Commit | Line | Data |
---|---|---|
1e598865 | 1 | /* Copyright (C) 1995,1996,1997 Free Software Foundation, Inc. |
ee2a8b9b JB |
2 | |
3 | * This program is free software; you can redistribute it and/or modify | |
4 | * it under the terms of the GNU General Public License as published by | |
5 | * the Free Software Foundation; either version 2, or (at your option) | |
6 | * any later version. | |
7 | * | |
8 | * This program is distributed in the hope that it will be useful, | |
9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
11 | * GNU General Public License for more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public License | |
14 | * along with this software; see the file COPYING. If not, write to | |
82892bed JB |
15 | * the Free Software Foundation, Inc., 59 Temple Place, Suite 330, |
16 | * Boston, MA 02111-1307 USA | |
ee2a8b9b JB |
17 | * |
18 | * As a special exception, the Free Software Foundation gives permission | |
19 | * for additional uses of the text contained in its release of GUILE. | |
20 | * | |
21 | * The exception is that, if you link the GUILE library with other files | |
22 | * to produce an executable, this does not by itself cause the | |
23 | * resulting executable to be covered by the GNU General Public License. | |
24 | * Your use of that executable is in no way restricted on account of | |
25 | * linking the GUILE library code into it. | |
26 | * | |
27 | * This exception does not however invalidate any other reasons why | |
28 | * the executable file might be covered by the GNU General Public License. | |
29 | * | |
30 | * This exception applies only to the code released by the | |
31 | * Free Software Foundation under the name GUILE. If you copy | |
32 | * code from other Free Software Foundation releases into a copy of | |
33 | * GUILE, as the General Public License permits, the exception does | |
34 | * not apply to the code that you add in this way. To avoid misleading | |
35 | * anyone as to the status of such modified files, you must delete | |
36 | * this exception notice from them. | |
37 | * | |
38 | * If you write modifications of your own for GUILE, it is your choice | |
39 | * whether to permit this exception to apply to your modifications. | |
82892bed | 40 | * If you do not wish that, delete this exception notice. */ |
ee2a8b9b JB |
41 | \f |
42 | ||
43 | /* data initialization and C<->Scheme data conversion */ | |
44 | ||
45 | #include <stdio.h> | |
46 | ||
47 | #include <gh.h> | |
48 | ||
49 | /* data conversion C->scheme */ | |
50 | SCM | |
dbb3005d MG |
51 | gh_int2scmb (int x) /* this is being phased out */ |
52 | { | |
53 | return (x ? SCM_BOOL_T : SCM_BOOL_F); | |
54 | } | |
55 | SCM | |
56 | gh_bool2scm (int x) | |
ee2a8b9b JB |
57 | { |
58 | return (x ? SCM_BOOL_T : SCM_BOOL_F); | |
59 | } | |
60 | SCM | |
61 | gh_int2scm (int x) | |
62 | { | |
63 | return scm_long2num ((long) x); | |
64 | } | |
65 | SCM | |
66 | gh_ulong2scm (unsigned long x) | |
67 | { | |
68 | return scm_ulong2num (x); | |
69 | } | |
70 | SCM | |
71 | gh_long2scm (long x) | |
72 | { | |
73 | return scm_long2num (x); | |
74 | } | |
75 | SCM | |
76 | gh_double2scm (double x) | |
77 | { | |
78 | return scm_makdbl (x, 0.0); | |
79 | } | |
80 | SCM | |
81 | gh_char2scm (char c) | |
82 | { | |
2c92112b | 83 | return SCM_MAKICHR (c); |
ee2a8b9b JB |
84 | } |
85 | SCM | |
86 | gh_str2scm (char *s, int len) | |
87 | { | |
88 | return scm_makfromstr (s, len, 0); | |
89 | } | |
90 | SCM | |
91 | gh_str02scm (char *s) | |
92 | { | |
93 | return scm_makfrom0str (s); | |
94 | } | |
95 | /* Copy LEN characters at SRC into the *existing* Scheme string DST, | |
96 | starting at START. START is an index into DST; zero means the | |
97 | beginning of the string. | |
98 | ||
99 | If START + LEN is off the end of DST, signal an out-of-range | |
