Commit | Line | Data |
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16d35552 | 1 | /* Copyright (C) 1995,1996,1997,1998, 1999, 2000 Free Software Foundation, Inc. |
ee2a8b9b JB |
2 | * This program is free software; you can redistribute it and/or modify |
3 | * it under the terms of the GNU General Public License as published by | |
4 | * the Free Software Foundation; either version 2, or (at your option) | |
5 | * any later version. | |
6 | * | |
7 | * This program is distributed in the hope that it will be useful, | |
8 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
9 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
10 | * GNU General Public License for more details. | |
11 | * | |
12 | * You should have received a copy of the GNU General Public License | |
13 | * along with this software; see the file COPYING. If not, write to | |
82892bed JB |
14 | * the Free Software Foundation, Inc., 59 Temple Place, Suite 330, |
15 | * Boston, MA 02111-1307 USA | |
ee2a8b9b JB |
16 | * |
17 | * As a special exception, the Free Software Foundation gives permission | |
18 | * for additional uses of the text contained in its release of GUILE. | |
19 | * | |
20 | * The exception is that, if you link the GUILE library with other files | |
21 | * to produce an executable, this does not by itself cause the | |
22 | * resulting executable to be covered by the GNU General Public License. | |
23 | * Your use of that executable is in no way restricted on account of | |
24 | * linking the GUILE library code into it. | |
25 | * | |
26 | * This exception does not however invalidate any other reasons why | |
27 | * the executable file might be covered by the GNU General Public License. | |
28 | * | |
29 | * This exception applies only to the code released by the | |
30 | * Free Software Foundation under the name GUILE. If you copy | |
31 | * code from other Free Software Foundation releases into a copy of | |
32 | * GUILE, as the General Public License permits, the exception does | |
33 | * not apply to the code that you add in this way. To avoid misleading | |
34 | * anyone as to the status of such modified files, you must delete | |
35 | * this exception notice from them. | |
36 | * | |
37 | * If you write modifications of your own for GUILE, it is your choice | |
38 | * whether to permit this exception to apply to your modifications. | |
82892bed | 39 | * If you do not wish that, delete this exception notice. */ |
ee2a8b9b JB |
40 | \f |
41 | ||
42 | /* data initialization and C<->Scheme data conversion */ | |
43 | ||
44 | #include <stdio.h> | |
45 | ||
a0599745 | 46 | #include "libguile/gh.h" |
bd9e24b3 GH |
47 | #ifdef HAVE_STRING_H |
48 | #include <string.h> | |
49 | #endif | |
ee2a8b9b JB |
50 | |
51 | /* data conversion C->scheme */ | |
52 | SCM | |
dbb3005d MG |
53 | gh_int2scmb (int x) /* this is being phased out */ |
54 | { | |
156dcb09 | 55 | return SCM_BOOL(x); |
dbb3005d MG |
56 | } |
57 | SCM | |
58 | gh_bool2scm (int x) | |
ee2a8b9b | 59 | { |
156dcb09 | 60 | return SCM_BOOL(x); |
