Commit | Line | Data |
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238ebcef | 1 | /* Copyright (C) 1995,1996,1997,1998,1999,2000,2001,2002,2003,2004 Free Software Foundation, Inc. |
ba74ef4e MV |
2 | * |
3 | * Portions Copyright 1990, 1991, 1992, 1993 by AT&T Bell Laboratories | |
4 | * and Bellcore. See scm_divide. | |
5 | * | |
f81e080b | 6 | * |
73be1d9e MV |
7 | * This library is free software; you can redistribute it and/or |
8 | * modify it under the terms of the GNU Lesser General Public | |
9 | * License as published by the Free Software Foundation; either | |
10 | * version 2.1 of the License, or (at your option) any later version. | |
0f2d19dd | 11 | * |
73be1d9e MV |
12 | * This library is distributed in the hope that it will be useful, |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
15 | * Lesser General Public License for more details. | |
0f2d19dd | 16 | * |
73be1d9e MV |
17 | * You should have received a copy of the GNU Lesser General Public |
18 | * License along with this library; if not, write to the Free Software | |
19 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
20 | */ | |
1bbd0b84 | 21 | |
0f2d19dd | 22 | \f |
ca46fb90 RB |
23 | /* General assumptions: |
24 | * All objects satisfying SCM_COMPLEXP() have a non-zero complex component. | |
25 | * All objects satisfying SCM_BIGP() are too large to fit in a fixnum. | |
26 | * If an object satisfies integer?, it's either an inum, a bignum, or a real. | |
27 | * If floor (r) == r, r is an int, and mpz_set_d will DTRT. | |
f92e85f7 | 28 | * All objects satisfying SCM_FRACTIONP are never an integer. |
ca46fb90 RB |
29 | */ |
30 | ||
31 | /* TODO: | |
32 | ||
33 | - see if special casing bignums and reals in integer-exponent when | |
34 | possible (to use mpz_pow and mpf_pow_ui) is faster. | |
35 | ||
36 | - look in to better short-circuiting of common cases in | |
37 | integer-expt and elsewhere. | |
38 | ||
39 | - see if direct mpz operations can help in ash and elsewhere. | |
40 | ||
41 | */ | |
0f2d19dd | 42 | |
fa605590 KR |
43 | /* tell glibc (2.3) to give prototype for C99 trunc() */ |
44 | #define _GNU_SOURCE | |
45 | ||
ee33d62a RB |
46 | #if HAVE_CONFIG_H |
47 | # include <config.h> | |
48 | #endif | |
49 | ||
0f2d19dd | 50 | #include <math.h> |
3c9a524f | 51 | #include <ctype.h> |
fc194577 | 52 | #include <string.h> |
ca46fb90 | 53 | #include <gmp.h> |
f92e85f7 | 54 | |
a0599745 | 55 | #include "libguile/_scm.h" |
a0599745 MD |
56 | #include "libguile/feature.h" |
57 | #include "libguile/ports.h" | |
58 | #include "libguile/root.h" | |
59 | #include "libguile/smob.h" | |
60 | #include "libguile/strings.h" | |
a0599745 MD |
61 | |
62 | #include "libguile/validate.h" | |
63 | #include "libguile/numbers.h" | |
1be6b49c | 64 | #include "libguile/deprecation.h" |
f4c627b3 | 65 | |
f92e85f7 MV |
66 | #include "libguile/eq.h" |
67 | ||
0f2d19dd | 68 | \f |
f4c627b3 | 69 | |
ca46fb90 RB |
70 | /* |
71 | Wonder if this might be faster for some of our code? A switch on | |
72 | the numtag would jump directly to the right case, and the | |
73 | SCM_I_NUMTAG code might be faster than repeated SCM_FOOP tests... | |
74 | ||
75 | #define SCM_I_NUMTAG_NOTNUM 0 | |
76 | #define SCM_I_NUMTAG_INUM 1 | |
77 | #define SCM_I_NUMTAG_BIG scm_tc16_big | |
78 | #define SCM_I_NUMTAG_REAL scm_tc16_real | |
79 | #define SCM_I_NUMTAG_COMPLEX scm_tc16_complex | |
80 | #define SCM_I_NUMTAG(x) \ | |
81 | (SCM_INUMP(x) ? SCM_I_NUMTAG_INUM \ | |
82 | : (SCM_IMP(x) ? SCM_I_NUMTAG_NOTNUM \ | |
534c55a9 | 83 | : (((0xfcff & SCM_CELL_TYPE (x)) == scm_tc7_number) ? SCM_TYP16(x) \ |
ca46fb90 RB |
84 | : SCM_I_NUMTAG_NOTNUM))) |
85 | */ | |
f92e85f7 | 86 | /* the macro above will not work as is with fractions */ |
f4c627b3 DH |
87 | |
88 | ||
34d19ef6 | 89 | #define SCM_SWAP(x, y) do { SCM __t = x; x = y; y = __t; } while (0) |
09fb7599 | 90 | |
56e55ac7 | 91 | /* FLOBUFLEN is the maximum number of characters neccessary for the |
3a9809df DH |
92 | * printed or scm_string representation of an inexact number. |
93 | */ | |
0b799eea | 94 | #define FLOBUFLEN (40+2*(sizeof(double)/sizeof(char)*SCM_CHAR_BIT*3+9)/10) |
3a9809df | 95 | |
7351e207 MV |
96 | #if defined (SCO) |
97 | #if ! defined (HAVE_ISNAN) | |
98 | #define HAVE_ISNAN | |
99 | static int | |
100 | isnan (double x) | |
101 | { | |
102 | return (IsNANorINF (x) && NaN (x) && ! IsINF (x)) ? 1 : 0; | |
103 | } | |
0f2d19dd | 104 | #endif |
7351e207 MV |
105 | #if ! defined (HAVE_ISINF) |
106 | #define HAVE_ISINF | |
107 | static int | |
108 | isinf (double x) | |
109 | { | |
110 | return (IsNANorINF (x) && IsINF (x)) ? 1 : 0; | |
111 | } | |
0f2d19dd | 112 | |
7351e207 | 113 | #endif |
e6f3ef58 MD |
114 | #endif |
115 | ||
b127c712 KR |
116 | |
117 | /* mpz_cmp_d only recognises infinities in gmp 4.2 and up. | |
118 | For prior versions use an explicit check here. */ | |
119 | #if __GNU_MP_VERSION < 4 \ | |
120 | || (__GNU_MP_VERSION == 4 && __GNU_MP_VERSION_MINOR < 2) | |
121 | #define xmpz_cmp_d(z, d) \ | |
122 | (xisinf (d) ? (d < 0.0 ? 1 : -1) : mpz_cmp_d (z, d)) | |
123 | #else | |
124 | #define xmpz_cmp_d(z, d) mpz_cmp_d (z, d) | |
125 | #endif | |
126 | ||
a98ce907 KR |
127 | /* For reference, sparc solaris 7 has infinities (IEEE) but doesn't have |
128 | isinf. It does have finite and isnan though, hence the use of those. | |
129 | fpclass would be a possibility on that system too. */ | |
f92e85f7 MV |
130 | static int |
131 | xisinf (double x) | |
132 | { | |
133 | #if defined (HAVE_ISINF) | |
134 | return isinf (x); | |
135 | #elif defined (HAVE_FINITE) && defined (HAVE_ISNAN) | |
136 | return (! (finite (x) || isnan (x))); | |
137 | #else | |
138 | return 0; | |
139 | #endif | |
140 | } | |
141 | ||
142 | static int | |
143 | xisnan (double x) | |
144 | { | |
145 | #if defined (HAVE_ISNAN) | |
146 | return isnan (x); | |
147 | #else | |
148 | return 0; | |
149 | #endif | |
150 | } | |
151 | ||
0f2d19dd JB |
152 | \f |
153 | ||
713a4259 | 154 | static mpz_t z_negative_one; |
ac0c002c DH |
155 | |
156 | \f | |
157 | ||
570b6821 | 158 | SCM_C_INLINE_KEYWORD SCM |
ca46fb90 RB |
159 | scm_i_mkbig () |
160 | { | |
161 | /* Return a newly created bignum. */ | |
162 | SCM z = scm_double_cell (scm_tc16_big, 0, 0, 0); | |
163 | mpz_init (SCM_I_BIG_MPZ (z)); | |
164 | return z; | |
165 | } | |
166 | ||
570b6821 | 167 | SCM_C_INLINE_KEYWORD static SCM |
ca46fb90 RB |
168 | scm_i_clonebig (SCM src_big, int same_sign_p) |
169 | { | |
170 | /* Copy src_big's value, negate it if same_sign_p is false, and return. */ | |
171 | SCM z = scm_double_cell (scm_tc16_big, 0, 0, 0); | |
172 | mpz_init_set (SCM_I_BIG_MPZ (z), SCM_I_BIG_MPZ (src_big)); | |
0aacf84e MD |
173 | if (!same_sign_p) |
174 | mpz_neg (SCM_I_BIG_MPZ (z), SCM_I_BIG_MPZ (z)); | |
ca46fb90 RB |
175 | return z; |
176 | } | |
177 | ||
570b6821 | 178 | SCM_C_INLINE_KEYWORD int |
ca46fb90 RB |
179 | scm_i_bigcmp (SCM x, SCM y) |
180 | { | |
181 | /* Return neg if x < y, pos if x > y, and 0 if x == y */ | |
182 | /* presume we already know x and y are bignums */ | |
183 | int result = mpz_cmp (SCM_I_BIG_MPZ (x), SCM_I_BIG_MPZ (y)); | |
184 | scm_remember_upto_here_2 (x, y); | |
185 | return result; | |
186 | } | |
187 | ||
570b6821 | 188 | SCM_C_INLINE_KEYWORD SCM |
ca46fb90 RB |
189 | scm_i_dbl2big (double d) |
190 | { | |
191 | /* results are only defined if d is an integer */ | |
192 | SCM z = scm_double_cell (scm_tc16_big, 0, 0, 0); | |
193 | mpz_init_set_d (SCM_I_BIG_MPZ (z), d); | |
194 | return z; | |
195 | } | |
196 | ||
f92e85f7 MV |
197 | /* Convert a integer in double representation to a SCM number. */ |
198 | ||
199 | SCM_C_INLINE_KEYWORD SCM | |
200 | scm_i_dbl2num (double u) | |
201 | { | |
202 | /* SCM_MOST_POSITIVE_FIXNUM+1 and SCM_MOST_NEGATIVE_FIXNUM are both | |
203 | powers of 2, so there's no rounding when making "double" values | |
204 | from them. If plain SCM_MOST_POSITIVE_FIXNUM was used it could | |
205 | get rounded on a 64-bit machine, hence the "+1". | |
206 | ||
207 | The use of floor() to force to an integer value ensures we get a | |
208 | "numerically closest" value without depending on how a | |
209 | double->long cast or how mpz_set_d will round. For reference, | |
210 | double->long probably follows the hardware rounding mode, | |
211 | mpz_set_d truncates towards zero. */ | |
212 | ||
213 | /* XXX - what happens when SCM_MOST_POSITIVE_FIXNUM etc is not | |
214 | representable as a double? */ | |
215 | ||
216 | if (u < (double) (SCM_MOST_POSITIVE_FIXNUM+1) | |
217 | && u >= (double) SCM_MOST_NEGATIVE_FIXNUM) | |
d956fa6f | 218 | return SCM_I_MAKINUM ((long) u); |
f92e85f7 MV |
219 | else |
220 | return scm_i_dbl2big (u); | |
221 | } | |
222 | ||
089c9a59 KR |
223 | /* scm_i_big2dbl() rounds to the closest representable double, in accordance |
224 | with R5RS exact->inexact. | |
225 | ||
226 | The approach is to use mpz_get_d to pick out the high DBL_MANT_DIG bits | |
227 | (ie. it truncates towards zero), then adjust to get the closest double by | |
228 | examining the next lower bit and adding 1 if necessary. | |
229 | ||
230 | Note that bignums exactly half way between representable doubles are | |
231 | rounded to the next higher absolute value (ie. away from zero). This | |
232 | seems like an adequate interpretation of R5RS "numerically closest", and | |
233 | it's easier and faster than a full "nearest-even" style. | |
234 | ||
235 | The bit test is done on the absolute value of the mpz_t, which means we | |
236 | must use mpz_getlimbn. mpz_tstbit is not right, it treats negatives as | |
237 | twos complement. | |
238 | ||
239 | Prior to GMP 4.2, the rounding done by mpz_get_d was unspecified. It | |
240 | happened to follow the hardware rounding mode, but on the absolute value | |
241 | of its operand. This is not what we want, so we put the high | |
242 | DBL_MANT_DIG bits into a temporary. This extra init/clear is a slowdown, | |
243 | but doesn't matter too much since it's only for older GMP. */ | |
244 | ||
245 | double | |
ca46fb90 RB |
246 | scm_i_big2dbl (SCM b) |
247 | { | |
089c9a59 KR |
248 | double result; |
249 | size_t bits; | |
250 | ||
251 | bits = mpz_sizeinbase (SCM_I_BIG_MPZ (b), 2); | |
252 | ||
253 | #if __GNU_MP_VERSION < 4 \ | |
254 | || (__GNU_MP_VERSION == 4 && __GNU_MP_VERSION_MINOR < 2) | |
255 | { | |
256 | /* GMP prior to 4.2, force truncate towards zero */ | |
257 | mpz_t tmp; | |
258 | if (bits > DBL_MANT_DIG) | |
259 | { | |
260 | size_t shift = bits - DBL_MANT_DIG; | |
261 | mpz_init2 (tmp, DBL_MANT_DIG); | |
262 | mpz_tdiv_q_2exp (tmp, SCM_I_BIG_MPZ (b), shift); | |
263 | result = ldexp (mpz_get_d (tmp), shift); | |
264 | mpz_clear (tmp); | |
265 | } | |
266 | else | |
267 | { | |
268 | result = mpz_get_d (SCM_I_BIG_MPZ (b)); | |
269 | } | |
270 | } | |
271 | #else | |
272 | /* GMP 4.2 and up */ | |
273 | result = mpz_get_d (SCM_I_BIG_MPZ (b)); | |
274 | #endif | |
275 | ||
276 | if (bits > DBL_MANT_DIG) | |
277 | { | |
278 | unsigned long pos = bits - DBL_MANT_DIG - 1; | |
279 | /* test bit number "pos" in absolute value */ | |
280 | if (mpz_getlimbn (SCM_I_BIG_MPZ (b), pos / GMP_NUMB_BITS) | |
281 | & ((mp_limb_t) 1 << (pos % GMP_NUMB_BITS))) | |
282 | { | |
283 | result += ldexp ((double) mpz_sgn (SCM_I_BIG_MPZ (b)), pos + 1); | |
284 | } | |
285 | } | |
286 | ||
ca46fb90 RB |
287 | scm_remember_upto_here_1 (b); |
288 | return result; | |
289 | } | |
290 | ||
570b6821 | 291 | SCM_C_INLINE_KEYWORD SCM |
ca46fb90 RB |
292 | scm_i_normbig (SCM b) |
293 | { | |
294 | /* convert a big back to a fixnum if it'll fit */ | |
295 | /* presume b is a bignum */ | |
296 | if (mpz_fits_slong_p (SCM_I_BIG_MPZ (b))) | |
297 | { | |
298 | long val = mpz_get_si (SCM_I_BIG_MPZ (b)); | |
299 | if (SCM_FIXABLE (val)) | |
d956fa6f | 300 | b = SCM_I_MAKINUM (val); |
ca46fb90 RB |
301 | } |
302 | return b; | |
303 | } | |
f872b822 | 304 | |
f92e85f7 MV |
305 | static SCM_C_INLINE_KEYWORD SCM |
306 | scm_i_mpz2num (mpz_t b) | |
307 | { | |
308 | /* convert a mpz number to a SCM number. */ | |
309 | if (mpz_fits_slong_p (b)) | |
310 | { | |
311 | long val = mpz_get_si (b); | |
312 | if (SCM_FIXABLE (val)) | |
d956fa6f | 313 | return SCM_I_MAKINUM (val); |
f92e85f7 MV |
314 | } |
315 | ||
316 | { | |
317 | SCM z = scm_double_cell (scm_tc16_big, 0, 0, 0); | |
318 | mpz_init_set (SCM_I_BIG_MPZ (z), b); | |
319 | return z; | |
320 | } | |
321 | } | |
322 | ||
323 | /* this is needed when we want scm_divide to make a float, not a ratio, even if passed two ints */ | |
324 | static SCM scm_divide2real (SCM x, SCM y); | |
325 | ||
326 | SCM | |
327 | scm_make_ratio (SCM numerator, SCM denominator) | |
c60e130c | 328 | #define FUNC_NAME "make-ratio" |
f92e85f7 | 329 | { |
c60e130c MV |
330 | /* First make sure the arguments are proper. |
331 | */ | |
f92e85f7 MV |
332 | if (SCM_INUMP (denominator)) |
333 | { | |
334 | if (SCM_EQ_P (denominator, SCM_INUM0)) | |
335 | scm_num_overflow ("make-ratio"); | |
d956fa6f | 336 | if (SCM_EQ_P (denominator, SCM_I_MAKINUM(1))) |
f92e85f7 MV |
337 | return numerator; |
338 | } | |
339 | else | |
340 | { | |
341 | if (!(SCM_BIGP(denominator))) | |
342 | SCM_WRONG_TYPE_ARG (2, denominator); | |
343 | } | |
c60e130c MV |
344 | if (!SCM_INUMP (numerator) && !SCM_BIGP (numerator)) |
345 | SCM_WRONG_TYPE_ARG (1, numerator); | |
346 | ||
347 | /* Then flip signs so that the denominator is positive. | |
348 | */ | |
73e4de09 | 349 | if (scm_is_true (scm_negative_p (denominator))) |
c60e130c MV |
350 | { |
351 | numerator = scm_difference (numerator, SCM_UNDEFINED); | |
352 | denominator = scm_difference (denominator, SCM_UNDEFINED); | |
353 | } | |
354 | ||
355 | /* Now consider for each of the four fixnum/bignum combinations | |
356 | whether the rational number is really an integer. | |
357 | */ | |
f92e85f7 MV |
358 | if (SCM_INUMP (numerator)) |
359 | { | |
dd5130ca | 360 | long x = SCM_INUM (numerator); |
f92e85f7 MV |
361 | if (SCM_EQ_P (numerator, SCM_INUM0)) |
362 | return SCM_INUM0; | |
363 | if (SCM_INUMP (denominator)) | |
364 | { | |
dd5130ca | 365 | long y; |
f92e85f7 MV |
366 | y = SCM_INUM (denominator); |
367 | if (x == y) | |
d956fa6f | 368 | return SCM_I_MAKINUM(1); |
f92e85f7 | 369 | if ((x % y) == 0) |
d956fa6f | 370 | return SCM_I_MAKINUM (x / y); |
f92e85f7 | 371 | } |
dd5130ca KR |
372 | else |
373 | { | |
374 | /* When x == SCM_MOST_NEGATIVE_FIXNUM we could have the negative | |
3271a325 KR |
375 | of that value for the denominator, as a bignum. Apart from |
376 | that case, abs(bignum) > abs(inum) so inum/bignum is not an | |
377 | integer. */ | |
378 | if (x == SCM_MOST_NEGATIVE_FIXNUM | |
379 | && mpz_cmp_ui (SCM_I_BIG_MPZ (denominator), | |
380 | - SCM_MOST_NEGATIVE_FIXNUM) == 0) | |
d956fa6f | 381 | return SCM_I_MAKINUM(-1); |
dd5130ca | 382 | } |
f92e85f7 | 383 | } |
c60e130c | 384 | else if (SCM_BIGP (numerator)) |
f92e85f7 | 385 | { |
c60e130c MV |
386 | if (SCM_INUMP (denominator)) |
387 | { | |
388 | long yy = SCM_INUM (denominator); | |
389 | if (mpz_divisible_ui_p (SCM_I_BIG_MPZ (numerator), yy)) | |
390 | return scm_divide (numerator, denominator); | |
391 | } | |
392 | else | |
f92e85f7 | 393 | { |
c60e130c | 394 | if (SCM_EQ_P (numerator, denominator)) |
d956fa6f | 395 | return SCM_I_MAKINUM(1); |
c60e130c MV |
396 | if (mpz_divisible_p (SCM_I_BIG_MPZ (numerator), |
397 | SCM_I_BIG_MPZ (denominator))) | |
398 | return scm_divide(numerator, denominator); | |
f92e85f7 | 399 | } |
f92e85f7 | 400 | } |
c60e130c MV |
401 | |
402 | /* No, it's a proper fraction. | |
403 | */ | |
404 | return scm_double_cell (scm_tc16_fraction, | |
405 | SCM_UNPACK (numerator), | |
406 | SCM_UNPACK (denominator), 0); | |
f92e85f7 | 407 | } |
c60e130c | 408 | #undef FUNC_NAME |
f92e85f7 MV |
409 | |
410 | static void scm_i_fraction_reduce (SCM z) | |
411 | { | |
412 | if (!(SCM_FRACTION_REDUCED (z))) | |
413 | { | |
414 | SCM divisor; | |
415 | divisor = scm_gcd (SCM_FRACTION_NUMERATOR (z), SCM_FRACTION_DENOMINATOR (z)); | |
d956fa6f | 416 | if (!(SCM_EQ_P (divisor, SCM_I_MAKINUM(1)))) |
f92e85f7 MV |
417 | { |
418 | /* is this safe? */ | |
419 | SCM_FRACTION_SET_NUMERATOR (z, scm_divide (SCM_FRACTION_NUMERATOR (z), divisor)); | |
420 | SCM_FRACTION_SET_DENOMINATOR (z, scm_divide (SCM_FRACTION_DENOMINATOR (z), divisor)); | |
421 | } | |
422 | SCM_FRACTION_REDUCED_SET (z); | |
423 | } | |
424 | } | |
425 | ||
426 | double | |
427 | scm_i_fraction2double (SCM z) | |
428 | { | |
429 | return scm_num2dbl (scm_divide2real (SCM_FRACTION_NUMERATOR (z), | |
430 | SCM_FRACTION_DENOMINATOR (z)), | |
431 | "fraction2real"); | |
432 | } | |
433 | ||
a1ec6916 | 434 | SCM_DEFINE (scm_exact_p, "exact?", 1, 0, 0, |
1bbd0b84 | 435 | (SCM x), |
942e5b91 MG |
436 | "Return @code{#t} if @var{x} is an exact number, @code{#f}\n" |
437 | "otherwise.") | |
1bbd0b84 | 438 | #define FUNC_NAME s_scm_exact_p |
0f2d19dd | 439 | { |
0aacf84e MD |
440 | if (SCM_INUMP (x)) |
441 | return SCM_BOOL_T; | |
442 | if (SCM_BIGP (x)) | |
443 | return SCM_BOOL_T; | |
f92e85f7 MV |
444 | if (SCM_FRACTIONP (x)) |
445 | return SCM_BOOL_T; | |
eb927cb9 MV |
446 | if (SCM_NUMBERP (x)) |
447 | return SCM_BOOL_F; | |
448 | SCM_WRONG_TYPE_ARG (1, x); | |
0f2d19dd | 449 | } |
1bbd0b84 | 450 | #undef FUNC_NAME |
0f2d19dd | 451 | |
4219f20d | 452 | |
a1ec6916 | 453 | SCM_DEFINE (scm_odd_p, "odd?", 1, 0, 0, |
1bbd0b84 | 454 | (SCM n), |
942e5b91 MG |
455 | "Return @code{#t} if @var{n} is an odd number, @code{#f}\n" |
456 | "otherwise.") | |
1bbd0b84 | 457 | #define FUNC_NAME s_scm_odd_p |
0f2d19dd | 458 | { |
0aacf84e MD |
459 | if (SCM_INUMP (n)) |
460 | { | |
461 | long val = SCM_INUM (n); | |
73e4de09 | 462 | return scm_from_bool ((val & 1L) != 0); |
0aacf84e MD |
463 | } |
464 | else if (SCM_BIGP (n)) | |
465 | { | |
466 | int odd_p = mpz_odd_p (SCM_I_BIG_MPZ (n)); | |
467 | scm_remember_upto_here_1 (n); | |
73e4de09 | 468 | return scm_from_bool (odd_p); |
0aacf84e | 469 | } |
73e4de09 | 470 | else if (scm_is_true (scm_inf_p (n))) |
7351e207 | 471 | return SCM_BOOL_T; |
f92e85f7 MV |
472 | else if (SCM_REALP (n)) |
473 | { | |
474 | double rem = fabs (fmod (SCM_REAL_VALUE(n), 2.0)); | |
475 | if (rem == 1.0) | |
476 | return SCM_BOOL_T; | |
477 | else if (rem == 0.0) | |
478 | return SCM_BOOL_F; | |
479 | else | |
480 | SCM_WRONG_TYPE_ARG (1, n); | |
481 | } | |
0aacf84e | 482 | else |
a1a33b0f | 483 | SCM_WRONG_TYPE_ARG (1, n); |
0f2d19dd | 484 | } |
1bbd0b84 | 485 | #undef FUNC_NAME |
0f2d19dd | 486 | |
4219f20d | 487 | |
a1ec6916 | 488 | SCM_DEFINE (scm_even_p, "even?", 1, 0, 0, |
1bbd0b84 | 489 | (SCM n), |
942e5b91 MG |
490 | "Return @code{#t} if @var{n} is an even number, @code{#f}\n" |
491 | "otherwise.") | |
1bbd0b84 | 492 | #define FUNC_NAME s_scm_even_p |
0f2d19dd | 493 | { |
0aacf84e MD |
494 | if (SCM_INUMP (n)) |
495 | { | |
496 | long val = SCM_INUM (n); | |
73e4de09 | 497 | return scm_from_bool ((val & 1L) == 0); |
0aacf84e MD |
498 | } |
499 | else if (SCM_BIGP (n)) | |
500 | { | |
501 | int even_p = mpz_even_p (SCM_I_BIG_MPZ (n)); | |
502 | scm_remember_upto_here_1 (n); | |
73e4de09 | 503 | return scm_from_bool (even_p); |
0aacf84e | 504 | } |
73e4de09 | 505 | else if (scm_is_true (scm_inf_p (n))) |
7351e207 | 506 | return SCM_BOOL_T; |
f92e85f7 MV |
507 | else if (SCM_REALP (n)) |
508 | { | |
509 | double rem = fabs (fmod (SCM_REAL_VALUE(n), 2.0)); | |
510 | if (rem == 1.0) | |
511 | return SCM_BOOL_F; | |
512 | else if (rem == 0.0) | |
513 | return SCM_BOOL_T; | |
514 | else | |
515 | SCM_WRONG_TYPE_ARG (1, n); | |
516 | } | |
0aacf84e | 517 | else |
a1a33b0f | 518 | SCM_WRONG_TYPE_ARG (1, n); |
0f2d19dd | 519 | } |
1bbd0b84 | 520 | #undef FUNC_NAME |
0f2d19dd | 521 | |
7351e207 MV |
522 | SCM_DEFINE (scm_inf_p, "inf?", 1, 0, 0, |
523 | (SCM n), | |
524 | "Return @code{#t} if @var{n} is infinite, @code{#f}\n" | |
525 | "otherwise.") | |
526 | #define FUNC_NAME s_scm_inf_p | |
527 | { | |
0aacf84e | 528 | if (SCM_REALP (n)) |
73e4de09 | 529 | return scm_from_bool (xisinf (SCM_REAL_VALUE (n))); |
0aacf84e | 530 | else if (SCM_COMPLEXP (n)) |
73e4de09 | 531 | return scm_from_bool (xisinf (SCM_COMPLEX_REAL (n)) |
7351e207 | 532 | || xisinf (SCM_COMPLEX_IMAG (n))); |
0aacf84e | 533 | else |
7351e207 | 534 | return SCM_BOOL_F; |
7351e207 MV |
535 | } |
536 | #undef FUNC_NAME | |
537 | ||
538 | SCM_DEFINE (scm_nan_p, "nan?", 1, 0, 0, | |
539 | (SCM n), | |
540 | "Return @code{#t} if @var{n} is a NaN, @code{#f}\n" | |
541 | "otherwise.") | |
542 | #define FUNC_NAME s_scm_nan_p | |
543 | { | |
0aacf84e | 544 | if (SCM_REALP (n)) |
73e4de09 | 545 | return scm_from_bool (xisnan (SCM_REAL_VALUE (n))); |
0aacf84e | 546 | else if (SCM_COMPLEXP (n)) |
73e4de09 | 547 | return scm_from_bool (xisnan (SCM_COMPLEX_REAL (n)) |
7351e207 | 548 | || xisnan (SCM_COMPLEX_IMAG (n))); |
0aacf84e | 549 | else |
7351e207 | 550 | return SCM_BOOL_F; |
7351e207 MV |
551 | } |
552 | #undef FUNC_NAME | |
553 | ||
554 | /* Guile's idea of infinity. */ | |
555 | static double guile_Inf; | |
556 | ||
557 | /* Guile's idea of not a number. */ | |
558 | static double guile_NaN; | |
559 | ||
560 | static void | |
561 | guile_ieee_init (void) | |
562 | { | |
563 | #if defined (HAVE_ISINF) || defined (HAVE_FINITE) | |
564 | ||
565 | /* Some version of gcc on some old version of Linux used to crash when | |
566 | trying to make Inf and NaN. */ | |
567 | ||
240a27d2 KR |
568 | #ifdef INFINITY |
569 | /* C99 INFINITY, when available. | |
570 | FIXME: The standard allows for INFINITY to be something that overflows | |
571 | at compile time. We ought to have a configure test to check for that | |
572 | before trying to use it. (But in practice we believe this is not a | |
573 | problem on any system guile is likely to target.) */ | |
574 | guile_Inf = INFINITY; | |
575 | #elif HAVE_DINFINITY | |
576 | /* OSF */ | |
7351e207 MV |
577 | extern unsigned int DINFINITY[2]; |
578 | guile_Inf = (*(X_CAST(double *, DINFINITY))); | |
579 | #else | |
580 | double tmp = 1e+10; | |
581 | guile_Inf = tmp; | |
582 | for (;;) | |
583 | { | |
584 | guile_Inf *= 1e+10; | |
585 | if (guile_Inf == tmp) | |
586 | break; | |
587 | tmp = guile_Inf; | |
588 | } | |
589 | #endif | |
590 | ||
591 | #endif | |
592 | ||
593 | #if defined (HAVE_ISNAN) | |
594 | ||
240a27d2 KR |
595 | #ifdef NAN |
596 | /* C99 NAN, when available */ | |
597 | guile_NaN = NAN; | |
598 | #elif HAVE_DQNAN | |
599 | /* OSF */ | |
7351e207 MV |
600 | extern unsigned int DQNAN[2]; |
601 | guile_NaN = (*(X_CAST(double *, DQNAN))); | |
602 | #else | |
603 | guile_NaN = guile_Inf / guile_Inf; | |
604 | #endif | |
605 | ||
606 | #endif | |
607 | } | |
608 | ||
609 | SCM_DEFINE (scm_inf, "inf", 0, 0, 0, | |
610 | (void), | |
611 | "Return Inf.") | |
612 | #define FUNC_NAME s_scm_inf | |
613 | { | |
614 | static int initialized = 0; | |
615 | if (! initialized) | |
616 | { | |
617 | guile_ieee_init (); | |
618 | initialized = 1; | |
619 | } | |
620 | return scm_make_real (guile_Inf); | |
621 | } | |
622 | #undef FUNC_NAME | |
623 | ||
624 | SCM_DEFINE (scm_nan, "nan", 0, 0, 0, | |
625 | (void), | |
626 | "Return NaN.") | |
627 | #define FUNC_NAME s_scm_nan | |
628 | { | |
629 | static int initialized = 0; | |
0aacf84e | 630 | if (!initialized) |
7351e207 MV |
631 | { |
632 | guile_ieee_init (); | |
633 | initialized = 1; | |
634 | } | |
635 | return scm_make_real (guile_NaN); | |
636 | } | |
637 | #undef FUNC_NAME | |
638 | ||
4219f20d | 639 | |
a48d60b1 MD |
640 | SCM_PRIMITIVE_GENERIC (scm_abs, "abs", 1, 0, 0, |
641 | (SCM x), | |
642 | "Return the absolute value of @var{x}.") | |
643 | #define FUNC_NAME | |
0f2d19dd | 644 | { |
0aacf84e MD |
645 | if (SCM_INUMP (x)) |
646 | { | |
647 | long int xx = SCM_INUM (x); | |
648 | if (xx >= 0) | |
649 | return x; | |
650 | else if (SCM_POSFIXABLE (-xx)) | |
d956fa6f | 651 | return SCM_I_MAKINUM (-xx); |
0aacf84e MD |
652 | else |
653 | return scm_i_long2big (-xx); | |
4219f20d | 654 | } |
0aacf84e MD |
655 | else if (SCM_BIGP (x)) |
656 | { | |
657 | const int sgn = mpz_sgn (SCM_I_BIG_MPZ (x)); | |
658 | if (sgn < 0) | |
659 | return scm_i_clonebig (x, 0); | |
660 | else | |
661 | return x; | |
4219f20d | 662 | } |
0aacf84e | 663 | else if (SCM_REALP (x)) |
ae38324d KR |
664 | { |
665 | /* note that if x is a NaN then xx<0 is false so we return x unchanged */ | |
666 | double xx = SCM_REAL_VALUE (x); | |
667 | if (xx < 0.0) | |
668 | return scm_make_real (-xx); | |
669 | else | |
670 | return x; | |
671 | } | |
f92e85f7 MV |
672 | else if (SCM_FRACTIONP (x)) |
673 | { | |
73e4de09 | 674 | if (scm_is_false (scm_negative_p (SCM_FRACTION_NUMERATOR (x)))) |
f92e85f7 MV |
675 | return x; |
676 | return scm_make_ratio (scm_difference (SCM_FRACTION_NUMERATOR (x), SCM_UNDEFINED), | |
677 | SCM_FRACTION_DENOMINATOR (x)); | |
678 | } | |
0aacf84e | 679 | else |
a48d60b1 | 680 | SCM_WTA_DISPATCH_1 (g_scm_abs, x, 1, s_scm_abs); |
0f2d19dd | 681 | } |
a48d60b1 | 682 | #undef FUNC_NAME |
0f2d19dd | 683 | |
4219f20d | 684 | |
9de33deb | 685 | SCM_GPROC (s_quotient, "quotient", 2, 0, 0, scm_quotient, g_quotient); |
942e5b91 MG |
686 | /* "Return the quotient of the numbers @var{x} and @var{y}." |
687 | */ | |
0f2d19dd | 688 | SCM |
6e8d25a6 | 689 | scm_quotient (SCM x, SCM y) |
0f2d19dd | 690 | { |
0aacf84e MD |
691 | if (SCM_INUMP (x)) |
692 | { | |
693 | long xx = SCM_INUM (x); | |
694 | if (SCM_INUMP (y)) | |
695 | { | |
696 | long yy = SCM_INUM (y); | |
697 | if (yy == 0) | |
698 | scm_num_overflow (s_quotient); | |
699 | else | |
700 | { | |
701 | long z = xx / yy; | |
702 | if (SCM_FIXABLE (z)) | |
d956fa6f | 703 | return SCM_I_MAKINUM (z); |
0aacf84e MD |
704 | else |
705 | return scm_i_long2big (z); | |
706 | } | |
828865c3 | 707 | } |
0aacf84e | 708 | else if (SCM_BIGP (y)) |
ac0c002c | 709 | { |
0aacf84e | 710 | if ((SCM_INUM (x) == SCM_MOST_NEGATIVE_FIXNUM) |
4dc09ee4 KR |
711 | && (mpz_cmp_ui (SCM_I_BIG_MPZ (y), |
712 | - SCM_MOST_NEGATIVE_FIXNUM) == 0)) | |
713 | { | |
714 | /* Special case: x == fixnum-min && y == abs (fixnum-min) */ | |
715 | scm_remember_upto_here_1 (y); | |
d956fa6f | 716 | return SCM_I_MAKINUM (-1); |
4dc09ee4 | 717 | } |
0aacf84e | 718 | else |
d956fa6f | 719 | return SCM_I_MAKINUM (0); |
ac0c002c DH |
720 | } |
721 | else | |
0aacf84e | 722 | SCM_WTA_DISPATCH_2 (g_quotient, x, y, SCM_ARG2, s_quotient); |
828865c3 | 723 | } |
0aacf84e MD |
724 | else if (SCM_BIGP (x)) |
725 | { | |
726 | if (SCM_INUMP (y)) | |
727 | { | |
728 | long yy = SCM_INUM (y); | |
729 | if (yy == 0) | |
730 | scm_num_overflow (s_quotient); | |
731 | else if (yy == 1) | |
732 | return x; | |
733 | else | |
734 | { | |
735 | SCM result = scm_i_mkbig (); | |
736 | if (yy < 0) | |
737 | { | |
738 | mpz_tdiv_q_ui (SCM_I_BIG_MPZ (result), | |
739 | SCM_I_BIG_MPZ (x), | |
740 | - yy); | |
741 | mpz_neg (SCM_I_BIG_MPZ (result), SCM_I_BIG_MPZ (result)); | |
742 | } | |
743 | else | |
744 | mpz_tdiv_q_ui (SCM_I_BIG_MPZ (result), SCM_I_BIG_MPZ (x), yy); | |
745 | scm_remember_upto_here_1 (x); | |
746 | return scm_i_normbig (result); | |
747 | } | |
748 | } | |
749 | else if (SCM_BIGP (y)) | |
750 | { | |
751 | SCM result = scm_i_mkbig (); | |
752 | mpz_tdiv_q (SCM_I_BIG_MPZ (result), | |
753 | SCM_I_BIG_MPZ (x), | |
754 | SCM_I_BIG_MPZ (y)); | |
755 | scm_remember_upto_here_2 (x, y); | |
756 | return scm_i_normbig (result); | |
757 | } | |
758 | else | |
759 | SCM_WTA_DISPATCH_2 (g_quotient, x, y, SCM_ARG2, s_quotient); | |
f872b822 | 760 | } |
0aacf84e | 761 | else |
89a7e495 | 762 | SCM_WTA_DISPATCH_2 (g_quotient, x, y, SCM_ARG1, s_quotient); |
0f2d19dd JB |
763 | } |
764 | ||
9de33deb | 765 | SCM_GPROC (s_remainder, "remainder", 2, 0, 0, scm_remainder, g_remainder); |
942e5b91 MG |
766 | /* "Return the remainder of the numbers @var{x} and @var{y}.\n" |
767 | * "@lisp\n" | |
