | SCM_WTA_DISPATCH_2 (g_less_p, x, y, SCM_ARG1, s_less_p); | |
3052 | } | |
0f2d19dd JB |
3053 | } |
3054 | ||
3055 | ||
c3ee7520 | 3056 | SCM_DEFINE1 (scm_gr_p, ">", scm_tc7_rpsubr, |
1bbd0b84 | 3057 | (SCM x, SCM y), |
bb628794 DH |
3058 | "Return #t if the list of parameters is monotonically\n" |
3059 | "increasing.") | |
1bbd0b84 | 3060 | #define FUNC_NAME s_scm_gr_p |
0f2d19dd | 3061 | { |
f872b822 | 3062 | return scm_less_p (y, x); |
0f2d19dd | 3063 | } |
1bbd0b84 | 3064 | #undef FUNC_NAME |
0f2d19dd JB |
3065 | |
3066 | ||
c3ee7520 | 3067 | SCM_DEFINE1 (scm_leq_p, "<=", scm_tc7_rpsubr, |
1bbd0b84 | 3068 | (SCM x, SCM y), |
bb628794 DH |
3069 | "Return #t if the list of parameters is monotonically\n" |
3070 | "non-decreasing.") | |
1bbd0b84 | 3071 | #define FUNC_NAME s_scm_leq_p |
0f2d19dd | 3072 | { |
f872b822 | 3073 | return SCM_BOOL_NOT (scm_less_p (y, x)); |
0f2d19dd | 3074 | } |
1bbd0b84 | 3075 | #undef FUNC_NAME |
0f2d19dd JB |
3076 | |
3077 | ||
c3ee7520 | 3078 | SCM_DEFINE1 (scm_geq_p, ">=", scm_tc7_rpsubr, |
1bbd0b84 | 3079 | (SCM x, SCM y), |
bb628794 DH |
3080 | "Return #t if the list of parameters is monotonically\n" |
3081 | "non-increasing.") | |
1bbd0b84 | 3082 | #define FUNC_NAME s_scm_geq_p |
0f2d19dd | 3083 | { |
f872b822 | 3084 | return SCM_BOOL_NOT (scm_less_p (x, y)); |
0f2d19dd | 3085 | } |
1bbd0b84 | 3086 | #undef FUNC_NAME |
0f2d19dd JB |
3087 | |
3088 | ||
152f82bf | 3089 | SCM_GPROC (s_zero_p, "zero?", 1, 0, 0, scm_zero_p, g_zero_p); |
1cc91f1b | 3090 | |
0f2d19dd | 3091 | SCM |
6e8d25a6 | 3092 | scm_zero_p (SCM z) |
0f2d19dd | 3093 | { |
c2ff8ab0 DH |
3094 | if (SCM_INUMP (z)) { |
3095 | return SCM_BOOL (SCM_EQ_P (z, SCM_INUM0)); | |
3096 | } else if (SCM_BIGP (z)) { | |
3097 | return SCM_BOOL_F; | |
3098 | } else if (SCM_REALP (z)) { | |
3099 | return SCM_BOOL (SCM_REAL_VALUE (z) == 0.0); | |
3100 | } else if (SCM_COMPLEXP (z)) { | |
3101 | return SCM_BOOL (SCM_COMPLEX_REAL (z) == 0.0 | |
3102 | && SCM_COMPLEX_IMAG (z) == 0.0); | |
3103 | } else { | |
3104 | SCM_WTA_DISPATCH_1 (g_zero_p, z, SCM_ARG1, s_zero_p); | |
3105 | } | |
0f2d19dd JB |
3106 | } |
3107 | ||
3108 | ||
152f82bf | 3109 | SCM_GPROC (s_positive_p, "positive?", 1, 0, 0, scm_positive_p, g_positive_p); |
1cc91f1b | 3110 | |
0f2d19dd | 3111 | SCM |
6e8d25a6 | 3112 | scm_positive_p (SCM x) |
0f2d19dd | 3113 | { |
c2ff8ab0 DH |
3114 | if (SCM_INUMP (x)) { |
3115 | return SCM_BOOL (SCM_INUM (x) > 0); | |
3116 | } else if (SCM_BIGP (x)) { | |
3117 | return SCM_BOOL (!SCM_BIGSIGN (x)); | |
3118 | } else if (SCM_REALP (x)) { | |
3119 | return SCM_BOOL(SCM_REAL_VALUE (x) > 0.0); | |
3120 | } else { | |
3121 | SCM_WTA_DISPATCH_1 (g_positive_p, x, SCM_ARG1, s_positive_p); | |
3122 | } | |
0f2d19dd JB |
3123 | } |
3124 | ||
3125 | ||
152f82bf | 3126 | SCM_GPROC (s_negative_p, "negative?", 1, 0, 0, scm_negative_p, g_negative_p); |
1cc91f1b | 3127 | |
0f2d19dd | 3128 | SCM |
6e8d25a6 | 3129 | scm_negative_p (SCM x) |
0f2d19dd | 3130 | { |
c2ff8ab0 DH |
3131 | if (SCM_INUMP (x)) { |
3132 | return SCM_BOOL (SCM_INUM (x) < 0); | |
3133 | } else if (SCM_BIGP (x)) { | |
3134 | return SCM_BOOL (SCM_BIGSIGN (x)); | |
3135 | } else if (SCM_REALP (x)) { | |
3136 | return SCM_BOOL(SCM_REAL_VALUE (x) < 0.0); | |
3137 | } else { | |
3138 | SCM_WTA_DISPATCH_1 (g_negative_p, x, SCM_ARG1, s_negative_p); | |
3139 | } | |
0f2d19dd JB |
3140 | } |
3141 | ||
3142 | ||
9de33deb | 3143 | SCM_GPROC1 (s_max, "max", scm_tc7_asubr, scm_max, g_max); |
1cc91f1b | 3144 | |
0f2d19dd | 3145 | SCM |
6e8d25a6 | 3146 | scm_max (SCM x, SCM y) |
0f2d19dd | 3147 | { |
f4c627b3 DH |
3148 | if (SCM_UNBNDP (y)) { |
3149 | if (SCM_UNBNDP (x)) { | |
3150 | SCM_WTA_DISPATCH_0 (g_max, x, SCM_ARG1, s_max); | |
3151 | } else if (SCM_NUMBERP (x)) { | |
f872b822 | 3152 | return x; |
f4c627b3 DH |
3153 | } else { |
3154 | SCM_WTA_DISPATCH_1 (g_max, x, SCM_ARG1, s_max); | |
f872b822 | 3155 | } |
f4c627b3 DH |
3156 | } |
3157 | ||
3158 | if (SCM_INUMP (x)) { | |
3159 | long xx = SCM_INUM (x); | |
3160 | if (SCM_INUMP (y)) { | |
3161 | long yy = SCM_INUM (y); | |
3162 | return (xx < yy) ? y : x; | |
3163 | } else if (SCM_BIGP (y)) { | |
3164 | return SCM_BIGSIGN (y) ? x : y; | |
3165 | } else if (SCM_REALP (y)) { | |
3166 | double z = xx; | |
3167 | return (z <= SCM_REAL_VALUE (y)) ? y : scm_make_real (z); | |
3168 | } else { | |
3169 | SCM_WTA_DISPATCH_2 (g_max, x, y, SCM_ARGn, s_max); | |
f872b822 | 3170 | } |
f4c627b3 DH |
3171 | } else if (SCM_BIGP (x)) { |
3172 | if (SCM_INUMP (y)) { | |
3173 | return SCM_BIGSIGN (x) ? y : x; | |
3174 | } else if (SCM_BIGP (y)) { | |
3175 | return (1 == scm_bigcomp (x, y)) ? y : x; | |
3176 | } else if (SCM_REALP (y)) { | |
3177 | double z = scm_big2dbl (x); | |
3178 | return (z <= SCM_REAL_VALUE (y)) ? y : scm_make_real (z); | |
3179 | } else { | |
3180 | SCM_WTA_DISPATCH_2 (g_max, x, y, SCM_ARGn, s_max); | |
3181 | } | |
3182 | } else if (SCM_REALP (x)) { | |
3183 | if (SCM_INUMP (y)) { | |
3184 | double z = SCM_INUM (y); | |
3185 | return (SCM_REAL_VALUE (x) < z) ? scm_make_real (z) : x; | |
3186 | } else if (SCM_BIGP (y)) { | |
3187 | double z = scm_big2dbl (y); | |
3188 | return (SCM_REAL_VALUE (x) < z) ? scm_make_real (z) : x; | |
3189 | } else if (SCM_REALP (y)) { | |
3190 | return (SCM_REAL_VALUE (x) < SCM_REAL_VALUE (y)) ? y : x; | |
3191 | } else { | |
3192 | SCM_WTA_DISPATCH_2 (g_max, x, y, SCM_ARGn, s_max); | |
f872b822 | 3193 | } |
f4c627b3 DH |
3194 | } else { |
3195 | SCM_WTA_DISPATCH_2 (g_max, x, y, SCM_ARG1, s_max); | |
3196 | } | |
0f2d19dd JB |
3197 | } |
3198 | ||
3199 | ||
9de33deb | 3200 | SCM_GPROC1 (s_min, "min", scm_tc7_asubr, scm_min, g_min); |
1cc91f1b | 3201 | |
0f2d19dd | 3202 | SCM |
6e8d25a6 | 3203 | scm_min (SCM x, SCM y) |
0f2d19dd | 3204 | { |
f4c627b3 DH |
3205 | if (SCM_UNBNDP (y)) { |
3206 | if (SCM_UNBNDP (x)) { | |
3207 | SCM_WTA_DISPATCH_0 (g_min, x, SCM_ARG1, s_min); | |
3208 | } else if (SCM_NUMBERP (x)) { | |
f872b822 | 3209 | return x; |
f4c627b3 DH |
3210 | } else { |
3211 | SCM_WTA_DISPATCH_1 (g_min, x, SCM_ARG1, s_min); | |
f872b822 | 3212 | } |
f4c627b3 DH |
3213 | } |
3214 | ||
3215 | if (SCM_INUMP (x)) { | |
3216 | long xx = SCM_INUM (x); | |
