Commit | Line | Data |
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7f74cf9a | 1 | /* Copyright (C) 1995,1996,1998,2000,2001, 2004, 2006, 2008 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 | |
92205699 | 15 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
73be1d9e | 16 | */ |
1bbd0b84 | 17 | |
1bbd0b84 | 18 | |
0f2d19dd | 19 | \f |
dbb605f5 LC |
20 | #ifdef HAVE_CONFIG_H |
21 | # include <config.h> | |
22 | #endif | |
0f2d19dd | 23 | |
faf2c9d7 | 24 | #include <string.h> |
3ee86942 | 25 | #include <stdio.h> |
faf2c9d7 | 26 | |
a0599745 MD |
27 | #include "libguile/_scm.h" |
28 | #include "libguile/chars.h" | |
7c33806a | 29 | #include "libguile/root.h" |
a0599745 | 30 | #include "libguile/strings.h" |
1afff620 | 31 | #include "libguile/deprecation.h" |
a0599745 | 32 | #include "libguile/validate.h" |
c829a427 | 33 | #include "libguile/dynwind.h" |
1afff620 | 34 | |
0f2d19dd JB |
35 | \f |
36 | ||
37 | /* {Strings} | |
38 | */ | |
39 | ||
3ee86942 MV |
40 | |
41 | /* Stringbufs | |
42 | * | |
43 | * XXX - keeping an accurate refcount during GC seems to be quite | |
44 | * tricky, so we just keep score of whether a stringbuf might be | |
45 | * shared, not wether it definitely is. | |
46 | * | |
47 | * The scheme I (mvo) tried to keep an accurate reference count would | |
48 | * recount all strings that point to a stringbuf during the mark-phase | |
49 | * of the GC. This was done since one cannot access the stringbuf of | |
50 | * a string when that string is freed (in order to decrease the | |
51 | * reference count). The memory of the stringbuf might have been | |
52 | * reused already for something completely different. | |
53 | * | |
54 | * This recounted worked for a small number of threads beating on | |
55 | * cow-strings, but it failed randomly with more than 10 threads, say. | |
56 | * I couldn't figure out what went wrong, so I used the conservative | |
57 | * approach implemented below. | |
58 | * | |
59 | * A stringbuf needs to know its length, but only so that it can be | |
60 | * reported when the stringbuf is freed. | |
61 | * | |
62 | * Stringbufs (and strings) are not stored very compactly: a stringbuf | |
63 | * has room for about 2*sizeof(scm_t_bits)-1 bytes additional | |
64 | * information. As a compensation, the code below is made more | |
65 | * complicated by storing small strings inline in the double cell of a | |
66 | * stringbuf. So we have fixstrings and bigstrings... | |
67 | */ | |
68 | ||
69 | #define STRINGBUF_F_SHARED 0x100 | |
70 | #define STRINGBUF_F_INLINE 0x200 | |
71 | ||
72 | #define STRINGBUF_TAG scm_tc7_stringbuf | |
73 | #define STRINGBUF_SHARED(buf) (SCM_CELL_WORD_0(buf) & STRINGBUF_F_SHARED) | |
74 | #define STRINGBUF_INLINE(buf) (SCM_CELL_WORD_0(buf) & STRINGBUF_F_INLINE) | |
75 | ||
76 | #define STRINGBUF_OUTLINE_CHARS(buf) ((char *)SCM_CELL_WORD_1(buf)) | |
77 | #define STRINGBUF_OUTLINE_LENGTH(buf) (SCM_CELL_WORD_2(buf)) | |
78 | #define STRINGBUF_INLINE_CHARS(buf) ((char *)SCM_CELL_OBJECT_LOC(buf,1)) | |
79 | #define STRINGBUF_INLINE_LENGTH(buf) (((size_t)SCM_CELL_WORD_0(buf))>>16) | |
80 | ||
81 | #define STRINGBUF_CHARS(buf) (STRINGBUF_INLINE (buf) \ | |
82 | ? STRINGBUF_INLINE_CHARS (buf) \ | |
83 | : STRINGBUF_OUTLINE_CHARS (buf)) | |
84 | #define STRINGBUF_LENGTH(buf) (STRINGBUF_INLINE (buf) \ | |
85 | ? STRINGBUF_INLINE_LENGTH (buf) \ | |
86 | : STRINGBUF_OUTLINE_LENGTH (buf)) | |
87 | ||
88 | #define STRINGBUF_MAX_INLINE_LEN (3*sizeof(scm_t_bits)) | |
89 | ||
90 | #define SET_STRINGBUF_SHARED(buf) \ | |
91 | (SCM_SET_CELL_WORD_0 ((buf), SCM_CELL_WORD_0 (buf) | STRINGBUF_F_SHARED)) | |
92 | ||
93 | #if SCM_DEBUG | |
94 | static size_t lenhist[1001]; | |
95 | #endif | |
96 | ||
97 | static SCM | |
98 | make_stringbuf (size_t len) | |
0f2d19dd | 99 | { |
3ee86942 MV |
100 | /* XXX - for the benefit of SCM_STRING_CHARS, SCM_SYMBOL_CHARS and |
101 | scm_i_symbol_chars, all stringbufs are null-terminated. Once | |
102 | SCM_STRING_CHARS and SCM_SYMBOL_CHARS are removed and the code | |
103 | has been changed for scm_i_symbol_chars, this null-termination | |
104 | can be dropped. | |
105 | */ | |
106 | ||
107 | #if SCM_DEBUG | |
108 | if (len < 1000) | |
109 | lenhist[len]++; | |
110 | else | |
111 | lenhist[1000]++; | |
112 | #endif | |
0f2d19dd | 113 | |
3ee86942 MV |
114 | if (len <= STRINGBUF_MAX_INLINE_LEN-1) |
115 | { | |
116 | return scm_double_cell (STRINGBUF_TAG | STRINGBUF_F_INLINE | (len << 16), | |
117 | 0, 0, 0); | |
118 | } | |
119 | else | |
120 | { | |
c5018a2b | 121 | char *mem = scm_gc_malloc_pointerless (len + 1, "string"); |
3ee86942 MV |
122 | mem[len] = '\0'; |
123 | return scm_double_cell (STRINGBUF_TAG, (scm_t_bits) mem, | |
124 | (scm_t_bits) len, (scm_t_bits) 0); | |
125 | } | |
126 | } | |
e53cc817 | 127 | |
2b829bbb KR |
128 | /* Return a new stringbuf whose underlying storage consists of the LEN+1 |
129 | octets pointed to by STR (the last octet is zero). */ | |