ee2a8b9b JB |
61 | } |
62 | SCM | |
63 | gh_int2scm (int x) | |
64 | { | |
65 | return scm_long2num ((long) x); | |
66 | } | |
67 | SCM | |
68 | gh_ulong2scm (unsigned long x) | |
69 | { | |
70 | return scm_ulong2num (x); | |
71 | } | |
72 | SCM | |
73 | gh_long2scm (long x) | |
74 | { | |
75 | return scm_long2num (x); | |
76 | } | |
77 | SCM | |
78 | gh_double2scm (double x) | |
79 | { | |
80 | return scm_makdbl (x, 0.0); | |
81 | } | |
82 | SCM | |
83 | gh_char2scm (char c) | |
84 | { | |
7866a09b | 85 | return SCM_MAKE_CHAR (c); |
ee2a8b9b JB |
86 | } |
87 | SCM | |
70d63753 | 88 | gh_str2scm (const char *s, int len) |
ee2a8b9b JB |
89 | { |
90 | return scm_makfromstr (s, len, 0); | |
91 | } | |
92 | SCM | |
6e706938 | 93 | gh_str02scm (const char *s) |
ee2a8b9b JB |
94 | { |
95 | return scm_makfrom0str (s); | |
96 | } | |
97 | /* Copy LEN characters at SRC into the *existing* Scheme string DST, | |
98 | starting at START. START is an index into DST; zero means the | |
99 | beginning of the string. | |
100 | ||
101 | If START + LEN is off the end of DST, signal an out-of-range | |
102 | error. */ | |
103 | void | |
104 | gh_set_substr (char *src, SCM dst, int start, int len) | |
105 | { | |
2c92112b | 106 | char *dst_ptr; |
fd88bd7c JB |
107 | unsigned long dst_len; |
108 | unsigned long effective_length; | |
ee2a8b9b | 109 | |
0c95b57d | 110 | SCM_ASSERT (SCM_STRINGP (dst), dst, SCM_ARG3, |
ee2a8b9b | 111 | "gh_set_substr"); |
fd88bd7c | 112 | |
ee2a8b9b JB |
113 | dst_ptr = SCM_CHARS (dst); |
114 | dst_len = SCM_LENGTH (dst); | |
fd88bd7c JB |
115 | SCM_ASSERT (len >= 0 && (unsigned) len <= dst_len, |
116 | dst, SCM_ARG4, "gh_set_substr"); | |
117 | ||
118 | scm_protect_object (dst); | |
119 | effective_length = ((unsigned) len < dst_len) ? len : dst_len; | |
120 | memmove (dst_ptr + start, src, effective_length); | |
ee2a8b9b JB |
121 | scm_unprotect_object (dst); |
122 | } | |
123 | ||
124 | /* Return the symbol named SYMBOL_STR. */ | |
125 | SCM | |
4921140c | 126 | gh_symbol2scm (const char *symbol_str) |
ee2a8b9b JB |
127 | { |
128 | return SCM_CAR (scm_intern (symbol_str, strlen (symbol_str))); | |
129 | } | |
130 | ||
b774ee1f MD |
131 | SCM |
132 | gh_ints2scm (int *d, int n) | |
133 | { | |
b774ee1f | 134 | int i; |
0acef67a JB |
135 | SCM v = scm_make_vector(SCM_MAKINUM(n), SCM_UNSPECIFIED); |
136 | SCM *velts = SCM_VELTS(v); | |
137 | ||
b774ee1f | 138 | for (i = 0; i < n; ++i) |
0acef67a JB |
139 | velts[i] = (d[i] >= SCM_MOST_NEGATIVE_FIXNUM |
140 | && d[i] <= SCM_MOST_POSITIVE_FIXNUM | |
141 | ? SCM_MAKINUM (d[i]) | |
142 | : scm_long2big (d[i])); | |
143 | return v; | |
3ffc7a36 MD |
144 | } |
145 | ||
146 | SCM | |
147 | gh_doubles2scm (double *d, int n) | |
148 | { | |
3ffc7a36 | 149 | int i; |
0acef67a JB |
150 | SCM v = scm_make_vector(SCM_MAKINUM(n), SCM_UNSPECIFIED); |
151 | SCM *velts = SCM_VELTS(v); | |
152 | ||
153 | for(i = 0; i < n; i++) | |
154 | velts[i] = scm_makdbl(d[i], 0.0); | |
155 | return v; | |
156 | } | |
157 | ||
afe5177e | 158 | #ifdef HAVE_ARRAYS |