3217 | if (SCM_INUMP (y)) { | |
3218 | long yy = SCM_INUM (y); | |
3219 | return (xx < yy) ? x : y; | |
3220 | } else if (SCM_BIGP (y)) { | |
3221 | return SCM_BIGSIGN (y) ? y : x; | |
3222 | } else if (SCM_REALP (y)) { | |
3223 | double z = xx; | |
3224 | return (z < SCM_REAL_VALUE (y)) ? scm_make_real (z) : y; | |
3225 | } else { | |
3226 | SCM_WTA_DISPATCH_2 (g_min, x, y, SCM_ARGn, s_min); | |
f872b822 | 3227 | } |
f4c627b3 DH |
3228 | } else if (SCM_BIGP (x)) { |
3229 | if (SCM_INUMP (y)) { | |
3230 | return SCM_BIGSIGN (x) ? x : y; | |
3231 | } else if (SCM_BIGP (y)) { | |
3232 | return (-1 == scm_bigcomp (x, y)) ? y : x; | |
3233 | } else if (SCM_REALP (y)) { | |
3234 | double z = scm_big2dbl (x); | |
3235 | return (z < SCM_REAL_VALUE (y)) ? scm_make_real (z) : y; | |
3236 | } else { | |
3237 | SCM_WTA_DISPATCH_2 (g_min, x, y, SCM_ARGn, s_min); | |
3238 | } | |
3239 | } else if (SCM_REALP (x)) { | |
3240 | if (SCM_INUMP (y)) { | |
3241 | double z = SCM_INUM (y); | |
3242 | return (SCM_REAL_VALUE (x) <= z) ? x : scm_make_real (z); | |
3243 | } else if (SCM_BIGP (y)) { | |
3244 | double z = scm_big2dbl (y); | |
3245 | return (SCM_REAL_VALUE (x) <= z) ? x : scm_make_real (z); | |
3246 | } else if (SCM_REALP (y)) { | |
3247 | return (SCM_REAL_VALUE (x) < SCM_REAL_VALUE (y)) ? x : y; | |
3248 | } else { | |
3249 | SCM_WTA_DISPATCH_2 (g_min, x, y, SCM_ARGn, s_min); | |
f872b822 | 3250 | } |
f4c627b3 DH |
3251 | } else { |
3252 | SCM_WTA_DISPATCH_2 (g_min, x, y, SCM_ARG1, s_min); | |
3253 | } | |
0f2d19dd JB |
3254 | } |
3255 | ||
3256 | ||
9de33deb | 3257 | SCM_GPROC1 (s_sum, "+", scm_tc7_asubr, scm_sum, g_sum); |
1cc91f1b | 3258 | |
0f2d19dd | 3259 | SCM |
6e8d25a6 | 3260 | scm_sum (SCM x, SCM y) |
0f2d19dd | 3261 | { |
98cb6e75 DH |
3262 | if (SCM_UNBNDP (y)) { |
3263 | if (SCM_UNBNDP (x)) { | |
3264 | return SCM_INUM0; | |
3265 | } else if (SCM_NUMBERP (x)) { | |
f872b822 | 3266 | return x; |
98cb6e75 DH |
3267 | } else { |
3268 | SCM_WTA_DISPATCH_1 (g_sum, x, SCM_ARG1, s_sum); | |
f872b822 | 3269 | } |
98cb6e75 | 3270 | } |
c209c88e | 3271 | |
98cb6e75 DH |
3272 | if (SCM_INUMP (x)) { |
3273 | long int xx = SCM_INUM (x); | |
3274 | if (SCM_INUMP (y)) { | |
3275 | long int yy = SCM_INUM (y); | |
3276 | long int z = xx + yy; | |
3277 | if (SCM_FIXABLE (z)) { | |
3278 | return SCM_MAKINUM (z); | |
3279 | } else { | |
3280 | #ifdef SCM_BIGDIG | |
3281 | return scm_long2big (z); | |
3282 | #else /* SCM_BIGDIG */ | |
3283 | return scm_make_real ((double) z); | |
3284 | #endif /* SCM_BIGDIG */ | |
3285 | } | |
3286 | } else if (SCM_BIGP (y)) { | |
3287 | intbig: | |
f872b822 | 3288 | { |
98cb6e75 DH |
3289 | long int xx = SCM_INUM (x); |
3290 | #ifndef SCM_DIGSTOOBIG | |
3291 | long z = scm_pseudolong (xx); | |
3292 | return scm_addbig ((SCM_BIGDIG *) & z, SCM_DIGSPERLONG, | |
3293 | (xx < 0) ? SCM_BIGSIGNFLAG : 0, y, 0); | |
3294 | #else /* SCM_DIGSTOOBIG */ | |
3295 | SCM_BIGDIG zdigs [SCM_DIGSPERLONG]; | |
3296 | scm_longdigs (xx, zdigs); | |
3297 | return scm_addbig (zdigs, SCM_DIGSPERLONG, | |
3298 | (xx < 0) ? SCM_BIGSIGNFLAG : 0, y, 0); | |
3299 | #endif /* SCM_DIGSTOOBIG */ | |
0f2d19dd | 3300 | } |
98cb6e75 DH |
3301 | } else if (SCM_REALP (y)) { |
3302 | return scm_make_real (xx + SCM_REAL_VALUE (y)); | |
3303 | } else if (SCM_COMPLEXP (y)) { | |
3304 | return scm_make_complex (xx + SCM_COMPLEX_REAL (y), | |
3305 | SCM_COMPLEX_IMAG (y)); | |
3306 | } else { | |
3307 | SCM_WTA_DISPATCH_2 (g_sum, x, y, SCM_ARGn, s_sum); | |
f872b822 | 3308 | } |
98cb6e75 DH |
3309 | } else if (SCM_BIGP (x)) { |
3310 | if (SCM_INUMP (y)) { | |
3311 | SCM_SWAP (x, y); | |
3312 | goto intbig; | |
3313 | } else if (SCM_BIGP (y)) { | |
3314 | if (SCM_NUMDIGS (x) > SCM_NUMDIGS (y)) { | |
3315 | SCM_SWAP (x, y); | |
3316 | } | |
3317 | return scm_addbig (SCM_BDIGITS (x), SCM_NUMDIGS (x), | |
3318 | SCM_BIGSIGN (x), y, 0); | |
3319 | } else if (SCM_REALP (y)) { | |
3320 | return scm_make_real (scm_big2dbl (x) + SCM_REAL_VALUE (y)); | |
3321 | } else if (SCM_COMPLEXP (y)) { | |
3322 | return scm_make_complex (scm_big2dbl (x) + SCM_COMPLEX_REAL (y), | |
3323 | SCM_COMPLEX_IMAG (y)); | |
3324 | } else { | |
3325 | SCM_WTA_DISPATCH_2 (g_sum, x, y, SCM_ARGn, s_sum); | |
f872b822 | 3326 | } |
98cb6e75 DH |
3327 | } else if (SCM_REALP (x)) { |
3328 | if (SCM_INUMP (y)) { | |
3329 | return scm_make_real (SCM_REAL_VALUE (x) + SCM_INUM (y)); | |
3330 | } else if (SCM_BIGP (y)) { | |
3331 | return scm_make_real (SCM_REAL_VALUE (x) + scm_big2dbl (y)); | |
3332 | } else if (SCM_REALP (y)) { | |
3333 | return scm_make_real (SCM_REAL_VALUE (x) + SCM_REAL_VALUE (y)); | |
3334 | } else if (SCM_COMPLEXP (y)) { | |
3335 | return scm_make_complex (SCM_REAL_VALUE (x) + SCM_COMPLEX_REAL (y), | |
3336 | SCM_COMPLEX_IMAG (y)); | |
3337 | } else { | |
3338 | SCM_WTA_DISPATCH_2 (g_sum, x, y, SCM_ARGn, s_sum); | |
3339 | } | |
3340 | } else if (SCM_COMPLEXP (x)) { | |
3341 | if (SCM_INUMP (y)) { | |
3342 | return scm_make_complex (SCM_COMPLEX_REAL (x) + SCM_INUM (y), | |
3343 | SCM_COMPLEX_IMAG (x)); | |
3344 | } else if (SCM_BIGP (y)) { | |
3345 | return scm_make_complex (SCM_COMPLEX_REAL (x) + scm_big2dbl (y), | |
3346 | SCM_COMPLEX_IMAG (x)); | |
3347 | } else if (SCM_REALP (y)) { | |
3348 | return scm_make_complex (SCM_COMPLEX_REAL (x) + SCM_REAL_VALUE (y), | |
3349 | SCM_COMPLEX_IMAG (x)); | |
3350 | } else if (SCM_COMPLEXP (y)) { | |
3351 | return scm_make_complex (SCM_COMPLEX_REAL (x) + SCM_COMPLEX_REAL (y), | |
3352 | SCM_COMPLEX_IMAG (x) + SCM_COMPLEX_IMAG (y)); | |
3353 | } else { | |
3354 | SCM_WTA_DISPATCH_2 (g_sum, x, y, SCM_ARGn, s_sum); | |
3355 | } | |
3356 | } else { | |
3357 | SCM_WTA_DISPATCH_2 (g_sum, x, y, SCM_ARG1, s_sum); | |
3358 | } | |
0f2d19dd JB |
3359 | } |
3360 | ||
3361 | ||
9de33deb | 3362 | SCM_GPROC1 (s_difference, "-", scm_tc7_asubr, scm_difference, g_difference); |
1cc91f1b | 3363 | |
0f2d19dd | 3364 | SCM |
6e8d25a6 | 3365 | scm_difference (SCM x, SCM y) |
0f2d19dd | 3366 | { |
98cb6e75 DH |
3367 | if (SCM_UNBNDP (y)) { |
3368 | if (SCM_INUMP (x)) { | |
3369 | long xx = -SCM_INUM (x); | |
3370 | if (SCM_FIXABLE (xx)) { | |
3371 | return SCM_MAKINUM (xx); | |