7f74cf9a | 130 | SCM |
fd0a5bbc HWN |
131 | scm_i_take_stringbufn (char *str, size_t len) |
132 | { | |
2b829bbb | 133 | scm_gc_register_collectable_memory (str, len + 1, "stringbuf"); |
fd0a5bbc HWN |
134 | |
135 | return scm_double_cell (STRINGBUF_TAG, (scm_t_bits) str, | |
136 | (scm_t_bits) len, (scm_t_bits) 0); | |
137 | } | |
138 | ||
bd9e24b3 | 139 | |
9de87eea | 140 | scm_i_pthread_mutex_t stringbuf_write_mutex = SCM_I_PTHREAD_MUTEX_INITIALIZER; |
bd9e24b3 | 141 | |
3ee86942 MV |
142 | /* Copy-on-write strings. |
143 | */ | |
bd9e24b3 | 144 | |
3ee86942 | 145 | #define STRING_TAG scm_tc7_string |
bd9e24b3 | 146 | |
3ee86942 MV |
147 | #define STRING_STRINGBUF(str) (SCM_CELL_OBJECT_1(str)) |
148 | #define STRING_START(str) ((size_t)SCM_CELL_WORD_2(str)) | |
149 | #define STRING_LENGTH(str) ((size_t)SCM_CELL_WORD_3(str)) | |
bd9e24b3 | 150 | |
3ee86942 MV |
151 | #define SET_STRING_STRINGBUF(str,buf) (SCM_SET_CELL_OBJECT_1(str,buf)) |
152 | #define SET_STRING_START(str,start) (SCM_SET_CELL_WORD_2(str,start)) | |
153 | ||
154 | #define IS_STRING(str) (SCM_NIMP(str) && SCM_TYP7(str) == STRING_TAG) | |
155 | ||
ed35de72 MV |
156 | /* Read-only strings. |
157 | */ | |
158 | ||
159 | #define RO_STRING_TAG (scm_tc7_string + 0x200) | |
160 | #define IS_RO_STRING(str) (SCM_CELL_TYPE(str)==RO_STRING_TAG) | |
161 | ||
e1b29f6a MV |
162 | /* Mutation-sharing substrings |
163 | */ | |
164 | ||
165 | #define SH_STRING_TAG (scm_tc7_string + 0x100) | |
166 | ||
167 | #define SH_STRING_STRING(sh) (SCM_CELL_OBJECT_1(sh)) | |
168 | /* START and LENGTH as for STRINGs. */ | |
169 | ||
170 | #define IS_SH_STRING(str) (SCM_CELL_TYPE(str)==SH_STRING_TAG) | |
171 | ||
3ee86942 MV |
172 | SCM |
173 | scm_i_make_string (size_t len, char **charsp) | |
174 | { | |
175 | SCM buf = make_stringbuf (len); | |
176 | SCM res; | |
177 | if (charsp) | |
178 | *charsp = STRINGBUF_CHARS (buf); | |
179 | res = scm_double_cell (STRING_TAG, SCM_UNPACK(buf), | |
180 | (scm_t_bits)0, (scm_t_bits) len); | |
181 | return res; | |
0f2d19dd JB |
182 | } |
183 | ||
3ee86942 MV |
184 | static void |
185 | validate_substring_args (SCM str, size_t start, size_t end) | |
186 | { | |
187 | if (!IS_STRING (str)) | |
188 | scm_wrong_type_arg_msg (NULL, 0, str, "string"); | |
189 | if (start > STRING_LENGTH (str)) | |
190 | scm_out_of_range (NULL, scm_from_size_t (start)); | |
191 | if (end > STRING_LENGTH (str) || end < start) | |
192 | scm_out_of_range (NULL, scm_from_size_t (end)); | |
193 | } | |
0f2d19dd | 194 | |
e1b29f6a MV |
195 | static inline void |
196 | get_str_buf_start (SCM *str, SCM *buf, size_t *start) | |
197 | { | |
198 | *start = STRING_START (*str); | |
199 | if (IS_SH_STRING (*str)) | |
200 | { | |
201 | *str = SH_STRING_STRING (*str); | |
202 | *start += STRING_START (*str); | |
203 | } | |
204 | *buf = STRING_STRINGBUF (*str); | |
205 | } | |
206 | ||
3ee86942 MV |
207 | SCM |
208 | scm_i_substring (SCM str, size_t start, size_t end) | |
0f2d19dd | 209 | { |
e1b29f6a MV |
210 | SCM buf; |
211 | size_t str_start; | |
212 | get_str_buf_start (&str, &buf, &str_start); | |
9de87eea | 213 | scm_i_pthread_mutex_lock (&stringbuf_write_mutex); |
3ee86942 | 214 | SET_STRINGBUF_SHARED (buf); |
9de87eea | 215 | scm_i_pthread_mutex_unlock (&stringbuf_write_mutex); |
3ee86942 | 216 | return scm_double_cell (STRING_TAG, SCM_UNPACK(buf), |
e1b29f6a MV |
217 | (scm_t_bits)str_start + start, |
218 | (scm_t_bits) end - start); | |
0f2d19dd JB |
219 | } |
220 | ||
ed35de72 MV |
221 | SCM |
222 | scm_i_substring_read_only (SCM str, size_t start, size_t end) | |
223 | { | |
45a9f430 LC |
224 | SCM buf; |
225 | size_t str_start; | |
226 | get_str_buf_start (&str, &buf, &str_start); | |
227 | scm_i_pthread_mutex_lock (&stringbuf_write_mutex); | |
228 | SET_STRINGBUF_SHARED (buf); | |
229 | scm_i_pthread_mutex_unlock (&stringbuf_write_mutex); | |
230 | return scm_double_cell (RO_STRING_TAG, SCM_UNPACK(buf), | |
231 | (scm_t_bits)str_start + start, | |
232 | (scm_t_bits) end - start); | |
ed35de72 MV |
233 | } |
234 | ||
3ee86942 MV |
235 | SCM |
236 | scm_i_substring_copy (SCM str, size_t start, size_t end) | |
237 | { | |
238 | size_t len = end - start; | |
edea856c | 239 | SCM buf, my_buf; |
e1b29f6a MV |
240 | size_t str_start; |
241 | get_str_buf_start (&str, &buf, &str_start); | |
edea856c | 242 | my_buf = make_stringbuf (len); |
e1b29f6a MV |
243 | memcpy (STRINGBUF_CHARS (my_buf), |
244 | STRINGBUF_CHARS (buf) + str_start + start, len); | |
3ee86942 MV |
245 | scm_remember_upto_here_1 (buf); |
246 | return scm_double_cell (STRING_TAG, SCM_UNPACK(my_buf), | |
247 | (scm_t_bits)0, (scm_t_bits) len); | |
248 | } | |
0f2d19dd | 249 | |
e1b29f6a MV |
250 | SCM |
251 | scm_i_substring_shared (SCM str, size_t start, size_t end) | |
252 | { | |
253 | if (start == 0 && end == STRING_LENGTH (str)) | |
254 | return str; | |
255 | else | |
256 | { | |
257 | size_t len = end - start; | |