0acef67a JB |
159 | /* Do not use this function for building normal Scheme vectors, unless |
160 | you arrange for the elements to be protected from GC while you | |
161 | initialize the vector. */ | |
162 | static SCM | |
163 | makvect (char* m, int len, int type) | |
164 | { | |
165 | SCM ans; | |
166 | SCM_NEWCELL (ans); | |
167 | SCM_DEFER_INTS; | |
168 | SCM_SETCHARS (ans, m); | |
169 | SCM_SETLENGTH (ans, len, type); | |
170 | SCM_ALLOW_INTS; | |
171 | return ans; | |
b774ee1f MD |
172 | } |
173 | ||
3ffc7a36 MD |
174 | SCM |
175 | gh_chars2byvect (char *d, int n) | |
176 | { | |
177 | char *m = scm_must_malloc (n * sizeof (char), "vector"); | |
178 | memcpy (m, d, n * sizeof (char)); | |
179 | return makvect (m, n, scm_tc7_byvect); | |
180 | } | |
181 | ||
182 | SCM | |
183 | gh_shorts2svect (short *d, int n) | |
184 | { | |
185 | char *m = scm_must_malloc (n * sizeof (short), "vector"); | |
186 | memcpy (m, d, n * sizeof (short)); | |
187 | return makvect (m, n, scm_tc7_svect); | |
188 | } | |
189 | ||
b774ee1f MD |
190 | SCM |
191 | gh_longs2ivect (long *d, int n) | |
192 | { | |
193 | char *m = scm_must_malloc (n * sizeof (long), "vector"); | |
194 | memcpy (m, d, n * sizeof (long)); | |
195 | return makvect (m, n, scm_tc7_ivect); | |
196 | } | |
197 | ||
198 | SCM | |
199 | gh_ulongs2uvect (unsigned long *d, int n) | |
200 | { | |
201 | char *m = scm_must_malloc (n * sizeof (unsigned long), "vector"); | |
202 | memcpy (m, d, n * sizeof (unsigned long)); | |
203 | return makvect (m, n, scm_tc7_uvect); | |
204 | } | |
205 | ||
206 | SCM | |
3ffc7a36 | 207 | gh_floats2fvect (float *d, int n) |
b774ee1f | 208 | { |
3ffc7a36 MD |
209 | char *m = scm_must_malloc (n * sizeof (float), "vector"); |
210 | memcpy (m, d, n * sizeof (float)); | |
211 | return makvect (m, n, scm_tc7_fvect); | |
b774ee1f MD |
212 | } |
213 | ||
f3a2c4cf MD |
214 | SCM |
215 | gh_doubles2dvect (double *d, int n) | |
216 | { | |
f3a2c4cf MD |
217 | char *m = scm_must_malloc (n * sizeof (double), "vector"); |
218 | memcpy (m, d, n * sizeof (double)); | |
b774ee1f | 219 | return makvect (m, n, scm_tc7_dvect); |
f3a2c4cf MD |
220 | } |
221 | #endif | |
ee2a8b9b JB |
222 | |
223 | /* data conversion scheme->C */ | |
224 | int | |
225 | gh_scm2bool (SCM obj) | |
226 | { | |
fbd485ba | 227 | return (SCM_FALSEP (obj)) ? 0 : 1; |
ee2a8b9b JB |
228 | } |
229 | unsigned long | |
230 | gh_scm2ulong (SCM obj) | |
231 | { | |
232 | return scm_num2ulong (obj, (char *) SCM_ARG1, "gh_scm2ulong"); | |
233 | } | |
234 | long | |
235 | gh_scm2long (SCM obj) | |
236 | { | |
237 | return scm_num2long (obj, (char *) SCM_ARG1, "gh_scm2long"); | |
238 | } | |
239 | int | |
240 | gh_scm2int (SCM obj) | |
241 | { | |
242 | /* NOTE: possible loss of precision here */ | |
243 | return (int) scm_num2long (obj, (char *) SCM_ARG1, "gh_scm2int"); | |
244 | } | |
245 | double | |
246 | gh_scm2double (SCM obj) | |
247 | { | |
248 | return scm_num2dbl (obj, "gh_scm2double"); | |
249 | } | |
250 | char | |
251 | gh_scm2char (SCM obj) | |