768 | * "(remainder 13 4) @result{} 1\n" | |
769 | * "(remainder -13 4) @result{} -1\n" | |
770 | * "@end lisp" | |
771 | */ | |
0f2d19dd | 772 | SCM |
6e8d25a6 | 773 | scm_remainder (SCM x, SCM y) |
0f2d19dd | 774 | { |
0aacf84e MD |
775 | if (SCM_INUMP (x)) |
776 | { | |
777 | if (SCM_INUMP (y)) | |
778 | { | |
779 | long yy = SCM_INUM (y); | |
780 | if (yy == 0) | |
781 | scm_num_overflow (s_remainder); | |
782 | else | |
783 | { | |
784 | long z = SCM_INUM (x) % yy; | |
d956fa6f | 785 | return SCM_I_MAKINUM (z); |
0aacf84e MD |
786 | } |
787 | } | |
788 | else if (SCM_BIGP (y)) | |
ac0c002c | 789 | { |
0aacf84e | 790 | if ((SCM_INUM (x) == SCM_MOST_NEGATIVE_FIXNUM) |
4dc09ee4 KR |
791 | && (mpz_cmp_ui (SCM_I_BIG_MPZ (y), |
792 | - SCM_MOST_NEGATIVE_FIXNUM) == 0)) | |
793 | { | |
794 | /* Special case: x == fixnum-min && y == abs (fixnum-min) */ | |
795 | scm_remember_upto_here_1 (y); | |
d956fa6f | 796 | return SCM_I_MAKINUM (0); |
4dc09ee4 | 797 | } |
0aacf84e MD |
798 | else |
799 | return x; | |
ac0c002c DH |
800 | } |
801 | else | |
0aacf84e | 802 | SCM_WTA_DISPATCH_2 (g_remainder, x, y, SCM_ARG2, s_remainder); |
89a7e495 | 803 | } |
0aacf84e MD |
804 | else if (SCM_BIGP (x)) |
805 | { | |
806 | if (SCM_INUMP (y)) | |
807 | { | |
808 | long yy = SCM_INUM (y); | |
809 | if (yy == 0) | |
810 | scm_num_overflow (s_remainder); | |
811 | else | |
812 | { | |
813 | SCM result = scm_i_mkbig (); | |
814 | if (yy < 0) | |
815 | yy = - yy; | |
816 | mpz_tdiv_r_ui (SCM_I_BIG_MPZ (result), SCM_I_BIG_MPZ(x), yy); | |
817 | scm_remember_upto_here_1 (x); | |
818 | return scm_i_normbig (result); | |
819 | } | |
820 | } | |
821 | else if (SCM_BIGP (y)) | |
822 | { | |
823 | SCM result = scm_i_mkbig (); | |
824 | mpz_tdiv_r (SCM_I_BIG_MPZ (result), | |
825 | SCM_I_BIG_MPZ (x), | |
826 | SCM_I_BIG_MPZ (y)); | |
827 | scm_remember_upto_here_2 (x, y); | |
828 | return scm_i_normbig (result); | |
829 | } | |
830 | else | |
831 | SCM_WTA_DISPATCH_2 (g_remainder, x, y, SCM_ARG2, s_remainder); | |
f872b822 | 832 | } |
0aacf84e | 833 | else |
89a7e495 | 834 | SCM_WTA_DISPATCH_2 (g_remainder, x, y, SCM_ARG1, s_remainder); |
0f2d19dd JB |
835 | } |
836 | ||
89a7e495 | 837 | |
9de33deb | 838 | SCM_GPROC (s_modulo, "modulo", 2, 0, 0, scm_modulo, g_modulo); |
942e5b91 MG |
839 | /* "Return the modulo of the numbers @var{x} and @var{y}.\n" |
840 | * "@lisp\n" | |
841 | * "(modulo 13 4) @result{} 1\n" | |
842 | * "(modulo -13 4) @result{} 3\n" | |
843 | * "@end lisp" | |
844 | */ | |
0f2d19dd | 845 | SCM |
6e8d25a6 | 846 | scm_modulo (SCM x, SCM y) |
0f2d19dd | 847 | { |
0aacf84e MD |
848 | if (SCM_INUMP (x)) |
849 | { | |
850 | long xx = SCM_INUM (x); | |
851 | if (SCM_INUMP (y)) | |
852 | { | |
853 | long yy = SCM_INUM (y); | |
854 | if (yy == 0) | |
855 | scm_num_overflow (s_modulo); | |
856 | else | |
857 | { | |
858 | /* FIXME: I think this may be a bug on some arches -- results | |
859 | of % with negative second arg are undefined... */ | |
860 | long z = xx % yy; | |
861 | long result; | |
862 | ||
863 | if (yy < 0) | |
864 | { | |
865 | if (z > 0) | |
866 | result = z + yy; | |
867 | else | |
868 | result = z; | |
869 | } | |
870 | else | |
871 | { | |
872 | if (z < 0) | |
873 | result = z + yy; | |
874 | else | |
875 | result = z; | |
876 | } | |
d956fa6f | 877 | return SCM_I_MAKINUM (result); |
0aacf84e MD |
878 | } |
879 | } | |
880 | else if (SCM_BIGP (y)) | |
881 | { | |
882 | int sgn_y = mpz_sgn (SCM_I_BIG_MPZ (y)); | |
0aacf84e MD |
883 | { |
884 | mpz_t z_x; | |
885 | SCM result; | |
886 | ||
887 | if (sgn_y < 0) | |
888 | { | |
889 | SCM pos_y = scm_i_clonebig (y, 0); | |
890 | /* do this after the last scm_op */ | |
891 | mpz_init_set_si (z_x, xx); | |
892 | result = pos_y; /* re-use this bignum */ | |
893 | mpz_mod (SCM_I_BIG_MPZ (result), | |
894 | z_x, | |
895 | SCM_I_BIG_MPZ (pos_y)); | |
896 | scm_remember_upto_here_1 (pos_y); | |
897 | } | |
898 | else | |
899 | { | |
900 | result = scm_i_mkbig (); | |
901 | /* do this after the last scm_op */ | |
902 | mpz_init_set_si (z_x, xx); | |
903 | mpz_mod (SCM_I_BIG_MPZ (result), | |
904 | z_x, | |
905 | SCM_I_BIG_MPZ (y)); | |
906 | scm_remember_upto_here_1 (y); | |
907 | } | |
ca46fb90 | 908 | |
0aacf84e MD |
909 | if ((sgn_y < 0) && mpz_sgn (SCM_I_BIG_MPZ (result)) != 0) |
910 | mpz_add (SCM_I_BIG_MPZ (result), | |
911 | SCM_I_BIG_MPZ (y), | |
912 | SCM_I_BIG_MPZ (result)); | |
913 | scm_remember_upto_here_1 (y); | |
914 | /* and do this before the next one */ | |
915 | mpz_clear (z_x); | |
916 | return scm_i_normbig (result); | |
917 | } | |
918 | } | |
919 | else | |
920 | SCM_WTA_DISPATCH_2 (g_modulo, x, y, SCM_ARG2, s_modulo); | |
f872b822 | 921 | } |
0aacf84e MD |
922 | else if (SCM_BIGP (x)) |
923 | { | |
924 | if (SCM_INUMP (y)) | |
925 | { | |
926 | long yy = SCM_INUM (y); | |
927 | if (yy == 0) | |
928 | scm_num_overflow (s_modulo); | |
929 | else | |
930 | { | |
931 | SCM result = scm_i_mkbig (); | |
932 | mpz_mod_ui (SCM_I_BIG_MPZ (result), | |
933 | SCM_I_BIG_MPZ (x), | |
934 | (yy < 0) ? - yy : yy); | |
935 | scm_remember_upto_here_1 (x); | |
936 | if ((yy < 0) && (mpz_sgn (SCM_I_BIG_MPZ (result)) != 0)) | |
937 | mpz_sub_ui (SCM_I_BIG_MPZ (result), | |
938 | SCM_I_BIG_MPZ (result), | |
939 | - yy); | |
940 | return scm_i_normbig (result); | |
941 | } | |
942 | } | |
943 | else if (SCM_BIGP (y)) | |
944 | { | |
0aacf84e MD |
945 | { |
946 | SCM result = scm_i_mkbig (); | |
947 | int y_sgn = mpz_sgn (SCM_I_BIG_MPZ (y)); | |
948 | SCM pos_y = scm_i_clonebig (y, y_sgn >= 0); | |
949 | mpz_mod (SCM_I_BIG_MPZ (result), | |
950 | SCM_I_BIG_MPZ (x), | |
951 | SCM_I_BIG_MPZ (pos_y)); | |
ca46fb90 | 952 | |
0aacf84e MD |
953 | scm_remember_upto_here_1 (x); |
954 | if ((y_sgn < 0) && (mpz_sgn (SCM_I_BIG_MPZ (result)) != 0)) | |
955 | mpz_add (SCM_I_BIG_MPZ (result), | |
956 | SCM_I_BIG_MPZ (y), | |
957 | SCM_I_BIG_MPZ (result)); | |
958 | scm_remember_upto_here_2 (y, pos_y); | |
959 | return scm_i_normbig (result); | |
960 | } | |
961 | } | |
962 | else | |
963 | SCM_WTA_DISPATCH_2 (g_modulo, x, y, SCM_ARG2, s_modulo); | |
828865c3 | 964 | } |
0aacf84e | 965 | else |
09fb7599 | 966 | SCM_WTA_DISPATCH_2 (g_modulo, x, y, SCM_ARG1, s_modulo); |
0f2d19dd JB |
967 | } |
968 | ||
9de33deb | 969 | SCM_GPROC1 (s_gcd, "gcd", scm_tc7_asubr, scm_gcd, g_gcd); |
942e5b91 MG |
970 | /* "Return the greatest common divisor of all arguments.\n" |
971 | * "If called without arguments, 0 is returned." | |
972 | */ | |
0f2d19dd | 973 | SCM |
6e8d25a6 | 974 | scm_gcd (SCM x, SCM y) |
0f2d19dd | 975 | { |
ca46fb90 | 976 | if (SCM_UNBNDP (y)) |
0aacf84e | 977 | return SCM_UNBNDP (x) ? SCM_INUM0 : x; |
ca46fb90 RB |
978 | |
979 | if (SCM_INUMP (x)) | |
980 | { | |
981 | if (SCM_INUMP (y)) | |
982 | { | |
983 | long xx = SCM_INUM (x); | |
984 | long yy = SCM_INUM (y); | |
985 | long u = xx < 0 ? -xx : xx; | |
986 | long v = yy < 0 ? -yy : yy; | |
987 | long result; | |
0aacf84e MD |
988 | if (xx == 0) |
989 | result = v; | |
990 | else if (yy == 0) | |
991 | result = u; | |
992 | else | |
993 | { | |
994 | long k = 1; | |
995 | long t; | |
996 | /* Determine a common factor 2^k */ | |
997 | while (!(1 & (u | v))) | |
998 | { | |
999 | k <<= 1; | |
1000 | u >>= 1; | |
1001 | v >>= 1; | |
1002 | } | |
1003 | /* Now, any factor 2^n can be eliminated */ | |
1004 | if (u & 1) | |
1005 | t = -v; | |
1006 | else | |
1007 | { | |
1008 | t = u; | |
1009 | b3: | |
1010 | t = SCM_SRS (t, 1); | |
1011 | } | |
1012 | if (!(1 & t)) | |
1013 | goto b3; | |
1014 | if (t > 0) | |
1015 | u = t; | |
1016 | else | |
1017 | v = -t; | |
1018 | t = u - v; | |
1019 | if (t != 0) | |
1020 | goto b3; | |
1021 | result = u * k; | |
1022 | } | |
1023 | return (SCM_POSFIXABLE (result) | |
d956fa6f | 1024 | ? SCM_I_MAKINUM (result) |
0aacf84e | 1025 | : scm_i_long2big (result)); |
ca46fb90 RB |
1026 | } |
1027 | else if (SCM_BIGP (y)) | |
1028 | { | |
0bff4dce KR |
1029 | SCM_SWAP (x, y); |
1030 | goto big_inum; | |
ca46fb90 RB |
1031 | } |
1032 | else | |
1033 | SCM_WTA_DISPATCH_2 (g_gcd, x, y, SCM_ARG2, s_gcd); | |
f872b822 | 1034 | } |
ca46fb90 RB |
1035 | else if (SCM_BIGP (x)) |
1036 | { | |
1037 | if (SCM_INUMP (y)) | |
1038 | { | |
1039 | unsigned long result; | |
0bff4dce KR |
1040 | long yy; |
1041 | big_inum: | |
1042 | yy = SCM_INUM (y); | |
8c5b0afc KR |
1043 | if (yy == 0) |
1044 | return scm_abs (x); | |
0aacf84e MD |
1045 | if (yy < 0) |
1046 | yy = -yy; | |
ca46fb90 RB |
1047 | result = mpz_gcd_ui (NULL, SCM_I_BIG_MPZ (x), yy); |
1048 | scm_remember_upto_here_1 (x); | |
0aacf84e | 1049 | return (SCM_POSFIXABLE (result) |
d956fa6f | 1050 | ? SCM_I_MAKINUM (result) |
0aacf84e | 1051 | : scm_ulong2num (result)); |
ca46fb90 RB |
1052 | } |
1053 | else if (SCM_BIGP (y)) | |
1054 | { | |
1055 | SCM result = scm_i_mkbig (); | |
0aacf84e MD |
1056 | mpz_gcd (SCM_I_BIG_MPZ (result), |
1057 | SCM_I_BIG_MPZ (x), | |
1058 | SCM_I_BIG_MPZ (y)); | |
1059 | scm_remember_upto_here_2 (x, y); | |
ca46fb90 RB |
1060 | return scm_i_normbig (result); |
1061 | } | |
1062 | else | |
1063 | SCM_WTA_DISPATCH_2 (g_gcd, x, y, SCM_ARG2, s_gcd); | |
09fb7599 | 1064 | } |
ca46fb90 | 1065 | else |
09fb7599 | 1066 | SCM_WTA_DISPATCH_2 (g_gcd, x, y, SCM_ARG1, s_gcd); |
0f2d19dd JB |
1067 | } |
1068 | ||
9de33deb | 1069 | SCM_GPROC1 (s_lcm, "lcm", scm_tc7_asubr, scm_lcm, g_lcm); |
942e5b91 MG |
1070 | /* "Return the least common multiple of the arguments.\n" |
1071 | * "If called without arguments, 1 is returned." | |
1072 | */ | |
0f2d19dd | 1073 | SCM |
6e8d25a6 | 1074 | scm_lcm (SCM n1, SCM n2) |
0f2d19dd | 1075 | { |
ca46fb90 RB |
1076 | if (SCM_UNBNDP (n2)) |
1077 | { | |
1078 | if (SCM_UNBNDP (n1)) | |
d956fa6f MV |
1079 | return SCM_I_MAKINUM (1L); |
1080 | n2 = SCM_I_MAKINUM (1L); | |
09fb7599 | 1081 | } |
09fb7599 | 1082 | |
09fb7599 | 1083 | SCM_GASSERT2 (SCM_INUMP (n1) || SCM_BIGP (n1), |
ca46fb90 | 1084 | g_lcm, n1, n2, SCM_ARG1, s_lcm); |
09fb7599 | 1085 | SCM_GASSERT2 (SCM_INUMP (n2) || SCM_BIGP (n2), |
ca46fb90 | 1086 | g_lcm, n1, n2, SCM_ARGn, s_lcm); |
09fb7599 | 1087 | |
ca46fb90 RB |
1088 | if (SCM_INUMP (n1)) |
1089 | { | |
1090 | if (SCM_INUMP (n2)) | |
1091 | { | |
1092 | SCM d = scm_gcd (n1, n2); | |
1093 | if (SCM_EQ_P (d, SCM_INUM0)) | |
1094 | return d; | |
1095 | else | |
1096 | return scm_abs (scm_product (n1, scm_quotient (n2, d))); | |
1097 | } | |
1098 | else | |
1099 | { | |
1100 | /* inum n1, big n2 */ | |
1101 | inumbig: | |
1102 | { | |
1103 | SCM result = scm_i_mkbig (); | |
1104 | long nn1 = SCM_INUM (n1); | |
1105 | if (nn1 == 0) return SCM_INUM0; | |
1106 | if (nn1 < 0) nn1 = - nn1; | |
1107 | mpz_lcm_ui (SCM_I_BIG_MPZ (result), SCM_I_BIG_MPZ (n2), nn1); | |
1108 | scm_remember_upto_here_1 (n2); | |
1109 | return result; | |
1110 | } | |
1111 | } | |
1112 | } | |
1113 | else | |
1114 | { | |
1115 | /* big n1 */ | |
1116 | if (SCM_INUMP (n2)) | |
1117 | { | |
1118 | SCM_SWAP (n1, n2); | |
1119 | goto inumbig; | |
1120 | } | |
1121 | else | |
1122 | { | |
1123 | SCM result = scm_i_mkbig (); | |
1124 | mpz_lcm(SCM_I_BIG_MPZ (result), | |
1125 | SCM_I_BIG_MPZ (n1), | |
1126 | SCM_I_BIG_MPZ (n2)); | |
1127 | scm_remember_upto_here_2(n1, n2); | |
1128 | /* shouldn't need to normalize b/c lcm of 2 bigs should be big */ | |
1129 | return result; | |
1130 | } | |
f872b822 | 1131 | } |
0f2d19dd JB |
1132 | } |
1133 | ||
0f2d19dd | 1134 | #ifndef scm_long2num |
c1bfcf60 GB |
1135 | #define SCM_LOGOP_RETURN(x) scm_ulong2num(x) |
1136 | #else | |
d956fa6f | 1137 | #define SCM_LOGOP_RETURN(x) SCM_I_MAKINUM(x) |
c1bfcf60 GB |
1138 | #endif |
1139 | ||
8a525303 GB |
1140 | /* Emulating 2's complement bignums with sign magnitude arithmetic: |
1141 | ||
1142 | Logand: | |
1143 | X Y Result Method: | |
1144 | (len) | |
1145 | + + + x (map digit:logand X Y) | |
1146 | + - + x (map digit:logand X (lognot (+ -1 Y))) | |
1147 | - + + y (map digit:logand (lognot (+ -1 X)) Y) | |
1148 | - - - (+ 1 (map digit:logior (+ -1 X) (+ -1 Y))) | |
1149 | ||
1150 | Logior: | |
1151 | X Y Result Method: | |
1152 | ||
1153 | + + + (map digit:logior X Y) | |
1154 | + - - y (+ 1 (map digit:logand (lognot X) (+ -1 Y))) | |
1155 | - + - x (+ 1 (map digit:logand (+ -1 X) (lognot Y))) | |
1156 | - - - x (+ 1 (map digit:logand (+ -1 X) (+ -1 Y))) | |
1157 | ||
1158 | Logxor: | |
1159 | X Y Result Method: | |
1160 | ||
1161 | + + + (map digit:logxor X Y) | |
1162 | + - - (+ 1 (map digit:logxor X (+ -1 Y))) | |
1163 | - + - (+ 1 (map digit:logxor (+ -1 X) Y)) | |
1164 | - - + (map digit:logxor (+ -1 X) (+ -1 Y)) | |
1165 | ||
1166 | Logtest: | |
1167 | X Y Result | |
1168 | ||
1169 | + + (any digit:logand X Y) | |
1170 | + - (any digit:logand X (lognot (+ -1 Y))) | |
1171 | - + (any digit:logand (lognot (+ -1 X)) Y) | |
1172 | - - #t | |
1173 | ||
1174 | */ | |
1175 | ||
c3ee7520 | 1176 | SCM_DEFINE1 (scm_logand, "logand", scm_tc7_asubr, |
1bbd0b84 | 1177 | (SCM n1, SCM n2), |
3c3db128 GH |
1178 | "Return the bitwise AND of the integer arguments.\n\n" |
1179 | "@lisp\n" | |
1180 | "(logand) @result{} -1\n" | |
1181 | "(logand 7) @result{} 7\n" | |
535f2a51 | 1182 | "(logand #b111 #b011 #b001) @result{} 1\n" |
3c3db128 | 1183 | "@end lisp") |
1bbd0b84 | 1184 | #define FUNC_NAME s_scm_logand |
0f2d19dd | 1185 | { |
9a00c9fc DH |
1186 | long int nn1; |
1187 | ||
0aacf84e MD |
1188 | if (SCM_UNBNDP (n2)) |
1189 | { | |
1190 | if (SCM_UNBNDP (n1)) | |
d956fa6f | 1191 | return SCM_I_MAKINUM (-1); |
0aacf84e MD |
1192 | else if (!SCM_NUMBERP (n1)) |
1193 | SCM_WRONG_TYPE_ARG (SCM_ARG1, n1); | |
1194 | else if (SCM_NUMBERP (n1)) | |
1195 | return n1; | |
1196 | else | |
1197 | SCM_WRONG_TYPE_ARG (SCM_ARG1, n1); | |
d28da049 | 1198 | } |
09fb7599 | 1199 | |
0aacf84e MD |
1200 | if (SCM_INUMP (n1)) |
1201 | { | |
9a00c9fc | 1202 | nn1 = SCM_INUM (n1); |
0aacf84e MD |
1203 | if (SCM_INUMP (n2)) |
1204 | { | |
1205 | long nn2 = SCM_INUM (n2); | |
d956fa6f | 1206 | return SCM_I_MAKINUM (nn1 & nn2); |
0aacf84e MD |
1207 | } |
1208 | else if SCM_BIGP (n2) | |
1209 | { | |
1210 | intbig: | |
1211 | if (n1 == 0) | |
1212 | return SCM_INUM0; | |
1213 | { | |
1214 | SCM result_z = scm_i_mkbig (); | |
1215 | mpz_t nn1_z; | |
1216 | mpz_init_set_si (nn1_z, nn1); | |
1217 | mpz_and (SCM_I_BIG_MPZ (result_z), nn1_z, SCM_I_BIG_MPZ (n2)); | |
1218 | scm_remember_upto_here_1 (n2); | |
1219 | mpz_clear (nn1_z); | |
1220 | return scm_i_normbig (result_z); | |
1221 | } | |
1222 | } | |
1223 | else | |
1224 | SCM_WRONG_TYPE_ARG (SCM_ARG2, n2); | |
1225 | } | |
1226 | else if (SCM_BIGP (n1)) | |
1227 | { | |
1228 | if (SCM_INUMP (n2)) | |
1229 | { | |
1230 | SCM_SWAP (n1, n2); | |
1231 | nn1 = SCM_INUM (n1); | |
1232 | goto intbig; | |
1233 | } | |
1234 | else if (SCM_BIGP (n2)) | |
1235 | { | |
1236 | SCM result_z = scm_i_mkbig (); | |
1237 | mpz_and (SCM_I_BIG_MPZ (result_z), | |
1238 | SCM_I_BIG_MPZ (n1), | |
1239 | SCM_I_BIG_MPZ (n2)); | |
1240 | scm_remember_upto_here_2 (n1, n2); | |
1241 | return scm_i_normbig (result_z); | |
1242 | } | |
1243 | else | |
1244 | SCM_WRONG_TYPE_ARG (SCM_ARG2, n2); | |
09fb7599 | 1245 | } |
0aacf84e | 1246 | else |
09fb7599 | 1247 | SCM_WRONG_TYPE_ARG (SCM_ARG1, n1); |
0f2d19dd | 1248 | } |
1bbd0b84 | 1249 | #undef FUNC_NAME |
0f2d19dd | 1250 | |
09fb7599 | 1251 | |
c3ee7520 | 1252 | SCM_DEFINE1 (scm_logior, "logior", scm_tc7_asubr, |
1bbd0b84 | 1253 | (SCM n1, SCM n2), |
3c3db128 GH |
1254 | "Return the bitwise OR of the integer arguments.\n\n" |
1255 | "@lisp\n" | |
1256 | "(logior) @result{} 0\n" | |
1257 | "(logior 7) @result{} 7\n" | |
1258 | "(logior #b000 #b001 #b011) @result{} 3\n" | |
1e6808ea | 1259 | "@end lisp") |
1bbd0b84 | 1260 | #define FUNC_NAME s_scm_logior |
0f2d19dd | 1261 | { |
9a00c9fc DH |
1262 | long int nn1; |
1263 | ||
0aacf84e MD |
1264 | if (SCM_UNBNDP (n2)) |
1265 | { | |
1266 | if (SCM_UNBNDP (n1)) | |
1267 | return SCM_INUM0; | |
1268 | else if (SCM_NUMBERP (n1)) | |
1269 | return n1; | |
1270 | else | |
1271 | SCM_WRONG_TYPE_ARG (SCM_ARG1, n1); | |
d28da049 | 1272 | } |
09fb7599 | 1273 | |
0aacf84e MD |
1274 | if (SCM_INUMP (n1)) |
1275 | { | |
9a00c9fc | 1276 | nn1 = SCM_INUM (n1); |
0aacf84e MD |
1277 | if (SCM_INUMP (n2)) |
1278 | { | |
1279 | long nn2 = SCM_INUM (n2); | |
d956fa6f | 1280 | return SCM_I_MAKINUM (nn1 | nn2); |
0aacf84e MD |
1281 | } |
1282 | else if (SCM_BIGP (n2)) | |
1283 | { | |
1284 | intbig: | |
1285 | if (nn1 == 0) | |
1286 | return n2; | |
1287 | { | |
1288 | SCM result_z = scm_i_mkbig (); | |
1289 | mpz_t nn1_z; | |
1290 | mpz_init_set_si (nn1_z, nn1); | |
1291 | mpz_ior (SCM_I_BIG_MPZ (result_z), nn1_z, SCM_I_BIG_MPZ (n2)); | |
1292 | scm_remember_upto_here_1 (n2); | |
1293 | mpz_clear (nn1_z); | |
1294 | return result_z; | |
1295 | } | |
1296 | } | |
1297 | else | |
1298 | SCM_WRONG_TYPE_ARG (SCM_ARG2, n2); | |
1299 | } | |
1300 | else if (SCM_BIGP (n1)) | |
1301 | { | |
1302 | if (SCM_INUMP (n2)) | |
1303 | { | |
1304 | SCM_SWAP (n1, n2); | |
1305 | nn1 = SCM_INUM (n1); | |
1306 | goto intbig; | |
1307 | } | |
1308 | else if (SCM_BIGP (n2)) | |
1309 | { | |
1310 | SCM result_z = scm_i_mkbig (); | |
1311 | mpz_ior (SCM_I_BIG_MPZ (result_z), | |
1312 | SCM_I_BIG_MPZ (n1), | |
1313 | SCM_I_BIG_MPZ (n2)); | |
1314 | scm_remember_upto_here_2 (n1, n2); | |
1315 | return result_z; | |
1316 | } | |
1317 | else | |
1318 | SCM_WRONG_TYPE_ARG (SCM_ARG2, n2); | |
09fb7599 | 1319 | } |
0aacf84e | 1320 | else |
09fb7599 | 1321 | SCM_WRONG_TYPE_ARG (SCM_ARG1, n1); |
0f2d19dd | 1322 | } |
1bbd0b84 | 1323 | #undef FUNC_NAME |
0f2d19dd | 1324 | |
09fb7599 | 1325 | |
c3ee7520 | 1326 | SCM_DEFINE1 (scm_logxor, "logxor", scm_tc7_asubr, |
1bbd0b84 | 1327 | (SCM n1, SCM n2), |
3c3db128 GH |
1328 | "Return the bitwise XOR of the integer arguments. A bit is\n" |
1329 | "set in the result if it is set in an odd number of arguments.\n" | |
1330 | "@lisp\n" | |
1331 | "(logxor) @result{} 0\n" | |
1332 | "(logxor 7) @result{} 7\n" | |
1333 | "(logxor #b000 #b001 #b011) @result{} 2\n" | |
1334 | "(logxor #b000 #b001 #b011 #b011) @result{} 1\n" | |
1e6808ea | 1335 | "@end lisp") |
1bbd0b84 | 1336 | #define FUNC_NAME s_scm_logxor |
0f2d19dd | 1337 | { |
9a00c9fc DH |
1338 | long int nn1; |
1339 | ||
0aacf84e MD |
1340 | if (SCM_UNBNDP (n2)) |
1341 | { | |
1342 | if (SCM_UNBNDP (n1)) | |
1343 | return SCM_INUM0; | |
1344 | else if (SCM_NUMBERP (n1)) | |
1345 | return n1; | |
1346 | else | |
1347 | SCM_WRONG_TYPE_ARG (SCM_ARG1, n1); | |
d28da049 | 1348 | } |
09fb7599 | 1349 | |
0aacf84e MD |
1350 | if (SCM_INUMP (n1)) |
1351 | { | |
9a00c9fc | 1352 | nn1 = SCM_INUM (n1); |
0aacf84e MD |
1353 | if (SCM_INUMP (n2)) |
1354 | { | |
1355 | long nn2 = SCM_INUM (n2); | |
d956fa6f | 1356 | return SCM_I_MAKINUM (nn1 ^ nn2); |
0aacf84e MD |
1357 | } |
1358 | else if (SCM_BIGP (n2)) | |
1359 | { | |
1360 | intbig: | |
1361 | { | |
1362 | SCM result_z = scm_i_mkbig (); | |
1363 | mpz_t nn1_z; | |
1364 | mpz_init_set_si (nn1_z, nn1); | |
1365 | mpz_xor (SCM_I_BIG_MPZ (result_z), nn1_z, SCM_I_BIG_MPZ (n2)); | |
1366 | scm_remember_upto_here_1 (n2); | |
1367 | mpz_clear (nn1_z); | |
1368 | return scm_i_normbig (result_z); | |
1369 | } | |
1370 | } | |
1371 | else | |
1372 | SCM_WRONG_TYPE_ARG (SCM_ARG2, n2); | |
1373 | } | |
1374 | else if (SCM_BIGP (n1)) | |
1375 | { | |
1376 | if (SCM_INUMP (n2)) | |
1377 | { | |
1378 | SCM_SWAP (n1, n2); | |
1379 | nn1 = SCM_INUM (n1); | |
1380 | goto intbig; | |
1381 | } | |
1382 | else if (SCM_BIGP (n2)) | |
1383 | { | |
1384 | SCM result_z = scm_i_mkbig (); | |
1385 | mpz_xor (SCM_I_BIG_MPZ (result_z), | |
1386 | SCM_I_BIG_MPZ (n1), | |
1387 | SCM_I_BIG_MPZ (n2)); | |
1388 | scm_remember_upto_here_2 (n1, n2); | |
1389 | return scm_i_normbig (result_z); | |
1390 | } | |
1391 | else | |
1392 | SCM_WRONG_TYPE_ARG (SCM_ARG2, n2); | |
09fb7599 | 1393 | } |
0aacf84e | 1394 | else |
09fb7599 | 1395 | SCM_WRONG_TYPE_ARG (SCM_ARG1, n1); |
0f2d19dd | 1396 | } |
1bbd0b84 | 1397 | #undef FUNC_NAME |
0f2d19dd | 1398 | |
09fb7599 | 1399 | |
a1ec6916 | 1400 | SCM_DEFINE (scm_logtest, "logtest", 2, 0, 0, |
1e6808ea MG |
1401 | (SCM j, SCM k), |
1402 | "@lisp\n" | |
b380b885 MD |
1403 | "(logtest j k) @equiv{} (not (zero? (logand j k)))\n\n" |
1404 | "(logtest #b0100 #b1011) @result{} #f\n" | |
1405 | "(logtest #b0100 #b0111) @result{} #t\n" | |
1e6808ea | 1406 | "@end lisp") |
1bbd0b84 | 1407 | #define FUNC_NAME s_scm_logtest |
0f2d19dd | 1408 | { |
1e6808ea | 1409 | long int nj; |
9a00c9fc | 1410 | |
0aacf84e MD |
1411 | if (SCM_INUMP (j)) |
1412 | { | |
1e6808ea | 1413 | nj = SCM_INUM (j); |
0aacf84e MD |
1414 | if (SCM_INUMP (k)) |
1415 | { | |
1416 | long nk = SCM_INUM (k); | |
73e4de09 | 1417 | return scm_from_bool (nj & nk); |
0aacf84e MD |
1418 | } |
1419 | else if (SCM_BIGP (k)) | |
1420 | { | |
1421 | intbig: | |
1422 | if (nj == 0) | |
1423 | return SCM_BOOL_F; | |
1424 | { | |
1425 | SCM result; | |
1426 | mpz_t nj_z; | |
1427 | mpz_init_set_si (nj_z, nj); | |
1428 | mpz_and (nj_z, nj_z, SCM_I_BIG_MPZ (k)); | |
1429 | scm_remember_upto_here_1 (k); | |
73e4de09 | 1430 | result = scm_from_bool (mpz_sgn (nj_z) != 0); |
0aacf84e MD |
1431 | mpz_clear (nj_z); |
1432 | return result; | |
1433 | } | |
1434 | } | |
1435 | else | |
1436 | SCM_WRONG_TYPE_ARG (SCM_ARG2, k); | |
1437 | } | |
1438 | else if (SCM_BIGP (j)) | |
1439 | { | |
1440 | if (SCM_INUMP (k)) | |
1441 | { | |
1442 | SCM_SWAP (j, k); | |
1443 | nj = SCM_INUM (j); | |
1444 | goto intbig; | |
1445 | } | |
1446 | else if (SCM_BIGP (k)) | |
1447 | { | |
1448 | SCM result; | |
1449 | mpz_t result_z; | |
1450 | mpz_init (result_z); | |
1451 | mpz_and (result_z, | |
1452 | SCM_I_BIG_MPZ (j), | |
1453 | SCM_I_BIG_MPZ (k)); | |
1454 | scm_remember_upto_here_2 (j, k); | |
73e4de09 | 1455 | result = scm_from_bool (mpz_sgn (result_z) != 0); |
0aacf84e MD |
1456 | mpz_clear (result_z); |
1457 | return result; | |
1458 | } | |
1459 | else | |
1460 | SCM_WRONG_TYPE_ARG (SCM_ARG2, k); | |
1461 | } | |
1462 | else | |
1463 | SCM_WRONG_TYPE_ARG (SCM_ARG1, j); | |
0f2d19dd | 1464 | } |
1bbd0b84 | 1465 | #undef FUNC_NAME |
0f2d19dd | 1466 | |
c1bfcf60 | 1467 | |
a1ec6916 | 1468 | SCM_DEFINE (scm_logbit_p, "logbit?", 2, 0, 0, |
2cd04b42 | 1469 | (SCM index, SCM j), |
1e6808ea | 1470 | "@lisp\n" |
b380b885 MD |
1471 | "(logbit? index j) @equiv{} (logtest (integer-expt 2 index) j)\n\n" |
1472 | "(logbit? 0 #b1101) @result{} #t\n" | |
1473 | "(logbit? 1 #b1101) @result{} #f\n" | |
1474 | "(logbit? 2 #b1101) @result{} #t\n" | |
1475 | "(logbit? 3 #b1101) @result{} #t\n" | |
1476 | "(logbit? 4 #b1101) @result{} #f\n" | |
1e6808ea | 1477 | "@end lisp") |
1bbd0b84 | 1478 | #define FUNC_NAME s_scm_logbit_p |
0f2d19dd | 1479 | { |
78166ad5 | 1480 | unsigned long int iindex; |
5efd3c7d | 1481 | iindex = scm_to_ulong (index); |
78166ad5 | 1482 | |
0aacf84e | 1483 | if (SCM_INUMP (j)) |
0d75f6d8 KR |
1484 | { |
1485 | /* bits above what's in an inum follow the sign bit */ | |
20fcc8ed | 1486 | iindex = min (iindex, SCM_LONG_BIT - 1); |
73e4de09 | 1487 | return scm_from_bool ((1L << iindex) & SCM_INUM (j)); |
0d75f6d8 | 1488 | } |
0aacf84e MD |
1489 | else if (SCM_BIGP (j)) |
1490 | { | |
1491 | int val = mpz_tstbit (SCM_I_BIG_MPZ (j), iindex); | |
1492 | scm_remember_upto_here_1 (j); | |
73e4de09 | 1493 | return scm_from_bool (val); |
0aacf84e MD |
1494 | } |
1495 | else | |
78166ad5 | 1496 | SCM_WRONG_TYPE_ARG (SCM_ARG2, j); |
0f2d19dd | 1497 | } |
1bbd0b84 | 1498 | #undef FUNC_NAME |
0f2d19dd | 1499 | |
78166ad5 | 1500 | |
a1ec6916 | 1501 | SCM_DEFINE (scm_lognot, "lognot", 1, 0, 0, |
1bbd0b84 | 1502 | (SCM n), |
4d814788 | 1503 | "Return the integer which is the ones-complement of the integer\n" |
1e6808ea MG |
1504 | "argument.\n" |
1505 | "\n" | |
b380b885 MD |
1506 | "@lisp\n" |
1507 | "(number->string (lognot #b10000000) 2)\n" | |
1508 | " @result{} \"-10000001\"\n" | |
1509 | "(number->string (lognot #b0) 2)\n" | |
1510 | " @result{} \"-1\"\n" | |
1e6808ea | 1511 | "@end lisp") |
1bbd0b84 | 1512 | #define FUNC_NAME s_scm_lognot |
0f2d19dd | 1513 | { |
f9811f9f KR |
1514 | if (SCM_INUMP (n)) { |
1515 | /* No overflow here, just need to toggle all the bits making up the inum. | |
1516 | Enhancement: No need to strip the tag and add it back, could just xor | |
1517 | a block of 1 bits, if that worked with the various debug versions of | |
1518 | the SCM typedef. */ | |
d956fa6f | 1519 | return SCM_I_MAKINUM (~ SCM_INUM (n)); |
f9811f9f KR |
1520 | |
1521 | } else if (SCM_BIGP (n)) { | |
1522 | SCM result = scm_i_mkbig (); | |
1523 | mpz_com (SCM_I_BIG_MPZ (result), SCM_I_BIG_MPZ (n)); | |
1524 | scm_remember_upto_here_1 (n); | |
1525 | return result; | |
1526 | ||
1527 | } else { | |
1528 | SCM_WRONG_TYPE_ARG (SCM_ARG1, n); | |
1529 | } | |
0f2d19dd | 1530 | } |
1bbd0b84 | 1531 | #undef FUNC_NAME |
0f2d19dd | 1532 | |
518b7508 KR |
1533 | /* returns 0 if IN is not an integer. OUT must already be |
1534 | initialized. */ | |
1535 | static int | |
1536 | coerce_to_big (SCM in, mpz_t out) | |
1537 | { | |
1538 | if (SCM_BIGP (in)) | |
1539 | mpz_set (out, SCM_I_BIG_MPZ (in)); | |
1540 | else if (SCM_INUMP (in)) | |
1541 | mpz_set_si (out, SCM_INUM (in)); | |
1542 | else | |
1543 | return 0; | |
1544 | ||
1545 | return 1; | |
1546 | } | |
1547 | ||
d885e204 | 1548 | SCM_DEFINE (scm_modulo_expt, "modulo-expt", 3, 0, 0, |
518b7508 KR |
1549 | (SCM n, SCM k, SCM m), |
1550 | "Return @var{n} raised to the integer exponent\n" | |
1551 | "@var{k}, modulo @var{m}.\n" | |
1552 | "\n" | |
1553 | "@lisp\n" | |
1554 | "(modulo-expt 2 3 5)\n" | |
1555 | " @result{} 3\n" | |
1556 | "@end lisp") | |
d885e204 | 1557 | #define FUNC_NAME s_scm_modulo_expt |
518b7508 KR |
1558 | { |
1559 | mpz_t n_tmp; | |
1560 | mpz_t k_tmp; | |
1561 | mpz_t m_tmp; | |
1562 | ||
1563 | /* There are two classes of error we might encounter -- | |
1564 | 1) Math errors, which we'll report by calling scm_num_overflow, | |
1565 | and | |
1566 | 2) wrong-type errors, which of course we'll report by calling | |
1567 | SCM_WRONG_TYPE_ARG. | |
1568 | We don't report those errors immediately, however; instead we do | |
1569 | some cleanup first. These variables tell us which error (if | |
1570 | any) we should report after cleaning up. | |
1571 | */ | |
1572 | int report_overflow = 0; | |
1573 | ||
1574 | int position_of_wrong_type = 0; | |
1575 | SCM value_of_wrong_type = SCM_INUM0; | |
1576 | ||
1577 | SCM result = SCM_UNDEFINED; | |
1578 | ||
1579 | mpz_init (n_tmp); | |
1580 | mpz_init (k_tmp); | |
1581 | mpz_init (m_tmp); | |
1582 | ||
1583 | if (SCM_EQ_P (m, SCM_INUM0)) | |
1584 | { | |
1585 | report_overflow = 1; | |
1586 | goto cleanup; | |
1587 | } | |
1588 | ||
1589 | if (!coerce_to_big (n, n_tmp)) | |
1590 | { | |
1591 | value_of_wrong_type = n; | |
1592 | position_of_wrong_type = 1; | |
1593 | goto cleanup; | |
1594 | } | |
1595 | ||
1596 | if (!coerce_to_big (k, k_tmp)) | |
1597 | { | |
1598 | value_of_wrong_type = k; | |
1599 | position_of_wrong_type = 2; | |
1600 | goto cleanup; | |
1601 | } | |
1602 | ||
1603 | if (!coerce_to_big (m, m_tmp)) | |
1604 | { | |
1605 | value_of_wrong_type = m; | |
1606 | position_of_wrong_type = 3; | |
1607 | goto cleanup; | |
1608 | } | |
1609 | ||
1610 | /* if the exponent K is negative, and we simply call mpz_powm, we | |
1611 | will get a divide-by-zero exception when an inverse 1/n mod m | |
1612 | doesn't exist (or is not unique). Since exceptions are hard to | |
1613 | handle, we'll attempt the inversion "by hand" -- that way, we get | |
1614 | a simple failure code, which is easy to handle. */ | |
1615 | ||
1616 | if (-1 == mpz_sgn (k_tmp)) | |
1617 | { | |
1618 | if (!mpz_invert (n_tmp, n_tmp, m_tmp)) | |
1619 | { | |
1620 | report_overflow = 1; | |
1621 | goto cleanup; | |
1622 | } | |
1623 | mpz_neg (k_tmp, k_tmp); | |
1624 | } | |
1625 | ||
1626 | result = scm_i_mkbig (); | |