258 | if (IS_SH_STRING (str)) | |
259 | { | |
260 | start += STRING_START (str); | |
261 | str = SH_STRING_STRING (str); | |
262 | } | |
263 | return scm_double_cell (SH_STRING_TAG, SCM_UNPACK(str), | |
264 | (scm_t_bits)start, (scm_t_bits) len); | |
265 | } | |
266 | } | |
267 | ||
3ee86942 MV |
268 | SCM |
269 | scm_c_substring (SCM str, size_t start, size_t end) | |
270 | { | |
271 | validate_substring_args (str, start, end); | |
272 | return scm_i_substring (str, start, end); | |
273 | } | |
ee149d03 | 274 | |
ed35de72 MV |
275 | SCM |
276 | scm_c_substring_read_only (SCM str, size_t start, size_t end) | |
277 | { | |
278 | validate_substring_args (str, start, end); | |
279 | return scm_i_substring_read_only (str, start, end); | |
280 | } | |
281 | ||
0f2d19dd | 282 | SCM |
3ee86942 | 283 | scm_c_substring_copy (SCM str, size_t start, size_t end) |
0f2d19dd | 284 | { |
3ee86942 MV |
285 | validate_substring_args (str, start, end); |
286 | return scm_i_substring_copy (str, start, end); | |
287 | } | |
288 | ||
3ee86942 MV |
289 | SCM |
290 | scm_c_substring_shared (SCM str, size_t start, size_t end) | |
291 | { | |
292 | validate_substring_args (str, start, end); | |
293 | return scm_i_substring_shared (str, start, end); | |
294 | } | |
0f2d19dd | 295 | |
d6c74168 | 296 | \f |
3ee86942 MV |
297 | /* Internal accessors |
298 | */ | |
299 | ||
300 | size_t | |
301 | scm_i_string_length (SCM str) | |
0f2d19dd | 302 | { |
3ee86942 | 303 | return STRING_LENGTH (str); |
0f2d19dd JB |
304 | } |
305 | ||
3ee86942 MV |
306 | const char * |
307 | scm_i_string_chars (SCM str) | |
308 | { | |
309 | SCM buf; | |
e1b29f6a MV |
310 | size_t start; |
311 | get_str_buf_start (&str, &buf, &start); | |
3ee86942 MV |
312 | return STRINGBUF_CHARS (buf) + start; |
313 | } | |
b00418df | 314 | |
3ee86942 | 315 | char * |
ed35de72 | 316 | scm_i_string_writable_chars (SCM orig_str) |
b00418df | 317 | { |
ed35de72 | 318 | SCM buf, str = orig_str; |
e1b29f6a | 319 | size_t start; |
ed35de72 | 320 | |
e1b29f6a | 321 | get_str_buf_start (&str, &buf, &start); |
ed35de72 MV |
322 | if (IS_RO_STRING (str)) |
323 | scm_misc_error (NULL, "string is read-only: ~s", scm_list_1 (orig_str)); | |
324 | ||
9de87eea | 325 | scm_i_pthread_mutex_lock (&stringbuf_write_mutex); |
3ee86942 MV |
326 | if (STRINGBUF_SHARED (buf)) |
327 | { | |
902578f1 | 328 | /* Clone stringbuf. */ |
3ee86942 MV |
329 | |
330 | size_t len = STRING_LENGTH (str); | |
331 | SCM new_buf; | |
332 | ||
9de87eea | 333 | scm_i_pthread_mutex_unlock (&stringbuf_write_mutex); |
3ee86942 MV |
334 | |
335 | new_buf = make_stringbuf (len); | |
336 | memcpy (STRINGBUF_CHARS (new_buf), | |
337 | STRINGBUF_CHARS (buf) + STRING_START (str), len); | |
338 | ||
3ee86942 | 339 | start -= STRING_START (str); |
902578f1 LC |
340 | |
341 | /* FIXME: The following operations are not atomic, so other threads | |
342 | looking at STR may see an inconsistent state. Nevertheless it can't | |
343 | hurt much since (i) accessing STR while it is being mutated can't | |
344 | yield a crash, and (ii) concurrent accesses to STR should be | |
345 | protected by a mutex at the application level. The latter may not | |
346 | apply when STR != ORIG_STR, though. */ | |
3ee86942 | 347 | SET_STRING_START (str, 0); |
902578f1 | 348 | SET_STRING_STRINGBUF (str, new_buf); |
3ee86942 MV |
349 | |
350 | buf = new_buf; | |
351 | ||
9de87eea | 352 | scm_i_pthread_mutex_lock (&stringbuf_write_mutex); |
3ee86942 MV |
353 | } |
354 | ||
355 | return STRINGBUF_CHARS (buf) + start; | |
b00418df DH |
356 | } |
357 | ||
3ee86942 MV |
358 | void |
359 | scm_i_string_stop_writing (void) | |
360 | { | |
9de87eea | 361 | scm_i_pthread_mutex_unlock (&stringbuf_write_mutex); |
3ee86942 | 362 | } |
b00418df | 363 | |
3ee86942 MV |
364 | /* Symbols. |
365 | ||
366 | Basic symbol creation and accessing is done here, the rest is in | |
367 | symbols.[hc]. This has been done to keep stringbufs and the | |
368 | internals of strings and string-like objects confined to this file. | |
369 | */ | |
370 | ||
371 | #define SYMBOL_STRINGBUF SCM_CELL_OBJECT_1 | |
372 | ||
373 | SCM | |
6869328b MV |
374 | scm_i_make_symbol (SCM name, scm_t_bits flags, |
375 | unsigned long hash, SCM props) | |
3ee86942 MV |
376 | { |
377 | SCM buf; | |
378 | size_t start = STRING_START (name); | |
379 | size_t length = STRING_LENGTH (name); | |
380 | ||
381 | if (IS_SH_STRING (name)) | |
382 | { | |
383 | name = SH_STRING_STRING (name); | |
384 | start += STRING_START (name); | |
385 | } | |
386 | buf = SYMBOL_STRINGBUF (name); | |
387 | ||
388 | if (start == 0 && length == STRINGBUF_LENGTH (buf)) | |
389 | { | |
390 | /* reuse buf. */ | |
9de87eea | 391 | scm_i_pthread_mutex_lock (&stringbuf_write_mutex); |
3ee86942 | 392 | SET_STRINGBUF_SHARED (buf); |
9de87eea | 393 | scm_i_pthread_mutex_unlock (&stringbuf_write_mutex); |
3ee86942 MV |
394 | } |
395 | else | |
396 | { | |
