Commit | Line | Data |
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3ee86942 | 1 | /* Copyright (C) 1995,1996,1998,2000,2001, 2004 Free Software Foundation, Inc. |
0f2d19dd | 2 | * |
73be1d9e MV |
3 | * This library is free software; you can redistribute it and/or |
4 | * modify it under the terms of the GNU Lesser General Public | |
5 | * License as published by the Free Software Foundation; either | |
6 | * version 2.1 of the License, or (at your option) any later version. | |
0f2d19dd | 7 | * |
73be1d9e MV |
8 | * This library 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 GNU | |
11 | * Lesser General Public License for more details. | |
0f2d19dd | 12 | * |
73be1d9e MV |
13 | * You should have received a copy of the GNU Lesser General Public |
14 | * License along with this library; if not, write to the Free Software | |
15 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
16 | */ | |
1bbd0b84 | 17 | |
1bbd0b84 | 18 | |
0f2d19dd JB |
19 | \f |
20 | ||
faf2c9d7 | 21 | #include <string.h> |
3ee86942 | 22 | #include <stdio.h> |
faf2c9d7 | 23 | |
a0599745 MD |
24 | #include "libguile/_scm.h" |
25 | #include "libguile/chars.h" | |
7c33806a | 26 | #include "libguile/root.h" |
a0599745 | 27 | #include "libguile/strings.h" |
1afff620 | 28 | #include "libguile/deprecation.h" |
a0599745 | 29 | #include "libguile/validate.h" |
c829a427 | 30 | #include "libguile/dynwind.h" |
1afff620 | 31 | |
0f2d19dd JB |
32 | \f |
33 | ||
34 | /* {Strings} | |
35 | */ | |
36 | ||
3ee86942 MV |
37 | |
38 | /* Stringbufs | |
39 | * | |
40 | * XXX - keeping an accurate refcount during GC seems to be quite | |
41 | * tricky, so we just keep score of whether a stringbuf might be | |
42 | * shared, not wether it definitely is. | |
43 | * | |
44 | * The scheme I (mvo) tried to keep an accurate reference count would | |
45 | * recount all strings that point to a stringbuf during the mark-phase | |
46 | * of the GC. This was done since one cannot access the stringbuf of | |
47 | * a string when that string is freed (in order to decrease the | |
48 | * reference count). The memory of the stringbuf might have been | |
49 | * reused already for something completely different. | |
50 | * | |
51 | * This recounted worked for a small number of threads beating on | |
52 | * cow-strings, but it failed randomly with more than 10 threads, say. | |
53 | * I couldn't figure out what went wrong, so I used the conservative | |
54 | * approach implemented below. | |
55 | * | |
56 | * A stringbuf needs to know its length, but only so that it can be | |
57 | * reported when the stringbuf is freed. | |
58 | * | |
59 | * Stringbufs (and strings) are not stored very compactly: a stringbuf | |
60 | * has room for about 2*sizeof(scm_t_bits)-1 bytes additional | |
61 | * information. As a compensation, the code below is made more | |
62 | * complicated by storing small strings inline in the double cell of a | |
63 | * stringbuf. So we have fixstrings and bigstrings... | |
64 | */ | |
65 | ||
66 | #define STRINGBUF_F_SHARED 0x100 | |
67 | #define STRINGBUF_F_INLINE 0x200 | |
68 | ||
69 | #define STRINGBUF_TAG scm_tc7_stringbuf | |
70 | #define STRINGBUF_SHARED(buf) (SCM_CELL_WORD_0(buf) & STRINGBUF_F_SHARED) | |
71 | #define STRINGBUF_INLINE(buf) (SCM_CELL_WORD_0(buf) & STRINGBUF_F_INLINE) | |
72 | ||
73 | #define STRINGBUF_OUTLINE_CHARS(buf) ((char *)SCM_CELL_WORD_1(buf)) | |
74 | #define STRINGBUF_OUTLINE_LENGTH(buf) (SCM_CELL_WORD_2(buf)) | |
75 | #define STRINGBUF_INLINE_CHARS(buf) ((char *)SCM_CELL_OBJECT_LOC(buf,1)) | |
76 | #define STRINGBUF_INLINE_LENGTH(buf) (((size_t)SCM_CELL_WORD_0(buf))>>16) | |
77 | ||
78 | #define STRINGBUF_CHARS(buf) (STRINGBUF_INLINE (buf) \ | |
79 | ? STRINGBUF_INLINE_CHARS (buf) \ | |
80 | : STRINGBUF_OUTLINE_CHARS (buf)) | |
81 | #define STRINGBUF_LENGTH(buf) (STRINGBUF_INLINE (buf) \ | |
82 | ? STRINGBUF_INLINE_LENGTH (buf) \ | |
83 | : STRINGBUF_OUTLINE_LENGTH (buf)) | |
84 | ||
85 | #define STRINGBUF_MAX_INLINE_LEN (3*sizeof(scm_t_bits)) | |
86 | ||
87 | #define SET_STRINGBUF_SHARED(buf) \ | |
88 | (SCM_SET_CELL_WORD_0 ((buf), SCM_CELL_WORD_0 (buf) | STRINGBUF_F_SHARED)) | |
89 | ||
90 | #if SCM_DEBUG | |
91 | static size_t lenhist[1001]; | |
92 | #endif | |
93 | ||
94 | static SCM | |
95 | make_stringbuf (size_t len) | |
0f2d19dd | 96 | { |
3ee86942 MV |
97 | /* XXX - for the benefit of SCM_STRING_CHARS, SCM_SYMBOL_CHARS and |
98 | scm_i_symbol_chars, all stringbufs are null-terminated. Once | |
99 | SCM_STRING_CHARS and SCM_SYMBOL_CHARS are removed and the code | |
100 | has been changed for scm_i_symbol_chars, this null-termination | |
101 | can be dropped. | |
102 | */ | |
103 | ||
104 | #if SCM_DEBUG | |
105 | if (len < 1000) | |
106 | lenhist[len]++; | |
107 | else | |
108 | lenhist[1000]++; | |
109 | #endif | |