1627 | mpz_powm (SCM_I_BIG_MPZ (result), | |
1628 | n_tmp, | |
1629 | k_tmp, | |
1630 | m_tmp); | |
b7b8c575 KR |
1631 | |
1632 | if (mpz_sgn (m_tmp) < 0 && mpz_sgn (SCM_I_BIG_MPZ (result)) != 0) | |
1633 | mpz_add (SCM_I_BIG_MPZ (result), SCM_I_BIG_MPZ (result), m_tmp); | |
1634 | ||
518b7508 KR |
1635 | cleanup: |
1636 | mpz_clear (m_tmp); | |
1637 | mpz_clear (k_tmp); | |
1638 | mpz_clear (n_tmp); | |
1639 | ||
1640 | if (report_overflow) | |
1641 | scm_num_overflow (FUNC_NAME); | |
1642 | ||
1643 | if (position_of_wrong_type) | |
1644 | SCM_WRONG_TYPE_ARG (position_of_wrong_type, | |
1645 | value_of_wrong_type); | |
1646 | ||
1647 | return scm_i_normbig (result); | |
1648 | } | |
1649 | #undef FUNC_NAME | |
1650 | ||
a1ec6916 | 1651 | SCM_DEFINE (scm_integer_expt, "integer-expt", 2, 0, 0, |
2cd04b42 | 1652 | (SCM n, SCM k), |
1e6808ea MG |
1653 | "Return @var{n} raised to the non-negative integer exponent\n" |
1654 | "@var{k}.\n" | |
1655 | "\n" | |
b380b885 MD |
1656 | "@lisp\n" |
1657 | "(integer-expt 2 5)\n" | |
1658 | " @result{} 32\n" | |
1659 | "(integer-expt -3 3)\n" | |
1660 | " @result{} -27\n" | |
1661 | "@end lisp") | |
1bbd0b84 | 1662 | #define FUNC_NAME s_scm_integer_expt |
0f2d19dd | 1663 | { |
1c35cb19 RB |
1664 | long i2 = 0; |
1665 | SCM z_i2 = SCM_BOOL_F; | |
1666 | int i2_is_big = 0; | |
d956fa6f | 1667 | SCM acc = SCM_I_MAKINUM (1L); |
ca46fb90 | 1668 | |
d57ed702 | 1669 | /* 0^0 == 1 according to R5RS */ |
4260a7fc | 1670 | if (SCM_EQ_P (n, SCM_INUM0) || SCM_EQ_P (n, acc)) |
73e4de09 | 1671 | return scm_is_false (scm_zero_p(k)) ? n : acc; |
d956fa6f | 1672 | else if (SCM_EQ_P (n, SCM_I_MAKINUM (-1L))) |
73e4de09 | 1673 | return scm_is_false (scm_even_p (k)) ? n : acc; |
ca46fb90 | 1674 | |
ca46fb90 RB |
1675 | if (SCM_INUMP (k)) |
1676 | i2 = SCM_INUM (k); | |
1677 | else if (SCM_BIGP (k)) | |
1678 | { | |
1679 | z_i2 = scm_i_clonebig (k, 1); | |
ca46fb90 RB |
1680 | scm_remember_upto_here_1 (k); |
1681 | i2_is_big = 1; | |
1682 | } | |
1683 | else if (SCM_REALP (k)) | |
2830fd91 MD |
1684 | { |
1685 | double r = SCM_REAL_VALUE (k); | |
ca46fb90 RB |
1686 | if (floor (r) != r) |
1687 | SCM_WRONG_TYPE_ARG (2, k); | |
1688 | if ((r > SCM_MOST_POSITIVE_FIXNUM) || (r < SCM_MOST_NEGATIVE_FIXNUM)) | |
1689 | { | |
1690 | z_i2 = scm_i_mkbig (); | |
753ac1e7 | 1691 | mpz_set_d (SCM_I_BIG_MPZ (z_i2), r); |
ca46fb90 RB |
1692 | i2_is_big = 1; |
1693 | } | |
1694 | else | |
1695 | { | |
1696 | i2 = r; | |
1697 | } | |
2830fd91 MD |
1698 | } |
1699 | else | |
ca46fb90 RB |
1700 | SCM_WRONG_TYPE_ARG (2, k); |
1701 | ||
1702 | if (i2_is_big) | |
f872b822 | 1703 | { |
ca46fb90 RB |
1704 | if (mpz_sgn(SCM_I_BIG_MPZ (z_i2)) == -1) |
1705 | { | |
1706 | mpz_neg (SCM_I_BIG_MPZ (z_i2), SCM_I_BIG_MPZ (z_i2)); | |
1707 | n = scm_divide (n, SCM_UNDEFINED); | |
1708 | } | |
1709 | while (1) | |
1710 | { | |
1711 | if (mpz_sgn(SCM_I_BIG_MPZ (z_i2)) == 0) | |
1712 | { | |
ca46fb90 RB |
1713 | return acc; |
1714 | } | |
1715 | if (mpz_cmp_ui(SCM_I_BIG_MPZ (z_i2), 1) == 0) | |
1716 | { | |
ca46fb90 RB |
1717 | return scm_product (acc, n); |
1718 | } | |
1719 | if (mpz_tstbit(SCM_I_BIG_MPZ (z_i2), 0)) | |
1720 | acc = scm_product (acc, n); | |
1721 | n = scm_product (n, n); | |
1722 | mpz_fdiv_q_2exp (SCM_I_BIG_MPZ (z_i2), SCM_I_BIG_MPZ (z_i2), 1); | |
1723 | } | |
f872b822 | 1724 | } |
ca46fb90 | 1725 | else |
f872b822 | 1726 | { |
ca46fb90 RB |
1727 | if (i2 < 0) |
1728 | { | |
1729 | i2 = -i2; | |
1730 | n = scm_divide (n, SCM_UNDEFINED); | |
1731 | } | |
1732 | while (1) | |
1733 | { | |
1734 | if (0 == i2) | |
1735 | return acc; | |
1736 | if (1 == i2) | |
1737 | return scm_product (acc, n); | |
1738 | if (i2 & 1) | |
1739 | acc = scm_product (acc, n); | |
1740 | n = scm_product (n, n); | |
1741 | i2 >>= 1; | |
1742 | } | |
f872b822 | 1743 | } |
0f2d19dd | 1744 | } |
1bbd0b84 | 1745 | #undef FUNC_NAME |
0f2d19dd | 1746 | |
a1ec6916 | 1747 | SCM_DEFINE (scm_ash, "ash", 2, 0, 0, |
1bbd0b84 | 1748 | (SCM n, SCM cnt), |
32f19569 KR |
1749 | "Return @var{n} shifted left by @var{cnt} bits, or shifted right\n" |
1750 | "if @var{cnt} is negative. This is an ``arithmetic'' shift.\n" | |
1e6808ea | 1751 | "\n" |
e7644cb2 | 1752 | "This is effectively a multiplication by 2^@var{cnt}, and when\n" |
32f19569 KR |
1753 | "@var{cnt} is negative it's a division, rounded towards negative\n" |
1754 | "infinity. (Note that this is not the same rounding as\n" | |
1755 | "@code{quotient} does.)\n" | |
1756 | "\n" | |
1757 | "With @var{n} viewed as an infinite precision twos complement,\n" | |
1758 | "@code{ash} means a left shift introducing zero bits, or a right\n" | |
1759 | "shift dropping bits.\n" | |
1e6808ea | 1760 | "\n" |
b380b885 | 1761 | "@lisp\n" |
1e6808ea MG |
1762 | "(number->string (ash #b1 3) 2) @result{} \"1000\"\n" |
1763 | "(number->string (ash #b1010 -1) 2) @result{} \"101\"\n" | |
32f19569 KR |
1764 | "\n" |
1765 | ";; -23 is bits ...11101001, -6 is bits ...111010\n" | |
1766 | "(ash -23 -2) @result{} -6\n" | |
a3c8b9fc | 1767 | "@end lisp") |
1bbd0b84 | 1768 | #define FUNC_NAME s_scm_ash |
0f2d19dd | 1769 | { |
3ab9f56e | 1770 | long bits_to_shift; |
5efd3c7d | 1771 | bits_to_shift = scm_to_long (cnt); |
ca46fb90 RB |
1772 | |
1773 | if (bits_to_shift < 0) | |
1774 | { | |
1775 | /* Shift right by abs(cnt) bits. This is realized as a division | |
1776 | by div:=2^abs(cnt). However, to guarantee the floor | |
1777 | rounding, negative values require some special treatment. | |
1778 | */ | |
d956fa6f | 1779 | SCM div = scm_integer_expt (SCM_I_MAKINUM (2), |
5efd3c7d | 1780 | scm_from_long (-bits_to_shift)); |
f92e85f7 MV |
1781 | |
1782 | /* scm_quotient assumes its arguments are integers, but it's legal to (ash 1/2 -1) */ | |
73e4de09 | 1783 | if (scm_is_false (scm_negative_p (n))) |
ca46fb90 RB |
1784 | return scm_quotient (n, div); |
1785 | else | |
d956fa6f MV |
1786 | return scm_sum (SCM_I_MAKINUM (-1L), |
1787 | scm_quotient (scm_sum (SCM_I_MAKINUM (1L), n), div)); | |
ca46fb90 RB |
1788 | } |
1789 | else | |
3ab9f56e | 1790 | /* Shift left is done by multiplication with 2^CNT */ |
d956fa6f | 1791 | return scm_product (n, scm_integer_expt (SCM_I_MAKINUM (2), cnt)); |
0f2d19dd | 1792 | } |
1bbd0b84 | 1793 | #undef FUNC_NAME |
0f2d19dd | 1794 | |
3c9f20f8 | 1795 | |
a1ec6916 | 1796 | SCM_DEFINE (scm_bit_extract, "bit-extract", 3, 0, 0, |
1bbd0b84 | 1797 | (SCM n, SCM start, SCM end), |
1e6808ea MG |
1798 | "Return the integer composed of the @var{start} (inclusive)\n" |
1799 | "through @var{end} (exclusive) bits of @var{n}. The\n" | |
1800 | "@var{start}th bit becomes the 0-th bit in the result.\n" | |
1801 | "\n" | |
b380b885 MD |
1802 | "@lisp\n" |
1803 | "(number->string (bit-extract #b1101101010 0 4) 2)\n" | |
1804 | " @result{} \"1010\"\n" | |
1805 | "(number->string (bit-extract #b1101101010 4 9) 2)\n" | |
1806 | " @result{} \"10110\"\n" | |
1807 | "@end lisp") | |
1bbd0b84 | 1808 | #define FUNC_NAME s_scm_bit_extract |
0f2d19dd | 1809 | { |
7f848242 | 1810 | unsigned long int istart, iend, bits; |
5efd3c7d MV |
1811 | istart = scm_to_ulong (start); |
1812 | iend = scm_to_ulong (end); | |
c1bfcf60 | 1813 | SCM_ASSERT_RANGE (3, end, (iend >= istart)); |
78166ad5 | 1814 | |
7f848242 KR |
1815 | /* how many bits to keep */ |
1816 | bits = iend - istart; | |
1817 | ||
0aacf84e MD |
1818 | if (SCM_INUMP (n)) |
1819 | { | |
1820 | long int in = SCM_INUM (n); | |
7f848242 KR |
1821 | |
1822 | /* When istart>=SCM_I_FIXNUM_BIT we can just limit the shift to | |
d77ad560 | 1823 | SCM_I_FIXNUM_BIT-1 to get either 0 or -1 per the sign of "in". */ |
857ae6af | 1824 | in = SCM_SRS (in, min (istart, SCM_I_FIXNUM_BIT-1)); |
ac0c002c | 1825 | |
0aacf84e MD |
1826 | if (in < 0 && bits >= SCM_I_FIXNUM_BIT) |
1827 | { | |
1828 | /* Since we emulate two's complement encoded numbers, this | |
1829 | * special case requires us to produce a result that has | |
7f848242 | 1830 | * more bits than can be stored in a fixnum. |
0aacf84e | 1831 | */ |
7f848242 KR |
1832 | SCM result = scm_i_long2big (in); |
1833 | mpz_fdiv_r_2exp (SCM_I_BIG_MPZ (result), SCM_I_BIG_MPZ (result), | |
1834 | bits); | |
1835 | return result; | |
0aacf84e | 1836 | } |
ac0c002c | 1837 | |
7f848242 | 1838 | /* mask down to requisite bits */ |
857ae6af | 1839 | bits = min (bits, SCM_I_FIXNUM_BIT); |
d956fa6f | 1840 | return SCM_I_MAKINUM (in & ((1L << bits) - 1)); |
0aacf84e MD |
1841 | } |
1842 | else if (SCM_BIGP (n)) | |
ac0c002c | 1843 | { |
7f848242 KR |
1844 | SCM result; |
1845 | if (bits == 1) | |
1846 | { | |
d956fa6f | 1847 | result = SCM_I_MAKINUM (mpz_tstbit (SCM_I_BIG_MPZ (n), istart)); |
7f848242 KR |
1848 | } |
1849 | else | |
1850 | { | |
1851 | /* ENHANCE-ME: It'd be nice not to allocate a new bignum when | |
1852 | bits<SCM_I_FIXNUM_BIT. Would want some help from GMP to get | |
1853 | such bits into a ulong. */ | |
1854 | result = scm_i_mkbig (); | |
1855 | mpz_fdiv_q_2exp (SCM_I_BIG_MPZ(result), SCM_I_BIG_MPZ(n), istart); | |
1856 | mpz_fdiv_r_2exp (SCM_I_BIG_MPZ(result), SCM_I_BIG_MPZ(result), bits); | |
1857 | result = scm_i_normbig (result); | |
1858 | } | |
1859 | scm_remember_upto_here_1 (n); | |
1860 | return result; | |
ac0c002c | 1861 | } |
0aacf84e | 1862 | else |
78166ad5 | 1863 | SCM_WRONG_TYPE_ARG (SCM_ARG1, n); |
0f2d19dd | 1864 | } |
1bbd0b84 | 1865 | #undef FUNC_NAME |
0f2d19dd | 1866 | |
7f848242 | 1867 | |
e4755e5c JB |
1868 | static const char scm_logtab[] = { |
1869 | 0, 1, 1, 2, 1, 2, 2, 3, 1, 2, 2, 3, 2, 3, 3, 4 | |
1870 | }; | |
1cc91f1b | 1871 | |
a1ec6916 | 1872 | SCM_DEFINE (scm_logcount, "logcount", 1, 0, 0, |
1bbd0b84 | 1873 | (SCM n), |
1e6808ea MG |
1874 | "Return the number of bits in integer @var{n}. If integer is\n" |
1875 | "positive, the 1-bits in its binary representation are counted.\n" | |
1876 | "If negative, the 0-bits in its two's-complement binary\n" | |
1877 | "representation are counted. If 0, 0 is returned.\n" | |
1878 | "\n" | |
b380b885 MD |
1879 | "@lisp\n" |
1880 | "(logcount #b10101010)\n" | |
ca46fb90 RB |
1881 | " @result{} 4\n" |
1882 | "(logcount 0)\n" | |
1883 | " @result{} 0\n" | |
1884 | "(logcount -2)\n" | |
1885 | " @result{} 1\n" | |
1886 | "@end lisp") | |
1887 | #define FUNC_NAME s_scm_logcount | |
1888 | { | |
1889 | if (SCM_INUMP (n)) | |
f872b822 | 1890 | { |
ca46fb90 RB |
1891 | unsigned long int c = 0; |
1892 | long int nn = SCM_INUM (n); | |
1893 | if (nn < 0) | |
1894 | nn = -1 - nn; | |
1895 | while (nn) | |
1896 | { | |
1897 | c += scm_logtab[15 & nn]; | |
1898 | nn >>= 4; | |
1899 | } | |
d956fa6f | 1900 | return SCM_I_MAKINUM (c); |
f872b822 | 1901 | } |
ca46fb90 | 1902 | else if (SCM_BIGP (n)) |
f872b822 | 1903 | { |
ca46fb90 | 1904 | unsigned long count; |
713a4259 KR |
1905 | if (mpz_sgn (SCM_I_BIG_MPZ (n)) >= 0) |
1906 | count = mpz_popcount (SCM_I_BIG_MPZ (n)); | |
ca46fb90 | 1907 | else |
713a4259 KR |
1908 | count = mpz_hamdist (SCM_I_BIG_MPZ (n), z_negative_one); |
1909 | scm_remember_upto_here_1 (n); | |
d956fa6f | 1910 | return SCM_I_MAKINUM (count); |
f872b822 | 1911 | } |
ca46fb90 RB |
1912 | else |
1913 | SCM_WRONG_TYPE_ARG (SCM_ARG1, n); | |
0f2d19dd | 1914 | } |
ca46fb90 | 1915 | #undef FUNC_NAME |
0f2d19dd JB |
1916 | |
1917 | ||
ca46fb90 RB |
1918 | static const char scm_ilentab[] = { |
1919 | 0, 1, 2, 2, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, 4, 4 | |
1920 | }; | |
1921 | ||
0f2d19dd | 1922 | |
ca46fb90 RB |
1923 | SCM_DEFINE (scm_integer_length, "integer-length", 1, 0, 0, |
1924 | (SCM n), | |
1925 | "Return the number of bits necessary to represent @var{n}.\n" | |
1926 | "\n" | |
1927 | "@lisp\n" | |
1928 | "(integer-length #b10101010)\n" | |
1929 | " @result{} 8\n" | |
1930 | "(integer-length 0)\n" | |
1931 | " @result{} 0\n" | |
1932 | "(integer-length #b1111)\n" | |
1933 | " @result{} 4\n" | |
1934 | "@end lisp") | |
1935 | #define FUNC_NAME s_scm_integer_length | |
1936 | { | |
0aacf84e MD |
1937 | if (SCM_INUMP (n)) |
1938 | { | |
1939 | unsigned long int c = 0; | |
1940 | unsigned int l = 4; | |
1941 | long int nn = SCM_INUM (n); | |
1942 | if (nn < 0) | |
1943 | nn = -1 - nn; | |
1944 | while (nn) | |
1945 | { | |
1946 | c += 4; | |
1947 | l = scm_ilentab [15 & nn]; | |
1948 | nn >>= 4; | |
1949 | } | |
d956fa6f | 1950 | return SCM_I_MAKINUM (c - 4 + l); |
0aacf84e MD |
1951 | } |
1952 | else if (SCM_BIGP (n)) | |
1953 | { | |
1954 | /* mpz_sizeinbase looks at the absolute value of negatives, whereas we | |
1955 | want a ones-complement. If n is ...111100..00 then mpz_sizeinbase is | |
1956 | 1 too big, so check for that and adjust. */ | |
1957 | size_t size = mpz_sizeinbase (SCM_I_BIG_MPZ (n), 2); | |
1958 | if (mpz_sgn (SCM_I_BIG_MPZ (n)) < 0 | |
1959 | && mpz_scan0 (SCM_I_BIG_MPZ (n), /* no 0 bits above the lowest 1 */ | |
1960 | mpz_scan1 (SCM_I_BIG_MPZ (n), 0)) == ULONG_MAX) | |
1961 | size--; | |
1962 | scm_remember_upto_here_1 (n); | |
d956fa6f | 1963 | return SCM_I_MAKINUM (size); |
0aacf84e MD |
1964 | } |
1965 | else | |
ca46fb90 | 1966 | SCM_WRONG_TYPE_ARG (SCM_ARG1, n); |
ca46fb90 RB |
1967 | } |
1968 | #undef FUNC_NAME | |
0f2d19dd JB |
1969 | |
1970 | /*** NUMBERS -> STRINGS ***/ | |
0b799eea MV |
1971 | #define SCM_MAX_DBL_PREC 60 |
1972 | #define SCM_MAX_DBL_RADIX 36 | |
1973 | ||
1974 | /* this is an array starting with radix 2, and ending with radix SCM_MAX_DBL_RADIX */ | |
1975 | static int scm_dblprec[SCM_MAX_DBL_RADIX - 1]; | |
1976 | static double fx_per_radix[SCM_MAX_DBL_RADIX - 1][SCM_MAX_DBL_PREC]; | |
1977 | ||
1978 | static | |
1979 | void init_dblprec(int *prec, int radix) { | |
1980 | /* determine floating point precision by adding successively | |
1981 | smaller increments to 1.0 until it is considered == 1.0 */ | |
1982 | double f = ((double)1.0)/radix; | |
1983 | double fsum = 1.0 + f; | |
1984 | ||
1985 | *prec = 0; | |
1986 | while (fsum != 1.0) | |
1987 | { | |
1988 | if (++(*prec) > SCM_MAX_DBL_PREC) | |
1989 | fsum = 1.0; | |
1990 | else | |
1991 | { | |
1992 | f /= radix; | |
1993 | fsum = f + 1.0; | |
1994 | } | |
1995 | } | |
1996 | (*prec) -= 1; | |
1997 | } | |
1998 | ||
1999 | static | |
2000 | void init_fx_radix(double *fx_list, int radix) | |
2001 | { | |
2002 | /* initialize a per-radix list of tolerances. When added | |
2003 | to a number < 1.0, we can determine if we should raund | |
2004 | up and quit converting a number to a string. */ | |
2005 | int i; | |
2006 | fx_list[0] = 0.0; | |
2007 | fx_list[1] = 0.5; | |
2008 | for( i = 2 ; i < SCM_MAX_DBL_PREC; ++i ) | |
2009 | fx_list[i] = (fx_list[i-1] / radix); | |
2010 | } | |
2011 | ||
2012 | /* use this array as a way to generate a single digit */ | |
2013 | static const char*number_chars="0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ"; | |
0f2d19dd | 2014 | |
1be6b49c | 2015 | static size_t |
0b799eea | 2016 | idbl2str (double f, char *a, int radix) |
0f2d19dd | 2017 | { |
0b799eea MV |
2018 | int efmt, dpt, d, i, wp; |
2019 | double *fx; | |
2020 | #ifdef DBL_MIN_10_EXP | |
2021 | double f_cpy; | |
2022 | int exp_cpy; | |
2023 | #endif /* DBL_MIN_10_EXP */ | |
2024 | size_t ch = 0; | |
2025 | int exp = 0; | |
2026 | ||
2027 | if(radix < 2 || | |
2028 | radix > SCM_MAX_DBL_RADIX) | |
2029 | { | |
2030 | /* revert to existing behavior */ | |
2031 | radix = 10; | |
2032 | } | |
2033 | ||
2034 | wp = scm_dblprec[radix-2]; | |
2035 | fx = fx_per_radix[radix-2]; | |
0f2d19dd | 2036 | |
f872b822 | 2037 | if (f == 0.0) |
abb7e44d MV |
2038 | { |
2039 | #ifdef HAVE_COPYSIGN | |
2040 | double sgn = copysign (1.0, f); | |
2041 | ||
2042 | if (sgn < 0.0) | |
2043 | a[ch++] = '-'; | |
2044 | #endif | |
abb7e44d MV |
2045 | goto zero; /*{a[0]='0'; a[1]='.'; a[2]='0'; return 3;} */ |
2046 | } | |
7351e207 MV |
2047 | |
2048 | if (xisinf (f)) | |
2049 | { | |
2050 | if (f < 0) | |
2051 | strcpy (a, "-inf.0"); | |
2052 | else | |
2053 | strcpy (a, "+inf.0"); | |
2054 | return ch+6; | |
2055 | } | |
2056 | else if (xisnan (f)) | |
2057 | { | |
2058 | strcpy (a, "+nan.0"); | |
2059 | return ch+6; | |
2060 | } | |
2061 | ||
f872b822 MD |
2062 | if (f < 0.0) |
2063 | { | |
2064 | f = -f; | |
2065 | a[ch++] = '-'; | |
2066 | } | |
7351e207 | 2067 | |
f872b822 MD |
2068 | #ifdef DBL_MIN_10_EXP /* Prevent unnormalized values, as from |
2069 | make-uniform-vector, from causing infinite loops. */ | |
0b799eea MV |
2070 | /* just do the checking...if it passes, we do the conversion for our |
2071 | radix again below */ | |
2072 | f_cpy = f; | |
2073 | exp_cpy = exp; | |
2074 | ||
2075 | while (f_cpy < 1.0) | |
f872b822 | 2076 | { |
0b799eea MV |
2077 | f_cpy *= 10.0; |
2078 | if (exp_cpy-- < DBL_MIN_10_EXP) | |
7351e207 MV |
2079 | { |
2080 | a[ch++] = '#'; | |
2081 | a[ch++] = '.'; | |
2082 | a[ch++] = '#'; | |
2083 | return ch; | |
2084 | } | |
f872b822 | 2085 | } |
0b799eea | 2086 | while (f_cpy > 10.0) |
f872b822 | 2087 | { |
0b799eea MV |
2088 | f_cpy *= 0.10; |
2089 | if (exp_cpy++ > DBL_MAX_10_EXP) | |
7351e207 MV |
2090 | { |
2091 | a[ch++] = '#'; | |
2092 | a[ch++] = '.'; | |
2093 | a[ch++] = '#'; | |
2094 | return ch; | |
2095 | } | |
f872b822 | 2096 | } |
0b799eea MV |
2097 | #endif |
2098 | ||
f872b822 MD |
2099 | while (f < 1.0) |
2100 | { | |
0b799eea | 2101 | f *= radix; |
f872b822 MD |
2102 | exp--; |
2103 | } | |
0b799eea | 2104 | while (f > radix) |
f872b822 | 2105 | { |
0b799eea | 2106 | f /= radix; |
f872b822 MD |
2107 | exp++; |
2108 | } | |
0b799eea MV |
2109 | |
2110 | if (f + fx[wp] >= radix) | |
f872b822 MD |
2111 | { |
2112 | f = 1.0; | |
2113 | exp++; | |
2114 | } | |
0f2d19dd | 2115 | zero: |
0b799eea MV |
2116 | #ifdef ENGNOT |
2117 | /* adding 9999 makes this equivalent to abs(x) % 3 */ | |
f872b822 | 2118 | dpt = (exp + 9999) % 3; |
0f2d19dd JB |
2119 | exp -= dpt++; |
2120 | efmt = 1; | |
f872b822 MD |
2121 | #else |
2122 | efmt = (exp < -3) || (exp > wp + 2); | |
0f2d19dd | 2123 | if (!efmt) |
cda139a7 MD |
2124 | { |
2125 | if (exp < 0) | |
2126 | { | |
2127 | a[ch++] = '0'; | |
2128 | a[ch++] = '.'; | |
2129 | dpt = exp; | |
f872b822 MD |
2130 | while (++dpt) |
2131 | a[ch++] = '0'; | |
cda139a7 MD |
2132 | } |
2133 | else | |
f872b822 | 2134 | dpt = exp + 1; |
cda139a7 | 2135 | } |
0f2d19dd JB |
2136 | else |
2137 | dpt = 1; | |
f872b822 MD |
2138 | #endif |
2139 | ||
2140 | do | |
2141 | { | |
2142 | d = f; | |
2143 | f -= d; | |
0b799eea | 2144 | a[ch++] = number_chars[d]; |
f872b822 MD |
2145 | if (f < fx[wp]) |
2146 | break; | |
2147 | if (f + fx[wp] >= 1.0) | |
2148 | { | |
0b799eea | 2149 | a[ch - 1] = number_chars[d+1]; |
f872b822 MD |
2150 | break; |
2151 | } | |
0b799eea | 2152 | f *= radix; |
f872b822 MD |
2153 | if (!(--dpt)) |
2154 | a[ch++] = '.'; | |
0f2d19dd | 2155 | } |
f872b822 | 2156 | while (wp--); |
0f2d19dd JB |
2157 | |
2158 | if (dpt > 0) | |
cda139a7 | 2159 | { |
f872b822 | 2160 | #ifndef ENGNOT |
cda139a7 MD |
2161 | if ((dpt > 4) && (exp > 6)) |
2162 | { | |
f872b822 | 2163 | d = (a[0] == '-' ? 2 : 1); |
cda139a7 | 2164 | for (i = ch++; i > d; i--) |
f872b822 | 2165 | a[i] = a[i - 1]; |
cda139a7 MD |
2166 | a[d] = '.'; |
2167 | efmt = 1; | |
2168 | } | |
2169 | else | |
f872b822 | 2170 | #endif |
cda139a7 | 2171 | { |
f872b822 MD |
2172 | while (--dpt) |
2173 | a[ch++] = '0'; | |
cda139a7 MD |
2174 | a[ch++] = '.'; |
2175 | } | |
2176 | } | |
f872b822 MD |
2177 | if (a[ch - 1] == '.') |
2178 | a[ch++] = '0'; /* trailing zero */ | |
2179 | if (efmt && exp) | |
2180 | { | |
2181 | a[ch++] = 'e'; | |
2182 | if (exp < 0) | |
2183 | { | |
2184 | exp = -exp; | |
2185 | a[ch++] = '-'; | |
2186 | } | |
0b799eea MV |
2187 | for (i = radix; i <= exp; i *= radix); |
2188 | for (i /= radix; i; i /= radix) | |
f872b822 | 2189 | { |
0b799eea | 2190 | a[ch++] = number_chars[exp / i]; |
f872b822 MD |
2191 | exp %= i; |
2192 | } | |
0f2d19dd | 2193 | } |
0f2d19dd JB |
2194 | return ch; |
2195 | } | |
2196 | ||
1be6b49c | 2197 | static size_t |
0b799eea | 2198 | iflo2str (SCM flt, char *str, int radix) |
0f2d19dd | 2199 | { |
1be6b49c | 2200 | size_t i; |
3c9a524f | 2201 | if (SCM_REALP (flt)) |
0b799eea | 2202 | i = idbl2str (SCM_REAL_VALUE (flt), str, radix); |
0f2d19dd | 2203 | else |
f872b822 | 2204 | { |
0b799eea | 2205 | i = idbl2str (SCM_COMPLEX_REAL (flt), str, radix); |
f3ae5d60 MD |
2206 | if (SCM_COMPLEX_IMAG (flt) != 0.0) |
2207 | { | |
7351e207 MV |
2208 | double imag = SCM_COMPLEX_IMAG (flt); |
2209 | /* Don't output a '+' for negative numbers or for Inf and | |
2210 | NaN. They will provide their own sign. */ | |
2211 | if (0 <= imag && !xisinf (imag) && !xisnan (imag)) | |
f3ae5d60 | 2212 | str[i++] = '+'; |
0b799eea | 2213 | i += idbl2str (imag, &str[i], radix); |
f3ae5d60 MD |
2214 | str[i++] = 'i'; |
2215 | } | |
f872b822 | 2216 | } |
0f2d19dd JB |
2217 | return i; |
2218 | } | |
0f2d19dd | 2219 | |
5c11cc9d | 2220 | /* convert a long to a string (unterminated). returns the number of |
1bbd0b84 GB |
2221 | characters in the result. |
2222 | rad is output base | |
2223 | p is destination: worst case (base 2) is SCM_INTBUFLEN */ | |
1be6b49c | 2224 | size_t |
1bbd0b84 | 2225 | scm_iint2str (long num, int rad, char *p) |
0f2d19dd | 2226 | { |
1be6b49c ML |
2227 | size_t j = 1; |
2228 | size_t i; | |
5c11cc9d GH |
2229 | unsigned long n = (num < 0) ? -num : num; |
2230 | ||
f872b822 | 2231 | for (n /= rad; n > 0; n /= rad) |
5c11cc9d GH |
2232 | j++; |
2233 | ||
2234 | i = j; | |
2235 | if (num < 0) | |
f872b822 | 2236 | { |
f872b822 | 2237 | *p++ = '-'; |
5c11cc9d GH |
2238 | j++; |
2239 | n = -num; | |
f872b822 | 2240 | } |
5c11cc9d GH |
2241 | else |
2242 | n = num; | |
f872b822 MD |
2243 | while (i--) |
2244 | { | |
5c11cc9d GH |
2245 | int d = n % rad; |
2246 | ||
f872b822 MD |
2247 | n /= rad; |
2248 | p[i] = d + ((d < 10) ? '0' : 'a' - 10); | |
2249 | } | |
0f2d19dd JB |
2250 | return j; |
2251 | } | |
2252 | ||
a1ec6916 | 2253 | SCM_DEFINE (scm_number_to_string, "number->string", 1, 1, 0, |
bb628794 DH |
2254 | (SCM n, SCM radix), |
2255 | "Return a string holding the external representation of the\n" | |
942e5b91 MG |
2256 | "number @var{n} in the given @var{radix}. If @var{n} is\n" |
2257 | "inexact, a radix of 10 will be used.") | |
1bbd0b84 | 2258 | #define FUNC_NAME s_scm_number_to_string |
0f2d19dd | 2259 | { |
1bbd0b84 | 2260 | int base; |
98cb6e75 | 2261 | |
0aacf84e | 2262 | if (SCM_UNBNDP (radix)) |
98cb6e75 | 2263 | base = 10; |
0aacf84e | 2264 | else |
5efd3c7d | 2265 | base = scm_to_signed_integer (radix, 2, 36); |
98cb6e75 | 2266 | |
0aacf84e MD |
2267 | if (SCM_INUMP (n)) |
2268 | { | |
2269 | char num_buf [SCM_INTBUFLEN]; | |
2270 | size_t length = scm_iint2str (SCM_INUM (n), base, num_buf); | |
2271 | return scm_mem2string (num_buf, length); | |
2272 | } | |
2273 | else if (SCM_BIGP (n)) | |
2274 | { | |
2275 | char *str = mpz_get_str (NULL, base, SCM_I_BIG_MPZ (n)); | |
2276 | scm_remember_upto_here_1 (n); | |
2277 | return scm_take0str (str); | |
2278 | } | |
f92e85f7 MV |
2279 | else if (SCM_FRACTIONP (n)) |
2280 | { | |
2281 | scm_i_fraction_reduce (n); | |
2282 | return scm_string_append (scm_list_3 (scm_number_to_string (SCM_FRACTION_NUMERATOR (n), radix), | |
2283 | scm_mem2string ("/", 1), | |
2284 | scm_number_to_string (SCM_FRACTION_DENOMINATOR (n), radix))); | |
2285 | } | |
0aacf84e MD |
2286 | else if (SCM_INEXACTP (n)) |
2287 | { | |
2288 | char num_buf [FLOBUFLEN]; | |
0b799eea | 2289 | return scm_mem2string (num_buf, iflo2str (n, num_buf, base)); |
0aacf84e MD |
2290 | } |
2291 | else | |
bb628794 | 2292 | SCM_WRONG_TYPE_ARG (1, n); |
0f2d19dd | 2293 | } |
1bbd0b84 | 2294 | #undef FUNC_NAME |
0f2d19dd JB |
2295 | |
2296 | ||
ca46fb90 RB |
2297 | /* These print routines used to be stubbed here so that scm_repl.c |
2298 | wouldn't need SCM_BIGDIG conditionals (pre GMP) */ | |
1cc91f1b | 2299 | |
0f2d19dd | 2300 | int |
e81d98ec | 2301 | scm_print_real (SCM sexp, SCM port, scm_print_state *pstate SCM_UNUSED) |
0f2d19dd | 2302 | { |
56e55ac7 | 2303 | char num_buf[FLOBUFLEN]; |
0b799eea | 2304 | scm_lfwrite (num_buf, iflo2str (sexp, num_buf, 10), port); |
0f2d19dd JB |
2305 | return !0; |
2306 | } | |
2307 | ||
f3ae5d60 | 2308 | int |
e81d98ec | 2309 | scm_print_complex (SCM sexp, SCM port, scm_print_state *pstate SCM_UNUSED) |
f92e85f7 | 2310 | |
f3ae5d60 | 2311 | { |
56e55ac7 | 2312 | char num_buf[FLOBUFLEN]; |
0b799eea | 2313 | scm_lfwrite (num_buf, iflo2str (sexp, num_buf, 10), port); |
f3ae5d60 MD |
2314 | return !0; |
2315 | } | |
1cc91f1b | 2316 | |
f92e85f7 MV |
2317 | int |
2318 | scm_i_print_fraction (SCM sexp, SCM port, scm_print_state *pstate SCM_UNUSED) | |
2319 | { | |
2320 | SCM str; | |
2321 | scm_i_fraction_reduce (sexp); | |
2322 | str = scm_number_to_string (sexp, SCM_UNDEFINED); | |
2323 | scm_lfwrite (SCM_STRING_CHARS (str), SCM_STRING_LENGTH (str), port); | |
2324 | scm_remember_upto_here_1 (str); | |
2325 | return !0; | |
2326 | } | |
2327 | ||
0f2d19dd | 2328 | int |
e81d98ec | 2329 | scm_bigprint (SCM exp, SCM port, scm_print_state *pstate SCM_UNUSED) |
0f2d19dd | 2330 | { |
ca46fb90 RB |
2331 | char *str = mpz_get_str (NULL, 10, SCM_I_BIG_MPZ (exp)); |
2332 | scm_remember_upto_here_1 (exp); | |
2333 | scm_lfwrite (str, (size_t) strlen (str), port); | |
2334 | free (str); | |
0f2d19dd JB |
2335 | return !0; |
2336 | } | |
2337 | /*** END nums->strs ***/ | |
2338 | ||
3c9a524f | 2339 | |
0f2d19dd | 2340 | /*** STRINGS -> NUMBERS ***/ |
2a8fecee | 2341 | |
3c9a524f DH |
2342 | /* The following functions implement the conversion from strings to numbers. |
2343 | * The implementation somehow follows the grammar for numbers as it is given | |
2344 | * in R5RS. Thus, the functions resemble syntactic units (<ureal R>, | |
2345 | * <uinteger R>, ...) that are used to build up numbers in the grammar. Some | |
2346 | * points should be noted about the implementation: | |
2347 | * * Each function keeps a local index variable 'idx' that points at the | |
2348 | * current position within the parsed string. The global index is only | |
2349 | * updated if the function could parse the corresponding syntactic unit | |
2350 | * successfully. | |
2351 | * * Similarly, the functions keep track of indicators of inexactness ('#', | |
2352 | * '.' or exponents) using local variables ('hash_seen', 'x'). Again, the | |
2353 | * global exactness information is only updated after each part has been | |
2354 | * successfully parsed. | |
2355 | * * Sequences of digits are parsed into temporary variables holding fixnums. | |
2356 | * Only if these fixnums would overflow, the result variables are updated | |
2357 | * using the standard functions scm_add, scm_product, scm_divide etc. Then, | |
2358 | * the temporary variables holding the fixnums are cleared, and the process | |
2359 | * starts over again. If for example fixnums were able to store five decimal | |
2360 | * digits, a number 1234567890 would be parsed in two parts 12345 and 67890, | |
2361 | * and the result was computed as 12345 * 100000 + 67890. In other words, | |
2362 | * only every five digits two bignum operations were performed. | |
2363 | */ | |
2364 | ||
2365 | enum t_exactness {NO_EXACTNESS, INEXACT, EXACT}; | |
2366 | ||
2367 | /* R5RS, section 7.1.1, lexical structure of numbers: <uinteger R>. */ | |
2368 | ||
2369 | /* In non ASCII-style encodings the following macro might not work. */ | |
71df73ac KR |
2370 | #define XDIGIT2UINT(d) \ |
2371 | (isdigit ((int) (unsigned char) d) \ | |
2372 | ? (d) - '0' \ | |
2373 | : tolower ((int) (unsigned char) d) - 'a' + 10) | |
3c9a524f | 2374 | |
2a8fecee | 2375 | static SCM |
3c9a524f DH |
2376 | mem2uinteger (const char* mem, size_t len, unsigned int *p_idx, |
2377 | unsigned int radix, enum t_exactness *p_exactness) | |
2a8fecee | 2378 | { |
3c9a524f DH |
2379 | unsigned int idx = *p_idx; |
2380 | unsigned int hash_seen = 0; | |
2381 | scm_t_bits shift = 1; | |