397 | /* make new buf. */ | |
398 | SCM new_buf = make_stringbuf (length); | |
399 | memcpy (STRINGBUF_CHARS (new_buf), | |
400 | STRINGBUF_CHARS (buf) + start, length); | |
401 | buf = new_buf; | |
402 | } | |
6869328b | 403 | return scm_double_cell (scm_tc7_symbol | flags, SCM_UNPACK (buf), |
3ee86942 MV |
404 | (scm_t_bits) hash, SCM_UNPACK (props)); |
405 | } | |
406 | ||
fd0a5bbc HWN |
407 | SCM |
408 | scm_i_c_make_symbol (const char *name, size_t len, | |
409 | scm_t_bits flags, unsigned long hash, SCM props) | |
410 | { | |
411 | SCM buf = make_stringbuf (len); | |
412 | memcpy (STRINGBUF_CHARS (buf), name, len); | |
413 | ||
a284cc7e LC |
414 | return scm_immutable_double_cell (scm_tc7_symbol | flags, SCM_UNPACK (buf), |
415 | (scm_t_bits) hash, SCM_UNPACK (props)); | |
fd0a5bbc HWN |
416 | } |
417 | ||
418 | /* Return a new symbol that uses the LEN bytes pointed to by NAME as its | |
419 | underlying storage. */ | |
420 | SCM | |
421 | scm_i_c_take_symbol (char *name, size_t len, | |
422 | scm_t_bits flags, unsigned long hash, SCM props) | |
423 | { | |
424 | SCM buf = scm_i_take_stringbufn (name, len); | |
425 | ||
426 | return scm_double_cell (scm_tc7_symbol | flags, SCM_UNPACK (buf), | |
427 | (scm_t_bits) hash, SCM_UNPACK (props)); | |
428 | } | |
429 | ||
3ee86942 MV |
430 | size_t |
431 | scm_i_symbol_length (SCM sym) | |
0f2d19dd | 432 | { |
3ee86942 | 433 | return STRINGBUF_LENGTH (SYMBOL_STRINGBUF (sym)); |
0f2d19dd JB |
434 | } |
435 | ||
071bb6a8 LC |
436 | size_t |
437 | scm_c_symbol_length (SCM sym) | |
438 | #define FUNC_NAME "scm_c_symbol_length" | |
439 | { | |
440 | SCM_VALIDATE_SYMBOL (1, sym); | |
441 | ||
442 | return STRINGBUF_LENGTH (SYMBOL_STRINGBUF (sym)); | |
443 | } | |
444 | #undef FUNC_NAME | |
445 | ||
3ee86942 MV |
446 | const char * |
447 | scm_i_symbol_chars (SCM sym) | |
448 | { | |
449 | SCM buf = SYMBOL_STRINGBUF (sym); | |
450 | return STRINGBUF_CHARS (buf); | |
451 | } | |
1cc91f1b | 452 | |
be54b15d | 453 | SCM |
3ee86942 | 454 | scm_i_symbol_substring (SCM sym, size_t start, size_t end) |
be54b15d | 455 | { |
3ee86942 | 456 | SCM buf = SYMBOL_STRINGBUF (sym); |
9de87eea | 457 | scm_i_pthread_mutex_lock (&stringbuf_write_mutex); |
3ee86942 | 458 | SET_STRINGBUF_SHARED (buf); |
9de87eea | 459 | scm_i_pthread_mutex_unlock (&stringbuf_write_mutex); |
fd2b17b9 | 460 | return scm_double_cell (RO_STRING_TAG, SCM_UNPACK (buf), |
3ee86942 MV |
461 | (scm_t_bits)start, (scm_t_bits) end - start); |
462 | } | |
be54b15d | 463 | |
3ee86942 MV |
464 | /* Debugging |
465 | */ | |
be54b15d | 466 | |
3ee86942 | 467 | #if SCM_DEBUG |
be54b15d | 468 | |
3ee86942 MV |
469 | SCM scm_sys_string_dump (SCM); |
470 | SCM scm_sys_symbol_dump (SCM); | |
471 | SCM scm_sys_stringbuf_hist (void); | |
be54b15d | 472 | |
3ee86942 MV |
473 | SCM_DEFINE (scm_sys_string_dump, "%string-dump", 1, 0, 0, |
474 | (SCM str), | |
475 | "") | |
476 | #define FUNC_NAME s_scm_sys_string_dump | |
477 | { | |
478 | SCM_VALIDATE_STRING (1, str); | |
479 | fprintf (stderr, "%p:\n", str); | |
480 | fprintf (stderr, " start: %u\n", STRING_START (str)); | |
481 | fprintf (stderr, " len: %u\n", STRING_LENGTH (str)); | |
482 | if (IS_SH_STRING (str)) | |
483 | { | |
484 | fprintf (stderr, " string: %p\n", SH_STRING_STRING (str)); | |
485 | fprintf (stderr, "\n"); | |
486 | scm_sys_string_dump (SH_STRING_STRING (str)); | |
487 | } | |
488 | else | |
489 | { | |
490 | SCM buf = STRING_STRINGBUF (str); | |
491 | fprintf (stderr, " buf: %p\n", buf); | |
492 | fprintf (stderr, " chars: %p\n", STRINGBUF_CHARS (buf)); | |
493 | fprintf (stderr, " length: %u\n", STRINGBUF_LENGTH (buf)); | |
494 | fprintf (stderr, " flags: %x\n", (SCM_CELL_WORD_0 (buf) & 0x300)); | |
495 | } | |
496 | return SCM_UNSPECIFIED; | |
497 | } | |
498 | #undef FUNC_NAME | |
499 | ||
500 | SCM_DEFINE (scm_sys_symbol_dump, "%symbol-dump", 1, 0, 0, | |
501 | (SCM sym), | |
502 | "") | |
503 | #define FUNC_NAME s_scm_sys_symbol_dump | |
504 | { | |
505 | SCM_VALIDATE_SYMBOL (1, sym); | |
506 | fprintf (stderr, "%p:\n", sym); | |
507 | fprintf (stderr, " hash: %lu\n", scm_i_symbol_hash (sym)); | |
508 | { | |
509 | SCM buf = SYMBOL_STRINGBUF (sym); | |
510 | fprintf (stderr, " buf: %p\n", buf); | |
511 | fprintf (stderr, " chars: %p\n", STRINGBUF_CHARS (buf)); | |
512 | fprintf (stderr, " length: %u\n", STRINGBUF_LENGTH (buf)); | |
513 | fprintf (stderr, " shared: %u\n", STRINGBUF_SHARED (buf)); | |
514 | } | |
515 | return SCM_UNSPECIFIED; | |
516 | } | |
517 | #undef FUNC_NAME | |
518 | ||
519 | SCM_DEFINE (scm_sys_stringbuf_hist, "%stringbuf-hist", 0, 0, 0, | |
520 | (void), | |
521 | "") | |
e1b29f6a | 522 | #define FUNC_NAME s_scm_sys_stringbuf_hist |
3ee86942 MV |
523 | { |
524 | int i; | |
525 | for (i = 0; i < 1000; i++) | |
526 | if (lenhist[i]) | |
527 | fprintf (stderr, " %3d: %u\n", i, lenhist[i]); | |
528 | fprintf (stderr, ">999: %u\n", lenhist[1000]); | |