0f2d19dd | 110 | |
3ee86942 MV |
111 | if (len <= STRINGBUF_MAX_INLINE_LEN-1) |
112 | { | |
113 | return scm_double_cell (STRINGBUF_TAG | STRINGBUF_F_INLINE | (len << 16), | |
114 | 0, 0, 0); | |
115 | } | |
116 | else | |
117 | { | |
118 | char *mem = scm_gc_malloc (len+1, "string"); | |
119 | mem[len] = '\0'; | |
120 | return scm_double_cell (STRINGBUF_TAG, (scm_t_bits) mem, | |
121 | (scm_t_bits) len, (scm_t_bits) 0); | |
122 | } | |
123 | } | |
e53cc817 | 124 | |
3ee86942 MV |
125 | SCM |
126 | scm_i_stringbuf_mark (SCM buf) | |
127 | { | |
128 | return SCM_BOOL_F; | |
129 | } | |
1bbd0b84 | 130 | |
3ee86942 MV |
131 | void |
132 | scm_i_stringbuf_free (SCM buf) | |
0f2d19dd | 133 | { |
3ee86942 MV |
134 | if (!STRINGBUF_INLINE (buf)) |
135 | scm_gc_free (STRINGBUF_OUTLINE_CHARS (buf), | |
136 | STRINGBUF_OUTLINE_LENGTH (buf) + 1, "string"); | |
137 | } | |
bd9e24b3 | 138 | |
76da80e7 | 139 | SCM_MUTEX (stringbuf_write_mutex); |
bd9e24b3 | 140 | |
3ee86942 MV |
141 | /* Copy-on-write strings. |
142 | */ | |
bd9e24b3 | 143 | |
3ee86942 | 144 | #define STRING_TAG scm_tc7_string |
bd9e24b3 | 145 | |
3ee86942 MV |
146 | #define STRING_STRINGBUF(str) (SCM_CELL_OBJECT_1(str)) |
147 | #define STRING_START(str) ((size_t)SCM_CELL_WORD_2(str)) | |
148 | #define STRING_LENGTH(str) ((size_t)SCM_CELL_WORD_3(str)) | |
bd9e24b3 | 149 | |
3ee86942 MV |
150 | #define SET_STRING_STRINGBUF(str,buf) (SCM_SET_CELL_OBJECT_1(str,buf)) |
151 | #define SET_STRING_START(str,start) (SCM_SET_CELL_WORD_2(str,start)) | |
152 | ||
153 | #define IS_STRING(str) (SCM_NIMP(str) && SCM_TYP7(str) == STRING_TAG) | |
154 | ||
ed35de72 MV |
155 | /* Read-only strings. |
156 | */ | |
157 | ||
158 | #define RO_STRING_TAG (scm_tc7_string + 0x200) | |
159 | #define IS_RO_STRING(str) (SCM_CELL_TYPE(str)==RO_STRING_TAG) | |
160 | ||
e1b29f6a MV |
161 | /* Mutation-sharing substrings |
162 | */ | |
163 | ||
164 | #define SH_STRING_TAG (scm_tc7_string + 0x100) | |
165 | ||
166 | #define SH_STRING_STRING(sh) (SCM_CELL_OBJECT_1(sh)) | |
167 | /* START and LENGTH as for STRINGs. */ | |
168 | ||
169 | #define IS_SH_STRING(str) (SCM_CELL_TYPE(str)==SH_STRING_TAG) | |
170 | ||
3ee86942 MV |
171 | SCM |
172 | scm_i_make_string (size_t len, char **charsp) | |
173 | { | |
174 | SCM buf = make_stringbuf (len); | |
175 | SCM res; | |
176 | if (charsp) | |
177 | *charsp = STRINGBUF_CHARS (buf); | |
178 | res = scm_double_cell (STRING_TAG, SCM_UNPACK(buf), | |
179 | (scm_t_bits)0, (scm_t_bits) len); | |
180 | return res; | |
0f2d19dd JB |
181 | } |
182 | ||
3ee86942 MV |
183 | static void |
184 | validate_substring_args (SCM str, size_t start, size_t end) | |
185 | { | |
186 | if (!IS_STRING (str)) | |
187 | scm_wrong_type_arg_msg (NULL, 0, str, "string"); | |
188 | if (start > STRING_LENGTH (str)) | |
189 | scm_out_of_range (NULL, scm_from_size_t (start)); | |
190 | if (end > STRING_LENGTH (str) || end < start) | |
191 | scm_out_of_range (NULL, scm_from_size_t (end)); | |
192 | } | |
0f2d19dd | 193 | |
e1b29f6a MV |
194 | static inline void |
195 | get_str_buf_start (SCM *str, SCM *buf, size_t *start) | |
196 | { | |
197 | *start = STRING_START (*str); | |
198 | if (IS_SH_STRING (*str)) | |
199 | { | |
200 | *str = SH_STRING_STRING (*str); | |
201 | *start += STRING_START (*str); | |
202 | } | |
203 | *buf = STRING_STRINGBUF (*str); | |
204 | } | |
205 | ||
3ee86942 MV |
206 | SCM |
207 | scm_i_substring (SCM str, size_t start, size_t end) | |
0f2d19dd | 208 | { |
e1b29f6a MV |
209 | SCM buf; |
210 | size_t str_start; | |
211 | get_str_buf_start (&str, &buf, &str_start); | |
76da80e7 | 212 | scm_i_plugin_mutex_lock (&stringbuf_write_mutex); |
3ee86942 | 213 | SET_STRINGBUF_SHARED (buf); |
76da80e7 | 214 | scm_i_plugin_mutex_unlock (&stringbuf_write_mutex); |
3ee86942 | 215 | return scm_double_cell (STRING_TAG, SCM_UNPACK(buf), |
e1b29f6a MV |
216 | (scm_t_bits)str_start + start, |
217 | (scm_t_bits) end - start); | |
0f2d19dd JB |
218 | } |
219 | ||
ed35de72 MV |
220 | SCM |
221 | scm_i_substring_read_only (SCM str, size_t start, size_t end) | |
222 | { | |
223 | SCM buf; | |
224 | size_t str_start; | |
225 | get_str_buf_start (&str, &buf, &str_start); | |
76da80e7 | 226 | scm_i_plugin_mutex_lock (&stringbuf_write_mutex); |
ed35de72 | 227 | SET_STRINGBUF_SHARED (buf); |
76da80e7 | 228 | scm_i_plugin_mutex_unlock (&stringbuf_write_mutex); |
ed35de72 MV |
229 | return scm_double_cell (RO_STRING_TAG, SCM_UNPACK(buf), |
230 | (scm_t_bits)str_start + start, | |
231 | (scm_t_bits) end - start); | |
232 | } | |
233 | ||
3ee86942 MV |
234 | SCM |
235 | scm_i_substring_copy (SCM str, size_t start, size_t end) | |
236 | { | |
237 | size_t len = end - start; | |
edea856c | 238 | SCM buf, my_buf; |
e1b29f6a MV |
239 | size_t str_start; |
240 | get_str_buf_start (&str, &buf, &str_start); | |