2382 | scm_t_bits add = 0; | |
2383 | unsigned int digit_value; | |
2384 | SCM result; | |
2385 | char c; | |
2386 | ||
2387 | if (idx == len) | |
2388 | return SCM_BOOL_F; | |
2a8fecee | 2389 | |
3c9a524f | 2390 | c = mem[idx]; |
71df73ac | 2391 | if (!isxdigit ((int) (unsigned char) c)) |
3c9a524f DH |
2392 | return SCM_BOOL_F; |
2393 | digit_value = XDIGIT2UINT (c); | |
2394 | if (digit_value >= radix) | |
2395 | return SCM_BOOL_F; | |
2396 | ||
2397 | idx++; | |
d956fa6f | 2398 | result = SCM_I_MAKINUM (digit_value); |
3c9a524f | 2399 | while (idx != len) |
f872b822 | 2400 | { |
3c9a524f | 2401 | char c = mem[idx]; |
71df73ac | 2402 | if (isxdigit ((int) (unsigned char) c)) |
f872b822 | 2403 | { |
3c9a524f | 2404 | if (hash_seen) |
1fe5e088 | 2405 | break; |
3c9a524f DH |
2406 | digit_value = XDIGIT2UINT (c); |
2407 | if (digit_value >= radix) | |
1fe5e088 | 2408 | break; |
f872b822 | 2409 | } |
3c9a524f DH |
2410 | else if (c == '#') |
2411 | { | |
2412 | hash_seen = 1; | |
2413 | digit_value = 0; | |
2414 | } | |
2415 | else | |
2416 | break; | |
2417 | ||
2418 | idx++; | |
2419 | if (SCM_MOST_POSITIVE_FIXNUM / radix < shift) | |
2420 | { | |
d956fa6f | 2421 | result = scm_product (result, SCM_I_MAKINUM (shift)); |
3c9a524f | 2422 | if (add > 0) |
d956fa6f | 2423 | result = scm_sum (result, SCM_I_MAKINUM (add)); |
3c9a524f DH |
2424 | |
2425 | shift = radix; | |
2426 | add = digit_value; | |
2427 | } | |
2428 | else | |
2429 | { | |
2430 | shift = shift * radix; | |
2431 | add = add * radix + digit_value; | |
2432 | } | |
2433 | }; | |
2434 | ||
2435 | if (shift > 1) | |
d956fa6f | 2436 | result = scm_product (result, SCM_I_MAKINUM (shift)); |
3c9a524f | 2437 | if (add > 0) |
d956fa6f | 2438 | result = scm_sum (result, SCM_I_MAKINUM (add)); |
3c9a524f DH |
2439 | |
2440 | *p_idx = idx; | |
2441 | if (hash_seen) | |
2442 | *p_exactness = INEXACT; | |
2443 | ||
2444 | return result; | |
2a8fecee JB |
2445 | } |
2446 | ||
2447 | ||
3c9a524f DH |
2448 | /* R5RS, section 7.1.1, lexical structure of numbers: <decimal 10>. Only |
2449 | * covers the parts of the rules that start at a potential point. The value | |
2450 | * of the digits up to the point have been parsed by the caller and are given | |
79d34f68 DH |
2451 | * in variable result. The content of *p_exactness indicates, whether a hash |
2452 | * has already been seen in the digits before the point. | |
3c9a524f | 2453 | */ |
1cc91f1b | 2454 | |
3c9a524f DH |
2455 | /* In non ASCII-style encodings the following macro might not work. */ |
2456 | #define DIGIT2UINT(d) ((d) - '0') | |
2457 | ||
2458 | static SCM | |
79d34f68 | 2459 | mem2decimal_from_point (SCM result, const char* mem, size_t len, |
3c9a524f | 2460 | unsigned int *p_idx, enum t_exactness *p_exactness) |
0f2d19dd | 2461 | { |
3c9a524f DH |
2462 | unsigned int idx = *p_idx; |
2463 | enum t_exactness x = *p_exactness; | |
3c9a524f DH |
2464 | |
2465 | if (idx == len) | |
79d34f68 | 2466 | return result; |
3c9a524f DH |
2467 | |
2468 | if (mem[idx] == '.') | |
2469 | { | |
2470 | scm_t_bits shift = 1; | |
2471 | scm_t_bits add = 0; | |
2472 | unsigned int digit_value; | |
d956fa6f | 2473 | SCM big_shift = SCM_I_MAKINUM (1); |
3c9a524f DH |
2474 | |
2475 | idx++; | |
2476 | while (idx != len) | |
2477 | { | |
2478 | char c = mem[idx]; | |
71df73ac | 2479 | if (isdigit ((int) (unsigned char) c)) |
3c9a524f DH |
2480 | { |
2481 | if (x == INEXACT) | |
2482 | return SCM_BOOL_F; | |
2483 | else | |
2484 | digit_value = DIGIT2UINT (c); | |
2485 | } | |
2486 | else if (c == '#') | |
2487 | { | |
2488 | x = INEXACT; | |
2489 | digit_value = 0; | |
2490 | } | |
2491 | else | |
2492 | break; | |
2493 | ||
2494 | idx++; | |
2495 | if (SCM_MOST_POSITIVE_FIXNUM / 10 < shift) | |
2496 | { | |
d956fa6f MV |
2497 | big_shift = scm_product (big_shift, SCM_I_MAKINUM (shift)); |
2498 | result = scm_product (result, SCM_I_MAKINUM (shift)); | |
3c9a524f | 2499 | if (add > 0) |
d956fa6f | 2500 | result = scm_sum (result, SCM_I_MAKINUM (add)); |
3c9a524f DH |
2501 | |
2502 | shift = 10; | |
2503 | add = digit_value; | |
2504 | } | |
2505 | else | |
2506 | { | |
2507 | shift = shift * 10; | |
2508 | add = add * 10 + digit_value; | |
2509 | } | |
2510 | }; | |
2511 | ||
2512 | if (add > 0) | |
2513 | { | |
d956fa6f MV |
2514 | big_shift = scm_product (big_shift, SCM_I_MAKINUM (shift)); |
2515 | result = scm_product (result, SCM_I_MAKINUM (shift)); | |
2516 | result = scm_sum (result, SCM_I_MAKINUM (add)); | |
3c9a524f DH |
2517 | } |
2518 | ||
d8592269 | 2519 | result = scm_divide (result, big_shift); |
79d34f68 | 2520 | |
3c9a524f DH |
2521 | /* We've seen a decimal point, thus the value is implicitly inexact. */ |
2522 | x = INEXACT; | |
f872b822 | 2523 | } |
3c9a524f | 2524 | |
3c9a524f | 2525 | if (idx != len) |
f872b822 | 2526 | { |
3c9a524f DH |
2527 | int sign = 1; |
2528 | unsigned int start; | |
2529 | char c; | |
2530 | int exponent; | |
2531 | SCM e; | |
2532 | ||
2533 | /* R5RS, section 7.1.1, lexical structure of numbers: <suffix> */ | |
2534 | ||
2535 | switch (mem[idx]) | |
f872b822 | 2536 | { |
3c9a524f DH |
2537 | case 'd': case 'D': |
2538 | case 'e': case 'E': | |
2539 | case 'f': case 'F': | |
2540 | case 'l': case 'L': | |
2541 | case 's': case 'S': | |
2542 | idx++; | |
2543 | start = idx; | |
2544 | c = mem[idx]; | |
2545 | if (c == '-') | |
2546 | { | |
2547 | idx++; | |
2548 | sign = -1; | |
2549 | c = mem[idx]; | |
2550 | } | |
2551 | else if (c == '+') | |
2552 | { | |
2553 | idx++; | |
2554 | sign = 1; | |
2555 | c = mem[idx]; | |
2556 | } | |
2557 | else | |
2558 | sign = 1; | |
2559 | ||
71df73ac | 2560 | if (!isdigit ((int) (unsigned char) c)) |
3c9a524f DH |
2561 | return SCM_BOOL_F; |
2562 | ||
2563 | idx++; | |
2564 | exponent = DIGIT2UINT (c); | |
2565 | while (idx != len) | |
f872b822 | 2566 | { |
3c9a524f | 2567 | char c = mem[idx]; |
71df73ac | 2568 | if (isdigit ((int) (unsigned char) c)) |
3c9a524f DH |
2569 | { |
2570 | idx++; | |
2571 | if (exponent <= SCM_MAXEXP) | |
2572 | exponent = exponent * 10 + DIGIT2UINT (c); | |
2573 | } | |
2574 | else | |
2575 | break; | |
f872b822 | 2576 | } |
3c9a524f DH |
2577 | |
2578 | if (exponent > SCM_MAXEXP) | |
f872b822 | 2579 | { |
3c9a524f DH |
2580 | size_t exp_len = idx - start; |
2581 | SCM exp_string = scm_mem2string (&mem[start], exp_len); | |
2582 | SCM exp_num = scm_string_to_number (exp_string, SCM_UNDEFINED); | |
2583 | scm_out_of_range ("string->number", exp_num); | |
f872b822 | 2584 | } |
3c9a524f | 2585 | |
d956fa6f | 2586 | e = scm_integer_expt (SCM_I_MAKINUM (10), SCM_I_MAKINUM (exponent)); |
3c9a524f DH |
2587 | if (sign == 1) |
2588 | result = scm_product (result, e); | |
2589 | else | |
f92e85f7 | 2590 | result = scm_divide2real (result, e); |
3c9a524f DH |
2591 | |
2592 | /* We've seen an exponent, thus the value is implicitly inexact. */ | |
2593 | x = INEXACT; | |
2594 | ||
f872b822 | 2595 | break; |
3c9a524f | 2596 | |
f872b822 | 2597 | default: |
3c9a524f | 2598 | break; |
f872b822 | 2599 | } |
0f2d19dd | 2600 | } |
3c9a524f DH |
2601 | |
2602 | *p_idx = idx; | |
2603 | if (x == INEXACT) | |
2604 | *p_exactness = x; | |
2605 | ||
2606 | return result; | |
0f2d19dd | 2607 | } |
0f2d19dd | 2608 | |
3c9a524f DH |
2609 | |
2610 | /* R5RS, section 7.1.1, lexical structure of numbers: <ureal R> */ | |
2611 | ||
2612 | static SCM | |
2613 | mem2ureal (const char* mem, size_t len, unsigned int *p_idx, | |
2614 | unsigned int radix, enum t_exactness *p_exactness) | |
0f2d19dd | 2615 | { |
3c9a524f | 2616 | unsigned int idx = *p_idx; |
164d2481 | 2617 | SCM result; |
3c9a524f DH |
2618 | |
2619 | if (idx == len) | |
2620 | return SCM_BOOL_F; | |
2621 | ||
7351e207 MV |
2622 | if (idx+5 <= len && !strncmp (mem+idx, "inf.0", 5)) |
2623 | { | |
2624 | *p_idx = idx+5; | |
2625 | return scm_inf (); | |
2626 | } | |
2627 | ||
2628 | if (idx+4 < len && !strncmp (mem+idx, "nan.", 4)) | |
2629 | { | |
2630 | enum t_exactness x = EXACT; | |
2631 | ||
d8592269 MV |
2632 | /* Cobble up the fractional part. We might want to set the |
2633 | NaN's mantissa from it. */ | |
7351e207 MV |
2634 | idx += 4; |
2635 | mem2uinteger (mem, len, &idx, 10, &x); | |
2636 | *p_idx = idx; | |
2637 | return scm_nan (); | |
2638 | } | |
2639 | ||
3c9a524f DH |
2640 | if (mem[idx] == '.') |
2641 | { | |
2642 | if (radix != 10) | |
2643 | return SCM_BOOL_F; | |
2644 | else if (idx + 1 == len) | |
2645 | return SCM_BOOL_F; | |
71df73ac | 2646 | else if (!isdigit ((int) (unsigned char) mem[idx + 1])) |
3c9a524f DH |
2647 | return SCM_BOOL_F; |
2648 | else | |
d956fa6f | 2649 | result = mem2decimal_from_point (SCM_I_MAKINUM (0), mem, len, |
164d2481 | 2650 | p_idx, p_exactness); |
f872b822 | 2651 | } |
3c9a524f DH |
2652 | else |
2653 | { | |
2654 | enum t_exactness x = EXACT; | |
2655 | SCM uinteger; | |
3c9a524f DH |
2656 | |
2657 | uinteger = mem2uinteger (mem, len, &idx, radix, &x); | |
73e4de09 | 2658 | if (scm_is_false (uinteger)) |
3c9a524f DH |
2659 | return SCM_BOOL_F; |
2660 | ||
2661 | if (idx == len) | |
2662 | result = uinteger; | |
2663 | else if (mem[idx] == '/') | |
f872b822 | 2664 | { |
3c9a524f DH |
2665 | SCM divisor; |
2666 | ||
2667 | idx++; | |
2668 | ||
2669 | divisor = mem2uinteger (mem, len, &idx, radix, &x); | |
73e4de09 | 2670 | if (scm_is_false (divisor)) |
3c9a524f DH |
2671 | return SCM_BOOL_F; |
2672 | ||
f92e85f7 MV |
2673 | /* both are int/big here, I assume */ |
2674 | result = scm_make_ratio (uinteger, divisor); | |
f872b822 | 2675 | } |
3c9a524f DH |
2676 | else if (radix == 10) |
2677 | { | |
2678 | result = mem2decimal_from_point (uinteger, mem, len, &idx, &x); | |
73e4de09 | 2679 | if (scm_is_false (result)) |
3c9a524f DH |
2680 | return SCM_BOOL_F; |
2681 | } | |
2682 | else | |
2683 | result = uinteger; | |
2684 | ||
2685 | *p_idx = idx; | |
2686 | if (x == INEXACT) | |
2687 | *p_exactness = x; | |
f872b822 | 2688 | } |
164d2481 MV |
2689 | |
2690 | /* When returning an inexact zero, make sure it is represented as a | |
2691 | floating point value so that we can change its sign. | |
2692 | */ | |
d956fa6f | 2693 | if (SCM_EQ_P (result, SCM_I_MAKINUM(0)) && *p_exactness == INEXACT) |
164d2481 MV |
2694 | result = scm_make_real (0.0); |
2695 | ||
2696 | return result; | |
3c9a524f | 2697 | } |
0f2d19dd | 2698 | |
0f2d19dd | 2699 | |
3c9a524f | 2700 | /* R5RS, section 7.1.1, lexical structure of numbers: <complex R> */ |
0f2d19dd | 2701 | |
3c9a524f DH |
2702 | static SCM |
2703 | mem2complex (const char* mem, size_t len, unsigned int idx, | |
2704 | unsigned int radix, enum t_exactness *p_exactness) | |
2705 | { | |
2706 | char c; | |
2707 | int sign = 0; | |
2708 | SCM ureal; | |
2709 | ||
2710 | if (idx == len) | |
2711 | return SCM_BOOL_F; | |
2712 | ||
2713 | c = mem[idx]; | |
2714 | if (c == '+') | |
2715 | { | |
2716 | idx++; | |
2717 | sign = 1; | |
2718 | } | |
2719 | else if (c == '-') | |
2720 | { | |
2721 | idx++; | |
2722 | sign = -1; | |
0f2d19dd | 2723 | } |
0f2d19dd | 2724 | |
3c9a524f DH |
2725 | if (idx == len) |
2726 | return SCM_BOOL_F; | |
2727 | ||
2728 | ureal = mem2ureal (mem, len, &idx, radix, p_exactness); | |
73e4de09 | 2729 | if (scm_is_false (ureal)) |
f872b822 | 2730 | { |
3c9a524f DH |
2731 | /* input must be either +i or -i */ |
2732 | ||
2733 | if (sign == 0) | |
2734 | return SCM_BOOL_F; | |
2735 | ||
2736 | if (mem[idx] == 'i' || mem[idx] == 'I') | |
f872b822 | 2737 | { |
3c9a524f DH |
2738 | idx++; |
2739 | if (idx != len) | |
2740 | return SCM_BOOL_F; | |
2741 | ||
d956fa6f | 2742 | return scm_make_rectangular (SCM_I_MAKINUM (0), SCM_I_MAKINUM (sign)); |
f872b822 | 2743 | } |
3c9a524f DH |
2744 | else |
2745 | return SCM_BOOL_F; | |
0f2d19dd | 2746 | } |
3c9a524f DH |
2747 | else |
2748 | { | |
73e4de09 | 2749 | if (sign == -1 && scm_is_false (scm_nan_p (ureal))) |
3c9a524f | 2750 | ureal = scm_difference (ureal, SCM_UNDEFINED); |
f872b822 | 2751 | |
3c9a524f DH |
2752 | if (idx == len) |
2753 | return ureal; | |
2754 | ||
2755 | c = mem[idx]; | |
2756 | switch (c) | |
f872b822 | 2757 | { |
3c9a524f DH |
2758 | case 'i': case 'I': |
2759 | /* either +<ureal>i or -<ureal>i */ | |
2760 | ||
2761 | idx++; | |
2762 | if (sign == 0) | |
2763 | return SCM_BOOL_F; | |
2764 | if (idx != len) | |
2765 | return SCM_BOOL_F; | |
d956fa6f | 2766 | return scm_make_rectangular (SCM_I_MAKINUM (0), ureal); |
3c9a524f DH |
2767 | |
2768 | case '@': | |
2769 | /* polar input: <real>@<real>. */ | |
2770 | ||
2771 | idx++; | |
2772 | if (idx == len) | |
2773 | return SCM_BOOL_F; | |
2774 | else | |
f872b822 | 2775 | { |
3c9a524f DH |
2776 | int sign; |
2777 | SCM angle; | |
2778 | SCM result; | |
2779 | ||
2780 | c = mem[idx]; | |
2781 | if (c == '+') | |
2782 | { | |
2783 | idx++; | |
2784 | sign = 1; | |
2785 | } | |
2786 | else if (c == '-') | |
2787 | { | |
2788 | idx++; | |
2789 | sign = -1; | |
2790 | } | |
2791 | else | |
2792 | sign = 1; | |
2793 | ||
2794 | angle = mem2ureal (mem, len, &idx, radix, p_exactness); | |
73e4de09 | 2795 | if (scm_is_false (angle)) |
3c9a524f DH |
2796 | return SCM_BOOL_F; |
2797 | if (idx != len) | |
2798 | return SCM_BOOL_F; | |
2799 | ||
73e4de09 | 2800 | if (sign == -1 && scm_is_false (scm_nan_p (ureal))) |
3c9a524f DH |
2801 | angle = scm_difference (angle, SCM_UNDEFINED); |
2802 | ||
2803 | result = scm_make_polar (ureal, angle); | |
2804 | return result; | |
f872b822 | 2805 | } |
3c9a524f DH |
2806 | case '+': |
2807 | case '-': | |
2808 | /* expecting input matching <real>[+-]<ureal>?i */ | |
0f2d19dd | 2809 | |
3c9a524f DH |
2810 | idx++; |
2811 | if (idx == len) | |
2812 | return SCM_BOOL_F; | |
2813 | else | |
2814 | { | |
2815 | int sign = (c == '+') ? 1 : -1; | |
2816 | SCM imag = mem2ureal (mem, len, &idx, radix, p_exactness); | |
0f2d19dd | 2817 | |
73e4de09 | 2818 | if (scm_is_false (imag)) |
d956fa6f | 2819 | imag = SCM_I_MAKINUM (sign); |
73e4de09 | 2820 | else if (sign == -1 && scm_is_false (scm_nan_p (ureal))) |
1fe5e088 | 2821 | imag = scm_difference (imag, SCM_UNDEFINED); |
0f2d19dd | 2822 | |
3c9a524f DH |
2823 | if (idx == len) |
2824 | return SCM_BOOL_F; | |
2825 | if (mem[idx] != 'i' && mem[idx] != 'I') | |
2826 | return SCM_BOOL_F; | |
0f2d19dd | 2827 | |
3c9a524f DH |
2828 | idx++; |
2829 | if (idx != len) | |
2830 | return SCM_BOOL_F; | |
0f2d19dd | 2831 | |
1fe5e088 | 2832 | return scm_make_rectangular (ureal, imag); |
3c9a524f DH |
2833 | } |
2834 | default: | |
2835 | return SCM_BOOL_F; | |
2836 | } | |
2837 | } | |
0f2d19dd | 2838 | } |
0f2d19dd JB |
2839 | |
2840 | ||
3c9a524f DH |
2841 | /* R5RS, section 7.1.1, lexical structure of numbers: <number> */ |
2842 | ||
2843 | enum t_radix {NO_RADIX=0, DUAL=2, OCT=8, DEC=10, HEX=16}; | |
1cc91f1b | 2844 | |
0f2d19dd | 2845 | SCM |
3c9a524f | 2846 | scm_i_mem2number (const char* mem, size_t len, unsigned int default_radix) |
0f2d19dd | 2847 | { |
3c9a524f DH |
2848 | unsigned int idx = 0; |
2849 | unsigned int radix = NO_RADIX; | |
2850 | enum t_exactness forced_x = NO_EXACTNESS; | |
2851 | enum t_exactness implicit_x = EXACT; | |
2852 | SCM result; | |
2853 | ||
2854 | /* R5RS, section 7.1.1, lexical structure of numbers: <prefix R> */ | |
2855 | while (idx + 2 < len && mem[idx] == '#') | |
2856 | { | |
2857 | switch (mem[idx + 1]) | |
2858 | { | |
2859 | case 'b': case 'B': | |
2860 | if (radix != NO_RADIX) | |
2861 | return SCM_BOOL_F; | |
2862 | radix = DUAL; | |
2863 | break; | |
2864 | case 'd': case 'D': | |
2865 | if (radix != NO_RADIX) | |
2866 | return SCM_BOOL_F; | |
2867 | radix = DEC; | |
2868 | break; | |
2869 | case 'i': case 'I': | |
2870 | if (forced_x != NO_EXACTNESS) | |
2871 | return SCM_BOOL_F; | |
2872 | forced_x = INEXACT; | |
2873 | break; | |
2874 | case 'e': case 'E': | |
2875 | if (forced_x != NO_EXACTNESS) | |
2876 | return SCM_BOOL_F; | |
2877 | forced_x = EXACT; | |
2878 | break; | |
2879 | case 'o': case 'O': | |
2880 | if (radix != NO_RADIX) | |
2881 | return SCM_BOOL_F; | |
2882 | radix = OCT; | |
2883 | break; | |
2884 | case 'x': case 'X': | |
2885 | if (radix != NO_RADIX) | |
2886 | return SCM_BOOL_F; | |
2887 | radix = HEX; | |
2888 | break; | |
2889 | default: | |
f872b822 | 2890 | return SCM_BOOL_F; |
3c9a524f DH |
2891 | } |
2892 | idx += 2; | |
2893 | } | |
2894 | ||
2895 | /* R5RS, section 7.1.1, lexical structure of numbers: <complex R> */ | |
2896 | if (radix == NO_RADIX) | |
2897 | result = mem2complex (mem, len, idx, default_radix, &implicit_x); | |
2898 | else | |
2899 | result = mem2complex (mem, len, idx, (unsigned int) radix, &implicit_x); | |
2900 | ||
73e4de09 | 2901 | if (scm_is_false (result)) |
3c9a524f | 2902 | return SCM_BOOL_F; |
f872b822 | 2903 | |
3c9a524f | 2904 | switch (forced_x) |
f872b822 | 2905 | { |
3c9a524f DH |
2906 | case EXACT: |
2907 | if (SCM_INEXACTP (result)) | |
3c9a524f DH |
2908 | return scm_inexact_to_exact (result); |
2909 | else | |
2910 | return result; | |
2911 | case INEXACT: | |
2912 | if (SCM_INEXACTP (result)) | |
2913 | return result; | |
2914 | else | |
2915 | return scm_exact_to_inexact (result); | |
2916 | case NO_EXACTNESS: | |
2917 | default: | |
2918 | if (implicit_x == INEXACT) | |
2919 | { | |
2920 | if (SCM_INEXACTP (result)) | |
2921 | return result; | |
2922 | else | |
2923 | return scm_exact_to_inexact (result); | |
2924 | } | |
2925 | else | |
2926 | return result; | |
f872b822 | 2927 | } |
0f2d19dd JB |
2928 | } |
2929 | ||
2930 | ||
a1ec6916 | 2931 | SCM_DEFINE (scm_string_to_number, "string->number", 1, 1, 0, |
bb628794 | 2932 | (SCM string, SCM radix), |
1e6808ea | 2933 | "Return a number of the maximally precise representation\n" |
942e5b91 | 2934 | "expressed by the given @var{string}. @var{radix} must be an\n" |
5352393c MG |
2935 | "exact integer, either 2, 8, 10, or 16. If supplied, @var{radix}\n" |
2936 | "is a default radix that may be overridden by an explicit radix\n" | |
2937 | "prefix in @var{string} (e.g. \"#o177\"). If @var{radix} is not\n" | |
2938 | "supplied, then the default radix is 10. If string is not a\n" | |
2939 | "syntactically valid notation for a number, then\n" | |
2940 | "@code{string->number} returns @code{#f}.") | |
1bbd0b84 | 2941 | #define FUNC_NAME s_scm_string_to_number |
0f2d19dd JB |
2942 | { |
2943 | SCM answer; | |
5efd3c7d | 2944 | unsigned int base; |
a6d9e5ab | 2945 | SCM_VALIDATE_STRING (1, string); |
5efd3c7d MV |
2946 | |
2947 | if (SCM_UNBNDP (radix)) | |
2948 | base = 10; | |
2949 | else | |
2950 | base = scm_to_unsigned_integer (radix, 2, INT_MAX); | |
2951 | ||
3c9a524f | 2952 | answer = scm_i_mem2number (SCM_STRING_CHARS (string), |
d8592269 MV |
2953 | SCM_STRING_LENGTH (string), |
2954 | base); | |
bb628794 | 2955 | return scm_return_first (answer, string); |
0f2d19dd | 2956 | } |
1bbd0b84 | 2957 | #undef FUNC_NAME |
3c9a524f DH |
2958 | |
2959 | ||
0f2d19dd JB |
2960 | /*** END strs->nums ***/ |
2961 | ||
5986c47d | 2962 | |
0f2d19dd | 2963 | SCM |
f3ae5d60 | 2964 | scm_make_real (double x) |
0f2d19dd | 2965 | { |
3553e1d1 GH |
2966 | SCM z = scm_double_cell (scm_tc16_real, 0, 0, 0); |
2967 | ||
3a9809df | 2968 | SCM_REAL_VALUE (z) = x; |
0f2d19dd JB |
2969 | return z; |
2970 | } | |
0f2d19dd | 2971 | |
5986c47d | 2972 | |
f3ae5d60 MD |
2973 | SCM |
2974 | scm_make_complex (double x, double y) | |
2975 | { | |
0aacf84e | 2976 | if (y == 0.0) |
3a9809df | 2977 | return scm_make_real (x); |
0aacf84e MD |
2978 | else |
2979 | { | |
2980 | SCM z; | |
29c4382a | 2981 | SCM_NEWSMOB (z, scm_tc16_complex, scm_gc_malloc (sizeof (scm_t_complex), |
0aacf84e MD |
2982 | "complex")); |
2983 | SCM_COMPLEX_REAL (z) = x; | |
2984 | SCM_COMPLEX_IMAG (z) = y; | |
2985 | return z; | |
2986 | } | |
f3ae5d60 | 2987 | } |
1cc91f1b | 2988 | |
5986c47d | 2989 | |
0f2d19dd | 2990 | SCM |
1bbd0b84 | 2991 | scm_bigequal (SCM x, SCM y) |
0f2d19dd | 2992 | { |
47ae1f0e | 2993 | int result = mpz_cmp (SCM_I_BIG_MPZ (x), SCM_I_BIG_MPZ (y)); |
ca46fb90 | 2994 | scm_remember_upto_here_2 (x, y); |
73e4de09 | 2995 | return scm_from_bool (0 == result); |
0f2d19dd JB |
2996 | } |
2997 | ||
0f2d19dd | 2998 | SCM |
f3ae5d60 | 2999 | scm_real_equalp (SCM x, SCM y) |
0f2d19dd | 3000 | { |
73e4de09 | 3001 | return scm_from_bool (SCM_REAL_VALUE (x) == SCM_REAL_VALUE (y)); |
0f2d19dd JB |
3002 | } |
3003 | ||
f3ae5d60 MD |
3004 | SCM |
3005 | scm_complex_equalp (SCM x, SCM y) | |
3006 | { | |
73e4de09 | 3007 | return scm_from_bool (SCM_COMPLEX_REAL (x) == SCM_COMPLEX_REAL (y) |
f3ae5d60 MD |
3008 | && SCM_COMPLEX_IMAG (x) == SCM_COMPLEX_IMAG (y)); |
3009 | } | |
0f2d19dd | 3010 | |
f92e85f7 MV |
3011 | SCM |
3012 | scm_i_fraction_equalp (SCM x, SCM y) | |
3013 | { | |
3014 | scm_i_fraction_reduce (x); | |
3015 | scm_i_fraction_reduce (y); | |
73e4de09 | 3016 | if (scm_is_false (scm_equal_p (SCM_FRACTION_NUMERATOR (x), |
02164269 | 3017 | SCM_FRACTION_NUMERATOR (y))) |
73e4de09 | 3018 | || scm_is_false (scm_equal_p (SCM_FRACTION_DENOMINATOR (x), |
02164269 MV |
3019 | SCM_FRACTION_DENOMINATOR (y)))) |
3020 | return SCM_BOOL_F; | |
3021 | else | |
3022 | return SCM_BOOL_T; | |
f92e85f7 | 3023 | } |
0f2d19dd JB |
3024 | |
3025 | ||
1bbd0b84 | 3026 | SCM_REGISTER_PROC (s_number_p, "number?", 1, 0, 0, scm_number_p); |
942e5b91 MG |
3027 | /* "Return @code{#t} if @var{x} is a number, @code{#f}\n" |
3028 | * "else. Note that the sets of complex, real, rational and\n" | |
3029 | * "integer values form subsets of the set of numbers, i. e. the\n" | |
3030 | * "predicate will be fulfilled for any number." | |
3031 | */ | |
a1ec6916 | 3032 | SCM_DEFINE (scm_number_p, "complex?", 1, 0, 0, |
1bbd0b84 | 3033 | (SCM x), |
942e5b91 | 3034 | "Return @code{#t} if @var{x} is a complex number, @code{#f}\n" |
bb2c02f2 | 3035 | "otherwise. Note that the sets of real, rational and integer\n" |
942e5b91 MG |
3036 | "values form subsets of the set of complex numbers, i. e. the\n" |
3037 | "predicate will also be fulfilled if @var{x} is a real,\n" | |
3038 | "rational or integer number.") | |
1bbd0b84 | 3039 | #define FUNC_NAME s_scm_number_p |
0f2d19dd | 3040 | { |
73e4de09 | 3041 | return scm_from_bool (SCM_NUMBERP (x)); |
0f2d19dd | 3042 | } |
1bbd0b84 | 3043 | #undef FUNC_NAME |
0f2d19dd JB |
3044 | |
3045 | ||
f92e85f7 MV |
3046 | SCM_DEFINE (scm_real_p, "real?", 1, 0, 0, |
3047 | (SCM x), | |
3048 | "Return @code{#t} if @var{x} is a real number, @code{#f}\n" | |
3049 | "otherwise. Note that the set of integer values forms a subset of\n" | |
3050 | "the set of real numbers, i. e. the predicate will also be\n" | |
3051 | "fulfilled if @var{x} is an integer number.") | |
3052 | #define FUNC_NAME s_scm_real_p | |
3053 | { | |
3054 | /* we can't represent irrational numbers. */ | |
3055 | return scm_rational_p (x); | |
3056 | } | |
3057 | #undef FUNC_NAME | |
3058 | ||
3059 | SCM_DEFINE (scm_rational_p, "rational?", 1, 0, 0, | |
1bbd0b84 | 3060 | (SCM x), |
942e5b91 | 3061 | "Return @code{#t} if @var{x} is a rational number, @code{#f}\n" |
bb2c02f2 | 3062 | "otherwise. Note that the set of integer values forms a subset of\n" |
942e5b91 | 3063 | "the set of rational numbers, i. e. the predicate will also be\n" |
f92e85f7 MV |
3064 | "fulfilled if @var{x} is an integer number.") |
3065 | #define FUNC_NAME s_scm_rational_p | |
0f2d19dd | 3066 | { |
0aacf84e | 3067 | if (SCM_INUMP (x)) |
0f2d19dd | 3068 | return SCM_BOOL_T; |
0aacf84e | 3069 | else if (SCM_IMP (x)) |
0f2d19dd | 3070 | return SCM_BOOL_F; |
0aacf84e | 3071 | else if (SCM_BIGP (x)) |
0f2d19dd | 3072 | return SCM_BOOL_T; |
f92e85f7 MV |
3073 | else if (SCM_FRACTIONP (x)) |
3074 | return SCM_BOOL_T; | |
3075 | else if (SCM_REALP (x)) | |
3076 | /* due to their limited precision, all floating point numbers are | |
3077 | rational as well. */ | |
3078 | return SCM_BOOL_T; | |
0aacf84e | 3079 | else |
bb628794 | 3080 | return SCM_BOOL_F; |
0f2d19dd | 3081 | } |
1bbd0b84 | 3082 | #undef FUNC_NAME |
0f2d19dd JB |
3083 | |
3084 | ||
a1ec6916 | 3085 | SCM_DEFINE (scm_integer_p, "integer?", 1, 0, 0, |
1bbd0b84 | 3086 | (SCM x), |
942e5b91 MG |
3087 | "Return @code{#t} if @var{x} is an integer number, @code{#f}\n" |
3088 | "else.") | |
1bbd0b84 | 3089 | #define FUNC_NAME s_scm_integer_p |
0f2d19dd JB |
3090 | { |
3091 | double r; | |
f872b822 MD |
3092 | if (SCM_INUMP (x)) |
3093 | return SCM_BOOL_T; | |
3094 | if (SCM_IMP (x)) | |
3095 | return SCM_BOOL_F; | |
f872b822 MD |
3096 | if (SCM_BIGP (x)) |
3097 | return SCM_BOOL_T; | |
3c9a524f | 3098 | if (!SCM_INEXACTP (x)) |
f872b822 | 3099 | return SCM_BOOL_F; |
3c9a524f | 3100 | if (SCM_COMPLEXP (x)) |
f872b822 | 3101 | return SCM_BOOL_F; |
5986c47d | 3102 | r = SCM_REAL_VALUE (x); |
f872b822 MD |
3103 | if (r == floor (r)) |
3104 | return SCM_BOOL_T; | |
0f2d19dd JB |
3105 | return SCM_BOOL_F; |
3106 | } | |
1bbd0b84 | 3107 | #undef FUNC_NAME |
0f2d19dd JB |
3108 | |
3109 | ||
a1ec6916 | 3110 | SCM_DEFINE (scm_inexact_p, "inexact?", 1, 0, 0, |
1bbd0b84 | 3111 | (SCM x), |
942e5b91 MG |
3112 | "Return @code{#t} if @var{x} is an inexact number, @code{#f}\n" |
3113 | "else.") | |
1bbd0b84 | 3114 | #define FUNC_NAME s_scm_inexact_p |
0f2d19dd | 3115 | { |
eb927cb9 MV |
3116 | if (SCM_INEXACTP (x)) |
3117 | return SCM_BOOL_T; | |
3118 | if (SCM_NUMBERP (x)) | |
3119 | return SCM_BOOL_F; | |
3120 | SCM_WRONG_TYPE_ARG (1, x); | |
0f2d19dd | 3121 | } |
1bbd0b84 | 3122 | #undef FUNC_NAME |
0f2d19dd JB |
3123 | |
3124 | ||
152f82bf | 3125 | SCM_GPROC1 (s_eq_p, "=", scm_tc7_rpsubr, scm_num_eq_p, g_eq_p); |
942e5b91 | 3126 | /* "Return @code{#t} if all parameters are numerically equal." */ |
0f2d19dd | 3127 | SCM |
6e8d25a6 | 3128 | scm_num_eq_p (SCM x, SCM y) |
0f2d19dd | 3129 | { |
d8b95e27 | 3130 | again: |
0aacf84e MD |
3131 | if (SCM_INUMP (x)) |
3132 | { | |
3133 | long xx = SCM_INUM (x); | |
3134 | if (SCM_INUMP (y)) | |
3135 | { | |
3136 | long yy = SCM_INUM (y); | |
73e4de09 | 3137 | return scm_from_bool (xx == yy); |
0aacf84e MD |
3138 | } |
3139 | else if (SCM_BIGP (y)) | |
3140 | return SCM_BOOL_F; | |
3141 | else if (SCM_REALP (y)) | |
73e4de09 | 3142 | return scm_from_bool ((double) xx == SCM_REAL_VALUE (y)); |
0aacf84e | 3143 | else if (SCM_COMPLEXP (y)) |
73e4de09 | 3144 | return scm_from_bool (((double) xx == SCM_COMPLEX_REAL (y)) |
0aacf84e | 3145 | && (0.0 == SCM_COMPLEX_IMAG (y))); |
f92e85f7 MV |
3146 | else if (SCM_FRACTIONP (y)) |
3147 | return SCM_BOOL_F; | |
0aacf84e MD |
3148 | else |
3149 | SCM_WTA_DISPATCH_2 (g_eq_p, x, y, SCM_ARGn, s_eq_p); | |
f872b822 | 3150 | } |
0aacf84e MD |
3151 | else if (SCM_BIGP (x)) |
3152 | { | |
3153 | if (SCM_INUMP (y)) | |
3154 | return SCM_BOOL_F; | |
3155 | else if (SCM_BIGP (y)) | |
3156 | { | |
3157 | int cmp = mpz_cmp (SCM_I_BIG_MPZ (x), SCM_I_BIG_MPZ (y)); | |
3158 | scm_remember_upto_here_2 (x, y); | |
73e4de09 | 3159 | return scm_from_bool (0 == cmp); |
0aacf84e MD |
3160 | } |
3161 | else if (SCM_REALP (y)) | |
3162 | { | |
3163 | int cmp; | |
3164 | if (xisnan (SCM_REAL_VALUE (y))) | |
3165 | return SCM_BOOL_F; | |
3166 | cmp = xmpz_cmp_d (SCM_I_BIG_MPZ (x), SCM_REAL_VALUE (y)); | |
3167 | scm_remember_upto_here_1 (x); | |
73e4de09 | 3168 | return scm_from_bool (0 == cmp); |
0aacf84e MD |
3169 | } |
3170 | else if (SCM_COMPLEXP (y)) | |
3171 | { | |
3172 | int cmp; | |
3173 | if (0.0 != SCM_COMPLEX_IMAG (y)) | |
3174 | return SCM_BOOL_F; | |
3175 | if (xisnan (SCM_COMPLEX_REAL (y))) | |
3176 | return SCM_BOOL_F; | |
3177 | cmp = xmpz_cmp_d (SCM_I_BIG_MPZ (x), SCM_COMPLEX_REAL (y)); | |
3178 | scm_remember_upto_here_1 (x); | |
73e4de09 | 3179 | return scm_from_bool (0 == cmp); |
0aacf84e | 3180 | } |
f92e85f7 MV |
3181 | else if (SCM_FRACTIONP (y)) |
3182 | return SCM_BOOL_F; | |
0aacf84e MD |
3183 | else |
3184 | SCM_WTA_DISPATCH_2 (g_eq_p, x, y, SCM_ARGn, s_eq_p); | |
f4c627b3 | 3185 | } |
0aacf84e MD |
3186 | else if (SCM_REALP (x)) |
3187 | { | |