252 | { | |
7866a09b | 253 | return SCM_CHAR (obj); |
ee2a8b9b JB |
254 | } |
255 | ||
3ffc7a36 MD |
256 | /* Convert a vector, weak vector, string, substring or uniform vector |
257 | into an array of chars. If result array in arg 2 is NULL, malloc a | |
258 | new one. */ | |
259 | char * | |
260 | gh_scm2chars (SCM obj, char *m) | |
f3a2c4cf MD |
261 | { |
262 | int i, n; | |
3ffc7a36 | 263 | long v; |
f3a2c4cf MD |
264 | SCM val; |
265 | if (!SCM_NIMP (obj)) | |
266 | scm_wrong_type_arg (0, 0, obj); | |
267 | switch (SCM_TYP7 (obj)) | |
268 | { | |
269 | case scm_tc7_vector: | |
270 | case scm_tc7_wvect: | |
271 | n = SCM_LENGTH (obj); | |
f3a2c4cf MD |
272 | for (i = 0; i < n; ++i) |
273 | { | |
274 | val = SCM_VELTS (obj)[i]; | |
275 | if (SCM_INUMP (val)) | |
3ffc7a36 MD |
276 | { |
277 | v = SCM_INUM (val); | |
278 | if (v < -128 || v > 255) | |
279 | scm_out_of_range (0, obj); | |
280 | } | |
f3a2c4cf | 281 | else |
3ffc7a36 MD |
282 | scm_wrong_type_arg (0, 0, obj); |
283 | } | |
284 | if (m == 0) | |
285 | m = (char *) malloc (n * sizeof (char)); | |
286 | for (i = 0; i < n; ++i) | |
287 | m[i] = SCM_INUM (SCM_VELTS (obj)[i]); | |
288 | break; | |
afe5177e | 289 | #ifdef HAVE_ARRAYS |
3ffc7a36 | 290 | case scm_tc7_byvect: |
afe5177e | 291 | #endif |
3ffc7a36 MD |
292 | case scm_tc7_string: |
293 | case scm_tc7_substring: | |
294 | n = SCM_LENGTH (obj); | |
295 | if (m == 0) | |
296 | m = (char *) malloc (n * sizeof (char)); | |
297 | memcpy (m, SCM_VELTS (obj), n * sizeof (char)); | |
298 | break; | |
299 | default: | |
300 | scm_wrong_type_arg (0, 0, obj); | |
301 | } | |
302 | return m; | |
303 | } | |
304 | ||
305 | /* Convert a vector, weak vector or uniform vector into an array of | |
306 | shorts. If result array in arg 2 is NULL, malloc a new one. */ | |
307 | short * | |
308 | gh_scm2shorts (SCM obj, short *m) | |
309 | { | |
310 | int i, n; | |
311 | long v; | |
312 | SCM val; | |
313 | if (!SCM_NIMP (obj)) | |
314 | scm_wrong_type_arg (0, 0, obj); | |
315 | switch (SCM_TYP7 (obj)) | |
316 | { | |
317 | case scm_tc7_vector: | |
318 | case scm_tc7_wvect: | |
319 | n = SCM_LENGTH (obj); | |
320 | for (i = 0; i < n; ++i) | |
321 | { | |
322 | val = SCM_VELTS (obj)[i]; | |
323 | if (SCM_INUMP (val)) | |
f3a2c4cf | 324 | { |
3ffc7a36 MD |
325 | v = SCM_INUM (val); |
326 | if (v < -32768 || v > 65535) | |
327 | scm_out_of_range (0, obj); | |
f3a2c4cf | 328 | } |
3ffc7a36 MD |
329 | else |
330 | scm_wrong_type_arg (0, 0, obj); | |
331 | } | |
332 | if (m == 0) | |
333 | m = (short *) malloc (n * sizeof (short)); | |
334 | for (i = 0; i < n; ++i) | |
335 | m[i] = SCM_INUM (SCM_VELTS (obj)[i]); | |
336 | break; | |
afe5177e | 337 | #ifdef HAVE_ARRAYS |
3ffc7a36 MD |
338 | case scm_tc7_svect: |
339 | n = SCM_LENGTH (obj); | |
340 | if (m == 0) | |
341 | m = (short *) malloc (n * sizeof (short)); | |
342 | memcpy (m, SCM_VELTS (obj), n * sizeof (short)); | |
343 | break; | |
afe5177e | 344 | #endif |
3ffc7a36 MD |
345 | default: |
346 | scm_wrong_type_arg (0, 0, obj); | |
347 | } | |