100 | error. */ | |
101 | void | |
102 | gh_set_substr (char *src, SCM dst, int start, int len) | |
103 | { | |
2c92112b AG |
104 | char *dst_ptr; |
105 | unsigned long dst_len, effective_length; | |
ee2a8b9b JB |
106 | |
107 | SCM_ASSERT (SCM_NIMP (dst) && SCM_STRINGP (dst), dst, SCM_ARG3, | |
108 | "gh_set_substr"); | |
109 | scm_protect_object (dst); | |
110 | dst_ptr = SCM_CHARS (dst); | |
111 | dst_len = SCM_LENGTH (dst); | |
112 | effective_length = (len < dst_len) ? len : dst_len; | |
113 | memcpy (dst_ptr + start, src, effective_length); | |
114 | /* FIXME: must signal an error if len > dst_len */ | |
115 | scm_unprotect_object (dst); | |
116 | } | |
117 | ||
118 | /* Return the symbol named SYMBOL_STR. */ | |
119 | SCM | |
120 | gh_symbol2scm (char *symbol_str) | |
121 | { | |
122 | return SCM_CAR (scm_intern (symbol_str, strlen (symbol_str))); | |
123 | } | |
124 | ||
f3a2c4cf MD |
125 | SCM |
126 | gh_doubles2scm (double *d, int n) | |
127 | { | |
128 | SCM ans; | |
129 | SCM *m = (SCM*) scm_must_malloc (n * sizeof (SCM), "vector"); | |
130 | int i; | |
131 | for (i = 0; i < n; ++i) | |
132 | m[i] = scm_makdbl (d[i], 0.0); | |
133 | SCM_NEWCELL (ans); | |
134 | SCM_DEFER_INTS; | |
135 | SCM_SETCHARS (ans, m); | |
136 | SCM_SETLENGTH (ans, n, scm_tc7_vector); | |
137 | SCM_ALLOW_INTS; | |
138 | return ans; | |
139 | } | |
140 | ||
141 | #ifdef SCM_FLOATS | |
142 | SCM | |
143 | gh_doubles2dvect (double *d, int n) | |
144 | { | |
145 | SCM ans; | |
146 | char *m = scm_must_malloc (n * sizeof (double), "vector"); | |
147 | memcpy (m, d, n * sizeof (double)); | |
148 | SCM_NEWCELL (ans); | |
149 | SCM_DEFER_INTS; | |
150 | SCM_SETCHARS (ans, m); | |
151 | SCM_SETLENGTH (ans, n, scm_tc7_dvect); | |
152 | SCM_ALLOW_INTS; | |
153 | return ans; | |
154 | } | |
155 | #endif | |
ee2a8b9b JB |
156 | |
157 | /* data conversion scheme->C */ | |
158 | int | |
159 | gh_scm2bool (SCM obj) | |
160 | { | |
161 | return ((obj) == SCM_BOOL_F) ? 0 : 1; | |
162 | } | |
163 | unsigned long | |
164 | gh_scm2ulong (SCM obj) | |
165 | { | |
166 | return scm_num2ulong (obj, (char *) SCM_ARG1, "gh_scm2ulong"); | |
167 | } | |
168 | long | |
169 | gh_scm2long (SCM obj) | |
170 | { | |
171 | return scm_num2long (obj, (char *) SCM_ARG1, "gh_scm2long"); | |
172 | } | |
173 | int | |
174 | gh_scm2int (SCM obj) | |
175 | { | |
176 | /* NOTE: possible loss of precision here */ | |
177 | return (int) scm_num2long (obj, (char *) SCM_ARG1, "gh_scm2int"); | |
178 | } | |
179 | double | |
180 | gh_scm2double (SCM obj) | |
181 | { | |
182 | return scm_num2dbl (obj, "gh_scm2double"); | |
183 | } | |
184 | char | |
185 | gh_scm2char (SCM obj) | |
186 | { | |
187 | return SCM_ICHR (obj); | |
188 | } | |
189 | ||
f3a2c4cf MD |
190 | /* Convert a vector, weak vector or uniform vector into a malloced |
191 | array of doubles. */ | |
192 | double* | |
193 | gh_scm2doubles (SCM obj) | |
194 | { | |
195 | int i, n; | |
196 | double *m; | |
197 | SCM val; | |
198 | if (!SCM_NIMP (obj)) | |
199 | scm_wrong_type_arg (0, 0, obj); | |
200 | switch (SCM_TYP7 (obj)) | |
201 | { | |
202 | case scm_tc7_vector: | |
203 | case scm_tc7_wvect: | |
204 | n = SCM_LENGTH (obj); | |
205 | m = (double*) malloc (n * sizeof (double)); | |
206 | for (i = 0; i < n; ++i) | |
207 | { | |
208 | val = SCM_VELTS (obj)[i]; | |
209 | if (SCM_INUMP (val)) | |
210 | m[i] = SCM_INUM (val); | |
211 | else if (SCM_NIMP (val) && SCM_REALP (val)) | |
212 | m[i] = SCM_REALPART (val); | |
213 | else | |
214 | { | |
215 | free (m); | |
216 | scm_wrong_type_arg (0, 0, val); | |
217 | } | |
218 | } | |
219 | break; | |
220 | #ifdef SCM_FLOATS | |
221 | #ifdef SCM_SINGLES | |
222 | case scm_tc7_fvect: | |
223 | n = SCM_LENGTH (obj); | |
224 | m = (double*) malloc (n * sizeof (double)); | |
225 | for (i = 0; i < n; ++i) | |