edea856c | 241 | my_buf = make_stringbuf (len); |
e1b29f6a MV |
242 | memcpy (STRINGBUF_CHARS (my_buf), |
243 | STRINGBUF_CHARS (buf) + str_start + start, len); | |
3ee86942 MV |
244 | scm_remember_upto_here_1 (buf); |
245 | return scm_double_cell (STRING_TAG, SCM_UNPACK(my_buf), | |
246 | (scm_t_bits)0, (scm_t_bits) len); | |
247 | } | |
0f2d19dd | 248 | |
e1b29f6a MV |
249 | SCM |
250 | scm_i_substring_shared (SCM str, size_t start, size_t end) | |
251 | { | |
252 | if (start == 0 && end == STRING_LENGTH (str)) | |
253 | return str; | |
254 | else | |
255 | { | |
256 | size_t len = end - start; | |
257 | if (IS_SH_STRING (str)) | |
258 | { | |
259 | start += STRING_START (str); | |
260 | str = SH_STRING_STRING (str); | |
261 | } | |
262 | return scm_double_cell (SH_STRING_TAG, SCM_UNPACK(str), | |
263 | (scm_t_bits)start, (scm_t_bits) len); | |
264 | } | |
265 | } | |
266 | ||
3ee86942 MV |
267 | SCM |
268 | scm_c_substring (SCM str, size_t start, size_t end) | |
269 | { | |
270 | validate_substring_args (str, start, end); | |
271 | return scm_i_substring (str, start, end); | |
272 | } | |
ee149d03 | 273 | |
ed35de72 MV |
274 | SCM |
275 | scm_c_substring_read_only (SCM str, size_t start, size_t end) | |
276 | { | |
277 | validate_substring_args (str, start, end); | |
278 | return scm_i_substring_read_only (str, start, end); | |
279 | } | |
280 | ||
0f2d19dd | 281 | SCM |
3ee86942 | 282 | scm_c_substring_copy (SCM str, size_t start, size_t end) |
0f2d19dd | 283 | { |
3ee86942 MV |
284 | validate_substring_args (str, start, end); |
285 | return scm_i_substring_copy (str, start, end); | |
286 | } | |
287 | ||
3ee86942 MV |
288 | SCM |
289 | scm_c_substring_shared (SCM str, size_t start, size_t end) | |
290 | { | |
291 | validate_substring_args (str, start, end); | |
292 | return scm_i_substring_shared (str, start, end); | |
293 | } | |
0f2d19dd | 294 | |
ee149d03 | 295 | SCM |
3ee86942 | 296 | scm_i_string_mark (SCM str) |
ee149d03 | 297 | { |
3ee86942 MV |
298 | if (IS_SH_STRING (str)) |
299 | return SH_STRING_STRING (str); | |
300 | else | |
301 | return STRING_STRINGBUF (str); | |
ee149d03 JB |
302 | } |
303 | ||
3ee86942 MV |
304 | void |
305 | scm_i_string_free (SCM str) | |
306 | { | |
307 | } | |
36284627 | 308 | |
3ee86942 MV |
309 | /* Internal accessors |
310 | */ | |
311 | ||
312 | size_t | |
313 | scm_i_string_length (SCM str) | |
0f2d19dd | 314 | { |
3ee86942 | 315 | return STRING_LENGTH (str); |
0f2d19dd JB |
316 | } |
317 | ||
3ee86942 MV |
318 | const char * |
319 | scm_i_string_chars (SCM str) | |
320 | { | |
321 | SCM buf; | |
e1b29f6a MV |
322 | size_t start; |
323 | get_str_buf_start (&str, &buf, &start); | |
3ee86942 MV |
324 | return STRINGBUF_CHARS (buf) + start; |
325 | } | |
b00418df | 326 | |
3ee86942 | 327 | char * |
ed35de72 | 328 | scm_i_string_writable_chars (SCM orig_str) |
b00418df | 329 | { |
ed35de72 | 330 | SCM buf, str = orig_str; |
e1b29f6a | 331 | size_t start; |
ed35de72 | 332 | |
e1b29f6a | 333 | get_str_buf_start (&str, &buf, &start); |
ed35de72 MV |
334 | if (IS_RO_STRING (str)) |
335 | scm_misc_error (NULL, "string is read-only: ~s", scm_list_1 (orig_str)); | |
336 | ||
76da80e7 | 337 | scm_i_plugin_mutex_lock (&stringbuf_write_mutex); |
3ee86942 MV |
338 | if (STRINGBUF_SHARED (buf)) |
339 | { | |
340 | /* Clone stringbuf. For this, we put all threads to sleep. | |
341 | */ | |
342 | ||
343 | size_t len = STRING_LENGTH (str); | |
344 | SCM new_buf; | |
345 | ||
76da80e7 | 346 | scm_i_plugin_mutex_unlock (&stringbuf_write_mutex); |
3ee86942 MV |
347 | |
348 | new_buf = make_stringbuf (len); | |
349 | memcpy (STRINGBUF_CHARS (new_buf), | |
350 | STRINGBUF_CHARS (buf) + STRING_START (str), len); | |
351 | ||
352 | scm_i_thread_put_to_sleep (); | |
353 | SET_STRING_STRINGBUF (str, new_buf); | |
354 | start -= STRING_START (str); | |
355 | SET_STRING_START (str, 0); | |
356 | scm_i_thread_wake_up (); | |
357 | ||
358 | buf = new_buf; | |
359 | ||
76da80e7 | 360 | scm_i_plugin_mutex_lock (&stringbuf_write_mutex); |
3ee86942 MV |
361 | } |
362 | ||
363 | return STRINGBUF_CHARS (buf) + start; | |
b00418df DH |
364 | } |
365 | ||
3ee86942 MV |
366 | void |
367 | scm_i_string_stop_writing (void) | |
368 | { | |
76da80e7 | 369 | scm_i_plugin_mutex_unlock (&stringbuf_write_mutex); |
3ee86942 | 370 | } |
b00418df | 371 | |
3ee86942 MV |
372 | /* Symbols. |
373 | ||
374 | Basic symbol creation and accessing is done here, the rest is in | |
375 | symbols.[hc]. This has been done to keep stringbufs and the | |
376 | internals of strings and string-like objects confined to this file. | |
377 | */ | |
378 | ||
379 | #define SYMBOL_STRINGBUF SCM_CELL_OBJECT_1 | |
380 | ||
381 | SCM | |
6869328b MV |
382 | scm_i_make_symbol (SCM name, scm_t_bits flags, |
383 | unsigned long hash, SCM props) | |