348 | return m; | |
349 | } | |
350 | ||
351 | /* Convert a vector, weak vector or uniform vector into an array of | |
352 | longs. If result array in arg 2 is NULL, malloc a new one. */ | |
353 | long * | |
354 | gh_scm2longs (SCM obj, long *m) | |
355 | { | |
356 | int i, n; | |
357 | SCM val; | |
358 | if (!SCM_NIMP (obj)) | |
359 | scm_wrong_type_arg (0, 0, obj); | |
360 | switch (SCM_TYP7 (obj)) | |
361 | { | |
362 | case scm_tc7_vector: | |
363 | case scm_tc7_wvect: | |
364 | n = SCM_LENGTH (obj); | |
365 | for (i = 0; i < n; ++i) | |
366 | { | |
367 | val = SCM_VELTS (obj)[i]; | |
0c95b57d | 368 | if (!SCM_INUMP (val) && !SCM_BIGP (val)) |
3ffc7a36 MD |
369 | scm_wrong_type_arg (0, 0, obj); |
370 | } | |
371 | if (m == 0) | |
372 | m = (long *) malloc (n * sizeof (long)); | |
373 | for (i = 0; i < n; ++i) | |
374 | { | |
375 | val = SCM_VELTS (obj)[i]; | |
376 | m[i] = SCM_INUMP (val) ? SCM_INUM (val) : scm_num2long (val, 0, 0); | |
377 | } | |
378 | break; | |
afe5177e | 379 | #ifdef HAVE_ARRAYS |
3ffc7a36 MD |
380 | case scm_tc7_ivect: |
381 | case scm_tc7_uvect: | |
382 | n = SCM_LENGTH (obj); | |
383 | if (m == 0) | |
384 | m = (long *) malloc (n * sizeof (long)); | |
385 | memcpy (m, SCM_VELTS (obj), n * sizeof (long)); | |
386 | break; | |
afe5177e | 387 | #endif |
3ffc7a36 MD |
388 | default: |
389 | scm_wrong_type_arg (0, 0, obj); | |
390 | } | |
391 | return m; | |
392 | } | |
393 | ||
394 | /* Convert a vector, weak vector or uniform vector into an array of | |
395 | floats. If result array in arg 2 is NULL, malloc a new one. */ | |
396 | float * | |
397 | gh_scm2floats (SCM obj, float *m) | |
398 | { | |
399 | int i, n; | |
400 | SCM val; | |
401 | if (!SCM_NIMP (obj)) | |
402 | scm_wrong_type_arg (0, 0, obj); | |
403 | switch (SCM_TYP7 (obj)) | |
404 | { | |
405 | case scm_tc7_vector: | |
406 | case scm_tc7_wvect: | |
407 | n = SCM_LENGTH (obj); | |
408 | for (i = 0; i < n; ++i) | |
409 | { | |
410 | val = SCM_VELTS (obj)[i]; | |
411 | if (!SCM_INUMP (val) | |
0c95b57d | 412 | && !(SCM_BIGP (val) || SCM_REALP (val))) |
3ffc7a36 MD |
413 | scm_wrong_type_arg (0, 0, val); |
414 | } | |
415 | if (m == 0) | |
416 | m = (float *) malloc (n * sizeof (float)); | |
417 | for (i = 0; i < n; ++i) | |
418 | { | |
419 | val = SCM_VELTS (obj)[i]; | |
420 | if (SCM_INUMP (val)) | |
421 | m[i] = SCM_INUM (val); | |
422 | else if (SCM_BIGP (val)) | |
423 | m[i] = scm_num2long (val, 0, 0); | |
424 | else | |
425 | m[i] = SCM_REALPART (val); | |
f3a2c4cf MD |
426 | } |
427 | break; | |
afe5177e | 428 | #ifdef HAVE_ARRAYS |
f3a2c4cf MD |
429 | case scm_tc7_fvect: |
430 | n = SCM_LENGTH (obj); | |
3ffc7a36 MD |
431 | if (m == 0) |
432 | m = (float *) malloc (n * sizeof (float)); | |
433 | memcpy (m, (float *) SCM_VELTS (obj), n * sizeof (float)); | |
f3a2c4cf | 434 | break; |
16d35552 | 435 | |
f3a2c4cf MD |
436 | case scm_tc7_dvect: |
437 | n = SCM_LENGTH (obj); | |
3ffc7a36 MD |
438 | if (m == 0) |
439 | m = (float*) malloc (n * sizeof (float)); | |
f3a2c4cf | 440 | for (i = 0; i < n; ++i) |