226 | m[i] = ((float*) SCM_VELTS (obj))[i]; | |
227 | break; | |
228 | #endif | |
229 | case scm_tc7_dvect: | |
230 | n = SCM_LENGTH (obj); | |
231 | m = (double*) malloc (n * sizeof (double)); | |
232 | for (i = 0; i < n; ++i) | |
233 | m[i] = ((double*) SCM_VELTS (obj))[i]; | |
234 | break; | |
235 | #endif | |
236 | default: | |
237 | scm_wrong_type_arg (0, 0, obj); | |
238 | } | |
239 | return m; | |
240 | } | |
241 | ||
ee2a8b9b JB |
242 | /* string conversions between C and Scheme */ |
243 | ||
244 | /* gh_scm2newstr() -- Given a Scheme string STR, return a pointer to a | |
245 | new copy of its contents, followed by a null byte. If lenp is | |
246 | non-null, set *lenp to the string's length. | |
247 | ||
248 | This function uses malloc to obtain storage for the copy; the | |
249 | caller is responsible for freeing it. | |
250 | ||
251 | Note that Scheme strings may contain arbitrary data, including null | |
252 | characters. This means that null termination is not a reliable way | |
253 | to determine the length of the returned value. However, the | |
254 | function always copies the complete contents of STR, and sets | |
255 | *LEN_P to the true length of the string (when LEN_P is non-null). */ | |
256 | char * | |
257 | gh_scm2newstr (SCM str, int *lenp) | |
258 | { | |
259 | char *ret_str; | |
260 | int len; | |
261 | ||
66d1e129 | 262 | SCM_ASSERT (SCM_NIMP (str) && SCM_ROSTRINGP (str), str, SCM_ARG3, |
ee2a8b9b JB |
263 | "gh_scm2newstr"); |
264 | ||
265 | /* protect str from GC while we copy off its data */ | |
266 | scm_protect_object (str); | |
267 | ||
268 | len = SCM_LENGTH (str); | |
269 | ||
9b1b00fe JB |
270 | ret_str = (char *) scm_must_malloc ((len + 1) * sizeof (char), |
271 | "gh_scm2newstr"); | |
ee2a8b9b | 272 | /* so we copy tmp_str to ret_str, which is what we will allocate */ |
66d1e129 | 273 | memcpy (ret_str, SCM_ROCHARS (str), len); /* test ROCHARS here -twp */ |
ee2a8b9b JB |
274 | /* now make sure we null-terminate it */ |
275 | ret_str[len] = '\0'; | |
276 | ||
277 | scm_unprotect_object (str); | |
278 | ||
279 | if (lenp != NULL) | |
280 | { | |
281 | *lenp = len; | |
282 | } | |
283 | ||
284 | return ret_str; | |
285 | } | |
286 | ||
287 | ||
288 | /* Copy LEN characters at START from the Scheme string SRC to memory | |
289 | at DST. START is an index into SRC; zero means the beginning of | |
290 | the string. DST has already been allocated by the caller. | |
291 | ||
292 | If START + LEN is off the end of SRC, silently truncate the source | |
293 | region to fit the string. If truncation occurs, the corresponding | |
294 | area of DST is left unchanged. */ | |
295 | void | |
296 | gh_get_substr (SCM src, char *dst, int start, int len) | |
297 | { | |
298 | int src_len, effective_length; | |
66d1e129 | 299 | SCM_ASSERT (SCM_NIMP (src) && SCM_ROSTRINGP (src), src, SCM_ARG3, |
ee2a8b9b JB |
300 | "gh_get_substr"); |
301 | ||
302 | scm_protect_object (src); | |
303 | src_len = SCM_LENGTH (src); | |
304 | effective_length = (len < src_len) ? len : src_len; | |
66d1e129 | 305 | memcpy (dst + start, SCM_ROCHARS (src), effective_length * sizeof (char)); |
ee2a8b9b JB |
306 | /* FIXME: must signal an error if len > src_len */ |
307 | scm_unprotect_object (src); | |
308 | } | |
309 | ||
310 | ||
311 | /* gh_scm2newsymbol() -- Given a Scheme symbol 'identifier, return a | |
312 | pointer to a string with the symbol characters "identifier", | |
313 | followed by a null byte. If lenp is non-null, set *lenp to the | |
314 | string's length. | |
315 | ||
316 | This function uses malloc to obtain storage for the copy; the | |
317 | caller is responsible for freeing it. */ | |
318 | char * | |
319 | gh_symbol2newstr (SCM sym, int *lenp) | |
320 | { | |
321 | char *ret_str; | |
322 | int len; | |
323 | ||