3ee86942 MV |
384 | { |
385 | SCM buf; | |
386 | size_t start = STRING_START (name); | |
387 | size_t length = STRING_LENGTH (name); | |
388 | ||
389 | if (IS_SH_STRING (name)) | |
390 | { | |
391 | name = SH_STRING_STRING (name); | |
392 | start += STRING_START (name); | |
393 | } | |
394 | buf = SYMBOL_STRINGBUF (name); | |
395 | ||
396 | if (start == 0 && length == STRINGBUF_LENGTH (buf)) | |
397 | { | |
398 | /* reuse buf. */ | |
76da80e7 | 399 | scm_i_plugin_mutex_lock (&stringbuf_write_mutex); |
3ee86942 | 400 | SET_STRINGBUF_SHARED (buf); |
76da80e7 | 401 | scm_i_plugin_mutex_unlock (&stringbuf_write_mutex); |
3ee86942 MV |
402 | } |
403 | else | |
404 | { | |
405 | /* make new buf. */ | |
406 | SCM new_buf = make_stringbuf (length); | |
407 | memcpy (STRINGBUF_CHARS (new_buf), | |
408 | STRINGBUF_CHARS (buf) + start, length); | |
409 | buf = new_buf; | |
410 | } | |
6869328b | 411 | return scm_double_cell (scm_tc7_symbol | flags, SCM_UNPACK (buf), |
3ee86942 MV |
412 | (scm_t_bits) hash, SCM_UNPACK (props)); |
413 | } | |
414 | ||
415 | size_t | |
416 | scm_i_symbol_length (SCM sym) | |
0f2d19dd | 417 | { |
3ee86942 | 418 | return STRINGBUF_LENGTH (SYMBOL_STRINGBUF (sym)); |
0f2d19dd JB |
419 | } |
420 | ||
3ee86942 MV |
421 | const char * |
422 | scm_i_symbol_chars (SCM sym) | |
423 | { | |
424 | SCM buf = SYMBOL_STRINGBUF (sym); | |
425 | return STRINGBUF_CHARS (buf); | |
426 | } | |
1cc91f1b | 427 | |
3ee86942 MV |
428 | SCM |
429 | scm_i_symbol_mark (SCM sym) | |
0f2d19dd | 430 | { |
3ee86942 MV |
431 | scm_gc_mark (SYMBOL_STRINGBUF (sym)); |
432 | return SCM_CELL_OBJECT_3 (sym); | |
0f2d19dd JB |
433 | } |
434 | ||
3ee86942 MV |
435 | void |
436 | scm_i_symbol_free (SCM sym) | |
437 | { | |
438 | } | |
0f2d19dd | 439 | |
be54b15d | 440 | SCM |
3ee86942 | 441 | scm_i_symbol_substring (SCM sym, size_t start, size_t end) |
be54b15d | 442 | { |
3ee86942 | 443 | SCM buf = SYMBOL_STRINGBUF (sym); |
76da80e7 | 444 | scm_i_plugin_mutex_lock (&stringbuf_write_mutex); |
3ee86942 | 445 | SET_STRINGBUF_SHARED (buf); |
76da80e7 | 446 | scm_i_plugin_mutex_unlock (&stringbuf_write_mutex); |
3ee86942 MV |
447 | return scm_double_cell (STRING_TAG, SCM_UNPACK(buf), |
448 | (scm_t_bits)start, (scm_t_bits) end - start); | |
449 | } | |
be54b15d | 450 | |
3ee86942 MV |
451 | /* Debugging |
452 | */ | |
be54b15d | 453 | |
3ee86942 | 454 | #if SCM_DEBUG |
be54b15d | 455 | |
3ee86942 MV |
456 | SCM scm_sys_string_dump (SCM); |
457 | SCM scm_sys_symbol_dump (SCM); | |
458 | SCM scm_sys_stringbuf_hist (void); | |
be54b15d | 459 | |
3ee86942 MV |
460 | SCM_DEFINE (scm_sys_string_dump, "%string-dump", 1, 0, 0, |
461 | (SCM str), | |
462 | "") | |
463 | #define FUNC_NAME s_scm_sys_string_dump | |
464 | { | |
465 | SCM_VALIDATE_STRING (1, str); | |
466 | fprintf (stderr, "%p:\n", str); | |
467 | fprintf (stderr, " start: %u\n", STRING_START (str)); | |
468 | fprintf (stderr, " len: %u\n", STRING_LENGTH (str)); | |
469 | if (IS_SH_STRING (str)) | |
470 | { | |
471 | fprintf (stderr, " string: %p\n", SH_STRING_STRING (str)); | |
472 | fprintf (stderr, "\n"); | |
473 | scm_sys_string_dump (SH_STRING_STRING (str)); | |
474 | } | |
475 | else | |
476 | { | |
477 | SCM buf = STRING_STRINGBUF (str); | |
478 | fprintf (stderr, " buf: %p\n", buf); | |
479 | fprintf (stderr, " chars: %p\n", STRINGBUF_CHARS (buf)); | |
480 | fprintf (stderr, " length: %u\n", STRINGBUF_LENGTH (buf)); | |
481 | fprintf (stderr, " flags: %x\n", (SCM_CELL_WORD_0 (buf) & 0x300)); | |
482 | } | |
483 | return SCM_UNSPECIFIED; | |
484 | } | |
485 | #undef FUNC_NAME | |
486 | ||
487 | SCM_DEFINE (scm_sys_symbol_dump, "%symbol-dump", 1, 0, 0, | |
488 | (SCM sym), | |
489 | "") | |
490 | #define FUNC_NAME s_scm_sys_symbol_dump | |
491 | { | |
492 | SCM_VALIDATE_SYMBOL (1, sym); | |
493 | fprintf (stderr, "%p:\n", sym); | |
494 | fprintf (stderr, " hash: %lu\n", scm_i_symbol_hash (sym)); | |
495 | { | |
496 | SCM buf = SYMBOL_STRINGBUF (sym); | |
497 | fprintf (stderr, " buf: %p\n", buf); | |
498 | fprintf (stderr, " chars: %p\n", STRINGBUF_CHARS (buf)); | |
499 | fprintf (stderr, " length: %u\n", STRINGBUF_LENGTH (buf)); | |
500 | fprintf (stderr, " shared: %u\n", STRINGBUF_SHARED (buf)); | |
501 | } | |
502 | return SCM_UNSPECIFIED; | |
503 | } | |
504 | #undef FUNC_NAME | |
505 | ||
506 | SCM_DEFINE (scm_sys_stringbuf_hist, "%stringbuf-hist", 0, 0, 0, | |
507 | (void), | |
508 | "") | |
e1b29f6a | 509 | #define FUNC_NAME s_scm_sys_stringbuf_hist |
3ee86942 MV |
510 | { |
511 | int i; | |
512 | for (i = 0; i < 1000; i++) | |
513 | if (lenhist[i]) | |
514 | fprintf (stderr, " %3d: %u\n", i, lenhist[i]); | |
515 | fprintf (stderr, ">999: %u\n", lenhist[1000]); | |
516 | return SCM_UNSPECIFIED; | |
be54b15d DH |
517 | } |
518 | #undef FUNC_NAME | |
519 | ||
3ee86942 MV |