529 | return SCM_UNSPECIFIED; | |
be54b15d DH |
530 | } |
531 | #undef FUNC_NAME | |
532 | ||
3ee86942 MV |
533 | #endif |
534 | ||
535 | \f | |
536 | ||
537 | SCM_DEFINE (scm_string_p, "string?", 1, 0, 0, | |
538 | (SCM obj), | |
539 | "Return @code{#t} if @var{obj} is a string, else @code{#f}.") | |
540 | #define FUNC_NAME s_scm_string_p | |
541 | { | |
542 | return scm_from_bool (IS_STRING (obj)); | |
543 | } | |
544 | #undef FUNC_NAME | |
545 | ||
546 | ||
547 | SCM_REGISTER_PROC (s_scm_list_to_string, "list->string", 1, 0, 0, scm_string); | |
548 | ||
549 | SCM_DEFINE (scm_string, "string", 0, 0, 1, | |
550 | (SCM chrs), | |
551 | "@deffnx {Scheme Procedure} list->string chrs\n" | |
552 | "Return a newly allocated string composed of the arguments,\n" | |
553 | "@var{chrs}.") | |
554 | #define FUNC_NAME s_scm_string | |
555 | { | |
556 | SCM result; | |
557 | size_t len; | |
558 | char *data; | |
559 | ||
560 | { | |
561 | long i = scm_ilength (chrs); | |
562 | ||
563 | SCM_ASSERT (i >= 0, chrs, SCM_ARG1, FUNC_NAME); | |
564 | len = i; | |
565 | } | |
566 | ||
567 | result = scm_i_make_string (len, &data); | |
d2e53ed6 | 568 | while (len > 0 && scm_is_pair (chrs)) |
3ee86942 MV |
569 | { |
570 | SCM elt = SCM_CAR (chrs); | |
571 | ||
572 | SCM_VALIDATE_CHAR (SCM_ARGn, elt); | |
573 | *data++ = SCM_CHAR (elt); | |
574 | chrs = SCM_CDR (chrs); | |
575 | len--; | |
576 | } | |
577 | if (len > 0) | |
578 | scm_misc_error (NULL, "list changed while constructing string", SCM_EOL); | |
d2e53ed6 | 579 | if (!scm_is_null (chrs)) |
3ee86942 MV |
580 | scm_wrong_type_arg_msg (NULL, 0, chrs, "proper list"); |
581 | ||
582 | return result; | |
583 | } | |
584 | #undef FUNC_NAME | |
be54b15d | 585 | |
3b3b36dd | 586 | SCM_DEFINE (scm_make_string, "make-string", 1, 1, 0, |
6fa73e72 | 587 | (SCM k, SCM chr), |
0d26a824 MG |
588 | "Return a newly allocated string of\n" |
589 | "length @var{k}. If @var{chr} is given, then all elements of\n" | |
590 | "the string are initialized to @var{chr}, otherwise the contents\n" | |
9401323e | 591 | "of the @var{string} are unspecified.") |
1bbd0b84 | 592 | #define FUNC_NAME s_scm_make_string |
0f2d19dd | 593 | { |
3ee86942 MV |
594 | return scm_c_make_string (scm_to_size_t (k), chr); |
595 | } | |
596 | #undef FUNC_NAME | |
597 | ||
598 | SCM | |
599 | scm_c_make_string (size_t len, SCM chr) | |
600 | #define FUNC_NAME NULL | |
601 | { | |
602 | char *dst; | |
603 | SCM res = scm_i_make_string (len, &dst); | |
cb0d8be2 | 604 | |
e11e83f3 MV |
605 | if (!SCM_UNBNDP (chr)) |
606 | { | |
3ee86942 MV |
607 | SCM_VALIDATE_CHAR (0, chr); |
608 | memset (dst, SCM_CHAR (chr), len); | |
0f2d19dd | 609 | } |
e11e83f3 MV |
610 | |
611 | return res; | |
0f2d19dd | 612 | } |
1bbd0b84 | 613 | #undef FUNC_NAME |
0f2d19dd | 614 | |
3b3b36dd | 615 | SCM_DEFINE (scm_string_length, "string-length", 1, 0, 0, |
0d26a824 MG |
616 | (SCM string), |
617 | "Return the number of characters in @var{string}.") | |
1bbd0b84 | 618 | #define FUNC_NAME s_scm_string_length |
0f2d19dd | 619 | { |
d1ca2c64 | 620 | SCM_VALIDATE_STRING (1, string); |
3ee86942 | 621 | return scm_from_size_t (STRING_LENGTH (string)); |
0f2d19dd | 622 | } |
1bbd0b84 | 623 | #undef FUNC_NAME |
0f2d19dd | 624 | |
3ee86942 MV |
625 | size_t |
626 | scm_c_string_length (SCM string) | |
627 | { | |
628 | if (!IS_STRING (string)) | |
629 | scm_wrong_type_arg_msg (NULL, 0, string, "string"); | |
630 | return STRING_LENGTH (string); | |
631 | } | |
632 | ||
bd9e24b3 | 633 | SCM_DEFINE (scm_string_ref, "string-ref", 2, 0, 0, |
6fa73e72 | 634 | (SCM str, SCM k), |
0d26a824 MG |
635 | "Return character @var{k} of @var{str} using zero-origin\n" |
636 | "indexing. @var{k} must be a valid index of @var{str}.") | |
1bbd0b84 | 637 | #define FUNC_NAME s_scm_string_ref |
0f2d19dd | 638 | { |
3ae3166b | 639 | size_t len; |
a55c2b68 | 640 | unsigned long idx; |
bd9e24b3 | 641 | |
d1ca2c64 | 642 | SCM_VALIDATE_STRING (1, str); |
3ae3166b LC |
643 | |
644 | len = scm_i_string_length (str); | |
645 | if (SCM_LIKELY (len > 0)) | |
646 | idx = scm_to_unsigned_integer (k, 0, len - 1); | |
647 | else | |
648 | scm_out_of_range (NULL, k); | |
649 | ||
3ee86942 | 650 | return SCM_MAKE_CHAR (scm_i_string_chars (str)[idx]); |
0f2d19dd | 651 | } |
1bbd0b84 | 652 | #undef FUNC_NAME |
0f2d19dd | 653 | |
3ee86942 MV |
654 | SCM |
655 | scm_c_string_ref (SCM str, size_t p) | |
656 | { | |
657 | if (p >= scm_i_string_length (str)) | |
658 | scm_out_of_range (NULL, scm_from_size_t (p)); | |
659 | return SCM_MAKE_CHAR (scm_i_string_chars (str)[p]); | |
660 | } | |
f0942910 | 661 | |
3b3b36dd | 662 | SCM_DEFINE (scm_string_set_x, "string-set!", 3, 0, 0, |
6fa73e72 | 663 | (SCM str, SCM k, SCM chr), |
0d26a824 MG |
664 | "Store @var{chr} in element @var{k} of @var{str} and return\n" |
665 | "an unspecified value. @var{k} must be a valid index of\n" | |
666 | "@var{str}.") | |
1bbd0b84 | 667 | #define FUNC_NAME s_scm_string_set_x |