3372 | } else { | |
f872b822 | 3373 | #ifdef SCM_BIGDIG |
98cb6e75 | 3374 | return scm_long2big (xx); |
f3ae5d60 | 3375 | #else |
98cb6e75 | 3376 | return scm_make_real ((double) xx); |
f3ae5d60 | 3377 | #endif |
f3ae5d60 | 3378 | } |
98cb6e75 DH |
3379 | } else if (SCM_BIGP (x)) { |
3380 | SCM z = scm_copybig (x, !SCM_BIGSIGN (x)); | |
3381 | unsigned int digs = SCM_NUMDIGS (z); | |
3382 | unsigned int size = digs * SCM_BITSPERDIG / SCM_CHAR_BIT; | |
3383 | return size <= sizeof (SCM) ? scm_big2inum (z, digs) : z; | |
3384 | } else if (SCM_REALP (x)) { | |
3385 | return scm_make_real (-SCM_REAL_VALUE (x)); | |
3386 | } else if (SCM_COMPLEXP (x)) { | |
3387 | return scm_make_complex (-SCM_COMPLEX_REAL (x), -SCM_COMPLEX_IMAG (x)); | |
3388 | } else { | |
3389 | SCM_WTA_DISPATCH_1 (g_difference, x, SCM_ARG1, s_difference); | |
f872b822 | 3390 | } |
98cb6e75 DH |
3391 | } |
3392 | ||
3393 | if (SCM_INUMP (x)) { | |
3394 | long int xx = SCM_INUM (x); | |
3395 | if (SCM_INUMP (y)) { | |
3396 | long int yy = SCM_INUM (y); | |
3397 | long int z = xx - yy; | |
3398 | if (SCM_FIXABLE (z)) { | |
3399 | return SCM_MAKINUM (z); | |
3400 | } else { | |
f872b822 | 3401 | #ifdef SCM_BIGDIG |
98cb6e75 | 3402 | return scm_long2big (z); |
f872b822 | 3403 | #else |
98cb6e75 | 3404 | return scm_make_real ((double) z); |
f872b822 | 3405 | #endif |
98cb6e75 DH |
3406 | } |
3407 | } else if (SCM_BIGP (y)) { | |
3408 | #ifndef SCM_DIGSTOOBIG | |
3409 | long z = scm_pseudolong (xx); | |
3410 | return scm_addbig ((SCM_BIGDIG *) & z, SCM_DIGSPERLONG, | |
3411 | (xx < 0) ? SCM_BIGSIGNFLAG : 0, y, SCM_BIGSIGNFLAG); | |
f872b822 | 3412 | #else |
98cb6e75 DH |
3413 | SCM_BIGDIG zdigs [SCM_DIGSPERLONG]; |
3414 | scm_longdigs (xx, zdigs); | |
3415 | return scm_addbig (zdigs, SCM_DIGSPERLONG, | |
3416 | (xx < 0) ? SCM_BIGSIGNFLAG : 0, y, SCM_BIGSIGNFLAG); | |
f872b822 | 3417 | #endif |
98cb6e75 DH |
3418 | } else if (SCM_REALP (y)) { |
3419 | return scm_make_real (xx - SCM_REAL_VALUE (y)); | |
3420 | } else if (SCM_COMPLEXP (y)) { | |
3421 | return scm_make_complex (xx - SCM_COMPLEX_REAL (y), | |
3422 | -SCM_COMPLEX_IMAG (y)); | |
3423 | } else { | |
3424 | SCM_WTA_DISPATCH_2 (g_difference, x, y, SCM_ARGn, s_difference); | |
f872b822 | 3425 | } |
98cb6e75 DH |
3426 | } else if (SCM_BIGP (x)) { |
3427 | if (SCM_INUMP (y)) { | |
3428 | long int yy = SCM_INUM (y); | |
3429 | #ifndef SCM_DIGSTOOBIG | |
3430 | long z = scm_pseudolong (yy); | |
3431 | return scm_addbig ((SCM_BIGDIG *) & z, SCM_DIGSPERLONG, | |
3432 | (yy < 0) ? 0 : SCM_BIGSIGNFLAG, x, 0); | |
f872b822 | 3433 | #else |
98cb6e75 DH |
3434 | SCM_BIGDIG zdigs [SCM_DIGSPERLONG]; |
3435 | scm_longdigs (yy, zdigs); | |
3436 | return scm_addbig (zdigs, SCM_DIGSPERLONG, | |
3437 | (yy < 0) ? 0 : SCM_BIGSIGNFLAG, x, 0); | |
0f2d19dd | 3438 | #endif |
98cb6e75 DH |
3439 | } else if (SCM_BIGP (y)) { |
3440 | return (SCM_NUMDIGS (x) < SCM_NUMDIGS (y)) | |
3441 | ? scm_addbig (SCM_BDIGITS (x), SCM_NUMDIGS (x), | |
3442 | SCM_BIGSIGN (x), y, SCM_BIGSIGNFLAG) | |
3443 | : scm_addbig (SCM_BDIGITS (y), SCM_NUMDIGS (y), | |
3444 | SCM_BIGSIGN (y) ^ SCM_BIGSIGNFLAG, x, 0); | |
3445 | } else if (SCM_REALP (y)) { | |
3446 | return scm_make_real (scm_big2dbl (x) - SCM_REAL_VALUE (y)); | |
3447 | } else if (SCM_COMPLEXP (y)) { | |
3448 | return scm_make_complex (scm_big2dbl (x) - SCM_COMPLEX_REAL (y), | |
3449 | - SCM_COMPLEX_IMAG (y)); | |
3450 | } else { | |
3451 | SCM_WTA_DISPATCH_2 (g_difference, x, y, SCM_ARGn, s_difference); | |
3452 | } | |
3453 | } else if (SCM_REALP (x)) { | |
3454 | if (SCM_INUMP (y)) { | |
3455 | return scm_make_real (SCM_REAL_VALUE (x) - SCM_INUM (y)); | |
3456 | } else if (SCM_BIGP (y)) { | |
3457 | return scm_make_real (SCM_REAL_VALUE (x) - scm_big2dbl (y)); | |
3458 | } else if (SCM_REALP (y)) { | |
3459 | return scm_make_real (SCM_REAL_VALUE (x) - SCM_REAL_VALUE (y)); | |
3460 | } else if (SCM_COMPLEXP (y)) { | |
3461 | return scm_make_complex (SCM_REAL_VALUE (x) - SCM_COMPLEX_REAL (y), | |
3462 | -SCM_COMPLEX_IMAG (y)); | |
3463 | } else { | |
3464 | SCM_WTA_DISPATCH_2 (g_difference, x, y, SCM_ARGn, s_difference); | |
3465 | } | |
3466 | } else if (SCM_COMPLEXP (x)) { | |
3467 | if (SCM_INUMP (y)) { | |
3468 | return scm_make_complex (SCM_COMPLEX_REAL (x) - SCM_INUM (y), | |
3469 | SCM_COMPLEX_IMAG (x)); | |
3470 | } else if (SCM_BIGP (y)) { | |
3471 | return scm_make_complex (SCM_COMPLEX_REAL (x) - scm_big2dbl (y), | |
3472 | SCM_COMPLEX_IMAG (x)); | |
3473 | } else if (SCM_REALP (y)) { | |
3474 | return scm_make_complex (SCM_COMPLEX_REAL (x) - SCM_REAL_VALUE (y), | |
3475 | SCM_COMPLEX_IMAG (x)); | |
3476 | } else if (SCM_COMPLEXP (y)) { | |
3477 | return scm_make_complex (SCM_COMPLEX_REAL (x) - SCM_COMPLEX_REAL (y), | |
3478 | SCM_COMPLEX_IMAG (x) - SCM_COMPLEX_IMAG (y)); | |
3479 | } else { | |
3480 | SCM_WTA_DISPATCH_2 (g_difference, x, y, SCM_ARGn, s_difference); | |
3481 | } | |
3482 | } else { | |
3483 | SCM_WTA_DISPATCH_2 (g_difference, x, y, SCM_ARG1, s_difference); | |
3484 | } | |
0f2d19dd JB |
3485 | } |
3486 | ||
3487 | ||
9de33deb | 3488 | SCM_GPROC1 (s_product, "*", scm_tc7_asubr, scm_product, g_product); |
1cc91f1b | 3489 | |
0f2d19dd | 3490 | SCM |
6e8d25a6 | 3491 | scm_product (SCM x, SCM y) |
0f2d19dd | 3492 | { |
f4c627b3 DH |
3493 | if (SCM_UNBNDP (y)) { |
3494 | if (SCM_UNBNDP (x)) { | |
3495 | return SCM_MAKINUM (1L); | |
3496 | } else if (SCM_NUMBERP (x)) { | |
f872b822 | 3497 | return x; |
f4c627b3 DH |
3498 | } else { |
3499 | SCM_WTA_DISPATCH_1 (g_product, x, SCM_ARG1, s_product); | |
f872b822 | 3500 | } |
f4c627b3 DH |
3501 | } |
3502 | ||
3503 | if (SCM_INUMP (x)) { | |
3504 | long xx; | |
3505 | ||
3506 | intbig: | |
3507 | xx = SCM_INUM (x); | |
3508 | ||
3509 | if (xx == 0) { | |
f872b822 | 3510 | return x; |
f4c627b3 DH |
3511 | } else if (xx == 1) { |
3512 | return y; | |
3513 | } | |
3514 | ||
3515 | if (SCM_INUMP (y)) { | |
3516 | long yy = SCM_INUM (y); | |
3517 | long kk = xx * yy; | |
3518 | SCM k = SCM_MAKINUM (kk); | |
3519 | if (kk != SCM_INUM (k) || kk / xx != yy) { | |
f872b822 | 3520 | #ifdef SCM_BIGDIG |
f4c627b3 | 3521 | int sgn = (xx < 0) ^ (yy < 0); |