520 | #endif |
521 | ||
522 | \f | |
523 | ||
524 | SCM_DEFINE (scm_string_p, "string?", 1, 0, 0, | |
525 | (SCM obj), | |
526 | "Return @code{#t} if @var{obj} is a string, else @code{#f}.") | |
527 | #define FUNC_NAME s_scm_string_p | |
528 | { | |
529 | return scm_from_bool (IS_STRING (obj)); | |
530 | } | |
531 | #undef FUNC_NAME | |
532 | ||
533 | ||
534 | SCM_REGISTER_PROC (s_scm_list_to_string, "list->string", 1, 0, 0, scm_string); | |
535 | ||
536 | SCM_DEFINE (scm_string, "string", 0, 0, 1, | |
537 | (SCM chrs), | |
538 | "@deffnx {Scheme Procedure} list->string chrs\n" | |
539 | "Return a newly allocated string composed of the arguments,\n" | |
540 | "@var{chrs}.") | |
541 | #define FUNC_NAME s_scm_string | |
542 | { | |
543 | SCM result; | |
544 | size_t len; | |
545 | char *data; | |
546 | ||
547 | { | |
548 | long i = scm_ilength (chrs); | |
549 | ||
550 | SCM_ASSERT (i >= 0, chrs, SCM_ARG1, FUNC_NAME); | |
551 | len = i; | |
552 | } | |
553 | ||
554 | result = scm_i_make_string (len, &data); | |
d2e53ed6 | 555 | while (len > 0 && scm_is_pair (chrs)) |
3ee86942 MV |
556 | { |
557 | SCM elt = SCM_CAR (chrs); | |
558 | ||
559 | SCM_VALIDATE_CHAR (SCM_ARGn, elt); | |
560 | *data++ = SCM_CHAR (elt); | |
561 | chrs = SCM_CDR (chrs); | |
562 | len--; | |
563 | } | |
564 | if (len > 0) | |
565 | scm_misc_error (NULL, "list changed while constructing string", SCM_EOL); | |
d2e53ed6 | 566 | if (!scm_is_null (chrs)) |
3ee86942 MV |
567 | scm_wrong_type_arg_msg (NULL, 0, chrs, "proper list"); |
568 | ||
569 | return result; | |
570 | } | |
571 | #undef FUNC_NAME | |
be54b15d | 572 | |
3b3b36dd | 573 | SCM_DEFINE (scm_make_string, "make-string", 1, 1, 0, |
6fa73e72 | 574 | (SCM k, SCM chr), |
0d26a824 MG |
575 | "Return a newly allocated string of\n" |
576 | "length @var{k}. If @var{chr} is given, then all elements of\n" | |
577 | "the string are initialized to @var{chr}, otherwise the contents\n" | |
9401323e | 578 | "of the @var{string} are unspecified.") |
1bbd0b84 | 579 | #define FUNC_NAME s_scm_make_string |
0f2d19dd | 580 | { |
3ee86942 MV |
581 | return scm_c_make_string (scm_to_size_t (k), chr); |
582 | } | |
583 | #undef FUNC_NAME | |
584 | ||
585 | SCM | |
586 | scm_c_make_string (size_t len, SCM chr) | |
587 | #define FUNC_NAME NULL | |
588 | { | |
589 | char *dst; | |
590 | SCM res = scm_i_make_string (len, &dst); | |
cb0d8be2 | 591 | |
e11e83f3 MV |
592 | if (!SCM_UNBNDP (chr)) |
593 | { | |
3ee86942 MV |
594 | SCM_VALIDATE_CHAR (0, chr); |
595 | memset (dst, SCM_CHAR (chr), len); | |
0f2d19dd | 596 | } |
e11e83f3 MV |
597 | |
598 | return res; | |
0f2d19dd | 599 | } |
1bbd0b84 | 600 | #undef FUNC_NAME |
0f2d19dd | 601 | |
3b3b36dd | 602 | SCM_DEFINE (scm_string_length, "string-length", 1, 0, 0, |
0d26a824 MG |
603 | (SCM string), |
604 | "Return the number of characters in @var{string}.") | |
1bbd0b84 | 605 | #define FUNC_NAME s_scm_string_length |
0f2d19dd | 606 | { |
d1ca2c64 | 607 | SCM_VALIDATE_STRING (1, string); |
3ee86942 | 608 | return scm_from_size_t (STRING_LENGTH (string)); |
0f2d19dd | 609 | } |
1bbd0b84 | 610 | #undef FUNC_NAME |
0f2d19dd | 611 | |
3ee86942 MV |
612 | size_t |
613 | scm_c_string_length (SCM string) | |
614 | { | |
615 | if (!IS_STRING (string)) | |
616 | scm_wrong_type_arg_msg (NULL, 0, string, "string"); | |
617 | return STRING_LENGTH (string); | |
618 | } | |
619 | ||
bd9e24b3 | 620 | SCM_DEFINE (scm_string_ref, "string-ref", 2, 0, 0, |
6fa73e72 | 621 | (SCM str, SCM k), |
0d26a824 MG |
622 | "Return character @var{k} of @var{str} using zero-origin\n" |
623 | "indexing. @var{k} must be a valid index of @var{str}.") | |
1bbd0b84 | 624 | #define FUNC_NAME s_scm_string_ref |
0f2d19dd | 625 | { |
a55c2b68 | 626 | unsigned long idx; |
bd9e24b3 | 627 | |
d1ca2c64 | 628 | SCM_VALIDATE_STRING (1, str); |
3ee86942 MV |
629 | idx = scm_to_unsigned_integer (k, 0, scm_i_string_length (str)-1); |
630 | return SCM_MAKE_CHAR (scm_i_string_chars (str)[idx]); | |
0f2d19dd | 631 | } |
1bbd0b84 | 632 | #undef FUNC_NAME |
0f2d19dd | 633 | |
3ee86942 MV |
634 | SCM |
635 | scm_c_string_ref (SCM str, size_t p) | |
636 | { | |
637 | if (p >= scm_i_string_length (str)) | |
638 | scm_out_of_range (NULL, scm_from_size_t (p)); | |
639 | return SCM_MAKE_CHAR (scm_i_string_chars (str)[p]); | |
640 | } | |
f0942910 | 641 | |
3b3b36dd | 642 | SCM_DEFINE (scm_string_set_x, "string-set!", 3, 0, 0, |
6fa73e72 | 643 | (SCM str, SCM k, SCM chr), |
0d26a824 MG |
644 | "Store @var{chr} in element @var{k} of @var{str} and return\n" |
645 | "an unspecified value. @var{k} must be a valid index of\n" | |
646 | "@var{str}.") | |
1bbd0b84 | 647 | #define FUNC_NAME s_scm_string_set_x |
0f2d19dd | 648 | { |
a55c2b68 MV |
649 | unsigned long idx; |
650 | ||
f0942910 | 651 | SCM_VALIDATE_STRING (1, str); |