3ffc7a36 MD |
441 | m[i] = ((double *) SCM_VELTS (obj))[i]; |
442 | break; | |
443 | #endif | |
444 | default: | |
445 | scm_wrong_type_arg (0, 0, obj); | |
446 | } | |
447 | return m; | |
448 | } | |
449 | ||
450 | /* Convert a vector, weak vector or uniform vector into an array of | |
451 | doubles. If result array in arg 2 is NULL, malloc a new one. */ | |
452 | double * | |
453 | gh_scm2doubles (SCM obj, double *m) | |
454 | { | |
455 | int i, n; | |
456 | SCM val; | |
457 | if (!SCM_NIMP (obj)) | |
458 | scm_wrong_type_arg (0, 0, obj); | |
459 | switch (SCM_TYP7 (obj)) | |
460 | { | |
461 | case scm_tc7_vector: | |
462 | case scm_tc7_wvect: | |
463 | n = SCM_LENGTH (obj); | |
464 | for (i = 0; i < n; ++i) | |
465 | { | |
466 | val = SCM_VELTS (obj)[i]; | |
467 | if (!SCM_INUMP (val) | |
0c95b57d | 468 | && !(SCM_BIGP (val) || SCM_REALP (val))) |
3ffc7a36 MD |
469 | scm_wrong_type_arg (0, 0, val); |
470 | } | |
471 | if (m == 0) | |
472 | m = (double *) malloc (n * sizeof (double)); | |
473 | for (i = 0; i < n; ++i) | |
474 | { | |
475 | val = SCM_VELTS (obj)[i]; | |
476 | if (SCM_INUMP (val)) | |
477 | m[i] = SCM_INUM (val); | |
478 | else if (SCM_BIGP (val)) | |
479 | m[i] = scm_num2long (val, 0, 0); | |
480 | else | |
481 | m[i] = SCM_REALPART (val); | |
482 | } | |
483 | break; | |
afe5177e | 484 | #ifdef HAVE_ARRAYS |
3ffc7a36 MD |
485 | case scm_tc7_fvect: |
486 | n = SCM_LENGTH (obj); | |
487 | if (m == 0) | |
488 | m = (double *) malloc (n * sizeof (double)); | |
489 | for (i = 0; i < n; ++i) | |
490 | m[i] = ((float *) SCM_VELTS (obj))[i]; | |
491 | break; | |
16d35552 | 492 | |
3ffc7a36 MD |
493 | case scm_tc7_dvect: |
494 | n = SCM_LENGTH (obj); | |
495 | if (m == 0) | |
496 | m = (double*) malloc (n * sizeof (double)); | |
497 | memcpy (m, SCM_VELTS (obj), n * sizeof (double)); | |
f3a2c4cf MD |
498 | break; |
499 | #endif | |
500 | default: | |
501 | scm_wrong_type_arg (0, 0, obj); | |
502 | } | |
503 | return m; | |
504 | } | |
505 | ||
ee2a8b9b JB |
506 | /* string conversions between C and Scheme */ |
507 | ||
508 | /* gh_scm2newstr() -- Given a Scheme string STR, return a pointer to a | |
509 | new copy of its contents, followed by a null byte. If lenp is | |
510 | non-null, set *lenp to the string's length. | |
511 | ||
512 | This function uses malloc to obtain storage for the copy; the | |
513 | caller is responsible for freeing it. | |
514 | ||
515 | Note that Scheme strings may contain arbitrary data, including null | |
516 | characters. This means that null termination is not a reliable way | |
517 | to determine the length of the returned value. However, the | |
518 | function always copies the complete contents of STR, and sets | |
519 | *LEN_P to the true length of the string (when LEN_P is non-null). */ | |
520 | char * | |
521 | gh_scm2newstr (SCM str, int *lenp) | |
522 | { | |
523 | char *ret_str; | |
524 | int len; | |
525 | ||
0c95b57d | 526 | SCM_ASSERT (SCM_ROSTRINGP (str), str, SCM_ARG3, |
ee2a8b9b JB |
527 | "gh_scm2newstr"); |
528 | ||