f872b822 | 3522 | #ifndef SCM_DIGSTOOBIG |
f4c627b3 DH |
3523 | long i = scm_pseudolong (xx); |
3524 | long j = scm_pseudolong (yy); | |
f872b822 MD |
3525 | return scm_mulbig ((SCM_BIGDIG *) & i, SCM_DIGSPERLONG, |
3526 | (SCM_BIGDIG *) & j, SCM_DIGSPERLONG, sgn); | |
3527 | #else /* SCM_DIGSTOOBIG */ | |
f4c627b3 DH |
3528 | SCM_BIGDIG xdigs [SCM_DIGSPERLONG]; |
3529 | SCM_BIGDIG ydigs [SCM_DIGSPERLONG]; | |
3530 | scm_longdigs (xx, xdigs); | |
3531 | scm_longdigs (yy, ydigs); | |
3532 | return scm_mulbig (xdigs, SCM_DIGSPERLONG, | |
3533 | ydigs, SCM_DIGSPERLONG, | |
f872b822 MD |
3534 | sgn); |
3535 | #endif | |
f4c627b3 DH |
3536 | #else |
3537 | return scm_make_real (((double) xx) * ((double) yy)); | |
3538 | #endif | |
3539 | } else { | |
3540 | return k; | |
0f2d19dd | 3541 | } |
f4c627b3 DH |
3542 | } else if (SCM_BIGP (y)) { |
3543 | #ifndef SCM_DIGSTOOBIG | |
3544 | long z = scm_pseudolong (xx); | |
3545 | return scm_mulbig ((SCM_BIGDIG *) & z, SCM_DIGSPERLONG, | |
3546 | SCM_BDIGITS (y), SCM_NUMDIGS (y), | |
3547 | SCM_BIGSIGN (y) ? (xx > 0) : (xx < 0)); | |
0f2d19dd | 3548 | #else |
f4c627b3 DH |
3549 | SCM_BIGDIG zdigs [SCM_DIGSPERLONG]; |
3550 | scm_longdigs (xx, zdigs); | |
3551 | return scm_mulbig (zdigs, SCM_DIGSPERLONG, | |
3552 | SCM_BDIGITS (y), SCM_NUMDIGS (y), | |
3553 | SCM_BIGSIGN (y) ? (xx > 0) : (xx < 0)); | |
0f2d19dd | 3554 | #endif |
f4c627b3 DH |
3555 | } else if (SCM_REALP (y)) { |
3556 | return scm_make_real (xx * SCM_REAL_VALUE (y)); | |
3557 | } else if (SCM_COMPLEXP (y)) { | |
3558 | return scm_make_complex (xx * SCM_COMPLEX_REAL (y), | |
3559 | xx * SCM_COMPLEX_IMAG (y)); | |
3560 | } else { | |
3561 | SCM_WTA_DISPATCH_2 (g_product, x, y, SCM_ARGn, s_product); | |
3562 | } | |
3563 | } else if (SCM_BIGP (x)) { | |
3564 | if (SCM_INUMP (y)) { | |
3565 | SCM_SWAP (x, y); | |
3566 | goto intbig; | |
3567 | } else if (SCM_BIGP (y)) { | |
3568 | return scm_mulbig (SCM_BDIGITS (x), SCM_NUMDIGS (x), | |
3569 | SCM_BDIGITS (y), SCM_NUMDIGS (y), | |
3570 | SCM_BIGSIGN (x) ^ SCM_BIGSIGN (y)); | |
3571 | } else if (SCM_REALP (y)) { | |
3572 | return scm_make_real (scm_big2dbl (x) * SCM_REAL_VALUE (y)); | |
3573 | } else if (SCM_COMPLEXP (y)) { | |
3574 | double z = scm_big2dbl (x); | |
3575 | return scm_make_complex (z * SCM_COMPLEX_REAL (y), | |
3576 | z * SCM_COMPLEX_IMAG (y)); | |
3577 | } else { | |
3578 | SCM_WTA_DISPATCH_2 (g_product, x, y, SCM_ARGn, s_product); | |
3579 | } | |
3580 | } else if (SCM_REALP (x)) { | |
3581 | if (SCM_INUMP (y)) { | |
3582 | return scm_make_real (SCM_INUM (y) * SCM_REAL_VALUE (x)); | |
3583 | } else if (SCM_BIGP (y)) { | |
3584 | return scm_make_real (scm_big2dbl (y) * SCM_REAL_VALUE (x)); | |
3585 | } else if (SCM_REALP (y)) { | |
3586 | return scm_make_real (SCM_REAL_VALUE (x) * SCM_REAL_VALUE (y)); | |
3587 | } else if (SCM_COMPLEXP (y)) { | |
3588 | return scm_make_complex (SCM_REAL_VALUE (x) * SCM_COMPLEX_REAL (y), | |
3589 | SCM_REAL_VALUE (x) * SCM_COMPLEX_IMAG (y)); | |
3590 | } else { | |
3591 | SCM_WTA_DISPATCH_2 (g_product, x, y, SCM_ARGn, s_product); | |
3592 | } | |
3593 | } else if (SCM_COMPLEXP (x)) { | |
3594 | if (SCM_INUMP (y)) { | |
3595 | return scm_make_complex (SCM_INUM (y) * SCM_COMPLEX_REAL (x), | |
3596 | SCM_INUM (y) * SCM_COMPLEX_IMAG (x)); | |
3597 | } else if (SCM_BIGP (y)) { | |
3598 | double z = scm_big2dbl (y); | |
3599 | return scm_make_complex (z * SCM_COMPLEX_REAL (x), | |
3600 | z * SCM_COMPLEX_IMAG (x)); | |
3601 | } else if (SCM_REALP (y)) { | |
3602 | return scm_make_complex (SCM_REAL_VALUE (y) * SCM_COMPLEX_REAL (x), | |
3603 | SCM_REAL_VALUE (y) * SCM_COMPLEX_IMAG (x)); | |
3604 | } else if (SCM_COMPLEXP (y)) { | |
3605 | return scm_make_complex (SCM_COMPLEX_REAL (x) * SCM_COMPLEX_REAL (y) | |
3606 | - SCM_COMPLEX_IMAG (x) * SCM_COMPLEX_IMAG (y), | |
3607 | SCM_COMPLEX_REAL (x) * SCM_COMPLEX_IMAG (y) | |
3608 | + SCM_COMPLEX_IMAG (x) * SCM_COMPLEX_REAL (y)); | |
3609 | } else { | |
3610 | SCM_WTA_DISPATCH_2 (g_product, x, y, SCM_ARGn, s_product); | |
3611 | } | |
3612 | } else { | |
3613 | SCM_WTA_DISPATCH_2 (g_product, x, y, SCM_ARG1, s_product); | |
0f2d19dd JB |
3614 | } |
3615 | } | |
3616 | ||
3617 | ||
0f2d19dd | 3618 | double |
6e8d25a6 | 3619 | scm_num2dbl (SCM a, const char *why) |
f4c627b3 | 3620 | #define FUNC_NAME why |
0f2d19dd | 3621 | { |
f4c627b3 | 3622 | if (SCM_INUMP (a)) { |
0f2d19dd | 3623 | return (double) SCM_INUM (a); |
f4c627b3 DH |
3624 | } else if (SCM_BIGP (a)) { |
3625 | return scm_big2dbl (a); | |
3626 | } else if (SCM_REALP (a)) { | |
3627 | return (SCM_REAL_VALUE (a)); | |
3628 | } else { | |
3629 | SCM_WRONG_TYPE_ARG (SCM_ARGn, a); | |
3630 | } | |
0f2d19dd | 3631 | } |
f4c627b3 | 3632 | #undef FUNC_NAME |
0f2d19dd JB |
3633 | |
3634 | ||
9de33deb | 3635 | SCM_GPROC1 (s_divide, "/", scm_tc7_asubr, scm_divide, g_divide); |
1cc91f1b | 3636 | |
0f2d19dd | 3637 | SCM |
6e8d25a6 | 3638 | scm_divide (SCM x, SCM y) |
0f2d19dd | 3639 | { |
f8de44c1 DH |
3640 | double a; |
3641 | ||
3642 | if (SCM_UNBNDP (y)) { | |
3643 | if (SCM_UNBNDP (x)) { | |
3644 | SCM_WTA_DISPATCH_0 (g_divide, x, SCM_ARG1, s_divide); | |
3645 | } else if (SCM_INUMP (x)) { | |
3646 | if (SCM_EQ_P (x, SCM_MAKINUM (1L)) || SCM_EQ_P (x, SCM_MAKINUM (-1L))) { | |
3647 | return x; | |
3648 | } else { | |
3649 | return scm_make_real (1.0 / (double) SCM_INUM (x)); | |
3650 | } | |
f8de44c1 DH |
3651 | } else if (SCM_BIGP (x)) { |
3652 | return scm_make_real (1.0 / scm_big2dbl (x)); | |
f8de44c1 DH |
3653 | } else if (SCM_REALP (x)) { |
3654 | return scm_make_real (1.0 / SCM_REAL_VALUE (x)); | |
3655 | } else if (SCM_COMPLEXP (x)) { | |
3656 | double r = SCM_COMPLEX_REAL (x); | |
3657 | double i = SCM_COMPLEX_IMAG (x); | |
3658 | double d = r * r + i * i; | |
3659 | return scm_make_complex (r / d, -i / d); | |
3660 | } else { | |
3661 | SCM_WTA_DISPATCH_1 (g_divide, x, SCM_ARG1, s_divide); | |
3662 | } | |
3663 | } | |
3664 | ||
3665 | if (SCM_INUMP (x)) { | |
3666 | long xx = SCM_INUM (x); | |
3667 | if (SCM_INUMP (y)) { | |
3668 | long yy = SCM_INUM (y); | |
3669 | if (yy == 0) { | |
f4c627b3 | 3670 | scm_num_overflow (s_divide); |
f8de44c1 DH |