3ee86942 | 652 | idx = scm_to_unsigned_integer (k, 0, scm_i_string_length(str)-1); |
34d19ef6 | 653 | SCM_VALIDATE_CHAR (3, chr); |
3ee86942 MV |
654 | { |
655 | char *dst = scm_i_string_writable_chars (str); | |
656 | dst[idx] = SCM_CHAR (chr); | |
657 | scm_i_string_stop_writing (); | |
658 | } | |
0f2d19dd JB |
659 | return SCM_UNSPECIFIED; |
660 | } | |
1bbd0b84 | 661 | #undef FUNC_NAME |
0f2d19dd | 662 | |
3ee86942 MV |
663 | void |
664 | scm_c_string_set_x (SCM str, size_t p, SCM chr) | |
665 | { | |
666 | if (p >= scm_i_string_length (str)) | |
667 | scm_out_of_range (NULL, scm_from_size_t (p)); | |
668 | { | |
669 | char *dst = scm_i_string_writable_chars (str); | |
670 | dst[p] = SCM_CHAR (chr); | |
671 | scm_i_string_stop_writing (); | |
672 | } | |
673 | } | |
0f2d19dd | 674 | |
3b3b36dd | 675 | SCM_DEFINE (scm_substring, "substring", 2, 1, 0, |
0d26a824 MG |
676 | (SCM str, SCM start, SCM end), |
677 | "Return a newly allocated string formed from the characters\n" | |
678 | "of @var{str} beginning with index @var{start} (inclusive) and\n" | |
679 | "ending with index @var{end} (exclusive).\n" | |
680 | "@var{str} must be a string, @var{start} and @var{end} must be\n" | |
681 | "exact integers satisfying:\n\n" | |
682 | "0 <= @var{start} <= @var{end} <= (string-length @var{str}).") | |
1bbd0b84 | 683 | #define FUNC_NAME s_scm_substring |
0f2d19dd | 684 | { |
3ee86942 | 685 | size_t len, from, to; |
685c0d71 | 686 | |
d1ca2c64 | 687 | SCM_VALIDATE_STRING (1, str); |
3ee86942 MV |
688 | len = scm_i_string_length (str); |
689 | from = scm_to_unsigned_integer (start, 0, len); | |
a55c2b68 | 690 | if (SCM_UNBNDP (end)) |
3ee86942 | 691 | to = len; |
a55c2b68 | 692 | else |
3ee86942 MV |
693 | to = scm_to_unsigned_integer (end, from, len); |
694 | return scm_i_substring (str, from, to); | |
0f2d19dd | 695 | } |
1bbd0b84 | 696 | #undef FUNC_NAME |
0f2d19dd | 697 | |
ed35de72 MV |
698 | SCM_DEFINE (scm_substring_read_only, "substring/read-only", 2, 1, 0, |
699 | (SCM str, SCM start, SCM end), | |
700 | "Return a newly allocated string formed from the characters\n" | |
701 | "of @var{str} beginning with index @var{start} (inclusive) and\n" | |
702 | "ending with index @var{end} (exclusive).\n" | |
703 | "@var{str} must be a string, @var{start} and @var{end} must be\n" | |
704 | "exact integers satisfying:\n" | |
705 | "\n" | |
706 | "0 <= @var{start} <= @var{end} <= (string-length @var{str}).\n" | |
707 | "\n" | |
708 | "The returned string is read-only.\n") | |
709 | #define FUNC_NAME s_scm_substring_read_only | |
710 | { | |
711 | size_t len, from, to; | |
712 | ||
713 | SCM_VALIDATE_STRING (1, str); | |
714 | len = scm_i_string_length (str); | |
715 | from = scm_to_unsigned_integer (start, 0, len); | |
716 | if (SCM_UNBNDP (end)) | |
717 | to = len; | |
718 | else | |
719 | to = scm_to_unsigned_integer (end, from, len); | |
720 | return scm_i_substring_read_only (str, from, to); | |
721 | } | |
722 | #undef FUNC_NAME | |
723 | ||
3ee86942 MV |
724 | SCM_DEFINE (scm_substring_copy, "substring/copy", 2, 1, 0, |
725 | (SCM str, SCM start, SCM end), | |
726 | "Return a newly allocated string formed from the characters\n" | |
727 | "of @var{str} beginning with index @var{start} (inclusive) and\n" | |
728 | "ending with index @var{end} (exclusive).\n" | |
729 | "@var{str} must be a string, @var{start} and @var{end} must be\n" | |
730 | "exact integers satisfying:\n\n" | |
731 | "0 <= @var{start} <= @var{end} <= (string-length @var{str}).") | |
732 | #define FUNC_NAME s_scm_substring_copy | |
733 | { | |
e1b29f6a MV |
734 | /* For the Scheme version, START is mandatory, but for the C |
735 | version, it is optional. See scm_string_copy in srfi-13.c for a | |
736 | rationale. | |
737 | */ | |
738 | ||
739 | size_t from, to; | |
3ee86942 MV |
740 | |
741 | SCM_VALIDATE_STRING (1, str); | |
e1b29f6a MV |
742 | scm_i_get_substring_spec (scm_i_string_length (str), |
743 | start, &from, end, &to); | |
3ee86942 MV |
744 | return scm_i_substring_copy (str, from, to); |
745 | } | |
746 | #undef FUNC_NAME | |
747 | ||
748 | SCM_DEFINE (scm_substring_shared, "substring/shared", 2, 1, 0, | |
749 | (SCM str, SCM start, SCM end), | |
750 | "Return string that indirectly refers to the characters\n" | |
751 | "of @var{str} beginning with index @var{start} (inclusive) and\n" | |
752 | "ending with index @var{end} (exclusive).\n" | |
753 | "@var{str} must be a string, @var{start} and @var{end} must be\n" | |
754 | "exact integers satisfying:\n\n" | |
755 | "0 <= @var{start} <= @var{end} <= (string-length @var{str}).") | |
756 | #define FUNC_NAME s_scm_substring_shared | |
757 | { | |
758 | size_t len, from, to; | |
759 | ||
760 | SCM_VALIDATE_STRING (1, str); | |
761 | len = scm_i_string_length (str); | |
762 | from = scm_to_unsigned_integer (start, 0, len); | |