3188 | if (SCM_INUMP (y)) | |
73e4de09 | 3189 | return scm_from_bool (SCM_REAL_VALUE (x) == (double) SCM_INUM (y)); |
0aacf84e MD |
3190 | else if (SCM_BIGP (y)) |
3191 | { | |
3192 | int cmp; | |
3193 | if (xisnan (SCM_REAL_VALUE (x))) | |
3194 | return SCM_BOOL_F; | |
3195 | cmp = xmpz_cmp_d (SCM_I_BIG_MPZ (y), SCM_REAL_VALUE (x)); | |
3196 | scm_remember_upto_here_1 (y); | |
73e4de09 | 3197 | return scm_from_bool (0 == cmp); |
0aacf84e MD |
3198 | } |
3199 | else if (SCM_REALP (y)) | |
73e4de09 | 3200 | return scm_from_bool (SCM_REAL_VALUE (x) == SCM_REAL_VALUE (y)); |
0aacf84e | 3201 | else if (SCM_COMPLEXP (y)) |
73e4de09 | 3202 | return scm_from_bool ((SCM_REAL_VALUE (x) == SCM_COMPLEX_REAL (y)) |
0aacf84e | 3203 | && (0.0 == SCM_COMPLEX_IMAG (y))); |
f92e85f7 | 3204 | else if (SCM_FRACTIONP (y)) |
d8b95e27 KR |
3205 | { |
3206 | double xx = SCM_REAL_VALUE (x); | |
3207 | if (xisnan (xx)) | |
3208 | return SCM_BOOL_F; | |
3209 | if (xisinf (xx)) | |
73e4de09 | 3210 | return scm_from_bool (xx < 0.0); |
d8b95e27 KR |
3211 | x = scm_inexact_to_exact (x); /* with x as frac or int */ |
3212 | goto again; | |
3213 | } | |
0aacf84e MD |
3214 | else |
3215 | SCM_WTA_DISPATCH_2 (g_eq_p, x, y, SCM_ARGn, s_eq_p); | |
f872b822 | 3216 | } |
0aacf84e MD |
3217 | else if (SCM_COMPLEXP (x)) |
3218 | { | |
3219 | if (SCM_INUMP (y)) | |
73e4de09 | 3220 | return scm_from_bool ((SCM_COMPLEX_REAL (x) == (double) SCM_INUM (y)) |
0aacf84e MD |
3221 | && (SCM_COMPLEX_IMAG (x) == 0.0)); |
3222 | else if (SCM_BIGP (y)) | |
3223 | { | |
3224 | int cmp; | |
3225 | if (0.0 != SCM_COMPLEX_IMAG (x)) | |
3226 | return SCM_BOOL_F; | |
3227 | if (xisnan (SCM_COMPLEX_REAL (x))) | |
3228 | return SCM_BOOL_F; | |
3229 | cmp = xmpz_cmp_d (SCM_I_BIG_MPZ (y), SCM_COMPLEX_REAL (x)); | |
3230 | scm_remember_upto_here_1 (y); | |
73e4de09 | 3231 | return scm_from_bool (0 == cmp); |
0aacf84e MD |
3232 | } |
3233 | else if (SCM_REALP (y)) | |
73e4de09 | 3234 | return scm_from_bool ((SCM_COMPLEX_REAL (x) == SCM_REAL_VALUE (y)) |
0aacf84e MD |
3235 | && (SCM_COMPLEX_IMAG (x) == 0.0)); |
3236 | else if (SCM_COMPLEXP (y)) | |
73e4de09 | 3237 | return scm_from_bool ((SCM_COMPLEX_REAL (x) == SCM_COMPLEX_REAL (y)) |
0aacf84e | 3238 | && (SCM_COMPLEX_IMAG (x) == SCM_COMPLEX_IMAG (y))); |
f92e85f7 | 3239 | else if (SCM_FRACTIONP (y)) |
d8b95e27 KR |
3240 | { |
3241 | double xx; | |
3242 | if (SCM_COMPLEX_IMAG (x) != 0.0) | |
3243 | return SCM_BOOL_F; | |
3244 | xx = SCM_COMPLEX_REAL (x); | |
3245 | if (xisnan (xx)) | |
3246 | return SCM_BOOL_F; | |
3247 | if (xisinf (xx)) | |
73e4de09 | 3248 | return scm_from_bool (xx < 0.0); |
d8b95e27 KR |
3249 | x = scm_inexact_to_exact (x); /* with x as frac or int */ |
3250 | goto again; | |
3251 | } | |
f92e85f7 MV |
3252 | else |
3253 | SCM_WTA_DISPATCH_2 (g_eq_p, x, y, SCM_ARGn, s_eq_p); | |
3254 | } | |
3255 | else if (SCM_FRACTIONP (x)) | |
3256 | { | |
3257 | if (SCM_INUMP (y)) | |
3258 | return SCM_BOOL_F; | |
3259 | else if (SCM_BIGP (y)) | |
3260 | return SCM_BOOL_F; | |
3261 | else if (SCM_REALP (y)) | |
d8b95e27 KR |
3262 | { |
3263 | double yy = SCM_REAL_VALUE (y); | |
3264 | if (xisnan (yy)) | |
3265 | return SCM_BOOL_F; | |
3266 | if (xisinf (yy)) | |
73e4de09 | 3267 | return scm_from_bool (0.0 < yy); |
d8b95e27 KR |
3268 | y = scm_inexact_to_exact (y); /* with y as frac or int */ |
3269 | goto again; | |
3270 | } | |
f92e85f7 | 3271 | else if (SCM_COMPLEXP (y)) |
d8b95e27 KR |
3272 | { |
3273 | double yy; | |
3274 | if (SCM_COMPLEX_IMAG (y) != 0.0) | |
3275 | return SCM_BOOL_F; | |
3276 | yy = SCM_COMPLEX_REAL (y); | |
3277 | if (xisnan (yy)) | |
3278 | return SCM_BOOL_F; | |
3279 | if (xisinf (yy)) | |
73e4de09 | 3280 | return scm_from_bool (0.0 < yy); |
d8b95e27 KR |
3281 | y = scm_inexact_to_exact (y); /* with y as frac or int */ |
3282 | goto again; | |
3283 | } | |
f92e85f7 MV |
3284 | else if (SCM_FRACTIONP (y)) |
3285 | return scm_i_fraction_equalp (x, y); | |
0aacf84e MD |
3286 | else |
3287 | SCM_WTA_DISPATCH_2 (g_eq_p, x, y, SCM_ARGn, s_eq_p); | |
f4c627b3 | 3288 | } |
0aacf84e | 3289 | else |
f4c627b3 | 3290 | SCM_WTA_DISPATCH_2 (g_eq_p, x, y, SCM_ARG1, s_eq_p); |
0f2d19dd JB |
3291 | } |
3292 | ||
3293 | ||
a5f0b599 KR |
3294 | /* OPTIMIZE-ME: For int/frac and frac/frac compares, the multiplications |
3295 | done are good for inums, but for bignums an answer can almost always be | |
3296 | had by just examining a few high bits of the operands, as done by GMP in | |
3297 | mpq_cmp. flonum/frac compares likewise, but with the slight complication | |
3298 | of the float exponent to take into account. */ | |
3299 | ||
152f82bf | 3300 | SCM_GPROC1 (s_less_p, "<", scm_tc7_rpsubr, scm_less_p, g_less_p); |
942e5b91 MG |
3301 | /* "Return @code{#t} if the list of parameters is monotonically\n" |
3302 | * "increasing." | |
3303 | */ | |
0f2d19dd | 3304 | SCM |
6e8d25a6 | 3305 | scm_less_p (SCM x, SCM y) |
0f2d19dd | 3306 | { |
a5f0b599 | 3307 | again: |
0aacf84e MD |
3308 | if (SCM_INUMP (x)) |
3309 | { | |
3310 | long xx = SCM_INUM (x); | |
3311 | if (SCM_INUMP (y)) | |
3312 | { | |
3313 | long yy = SCM_INUM (y); | |
73e4de09 | 3314 | return scm_from_bool (xx < yy); |
0aacf84e MD |
3315 | } |
3316 | else if (SCM_BIGP (y)) | |
3317 | { | |
3318 | int sgn = mpz_sgn (SCM_I_BIG_MPZ (y)); | |
3319 | scm_remember_upto_here_1 (y); | |
73e4de09 | 3320 | return scm_from_bool (sgn > 0); |
0aacf84e MD |
3321 | } |
3322 | else if (SCM_REALP (y)) | |
73e4de09 | 3323 | return scm_from_bool ((double) xx < SCM_REAL_VALUE (y)); |
f92e85f7 | 3324 | else if (SCM_FRACTIONP (y)) |
a5f0b599 KR |
3325 | { |
3326 | /* "x < a/b" becomes "x*b < a" */ | |
3327 | int_frac: | |
3328 | x = scm_product (x, SCM_FRACTION_DENOMINATOR (y)); | |
3329 | y = SCM_FRACTION_NUMERATOR (y); | |
3330 | goto again; | |
3331 | } | |
0aacf84e MD |
3332 | else |
3333 | SCM_WTA_DISPATCH_2 (g_less_p, x, y, SCM_ARGn, s_less_p); | |
f872b822 | 3334 | } |
0aacf84e MD |
3335 | else if (SCM_BIGP (x)) |
3336 | { | |
3337 | if (SCM_INUMP (y)) | |
3338 | { | |
3339 | int sgn = mpz_sgn (SCM_I_BIG_MPZ (x)); | |
3340 | scm_remember_upto_here_1 (x); | |
73e4de09 | 3341 | return scm_from_bool (sgn < 0); |
0aacf84e MD |
3342 | } |
3343 | else if (SCM_BIGP (y)) | |
3344 | { | |
3345 | int cmp = mpz_cmp (SCM_I_BIG_MPZ (x), SCM_I_BIG_MPZ (y)); | |
3346 | scm_remember_upto_here_2 (x, y); | |
73e4de09 | 3347 | return scm_from_bool (cmp < 0); |
0aacf84e MD |
3348 | } |
3349 | else if (SCM_REALP (y)) | |
3350 | { | |
3351 | int cmp; | |
3352 | if (xisnan (SCM_REAL_VALUE (y))) | |
3353 | return SCM_BOOL_F; | |
3354 | cmp = xmpz_cmp_d (SCM_I_BIG_MPZ (x), SCM_REAL_VALUE (y)); | |
3355 | scm_remember_upto_here_1 (x); | |
73e4de09 | 3356 | return scm_from_bool (cmp < 0); |
0aacf84e | 3357 | } |
f92e85f7 | 3358 | else if (SCM_FRACTIONP (y)) |
a5f0b599 | 3359 | goto int_frac; |
0aacf84e MD |
3360 | else |
3361 | SCM_WTA_DISPATCH_2 (g_less_p, x, y, SCM_ARGn, s_less_p); | |
f4c627b3 | 3362 | } |
0aacf84e MD |
3363 | else if (SCM_REALP (x)) |
3364 | { | |
3365 | if (SCM_INUMP (y)) | |
73e4de09 | 3366 | return scm_from_bool (SCM_REAL_VALUE (x) < (double) SCM_INUM (y)); |
0aacf84e MD |
3367 | else if (SCM_BIGP (y)) |
3368 | { | |
3369 | int cmp; | |
3370 | if (xisnan (SCM_REAL_VALUE (x))) | |
3371 | return SCM_BOOL_F; | |
3372 | cmp = xmpz_cmp_d (SCM_I_BIG_MPZ (y), SCM_REAL_VALUE (x)); | |
3373 | scm_remember_upto_here_1 (y); | |
73e4de09 | 3374 | return scm_from_bool (cmp > 0); |
0aacf84e MD |
3375 | } |
3376 | else if (SCM_REALP (y)) | |
73e4de09 | 3377 | return scm_from_bool (SCM_REAL_VALUE (x) < SCM_REAL_VALUE (y)); |
f92e85f7 | 3378 | else if (SCM_FRACTIONP (y)) |
a5f0b599 KR |
3379 | { |
3380 | double xx = SCM_REAL_VALUE (x); | |
3381 | if (xisnan (xx)) | |
3382 | return SCM_BOOL_F; | |
3383 | if (xisinf (xx)) | |
73e4de09 | 3384 | return scm_from_bool (xx < 0.0); |
a5f0b599 KR |
3385 | x = scm_inexact_to_exact (x); /* with x as frac or int */ |
3386 | goto again; | |
3387 | } | |
f92e85f7 MV |
3388 | else |
3389 | SCM_WTA_DISPATCH_2 (g_less_p, x, y, SCM_ARGn, s_less_p); | |
3390 | } | |
3391 | else if (SCM_FRACTIONP (x)) | |
3392 | { | |
a5f0b599 KR |
3393 | if (SCM_INUMP (y) || SCM_BIGP (y)) |
3394 | { | |
3395 | /* "a/b < y" becomes "a < y*b" */ | |
3396 | y = scm_product (y, SCM_FRACTION_DENOMINATOR (x)); | |
3397 | x = SCM_FRACTION_NUMERATOR (x); | |
3398 | goto again; | |
3399 | } | |
f92e85f7 | 3400 | else if (SCM_REALP (y)) |
a5f0b599 KR |
3401 | { |
3402 | double yy = SCM_REAL_VALUE (y); | |
3403 | if (xisnan (yy)) | |
3404 | return SCM_BOOL_F; | |
3405 | if (xisinf (yy)) | |
73e4de09 | 3406 | return scm_from_bool (0.0 < yy); |
a5f0b599 KR |
3407 | y = scm_inexact_to_exact (y); /* with y as frac or int */ |
3408 | goto again; | |
3409 | } | |
f92e85f7 | 3410 | else if (SCM_FRACTIONP (y)) |
a5f0b599 KR |
3411 | { |
3412 | /* "a/b < c/d" becomes "a*d < c*b" */ | |
3413 | SCM new_x = scm_product (SCM_FRACTION_NUMERATOR (x), | |
3414 | SCM_FRACTION_DENOMINATOR (y)); | |
3415 | SCM new_y = scm_product (SCM_FRACTION_NUMERATOR (y), | |
3416 | SCM_FRACTION_DENOMINATOR (x)); | |
3417 | x = new_x; | |
3418 | y = new_y; | |
3419 | goto again; | |
3420 | } | |
0aacf84e MD |
3421 | else |
3422 | SCM_WTA_DISPATCH_2 (g_less_p, x, y, SCM_ARGn, s_less_p); | |
f872b822 | 3423 | } |
0aacf84e | 3424 | else |
f4c627b3 | 3425 | SCM_WTA_DISPATCH_2 (g_less_p, x, y, SCM_ARG1, s_less_p); |
0f2d19dd JB |
3426 | } |
3427 | ||
3428 | ||
c76b1eaf | 3429 | SCM_GPROC1 (s_scm_gr_p, ">", scm_tc7_rpsubr, scm_gr_p, g_gr_p); |
942e5b91 MG |
3430 | /* "Return @code{#t} if the list of parameters is monotonically\n" |
3431 | * "decreasing." | |
c76b1eaf | 3432 | */ |
1bbd0b84 | 3433 | #define FUNC_NAME s_scm_gr_p |
c76b1eaf MD |
3434 | SCM |
3435 | scm_gr_p (SCM x, SCM y) | |
0f2d19dd | 3436 | { |
c76b1eaf MD |
3437 | if (!SCM_NUMBERP (x)) |
3438 | SCM_WTA_DISPATCH_2 (g_gr_p, x, y, SCM_ARG1, FUNC_NAME); | |
3439 | else if (!SCM_NUMBERP (y)) | |
3440 | SCM_WTA_DISPATCH_2 (g_gr_p, x, y, SCM_ARG2, FUNC_NAME); | |
3441 | else | |
3442 | return scm_less_p (y, x); | |
0f2d19dd | 3443 | } |
1bbd0b84 | 3444 | #undef FUNC_NAME |
0f2d19dd JB |
3445 | |
3446 | ||
c76b1eaf | 3447 | SCM_GPROC1 (s_scm_leq_p, "<=", scm_tc7_rpsubr, scm_leq_p, g_leq_p); |
942e5b91 | 3448 | /* "Return @code{#t} if the list of parameters is monotonically\n" |
c76b1eaf MD |
3449 | * "non-decreasing." |
3450 | */ | |
1bbd0b84 | 3451 | #define FUNC_NAME s_scm_leq_p |
c76b1eaf MD |
3452 | SCM |
3453 | scm_leq_p (SCM x, SCM y) | |
0f2d19dd | 3454 | { |
c76b1eaf MD |
3455 | if (!SCM_NUMBERP (x)) |
3456 | SCM_WTA_DISPATCH_2 (g_leq_p, x, y, SCM_ARG1, FUNC_NAME); | |
3457 | else if (!SCM_NUMBERP (y)) | |
3458 | SCM_WTA_DISPATCH_2 (g_leq_p, x, y, SCM_ARG2, FUNC_NAME); | |
73e4de09 | 3459 | else if (scm_is_true (scm_nan_p (x)) || scm_is_true (scm_nan_p (y))) |
fc194577 | 3460 | return SCM_BOOL_F; |
c76b1eaf | 3461 | else |
73e4de09 | 3462 | return scm_not (scm_less_p (y, x)); |
0f2d19dd | 3463 | } |
1bbd0b84 | 3464 | #undef FUNC_NAME |
0f2d19dd JB |
3465 | |
3466 | ||
c76b1eaf | 3467 | SCM_GPROC1 (s_scm_geq_p, ">=", scm_tc7_rpsubr, scm_geq_p, g_geq_p); |
942e5b91 | 3468 | /* "Return @code{#t} if the list of parameters is monotonically\n" |
c76b1eaf MD |
3469 | * "non-increasing." |
3470 | */ | |
1bbd0b84 | 3471 | #define FUNC_NAME s_scm_geq_p |
c76b1eaf MD |
3472 | SCM |
3473 | scm_geq_p (SCM x, SCM y) | |
0f2d19dd | 3474 | { |
c76b1eaf MD |
3475 | if (!SCM_NUMBERP (x)) |
3476 | SCM_WTA_DISPATCH_2 (g_geq_p, x, y, SCM_ARG1, FUNC_NAME); | |
3477 | else if (!SCM_NUMBERP (y)) | |
3478 | SCM_WTA_DISPATCH_2 (g_geq_p, x, y, SCM_ARG2, FUNC_NAME); | |
73e4de09 | 3479 | else if (scm_is_true (scm_nan_p (x)) || scm_is_true (scm_nan_p (y))) |
fc194577 | 3480 | return SCM_BOOL_F; |
c76b1eaf | 3481 | else |
73e4de09 | 3482 | return scm_not (scm_less_p (x, y)); |
0f2d19dd | 3483 | } |
1bbd0b84 | 3484 | #undef FUNC_NAME |
0f2d19dd JB |
3485 | |
3486 | ||
152f82bf | 3487 | SCM_GPROC (s_zero_p, "zero?", 1, 0, 0, scm_zero_p, g_zero_p); |
942e5b91 MG |
3488 | /* "Return @code{#t} if @var{z} is an exact or inexact number equal to\n" |
3489 | * "zero." | |
3490 | */ | |
0f2d19dd | 3491 | SCM |
6e8d25a6 | 3492 | scm_zero_p (SCM z) |
0f2d19dd | 3493 | { |
0aacf84e | 3494 | if (SCM_INUMP (z)) |
73e4de09 | 3495 | return scm_from_bool (SCM_EQ_P (z, SCM_INUM0)); |
0aacf84e | 3496 | else if (SCM_BIGP (z)) |
c2ff8ab0 | 3497 | return SCM_BOOL_F; |
0aacf84e | 3498 | else if (SCM_REALP (z)) |
73e4de09 | 3499 | return scm_from_bool (SCM_REAL_VALUE (z) == 0.0); |
0aacf84e | 3500 | else if (SCM_COMPLEXP (z)) |
73e4de09 | 3501 | return scm_from_bool (SCM_COMPLEX_REAL (z) == 0.0 |
c2ff8ab0 | 3502 | && SCM_COMPLEX_IMAG (z) == 0.0); |
f92e85f7 MV |
3503 | else if (SCM_FRACTIONP (z)) |
3504 | return SCM_BOOL_F; | |
0aacf84e | 3505 | else |
c2ff8ab0 | 3506 | SCM_WTA_DISPATCH_1 (g_zero_p, z, SCM_ARG1, s_zero_p); |
0f2d19dd JB |
3507 | } |
3508 | ||
3509 | ||
152f82bf | 3510 | SCM_GPROC (s_positive_p, "positive?", 1, 0, 0, scm_positive_p, g_positive_p); |
942e5b91 MG |
3511 | /* "Return @code{#t} if @var{x} is an exact or inexact number greater than\n" |
3512 | * "zero." | |
3513 | */ | |
0f2d19dd | 3514 | SCM |
6e8d25a6 | 3515 | scm_positive_p (SCM x) |
0f2d19dd | 3516 | { |
0aacf84e | 3517 | if (SCM_INUMP (x)) |
73e4de09 | 3518 | return scm_from_bool (SCM_INUM (x) > 0); |
0aacf84e MD |
3519 | else if (SCM_BIGP (x)) |
3520 | { | |
3521 | int sgn = mpz_sgn (SCM_I_BIG_MPZ (x)); | |
3522 | scm_remember_upto_here_1 (x); | |
73e4de09 | 3523 | return scm_from_bool (sgn > 0); |
0aacf84e MD |
3524 | } |
3525 | else if (SCM_REALP (x)) | |
73e4de09 | 3526 | return scm_from_bool(SCM_REAL_VALUE (x) > 0.0); |
f92e85f7 MV |
3527 | else if (SCM_FRACTIONP (x)) |
3528 | return scm_positive_p (SCM_FRACTION_NUMERATOR (x)); | |
0aacf84e | 3529 | else |
c2ff8ab0 | 3530 | SCM_WTA_DISPATCH_1 (g_positive_p, x, SCM_ARG1, s_positive_p); |
0f2d19dd JB |
3531 | } |
3532 | ||
3533 | ||
152f82bf | 3534 | SCM_GPROC (s_negative_p, "negative?", 1, 0, 0, scm_negative_p, g_negative_p); |
942e5b91 MG |
3535 | /* "Return @code{#t} if @var{x} is an exact or inexact number less than\n" |
3536 | * "zero." | |
3537 | */ | |
0f2d19dd | 3538 | SCM |
6e8d25a6 | 3539 | scm_negative_p (SCM x) |
0f2d19dd | 3540 | { |
0aacf84e | 3541 | if (SCM_INUMP (x)) |
73e4de09 | 3542 | return scm_from_bool (SCM_INUM (x) < 0); |
0aacf84e MD |
3543 | else if (SCM_BIGP (x)) |
3544 | { | |
3545 | int sgn = mpz_sgn (SCM_I_BIG_MPZ (x)); | |
3546 | scm_remember_upto_here_1 (x); | |
73e4de09 | 3547 | return scm_from_bool (sgn < 0); |
0aacf84e MD |
3548 | } |
3549 | else if (SCM_REALP (x)) | |
73e4de09 | 3550 | return scm_from_bool(SCM_REAL_VALUE (x) < 0.0); |
f92e85f7 MV |
3551 | else if (SCM_FRACTIONP (x)) |
3552 | return scm_negative_p (SCM_FRACTION_NUMERATOR (x)); | |
0aacf84e | 3553 | else |
c2ff8ab0 | 3554 | SCM_WTA_DISPATCH_1 (g_negative_p, x, SCM_ARG1, s_negative_p); |
0f2d19dd JB |
3555 | } |
3556 | ||
3557 | ||
2a06f791 KR |
3558 | /* scm_min and scm_max return an inexact when either argument is inexact, as |
3559 | required by r5rs. On that basis, for exact/inexact combinations the | |
3560 | exact is converted to inexact to compare and possibly return. This is | |
3561 | unlike scm_less_p above which takes some trouble to preserve all bits in | |
3562 | its test, such trouble is not required for min and max. */ | |
3563 | ||
9de33deb | 3564 | SCM_GPROC1 (s_max, "max", scm_tc7_asubr, scm_max, g_max); |
942e5b91 MG |
3565 | /* "Return the maximum of all parameter values." |
3566 | */ | |
0f2d19dd | 3567 | SCM |
6e8d25a6 | 3568 | scm_max (SCM x, SCM y) |
0f2d19dd | 3569 | { |
0aacf84e MD |
3570 | if (SCM_UNBNDP (y)) |
3571 | { | |
3572 | if (SCM_UNBNDP (x)) | |
3573 | SCM_WTA_DISPATCH_0 (g_max, s_max); | |
dab4e67a | 3574 | else if (SCM_INUMP(x) || SCM_BIGP(x) || SCM_REALP(x) || SCM_FRACTIONP(x)) |
0aacf84e MD |
3575 | return x; |
3576 | else | |
3577 | SCM_WTA_DISPATCH_1 (g_max, x, SCM_ARG1, s_max); | |
f872b822 | 3578 | } |
f4c627b3 | 3579 | |
0aacf84e MD |
3580 | if (SCM_INUMP (x)) |
3581 | { | |
3582 | long xx = SCM_INUM (x); | |
3583 | if (SCM_INUMP (y)) | |
3584 | { | |
3585 | long yy = SCM_INUM (y); | |
3586 | return (xx < yy) ? y : x; | |
3587 | } | |
3588 | else if (SCM_BIGP (y)) | |
3589 | { | |
3590 | int sgn = mpz_sgn (SCM_I_BIG_MPZ (y)); | |
3591 | scm_remember_upto_here_1 (y); | |
3592 | return (sgn < 0) ? x : y; | |
3593 | } | |
3594 | else if (SCM_REALP (y)) | |
3595 | { | |
3596 | double z = xx; | |
3597 | /* if y==NaN then ">" is false and we return NaN */ | |
3598 | return (z > SCM_REAL_VALUE (y)) ? scm_make_real (z) : y; | |
3599 | } | |
f92e85f7 MV |
3600 | else if (SCM_FRACTIONP (y)) |
3601 | { | |
e4bc5d6c | 3602 | use_less: |
73e4de09 | 3603 | return (scm_is_false (scm_less_p (x, y)) ? x : y); |
f92e85f7 | 3604 | } |
0aacf84e MD |
3605 | else |
3606 | SCM_WTA_DISPATCH_2 (g_max, x, y, SCM_ARGn, s_max); | |
f872b822 | 3607 | } |
0aacf84e MD |
3608 | else if (SCM_BIGP (x)) |
3609 | { | |
3610 | if (SCM_INUMP (y)) | |
3611 | { | |
3612 | int sgn = mpz_sgn (SCM_I_BIG_MPZ (x)); | |
3613 | scm_remember_upto_here_1 (x); | |
3614 | return (sgn < 0) ? y : x; | |
3615 | } | |
3616 | else if (SCM_BIGP (y)) | |
3617 | { | |
3618 | int cmp = mpz_cmp (SCM_I_BIG_MPZ (x), SCM_I_BIG_MPZ (y)); | |
3619 | scm_remember_upto_here_2 (x, y); | |
3620 | return (cmp > 0) ? x : y; | |
3621 | } | |
3622 | else if (SCM_REALP (y)) | |
3623 | { | |
2a06f791 KR |
3624 | /* if y==NaN then xx>yy is false, so we return the NaN y */ |
3625 | double xx, yy; | |
3626 | big_real: | |
3627 | xx = scm_i_big2dbl (x); | |
3628 | yy = SCM_REAL_VALUE (y); | |
3629 | return (xx > yy ? scm_make_real (xx) : y); | |
0aacf84e | 3630 | } |
f92e85f7 MV |
3631 | else if (SCM_FRACTIONP (y)) |
3632 | { | |
e4bc5d6c | 3633 | goto use_less; |
f92e85f7 | 3634 | } |
0aacf84e MD |
3635 | else |
3636 | SCM_WTA_DISPATCH_2 (g_max, x, y, SCM_ARGn, s_max); | |
f4c627b3 | 3637 | } |
0aacf84e MD |
3638 | else if (SCM_REALP (x)) |
3639 | { | |
3640 | if (SCM_INUMP (y)) | |
3641 | { | |
3642 | double z = SCM_INUM (y); | |
3643 | /* if x==NaN then "<" is false and we return NaN */ | |
3644 | return (SCM_REAL_VALUE (x) < z) ? scm_make_real (z) : x; | |
3645 | } | |
3646 | else if (SCM_BIGP (y)) | |
3647 | { | |
b6f8f763 | 3648 | SCM_SWAP (x, y); |
2a06f791 | 3649 | goto big_real; |
0aacf84e MD |
3650 | } |
3651 | else if (SCM_REALP (y)) | |
3652 | { | |
3653 | /* if x==NaN then our explicit check means we return NaN | |
3654 | if y==NaN then ">" is false and we return NaN | |
3655 | calling isnan is unavoidable, since it's the only way to know | |
3656 | which of x or y causes any compares to be false */ | |
3657 | double xx = SCM_REAL_VALUE (x); | |
3658 | return (xisnan (xx) || xx > SCM_REAL_VALUE (y)) ? x : y; | |
3659 | } | |
f92e85f7 MV |
3660 | else if (SCM_FRACTIONP (y)) |
3661 | { | |
3662 | double yy = scm_i_fraction2double (y); | |
3663 | double xx = SCM_REAL_VALUE (x); | |
3664 | return (xx < yy) ? scm_make_real (yy) : x; | |
3665 | } | |
3666 | else | |
3667 | SCM_WTA_DISPATCH_2 (g_max, x, y, SCM_ARGn, s_max); | |
3668 | } | |
3669 | else if (SCM_FRACTIONP (x)) | |
3670 | { | |
3671 | if (SCM_INUMP (y)) | |
3672 | { | |
e4bc5d6c | 3673 | goto use_less; |
f92e85f7 MV |
3674 | } |
3675 | else if (SCM_BIGP (y)) | |
3676 | { | |
e4bc5d6c | 3677 | goto use_less; |
f92e85f7 MV |
3678 | } |
3679 | else if (SCM_REALP (y)) | |
3680 | { | |
3681 | double xx = scm_i_fraction2double (x); | |
3682 | return (xx < SCM_REAL_VALUE (y)) ? y : scm_make_real (xx); | |
3683 | } | |
3684 | else if (SCM_FRACTIONP (y)) | |
3685 | { | |
e4bc5d6c | 3686 | goto use_less; |
f92e85f7 | 3687 | } |
0aacf84e MD |
3688 | else |
3689 | SCM_WTA_DISPATCH_2 (g_max, x, y, SCM_ARGn, s_max); | |
f872b822 | 3690 | } |
0aacf84e | 3691 | else |
f4c627b3 | 3692 | SCM_WTA_DISPATCH_2 (g_max, x, y, SCM_ARG1, s_max); |
0f2d19dd JB |
3693 | } |
3694 | ||
3695 | ||
9de33deb | 3696 | SCM_GPROC1 (s_min, "min", scm_tc7_asubr, scm_min, g_min); |
942e5b91 MG |
3697 | /* "Return the minium of all parameter values." |
3698 | */ | |
0f2d19dd | 3699 | SCM |
6e8d25a6 | 3700 | scm_min (SCM x, SCM y) |
0f2d19dd | 3701 | { |
0aacf84e MD |
3702 | if (SCM_UNBNDP (y)) |
3703 | { | |
3704 | if (SCM_UNBNDP (x)) | |
3705 | SCM_WTA_DISPATCH_0 (g_min, s_min); | |
dab4e67a | 3706 | else if (SCM_INUMP(x) || SCM_BIGP(x) || SCM_REALP(x) || SCM_FRACTIONP(x)) |
0aacf84e MD |
3707 | return x; |
3708 | else | |
3709 | SCM_WTA_DISPATCH_1 (g_min, x, SCM_ARG1, s_min); | |
f872b822 | 3710 | } |
f4c627b3 | 3711 | |
0aacf84e MD |
3712 | if (SCM_INUMP (x)) |
3713 | { | |
3714 | long xx = SCM_INUM (x); | |
3715 | if (SCM_INUMP (y)) | |
3716 | { | |
3717 | long yy = SCM_INUM (y); | |
3718 | return (xx < yy) ? x : y; | |
3719 | } | |
3720 | else if (SCM_BIGP (y)) | |
3721 | { | |
3722 | int sgn = mpz_sgn (SCM_I_BIG_MPZ (y)); | |
3723 | scm_remember_upto_here_1 (y); | |
3724 | return (sgn < 0) ? y : x; | |
3725 | } | |
3726 | else if (SCM_REALP (y)) | |
3727 | { | |
3728 | double z = xx; | |
3729 | /* if y==NaN then "<" is false and we return NaN */ | |
3730 | return (z < SCM_REAL_VALUE (y)) ? scm_make_real (z) : y; | |
3731 | } | |
f92e85f7 MV |
3732 | else if (SCM_FRACTIONP (y)) |
3733 | { | |
e4bc5d6c | 3734 | use_less: |
73e4de09 | 3735 | return (scm_is_false (scm_less_p (x, y)) ? y : x); |
f92e85f7 | 3736 | } |
0aacf84e MD |
3737 | else |
3738 | SCM_WTA_DISPATCH_2 (g_min, x, y, SCM_ARGn, s_min); | |
f872b822 | 3739 | } |
0aacf84e MD |
3740 | else if (SCM_BIGP (x)) |
3741 | { | |
3742 | if (SCM_INUMP (y)) | |
3743 | { | |
3744 | int sgn = mpz_sgn (SCM_I_BIG_MPZ (x)); | |
3745 | scm_remember_upto_here_1 (x); | |
3746 | return (sgn < 0) ? x : y; | |
3747 | } | |
3748 | else if (SCM_BIGP (y)) | |
3749 | { | |
3750 | int cmp = mpz_cmp (SCM_I_BIG_MPZ (x), SCM_I_BIG_MPZ (y)); | |
3751 | scm_remember_upto_here_2 (x, y); | |
3752 | return (cmp > 0) ? y : x; | |
3753 | } | |
3754 | else if (SCM_REALP (y)) | |
3755 | { | |
2a06f791 KR |
3756 | /* if y==NaN then xx<yy is false, so we return the NaN y */ |
3757 | double xx, yy; | |
3758 | big_real: | |
3759 | xx = scm_i_big2dbl (x); | |
3760 | yy = SCM_REAL_VALUE (y); | |
3761 | return (xx < yy ? scm_make_real (xx) : y); | |
0aacf84e | 3762 | } |
f92e85f7 MV |
3763 | else if (SCM_FRACTIONP (y)) |
3764 | { | |
e4bc5d6c | 3765 | goto use_less; |
f92e85f7 | 3766 | } |
0aacf84e MD |
3767 | else |
3768 | SCM_WTA_DISPATCH_2 (g_min, x, y, SCM_ARGn, s_min); | |
f4c627b3 | 3769 | } |
0aacf84e MD |
3770 | else if (SCM_REALP (x)) |
3771 | { | |
3772 | if (SCM_INUMP (y)) | |
3773 | { | |
3774 | double z = SCM_INUM (y); | |
3775 | /* if x==NaN then "<" is false and we return NaN */ | |
3776 | return (z < SCM_REAL_VALUE (x)) ? scm_make_real (z) : x; | |
3777 | } | |
3778 | else if (SCM_BIGP (y)) | |
3779 | { | |
b6f8f763 | 3780 | SCM_SWAP (x, y); |
2a06f791 | 3781 | goto big_real; |
0aacf84e MD |
3782 | } |
3783 | else if (SCM_REALP (y)) | |
3784 | { | |
3785 | /* if x==NaN then our explicit check means we return NaN | |
3786 | if y==NaN then "<" is false and we return NaN | |
3787 | calling isnan is unavoidable, since it's the only way to know | |
3788 | which of x or y causes any compares to be false */ | |
3789 | double xx = SCM_REAL_VALUE (x); | |
3790 | return (xisnan (xx) || xx < SCM_REAL_VALUE (y)) ? x : y; | |
3791 | } | |
f92e85f7 MV |
3792 | else if (SCM_FRACTIONP (y)) |
3793 | { | |
3794 | double yy = scm_i_fraction2double (y); | |
3795 | double xx = SCM_REAL_VALUE (x); | |
3796 | return (yy < xx) ? scm_make_real (yy) : x; | |
3797 | } | |
0aacf84e MD |
3798 | else |
3799 | SCM_WTA_DISPATCH_2 (g_min, x, y, SCM_ARGn, s_min); | |
f872b822 | 3800 | } |
f92e85f7 MV |
3801 | else if (SCM_FRACTIONP (x)) |
3802 | { | |
3803 | if (SCM_INUMP (y)) | |
3804 | { | |
e4bc5d6c | 3805 | goto use_less; |
f92e85f7 MV |
3806 | } |
3807 | else if (SCM_BIGP (y)) | |
3808 | { | |
e4bc5d6c | 3809 | goto use_less; |
f92e85f7 MV |
3810 | } |
3811 | else if (SCM_REALP (y)) | |
3812 | { | |
3813 | double xx = scm_i_fraction2double (x); | |
3814 | return (SCM_REAL_VALUE (y) < xx) ? y : scm_make_real (xx); | |
3815 | } | |
3816 | else if (SCM_FRACTIONP (y)) | |
3817 | { | |
e4bc5d6c | 3818 | goto use_less; |
f92e85f7 MV |
3819 | } |
3820 | else | |
3821 | SCM_WTA_DISPATCH_2 (g_max, x, y, SCM_ARGn, s_max); | |
3822 | } | |
0aacf84e | 3823 | else |
f4c627b3 | 3824 | SCM_WTA_DISPATCH_2 (g_min, x, y, SCM_ARG1, s_min); |
0f2d19dd JB |
3825 | } |
3826 | ||
3827 | ||
9de33deb | 3828 | SCM_GPROC1 (s_sum, "+", scm_tc7_asubr, scm_sum, g_sum); |
942e5b91 MG |
3829 | /* "Return the sum of all parameter values. Return 0 if called without\n" |
3830 | * "any parameters." | |
3831 | */ | |
0f2d19dd | 3832 | SCM |
6e8d25a6 | 3833 | scm_sum (SCM x, SCM y) |
0f2d19dd | 3834 | { |
ca46fb90 RB |
3835 | if (SCM_UNBNDP (y)) |
3836 | { | |
3837 | if (SCM_NUMBERP (x)) return x; | |
3838 | if (SCM_UNBNDP (x)) return SCM_INUM0; | |
98cb6e75 | 3839 | SCM_WTA_DISPATCH_1 (g_sum, x, SCM_ARG1, s_sum); |
f872b822 | 3840 | } |
c209c88e | 3841 | |
ca46fb90 RB |
3842 | if (SCM_INUMP (x)) |
3843 | { | |
3844 | if (SCM_INUMP (y)) | |
3845 | { | |
3846 | long xx = SCM_INUM (x); | |
3847 | long yy = SCM_INUM (y); | |
3848 | long int z = xx + yy; | |
d956fa6f | 3849 | return SCM_FIXABLE (z) ? SCM_I_MAKINUM (z) : scm_i_long2big (z); |
ca46fb90 RB |
3850 | } |
3851 | else if (SCM_BIGP (y)) | |
3852 | { | |
3853 | SCM_SWAP (x, y); | |
3854 | goto add_big_inum; | |
3855 | } | |
3856 | else if (SCM_REALP (y)) | |
3857 | { | |
3858 | long int xx = SCM_INUM (x); | |
3859 | return scm_make_real (xx + SCM_REAL_VALUE (y)); | |
3860 | } | |
3861 | else if (SCM_COMPLEXP (y)) | |
3862 | { | |
3863 | long int xx = SCM_INUM (x); | |
3864 | return scm_make_complex (xx + SCM_COMPLEX_REAL (y), | |
3865 | SCM_COMPLEX_IMAG (y)); | |
3866 | } | |
f92e85f7 MV |
3867 | else if (SCM_FRACTIONP (y)) |
3868 | return scm_make_ratio (scm_sum (SCM_FRACTION_NUMERATOR (y), | |
3869 | scm_product (x, SCM_FRACTION_DENOMINATOR (y))), | |
3870 | SCM_FRACTION_DENOMINATOR (y)); | |
ca46fb90 RB |
3871 | else |
3872 | SCM_WTA_DISPATCH_2 (g_sum, x, y, SCM_ARGn, s_sum); | |
0aacf84e MD |
3873 | } else if (SCM_BIGP (x)) |
3874 | { | |
3875 | if (SCM_INUMP (y)) | |
3876 | { | |
3877 | long int inum; | |
3878 | int bigsgn; | |
3879 | add_big_inum: | |
3880 | inum = SCM_INUM (y); | |
3881 | if (inum == 0) | |
3882 | return x; | |
3883 | bigsgn = mpz_sgn (SCM_I_BIG_MPZ (x)); | |
3884 | if (inum < 0) | |
3885 | { | |
3886 | SCM result = scm_i_mkbig (); | |
3887 | mpz_sub_ui (SCM_I_BIG_MPZ (result), SCM_I_BIG_MPZ (x), - inum); | |
3888 | scm_remember_upto_here_1 (x); | |
3889 | /* we know the result will have to be a bignum */ | |
3890 | if (bigsgn == -1) | |
3891 | return result; | |
3892 | return scm_i_normbig (result); | |
3893 | } | |
3894 | else | |
3895 | { | |
3896 | SCM result = scm_i_mkbig (); | |
3897 | mpz_add_ui (SCM_I_BIG_MPZ (result), SCM_I_BIG_MPZ (x), inum); | |
3898 | scm_remember_upto_here_1 (x); | |
3899 | /* we know the result will have to be a bignum */ | |
3900 | if (bigsgn == 1) | |
3901 | return result; | |
3902 | return scm_i_normbig (result); | |
3903 | } | |
3904 | } | |
3905 | else if (SCM_BIGP (y)) | |
3906 | { | |
3907 | SCM result = scm_i_mkbig (); | |
3908 | int sgn_x = mpz_sgn (SCM_I_BIG_MPZ (x)); | |
3909 | int sgn_y = mpz_sgn (SCM_I_BIG_MPZ (y)); | |
3910 | mpz_add (SCM_I_BIG_MPZ (result), | |
3911 | SCM_I_BIG_MPZ (x), | |
3912 | SCM_I_BIG_MPZ (y)); | |
3913 | scm_remember_upto_here_2 (x, y); | |
3914 | /* we know the result will have to be a bignum */ | |
3915 | if (sgn_x == sgn_y) | |
3916 | return result; | |
3917 | return scm_i_normbig (result); | |
3918 | } | |
3919 | else if (SCM_REALP (y)) | |
3920 | { | |
3921 | double result = mpz_get_d (SCM_I_BIG_MPZ (x)) + SCM_REAL_VALUE (y); | |