3671 | } else if (xx % yy != 0) { |
3672 | return scm_make_real ((double) xx / (double) yy); | |
3673 | } else { | |
3674 | long z = xx / yy; | |
3675 | if (SCM_FIXABLE (z)) { | |
3676 | return SCM_MAKINUM (z); | |
3677 | } else { | |
f872b822 | 3678 | #ifdef SCM_BIGDIG |
f8de44c1 | 3679 | return scm_long2big (z); |
f872b822 | 3680 | #else |
f8de44c1 | 3681 | return scm_make_real ((double) xx / (double) yy); |
f872b822 | 3682 | #endif |
f872b822 | 3683 | } |
f8de44c1 | 3684 | } |
f8de44c1 DH |
3685 | } else if (SCM_BIGP (y)) { |
3686 | return scm_make_real ((double) xx / scm_big2dbl (y)); | |
f8de44c1 DH |
3687 | } else if (SCM_REALP (y)) { |
3688 | return scm_make_real ((double) xx / SCM_REAL_VALUE (y)); | |
3689 | } else if (SCM_COMPLEXP (y)) { | |
3690 | a = xx; | |
3691 | complex_div: /* y _must_ be a complex number */ | |
3692 | { | |
3693 | double r = SCM_COMPLEX_REAL (y); | |
3694 | double i = SCM_COMPLEX_IMAG (y); | |
3695 | double d = r * r + i * i; | |
3696 | return scm_make_complex ((a * r) / d, (-a * i) / d); | |
3697 | } | |
3698 | } else { | |
3699 | SCM_WTA_DISPATCH_2 (g_divide, x, y, SCM_ARGn, s_divide); | |
3700 | } | |
f8de44c1 DH |
3701 | } else if (SCM_BIGP (x)) { |
3702 | if (SCM_INUMP (y)) { | |
3703 | long int yy = SCM_INUM (y); | |
3704 | if (yy == 0) { | |
3705 | scm_num_overflow (s_divide); | |
3706 | } else if (yy == 1) { | |
3707 | return x; | |
3708 | } else { | |
3709 | long z = yy < 0 ? -yy : yy; | |
3710 | if (z < SCM_BIGRAD) { | |
3711 | SCM w = scm_copybig (x, SCM_BIGSIGN (x) ? (yy > 0) : (yy < 0)); | |
3712 | return scm_divbigdig (SCM_BDIGITS (w), SCM_NUMDIGS (w), | |
3713 | (SCM_BIGDIG) z) | |
3714 | ? scm_make_real (scm_big2dbl (x) / (double) yy) | |
3715 | : scm_normbig (w); | |
3716 | } else { | |
3717 | SCM w; | |
3718 | #ifndef SCM_DIGSTOOBIG | |
3719 | z = scm_pseudolong (z); | |
3720 | w = scm_divbigbig (SCM_BDIGITS (x), SCM_NUMDIGS (x), | |
3721 | (SCM_BIGDIG *) & z, SCM_DIGSPERLONG, | |
3722 | SCM_BIGSIGN (x) ? (yy > 0) : (yy < 0), 3); | |
f872b822 | 3723 | #else |
f8de44c1 DH |
3724 | SCM_BIGDIG zdigs[SCM_DIGSPERLONG]; |
3725 | scm_longdigs (z, zdigs); | |
3726 | w = scm_divbigbig (SCM_BDIGITS (x), SCM_NUMDIGS (x), | |
3727 | zdigs, SCM_DIGSPERLONG, | |
3728 | SCM_BIGSIGN (x) ? (yy > 0) : (yy < 0), 3); | |
f872b822 | 3729 | #endif |
f4c627b3 DH |
3730 | return (!SCM_UNBNDP (w)) |
3731 | ? w | |
3732 | : scm_make_real (scm_big2dbl (x) / (double) yy); | |
f872b822 | 3733 | } |
f8de44c1 DH |
3734 | } |
3735 | } else if (SCM_BIGP (y)) { | |
3736 | SCM w = scm_divbigbig (SCM_BDIGITS (x), SCM_NUMDIGS (x), | |
3737 | SCM_BDIGITS (y), SCM_NUMDIGS (y), | |
3738 | SCM_BIGSIGN (x) ^ SCM_BIGSIGN (y), 3); | |
f4c627b3 DH |
3739 | return (!SCM_UNBNDP (w)) |
3740 | ? w | |
3741 | : scm_make_real (scm_big2dbl (x) / scm_big2dbl (y)); | |
f8de44c1 DH |
3742 | } else if (SCM_REALP (y)) { |
3743 | return scm_make_real (scm_big2dbl (x) / SCM_REAL_VALUE (y)); | |
3744 | } else if (SCM_COMPLEXP (y)) { | |
3745 | a = scm_big2dbl (x); | |
3746 | goto complex_div; | |
3747 | } else { | |
3748 | SCM_WTA_DISPATCH_2 (g_divide, x, y, SCM_ARGn, s_divide); | |
f872b822 | 3749 | } |
f8de44c1 DH |
3750 | } else if (SCM_REALP (x)) { |
3751 | double rx = SCM_REAL_VALUE (x); | |
3752 | if (SCM_INUMP (y)) { | |
3753 | return scm_make_real (rx / (double) SCM_INUM (y)); | |
f8de44c1 DH |
3754 | } else if (SCM_BIGP (y)) { |
3755 | return scm_make_real (rx / scm_big2dbl (y)); | |
f8de44c1 DH |
3756 | } else if (SCM_REALP (y)) { |
3757 | return scm_make_real (rx / SCM_REAL_VALUE (y)); | |
3758 | } else if (SCM_COMPLEXP (y)) { | |
3759 | a = rx; | |
3760 | goto complex_div; | |
3761 | } else { | |
3762 | SCM_WTA_DISPATCH_2 (g_divide, x, y, SCM_ARGn, s_divide); | |
f872b822 | 3763 | } |
f8de44c1 DH |
3764 | } else if (SCM_COMPLEXP (x)) { |
3765 | double rx = SCM_COMPLEX_REAL (x); | |
3766 | double ix = SCM_COMPLEX_IMAG (x); | |
3767 | if (SCM_INUMP (y)) { | |
3768 | double d = SCM_INUM (y); | |
3769 | return scm_make_complex (rx / d, ix / d); | |
f8de44c1 DH |
3770 | } else if (SCM_BIGP (y)) { |
3771 | double d = scm_big2dbl (y); | |
3772 | return scm_make_complex (rx / d, ix / d); | |
f8de44c1 DH |
3773 | } else if (SCM_REALP (y)) { |
3774 | double d = SCM_REAL_VALUE (y); | |
3775 | return scm_make_complex (rx / d, ix / d); | |
3776 | } else if (SCM_COMPLEXP (y)) { | |
3777 | double ry = SCM_COMPLEX_REAL (y); | |
3778 | double iy = SCM_COMPLEX_IMAG (y); | |
3779 | double d = ry * ry + iy * iy; | |
3780 | return scm_make_complex ((rx * ry + ix * iy) / d, | |
3781 | (ix * ry - rx * iy) / d); | |
3782 | } else { | |
3783 | SCM_WTA_DISPATCH_2 (g_divide, x, y, SCM_ARGn, s_divide); | |
3784 | } | |
3785 | } else { | |
3786 | SCM_WTA_DISPATCH_2 (g_divide, x, y, SCM_ARG1, s_divide); | |
0f2d19dd JB |
3787 | } |
3788 | } | |
3789 | ||
3790 | ||
9de33deb | 3791 | SCM_GPROC1 (s_asinh, "$asinh", scm_tc7_cxr, (SCM (*)()) scm_asinh, g_asinh); |
1cc91f1b | 3792 | |
0f2d19dd | 3793 | double |
6e8d25a6 | 3794 | scm_asinh (double x) |
0f2d19dd | 3795 | { |
f872b822 | 3796 | return log (x + sqrt (x * x + 1)); |
0f2d19dd JB |
3797 | } |
3798 | ||
3799 | ||
3800 | ||
3801 | ||
9de33deb | 3802 | SCM_GPROC1 (s_acosh, "$acosh", scm_tc7_cxr, (SCM (*)()) scm_acosh, g_acosh); |
1cc91f1b | 3803 | |
0f2d19dd | 3804 | double |
6e8d25a6 | 3805 | scm_acosh (double x) |
0f2d19dd | 3806 | { |
f872b822 | 3807 | return log (x + sqrt (x * x - 1)); |
0f2d19dd JB |
3808 | } |
3809 | ||
3810 | ||
3811 | ||
3812 | ||
9de33deb | 3813 | SCM_GPROC1 (s_atanh, "$atanh", scm_tc7_cxr, (SCM (*)()) scm_atanh, g_atanh); |
1cc91f1b | 3814 | |
0f2d19dd | 3815 | double |
6e8d25a6 | 3816 | scm_atanh (double x) |
0f2d19dd | 3817 | { |
f872b822 | 3818 | return 0.5 * log ((1 + x) / (1 - x)); |
0f2d19dd JB |
3819 | } |
3820 | ||
3821 | ||
3822 | ||
3823 | ||
9de33deb | 3824 | SCM_GPROC1 (s_truncate, "truncate", scm_tc7_cxr, (SCM (*)()) scm_truncate, g_truncate); |
1cc91f1b | 3825 | |
0f2d19dd | 3826 | double |
6e8d25a6 | 3827 | scm_truncate (double x) |
0f2d19dd | 3828 | { |
f872b822 MD |
3829 | if (x < 0.0) |
3830 | return -floor (-x); | |
3831 | return floor (x); | |
0f2d19dd JB |
3832 | } |
3833 | ||
3834 | ||
3835 | ||