763 | if (SCM_UNBNDP (end)) | |
764 | to = len; | |
765 | else | |
766 | to = scm_to_unsigned_integer (end, from, len); | |
767 | return scm_i_substring_shared (str, from, to); | |
768 | } | |
769 | #undef FUNC_NAME | |
685c0d71 | 770 | |
3b3b36dd | 771 | SCM_DEFINE (scm_string_append, "string-append", 0, 0, 1, |
6fa73e72 | 772 | (SCM args), |
0d26a824 MG |
773 | "Return a newly allocated string whose characters form the\n" |
774 | "concatenation of the given strings, @var{args}.") | |
1bbd0b84 | 775 | #define FUNC_NAME s_scm_string_append |
0f2d19dd JB |
776 | { |
777 | SCM res; | |
1be6b49c | 778 | size_t i = 0; |
c829a427 MV |
779 | SCM l, s; |
780 | char *data; | |
af45e3b0 DH |
781 | |
782 | SCM_VALIDATE_REST_ARGUMENT (args); | |
d2e53ed6 | 783 | for (l = args; !scm_is_null (l); l = SCM_CDR (l)) |
c829a427 MV |
784 | { |
785 | s = SCM_CAR (l); | |
786 | SCM_VALIDATE_STRING (SCM_ARGn, s); | |
3ee86942 | 787 | i += scm_i_string_length (s); |
c829a427 | 788 | } |
3ee86942 | 789 | res = scm_i_make_string (i, &data); |
d2e53ed6 | 790 | for (l = args; !scm_is_null (l); l = SCM_CDR (l)) |
c829a427 | 791 | { |
edea856c | 792 | size_t len; |
c829a427 | 793 | s = SCM_CAR (l); |
3ee86942 | 794 | SCM_VALIDATE_STRING (SCM_ARGn, s); |
edea856c | 795 | len = scm_i_string_length (s); |
3ee86942 MV |
796 | memcpy (data, scm_i_string_chars (s), len); |
797 | data += len; | |
c829a427 MV |
798 | scm_remember_upto_here_1 (s); |
799 | } | |
0f2d19dd JB |
800 | return res; |
801 | } | |
1bbd0b84 | 802 | #undef FUNC_NAME |
0f2d19dd | 803 | |
c829a427 MV |
804 | int |
805 | scm_is_string (SCM obj) | |
806 | { | |
3ee86942 | 807 | return IS_STRING (obj); |
c829a427 | 808 | } |
24933780 | 809 | |
c829a427 MV |
810 | SCM |
811 | scm_from_locale_stringn (const char *str, size_t len) | |
812 | { | |
813 | SCM res; | |
814 | char *dst; | |
4d4528e7 | 815 | |
c829a427 MV |
816 | if (len == (size_t)-1) |
817 | len = strlen (str); | |
3ee86942 | 818 | res = scm_i_make_string (len, &dst); |
c829a427 MV |
819 | memcpy (dst, str, len); |
820 | return res; | |
821 | } | |
4d4528e7 | 822 | |
c829a427 MV |
823 | SCM |
824 | scm_from_locale_string (const char *str) | |
4d4528e7 | 825 | { |
c829a427 MV |
826 | return scm_from_locale_stringn (str, -1); |
827 | } | |
4d4528e7 | 828 | |
c829a427 MV |
829 | SCM |
830 | scm_take_locale_stringn (char *str, size_t len) | |
831 | { | |
832 | if (len == (size_t)-1) | |
833 | return scm_take_locale_string (str); | |
834 | else | |
835 | { | |
836 | /* STR might not be zero terminated and we are not allowed to | |
837 | look at str[len], so we have to make a new one... | |
838 | */ | |
839 | SCM res = scm_from_locale_stringn (str, len); | |
840 | free (str); | |
841 | return res; | |
842 | } | |
843 | } | |
4d4528e7 | 844 | |
c829a427 MV |
845 | SCM |
846 | scm_take_locale_string (char *str) | |
847 | { | |
848 | size_t len = strlen (str); | |
3ee86942 | 849 | SCM buf, res; |
c829a427 | 850 | |
3ee86942 MV |
851 | buf = scm_double_cell (STRINGBUF_TAG, (scm_t_bits) str, |
852 | (scm_t_bits) len, (scm_t_bits) 0); | |
853 | res = scm_double_cell (STRING_TAG, | |
854 | SCM_UNPACK (buf), | |
855 | (scm_t_bits) 0, (scm_t_bits) len); | |
c829a427 | 856 | scm_gc_register_collectable_memory (str, len+1, "string"); |
c829a427 MV |
857 | return res; |
858 | } | |
859 | ||
860 | char * | |
861 | scm_to_locale_stringn (SCM str, size_t *lenp) | |
862 | { | |
863 | char *res; | |
864 | size_t len; | |
4d4528e7 | 865 | |
3ee86942 | 866 | if (!scm_is_string (str)) |
c829a427 | 867 | scm_wrong_type_arg_msg (NULL, 0, str, "string"); |
3ee86942 | 868 | len = scm_i_string_length (str); |
c829a427 | 869 | res = scm_malloc (len + ((lenp==NULL)? 1 : 0)); |
3ee86942 | 870 | memcpy (res, scm_i_string_chars (str), len); |
c829a427 MV |
871 | if (lenp == NULL) |
872 | { | |
873 | res[len] = '\0'; | |
874 | if (strlen (res) != len) | |
875 | { | |
876 | free (res); | |
877 | scm_misc_error (NULL, | |
878 | "string contains #\\nul character: ~S", | |
879 | scm_list_1 (str)); | |
880 | } | |
881 | } | |
882 | else | |
4d4528e7 | 883 | *lenp = len; |
24933780 | 884 | |
c829a427 MV |
885 | scm_remember_upto_here_1 (str); |
886 | return res; | |
4d4528e7 | 887 | } |
af68e5e5 | 888 | |
c829a427 MV |
889 | char * |
890 | scm_to_locale_string (SCM str) | |
891 | { | |
892 | return scm_to_locale_stringn (str, NULL); | |
893 | } | |
af68e5e5 | 894 | |
c829a427 MV |
895 | size_t |
896 | scm_to_locale_stringbuf (SCM str, char *buf, size_t max_len) | |
897 | { | |
898 | size_t len; | |
899 | ||
3ee86942 | 900 | if (!scm_is_string (str)) |
c829a427 | 901 | scm_wrong_type_arg_msg (NULL, 0, str, "string"); |
3ee86942 MV |
902 | len = scm_i_string_length (str); |
903 | memcpy (buf, scm_i_string_chars (str), (len > max_len)? max_len : len); | |
c829a427 MV |