3922 | scm_remember_upto_here_1 (x); | |
3923 | return scm_make_real (result); | |
3924 | } | |
3925 | else if (SCM_COMPLEXP (y)) | |
3926 | { | |
3927 | double real_part = (mpz_get_d (SCM_I_BIG_MPZ (x)) | |
3928 | + SCM_COMPLEX_REAL (y)); | |
3929 | scm_remember_upto_here_1 (x); | |
3930 | return scm_make_complex (real_part, SCM_COMPLEX_IMAG (y)); | |
3931 | } | |
f92e85f7 MV |
3932 | else if (SCM_FRACTIONP (y)) |
3933 | return scm_make_ratio (scm_sum (SCM_FRACTION_NUMERATOR (y), | |
3934 | scm_product (x, SCM_FRACTION_DENOMINATOR (y))), | |
3935 | SCM_FRACTION_DENOMINATOR (y)); | |
0aacf84e MD |
3936 | else |
3937 | SCM_WTA_DISPATCH_2 (g_sum, x, y, SCM_ARGn, s_sum); | |
0f2d19dd | 3938 | } |
0aacf84e MD |
3939 | else if (SCM_REALP (x)) |
3940 | { | |
3941 | if (SCM_INUMP (y)) | |
3942 | return scm_make_real (SCM_REAL_VALUE (x) + SCM_INUM (y)); | |
3943 | else if (SCM_BIGP (y)) | |
3944 | { | |
3945 | double result = mpz_get_d (SCM_I_BIG_MPZ (y)) + SCM_REAL_VALUE (x); | |
3946 | scm_remember_upto_here_1 (y); | |
3947 | return scm_make_real (result); | |
3948 | } | |
3949 | else if (SCM_REALP (y)) | |
3950 | return scm_make_real (SCM_REAL_VALUE (x) + SCM_REAL_VALUE (y)); | |
3951 | else if (SCM_COMPLEXP (y)) | |
3952 | return scm_make_complex (SCM_REAL_VALUE (x) + SCM_COMPLEX_REAL (y), | |
3953 | SCM_COMPLEX_IMAG (y)); | |
f92e85f7 MV |
3954 | else if (SCM_FRACTIONP (y)) |
3955 | return scm_make_real (SCM_REAL_VALUE (x) + scm_i_fraction2double (y)); | |
0aacf84e MD |
3956 | else |
3957 | SCM_WTA_DISPATCH_2 (g_sum, x, y, SCM_ARGn, s_sum); | |
f872b822 | 3958 | } |
0aacf84e MD |
3959 | else if (SCM_COMPLEXP (x)) |
3960 | { | |
3961 | if (SCM_INUMP (y)) | |
3962 | return scm_make_complex (SCM_COMPLEX_REAL (x) + SCM_INUM (y), | |
3963 | SCM_COMPLEX_IMAG (x)); | |
3964 | else if (SCM_BIGP (y)) | |
3965 | { | |
3966 | double real_part = (mpz_get_d (SCM_I_BIG_MPZ (y)) | |
3967 | + SCM_COMPLEX_REAL (x)); | |
3968 | scm_remember_upto_here_1 (y); | |
3969 | return scm_make_complex (real_part, SCM_COMPLEX_IMAG (x)); | |
3970 | } | |
3971 | else if (SCM_REALP (y)) | |
3972 | return scm_make_complex (SCM_COMPLEX_REAL (x) + SCM_REAL_VALUE (y), | |
3973 | SCM_COMPLEX_IMAG (x)); | |
3974 | else if (SCM_COMPLEXP (y)) | |
3975 | return scm_make_complex (SCM_COMPLEX_REAL (x) + SCM_COMPLEX_REAL (y), | |
3976 | SCM_COMPLEX_IMAG (x) + SCM_COMPLEX_IMAG (y)); | |
f92e85f7 MV |
3977 | else if (SCM_FRACTIONP (y)) |
3978 | return scm_make_complex (SCM_COMPLEX_REAL (x) + scm_i_fraction2double (y), | |
3979 | SCM_COMPLEX_IMAG (x)); | |
3980 | else | |
3981 | SCM_WTA_DISPATCH_2 (g_sum, x, y, SCM_ARGn, s_sum); | |
3982 | } | |
3983 | else if (SCM_FRACTIONP (x)) | |
3984 | { | |
3985 | if (SCM_INUMP (y)) | |
3986 | return scm_make_ratio (scm_sum (SCM_FRACTION_NUMERATOR (x), | |
3987 | scm_product (y, SCM_FRACTION_DENOMINATOR (x))), | |
3988 | SCM_FRACTION_DENOMINATOR (x)); | |
3989 | else if (SCM_BIGP (y)) | |
3990 | return scm_make_ratio (scm_sum (SCM_FRACTION_NUMERATOR (x), | |
3991 | scm_product (y, SCM_FRACTION_DENOMINATOR (x))), | |
3992 | SCM_FRACTION_DENOMINATOR (x)); | |
3993 | else if (SCM_REALP (y)) | |
3994 | return scm_make_real (SCM_REAL_VALUE (y) + scm_i_fraction2double (x)); | |
3995 | else if (SCM_COMPLEXP (y)) | |
3996 | return scm_make_complex (SCM_COMPLEX_REAL (y) + scm_i_fraction2double (x), | |
3997 | SCM_COMPLEX_IMAG (y)); | |
3998 | else if (SCM_FRACTIONP (y)) | |
3999 | /* a/b + c/d = (ad + bc) / bd */ | |
4000 | return scm_make_ratio (scm_sum (scm_product (SCM_FRACTION_NUMERATOR (x), SCM_FRACTION_DENOMINATOR (y)), | |
4001 | scm_product (SCM_FRACTION_NUMERATOR (y), SCM_FRACTION_DENOMINATOR (x))), | |
4002 | scm_product (SCM_FRACTION_DENOMINATOR (x), SCM_FRACTION_DENOMINATOR (y))); | |
0aacf84e MD |
4003 | else |
4004 | SCM_WTA_DISPATCH_2 (g_sum, x, y, SCM_ARGn, s_sum); | |
98cb6e75 | 4005 | } |
0aacf84e | 4006 | else |
98cb6e75 | 4007 | SCM_WTA_DISPATCH_2 (g_sum, x, y, SCM_ARG1, s_sum); |
0f2d19dd JB |
4008 | } |
4009 | ||
4010 | ||
9de33deb | 4011 | SCM_GPROC1 (s_difference, "-", scm_tc7_asubr, scm_difference, g_difference); |
609c3d30 MG |
4012 | /* If called with one argument @var{z1}, -@var{z1} returned. Otherwise |
4013 | * the sum of all but the first argument are subtracted from the first | |
4014 | * argument. */ | |
c05e97b7 | 4015 | #define FUNC_NAME s_difference |
0f2d19dd | 4016 | SCM |
6e8d25a6 | 4017 | scm_difference (SCM x, SCM y) |
0f2d19dd | 4018 | { |
ca46fb90 RB |
4019 | if (SCM_UNBNDP (y)) |
4020 | { | |
4021 | if (SCM_UNBNDP (x)) | |
4022 | SCM_WTA_DISPATCH_0 (g_difference, s_difference); | |
4023 | else | |
4024 | if (SCM_INUMP (x)) | |
4025 | { | |
4026 | long xx = -SCM_INUM (x); | |
4027 | if (SCM_FIXABLE (xx)) | |
d956fa6f | 4028 | return SCM_I_MAKINUM (xx); |
ca46fb90 RB |
4029 | else |
4030 | return scm_i_long2big (xx); | |
4031 | } | |
4032 | else if (SCM_BIGP (x)) | |
4033 | /* FIXME: do we really need to normalize here? */ | |
4034 | return scm_i_normbig (scm_i_clonebig (x, 0)); | |
4035 | else if (SCM_REALP (x)) | |
4036 | return scm_make_real (-SCM_REAL_VALUE (x)); | |
4037 | else if (SCM_COMPLEXP (x)) | |
4038 | return scm_make_complex (-SCM_COMPLEX_REAL (x), | |
4039 | -SCM_COMPLEX_IMAG (x)); | |
f92e85f7 MV |
4040 | else if (SCM_FRACTIONP (x)) |
4041 | return scm_make_ratio (scm_difference (SCM_FRACTION_NUMERATOR (x), SCM_UNDEFINED), | |
4042 | SCM_FRACTION_DENOMINATOR (x)); | |
ca46fb90 RB |
4043 | else |
4044 | SCM_WTA_DISPATCH_1 (g_difference, x, SCM_ARG1, s_difference); | |
f872b822 | 4045 | } |
ca46fb90 | 4046 | |
0aacf84e MD |
4047 | if (SCM_INUMP (x)) |
4048 | { | |
4049 | if (SCM_INUMP (y)) | |
4050 | { | |
4051 | long int xx = SCM_INUM (x); | |
4052 | long int yy = SCM_INUM (y); | |
4053 | long int z = xx - yy; | |
4054 | if (SCM_FIXABLE (z)) | |
d956fa6f | 4055 | return SCM_I_MAKINUM (z); |
0aacf84e MD |
4056 | else |
4057 | return scm_i_long2big (z); | |
4058 | } | |
4059 | else if (SCM_BIGP (y)) | |
4060 | { | |
4061 | /* inum-x - big-y */ | |
4062 | long xx = SCM_INUM (x); | |
ca46fb90 | 4063 | |
0aacf84e MD |
4064 | if (xx == 0) |
4065 | return scm_i_clonebig (y, 0); | |
4066 | else | |
4067 | { | |
4068 | int sgn_y = mpz_sgn (SCM_I_BIG_MPZ (y)); | |
4069 | SCM result = scm_i_mkbig (); | |
ca46fb90 | 4070 | |
0aacf84e MD |
4071 | if (xx >= 0) |
4072 | mpz_ui_sub (SCM_I_BIG_MPZ (result), xx, SCM_I_BIG_MPZ (y)); | |
4073 | else | |
4074 | { | |
4075 | /* x - y == -(y + -x) */ | |
4076 | mpz_add_ui (SCM_I_BIG_MPZ (result), SCM_I_BIG_MPZ (y), -xx); | |
4077 | mpz_neg (SCM_I_BIG_MPZ (result), SCM_I_BIG_MPZ (result)); | |
4078 | } | |
4079 | scm_remember_upto_here_1 (y); | |
ca46fb90 | 4080 | |
0aacf84e MD |
4081 | if ((xx < 0 && (sgn_y > 0)) || ((xx > 0) && sgn_y < 0)) |
4082 | /* we know the result will have to be a bignum */ | |
4083 | return result; | |
4084 | else | |
4085 | return scm_i_normbig (result); | |
4086 | } | |
4087 | } | |
4088 | else if (SCM_REALP (y)) | |
4089 | { | |
4090 | long int xx = SCM_INUM (x); | |
4091 | return scm_make_real (xx - SCM_REAL_VALUE (y)); | |
4092 | } | |
4093 | else if (SCM_COMPLEXP (y)) | |
4094 | { | |
4095 | long int xx = SCM_INUM (x); | |
4096 | return scm_make_complex (xx - SCM_COMPLEX_REAL (y), | |
4097 | - SCM_COMPLEX_IMAG (y)); | |
4098 | } | |
f92e85f7 MV |
4099 | else if (SCM_FRACTIONP (y)) |
4100 | /* a - b/c = (ac - b) / c */ | |
4101 | return scm_make_ratio (scm_difference (scm_product (x, SCM_FRACTION_DENOMINATOR (y)), | |
4102 | SCM_FRACTION_NUMERATOR (y)), | |
4103 | SCM_FRACTION_DENOMINATOR (y)); | |
0aacf84e MD |
4104 | else |
4105 | SCM_WTA_DISPATCH_2 (g_difference, x, y, SCM_ARGn, s_difference); | |
f872b822 | 4106 | } |
0aacf84e MD |
4107 | else if (SCM_BIGP (x)) |
4108 | { | |
4109 | if (SCM_INUMP (y)) | |
4110 | { | |
4111 | /* big-x - inum-y */ | |
4112 | long yy = SCM_INUM (y); | |
4113 | int sgn_x = mpz_sgn (SCM_I_BIG_MPZ (x)); | |
ca46fb90 | 4114 | |
0aacf84e MD |
4115 | scm_remember_upto_here_1 (x); |
4116 | if (sgn_x == 0) | |
d956fa6f | 4117 | return SCM_FIXABLE (-yy) ? SCM_I_MAKINUM (-yy) : scm_long2num (-yy); |
0aacf84e MD |
4118 | else |
4119 | { | |
4120 | SCM result = scm_i_mkbig (); | |
ca46fb90 | 4121 | |
708f22c6 KR |
4122 | if (yy >= 0) |
4123 | mpz_sub_ui (SCM_I_BIG_MPZ (result), SCM_I_BIG_MPZ (x), yy); | |
4124 | else | |
4125 | mpz_add_ui (SCM_I_BIG_MPZ (result), SCM_I_BIG_MPZ (x), -yy); | |
0aacf84e | 4126 | scm_remember_upto_here_1 (x); |
ca46fb90 | 4127 | |
0aacf84e MD |
4128 | if ((sgn_x < 0 && (yy > 0)) || ((sgn_x > 0) && yy < 0)) |
4129 | /* we know the result will have to be a bignum */ | |
4130 | return result; | |
4131 | else | |
4132 | return scm_i_normbig (result); | |
4133 | } | |
4134 | } | |
4135 | else if (SCM_BIGP (y)) | |
4136 | { | |
4137 | int sgn_x = mpz_sgn (SCM_I_BIG_MPZ (x)); | |
4138 | int sgn_y = mpz_sgn (SCM_I_BIG_MPZ (y)); | |
4139 | SCM result = scm_i_mkbig (); | |
4140 | mpz_sub (SCM_I_BIG_MPZ (result), | |
4141 | SCM_I_BIG_MPZ (x), | |
4142 | SCM_I_BIG_MPZ (y)); | |
4143 | scm_remember_upto_here_2 (x, y); | |
4144 | /* we know the result will have to be a bignum */ | |
4145 | if ((sgn_x == 1) && (sgn_y == -1)) | |
4146 | return result; | |
4147 | if ((sgn_x == -1) && (sgn_y == 1)) | |
4148 | return result; | |
4149 | return scm_i_normbig (result); | |
4150 | } | |
4151 | else if (SCM_REALP (y)) | |
4152 | { | |
4153 | double result = mpz_get_d (SCM_I_BIG_MPZ (x)) - SCM_REAL_VALUE (y); | |
4154 | scm_remember_upto_here_1 (x); | |
4155 | return scm_make_real (result); | |
4156 | } | |
4157 | else if (SCM_COMPLEXP (y)) | |
4158 | { | |
4159 | double real_part = (mpz_get_d (SCM_I_BIG_MPZ (x)) | |
4160 | - SCM_COMPLEX_REAL (y)); | |
4161 | scm_remember_upto_here_1 (x); | |
4162 | return scm_make_complex (real_part, - SCM_COMPLEX_IMAG (y)); | |
4163 | } | |
f92e85f7 MV |
4164 | else if (SCM_FRACTIONP (y)) |
4165 | return scm_make_ratio (scm_difference (scm_product (x, SCM_FRACTION_DENOMINATOR (y)), | |
4166 | SCM_FRACTION_NUMERATOR (y)), | |
4167 | SCM_FRACTION_DENOMINATOR (y)); | |
0aacf84e | 4168 | else SCM_WTA_DISPATCH_2 (g_difference, x, y, SCM_ARGn, s_difference); |
ca46fb90 | 4169 | } |
0aacf84e MD |
4170 | else if (SCM_REALP (x)) |
4171 | { | |
4172 | if (SCM_INUMP (y)) | |
4173 | return scm_make_real (SCM_REAL_VALUE (x) - SCM_INUM (y)); | |
4174 | else if (SCM_BIGP (y)) | |
4175 | { | |
4176 | double result = SCM_REAL_VALUE (x) - mpz_get_d (SCM_I_BIG_MPZ (y)); | |
4177 | scm_remember_upto_here_1 (x); | |
4178 | return scm_make_real (result); | |
4179 | } | |
4180 | else if (SCM_REALP (y)) | |
4181 | return scm_make_real (SCM_REAL_VALUE (x) - SCM_REAL_VALUE (y)); | |
4182 | else if (SCM_COMPLEXP (y)) | |
4183 | return scm_make_complex (SCM_REAL_VALUE (x) - SCM_COMPLEX_REAL (y), | |
4184 | -SCM_COMPLEX_IMAG (y)); | |
f92e85f7 MV |
4185 | else if (SCM_FRACTIONP (y)) |
4186 | return scm_make_real (SCM_REAL_VALUE (x) - scm_i_fraction2double (y)); | |
0aacf84e MD |
4187 | else |
4188 | SCM_WTA_DISPATCH_2 (g_difference, x, y, SCM_ARGn, s_difference); | |
98cb6e75 | 4189 | } |
0aacf84e MD |
4190 | else if (SCM_COMPLEXP (x)) |
4191 | { | |
4192 | if (SCM_INUMP (y)) | |
4193 | return scm_make_complex (SCM_COMPLEX_REAL (x) - SCM_INUM (y), | |
4194 | SCM_COMPLEX_IMAG (x)); | |
4195 | else if (SCM_BIGP (y)) | |
4196 | { | |
4197 | double real_part = (SCM_COMPLEX_REAL (x) | |
4198 | - mpz_get_d (SCM_I_BIG_MPZ (y))); | |
4199 | scm_remember_upto_here_1 (x); | |
4200 | return scm_make_complex (real_part, SCM_COMPLEX_IMAG (y)); | |
4201 | } | |
4202 | else if (SCM_REALP (y)) | |
4203 | return scm_make_complex (SCM_COMPLEX_REAL (x) - SCM_REAL_VALUE (y), | |
4204 | SCM_COMPLEX_IMAG (x)); | |
4205 | else if (SCM_COMPLEXP (y)) | |
4206 | return scm_make_complex (SCM_COMPLEX_REAL (x) - SCM_COMPLEX_REAL (y), | |
4207 | SCM_COMPLEX_IMAG (x) - SCM_COMPLEX_IMAG (y)); | |
f92e85f7 MV |
4208 | else if (SCM_FRACTIONP (y)) |
4209 | return scm_make_complex (SCM_COMPLEX_REAL (x) - scm_i_fraction2double (y), | |
4210 | SCM_COMPLEX_IMAG (x)); | |
4211 | else | |
4212 | SCM_WTA_DISPATCH_2 (g_difference, x, y, SCM_ARGn, s_difference); | |
4213 | } | |
4214 | else if (SCM_FRACTIONP (x)) | |
4215 | { | |
4216 | if (SCM_INUMP (y)) | |
4217 | /* a/b - c = (a - cb) / b */ | |
4218 | return scm_make_ratio (scm_difference (SCM_FRACTION_NUMERATOR (x), | |
4219 | scm_product(y, SCM_FRACTION_DENOMINATOR (x))), | |
4220 | SCM_FRACTION_DENOMINATOR (x)); | |
4221 | else if (SCM_BIGP (y)) | |
4222 | return scm_make_ratio (scm_difference (SCM_FRACTION_NUMERATOR (x), | |
4223 | scm_product(y, SCM_FRACTION_DENOMINATOR (x))), | |
4224 | SCM_FRACTION_DENOMINATOR (x)); | |
4225 | else if (SCM_REALP (y)) | |
4226 | return scm_make_real (scm_i_fraction2double (x) - SCM_REAL_VALUE (y)); | |
4227 | else if (SCM_COMPLEXP (y)) | |
4228 | return scm_make_complex (scm_i_fraction2double (x) - SCM_COMPLEX_REAL (y), | |
4229 | -SCM_COMPLEX_IMAG (y)); | |
4230 | else if (SCM_FRACTIONP (y)) | |
4231 | /* a/b - c/d = (ad - bc) / bd */ | |
4232 | return scm_make_ratio (scm_difference (scm_product (SCM_FRACTION_NUMERATOR (x), SCM_FRACTION_DENOMINATOR (y)), | |
4233 | scm_product (SCM_FRACTION_NUMERATOR (y), SCM_FRACTION_DENOMINATOR (x))), | |
4234 | scm_product (SCM_FRACTION_DENOMINATOR (x), SCM_FRACTION_DENOMINATOR (y))); | |
0aacf84e MD |
4235 | else |
4236 | SCM_WTA_DISPATCH_2 (g_difference, x, y, SCM_ARGn, s_difference); | |
98cb6e75 | 4237 | } |
0aacf84e | 4238 | else |
98cb6e75 | 4239 | SCM_WTA_DISPATCH_2 (g_difference, x, y, SCM_ARG1, s_difference); |
0f2d19dd | 4240 | } |
c05e97b7 | 4241 | #undef FUNC_NAME |
0f2d19dd | 4242 | |
ca46fb90 | 4243 | |
9de33deb | 4244 | SCM_GPROC1 (s_product, "*", scm_tc7_asubr, scm_product, g_product); |
942e5b91 MG |
4245 | /* "Return the product of all arguments. If called without arguments,\n" |
4246 | * "1 is returned." | |
4247 | */ | |
0f2d19dd | 4248 | SCM |
6e8d25a6 | 4249 | scm_product (SCM x, SCM y) |
0f2d19dd | 4250 | { |
0aacf84e MD |
4251 | if (SCM_UNBNDP (y)) |
4252 | { | |
4253 | if (SCM_UNBNDP (x)) | |
d956fa6f | 4254 | return SCM_I_MAKINUM (1L); |
0aacf84e MD |
4255 | else if (SCM_NUMBERP (x)) |
4256 | return x; | |
4257 | else | |
4258 | SCM_WTA_DISPATCH_1 (g_product, x, SCM_ARG1, s_product); | |
f872b822 | 4259 | } |
ca46fb90 | 4260 | |
0aacf84e MD |
4261 | if (SCM_INUMP (x)) |
4262 | { | |
4263 | long xx; | |
f4c627b3 | 4264 | |
0aacf84e MD |
4265 | intbig: |
4266 | xx = SCM_INUM (x); | |
f4c627b3 | 4267 | |
0aacf84e MD |
4268 | switch (xx) |
4269 | { | |
ca46fb90 RB |
4270 | case 0: return x; break; |
4271 | case 1: return y; break; | |
0aacf84e | 4272 | } |
f4c627b3 | 4273 | |
0aacf84e MD |
4274 | if (SCM_INUMP (y)) |
4275 | { | |
4276 | long yy = SCM_INUM (y); | |
4277 | long kk = xx * yy; | |
d956fa6f | 4278 | SCM k = SCM_I_MAKINUM (kk); |
0aacf84e MD |
4279 | if ((kk == SCM_INUM (k)) && (kk / xx == yy)) |
4280 | return k; | |
4281 | else | |
4282 | { | |
4283 | SCM result = scm_i_long2big (xx); | |
4284 | mpz_mul_si (SCM_I_BIG_MPZ (result), SCM_I_BIG_MPZ (result), yy); | |
4285 | return scm_i_normbig (result); | |
4286 | } | |
4287 | } | |
4288 | else if (SCM_BIGP (y)) | |
4289 | { | |
4290 | SCM result = scm_i_mkbig (); | |
4291 | mpz_mul_si (SCM_I_BIG_MPZ (result), SCM_I_BIG_MPZ (y), xx); | |
4292 | scm_remember_upto_here_1 (y); | |
4293 | return result; | |
4294 | } | |
4295 | else if (SCM_REALP (y)) | |
4296 | return scm_make_real (xx * SCM_REAL_VALUE (y)); | |
4297 | else if (SCM_COMPLEXP (y)) | |
4298 | return scm_make_complex (xx * SCM_COMPLEX_REAL (y), | |
4299 | xx * SCM_COMPLEX_IMAG (y)); | |
f92e85f7 MV |
4300 | else if (SCM_FRACTIONP (y)) |
4301 | return scm_make_ratio (scm_product (x, SCM_FRACTION_NUMERATOR (y)), | |
4302 | SCM_FRACTION_DENOMINATOR (y)); | |
0aacf84e MD |
4303 | else |
4304 | SCM_WTA_DISPATCH_2 (g_product, x, y, SCM_ARGn, s_product); | |
f4c627b3 | 4305 | } |
0aacf84e MD |
4306 | else if (SCM_BIGP (x)) |
4307 | { | |
4308 | if (SCM_INUMP (y)) | |
4309 | { | |
4310 | SCM_SWAP (x, y); | |
4311 | goto intbig; | |
4312 | } | |
4313 | else if (SCM_BIGP (y)) | |
4314 | { | |
4315 | SCM result = scm_i_mkbig (); | |
4316 | mpz_mul (SCM_I_BIG_MPZ (result), | |
4317 | SCM_I_BIG_MPZ (x), | |
4318 | SCM_I_BIG_MPZ (y)); | |
4319 | scm_remember_upto_here_2 (x, y); | |
4320 | return result; | |
4321 | } | |
4322 | else if (SCM_REALP (y)) | |
4323 | { | |
4324 | double result = mpz_get_d (SCM_I_BIG_MPZ (x)) * SCM_REAL_VALUE (y); | |
4325 | scm_remember_upto_here_1 (x); | |
4326 | return scm_make_real (result); | |
4327 | } | |
4328 | else if (SCM_COMPLEXP (y)) | |
4329 | { | |
4330 | double z = mpz_get_d (SCM_I_BIG_MPZ (x)); | |
4331 | scm_remember_upto_here_1 (x); | |
4332 | return scm_make_complex (z * SCM_COMPLEX_REAL (y), | |
4333 | z * SCM_COMPLEX_IMAG (y)); | |
4334 | } | |
f92e85f7 MV |
4335 | else if (SCM_FRACTIONP (y)) |
4336 | return scm_make_ratio (scm_product (x, SCM_FRACTION_NUMERATOR (y)), | |
4337 | SCM_FRACTION_DENOMINATOR (y)); | |
0aacf84e MD |
4338 | else |
4339 | SCM_WTA_DISPATCH_2 (g_product, x, y, SCM_ARGn, s_product); | |
f4c627b3 | 4340 | } |
0aacf84e MD |
4341 | else if (SCM_REALP (x)) |
4342 | { | |
4343 | if (SCM_INUMP (y)) | |
4344 | return scm_make_real (SCM_INUM (y) * SCM_REAL_VALUE (x)); | |
4345 | else if (SCM_BIGP (y)) | |
4346 | { | |
4347 | double result = mpz_get_d (SCM_I_BIG_MPZ (y)) * SCM_REAL_VALUE (x); | |
4348 | scm_remember_upto_here_1 (y); | |
4349 | return scm_make_real (result); | |
4350 | } | |
4351 | else if (SCM_REALP (y)) | |
4352 | return scm_make_real (SCM_REAL_VALUE (x) * SCM_REAL_VALUE (y)); | |
4353 | else if (SCM_COMPLEXP (y)) | |
4354 | return scm_make_complex (SCM_REAL_VALUE (x) * SCM_COMPLEX_REAL (y), | |
4355 | SCM_REAL_VALUE (x) * SCM_COMPLEX_IMAG (y)); | |
f92e85f7 MV |
4356 | else if (SCM_FRACTIONP (y)) |
4357 | return scm_make_real (SCM_REAL_VALUE (x) * scm_i_fraction2double (y)); | |
0aacf84e MD |
4358 | else |
4359 | SCM_WTA_DISPATCH_2 (g_product, x, y, SCM_ARGn, s_product); | |
f4c627b3 | 4360 | } |
0aacf84e MD |
4361 | else if (SCM_COMPLEXP (x)) |
4362 | { | |
4363 | if (SCM_INUMP (y)) | |
4364 | return scm_make_complex (SCM_INUM (y) * SCM_COMPLEX_REAL (x), | |
4365 | SCM_INUM (y) * SCM_COMPLEX_IMAG (x)); | |
4366 | else if (SCM_BIGP (y)) | |
4367 | { | |
4368 | double z = mpz_get_d (SCM_I_BIG_MPZ (y)); | |
4369 | scm_remember_upto_here_1 (y); | |
76506335 KR |
4370 | return scm_make_complex (z * SCM_COMPLEX_REAL (x), |
4371 | z * SCM_COMPLEX_IMAG (x)); | |
0aacf84e MD |
4372 | } |
4373 | else if (SCM_REALP (y)) | |
4374 | return scm_make_complex (SCM_REAL_VALUE (y) * SCM_COMPLEX_REAL (x), | |
4375 | SCM_REAL_VALUE (y) * SCM_COMPLEX_IMAG (x)); | |
4376 | else if (SCM_COMPLEXP (y)) | |
4377 | { | |
4378 | return scm_make_complex (SCM_COMPLEX_REAL (x) * SCM_COMPLEX_REAL (y) | |
4379 | - SCM_COMPLEX_IMAG (x) * SCM_COMPLEX_IMAG (y), | |
4380 | SCM_COMPLEX_REAL (x) * SCM_COMPLEX_IMAG (y) | |
4381 | + SCM_COMPLEX_IMAG (x) * SCM_COMPLEX_REAL (y)); | |
4382 | } | |
f92e85f7 MV |
4383 | else if (SCM_FRACTIONP (y)) |
4384 | { | |
4385 | double yy = scm_i_fraction2double (y); | |
4386 | return scm_make_complex (yy * SCM_COMPLEX_REAL (x), | |
4387 | yy * SCM_COMPLEX_IMAG (x)); | |
4388 | } | |
4389 | else | |
4390 | SCM_WTA_DISPATCH_2 (g_product, x, y, SCM_ARGn, s_product); | |
4391 | } | |
4392 | else if (SCM_FRACTIONP (x)) | |
4393 | { | |
4394 | if (SCM_INUMP (y)) | |
4395 | return scm_make_ratio (scm_product (y, SCM_FRACTION_NUMERATOR (x)), | |
4396 | SCM_FRACTION_DENOMINATOR (x)); | |
4397 | else if (SCM_BIGP (y)) | |
4398 | return scm_make_ratio (scm_product (y, SCM_FRACTION_NUMERATOR (x)), | |
4399 | SCM_FRACTION_DENOMINATOR (x)); | |
4400 | else if (SCM_REALP (y)) | |
4401 | return scm_make_real (scm_i_fraction2double (x) * SCM_REAL_VALUE (y)); | |
4402 | else if (SCM_COMPLEXP (y)) | |
4403 | { | |
4404 | double xx = scm_i_fraction2double (x); | |
4405 | return scm_make_complex (xx * SCM_COMPLEX_REAL (y), | |
4406 | xx * SCM_COMPLEX_IMAG (y)); | |
4407 | } | |
4408 | else if (SCM_FRACTIONP (y)) | |
4409 | /* a/b * c/d = ac / bd */ | |
4410 | return scm_make_ratio (scm_product (SCM_FRACTION_NUMERATOR (x), | |
4411 | SCM_FRACTION_NUMERATOR (y)), | |
4412 | scm_product (SCM_FRACTION_DENOMINATOR (x), | |
4413 | SCM_FRACTION_DENOMINATOR (y))); | |
0aacf84e MD |
4414 | else |
4415 | SCM_WTA_DISPATCH_2 (g_product, x, y, SCM_ARGn, s_product); | |
f4c627b3 | 4416 | } |
0aacf84e | 4417 | else |
f4c627b3 | 4418 | SCM_WTA_DISPATCH_2 (g_product, x, y, SCM_ARG1, s_product); |
0f2d19dd JB |
4419 | } |
4420 | ||
0f2d19dd | 4421 | double |
6e8d25a6 | 4422 | scm_num2dbl (SCM a, const char *why) |
f4c627b3 | 4423 | #define FUNC_NAME why |
0f2d19dd | 4424 | { |
0aacf84e | 4425 | if (SCM_INUMP (a)) |
0f2d19dd | 4426 | return (double) SCM_INUM (a); |
0aacf84e MD |
4427 | else if (SCM_BIGP (a)) |
4428 | { | |
4429 | double result = mpz_get_d (SCM_I_BIG_MPZ (a)); | |
4430 | scm_remember_upto_here_1 (a); | |
4431 | return result; | |
4432 | } | |
4433 | else if (SCM_REALP (a)) | |
f4c627b3 | 4434 | return (SCM_REAL_VALUE (a)); |
f92e85f7 MV |
4435 | else if (SCM_FRACTIONP (a)) |
4436 | return scm_i_fraction2double (a); | |
0aacf84e | 4437 | else |
f4c627b3 | 4438 | SCM_WRONG_TYPE_ARG (SCM_ARGn, a); |
0f2d19dd | 4439 | } |
f4c627b3 | 4440 | #undef FUNC_NAME |
0f2d19dd | 4441 | |
7351e207 MV |
4442 | #if ((defined (HAVE_ISINF) && defined (HAVE_ISNAN)) \ |
4443 | || (defined (HAVE_FINITE) && defined (HAVE_ISNAN))) | |
4444 | #define ALLOW_DIVIDE_BY_ZERO | |
4445 | /* #define ALLOW_DIVIDE_BY_EXACT_ZERO */ | |
4446 | #endif | |
0f2d19dd | 4447 | |
ba74ef4e MV |
4448 | /* The code below for complex division is adapted from the GNU |
4449 | libstdc++, which adapted it from f2c's libF77, and is subject to | |
4450 | this copyright: */ | |
4451 | ||
4452 | /**************************************************************** | |
4453 | Copyright 1990, 1991, 1992, 1993 by AT&T Bell Laboratories and Bellcore. | |
4454 | ||
4455 | Permission to use, copy, modify, and distribute this software | |
4456 | and its documentation for any purpose and without fee is hereby | |
4457 | granted, provided that the above copyright notice appear in all | |
4458 | copies and that both that the copyright notice and this | |
4459 | permission notice and warranty disclaimer appear in supporting | |
4460 | documentation, and that the names of AT&T Bell Laboratories or | |
4461 | Bellcore or any of their entities not be used in advertising or | |
4462 | publicity pertaining to distribution of the software without | |
4463 | specific, written prior permission. | |
4464 | ||
4465 | AT&T and Bellcore disclaim all warranties with regard to this | |
4466 | software, including all implied warranties of merchantability | |
4467 | and fitness. In no event shall AT&T or Bellcore be liable for | |
4468 | any special, indirect or consequential damages or any damages | |
4469 | whatsoever resulting from loss of use, data or profits, whether | |
4470 | in an action of contract, negligence or other tortious action, | |
4471 | arising out of or in connection with the use or performance of | |
4472 | this software. | |
4473 | ****************************************************************/ | |
4474 | ||
9de33deb | 4475 | SCM_GPROC1 (s_divide, "/", scm_tc7_asubr, scm_divide, g_divide); |
609c3d30 MG |
4476 | /* Divide the first argument by the product of the remaining |
4477 | arguments. If called with one argument @var{z1}, 1/@var{z1} is | |
4478 | returned. */ | |
c05e97b7 | 4479 | #define FUNC_NAME s_divide |
f92e85f7 MV |
4480 | static SCM |
4481 | scm_i_divide (SCM x, SCM y, int inexact) | |
0f2d19dd | 4482 | { |
f8de44c1 DH |
4483 | double a; |
4484 | ||
0aacf84e MD |
4485 | if (SCM_UNBNDP (y)) |
4486 | { | |
4487 | if (SCM_UNBNDP (x)) | |
4488 | SCM_WTA_DISPATCH_0 (g_divide, s_divide); | |
4489 | else if (SCM_INUMP (x)) | |
4490 | { | |
4491 | long xx = SCM_INUM (x); | |
4492 | if (xx == 1 || xx == -1) | |
4493 | return x; | |
7351e207 | 4494 | #ifndef ALLOW_DIVIDE_BY_EXACT_ZERO |
0aacf84e MD |
4495 | else if (xx == 0) |
4496 | scm_num_overflow (s_divide); | |
7351e207 | 4497 | #endif |
0aacf84e | 4498 | else |
f92e85f7 MV |
4499 | { |
4500 | if (inexact) | |
4501 | return scm_make_real (1.0 / (double) xx); | |
d956fa6f | 4502 | else return scm_make_ratio (SCM_I_MAKINUM(1), x); |
f92e85f7 | 4503 | } |
0aacf84e MD |
4504 | } |
4505 | else if (SCM_BIGP (x)) | |
f92e85f7 MV |
4506 | { |
4507 | if (inexact) | |
4508 | return scm_make_real (1.0 / scm_i_big2dbl (x)); | |
d956fa6f | 4509 | else return scm_make_ratio (SCM_I_MAKINUM(1), x); |
f92e85f7 | 4510 | } |
0aacf84e MD |
4511 | else if (SCM_REALP (x)) |
4512 | { | |
4513 | double xx = SCM_REAL_VALUE (x); | |
7351e207 | 4514 | #ifndef ALLOW_DIVIDE_BY_ZERO |
0aacf84e MD |
4515 | if (xx == 0.0) |
4516 | scm_num_overflow (s_divide); | |
4517 | else | |
7351e207 | 4518 | #endif |
0aacf84e MD |
4519 | return scm_make_real (1.0 / xx); |
4520 | } | |
4521 | else if (SCM_COMPLEXP (x)) | |
4522 | { | |
4523 | double r = SCM_COMPLEX_REAL (x); | |
4524 | double i = SCM_COMPLEX_IMAG (x); | |
4525 | if (r <= i) | |
4526 | { | |
4527 | double t = r / i; | |
4528 | double d = i * (1.0 + t * t); | |
4529 | return scm_make_complex (t / d, -1.0 / d); | |
4530 | } | |
4531 | else | |
4532 | { | |
4533 | double t = i / r; | |
4534 | double d = r * (1.0 + t * t); | |
4535 | return scm_make_complex (1.0 / d, -t / d); | |
4536 | } | |
4537 | } | |
f92e85f7 MV |
4538 | else if (SCM_FRACTIONP (x)) |
4539 | return scm_make_ratio (SCM_FRACTION_DENOMINATOR (x), | |
4540 | SCM_FRACTION_NUMERATOR (x)); | |
0aacf84e MD |
4541 | else |
4542 | SCM_WTA_DISPATCH_1 (g_divide, x, SCM_ARG1, s_divide); | |
f8de44c1 | 4543 | } |
f8de44c1 | 4544 | |
0aacf84e MD |
4545 | if (SCM_INUMP (x)) |
4546 | { | |
4547 | long xx = SCM_INUM (x); | |
4548 | if (SCM_INUMP (y)) | |
4549 | { | |
4550 | long yy = SCM_INUM (y); | |
4551 | if (yy == 0) | |
4552 | { | |
7351e207 | 4553 | #ifndef ALLOW_DIVIDE_BY_EXACT_ZERO |
0aacf84e | 4554 | scm_num_overflow (s_divide); |
7351e207 | 4555 | #else |
0aacf84e | 4556 | return scm_make_real ((double) xx / (double) yy); |
7351e207 | 4557 | #endif |
0aacf84e MD |
4558 | } |
4559 | else if (xx % yy != 0) | |
f92e85f7 MV |
4560 | { |
4561 | if (inexact) | |
4562 | return scm_make_real ((double) xx / (double) yy); | |
4563 | else return scm_make_ratio (x, y); | |
4564 | } | |
0aacf84e MD |
4565 | else |
4566 | { | |
4567 | long z = xx / yy; | |
4568 | if (SCM_FIXABLE (z)) | |
d956fa6f | 4569 | return SCM_I_MAKINUM (z); |
0aacf84e MD |
4570 | else |
4571 | return scm_i_long2big (z); | |
4572 | } | |
f872b822 | 4573 | } |
0aacf84e | 4574 | else if (SCM_BIGP (y)) |
f92e85f7 MV |
4575 | { |
4576 | if (inexact) | |
4577 | return scm_make_real ((double) xx / scm_i_big2dbl (y)); | |
4578 | else return scm_make_ratio (x, y); | |
4579 | } | |
0aacf84e MD |
4580 | else if (SCM_REALP (y)) |
4581 | { | |
4582 | double yy = SCM_REAL_VALUE (y); | |
7351e207 | 4583 | #ifndef ALLOW_DIVIDE_BY_ZERO |
0aacf84e MD |
4584 | if (yy == 0.0) |
4585 | scm_num_overflow (s_divide); | |
4586 | else | |
7351e207 | 4587 | #endif |
0aacf84e | 4588 | return scm_make_real ((double) xx / yy); |
ba74ef4e | 4589 | } |
0aacf84e MD |
4590 | else if (SCM_COMPLEXP (y)) |
4591 | { | |
4592 | a = xx; | |
4593 | complex_div: /* y _must_ be a complex number */ | |
4594 | { | |
4595 | double r = SCM_COMPLEX_REAL (y); | |
4596 | double i = SCM_COMPLEX_IMAG (y); | |
4597 | if (r <= i) | |
4598 | { | |
4599 | double t = r / i; | |
4600 | double d = i * (1.0 + t * t); | |
4601 | return scm_make_complex ((a * t) / d, -a / d); | |
4602 | } | |
4603 | else | |
4604 | { | |
4605 | double t = i / r; | |
4606 | double d = r * (1.0 + t * t); | |