9de33deb | 3836 | SCM_GPROC1 (s_round, "round", scm_tc7_cxr, (SCM (*)()) scm_round, g_round); |
1cc91f1b | 3837 | |
0f2d19dd | 3838 | double |
6e8d25a6 | 3839 | scm_round (double x) |
0f2d19dd JB |
3840 | { |
3841 | double plus_half = x + 0.5; | |
f872b822 | 3842 | double result = floor (plus_half); |
0f2d19dd | 3843 | /* Adjust so that the scm_round is towards even. */ |
f872b822 | 3844 | return (plus_half == result && plus_half / 2 != floor (plus_half / 2)) |
0f2d19dd JB |
3845 | ? result - 1 : result; |
3846 | } | |
3847 | ||
3848 | ||
3849 | ||
9de33deb | 3850 | SCM_GPROC1 (s_exact_to_inexact, "exact->inexact", scm_tc7_cxr, (SCM (*)()) scm_exact_to_inexact, g_exact_to_inexact); |
1cc91f1b | 3851 | |
0f2d19dd | 3852 | double |
6e8d25a6 | 3853 | scm_exact_to_inexact (double z) |
0f2d19dd JB |
3854 | { |
3855 | return z; | |
3856 | } | |
3857 | ||
3858 | ||
9de33deb MD |
3859 | SCM_GPROC1 (s_i_floor, "floor", scm_tc7_cxr, (SCM (*)()) floor, g_i_floor); |
3860 | SCM_GPROC1 (s_i_ceil, "ceiling", scm_tc7_cxr, (SCM (*)()) ceil, g_i_ceil); | |
3861 | SCM_GPROC1 (s_i_sqrt, "$sqrt", scm_tc7_cxr, (SCM (*)()) sqrt, g_i_sqrt); | |
3862 | SCM_GPROC1 (s_i_abs, "$abs", scm_tc7_cxr, (SCM (*)()) fabs, g_i_abs); | |
3863 | SCM_GPROC1 (s_i_exp, "$exp", scm_tc7_cxr, (SCM (*)()) exp, g_i_exp); | |
3864 | SCM_GPROC1 (s_i_log, "$log", scm_tc7_cxr, (SCM (*)()) log, g_i_log); | |
3865 | SCM_GPROC1 (s_i_sin, "$sin", scm_tc7_cxr, (SCM (*)()) sin, g_i_sin); | |
3866 | SCM_GPROC1 (s_i_cos, "$cos", scm_tc7_cxr, (SCM (*)()) cos, g_i_cos); | |
3867 | SCM_GPROC1 (s_i_tan, "$tan", scm_tc7_cxr, (SCM (*)()) tan, g_i_tan); | |
3868 | SCM_GPROC1 (s_i_asin, "$asin", scm_tc7_cxr, (SCM (*)()) asin, g_i_asin); | |
3869 | SCM_GPROC1 (s_i_acos, "$acos", scm_tc7_cxr, (SCM (*)()) acos, g_i_acos); | |
3870 | SCM_GPROC1 (s_i_atan, "$atan", scm_tc7_cxr, (SCM (*)()) atan, g_i_atan); | |
3871 | SCM_GPROC1 (s_i_sinh, "$sinh", scm_tc7_cxr, (SCM (*)()) sinh, g_i_sinh); | |
3872 | SCM_GPROC1 (s_i_cosh, "$cosh", scm_tc7_cxr, (SCM (*)()) cosh, g_i_cosh); | |
3873 | SCM_GPROC1 (s_i_tanh, "$tanh", scm_tc7_cxr, (SCM (*)()) tanh, g_i_tanh); | |
f872b822 MD |
3874 | |
3875 | struct dpair | |
3876 | { | |
3877 | double x, y; | |
3878 | }; | |
3879 | ||
3eeba8d4 JB |
3880 | static void scm_two_doubles (SCM z1, |
3881 | SCM z2, | |
3882 | const char *sstring, | |
3883 | struct dpair * xy); | |
f872b822 MD |
3884 | |
3885 | static void | |
6e8d25a6 | 3886 | scm_two_doubles (SCM z1, SCM z2, const char *sstring, struct dpair *xy) |
0f2d19dd | 3887 | { |
98cb6e75 | 3888 | if (SCM_INUMP (z1)) { |
f872b822 | 3889 | xy->x = SCM_INUM (z1); |
98cb6e75 DH |
3890 | } else if (SCM_BIGP (z1)) { |
3891 | xy->x = scm_big2dbl (z1); | |
3892 | } else if (SCM_REALP (z1)) { | |
3893 | xy->x = SCM_REAL_VALUE (z1); | |
3894 | } else { | |
3895 | scm_wrong_type_arg (sstring, SCM_ARG1, z1); | |
3896 | } | |
3897 | ||
3898 | if (SCM_INUMP (z2)) { | |
f872b822 | 3899 | xy->y = SCM_INUM (z2); |
98cb6e75 DH |
3900 | } else if (SCM_BIGP (z2)) { |
3901 | xy->y = scm_big2dbl (z2); | |
3902 | } else if (SCM_REALP (z2)) { | |
3903 | xy->y = SCM_REAL_VALUE (z2); | |
3904 | } else { | |
3905 | scm_wrong_type_arg (sstring, SCM_ARG2, z2); | |
3906 | } | |
0f2d19dd JB |
3907 | } |
3908 | ||
3909 | ||
a1ec6916 | 3910 | SCM_DEFINE (scm_sys_expt, "$expt", 2, 0, 0, |
1bbd0b84 | 3911 | (SCM z1, SCM z2), |
bb628794 | 3912 | "") |
1bbd0b84 | 3913 | #define FUNC_NAME s_scm_sys_expt |
0f2d19dd JB |
3914 | { |
3915 | struct dpair xy; | |
1bbd0b84 | 3916 | scm_two_doubles (z1, z2, FUNC_NAME, &xy); |
f8de44c1 | 3917 | return scm_make_real (pow (xy.x, xy.y)); |
0f2d19dd | 3918 | } |
1bbd0b84 | 3919 | #undef FUNC_NAME |
0f2d19dd JB |
3920 | |
3921 | ||
a1ec6916 | 3922 | SCM_DEFINE (scm_sys_atan2, "$atan2", 2, 0, 0, |
1bbd0b84 | 3923 | (SCM z1, SCM z2), |
b380b885 | 3924 | "") |
1bbd0b84 | 3925 | #define FUNC_NAME s_scm_sys_atan2 |
0f2d19dd JB |
3926 | { |
3927 | struct dpair xy; | |
1bbd0b84 | 3928 | scm_two_doubles (z1, z2, FUNC_NAME, &xy); |
f8de44c1 | 3929 | return scm_make_real (atan2 (xy.x, xy.y)); |
0f2d19dd | 3930 | } |
1bbd0b84 | 3931 | #undef FUNC_NAME |
0f2d19dd JB |
3932 | |
3933 | ||
a1ec6916 | 3934 | SCM_DEFINE (scm_make_rectangular, "make-rectangular", 2, 0, 0, |
bb628794 DH |
3935 | (SCM real, SCM imaginary), |
3936 | "Return a complex number constructed of the given REAL and\n" | |
3937 | "IMAGINARY parts.") | |
1bbd0b84 | 3938 | #define FUNC_NAME s_scm_make_rectangular |
0f2d19dd JB |
3939 | { |
3940 | struct dpair xy; | |
bb628794 | 3941 | scm_two_doubles (real, imaginary, FUNC_NAME, &xy); |
f8de44c1 | 3942 | return scm_make_complex (xy.x, xy.y); |
0f2d19dd | 3943 | } |
1bbd0b84 | 3944 | #undef FUNC_NAME |
0f2d19dd JB |
3945 | |
3946 | ||
3947 | ||
a1ec6916 | 3948 | SCM_DEFINE (scm_make_polar, "make-polar", 2, 0, 0, |
1bbd0b84 | 3949 | (SCM z1, SCM z2), |
bb628794 | 3950 | "Return the complex number Z1 * e^(i * Z2).") |
1bbd0b84 | 3951 | #define FUNC_NAME s_scm_make_polar |
0f2d19dd JB |
3952 | { |
3953 | struct dpair xy; | |
1bbd0b84 | 3954 | scm_two_doubles (z1, z2, FUNC_NAME, &xy); |
f8de44c1 | 3955 | return scm_make_complex (xy.x * cos (xy.y), xy.x * sin (xy.y)); |
0f2d19dd | 3956 | } |
1bbd0b84 | 3957 | #undef FUNC_NAME |
0f2d19dd JB |
3958 | |
3959 | ||
152f82bf | 3960 | SCM_GPROC (s_real_part, "real-part", 1, 0, 0, scm_real_part, g_real_part); |
1cc91f1b | 3961 | |
0f2d19dd | 3962 | SCM |
6e8d25a6 | 3963 | scm_real_part (SCM z) |
0f2d19dd | 3964 | { |
c2ff8ab0 DH |
3965 | if (SCM_INUMP (z)) { |
3966 | return z; | |
3967 | } else if (SCM_BIGP (z)) { | |
3968 | return z; | |
3969 | } else if (SCM_REALP (z)) { | |
3970 | return z; | |
3971 | } else if (SCM_COMPLEXP (z)) { | |
3972 | return scm_make_real (SCM_COMPLEX_REAL (z)); | |
3973 | } else { | |
3974 | SCM_WTA_DISPATCH_1 (g_real_part, z, SCM_ARG1, s_real_part); | |
3975 | } | |
0f2d19dd JB |
3976 | } |
3977 | ||
3978 | ||
152f82bf | 3979 | SCM_GPROC (s_imag_part, "imag-part", 1, 0, 0, scm_imag_part, g_imag_part); |
1cc91f1b | 3980 | |
0f2d19dd | 3981 | SCM |
6e8d25a6 | 3982 | scm_imag_part (SCM z) |
0f2d19dd | 3983 | { |
c2ff8ab0 | 3984 | if (SCM_INUMP (z)) { |
f872b822 | 3985 | return SCM_INUM0; |