0f2d19dd | 668 | { |
3ae3166b | 669 | size_t len; |
a55c2b68 MV |
670 | unsigned long idx; |
671 | ||
f0942910 | 672 | SCM_VALIDATE_STRING (1, str); |
3ae3166b LC |
673 | |
674 | len = scm_i_string_length (str); | |
675 | if (SCM_LIKELY (len > 0)) | |
676 | idx = scm_to_unsigned_integer (k, 0, len - 1); | |
677 | else | |
678 | scm_out_of_range (NULL, k); | |
679 | ||
34d19ef6 | 680 | SCM_VALIDATE_CHAR (3, chr); |
3ee86942 MV |
681 | { |
682 | char *dst = scm_i_string_writable_chars (str); | |
683 | dst[idx] = SCM_CHAR (chr); | |
684 | scm_i_string_stop_writing (); | |
685 | } | |
0f2d19dd JB |
686 | return SCM_UNSPECIFIED; |
687 | } | |
1bbd0b84 | 688 | #undef FUNC_NAME |
0f2d19dd | 689 | |
3ee86942 MV |
690 | void |
691 | scm_c_string_set_x (SCM str, size_t p, SCM chr) | |
692 | { | |
693 | if (p >= scm_i_string_length (str)) | |
694 | scm_out_of_range (NULL, scm_from_size_t (p)); | |
695 | { | |
696 | char *dst = scm_i_string_writable_chars (str); | |
697 | dst[p] = SCM_CHAR (chr); | |
698 | scm_i_string_stop_writing (); | |
699 | } | |
700 | } | |
0f2d19dd | 701 | |
3b3b36dd | 702 | SCM_DEFINE (scm_substring, "substring", 2, 1, 0, |
0d26a824 MG |
703 | (SCM str, SCM start, SCM end), |
704 | "Return a newly allocated string formed from the characters\n" | |
705 | "of @var{str} beginning with index @var{start} (inclusive) and\n" | |
706 | "ending with index @var{end} (exclusive).\n" | |
707 | "@var{str} must be a string, @var{start} and @var{end} must be\n" | |
708 | "exact integers satisfying:\n\n" | |
709 | "0 <= @var{start} <= @var{end} <= (string-length @var{str}).") | |
1bbd0b84 | 710 | #define FUNC_NAME s_scm_substring |
0f2d19dd | 711 | { |
3ee86942 | 712 | size_t len, from, to; |
685c0d71 | 713 | |
d1ca2c64 | 714 | SCM_VALIDATE_STRING (1, str); |
3ee86942 MV |
715 | len = scm_i_string_length (str); |
716 | from = scm_to_unsigned_integer (start, 0, len); | |
a55c2b68 | 717 | if (SCM_UNBNDP (end)) |
3ee86942 | 718 | to = len; |
a55c2b68 | 719 | else |
3ee86942 MV |
720 | to = scm_to_unsigned_integer (end, from, len); |
721 | return scm_i_substring (str, from, to); | |
0f2d19dd | 722 | } |
1bbd0b84 | 723 | #undef FUNC_NAME |
0f2d19dd | 724 | |
ed35de72 MV |
725 | SCM_DEFINE (scm_substring_read_only, "substring/read-only", 2, 1, 0, |
726 | (SCM str, SCM start, SCM end), | |
727 | "Return a newly allocated string formed from the characters\n" | |
728 | "of @var{str} beginning with index @var{start} (inclusive) and\n" | |
729 | "ending with index @var{end} (exclusive).\n" | |
730 | "@var{str} must be a string, @var{start} and @var{end} must be\n" | |
731 | "exact integers satisfying:\n" | |
732 | "\n" | |
733 | "0 <= @var{start} <= @var{end} <= (string-length @var{str}).\n" | |
734 | "\n" | |
735 | "The returned string is read-only.\n") | |
736 | #define FUNC_NAME s_scm_substring_read_only | |
737 | { | |
738 | size_t len, from, to; | |
739 | ||
740 | SCM_VALIDATE_STRING (1, str); | |
741 | len = scm_i_string_length (str); | |
742 | from = scm_to_unsigned_integer (start, 0, len); | |
743 | if (SCM_UNBNDP (end)) | |
744 | to = len; | |
745 | else | |
746 | to = scm_to_unsigned_integer (end, from, len); | |
747 | return scm_i_substring_read_only (str, from, to); | |
748 | } | |
749 | #undef FUNC_NAME | |
750 | ||
3ee86942 MV |
751 | SCM_DEFINE (scm_substring_copy, "substring/copy", 2, 1, 0, |
752 | (SCM str, SCM start, SCM end), | |
753 | "Return a newly allocated string formed from the characters\n" | |
754 | "of @var{str} beginning with index @var{start} (inclusive) and\n" | |
755 | "ending with index @var{end} (exclusive).\n" | |
756 | "@var{str} must be a string, @var{start} and @var{end} must be\n" | |
757 | "exact integers satisfying:\n\n" | |
758 | "0 <= @var{start} <= @var{end} <= (string-length @var{str}).") | |
759 | #define FUNC_NAME s_scm_substring_copy | |
760 | { | |
e1b29f6a MV |
761 | /* For the Scheme version, START is mandatory, but for the C |
762 | version, it is optional. See scm_string_copy in srfi-13.c for a | |
763 | rationale. | |
764 | */ | |
765 | ||
766 | size_t from, to; | |
3ee86942 MV |
767 | |
768 | SCM_VALIDATE_STRING (1, str); | |
e1b29f6a MV |
769 | scm_i_get_substring_spec (scm_i_string_length (str), |
770 | start, &from, end, &to); | |
3ee86942 MV |
771 | return scm_i_substring_copy (str, from, to); |
772 | } | |
773 | #undef FUNC_NAME | |
774 | ||
775 | SCM_DEFINE (scm_substring_shared, "substring/shared", 2, 1, 0, | |
776 | (SCM str, SCM start, SCM end), | |
777 | "Return string that indirectly refers to the characters\n" | |
778 | "of @var{str} beginning with index @var{start} (inclusive) and\n" | |
779 | "ending with index @var{end} (exclusive).\n" | |
780 | "@var{str} must be a string, @var{start} and @var{end} must be\n" | |
781 | "exact integers satisfying:\n\n" | |
782 | "0 <= @var{start} <= @var{end} <= (string-length @var{str}).") | |
783 | #define FUNC_NAME s_scm_substring_shared | |