324 | SCM_ASSERT (SCM_NIMP (sym) && SCM_SYMBOLP (sym), sym, SCM_ARG3, | |
325 | "gh_scm2newsymbol"); | |
326 | ||
327 | /* protect str from GC while we copy off its data */ | |
328 | scm_protect_object (sym); | |
329 | ||
330 | len = SCM_LENGTH (sym); | |
331 | ||
9b1b00fe JB |
332 | ret_str = (char *) scm_must_malloc ((len + 1) * sizeof (char), |
333 | "gh_symbol2newstr"); | |
ee2a8b9b JB |
334 | /* so we copy tmp_str to ret_str, which is what we will allocate */ |
335 | memcpy (ret_str, SCM_CHARS (sym), len); | |
336 | /* now make sure we null-terminate it */ | |
337 | ret_str[len] = '\0'; | |
338 | ||
339 | scm_unprotect_object (sym); | |
340 | ||
341 | if (lenp != NULL) | |
342 | { | |
343 | *lenp = len; | |
344 | } | |
345 | ||
346 | return ret_str; | |
347 | } | |
348 | ||
349 | ||
350 | /* create a new vector of the given length, all initialized to the | |
351 | given value */ | |
e5eece74 MG |
352 | SCM |
353 | gh_make_vector (SCM len, SCM fill) | |
ee2a8b9b | 354 | { |
e5eece74 MG |
355 | /* scm_make_vector() takes a third boolean argument which should be |
356 | set to SCM_BOOL_T when you are dealing with multi-dimensional | |
357 | arrays; gh_make_vector() does not do multi-dimensional arrays */ | |
358 | return scm_make_vector(len, fill, SCM_BOOL_F); | |
ee2a8b9b JB |
359 | } |
360 | ||
361 | /* set the given element of the given vector to the given value */ | |
362 | SCM | |
956328d2 | 363 | gh_vector_set_x (SCM vec, SCM pos, SCM val) |
ee2a8b9b JB |
364 | { |
365 | return scm_vector_set_x (vec, pos, val); | |
366 | } | |
367 | ||
368 | /* retrieve the given element of the given vector */ | |
369 | SCM | |
e5eece74 | 370 | gh_vector_ref (SCM vec, SCM pos) |
ee2a8b9b JB |
371 | { |
372 | return scm_vector_ref (vec, pos); | |
373 | } | |
374 | ||
375 | /* returns the length of the given vector */ | |
376 | unsigned long | |
377 | gh_vector_length (SCM v) | |
378 | { | |
379 | return gh_scm2ulong (scm_vector_length (v)); | |
380 | } | |
35379308 | 381 | |
ef5d3ae1 MG |
382 | |
383 | /* uniform vector support */ | |
384 | ||
385 | /* returns the length as a C unsigned long integer */ | |
386 | unsigned long | |
387 | gh_uniform_vector_length (SCM v) | |
388 | { | |
389 | return gh_scm2ulong (scm_uniform_vector_length (v)); | |
390 | } | |
391 | ||
392 | /* gets the given element from a uniform vector; ilist is a list (or | |
393 | possibly a single integer) of indices, and its length is the | |
394 | dimension of the uniform vector */ | |
395 | SCM | |
396 | gh_uniform_vector_ref (SCM v, SCM ilist) | |
397 | { | |
398 | return scm_uniform_vector_ref (v, ilist); | |
399 | } | |
400 | ||
401 | /* sets an individual element in a uniform vector */ | |
402 | /* SCM */ | |
403 | /* gh_list_to_uniform_array ( */ | |
404 | ||
405 | ||
35379308 JB |
406 | /* Data lookups between C and Scheme |
407 | ||
408 | Look up a symbol with a given name, and return the object to which | |
409 | it is bound. gh_lookup examines the Guile top level, and | |
410 | gh_module_lookup checks the module namespace specified by the | |
411 | `vec' argument. | |
412 | ||
413 | The return value is the Scheme object to which SNAME is bound, or | |
414 | SCM_UNDEFINED if SNAME is not bound in the given context. [FIXME: | |
415 | should this be SCM_UNSPECIFIED? Can a symbol ever legitimately be | |
416 | bound to SCM_UNDEFINED or SCM_UNSPECIFIED? What is the difference? | |
417 | -twp] */ | |
418 | ||
419 | SCM | |
420 | gh_lookup (char *sname) | |
421 | { | |
422 | return gh_module_lookup (SCM_BOOL_F, sname); | |
423 | } | |
424 | ||
425 | SCM | |
426 | gh_module_lookup (SCM vec, char *sname) | |
427 | { | |
428 | SCM sym = gh_symbol2scm (sname); | |
429 | if ((scm_symbol_bound_p (vec, sym)) == SCM_BOOL_T) | |
430 | return scm_symbol_binding (vec, sym); | |
431 | else | |
432 | return SCM_UNDEFINED; | |
433 | } |