c2ff8ab0 | 3986 | } else if (SCM_BIGP (z)) { |
f872b822 | 3987 | return SCM_INUM0; |
c2ff8ab0 DH |
3988 | } else if (SCM_REALP (z)) { |
3989 | return scm_flo0; | |
3990 | } else if (SCM_COMPLEXP (z)) { | |
3991 | return scm_make_real (SCM_COMPLEX_IMAG (z)); | |
3992 | } else { | |
3993 | SCM_WTA_DISPATCH_1 (g_imag_part, z, SCM_ARG1, s_imag_part); | |
3994 | } | |
0f2d19dd JB |
3995 | } |
3996 | ||
3997 | ||
9de33deb | 3998 | SCM_GPROC (s_magnitude, "magnitude", 1, 0, 0, scm_magnitude, g_magnitude); |
1cc91f1b | 3999 | |
0f2d19dd | 4000 | SCM |
6e8d25a6 | 4001 | scm_magnitude (SCM z) |
0f2d19dd | 4002 | { |
c2ff8ab0 | 4003 | if (SCM_INUMP (z)) { |
5986c47d DH |
4004 | long int zz = SCM_INUM (z); |
4005 | if (zz >= 0) { | |
4006 | return z; | |
4007 | } else if (SCM_POSFIXABLE (-zz)) { | |
4008 | return SCM_MAKINUM (-zz); | |
4009 | } else { | |
4010 | #ifdef SCM_BIGDIG | |
4011 | return scm_long2big (-zz); | |
4012 | #else | |
4013 | scm_num_overflow (s_magnitude); | |
4014 | #endif | |
4015 | } | |
c2ff8ab0 | 4016 | } else if (SCM_BIGP (z)) { |
5986c47d DH |
4017 | if (!SCM_BIGSIGN (z)) { |
4018 | return z; | |
4019 | } else { | |
4020 | return scm_copybig (z, 0); | |
4021 | } | |
c2ff8ab0 DH |
4022 | } else if (SCM_REALP (z)) { |
4023 | return scm_make_real (fabs (SCM_REAL_VALUE (z))); | |
4024 | } else if (SCM_COMPLEXP (z)) { | |
4025 | double r = SCM_COMPLEX_REAL (z); | |
4026 | double i = SCM_COMPLEX_IMAG (z); | |
4027 | return scm_make_real (sqrt (i * i + r * r)); | |
4028 | } else { | |
4029 | SCM_WTA_DISPATCH_1 (g_magnitude, z, SCM_ARG1, s_magnitude); | |
4030 | } | |
0f2d19dd JB |
4031 | } |
4032 | ||
4033 | ||
9de33deb | 4034 | SCM_GPROC (s_angle, "angle", 1, 0, 0, scm_angle, g_angle); |
1cc91f1b | 4035 | |
0f2d19dd | 4036 | SCM |
6e8d25a6 | 4037 | scm_angle (SCM z) |
0f2d19dd | 4038 | { |
f4c627b3 DH |
4039 | if (SCM_INUMP (z)) { |
4040 | if (SCM_INUM (z) >= 0) { | |
4041 | return scm_make_real (atan2 (0.0, 1.0)); | |
4042 | } else { | |
4043 | return scm_make_real (atan2 (0.0, -1.0)); | |
f872b822 | 4044 | } |
f4c627b3 DH |
4045 | } else if (SCM_BIGP (z)) { |
4046 | if (SCM_BIGSIGN (z)) { | |
4047 | return scm_make_real (atan2 (0.0, -1.0)); | |
4048 | } else { | |
4049 | return scm_make_real (atan2 (0.0, 1.0)); | |
0f2d19dd | 4050 | } |
f4c627b3 DH |
4051 | } else if (SCM_REALP (z)) { |
4052 | return scm_make_real (atan2 (0.0, SCM_REAL_VALUE (z))); | |
4053 | } else if (SCM_COMPLEXP (z)) { | |
4054 | return scm_make_real (atan2 (SCM_COMPLEX_IMAG (z), SCM_COMPLEX_REAL (z))); | |
4055 | } else { | |
4056 | SCM_WTA_DISPATCH_1 (g_angle, z, SCM_ARG1, s_angle); | |
4057 | } | |
0f2d19dd JB |
4058 | } |
4059 | ||
4060 | ||
a1ec6916 | 4061 | SCM_DEFINE (scm_inexact_to_exact, "inexact->exact", 1, 0, 0, |
1bbd0b84 | 4062 | (SCM z), |
bb628794 | 4063 | "Returns an exact number that is numerically closest to Z.") |
1bbd0b84 | 4064 | #define FUNC_NAME s_scm_inexact_to_exact |
0f2d19dd | 4065 | { |
c2ff8ab0 | 4066 | if (SCM_INUMP (z)) { |
f872b822 | 4067 | return z; |
c2ff8ab0 | 4068 | } else if (SCM_BIGP (z)) { |
f872b822 | 4069 | return z; |
c2ff8ab0 DH |
4070 | } else if (SCM_REALP (z)) { |
4071 | double u = floor (SCM_REAL_VALUE (z) + 0.5); | |
4072 | long lu = (long) u; | |
4073 | if (SCM_FIXABLE (lu)) { | |
4074 | return SCM_MAKINUM (lu); | |
f872b822 | 4075 | #ifdef SCM_BIGDIG |
c2ff8ab0 DH |
4076 | } else if (isfinite (u)) { |
4077 | return scm_dbl2big (u); | |
f872b822 | 4078 | #endif |
c2ff8ab0 DH |
4079 | } else { |
4080 | scm_num_overflow (s_scm_inexact_to_exact); | |
4081 | } | |
4082 | } else { | |
4083 | SCM_WRONG_TYPE_ARG (1, z); | |
4084 | } | |
0f2d19dd | 4085 | } |
1bbd0b84 | 4086 | #undef FUNC_NAME |
0f2d19dd JB |
4087 | |
4088 | ||
0f2d19dd | 4089 | #ifdef SCM_BIGDIG |
0f2d19dd | 4090 | /* d must be integer */ |
1cc91f1b | 4091 | |
0f2d19dd | 4092 | SCM |
6e8d25a6 | 4093 | scm_dbl2big (double d) |
0f2d19dd JB |
4094 | { |
4095 | scm_sizet i = 0; | |
4096 | long c; | |
4097 | SCM_BIGDIG *digits; | |
4098 | SCM ans; | |
f872b822 MD |
4099 | double u = (d < 0) ? -d : d; |
4100 | while (0 != floor (u)) | |
4101 | { | |
4102 | u /= SCM_BIGRAD; | |
4103 | i++; | |
4104 | } | |
4105 | ans = scm_mkbig (i, d < 0); | |
4106 | digits = SCM_BDIGITS (ans); | |
4107 | while (i--) | |
4108 | { | |
4109 | u *= SCM_BIGRAD; | |
4110 | c = floor (u); | |
4111 | u -= c; | |
4112 | digits[i] = c; | |
4113 | } | |
cf7c17e9 | 4114 | #ifndef SCM_RECKLESS |
e1724d20 | 4115 | if (u != 0) |
52859adf | 4116 | scm_num_overflow ("dbl2big"); |
e1724d20 | 4117 | #endif |
0f2d19dd JB |
4118 | return ans; |
4119 | } | |
4120 | ||
4121 | ||
4122 | ||
0f2d19dd | 4123 | double |
6e8d25a6 | 4124 | scm_big2dbl (SCM b) |
0f2d19dd JB |
4125 | { |
4126 | double ans = 0.0; | |
f872b822 MD |
4127 | scm_sizet i = SCM_NUMDIGS (b); |
4128 | SCM_BIGDIG *digits = SCM_BDIGITS (b); | |
4129 | while (i--) | |
4130 | ans = digits[i] + SCM_BIGRAD * ans; | |
f3ae5d60 MD |
4131 | if (SCM_BIGSIGN (b)) |
4132 | return - ans; | |
0f2d19dd JB |
4133 | return ans; |
4134 | } | |
f872b822 | 4135 | #endif |
0f2d19dd | 4136 | |
1cc91f1b | 4137 | |
0f2d19dd | 4138 | SCM |
6e8d25a6 | 4139 | scm_long2num (long sl) |
0f2d19dd | 4140 | { |
f872b822 MD |
4141 | if (!SCM_FIXABLE (sl)) |
4142 | { | |
0f2d19dd | 4143 | #ifdef SCM_BIGDIG |
f872b822 | 4144 | return scm_long2big (sl); |
0f2d19dd | 4145 | #else |
f8de44c1 | 4146 | return scm_make_real ((double) sl); |
f872b822 MD |
4147 | #endif |
4148 | } | |
4149 | return SCM_MAKINUM (sl); | |
0f2d19dd JB |
4150 | } |
4151 | ||
4152 | ||
5c11cc9d | 4153 | #ifdef HAVE_LONG_LONGS |
1cc91f1b | 4154 | |
0f2d19dd | 4155 | SCM |
6e8d25a6 | 4156 | scm_long_long2num (long_long sl) |
0f2d19dd | 4157 | { |
f872b822 MD |
4158 | if (!SCM_FIXABLE (sl)) |
4159 | { | |
0f2d19dd | 4160 | #ifdef SCM_BIGDIG |
f872b822 | 4161 | return scm_long_long2big (sl); |
0f2d19dd | 4162 | #else |
f8de44c1 | 4163 | return scm_make_real ((double) sl); |
f872b822 MD |
4164 | #endif |
4165 | } | |
f2961ccd DH |
4166 | else |
4167 | { | |
4168 | /* we know that sl fits into an inum */ | |
4169 | return SCM_MAKINUM ((scm_bits_t) sl); | |
4170 | } | |
0f2d19dd | 4171 | } |