784 | { | |
785 | size_t len, from, to; | |
786 | ||
787 | SCM_VALIDATE_STRING (1, str); | |
788 | len = scm_i_string_length (str); | |
789 | from = scm_to_unsigned_integer (start, 0, len); | |
790 | if (SCM_UNBNDP (end)) | |
791 | to = len; | |
792 | else | |
793 | to = scm_to_unsigned_integer (end, from, len); | |
794 | return scm_i_substring_shared (str, from, to); | |
795 | } | |
796 | #undef FUNC_NAME | |
685c0d71 | 797 | |
3b3b36dd | 798 | SCM_DEFINE (scm_string_append, "string-append", 0, 0, 1, |
6fa73e72 | 799 | (SCM args), |
0d26a824 MG |
800 | "Return a newly allocated string whose characters form the\n" |
801 | "concatenation of the given strings, @var{args}.") | |
1bbd0b84 | 802 | #define FUNC_NAME s_scm_string_append |
0f2d19dd JB |
803 | { |
804 | SCM res; | |
1be6b49c | 805 | size_t i = 0; |
c829a427 MV |
806 | SCM l, s; |
807 | char *data; | |
af45e3b0 DH |
808 | |
809 | SCM_VALIDATE_REST_ARGUMENT (args); | |
d2e53ed6 | 810 | for (l = args; !scm_is_null (l); l = SCM_CDR (l)) |
c829a427 MV |
811 | { |
812 | s = SCM_CAR (l); | |
813 | SCM_VALIDATE_STRING (SCM_ARGn, s); | |
3ee86942 | 814 | i += scm_i_string_length (s); |
c829a427 | 815 | } |
3ee86942 | 816 | res = scm_i_make_string (i, &data); |
d2e53ed6 | 817 | for (l = args; !scm_is_null (l); l = SCM_CDR (l)) |
c829a427 | 818 | { |
edea856c | 819 | size_t len; |
c829a427 | 820 | s = SCM_CAR (l); |
3ee86942 | 821 | SCM_VALIDATE_STRING (SCM_ARGn, s); |
edea856c | 822 | len = scm_i_string_length (s); |
3ee86942 MV |
823 | memcpy (data, scm_i_string_chars (s), len); |
824 | data += len; | |
c829a427 MV |
825 | scm_remember_upto_here_1 (s); |
826 | } | |
0f2d19dd JB |
827 | return res; |
828 | } | |
1bbd0b84 | 829 | #undef FUNC_NAME |
0f2d19dd | 830 | |
c829a427 MV |
831 | int |
832 | scm_is_string (SCM obj) | |
833 | { | |
3ee86942 | 834 | return IS_STRING (obj); |
c829a427 | 835 | } |
24933780 | 836 | |
c829a427 MV |
837 | SCM |
838 | scm_from_locale_stringn (const char *str, size_t len) | |
839 | { | |
840 | SCM res; | |
841 | char *dst; | |
4d4528e7 | 842 | |
c829a427 MV |
843 | if (len == (size_t)-1) |
844 | len = strlen (str); | |
3ee86942 | 845 | res = scm_i_make_string (len, &dst); |
c829a427 MV |
846 | memcpy (dst, str, len); |
847 | return res; | |
848 | } | |
4d4528e7 | 849 | |
c829a427 MV |
850 | SCM |
851 | scm_from_locale_string (const char *str) | |
4d4528e7 | 852 | { |
c829a427 MV |
853 | return scm_from_locale_stringn (str, -1); |
854 | } | |
4d4528e7 | 855 | |
c829a427 MV |
856 | SCM |
857 | scm_take_locale_stringn (char *str, size_t len) | |
858 | { | |
48ddf0d9 KR |
859 | SCM buf, res; |
860 | ||
c829a427 | 861 | if (len == (size_t)-1) |
48ddf0d9 | 862 | len = strlen (str); |
c829a427 MV |
863 | else |
864 | { | |
48ddf0d9 KR |
865 | /* Ensure STR is null terminated. A realloc for 1 extra byte should |
866 | often be satisfied from the alignment padding after the block, with | |
867 | no actual data movement. */ | |
868 | str = scm_realloc (str, len+1); | |
869 | str[len] = '\0'; | |
c829a427 | 870 | } |
c829a427 | 871 | |
fd0a5bbc | 872 | buf = scm_i_take_stringbufn (str, len); |
3ee86942 | 873 | res = scm_double_cell (STRING_TAG, |
48ddf0d9 KR |
874 | SCM_UNPACK (buf), |
875 | (scm_t_bits) 0, (scm_t_bits) len); | |
c829a427 MV |
876 | return res; |
877 | } | |
878 | ||
48ddf0d9 KR |
879 | SCM |
880 | scm_take_locale_string (char *str) | |
881 | { | |
882 | return scm_take_locale_stringn (str, -1); | |
883 | } | |
884 | ||
c829a427 MV |
885 | char * |
886 | scm_to_locale_stringn (SCM str, size_t *lenp) | |
887 | { | |
888 | char *res; | |
889 | size_t len; | |
4d4528e7 | 890 | |
3ee86942 | 891 | if (!scm_is_string (str)) |
c829a427 | 892 | scm_wrong_type_arg_msg (NULL, 0, str, "string"); |
3ee86942 | 893 | len = scm_i_string_length (str); |
c829a427 | 894 | res = scm_malloc (len + ((lenp==NULL)? 1 : 0)); |
3ee86942 | 895 | memcpy (res, scm_i_string_chars (str), len); |
c829a427 MV |
896 | if (lenp == NULL) |
897 | { | |
898 | res[len] = '\0'; | |
899 | if (strlen (res) != len) | |
900 | { | |
901 | free (res); | |
902 | scm_misc_error (NULL, | |
903 | "string contains #\\nul character: ~S", | |
904 | scm_list_1 (str)); | |
905 | } | |
906 | } | |
907 | else | |
4d4528e7 | 908 | *lenp = len; |
24933780 | 909 | |
c829a427 MV |
910 | scm_remember_upto_here_1 (str); |
911 | return res; | |
4d4528e7 | 912 | } |
af68e5e5 | 913 | |
c829a427 MV |
914 | char * |
915 | scm_to_locale_string (SCM str) | |
916 | { | |
917 | return scm_to_locale_stringn (str, NULL); | |
918 | } | |
af68e5e5 | 919 | |
c829a427 MV |
920 | size_t |
921 | scm_to_locale_stringbuf (SCM str, char *buf, size_t max_len) | |
922 | { | |
923 | size_t len; | |
924 | ||
3ee86942 | 925 | if (!scm_is_string (str)) |
c829a427 | 926 | scm_wrong_type_arg_msg (NULL, 0, str, "string"); |
3ee86942 MV |
927 | len = scm_i_string_length (str); |
928 | memcpy (buf, scm_i_string_chars (str), (len > max_len)? max_len : len); | |