4607 | return scm_make_complex (a / d, -(a * t) / d); | |
4608 | } | |
4609 | } | |
4610 | } | |
f92e85f7 MV |
4611 | else if (SCM_FRACTIONP (y)) |
4612 | /* a / b/c = ac / b */ | |
4613 | return scm_make_ratio (scm_product (x, SCM_FRACTION_DENOMINATOR (y)), | |
4614 | SCM_FRACTION_NUMERATOR (y)); | |
0aacf84e MD |
4615 | else |
4616 | SCM_WTA_DISPATCH_2 (g_divide, x, y, SCM_ARGn, s_divide); | |
f8de44c1 | 4617 | } |
0aacf84e MD |
4618 | else if (SCM_BIGP (x)) |
4619 | { | |
4620 | if (SCM_INUMP (y)) | |
4621 | { | |
4622 | long int yy = SCM_INUM (y); | |
4623 | if (yy == 0) | |
4624 | { | |
7351e207 | 4625 | #ifndef ALLOW_DIVIDE_BY_EXACT_ZERO |
0aacf84e | 4626 | scm_num_overflow (s_divide); |
7351e207 | 4627 | #else |
0aacf84e MD |
4628 | int sgn = mpz_sgn (SCM_I_BIG_MPZ (x)); |
4629 | scm_remember_upto_here_1 (x); | |
4630 | return (sgn == 0) ? scm_nan () : scm_inf (); | |
7351e207 | 4631 | #endif |
0aacf84e MD |
4632 | } |
4633 | else if (yy == 1) | |
4634 | return x; | |
4635 | else | |
4636 | { | |
4637 | /* FIXME: HMM, what are the relative performance issues here? | |
4638 | We need to test. Is it faster on average to test | |
4639 | divisible_p, then perform whichever operation, or is it | |
4640 | faster to perform the integer div opportunistically and | |
4641 | switch to real if there's a remainder? For now we take the | |
4642 | middle ground: test, then if divisible, use the faster div | |
4643 | func. */ | |
4644 | ||
4645 | long abs_yy = yy < 0 ? -yy : yy; | |
4646 | int divisible_p = mpz_divisible_ui_p (SCM_I_BIG_MPZ (x), abs_yy); | |
4647 | ||
4648 | if (divisible_p) | |
4649 | { | |
4650 | SCM result = scm_i_mkbig (); | |
4651 | mpz_divexact_ui (SCM_I_BIG_MPZ (result), SCM_I_BIG_MPZ (x), abs_yy); | |
4652 | scm_remember_upto_here_1 (x); | |
4653 | if (yy < 0) | |
4654 | mpz_neg (SCM_I_BIG_MPZ (result), SCM_I_BIG_MPZ (result)); | |
4655 | return scm_i_normbig (result); | |
4656 | } | |
4657 | else | |
f92e85f7 MV |
4658 | { |
4659 | if (inexact) | |
4660 | return scm_make_real (scm_i_big2dbl (x) / (double) yy); | |
4661 | else return scm_make_ratio (x, y); | |
4662 | } | |
0aacf84e MD |
4663 | } |
4664 | } | |
4665 | else if (SCM_BIGP (y)) | |
4666 | { | |
4667 | int y_is_zero = (mpz_sgn (SCM_I_BIG_MPZ (y)) == 0); | |
4668 | if (y_is_zero) | |
4669 | { | |
ca46fb90 | 4670 | #ifndef ALLOW_DIVIDE_BY_EXACT_ZERO |
0aacf84e | 4671 | scm_num_overflow (s_divide); |
f872b822 | 4672 | #else |
0aacf84e MD |
4673 | int sgn = mpz_sgn (SCM_I_BIG_MPZ (x)); |
4674 | scm_remember_upto_here_1 (x); | |
4675 | return (sgn == 0) ? scm_nan () : scm_inf (); | |
f872b822 | 4676 | #endif |
0aacf84e MD |
4677 | } |
4678 | else | |
4679 | { | |
4680 | /* big_x / big_y */ | |
4681 | int divisible_p = mpz_divisible_p (SCM_I_BIG_MPZ (x), | |
4682 | SCM_I_BIG_MPZ (y)); | |
4683 | if (divisible_p) | |
4684 | { | |
4685 | SCM result = scm_i_mkbig (); | |
4686 | mpz_divexact (SCM_I_BIG_MPZ (result), | |
4687 | SCM_I_BIG_MPZ (x), | |
4688 | SCM_I_BIG_MPZ (y)); | |
4689 | scm_remember_upto_here_2 (x, y); | |
4690 | return scm_i_normbig (result); | |
4691 | } | |
4692 | else | |
4693 | { | |
f92e85f7 MV |
4694 | if (inexact) |
4695 | { | |
4696 | double dbx = mpz_get_d (SCM_I_BIG_MPZ (x)); | |
4697 | double dby = mpz_get_d (SCM_I_BIG_MPZ (y)); | |
4698 | scm_remember_upto_here_2 (x, y); | |
4699 | return scm_make_real (dbx / dby); | |
4700 | } | |
4701 | else return scm_make_ratio (x, y); | |
0aacf84e MD |
4702 | } |
4703 | } | |
4704 | } | |
4705 | else if (SCM_REALP (y)) | |
4706 | { | |
4707 | double yy = SCM_REAL_VALUE (y); | |
7351e207 | 4708 | #ifndef ALLOW_DIVIDE_BY_ZERO |
0aacf84e MD |
4709 | if (yy == 0.0) |
4710 | scm_num_overflow (s_divide); | |
4711 | else | |
7351e207 | 4712 | #endif |
0aacf84e MD |
4713 | return scm_make_real (scm_i_big2dbl (x) / yy); |
4714 | } | |
4715 | else if (SCM_COMPLEXP (y)) | |
4716 | { | |
4717 | a = scm_i_big2dbl (x); | |
4718 | goto complex_div; | |
4719 | } | |
f92e85f7 MV |
4720 | else if (SCM_FRACTIONP (y)) |
4721 | return scm_make_ratio (scm_product (x, SCM_FRACTION_DENOMINATOR (y)), | |
4722 | SCM_FRACTION_NUMERATOR (y)); | |
0aacf84e MD |
4723 | else |
4724 | SCM_WTA_DISPATCH_2 (g_divide, x, y, SCM_ARGn, s_divide); | |
f872b822 | 4725 | } |
0aacf84e MD |
4726 | else if (SCM_REALP (x)) |
4727 | { | |
4728 | double rx = SCM_REAL_VALUE (x); | |
4729 | if (SCM_INUMP (y)) | |
4730 | { | |
4731 | long int yy = SCM_INUM (y); | |
7351e207 | 4732 | #ifndef ALLOW_DIVIDE_BY_EXACT_ZERO |
0aacf84e MD |
4733 | if (yy == 0) |
4734 | scm_num_overflow (s_divide); | |
4735 | else | |
7351e207 | 4736 | #endif |
0aacf84e MD |
4737 | return scm_make_real (rx / (double) yy); |
4738 | } | |
4739 | else if (SCM_BIGP (y)) | |
4740 | { | |
4741 | double dby = mpz_get_d (SCM_I_BIG_MPZ (y)); | |
4742 | scm_remember_upto_here_1 (y); | |
4743 | return scm_make_real (rx / dby); | |
4744 | } | |
4745 | else if (SCM_REALP (y)) | |
4746 | { | |
4747 | double yy = SCM_REAL_VALUE (y); | |
7351e207 | 4748 | #ifndef ALLOW_DIVIDE_BY_ZERO |
0aacf84e MD |
4749 | if (yy == 0.0) |
4750 | scm_num_overflow (s_divide); | |
4751 | else | |
7351e207 | 4752 | #endif |
0aacf84e MD |
4753 | return scm_make_real (rx / yy); |
4754 | } | |
4755 | else if (SCM_COMPLEXP (y)) | |
4756 | { | |
4757 | a = rx; | |
4758 | goto complex_div; | |
4759 | } | |
f92e85f7 MV |
4760 | else if (SCM_FRACTIONP (y)) |
4761 | return scm_make_real (rx / scm_i_fraction2double (y)); | |
0aacf84e MD |
4762 | else |
4763 | SCM_WTA_DISPATCH_2 (g_divide, x, y, SCM_ARGn, s_divide); | |
f872b822 | 4764 | } |
0aacf84e MD |
4765 | else if (SCM_COMPLEXP (x)) |
4766 | { | |
4767 | double rx = SCM_COMPLEX_REAL (x); | |
4768 | double ix = SCM_COMPLEX_IMAG (x); | |
4769 | if (SCM_INUMP (y)) | |
4770 | { | |
4771 | long int yy = SCM_INUM (y); | |
7351e207 | 4772 | #ifndef ALLOW_DIVIDE_BY_EXACT_ZERO |
0aacf84e MD |
4773 | if (yy == 0) |
4774 | scm_num_overflow (s_divide); | |
4775 | else | |
7351e207 | 4776 | #endif |
0aacf84e MD |
4777 | { |
4778 | double d = yy; | |
4779 | return scm_make_complex (rx / d, ix / d); | |
4780 | } | |
4781 | } | |
4782 | else if (SCM_BIGP (y)) | |
4783 | { | |
4784 | double dby = mpz_get_d (SCM_I_BIG_MPZ (y)); | |
4785 | scm_remember_upto_here_1 (y); | |
4786 | return scm_make_complex (rx / dby, ix / dby); | |
4787 | } | |
4788 | else if (SCM_REALP (y)) | |
4789 | { | |
4790 | double yy = SCM_REAL_VALUE (y); | |
7351e207 | 4791 | #ifndef ALLOW_DIVIDE_BY_ZERO |
0aacf84e MD |
4792 | if (yy == 0.0) |
4793 | scm_num_overflow (s_divide); | |
4794 | else | |
7351e207 | 4795 | #endif |
0aacf84e MD |
4796 | return scm_make_complex (rx / yy, ix / yy); |
4797 | } | |
4798 | else if (SCM_COMPLEXP (y)) | |
4799 | { | |
4800 | double ry = SCM_COMPLEX_REAL (y); | |
4801 | double iy = SCM_COMPLEX_IMAG (y); | |
4802 | if (ry <= iy) | |
4803 | { | |
4804 | double t = ry / iy; | |
4805 | double d = iy * (1.0 + t * t); | |
4806 | return scm_make_complex ((rx * t + ix) / d, (ix * t - rx) / d); | |
4807 | } | |
4808 | else | |
4809 | { | |
4810 | double t = iy / ry; | |
4811 | double d = ry * (1.0 + t * t); | |
4812 | return scm_make_complex ((rx + ix * t) / d, (ix - rx * t) / d); | |
4813 | } | |
4814 | } | |
f92e85f7 MV |
4815 | else if (SCM_FRACTIONP (y)) |
4816 | { | |
4817 | double yy = scm_i_fraction2double (y); | |
4818 | return scm_make_complex (rx / yy, ix / yy); | |
4819 | } | |
0aacf84e MD |
4820 | else |
4821 | SCM_WTA_DISPATCH_2 (g_divide, x, y, SCM_ARGn, s_divide); | |
f8de44c1 | 4822 | } |
f92e85f7 MV |
4823 | else if (SCM_FRACTIONP (x)) |
4824 | { | |
4825 | if (SCM_INUMP (y)) | |
4826 | { | |
4827 | long int yy = SCM_INUM (y); | |
4828 | #ifndef ALLOW_DIVIDE_BY_EXACT_ZERO | |
4829 | if (yy == 0) | |
4830 | scm_num_overflow (s_divide); | |
4831 | else | |
4832 | #endif | |
4833 | return scm_make_ratio (SCM_FRACTION_NUMERATOR (x), | |
4834 | scm_product (SCM_FRACTION_DENOMINATOR (x), y)); | |
4835 | } | |
4836 | else if (SCM_BIGP (y)) | |
4837 | { | |
4838 | return scm_make_ratio (SCM_FRACTION_NUMERATOR (x), | |
4839 | scm_product (SCM_FRACTION_DENOMINATOR (x), y)); | |
4840 | } | |
4841 | else if (SCM_REALP (y)) | |
4842 | { | |
4843 | double yy = SCM_REAL_VALUE (y); | |
4844 | #ifndef ALLOW_DIVIDE_BY_ZERO | |
4845 | if (yy == 0.0) | |
4846 | scm_num_overflow (s_divide); | |
4847 | else | |
4848 | #endif | |
4849 | return scm_make_real (scm_i_fraction2double (x) / yy); | |
4850 | } | |
4851 | else if (SCM_COMPLEXP (y)) | |
4852 | { | |
4853 | a = scm_i_fraction2double (x); | |
4854 | goto complex_div; | |
4855 | } | |
4856 | else if (SCM_FRACTIONP (y)) | |
4857 | return scm_make_ratio (scm_product (SCM_FRACTION_NUMERATOR (x), SCM_FRACTION_DENOMINATOR (y)), | |
4858 | scm_product (SCM_FRACTION_NUMERATOR (y), SCM_FRACTION_DENOMINATOR (x))); | |
4859 | else | |
4860 | SCM_WTA_DISPATCH_2 (g_divide, x, y, SCM_ARGn, s_divide); | |
4861 | } | |
0aacf84e | 4862 | else |
f8de44c1 | 4863 | SCM_WTA_DISPATCH_2 (g_divide, x, y, SCM_ARG1, s_divide); |
0f2d19dd | 4864 | } |
f92e85f7 MV |
4865 | |
4866 | SCM | |
4867 | scm_divide (SCM x, SCM y) | |
4868 | { | |
4869 | return scm_i_divide (x, y, 0); | |
4870 | } | |
4871 | ||
4872 | static SCM scm_divide2real (SCM x, SCM y) | |
4873 | { | |
4874 | return scm_i_divide (x, y, 1); | |
4875 | } | |
c05e97b7 | 4876 | #undef FUNC_NAME |
0f2d19dd | 4877 | |
fa605590 | 4878 | |
0f2d19dd | 4879 | double |
6e8d25a6 | 4880 | scm_asinh (double x) |
0f2d19dd | 4881 | { |
fa605590 KR |
4882 | #if HAVE_ASINH |
4883 | return asinh (x); | |
4884 | #else | |
4885 | #define asinh scm_asinh | |
f872b822 | 4886 | return log (x + sqrt (x * x + 1)); |
fa605590 | 4887 | #endif |
0f2d19dd | 4888 | } |
fa605590 KR |
4889 | SCM_GPROC1 (s_asinh, "$asinh", scm_tc7_dsubr, (SCM (*)()) asinh, g_asinh); |
4890 | /* "Return the inverse hyperbolic sine of @var{x}." | |
4891 | */ | |
0f2d19dd JB |
4892 | |
4893 | ||
0f2d19dd | 4894 | double |
6e8d25a6 | 4895 | scm_acosh (double x) |
0f2d19dd | 4896 | { |
fa605590 KR |
4897 | #if HAVE_ACOSH |
4898 | return acosh (x); | |
4899 | #else | |
4900 | #define acosh scm_acosh | |
f872b822 | 4901 | return log (x + sqrt (x * x - 1)); |
fa605590 | 4902 | #endif |
0f2d19dd | 4903 | } |
fa605590 KR |
4904 | SCM_GPROC1 (s_acosh, "$acosh", scm_tc7_dsubr, (SCM (*)()) acosh, g_acosh); |
4905 | /* "Return the inverse hyperbolic cosine of @var{x}." | |
4906 | */ | |
0f2d19dd JB |
4907 | |
4908 | ||
0f2d19dd | 4909 | double |
6e8d25a6 | 4910 | scm_atanh (double x) |
0f2d19dd | 4911 | { |
fa605590 KR |
4912 | #if HAVE_ATANH |
4913 | return atanh (x); | |
4914 | #else | |
4915 | #define atanh scm_atanh | |
f872b822 | 4916 | return 0.5 * log ((1 + x) / (1 - x)); |
fa605590 | 4917 | #endif |
0f2d19dd | 4918 | } |
fa605590 KR |
4919 | SCM_GPROC1 (s_atanh, "$atanh", scm_tc7_dsubr, (SCM (*)()) atanh, g_atanh); |
4920 | /* "Return the inverse hyperbolic tangent of @var{x}." | |
4921 | */ | |
0f2d19dd JB |
4922 | |
4923 | ||
f92e85f7 MV |
4924 | /* XXX - eventually, we should remove this definition of scm_round and |
4925 | rename scm_round_number to scm_round. Likewise for scm_truncate | |
4926 | and scm_truncate_number. | |
4927 | */ | |
4928 | ||
0f2d19dd | 4929 | double |
6e8d25a6 | 4930 | scm_truncate (double x) |
0f2d19dd | 4931 | { |
fa605590 KR |
4932 | #if HAVE_TRUNC |
4933 | return trunc (x); | |
4934 | #else | |
f872b822 MD |
4935 | if (x < 0.0) |
4936 | return -floor (-x); | |
4937 | return floor (x); | |
fa605590 | 4938 | #endif |
0f2d19dd | 4939 | } |
0f2d19dd | 4940 | |
6187f48b KR |
4941 | /* scm_round is done using floor(x+0.5) to round to nearest and with |
4942 | half-way case (ie. when x is an integer plus 0.5) going upwards. Then | |
4943 | half-way cases are identified and adjusted down if the round-upwards | |
4944 | didn't give the desired even integer. | |
4945 | ||
4946 | "plus_half == result" identifies a half-way case. If plus_half, which is | |
4947 | x + 0.5, is an integer then x must be an integer plus 0.5. | |
4948 | ||
4949 | An odd "result" value is identified with result/2 != floor(result/2). | |
4950 | This is done with plus_half, since that value is ready for use sooner in | |
4951 | a pipelined cpu, and we're already requiring plus_half == result. | |
4952 | ||
4953 | Note however that we need to be careful when x is big and already an | |
4954 | integer. In that case "x+0.5" may round to an adjacent integer, causing | |
4955 | us to return such a value, incorrectly. For instance if the hardware is | |
4956 | in the usual default nearest-even rounding, then for x = 0x1FFFFFFFFFFFFF | |
4957 | (ie. 53 one bits) we will have x+0.5 = 0x20000000000000 and that value | |
4958 | returned. Or if the hardware is in round-upwards mode, then other bigger | |
4959 | values like say x == 2^128 will see x+0.5 rounding up to the next higher | |
4960 | representable value, 2^128+2^76 (or whatever), again incorrect. | |
4961 | ||
4962 | These bad roundings of x+0.5 are avoided by testing at the start whether | |
4963 | x is already an integer. If it is then clearly that's the desired result | |
4964 | already. And if it's not then the exponent must be small enough to allow | |
4965 | an 0.5 to be represented, and hence added without a bad rounding. */ | |
4966 | ||
0f2d19dd | 4967 | double |
6e8d25a6 | 4968 | scm_round (double x) |
0f2d19dd | 4969 | { |
6187f48b KR |
4970 | double plus_half, result; |
4971 | ||
4972 | if (x == floor (x)) | |
4973 | return x; | |
4974 | ||
4975 | plus_half = x + 0.5; | |
4976 | result = floor (plus_half); | |
0f2d19dd | 4977 | /* Adjust so that the scm_round is towards even. */ |
0aacf84e MD |
4978 | return ((plus_half == result && plus_half / 2 != floor (plus_half / 2)) |
4979 | ? result - 1 | |
4980 | : result); | |
0f2d19dd JB |
4981 | } |
4982 | ||
f92e85f7 MV |
4983 | SCM_DEFINE (scm_truncate_number, "truncate", 1, 0, 0, |
4984 | (SCM x), | |
4985 | "Round the number @var{x} towards zero.") | |
4986 | #define FUNC_NAME s_scm_truncate_number | |
4987 | { | |
73e4de09 | 4988 | if (scm_is_false (scm_negative_p (x))) |
f92e85f7 MV |
4989 | return scm_floor (x); |
4990 | else | |
4991 | return scm_ceiling (x); | |
4992 | } | |
4993 | #undef FUNC_NAME | |
4994 | ||
4995 | static SCM exactly_one_half; | |
4996 | ||
4997 | SCM_DEFINE (scm_round_number, "round", 1, 0, 0, | |
4998 | (SCM x), | |
4999 | "Round the number @var{x} towards the nearest integer. " | |
5000 | "When it is exactly halfway between two integers, " | |
5001 | "round towards the even one.") | |
5002 | #define FUNC_NAME s_scm_round_number | |
5003 | { | |
bae30667 KR |
5004 | if (SCM_INUMP (x) || SCM_BIGP (x)) |
5005 | return x; | |
5006 | else if (SCM_REALP (x)) | |
5007 | return scm_make_real (scm_round (SCM_REAL_VALUE (x))); | |
f92e85f7 | 5008 | else |
bae30667 KR |
5009 | { |
5010 | /* OPTIMIZE-ME: Fraction case could be done more efficiently by a | |
5011 | single quotient+remainder division then examining to see which way | |
5012 | the rounding should go. */ | |
5013 | SCM plus_half = scm_sum (x, exactly_one_half); | |
5014 | SCM result = scm_floor (plus_half); | |
5015 | /* Adjust so that the scm_round is towards even. */ | |
73e4de09 MV |
5016 | if (scm_is_true (scm_num_eq_p (plus_half, result)) |
5017 | && scm_is_true (scm_odd_p (result))) | |
d956fa6f | 5018 | return scm_difference (result, SCM_I_MAKINUM (1)); |
bae30667 KR |
5019 | else |
5020 | return result; | |
5021 | } | |
f92e85f7 MV |
5022 | } |
5023 | #undef FUNC_NAME | |
5024 | ||
5025 | SCM_PRIMITIVE_GENERIC (scm_floor, "floor", 1, 0, 0, | |
5026 | (SCM x), | |
5027 | "Round the number @var{x} towards minus infinity.") | |
5028 | #define FUNC_NAME s_scm_floor | |
5029 | { | |
5030 | if (SCM_INUMP (x) || SCM_BIGP (x)) | |
5031 | return x; | |
5032 | else if (SCM_REALP (x)) | |
5033 | return scm_make_real (floor (SCM_REAL_VALUE (x))); | |
5034 | else if (SCM_FRACTIONP (x)) | |
5035 | { | |
5036 | SCM q = scm_quotient (SCM_FRACTION_NUMERATOR (x), | |
5037 | SCM_FRACTION_DENOMINATOR (x)); | |
73e4de09 | 5038 | if (scm_is_false (scm_negative_p (x))) |
f92e85f7 MV |
5039 | { |
5040 | /* For positive x, rounding towards zero is correct. */ | |
5041 | return q; | |
5042 | } | |
5043 | else | |
5044 | { | |
5045 | /* For negative x, we need to return q-1 unless x is an | |
5046 | integer. But fractions are never integer, per our | |
5047 | assumptions. */ | |
d956fa6f | 5048 | return scm_difference (q, SCM_I_MAKINUM (1)); |
f92e85f7 MV |
5049 | } |
5050 | } | |
5051 | else | |
5052 | SCM_WTA_DISPATCH_1 (g_scm_floor, x, 1, s_scm_floor); | |
5053 | } | |
5054 | #undef FUNC_NAME | |
5055 | ||
5056 | SCM_PRIMITIVE_GENERIC (scm_ceiling, "ceiling", 1, 0, 0, | |
5057 | (SCM x), | |
5058 | "Round the number @var{x} towards infinity.") | |
5059 | #define FUNC_NAME s_scm_ceiling | |
5060 | { | |
5061 | if (SCM_INUMP (x) || SCM_BIGP (x)) | |
5062 | return x; | |
5063 | else if (SCM_REALP (x)) | |
5064 | return scm_make_real (ceil (SCM_REAL_VALUE (x))); | |
5065 | else if (SCM_FRACTIONP (x)) | |
5066 | { | |
5067 | SCM q = scm_quotient (SCM_FRACTION_NUMERATOR (x), | |
5068 | SCM_FRACTION_DENOMINATOR (x)); | |
73e4de09 | 5069 | if (scm_is_false (scm_positive_p (x))) |
f92e85f7 MV |
5070 | { |
5071 | /* For negative x, rounding towards zero is correct. */ | |
5072 | return q; | |
5073 | } | |
5074 | else | |
5075 | { | |
5076 | /* For positive x, we need to return q+1 unless x is an | |
5077 | integer. But fractions are never integer, per our | |
5078 | assumptions. */ | |
d956fa6f | 5079 | return scm_sum (q, SCM_I_MAKINUM (1)); |
f92e85f7 MV |
5080 | } |
5081 | } | |
5082 | else | |
5083 | SCM_WTA_DISPATCH_1 (g_scm_ceiling, x, 1, s_scm_ceiling); | |
5084 | } | |
5085 | #undef FUNC_NAME | |
0f2d19dd | 5086 | |
14b18ed6 | 5087 | SCM_GPROC1 (s_i_sqrt, "$sqrt", scm_tc7_dsubr, (SCM (*)()) sqrt, g_i_sqrt); |
942e5b91 MG |
5088 | /* "Return the square root of the real number @var{x}." |
5089 | */ | |
14b18ed6 | 5090 | SCM_GPROC1 (s_i_abs, "$abs", scm_tc7_dsubr, (SCM (*)()) fabs, g_i_abs); |
942e5b91 MG |
5091 | /* "Return the absolute value of the real number @var{x}." |
5092 | */ | |
14b18ed6 | 5093 | SCM_GPROC1 (s_i_exp, "$exp", scm_tc7_dsubr, (SCM (*)()) exp, g_i_exp); |
942e5b91 MG |
5094 | /* "Return the @var{x}th power of e." |
5095 | */ | |
14b18ed6 | 5096 | SCM_GPROC1 (s_i_log, "$log", scm_tc7_dsubr, (SCM (*)()) log, g_i_log); |
b3fcac34 | 5097 | /* "Return the natural logarithm of the real number @var{x}." |
942e5b91 | 5098 | */ |
14b18ed6 | 5099 | SCM_GPROC1 (s_i_sin, "$sin", scm_tc7_dsubr, (SCM (*)()) sin, g_i_sin); |
942e5b91 MG |
5100 | /* "Return the sine of the real number @var{x}." |
5101 | */ | |
14b18ed6 | 5102 | SCM_GPROC1 (s_i_cos, "$cos", scm_tc7_dsubr, (SCM (*)()) cos, g_i_cos); |
942e5b91 MG |
5103 | /* "Return the cosine of the real number @var{x}." |
5104 | */ | |
14b18ed6 | 5105 | SCM_GPROC1 (s_i_tan, "$tan", scm_tc7_dsubr, (SCM (*)()) tan, g_i_tan); |
942e5b91 MG |
5106 | /* "Return the tangent of the real number @var{x}." |
5107 | */ | |
14b18ed6 | 5108 | SCM_GPROC1 (s_i_asin, "$asin", scm_tc7_dsubr, (SCM (*)()) asin, g_i_asin); |
942e5b91 MG |
5109 | /* "Return the arc sine of the real number @var{x}." |
5110 | */ | |
14b18ed6 | 5111 | SCM_GPROC1 (s_i_acos, "$acos", scm_tc7_dsubr, (SCM (*)()) acos, g_i_acos); |
942e5b91 MG |
5112 | /* "Return the arc cosine of the real number @var{x}." |
5113 | */ | |
14b18ed6 | 5114 | SCM_GPROC1 (s_i_atan, "$atan", scm_tc7_dsubr, (SCM (*)()) atan, g_i_atan); |
942e5b91 MG |
5115 | /* "Return the arc tangent of the real number @var{x}." |
5116 | */ | |
14b18ed6 | 5117 | SCM_GPROC1 (s_i_sinh, "$sinh", scm_tc7_dsubr, (SCM (*)()) sinh, g_i_sinh); |
942e5b91 MG |
5118 | /* "Return the hyperbolic sine of the real number @var{x}." |
5119 | */ | |
14b18ed6 | 5120 | SCM_GPROC1 (s_i_cosh, "$cosh", scm_tc7_dsubr, (SCM (*)()) cosh, g_i_cosh); |
942e5b91 MG |
5121 | /* "Return the hyperbolic cosine of the real number @var{x}." |
5122 | */ | |
14b18ed6 | 5123 | SCM_GPROC1 (s_i_tanh, "$tanh", scm_tc7_dsubr, (SCM (*)()) tanh, g_i_tanh); |
942e5b91 MG |
5124 | /* "Return the hyperbolic tangent of the real number @var{x}." |
5125 | */ | |
f872b822 MD |
5126 | |
5127 | struct dpair | |
5128 | { | |
5129 | double x, y; | |
5130 | }; | |
5131 | ||
27c37006 NJ |
5132 | static void scm_two_doubles (SCM x, |
5133 | SCM y, | |
3eeba8d4 JB |
5134 | const char *sstring, |
5135 | struct dpair * xy); | |
f872b822 MD |
5136 | |
5137 | static void | |
27c37006 NJ |
5138 | scm_two_doubles (SCM x, SCM y, const char *sstring, struct dpair *xy) |
5139 | { | |
0aacf84e | 5140 | if (SCM_INUMP (x)) |
27c37006 | 5141 | xy->x = SCM_INUM (x); |
0aacf84e | 5142 | else if (SCM_BIGP (x)) |
1be6b49c | 5143 | xy->x = scm_i_big2dbl (x); |
0aacf84e | 5144 | else if (SCM_REALP (x)) |
27c37006 | 5145 | xy->x = SCM_REAL_VALUE (x); |
f92e85f7 MV |
5146 | else if (SCM_FRACTIONP (x)) |
5147 | xy->x = scm_i_fraction2double (x); | |
0aacf84e | 5148 | else |
27c37006 | 5149 | scm_wrong_type_arg (sstring, SCM_ARG1, x); |
98cb6e75 | 5150 | |
0aacf84e | 5151 | if (SCM_INUMP (y)) |
27c37006 | 5152 | xy->y = SCM_INUM (y); |
0aacf84e | 5153 | else if (SCM_BIGP (y)) |
1be6b49c | 5154 | xy->y = scm_i_big2dbl (y); |
0aacf84e | 5155 | else if (SCM_REALP (y)) |
27c37006 | 5156 | xy->y = SCM_REAL_VALUE (y); |
f92e85f7 MV |
5157 | else if (SCM_FRACTIONP (y)) |
5158 | xy->y = scm_i_fraction2double (y); | |
0aacf84e | 5159 | else |
27c37006 | 5160 | scm_wrong_type_arg (sstring, SCM_ARG2, y); |
0f2d19dd JB |
5161 | } |
5162 | ||
5163 | ||
a1ec6916 | 5164 | SCM_DEFINE (scm_sys_expt, "$expt", 2, 0, 0, |
27c37006 NJ |
5165 | (SCM x, SCM y), |
5166 | "Return @var{x} raised to the power of @var{y}. This\n" | |
0137a31b | 5167 | "procedure does not accept complex arguments.") |
1bbd0b84 | 5168 | #define FUNC_NAME s_scm_sys_expt |
0f2d19dd JB |
5169 | { |
5170 | struct dpair xy; | |
27c37006 | 5171 | scm_two_doubles (x, y, FUNC_NAME, &xy); |
f8de44c1 | 5172 | return scm_make_real (pow (xy.x, xy.y)); |
0f2d19dd | 5173 | } |
1bbd0b84 | 5174 | #undef FUNC_NAME |
0f2d19dd JB |
5175 | |
5176 | ||
a1ec6916 | 5177 | SCM_DEFINE (scm_sys_atan2, "$atan2", 2, 0, 0, |
27c37006 NJ |
5178 | (SCM x, SCM y), |
5179 | "Return the arc tangent of the two arguments @var{x} and\n" | |
5180 | "@var{y}. This is similar to calculating the arc tangent of\n" | |
5181 | "@var{x} / @var{y}, except that the signs of both arguments\n" | |
0137a31b MG |
5182 | "are used to determine the quadrant of the result. This\n" |
5183 | "procedure does not accept complex arguments.") | |
1bbd0b84 | 5184 | #define FUNC_NAME s_scm_sys_atan2 |
0f2d19dd JB |
5185 | { |
5186 | struct dpair xy; | |
27c37006 | 5187 | scm_two_doubles (x, y, FUNC_NAME, &xy); |
f8de44c1 | 5188 | return scm_make_real (atan2 (xy.x, xy.y)); |
0f2d19dd | 5189 | } |
1bbd0b84 | 5190 | #undef FUNC_NAME |
0f2d19dd JB |
5191 | |
5192 | ||
a1ec6916 | 5193 | SCM_DEFINE (scm_make_rectangular, "make-rectangular", 2, 0, 0, |
bb628794 | 5194 | (SCM real, SCM imaginary), |
942e5b91 MG |
5195 | "Return a complex number constructed of the given @var{real} and\n" |
5196 | "@var{imaginary} parts.") | |
1bbd0b84 | 5197 | #define FUNC_NAME s_scm_make_rectangular |
0f2d19dd JB |
5198 | { |
5199 | struct dpair xy; | |
bb628794 | 5200 | scm_two_doubles (real, imaginary, FUNC_NAME, &xy); |
f8de44c1 | 5201 | return scm_make_complex (xy.x, xy.y); |
0f2d19dd | 5202 | } |
1bbd0b84 | 5203 | #undef FUNC_NAME |
0f2d19dd JB |
5204 | |
5205 | ||
5206 | ||
a1ec6916 | 5207 | SCM_DEFINE (scm_make_polar, "make-polar", 2, 0, 0, |
27c37006 | 5208 | (SCM x, SCM y), |
942e5b91 | 5209 | "Return the complex number @var{x} * e^(i * @var{y}).") |
1bbd0b84 | 5210 | #define FUNC_NAME s_scm_make_polar |
0f2d19dd JB |
5211 | { |
5212 | struct dpair xy; | |
6efadd7c | 5213 | double s, c; |
27c37006 | 5214 | scm_two_doubles (x, y, FUNC_NAME, &xy); |
6efadd7c KR |
5215 | #if HAVE_SINCOS |
5216 | sincos (xy.y, &s, &c); | |
5217 | #else | |
5218 | s = sin (xy.y); | |
5219 | c = cos (xy.y); | |
5220 | #endif | |
5221 | return scm_make_complex (xy.x * c, xy.x * s); | |
0f2d19dd | 5222 | } |
1bbd0b84 | 5223 | #undef FUNC_NAME |
0f2d19dd JB |
5224 | |
5225 | ||
152f82bf | 5226 | SCM_GPROC (s_real_part, "real-part", 1, 0, 0, scm_real_part, g_real_part); |
942e5b91 MG |
5227 | /* "Return the real part of the number @var{z}." |
5228 | */ | |
0f2d19dd | 5229 | SCM |
6e8d25a6 | 5230 | scm_real_part (SCM z) |
0f2d19dd | 5231 | { |
0aacf84e | 5232 | if (SCM_INUMP (z)) |
c2ff8ab0 | 5233 | return z; |
0aacf84e | 5234 | else if (SCM_BIGP (z)) |
c2ff8ab0 | 5235 | return z; |
0aacf84e | 5236 | else if (SCM_REALP (z)) |
c2ff8ab0 | 5237 | return z; |
0aacf84e | 5238 | else if (SCM_COMPLEXP (z)) |
c2ff8ab0 | 5239 | return scm_make_real (SCM_COMPLEX_REAL (z)); |
f92e85f7 | 5240 | else if (SCM_FRACTIONP (z)) |
2fa2d879 | 5241 | return z; |
0aacf84e | 5242 | else |
c2ff8ab0 | 5243 | SCM_WTA_DISPATCH_1 (g_real_part, z, SCM_ARG1, s_real_part); |
0f2d19dd JB |
5244 | } |
5245 | ||
5246 | ||
152f82bf | 5247 | SCM_GPROC (s_imag_part, "imag-part", 1, 0, 0, scm_imag_part, g_imag_part); |
942e5b91 MG |
5248 | /* "Return the imaginary part of the number @var{z}." |
5249 | */ | |
0f2d19dd | 5250 | SCM |
6e8d25a6 | 5251 | scm_imag_part (SCM z) |
0f2d19dd | 5252 | { |
0aacf84e | 5253 | if (SCM_INUMP (z)) |
f872b822 | 5254 | return SCM_INUM0; |
0aacf84e | 5255 | else if (SCM_BIGP (z)) |
f872b822 | 5256 | return SCM_INUM0; |
0aacf84e | 5257 | else if (SCM_REALP (z)) |
c2ff8ab0 | 5258 | return scm_flo0; |
0aacf84e | 5259 | else if (SCM_COMPLEXP (z)) |
c2ff8ab0 | 5260 | return scm_make_real (SCM_COMPLEX_IMAG (z)); |
f92e85f7 MV |
5261 | else if (SCM_FRACTIONP (z)) |
5262 | return SCM_INUM0; | |
0aacf84e | 5263 | else |
c2ff8ab0 | 5264 | SCM_WTA_DISPATCH_1 (g_imag_part, z, SCM_ARG1, s_imag_part); |
0f2d19dd JB |
5265 | } |
5266 | ||
f92e85f7 MV |
5267 | SCM_GPROC (s_numerator, "numerator", 1, 0, 0, scm_numerator, g_numerator); |
5268 | /* "Return the numerator of the number @var{z}." | |
5269 | */ | |
5270 | SCM | |
5271 | scm_numerator (SCM z) | |
5272 | { | |
5273 | if (SCM_INUMP (z)) | |
5274 | return z; | |
5275 | else if (SCM_BIGP (z)) | |
5276 | return z; | |
5277 | else if (SCM_FRACTIONP (z)) | |
5278 | { | |
5279 | scm_i_fraction_reduce (z); | |
5280 | return SCM_FRACTION_NUMERATOR (z); | |
5281 | } | |
5282 | else if (SCM_REALP (z)) | |
5283 | return scm_exact_to_inexact (scm_numerator (scm_inexact_to_exact (z))); | |
5284 | else | |
5285 | SCM_WTA_DISPATCH_1 (g_numerator, z, SCM_ARG1, s_numerator); | |
5286 | } | |
5287 | ||
5288 | ||
5289 | SCM_GPROC (s_denominator, "denominator", 1, 0, 0, scm_denominator, g_denominator); | |
5290 | /* "Return the denominator of the number @var{z}." | |
5291 | */ | |
5292 | SCM | |
5293 | scm_denominator (SCM z) | |
5294 | { | |
5295 | if (SCM_INUMP (z)) | |
d956fa6f | 5296 | return SCM_I_MAKINUM (1); |
f92e85f7 | 5297 | else if (SCM_BIGP (z)) |
d956fa6f | 5298 | return SCM_I_MAKINUM (1); |
f92e85f7 MV |
5299 | else if (SCM_FRACTIONP (z)) |
5300 | { | |
5301 | scm_i_fraction_reduce (z); | |
5302 | return SCM_FRACTION_DENOMINATOR (z); | |
5303 | } | |
5304 | else if (SCM_REALP (z)) | |
5305 | return scm_exact_to_inexact (scm_denominator (scm_inexact_to_exact (z))); | |
5306 | else | |
5307 | SCM_WTA_DISPATCH_1 (g_denominator, z, SCM_ARG1, s_denominator); | |
5308 | } | |
0f2d19dd | 5309 | |
9de33deb | 5310 | SCM_GPROC (s_magnitude, "magnitude", 1, 0, 0, scm_magnitude, g_magnitude); |
942e5b91 MG |
5311 | /* "Return the magnitude of the number @var{z}. This is the same as\n" |
5312 | * "@code{abs} for real arguments, but also allows complex numbers." | |
5313 | */ | |
0f2d19dd | 5314 | SCM |
6e8d25a6 | 5315 | scm_magnitude (SCM z) |
0f2d19dd | 5316 | { |
0aacf84e MD |
5317 | if (SCM_INUMP (z)) |
5318 | { | |
5319 | long int zz = SCM_INUM (z); | |