0f2d19dd | 4172 | |
98cb6e75 | 4173 | #endif |
0f2d19dd | 4174 | |
1cc91f1b | 4175 | |
0f2d19dd | 4176 | SCM |
6e8d25a6 | 4177 | scm_ulong2num (unsigned long sl) |
0f2d19dd | 4178 | { |
f872b822 MD |
4179 | if (!SCM_POSFIXABLE (sl)) |
4180 | { | |
0f2d19dd | 4181 | #ifdef SCM_BIGDIG |
f872b822 | 4182 | return scm_ulong2big (sl); |
0f2d19dd | 4183 | #else |
f8de44c1 | 4184 | return scm_make_real ((double) sl); |
f872b822 MD |
4185 | #endif |
4186 | } | |
4187 | return SCM_MAKINUM (sl); | |
0f2d19dd JB |
4188 | } |
4189 | ||
1cc91f1b | 4190 | |
0f2d19dd | 4191 | long |
6e8d25a6 | 4192 | scm_num2long (SCM num, char *pos, const char *s_caller) |
0f2d19dd | 4193 | { |
98cb6e75 DH |
4194 | if (SCM_INUMP (num)) { |
4195 | return SCM_INUM (num); | |
4196 | } else if (SCM_BIGP (num)) { | |
4197 | long int res; | |
4198 | /* can't use res directly in case num is -2^31. */ | |
4199 | unsigned long int pos_res = 0; | |
4200 | unsigned long int old_res = 0; | |
4201 | scm_sizet l; | |
4202 | ||
4203 | for (l = SCM_NUMDIGS (num); l--;) { | |
4204 | pos_res = SCM_BIGUP (pos_res) + SCM_BDIGITS (num)[l]; | |
4205 | if (pos_res >= old_res) { | |
4206 | old_res = pos_res; | |
4207 | } else { | |
4208 | /* overflow. */ | |
4209 | scm_out_of_range (s_caller, num); | |
4210 | } | |
0f2d19dd | 4211 | } |
98cb6e75 DH |
4212 | if (SCM_BIGSIGN (num)) { |
4213 | res = -pos_res; | |
4214 | if (res <= 0) { | |
4215 | return res; | |
4216 | } else { | |
4217 | scm_out_of_range (s_caller, num); | |
4218 | } | |
4219 | } else { | |
4220 | res = pos_res; | |
4221 | if (res >= 0) { | |
4222 | return res; | |
4223 | } else { | |
4224 | scm_out_of_range (s_caller, num); | |
4225 | } | |
0f2d19dd | 4226 | } |
98cb6e75 DH |
4227 | } else if (SCM_REALP (num)) { |
4228 | double u = SCM_REAL_VALUE (num); | |
4229 | long int res = u; | |
4230 | if ((double) res == u) { | |
5c11cc9d | 4231 | return res; |
98cb6e75 DH |
4232 | } else { |
4233 | scm_out_of_range (s_caller, num); | |
f872b822 | 4234 | } |
98cb6e75 DH |
4235 | } else { |
4236 | scm_wrong_type_arg (s_caller, (int) pos, num); | |
4237 | } | |
0f2d19dd JB |
4238 | } |
4239 | ||
4240 | ||
5c11cc9d | 4241 | #ifdef HAVE_LONG_LONGS |
1cc91f1b | 4242 | |
0f2d19dd | 4243 | long_long |
6e8d25a6 | 4244 | scm_num2long_long (SCM num, char *pos, const char *s_caller) |
0f2d19dd | 4245 | { |
98cb6e75 DH |
4246 | if (SCM_INUMP (num)) { |
4247 | return SCM_INUM (num); | |
4248 | } else if (SCM_BIGP (num)) { | |
4249 | long long res; | |
4250 | /* can't use res directly in case num is -2^63. */ | |
4251 | unsigned long long int pos_res = 0; | |
4252 | unsigned long long int old_res = 0; | |
4253 | scm_sizet l; | |
4254 | ||
4255 | for (l = SCM_NUMDIGS (num); l--;) { | |
4256 | pos_res = SCM_LONGLONGBIGUP (pos_res) + SCM_BDIGITS (num)[l]; | |
4257 | if (pos_res >= old_res) { | |
4258 | old_res = pos_res; | |
4259 | } else { | |
4260 | /* overflow. */ | |
4261 | scm_out_of_range (s_caller, num); | |
4262 | } | |
0f2d19dd | 4263 | } |
98cb6e75 DH |
4264 | if (SCM_BIGSIGN (num)) { |
4265 | res = -pos_res; | |
4266 | if (res <= 0) { | |
4267 | return res; | |
4268 | } else { | |
4269 | scm_out_of_range (s_caller, num); | |
4270 | } | |
4271 | } else { | |
4272 | res = pos_res; | |
4273 | if (res >= 0) { | |
4274 | return res; | |
4275 | } else { | |
4276 | scm_out_of_range (s_caller, num); | |
4277 | } | |
f872b822 | 4278 | } |
98cb6e75 DH |
4279 | } else if (SCM_REALP (num)) { |
4280 | double u = SCM_REAL_VALUE (num); | |
4281 | long long int res = u; | |
4282 | if ((double) res == u) { | |
f872b822 | 4283 | return res; |
98cb6e75 DH |
4284 | } else { |
4285 | scm_out_of_range (s_caller, num); | |
f872b822 | 4286 | } |
98cb6e75 DH |
4287 | } else { |
4288 | scm_wrong_type_arg (s_caller, (int) pos, num); | |
4289 | } | |
0f2d19dd | 4290 | } |
0f2d19dd | 4291 | |
98cb6e75 | 4292 | #endif |
0f2d19dd | 4293 | |
1cc91f1b | 4294 | |
0f2d19dd | 4295 | unsigned long |
6e8d25a6 | 4296 | scm_num2ulong (SCM num, char *pos, const char *s_caller) |
0f2d19dd | 4297 | { |
98cb6e75 DH |
4298 | if (SCM_INUMP (num)) { |
4299 | long nnum = SCM_INUM (num); | |
4300 | if (nnum >= 0) { | |
4301 | return nnum; | |
4302 | } else { | |
4303 | scm_out_of_range (s_caller, num); | |
4304 | } | |
4305 | } else if (SCM_BIGP (num)) { | |
4306 | unsigned long int res = 0; | |
4307 | unsigned long int old_res = 0; | |
4308 | scm_sizet l; | |
4309 | ||
4310 | for (l = SCM_NUMDIGS (num); l--;) { | |
4311 | res = SCM_BIGUP (res) + SCM_BDIGITS (num)[l]; | |
4312 | if (res >= old_res) { | |
4313 | old_res = res; | |
4314 | } else { | |
4315 | scm_out_of_range (s_caller, num); | |
4316 | } | |
0f2d19dd | 4317 | } |
98cb6e75 DH |
4318 | return res; |
4319 | } else if (SCM_REALP (num)) { | |
4320 | double u = SCM_REAL_VALUE (num); | |
4321 | unsigned long int res = u; | |
4322 | if ((double) res == u) { | |
f872b822 | 4323 | return res; |
98cb6e75 DH |
4324 | } else { |
4325 | scm_out_of_range (s_caller, num); | |
f872b822 | 4326 | } |
98cb6e75 DH |
4327 | } else { |
4328 | scm_wrong_type_arg (s_caller, (int) pos, num); | |
4329 | } | |
0f2d19dd JB |
4330 | } |
4331 | ||
4332 | ||
0f2d19dd JB |
4333 | void |
4334 | scm_init_numbers () | |
0f2d19dd | 4335 | { |
f3ae5d60 MD |
4336 | scm_add_feature ("complex"); |
4337 | scm_add_feature ("inexact"); | |
5986c47d | 4338 | scm_flo0 = scm_make_real (0.0); |
f872b822 | 4339 | #ifdef DBL_DIG |
0f2d19dd | 4340 | scm_dblprec = (DBL_DIG > 20) ? 20 : DBL_DIG; |
f872b822 | 4341 | #else |
0f2d19dd JB |
4342 | { /* determine floating point precision */ |
4343 | double f = 0.1; | |
f872b822 | 4344 | double fsum = 1.0 + f; |
bb628794 DH |
4345 | while (fsum != 1.0) { |
4346 | if (++scm_dblprec > 20) { | |
4347 | fsum = 1.0; | |
4348 | } else { | |
f872b822 | 4349 | f /= 10.0; |
bb628794 | 4350 | fsum = f + 1.0; |
f872b822 | 4351 | } |
bb628794 | 4352 | } |
f872b822 | 4353 | scm_dblprec = scm_dblprec - 1; |
0f2d19dd | 4354 | } |
f872b822 | 4355 | #endif /* DBL_DIG */ |
a0599745 | 4356 | #include "libguile/numbers.x" |
0f2d19dd | 4357 | } |
89e00824 ML |
4358 | |
4359 | /* | |
4360 | Local Variables: | |
4361 | c-file-style: "gnu" | |
4362 | End: | |
4363 | */ |