904 | scm_remember_upto_here_1 (str); |
905 | return len; | |
906 | } | |
af68e5e5 | 907 | |
3ee86942 MV |
908 | /* converts C scm_array of strings to SCM scm_list of strings. */ |
909 | /* If argc < 0, a null terminated scm_array is assumed. */ | |
910 | SCM | |
911 | scm_makfromstrs (int argc, char **argv) | |
912 | { | |
913 | int i = argc; | |
914 | SCM lst = SCM_EOL; | |
915 | if (0 > i) | |
916 | for (i = 0; argv[i]; i++); | |
917 | while (i--) | |
918 | lst = scm_cons (scm_from_locale_string (argv[i]), lst); | |
919 | return lst; | |
920 | } | |
921 | ||
c829a427 MV |
922 | /* Return a newly allocated array of char pointers to each of the strings |
923 | in args, with a terminating NULL pointer. */ | |
924 | ||
925 | char ** | |
926 | scm_i_allocate_string_pointers (SCM list) | |
af68e5e5 | 927 | { |
c829a427 MV |
928 | char **result; |
929 | int len = scm_ilength (list); | |
930 | int i; | |
931 | ||
932 | if (len < 0) | |
933 | scm_wrong_type_arg_msg (NULL, 0, list, "proper list"); | |
934 | ||
935 | scm_frame_begin (0); | |
936 | ||
937 | result = (char **) scm_malloc ((len + 1) * sizeof (char *)); | |
938 | result[len] = NULL; | |
939 | scm_frame_unwind_handler (free, result, 0); | |
940 | ||
941 | /* The list might be have been modified in another thread, so | |
942 | we check LIST before each access. | |
943 | */ | |
d2e53ed6 | 944 | for (i = 0; i < len && scm_is_pair (list); i++) |
c829a427 MV |
945 | { |
946 | result[i] = scm_to_locale_string (SCM_CAR (list)); | |
947 | list = SCM_CDR (list); | |
948 | } | |
949 | ||
950 | scm_frame_end (); | |
951 | return result; | |
af68e5e5 | 952 | } |
e53cc817 | 953 | |
c829a427 MV |
954 | void |
955 | scm_i_free_string_pointers (char **pointers) | |
956 | { | |
957 | int i; | |
958 | ||
959 | for (i = 0; pointers[i]; i++) | |
960 | free (pointers[i]); | |
961 | free (pointers); | |
962 | } | |
24933780 | 963 | |
6f14f578 MV |
964 | void |
965 | scm_i_get_substring_spec (size_t len, | |
966 | SCM start, size_t *cstart, | |
967 | SCM end, size_t *cend) | |
968 | { | |
969 | if (SCM_UNBNDP (start)) | |
970 | *cstart = 0; | |
971 | else | |
972 | *cstart = scm_to_unsigned_integer (start, 0, len); | |
973 | ||
974 | if (SCM_UNBNDP (end)) | |
975 | *cend = len; | |
976 | else | |
977 | *cend = scm_to_unsigned_integer (end, *cstart, len); | |
978 | } | |
979 | ||
3ee86942 MV |
980 | #if SCM_ENABLE_DEPRECATED |
981 | ||
556d75db MV |
982 | /* When these definitions are removed, it becomes reasonable to use |
983 | read-only strings for string literals. For that, change the reader | |
984 | to create string literals with scm_c_substring_read_only instead of | |
985 | with scm_c_substring_copy. | |
986 | */ | |
987 | ||
3ee86942 | 988 | int |
fe78c51a | 989 | scm_i_deprecated_stringp (SCM str) |
3ee86942 MV |
990 | { |
991 | scm_c_issue_deprecation_warning | |
992 | ("SCM_STRINGP is deprecated. Use scm_is_string instead."); | |
993 | ||
2616f0e0 | 994 | return scm_is_string (str); |
3ee86942 MV |
995 | } |
996 | ||
997 | char * | |
fe78c51a | 998 | scm_i_deprecated_string_chars (SCM str) |
3ee86942 MV |
999 | { |
1000 | char *chars; | |
1001 | ||
1002 | scm_c_issue_deprecation_warning | |
1003 | ("SCM_STRING_CHARS is deprecated. See the manual for alternatives."); | |
1004 | ||
2616f0e0 MV |
1005 | /* We don't accept shared substrings here since they are not |
1006 | null-terminated. | |
1007 | */ | |
1008 | if (IS_SH_STRING (str)) | |
1009 | scm_misc_error (NULL, | |
1010 | "SCM_STRING_CHARS does not work with shared substrings.", | |
1011 | SCM_EOL); | |
1012 | ||
556d75db MV |
1013 | /* We explicitely test for read-only strings to produce a better |
1014 | error message. | |
1015 | */ | |
1016 | ||
1017 | if (IS_RO_STRING (str)) | |
1018 | scm_misc_error (NULL, | |
1019 | "SCM_STRING_CHARS does not work with read-only strings.", | |
1020 | SCM_EOL); | |
1021 | ||
2616f0e0 | 1022 | /* The following is still wrong, of course... |
3ee86942 MV |
1023 | */ |
1024 | chars = scm_i_string_writable_chars (str); | |
1025 | scm_i_string_stop_writing (); | |
1026 | return chars; | |
1027 | } | |
1028 | ||
1029 | size_t | |
fe78c51a | 1030 | scm_i_deprecated_string_length (SCM str) |
3ee86942 MV |
1031 | { |
1032 | scm_c_issue_deprecation_warning | |
1033 | ("SCM_STRING_LENGTH is deprecated. Use scm_c_string_length instead."); | |
1034 | return scm_c_string_length (str); | |
1035 | } | |
1036 | ||
1037 | #endif | |
1038 | ||
0f2d19dd JB |
1039 | void |
1040 | scm_init_strings () | |
0f2d19dd | 1041 | { |
3ee86942 | 1042 | scm_nullstr = scm_i_make_string (0, NULL); |
7c33806a | 1043 | |
a0599745 | 1044 | #include "libguile/strings.x" |
0f2d19dd JB |
1045 | } |
1046 | ||
89e00824 ML |
1047 | |
1048 | /* | |
1049 | Local Variables: | |
1050 | c-file-style: "gnu" | |
1051 | End: | |
1052 | */ |