c829a427 MV |
929 | scm_remember_upto_here_1 (str); |
930 | return len; | |
931 | } | |
af68e5e5 | 932 | |
3ee86942 MV |
933 | /* converts C scm_array of strings to SCM scm_list of strings. */ |
934 | /* If argc < 0, a null terminated scm_array is assumed. */ | |
935 | SCM | |
936 | scm_makfromstrs (int argc, char **argv) | |
937 | { | |
938 | int i = argc; | |
939 | SCM lst = SCM_EOL; | |
940 | if (0 > i) | |
941 | for (i = 0; argv[i]; i++); | |
942 | while (i--) | |
943 | lst = scm_cons (scm_from_locale_string (argv[i]), lst); | |
944 | return lst; | |
945 | } | |
946 | ||
c829a427 MV |
947 | /* Return a newly allocated array of char pointers to each of the strings |
948 | in args, with a terminating NULL pointer. */ | |
949 | ||
950 | char ** | |
951 | scm_i_allocate_string_pointers (SCM list) | |
af68e5e5 | 952 | { |
c829a427 MV |
953 | char **result; |
954 | int len = scm_ilength (list); | |
955 | int i; | |
956 | ||
957 | if (len < 0) | |
958 | scm_wrong_type_arg_msg (NULL, 0, list, "proper list"); | |
959 | ||
661ae7ab | 960 | scm_dynwind_begin (0); |
c829a427 MV |
961 | |
962 | result = (char **) scm_malloc ((len + 1) * sizeof (char *)); | |
963 | result[len] = NULL; | |
661ae7ab | 964 | scm_dynwind_unwind_handler (free, result, 0); |
c829a427 MV |
965 | |
966 | /* The list might be have been modified in another thread, so | |
967 | we check LIST before each access. | |
968 | */ | |
d2e53ed6 | 969 | for (i = 0; i < len && scm_is_pair (list); i++) |
c829a427 MV |
970 | { |
971 | result[i] = scm_to_locale_string (SCM_CAR (list)); | |
972 | list = SCM_CDR (list); | |
973 | } | |
974 | ||
661ae7ab | 975 | scm_dynwind_end (); |
c829a427 | 976 | return result; |
af68e5e5 | 977 | } |
e53cc817 | 978 | |
c829a427 MV |
979 | void |
980 | scm_i_free_string_pointers (char **pointers) | |
981 | { | |
982 | int i; | |
983 | ||
984 | for (i = 0; pointers[i]; i++) | |
985 | free (pointers[i]); | |
986 | free (pointers); | |
987 | } | |
24933780 | 988 | |
6f14f578 MV |
989 | void |
990 | scm_i_get_substring_spec (size_t len, | |
991 | SCM start, size_t *cstart, | |
992 | SCM end, size_t *cend) | |
993 | { | |
994 | if (SCM_UNBNDP (start)) | |
995 | *cstart = 0; | |
996 | else | |
997 | *cstart = scm_to_unsigned_integer (start, 0, len); | |
998 | ||
999 | if (SCM_UNBNDP (end)) | |
1000 | *cend = len; | |
1001 | else | |
1002 | *cend = scm_to_unsigned_integer (end, *cstart, len); | |
1003 | } | |
1004 | ||
3ee86942 MV |
1005 | #if SCM_ENABLE_DEPRECATED |
1006 | ||
556d75db MV |
1007 | /* When these definitions are removed, it becomes reasonable to use |
1008 | read-only strings for string literals. For that, change the reader | |
1009 | to create string literals with scm_c_substring_read_only instead of | |
1010 | with scm_c_substring_copy. | |
1011 | */ | |
1012 | ||
3ee86942 | 1013 | int |
fe78c51a | 1014 | scm_i_deprecated_stringp (SCM str) |
3ee86942 MV |
1015 | { |
1016 | scm_c_issue_deprecation_warning | |
1017 | ("SCM_STRINGP is deprecated. Use scm_is_string instead."); | |
1018 | ||
2616f0e0 | 1019 | return scm_is_string (str); |
3ee86942 MV |
1020 | } |
1021 | ||
1022 | char * | |
fe78c51a | 1023 | scm_i_deprecated_string_chars (SCM str) |
3ee86942 MV |
1024 | { |
1025 | char *chars; | |
1026 | ||
1027 | scm_c_issue_deprecation_warning | |
1028 | ("SCM_STRING_CHARS is deprecated. See the manual for alternatives."); | |
1029 | ||
2616f0e0 MV |
1030 | /* We don't accept shared substrings here since they are not |
1031 | null-terminated. | |
1032 | */ | |
1033 | if (IS_SH_STRING (str)) | |
1034 | scm_misc_error (NULL, | |
1035 | "SCM_STRING_CHARS does not work with shared substrings.", | |
1036 | SCM_EOL); | |
1037 | ||
556d75db MV |
1038 | /* We explicitely test for read-only strings to produce a better |
1039 | error message. | |
1040 | */ | |
1041 | ||
1042 | if (IS_RO_STRING (str)) | |
1043 | scm_misc_error (NULL, | |
1044 | "SCM_STRING_CHARS does not work with read-only strings.", | |
1045 | SCM_EOL); | |
1046 | ||
2616f0e0 | 1047 | /* The following is still wrong, of course... |
3ee86942 MV |
1048 | */ |
1049 | chars = scm_i_string_writable_chars (str); | |
1050 | scm_i_string_stop_writing (); | |
1051 | return chars; | |
1052 | } | |
1053 | ||
1054 | size_t | |
fe78c51a | 1055 | scm_i_deprecated_string_length (SCM str) |
3ee86942 MV |
1056 | { |
1057 | scm_c_issue_deprecation_warning | |
1058 | ("SCM_STRING_LENGTH is deprecated. Use scm_c_string_length instead."); | |
1059 | return scm_c_string_length (str); | |
1060 | } | |
1061 | ||
1062 | #endif | |
1063 | ||
0f2d19dd JB |
1064 | void |
1065 | scm_init_strings () | |
0f2d19dd | 1066 | { |
3ee86942 | 1067 | scm_nullstr = scm_i_make_string (0, NULL); |
7c33806a | 1068 | |
a0599745 | 1069 | #include "libguile/strings.x" |
0f2d19dd JB |
1070 | } |
1071 | ||
89e00824 ML |
1072 | |
1073 | /* | |
1074 | Local Variables: | |
1075 | c-file-style: "gnu" | |
1076 | End: | |
1077 | */ |