529 | /* protect str from GC while we copy off its data */ | |
530 | scm_protect_object (str); | |
531 | ||
532 | len = SCM_LENGTH (str); | |
533 | ||
9b1b00fe JB |
534 | ret_str = (char *) scm_must_malloc ((len + 1) * sizeof (char), |
535 | "gh_scm2newstr"); | |
ee2a8b9b | 536 | /* so we copy tmp_str to ret_str, which is what we will allocate */ |
66d1e129 | 537 | memcpy (ret_str, SCM_ROCHARS (str), len); /* test ROCHARS here -twp */ |
ee2a8b9b JB |
538 | /* now make sure we null-terminate it */ |
539 | ret_str[len] = '\0'; | |
540 | ||
541 | scm_unprotect_object (str); | |
542 | ||
543 | if (lenp != NULL) | |
544 | { | |
545 | *lenp = len; | |
546 | } | |
547 | ||
548 | return ret_str; | |
549 | } | |
550 | ||
551 | ||
552 | /* Copy LEN characters at START from the Scheme string SRC to memory | |
553 | at DST. START is an index into SRC; zero means the beginning of | |
554 | the string. DST has already been allocated by the caller. | |
555 | ||
556 | If START + LEN is off the end of SRC, silently truncate the source | |
557 | region to fit the string. If truncation occurs, the corresponding | |
558 | area of DST is left unchanged. */ | |
559 | void | |
560 | gh_get_substr (SCM src, char *dst, int start, int len) | |
561 | { | |
562 | int src_len, effective_length; | |
0c95b57d | 563 | SCM_ASSERT (SCM_ROSTRINGP (src), src, SCM_ARG3, |
ee2a8b9b JB |
564 | "gh_get_substr"); |
565 | ||
566 | scm_protect_object (src); | |
567 | src_len = SCM_LENGTH (src); | |
568 | effective_length = (len < src_len) ? len : src_len; | |
66d1e129 | 569 | memcpy (dst + start, SCM_ROCHARS (src), effective_length * sizeof (char)); |
ee2a8b9b JB |
570 | /* FIXME: must signal an error if len > src_len */ |
571 | scm_unprotect_object (src); | |
572 | } | |
573 | ||
574 | ||
575 | /* gh_scm2newsymbol() -- Given a Scheme symbol 'identifier, return a | |
576 | pointer to a string with the symbol characters "identifier", | |
577 | followed by a null byte. If lenp is non-null, set *lenp to the | |
578 | string's length. | |
579 | ||
580 | This function uses malloc to obtain storage for the copy; the | |
581 | caller is responsible for freeing it. */ | |
582 | char * | |
583 | gh_symbol2newstr (SCM sym, int *lenp) | |
584 | { | |
585 | char *ret_str; | |
586 | int len; | |
587 | ||
0c95b57d | 588 | SCM_ASSERT (SCM_SYMBOLP (sym), sym, SCM_ARG3, |
ee2a8b9b JB |
589 | "gh_scm2newsymbol"); |
590 | ||
591 | /* protect str from GC while we copy off its data */ | |
592 | scm_protect_object (sym); | |
593 | ||
594 | len = SCM_LENGTH (sym); | |
595 | ||
9b1b00fe JB |
596 | ret_str = (char *) scm_must_malloc ((len + 1) * sizeof (char), |
597 | "gh_symbol2newstr"); | |
ee2a8b9b JB |
598 | /* so we copy tmp_str to ret_str, which is what we will allocate */ |
599 | memcpy (ret_str, SCM_CHARS (sym), len); | |
600 | /* now make sure we null-terminate it */ | |
601 | ret_str[len] = '\0'; | |
602 | ||
603 | scm_unprotect_object (sym); | |
604 | ||
605 | if (lenp != NULL) | |
606 | { | |
607 | *lenp = len; | |
608 | } | |
609 | ||
610 | return ret_str; | |