5320 | if (zz >= 0) | |
5321 | return z; | |
5322 | else if (SCM_POSFIXABLE (-zz)) | |
d956fa6f | 5323 | return SCM_I_MAKINUM (-zz); |
0aacf84e MD |
5324 | else |
5325 | return scm_i_long2big (-zz); | |
5986c47d | 5326 | } |
0aacf84e MD |
5327 | else if (SCM_BIGP (z)) |
5328 | { | |
5329 | int sgn = mpz_sgn (SCM_I_BIG_MPZ (z)); | |
5330 | scm_remember_upto_here_1 (z); | |
5331 | if (sgn < 0) | |
5332 | return scm_i_clonebig (z, 0); | |
5333 | else | |
5334 | return z; | |
5986c47d | 5335 | } |
0aacf84e | 5336 | else if (SCM_REALP (z)) |
c2ff8ab0 | 5337 | return scm_make_real (fabs (SCM_REAL_VALUE (z))); |
0aacf84e | 5338 | else if (SCM_COMPLEXP (z)) |
6efadd7c | 5339 | return scm_make_real (hypot (SCM_COMPLEX_REAL (z), SCM_COMPLEX_IMAG (z))); |
f92e85f7 MV |
5340 | else if (SCM_FRACTIONP (z)) |
5341 | { | |
73e4de09 | 5342 | if (scm_is_false (scm_negative_p (SCM_FRACTION_NUMERATOR (z)))) |
f92e85f7 MV |
5343 | return z; |
5344 | return scm_make_ratio (scm_difference (SCM_FRACTION_NUMERATOR (z), SCM_UNDEFINED), | |
5345 | SCM_FRACTION_DENOMINATOR (z)); | |
5346 | } | |
0aacf84e | 5347 | else |
c2ff8ab0 | 5348 | SCM_WTA_DISPATCH_1 (g_magnitude, z, SCM_ARG1, s_magnitude); |
0f2d19dd JB |
5349 | } |
5350 | ||
5351 | ||
9de33deb | 5352 | SCM_GPROC (s_angle, "angle", 1, 0, 0, scm_angle, g_angle); |
942e5b91 MG |
5353 | /* "Return the angle of the complex number @var{z}." |
5354 | */ | |
0f2d19dd | 5355 | SCM |
6e8d25a6 | 5356 | scm_angle (SCM z) |
0f2d19dd | 5357 | { |
c8ae173e KR |
5358 | /* atan(0,-1) is pi and it'd be possible to have that as a constant like |
5359 | scm_flo0 to save allocating a new flonum with scm_make_real each time. | |
5360 | But if atan2 follows the floating point rounding mode, then the value | |
5361 | is not a constant. Maybe it'd be close enough though. */ | |
0aacf84e MD |
5362 | if (SCM_INUMP (z)) |
5363 | { | |
5364 | if (SCM_INUM (z) >= 0) | |
c8ae173e | 5365 | return scm_flo0; |
0aacf84e MD |
5366 | else |
5367 | return scm_make_real (atan2 (0.0, -1.0)); | |
f872b822 | 5368 | } |
0aacf84e MD |
5369 | else if (SCM_BIGP (z)) |
5370 | { | |
5371 | int sgn = mpz_sgn (SCM_I_BIG_MPZ (z)); | |
5372 | scm_remember_upto_here_1 (z); | |
5373 | if (sgn < 0) | |
5374 | return scm_make_real (atan2 (0.0, -1.0)); | |
5375 | else | |
c8ae173e | 5376 | return scm_flo0; |
0f2d19dd | 5377 | } |
0aacf84e | 5378 | else if (SCM_REALP (z)) |
c8ae173e KR |
5379 | { |
5380 | if (SCM_REAL_VALUE (z) >= 0) | |
5381 | return scm_flo0; | |
5382 | else | |
5383 | return scm_make_real (atan2 (0.0, -1.0)); | |
5384 | } | |
0aacf84e | 5385 | else if (SCM_COMPLEXP (z)) |
f4c627b3 | 5386 | return scm_make_real (atan2 (SCM_COMPLEX_IMAG (z), SCM_COMPLEX_REAL (z))); |
f92e85f7 MV |
5387 | else if (SCM_FRACTIONP (z)) |
5388 | { | |
73e4de09 | 5389 | if (scm_is_false (scm_negative_p (SCM_FRACTION_NUMERATOR (z)))) |
f92e85f7 MV |
5390 | return scm_flo0; |
5391 | else return scm_make_real (atan2 (0.0, -1.0)); | |
5392 | } | |
0aacf84e | 5393 | else |
f4c627b3 | 5394 | SCM_WTA_DISPATCH_1 (g_angle, z, SCM_ARG1, s_angle); |
0f2d19dd JB |
5395 | } |
5396 | ||
5397 | ||
3c9a524f DH |
5398 | SCM_GPROC (s_exact_to_inexact, "exact->inexact", 1, 0, 0, scm_exact_to_inexact, g_exact_to_inexact); |
5399 | /* Convert the number @var{x} to its inexact representation.\n" | |
5400 | */ | |
5401 | SCM | |
5402 | scm_exact_to_inexact (SCM z) | |
5403 | { | |
5404 | if (SCM_INUMP (z)) | |
5405 | return scm_make_real ((double) SCM_INUM (z)); | |
5406 | else if (SCM_BIGP (z)) | |
5407 | return scm_make_real (scm_i_big2dbl (z)); | |
f92e85f7 MV |
5408 | else if (SCM_FRACTIONP (z)) |
5409 | return scm_make_real (scm_i_fraction2double (z)); | |
3c9a524f DH |
5410 | else if (SCM_INEXACTP (z)) |
5411 | return z; | |
5412 | else | |
5413 | SCM_WTA_DISPATCH_1 (g_exact_to_inexact, z, 1, s_exact_to_inexact); | |
5414 | } | |
5415 | ||
5416 | ||
a1ec6916 | 5417 | SCM_DEFINE (scm_inexact_to_exact, "inexact->exact", 1, 0, 0, |
1bbd0b84 | 5418 | (SCM z), |
1e6808ea | 5419 | "Return an exact number that is numerically closest to @var{z}.") |
1bbd0b84 | 5420 | #define FUNC_NAME s_scm_inexact_to_exact |
0f2d19dd | 5421 | { |
0aacf84e | 5422 | if (SCM_INUMP (z)) |
f872b822 | 5423 | return z; |
0aacf84e | 5424 | else if (SCM_BIGP (z)) |
f872b822 | 5425 | return z; |
0aacf84e MD |
5426 | else if (SCM_REALP (z)) |
5427 | { | |
f92e85f7 MV |
5428 | if (xisinf (SCM_REAL_VALUE (z)) || xisnan (SCM_REAL_VALUE (z))) |
5429 | SCM_OUT_OF_RANGE (1, z); | |
2be24db4 | 5430 | else |
f92e85f7 MV |
5431 | { |
5432 | mpq_t frac; | |
5433 | SCM q; | |
5434 | ||
5435 | mpq_init (frac); | |
5436 | mpq_set_d (frac, SCM_REAL_VALUE (z)); | |
5437 | q = scm_make_ratio (scm_i_mpz2num (mpq_numref (frac)), | |
5438 | scm_i_mpz2num (mpq_denref (frac))); | |
5439 | ||
5440 | /* When scm_make_ratio throws, we leak the memory allocated | |
5441 | for frac... | |
5442 | */ | |
5443 | mpq_clear (frac); | |
5444 | return q; | |
5445 | } | |
c2ff8ab0 | 5446 | } |
f92e85f7 MV |
5447 | else if (SCM_FRACTIONP (z)) |
5448 | return z; | |
0aacf84e | 5449 | else |
c2ff8ab0 | 5450 | SCM_WRONG_TYPE_ARG (1, z); |
0f2d19dd | 5451 | } |
1bbd0b84 | 5452 | #undef FUNC_NAME |
0f2d19dd | 5453 | |
f92e85f7 MV |
5454 | SCM_DEFINE (scm_rationalize, "rationalize", 2, 0, 0, |
5455 | (SCM x, SCM err), | |
5456 | "Return an exact number that is within @var{err} of @var{x}.") | |
5457 | #define FUNC_NAME s_scm_rationalize | |
5458 | { | |
5459 | if (SCM_INUMP (x)) | |
5460 | return x; | |
5461 | else if (SCM_BIGP (x)) | |
5462 | return x; | |
5463 | else if ((SCM_REALP (x)) || SCM_FRACTIONP (x)) | |
5464 | { | |
5465 | /* Use continued fractions to find closest ratio. All | |
5466 | arithmetic is done with exact numbers. | |
5467 | */ | |
5468 | ||
5469 | SCM ex = scm_inexact_to_exact (x); | |
5470 | SCM int_part = scm_floor (ex); | |
d956fa6f MV |
5471 | SCM tt = SCM_I_MAKINUM (1); |
5472 | SCM a1 = SCM_I_MAKINUM (0), a2 = SCM_I_MAKINUM (1), a = SCM_I_MAKINUM (0); | |
5473 | SCM b1 = SCM_I_MAKINUM (1), b2 = SCM_I_MAKINUM (0), b = SCM_I_MAKINUM (0); | |
f92e85f7 MV |
5474 | SCM rx; |
5475 | int i = 0; | |
5476 | ||
73e4de09 | 5477 | if (scm_is_true (scm_num_eq_p (ex, int_part))) |
f92e85f7 MV |
5478 | return ex; |
5479 | ||
5480 | ex = scm_difference (ex, int_part); /* x = x-int_part */ | |
5481 | rx = scm_divide (ex, SCM_UNDEFINED); /* rx = 1/x */ | |
5482 | ||
5483 | /* We stop after a million iterations just to be absolutely sure | |
5484 | that we don't go into an infinite loop. The process normally | |
5485 | converges after less than a dozen iterations. | |
5486 | */ | |
5487 | ||
5488 | err = scm_abs (err); | |
5489 | while (++i < 1000000) | |
5490 | { | |
5491 | a = scm_sum (scm_product (a1, tt), a2); /* a = a1*tt + a2 */ | |
5492 | b = scm_sum (scm_product (b1, tt), b2); /* b = b1*tt + b2 */ | |
73e4de09 MV |
5493 | if (scm_is_false (scm_zero_p (b)) && /* b != 0 */ |
5494 | scm_is_false | |
f92e85f7 MV |
5495 | (scm_gr_p (scm_abs (scm_difference (ex, scm_divide (a, b))), |
5496 | err))) /* abs(x-a/b) <= err */ | |
02164269 MV |
5497 | { |
5498 | SCM res = scm_sum (int_part, scm_divide (a, b)); | |
73e4de09 MV |
5499 | if (scm_is_false (scm_exact_p (x)) |
5500 | || scm_is_false (scm_exact_p (err))) | |
02164269 MV |
5501 | return scm_exact_to_inexact (res); |
5502 | else | |
5503 | return res; | |
5504 | } | |
f92e85f7 MV |
5505 | rx = scm_divide (scm_difference (rx, tt), /* rx = 1/(rx - tt) */ |
5506 | SCM_UNDEFINED); | |
5507 | tt = scm_floor (rx); /* tt = floor (rx) */ | |
5508 | a2 = a1; | |
5509 | b2 = b1; | |
5510 | a1 = a; | |
5511 | b1 = b; | |
5512 | } | |
5513 | scm_num_overflow (s_scm_rationalize); | |
5514 | } | |
5515 | else | |
5516 | SCM_WRONG_TYPE_ARG (1, x); | |
5517 | } | |
5518 | #undef FUNC_NAME | |
5519 | ||
3d2e8ceb MV |
5520 | /* Parameters for creating integer conversion routines. |
5521 | ||
5522 | Define the following preprocessor macros before including | |
5523 | "libguile/num2integral.i.c": | |
5524 | ||
5525 | NUM2INTEGRAL - the name of the function for converting from a | |
ca46fb90 RB |
5526 | Scheme object to the integral type. This function will be |
5527 | defined when including "num2integral.i.c". | |
3d2e8ceb MV |
5528 | |
5529 | INTEGRAL2NUM - the name of the function for converting from the | |
ca46fb90 | 5530 | integral type to a Scheme object. This function will be defined. |
3d2e8ceb MV |
5531 | |
5532 | INTEGRAL2BIG - the name of an internal function that createas a | |
ca46fb90 RB |
5533 | bignum from the integral type. This function will be defined. |
5534 | The name should start with "scm_i_". | |
5535 | ||
5536 | ITYPE - the name of the integral type. | |
5537 | ||
9dd023e1 MV |
5538 | UNSIGNED - Define this to 1 when ITYPE is an unsigned type. Define |
5539 | it to 0 otherwise. | |
ca46fb90 RB |
5540 | |
5541 | UNSIGNED_ITYPE - the name of the the unsigned variant of the | |
5542 | integral type. If you don't define this, it defaults to | |
5543 | "unsigned ITYPE" for signed types and simply "ITYPE" for unsigned | |
5544 | ones. | |
5545 | ||
5546 | SIZEOF_ITYPE - an expression giving the size of the integral type | |
5547 | in bytes. This expression must be computable by the | |
5548 | preprocessor. (SIZEOF_FOO values are calculated by configure.in | |
5549 | for common types). | |
5550 | ||
3d2e8ceb MV |
5551 | */ |
5552 | ||
1be6b49c ML |
5553 | #define NUM2INTEGRAL scm_num2short |
5554 | #define INTEGRAL2NUM scm_short2num | |
5555 | #define INTEGRAL2BIG scm_i_short2big | |
ca46fb90 | 5556 | #define UNSIGNED 0 |
1be6b49c | 5557 | #define ITYPE short |
3d2e8ceb | 5558 | #define SIZEOF_ITYPE SIZEOF_SHORT |
1be6b49c ML |
5559 | #include "libguile/num2integral.i.c" |
5560 | ||
5561 | #define NUM2INTEGRAL scm_num2ushort | |
5562 | #define INTEGRAL2NUM scm_ushort2num | |
5563 | #define INTEGRAL2BIG scm_i_ushort2big | |
ca46fb90 | 5564 | #define UNSIGNED 1 |
1be6b49c | 5565 | #define ITYPE unsigned short |
ca46fb90 | 5566 | #define SIZEOF_ITYPE SIZEOF_UNSIGNED_SHORT |
1be6b49c ML |
5567 | #include "libguile/num2integral.i.c" |
5568 | ||
5569 | #define NUM2INTEGRAL scm_num2int | |
5570 | #define INTEGRAL2NUM scm_int2num | |
5571 | #define INTEGRAL2BIG scm_i_int2big | |
ca46fb90 | 5572 | #define UNSIGNED 0 |
1be6b49c | 5573 | #define ITYPE int |
3d2e8ceb | 5574 | #define SIZEOF_ITYPE SIZEOF_INT |
1be6b49c ML |
5575 | #include "libguile/num2integral.i.c" |
5576 | ||
5577 | #define NUM2INTEGRAL scm_num2uint | |
5578 | #define INTEGRAL2NUM scm_uint2num | |
5579 | #define INTEGRAL2BIG scm_i_uint2big | |
ca46fb90 | 5580 | #define UNSIGNED 1 |
1be6b49c | 5581 | #define ITYPE unsigned int |
ca46fb90 | 5582 | #define SIZEOF_ITYPE SIZEOF_UNSIGNED_INT |
1be6b49c ML |
5583 | #include "libguile/num2integral.i.c" |
5584 | ||
5585 | #define NUM2INTEGRAL scm_num2long | |
5586 | #define INTEGRAL2NUM scm_long2num | |
5587 | #define INTEGRAL2BIG scm_i_long2big | |
ca46fb90 | 5588 | #define UNSIGNED 0 |
1be6b49c | 5589 | #define ITYPE long |
3d2e8ceb | 5590 | #define SIZEOF_ITYPE SIZEOF_LONG |
1be6b49c ML |
5591 | #include "libguile/num2integral.i.c" |
5592 | ||
5593 | #define NUM2INTEGRAL scm_num2ulong | |
5594 | #define INTEGRAL2NUM scm_ulong2num | |
5595 | #define INTEGRAL2BIG scm_i_ulong2big | |
ca46fb90 | 5596 | #define UNSIGNED 1 |
1be6b49c | 5597 | #define ITYPE unsigned long |
ca46fb90 | 5598 | #define SIZEOF_ITYPE SIZEOF_UNSIGNED_LONG |
1be6b49c ML |
5599 | #include "libguile/num2integral.i.c" |
5600 | ||
1be6b49c ML |
5601 | #define NUM2INTEGRAL scm_num2ptrdiff |
5602 | #define INTEGRAL2NUM scm_ptrdiff2num | |
5603 | #define INTEGRAL2BIG scm_i_ptrdiff2big | |
ca46fb90 | 5604 | #define UNSIGNED 0 |
ee33d62a | 5605 | #define ITYPE scm_t_ptrdiff |
3d2e8ceb | 5606 | #define UNSIGNED_ITYPE size_t |
ee33d62a | 5607 | #define SIZEOF_ITYPE SCM_SIZEOF_SCM_T_PTRDIFF |
1be6b49c ML |
5608 | #include "libguile/num2integral.i.c" |
5609 | ||
5610 | #define NUM2INTEGRAL scm_num2size | |
5611 | #define INTEGRAL2NUM scm_size2num | |
5612 | #define INTEGRAL2BIG scm_i_size2big | |
ca46fb90 | 5613 | #define UNSIGNED 1 |
1be6b49c | 5614 | #define ITYPE size_t |
3d2e8ceb | 5615 | #define SIZEOF_ITYPE SIZEOF_SIZE_T |
1be6b49c | 5616 | #include "libguile/num2integral.i.c" |
0f2d19dd | 5617 | |
ee33d62a | 5618 | #if SCM_SIZEOF_LONG_LONG != 0 |
1cc91f1b | 5619 | |
1be6b49c ML |
5620 | #define NUM2INTEGRAL scm_num2long_long |
5621 | #define INTEGRAL2NUM scm_long_long2num | |
5622 | #define INTEGRAL2BIG scm_i_long_long2big | |
ca46fb90 | 5623 | #define UNSIGNED 0 |
1be6b49c | 5624 | #define ITYPE long long |
3d2e8ceb | 5625 | #define SIZEOF_ITYPE SIZEOF_LONG_LONG |
1be6b49c ML |
5626 | #include "libguile/num2integral.i.c" |
5627 | ||
5628 | #define NUM2INTEGRAL scm_num2ulong_long | |
5629 | #define INTEGRAL2NUM scm_ulong_long2num | |
5630 | #define INTEGRAL2BIG scm_i_ulong_long2big | |
ca46fb90 | 5631 | #define UNSIGNED 1 |
1be6b49c | 5632 | #define ITYPE unsigned long long |
ca46fb90 | 5633 | #define SIZEOF_ITYPE SIZEOF_UNSIGNED_LONG_LONG |
1be6b49c | 5634 | #include "libguile/num2integral.i.c" |
0f2d19dd | 5635 | |
ee33d62a | 5636 | #endif /* SCM_SIZEOF_LONG_LONG != 0 */ |
caf08e65 | 5637 | |
5437598b MD |
5638 | #define NUM2FLOAT scm_num2float |
5639 | #define FLOAT2NUM scm_float2num | |
5640 | #define FTYPE float | |
5641 | #include "libguile/num2float.i.c" | |
5642 | ||
5643 | #define NUM2FLOAT scm_num2double | |
5644 | #define FLOAT2NUM scm_double2num | |
5645 | #define FTYPE double | |
5646 | #include "libguile/num2float.i.c" | |
5647 | ||
73e4de09 MV |
5648 | /* conversion functions */ |
5649 | ||
5650 | int | |
5651 | scm_is_integer (SCM val) | |
5652 | { | |
5653 | return scm_is_true (scm_integer_p (val)); | |
5654 | } | |
5655 | ||
5656 | int | |
5657 | scm_is_signed_integer (SCM val, scm_t_intmax min, scm_t_intmax max) | |
5658 | { | |
5659 | if (SCM_INUMP (val)) | |
5660 | { | |
5661 | scm_t_signed_bits n = SCM_INUM (val); | |
5662 | return n >= min && n <= max; | |
5663 | } | |
5664 | else if (SCM_BIGP (val)) | |
5665 | { | |
5666 | if (min >= SCM_MOST_NEGATIVE_FIXNUM && max <= SCM_MOST_POSITIVE_FIXNUM) | |
5667 | return 0; | |
5668 | else if (min >= LONG_MIN && max <= LONG_MAX) | |
d956fa6f MV |
5669 | { |
5670 | if (mpz_fits_slong_p (SCM_I_BIG_MPZ (val))) | |
5671 | { | |
5672 | long n = mpz_get_si (SCM_I_BIG_MPZ (val)); | |
5673 | return n >= min && n <= max; | |
5674 | } | |
5675 | else | |
5676 | return 0; | |
5677 | } | |
73e4de09 MV |
5678 | else |
5679 | { | |
d956fa6f MV |
5680 | scm_t_intmax n; |
5681 | size_t count; | |
73e4de09 | 5682 | |
d956fa6f MV |
5683 | if (mpz_sizeinbase (SCM_I_BIG_MPZ (val), 2) |
5684 | > CHAR_BIT*sizeof (scm_t_uintmax)) | |
5685 | return 0; | |
5686 | ||
5687 | mpz_export (&n, &count, 1, sizeof (scm_t_uintmax), 0, 0, | |
5688 | SCM_I_BIG_MPZ (val)); | |
73e4de09 | 5689 | |
d956fa6f | 5690 | if (mpz_sgn (SCM_I_BIG_MPZ (val)) >= 0) |
73e4de09 | 5691 | { |
d956fa6f MV |
5692 | if (n < 0) |
5693 | return 0; | |
73e4de09 | 5694 | } |
73e4de09 MV |
5695 | else |
5696 | { | |
d956fa6f MV |
5697 | n = -n; |
5698 | if (n >= 0) | |
5699 | return 0; | |
73e4de09 | 5700 | } |
d956fa6f MV |
5701 | |
5702 | return n >= min && n <= max; | |
73e4de09 MV |
5703 | } |
5704 | } | |
73e4de09 MV |
5705 | else |
5706 | return 0; | |
5707 | } | |
5708 | ||
5709 | int | |
5710 | scm_is_unsigned_integer (SCM val, scm_t_uintmax min, scm_t_uintmax max) | |
5711 | { | |
5712 | if (SCM_INUMP (val)) | |
5713 | { | |
5714 | scm_t_signed_bits n = SCM_INUM (val); | |
5715 | return n >= 0 && ((scm_t_uintmax)n) >= min && ((scm_t_uintmax)n) <= max; | |
5716 | } | |
5717 | else if (SCM_BIGP (val)) | |
5718 | { | |
5719 | if (max <= SCM_MOST_POSITIVE_FIXNUM) | |
5720 | return 0; | |
5721 | else if (max <= ULONG_MAX) | |
d956fa6f MV |
5722 | { |
5723 | if (mpz_fits_ulong_p (SCM_I_BIG_MPZ (val))) | |
5724 | { | |
5725 | unsigned long n = mpz_get_ui (SCM_I_BIG_MPZ (val)); | |
5726 | return n >= min && n <= max; | |
5727 | } | |
5728 | else | |
5729 | return 0; | |
5730 | } | |
73e4de09 MV |
5731 | else |
5732 | { | |
d956fa6f MV |
5733 | scm_t_uintmax n; |
5734 | size_t count; | |
73e4de09 | 5735 | |
d956fa6f MV |
5736 | if (mpz_sgn (SCM_I_BIG_MPZ (val)) < 0) |
5737 | return 0; | |
73e4de09 | 5738 | |
d956fa6f MV |
5739 | if (mpz_sizeinbase (SCM_I_BIG_MPZ (val), 2) |
5740 | > CHAR_BIT*sizeof (scm_t_uintmax)) | |
73e4de09 | 5741 | return 0; |
d956fa6f MV |
5742 | |
5743 | mpz_export (&n, &count, 1, sizeof (scm_t_uintmax), 0, 0, | |
5744 | SCM_I_BIG_MPZ (val)); | |
73e4de09 | 5745 | |
d956fa6f | 5746 | return n >= min && n <= max; |
73e4de09 MV |
5747 | } |
5748 | } | |
73e4de09 MV |
5749 | else |
5750 | return 0; | |
5751 | } | |
5752 | ||
5753 | scm_t_intmax | |
5754 | scm_to_signed_integer (SCM val, scm_t_intmax min, scm_t_intmax max) | |
5755 | { | |
5756 | if (SCM_INUMP (val)) | |
5757 | { | |
5758 | scm_t_signed_bits n = SCM_INUM (val); | |
5759 | if (n >= min && n <= max) | |
5760 | return n; | |
5761 | else | |
5762 | { | |
5763 | out_of_range: | |
5764 | scm_out_of_range (NULL, val); | |
5765 | return 0; | |
5766 | } | |
5767 | } | |
5768 | else if (SCM_BIGP (val)) | |
5769 | { | |
5770 | if (min >= SCM_MOST_NEGATIVE_FIXNUM && max <= SCM_MOST_POSITIVE_FIXNUM) | |
5771 | goto out_of_range; | |
5772 | else if (min >= LONG_MIN && max <= LONG_MAX) | |
5773 | { | |
5774 | if (mpz_fits_slong_p (SCM_I_BIG_MPZ (val))) | |
5775 | { | |
5776 | long n = mpz_get_si (SCM_I_BIG_MPZ (val)); | |
5777 | if (n >= min && n <= max) | |
5778 | return n; | |
5779 | else | |
5780 | goto out_of_range; | |
5781 | } | |
5782 | else | |
5783 | goto out_of_range; | |
5784 | } | |
5785 | else | |
5786 | { | |
5787 | scm_t_intmax n; | |
5788 | size_t count; | |
5789 | ||
5790 | if (mpz_sizeinbase (SCM_I_BIG_MPZ (val), 2) | |
d956fa6f | 5791 | > CHAR_BIT*sizeof (scm_t_uintmax)) |
73e4de09 MV |
5792 | goto out_of_range; |
5793 | ||
5794 | mpz_export (&n, &count, 1, sizeof (scm_t_uintmax), 0, 0, | |
5795 | SCM_I_BIG_MPZ (val)); | |
5796 | ||
5797 | if (mpz_sgn (SCM_I_BIG_MPZ (val)) >= 0) | |
5798 | { | |
5799 | if (n < 0) | |
5800 | goto out_of_range; | |
5801 | } | |
5802 | else | |
5803 | { | |
5804 | n = -n; | |
5805 | if (n >= 0) | |
5806 | goto out_of_range; | |
5807 | } | |
5808 | ||
5809 | if (n >= min && n <= max) | |
5810 | return n; | |
5811 | else | |
5812 | goto out_of_range; | |
5813 | } | |
5814 | } | |
73e4de09 MV |
5815 | else |
5816 | { | |
5efd3c7d | 5817 | scm_wrong_type_arg_msg (NULL, 0, val, "exact integer"); |
73e4de09 MV |
5818 | return 0; |
5819 | } | |
5820 | } | |
5821 | ||
5822 | scm_t_uintmax | |
5823 | scm_to_unsigned_integer (SCM val, scm_t_uintmax min, scm_t_uintmax max) | |
5824 | { | |
5825 | if (SCM_INUMP (val)) | |
5826 | { | |
5827 | scm_t_signed_bits n = SCM_INUM (val); | |
5828 | if (n >= 0 && ((scm_t_uintmax)n) >= min && ((scm_t_uintmax)n) <= max) | |
5829 | return n; | |
5830 | else | |
5831 | { | |
5832 | out_of_range: | |
5833 | scm_out_of_range (NULL, val); | |
5834 | return 0; | |
5835 | } | |
5836 | } | |
5837 | else if (SCM_BIGP (val)) | |
5838 | { | |
5839 | if (max <= SCM_MOST_POSITIVE_FIXNUM) | |
5840 | goto out_of_range; | |
5841 | else if (max <= ULONG_MAX) | |
5842 | { | |
5843 | if (mpz_fits_ulong_p (SCM_I_BIG_MPZ (val))) | |
5844 | { | |
5845 | unsigned long n = mpz_get_ui (SCM_I_BIG_MPZ (val)); | |
5846 | if (n >= min && n <= max) | |
5847 | return n; | |
5848 | else | |
5849 | goto out_of_range; | |
d956fa6f | 5850 | } |
73e4de09 MV |
5851 | else |
5852 | goto out_of_range; | |
5853 | } | |
5854 | else | |
5855 | { | |
5856 | scm_t_uintmax n; | |
5857 | size_t count; | |
5858 | ||
5859 | if (mpz_sgn (SCM_I_BIG_MPZ (val)) < 0) | |
5860 | goto out_of_range; | |
5861 | ||
5862 | if (mpz_sizeinbase (SCM_I_BIG_MPZ (val), 2) | |
d956fa6f | 5863 | > CHAR_BIT*sizeof (scm_t_uintmax)) |
73e4de09 MV |
5864 | goto out_of_range; |
5865 | ||
5866 | mpz_export (&n, &count, 1, sizeof (scm_t_uintmax), 0, 0, | |
5867 | SCM_I_BIG_MPZ (val)); | |
5868 | ||
5869 | if (n >= min && n <= max) | |
5870 | return n; | |
5871 | else | |
5872 | goto out_of_range; | |
5873 | } | |
5874 | } | |
73e4de09 MV |
5875 | else |
5876 | { | |
5efd3c7d | 5877 | scm_wrong_type_arg_msg (NULL, 0, val, "exact integer"); |
73e4de09 MV |
5878 | return 0; |
5879 | } | |
5880 | } | |
5881 | ||
5882 | SCM | |
5883 | scm_from_signed_integer (scm_t_intmax val) | |
5884 | { | |
5885 | if (SCM_FIXABLE (val)) | |
d956fa6f | 5886 | return SCM_I_MAKINUM (val); |
73e4de09 MV |
5887 | else if (val >= LONG_MIN && val <= LONG_MAX) |
5888 | { | |
5889 | SCM z = scm_double_cell (scm_tc16_big, 0, 0, 0); | |
5890 | mpz_init_set_si (SCM_I_BIG_MPZ (z), val); | |
5891 | return z; | |
5892 | } | |
5893 | else | |
5894 | { | |
5895 | SCM z = scm_double_cell (scm_tc16_big, 0, 0, 0); | |
5896 | mpz_init (SCM_I_BIG_MPZ (z)); | |
5897 | if (val < 0) | |
5898 | { | |
5899 | val = -val; | |
5900 | mpz_import (SCM_I_BIG_MPZ (z), 1, 1, sizeof (scm_t_intmax), 0, 0, | |
5901 | &val); | |
5902 | mpz_neg (SCM_I_BIG_MPZ (z), SCM_I_BIG_MPZ (z)); | |
5903 | } | |
5904 | else | |
5905 | mpz_import (SCM_I_BIG_MPZ (z), 1, 1, sizeof (scm_t_intmax), 0, 0, | |
5906 | &val); | |
5907 | return z; | |
5908 | } | |
5909 | } | |
5910 | ||
5911 | SCM | |
5912 | scm_from_unsigned_integer (scm_t_uintmax val) | |
5913 | { | |
5914 | if (SCM_POSFIXABLE (val)) | |
d956fa6f | 5915 | return SCM_I_MAKINUM (val); |
73e4de09 MV |
5916 | else if (val <= ULONG_MAX) |
5917 | { | |
5918 | SCM z = scm_double_cell (scm_tc16_big, 0, 0, 0); | |
5919 | mpz_init_set_ui (SCM_I_BIG_MPZ (z), val); | |
5920 | return z; | |
5921 | } | |
5922 | else | |
5923 | { | |
5924 | SCM z = scm_double_cell (scm_tc16_big, 0, 0, 0); | |
5925 | mpz_init (SCM_I_BIG_MPZ (z)); | |
5926 | mpz_import (SCM_I_BIG_MPZ (z), 1, 1, sizeof (scm_t_uintmax), 0, 0, | |
5927 | &val); | |
5928 | return z; | |
5929 | } | |
5930 | } | |
5931 | ||
5932 | int | |
5933 | scm_is_real (SCM val) | |
5934 | { | |
5935 | return scm_is_true (scm_real_p (val)); | |
5936 | } | |
5937 | ||
5938 | double | |
5939 | scm_to_double (SCM val) | |
5940 | { | |
5941 | return scm_num2dbl (val, NULL); | |
5942 | } | |
5943 | ||
5944 | SCM | |
5945 | scm_from_double (double val) | |
5946 | { | |
5947 | return scm_make_real (val); | |
5948 | } | |
5949 | ||
1be6b49c | 5950 | #ifdef GUILE_DEBUG |
caf08e65 | 5951 | |
6063dc1d SJ |
5952 | #ifndef SIZE_MAX |
5953 | #define SIZE_MAX ((size_t) (-1)) | |
5954 | #endif | |
5955 | #ifndef PTRDIFF_MIN | |
5956 | #define PTRDIFF_MIN \ | |
b4fb7de8 RB |
5957 | ((scm_t_ptrdiff) ((scm_t_ptrdiff) 1 \ |
5958 | << ((sizeof (scm_t_ptrdiff) * SCM_CHAR_BIT) - 1))) | |
6063dc1d SJ |
5959 | #endif |
5960 | #ifndef PTRDIFF_MAX | |
5961 | #define PTRDIFF_MAX (~ PTRDIFF_MIN) | |
5962 | #endif | |
5963 | ||
0aacf84e MD |
5964 | #define CHECK(type, v) \ |
5965 | do \ | |
5966 | { \ | |
5967 | if ((v) != scm_num2##type (scm_##type##2num (v), 1, "check_sanity")) \ | |
5968 | abort (); \ | |
5969 | } \ | |
5970 | while (0) | |
caf08e65 | 5971 | |
1be6b49c ML |
5972 | static void |
5973 | check_sanity () | |
5974 | { | |
5975 | CHECK (short, 0); | |
5976 | CHECK (ushort, 0U); | |
5977 | CHECK (int, 0); | |
5978 | CHECK (uint, 0U); | |
5979 | CHECK (long, 0L); | |
5980 | CHECK (ulong, 0UL); | |
5981 | CHECK (size, 0); | |
5982 | CHECK (ptrdiff, 0); | |
5983 | ||
5984 | CHECK (short, -1); | |
5985 | CHECK (int, -1); | |
5986 | CHECK (long, -1L); | |
5987 | CHECK (ptrdiff, -1); | |
5988 | ||
5989 | CHECK (short, SHRT_MAX); | |
5990 | CHECK (short, SHRT_MIN); | |
5991 | CHECK (ushort, USHRT_MAX); | |
5992 | CHECK (int, INT_MAX); | |
5993 | CHECK (int, INT_MIN); | |
5994 | CHECK (uint, UINT_MAX); | |
5995 | CHECK (long, LONG_MAX); | |
5996 | CHECK (long, LONG_MIN); | |
5997 | CHECK (ulong, ULONG_MAX); | |
5998 | CHECK (size, SIZE_MAX); | |
5999 | CHECK (ptrdiff, PTRDIFF_MAX); | |
6000 | CHECK (ptrdiff, PTRDIFF_MIN); | |
0f2d19dd | 6001 | |
ee33d62a | 6002 | #if SCM_SIZEOF_LONG_LONG != 0 |
1be6b49c ML |
6003 | CHECK (long_long, 0LL); |
6004 | CHECK (ulong_long, 0ULL); | |
1be6b49c | 6005 | CHECK (long_long, -1LL); |
d956fa6f MV |
6006 | CHECK (long_long, SCM_I_LLONG_MAX); |
6007 | CHECK (long_long, SCM_I_LLONG_MIN); | |
6008 | CHECK (ulong_long, SCM_I_ULLONG_MAX); | |
1be6b49c | 6009 | #endif |
0f2d19dd JB |
6010 | } |
6011 | ||
b10586f0 ML |
6012 | #undef CHECK |
6013 | ||
6014 | #define CHECK \ | |
6015 | scm_internal_catch (SCM_BOOL_T, check_body, &data, check_handler, &data); \ | |
73e4de09 | 6016 | if (scm_is_true (data)) abort(); |
b10586f0 ML |
6017 | |
6018 | static SCM | |
6019 | check_body (void *data) | |
6020 | { | |
6021 | SCM num = *(SCM *) data; | |
6022 | scm_num2ulong (num, 1, NULL); | |
6023 | ||
6024 | return SCM_UNSPECIFIED; | |
6025 | } | |
6026 | ||
6027 | static SCM | |
6028 | check_handler (void *data, SCM tag, SCM throw_args) | |
6029 | { | |
6030 | SCM *num = (SCM *) data; | |
6031 | *num = SCM_BOOL_F; | |
6032 | ||
6033 | return SCM_UNSPECIFIED; | |
6034 | } | |
6035 | ||
6036 | SCM_DEFINE (scm_sys_check_number_conversions, "%check-number-conversions", 0, 0, 0, | |
b4e15479 | 6037 | (void), |
b10586f0 ML |
6038 | "Number conversion sanity checking.") |
6039 | #define FUNC_NAME s_scm_sys_check_number_conversions | |
6040 | { | |
d956fa6f | 6041 | SCM data = SCM_I_MAKINUM (-1); |
b10586f0 ML |
6042 | CHECK; |
6043 | data = scm_int2num (INT_MIN); | |
6044 | CHECK; | |
6045 | data = scm_ulong2num (ULONG_MAX); | |
6046 | data = scm_difference (SCM_INUM0, data); | |
6047 | CHECK; | |
6048 | data = scm_ulong2num (ULONG_MAX); | |
d956fa6f | 6049 | data = scm_sum (SCM_I_MAKINUM (1), data); data = scm_difference (SCM_INUM0, data); |
b10586f0 ML |
6050 | CHECK; |
6051 | data = scm_int2num (-10000); data = scm_product (data, data); data = scm_product (data, data); | |
6052 | CHECK; | |
6053 | ||
6054 | return SCM_UNSPECIFIED; | |
6055 | } | |
6056 | #undef FUNC_NAME | |
6057 | ||
1be6b49c | 6058 | #endif |
0f2d19dd | 6059 | |
0f2d19dd JB |
6060 | void |
6061 | scm_init_numbers () | |
0f2d19dd | 6062 | { |
0b799eea MV |
6063 | int i; |
6064 | ||
713a4259 KR |
6065 | mpz_init_set_si (z_negative_one, -1); |
6066 | ||
a261c0e9 DH |
6067 | /* It may be possible to tune the performance of some algorithms by using |
6068 | * the following constants to avoid the creation of bignums. Please, before | |
6069 | * using these values, remember the two rules of program optimization: | |
6070 | * 1st Rule: Don't do it. 2nd Rule (experts only): Don't do it yet. */ | |
86d31dfe | 6071 | scm_c_define ("most-positive-fixnum", |
d956fa6f | 6072 | SCM_I_MAKINUM (SCM_MOST_POSITIVE_FIXNUM)); |
86d31dfe | 6073 | scm_c_define ("most-negative-fixnum", |
d956fa6f | 6074 | SCM_I_MAKINUM (SCM_MOST_NEGATIVE_FIXNUM)); |
a261c0e9 | 6075 | |
f3ae5d60 MD |
6076 | scm_add_feature ("complex"); |
6077 | scm_add_feature ("inexact"); | |
5986c47d | 6078 | scm_flo0 = scm_make_real (0.0); |
0b799eea MV |
6079 | |
6080 | /* determine floating point precision */ | |
6081 | for(i=2; i <= SCM_MAX_DBL_RADIX; ++i) | |
6082 | { | |
6083 | init_dblprec(&scm_dblprec[i-2],i); | |
6084 | init_fx_radix(fx_per_radix[i-2],i); | |
6085 | } | |
f872b822 | 6086 | #ifdef DBL_DIG |
0b799eea MV |
6087 | /* hard code precision for base 10 if the preprocessor tells us to... */ |
6088 | scm_dblprec[10-2] = (DBL_DIG > 20) ? 20 : DBL_DIG; | |
6089 | #endif | |
1be6b49c ML |
6090 | |
6091 | #ifdef GUILE_DEBUG | |
6092 | check_sanity (); | |
6093 | #endif | |
f92e85f7 | 6094 | |
d956fa6f MV |
6095 | exactly_one_half = scm_permanent_object (scm_divide (SCM_I_MAKINUM (1), |
6096 | SCM_I_MAKINUM (2))); | |
a0599745 | 6097 | #include "libguile/numbers.x" |
0f2d19dd | 6098 | } |
89e00824 ML |
6099 | |
6100 | /* | |
6101 | Local Variables: | |
6102 | c-file-style: "gnu" | |
6103 | End: | |
6104 | */ |