611 | } | |
612 | ||
613 | ||
614 | /* create a new vector of the given length, all initialized to the | |
615 | given value */ | |
e5eece74 MG |
616 | SCM |
617 | gh_make_vector (SCM len, SCM fill) | |
ee2a8b9b | 618 | { |
a8741caa | 619 | return scm_make_vector (len, fill); |
ee2a8b9b JB |
620 | } |
621 | ||
622 | /* set the given element of the given vector to the given value */ | |
623 | SCM | |
956328d2 | 624 | gh_vector_set_x (SCM vec, SCM pos, SCM val) |
ee2a8b9b JB |
625 | { |
626 | return scm_vector_set_x (vec, pos, val); | |
627 | } | |
628 | ||
629 | /* retrieve the given element of the given vector */ | |
630 | SCM | |
e5eece74 | 631 | gh_vector_ref (SCM vec, SCM pos) |
ee2a8b9b JB |
632 | { |
633 | return scm_vector_ref (vec, pos); | |
634 | } | |
635 | ||
636 | /* returns the length of the given vector */ | |
637 | unsigned long | |
638 | gh_vector_length (SCM v) | |
639 | { | |
640 | return gh_scm2ulong (scm_vector_length (v)); | |
641 | } | |
35379308 | 642 | |
afe5177e | 643 | #ifdef HAVE_ARRAYS |
ef5d3ae1 MG |
644 | /* uniform vector support */ |
645 | ||
646 | /* returns the length as a C unsigned long integer */ | |
647 | unsigned long | |
648 | gh_uniform_vector_length (SCM v) | |
649 | { | |
650 | return gh_scm2ulong (scm_uniform_vector_length (v)); | |
651 | } | |
652 | ||
653 | /* gets the given element from a uniform vector; ilist is a list (or | |
654 | possibly a single integer) of indices, and its length is the | |
655 | dimension of the uniform vector */ | |
656 | SCM | |
657 | gh_uniform_vector_ref (SCM v, SCM ilist) | |
658 | { | |
659 | return scm_uniform_vector_ref (v, ilist); | |
660 | } | |
661 | ||
662 | /* sets an individual element in a uniform vector */ | |
663 | /* SCM */ | |
664 | /* gh_list_to_uniform_array ( */ | |
afe5177e | 665 | #endif |
ef5d3ae1 | 666 | |
35379308 JB |
667 | /* Data lookups between C and Scheme |
668 | ||
669 | Look up a symbol with a given name, and return the object to which | |
670 | it is bound. gh_lookup examines the Guile top level, and | |
671 | gh_module_lookup checks the module namespace specified by the | |
672 | `vec' argument. | |
673 | ||
674 | The return value is the Scheme object to which SNAME is bound, or | |
675 | SCM_UNDEFINED if SNAME is not bound in the given context. [FIXME: | |
676 | should this be SCM_UNSPECIFIED? Can a symbol ever legitimately be | |
677 | bound to SCM_UNDEFINED or SCM_UNSPECIFIED? What is the difference? | |
678 | -twp] */ | |
679 | ||
680 | SCM | |
681 | gh_lookup (char *sname) | |
682 | { | |
683 | return gh_module_lookup (SCM_BOOL_F, sname); | |
684 | } | |
685 | ||
686 | SCM | |
687 | gh_module_lookup (SCM vec, char *sname) | |
688 | { | |
689 | SCM sym = gh_symbol2scm (sname); | |
fbd485ba | 690 | if (SCM_TRUE_P (scm_symbol_bound_p (vec, sym))) |
35379308 JB |
691 | return scm_symbol_binding (vec, sym); |
692 | else | |
693 | return SCM_UNDEFINED; | |
694 | } | |
89e00824 ML |
695 | |
696 | /* | |
697 | Local Variables: | |
698 | c-file-style: "gnu" | |
699 | End: | |
700 | */ |