Commit | Line | Data |
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29bcdbb0 | 1 | /* Copyright (C) 1995,1996,1998,2000,2001, 2004, 2006, 2008, 2009, 2010 Free Software Foundation, Inc. |
0f2d19dd | 2 | * |
73be1d9e | 3 | * This library is free software; you can redistribute it and/or |
53befeb7 NJ |
4 | * modify it under the terms of the GNU Lesser General Public License |
5 | * as published by the Free Software Foundation; either version 3 of | |
6 | * the License, or (at your option) any later version. | |
0f2d19dd | 7 | * |
53befeb7 NJ |
8 | * This library is distributed in the hope that it will be useful, but |
9 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
73be1d9e MV |
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 | |
53befeb7 NJ |
15 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
16 | * 02110-1301 USA | |
73be1d9e | 17 | */ |
1bbd0b84 | 18 | |
1bbd0b84 | 19 | |
0f2d19dd | 20 | \f |
dbb605f5 LC |
21 | #ifdef HAVE_CONFIG_H |
22 | # include <config.h> | |
23 | #endif | |
0f2d19dd | 24 | |
faf2c9d7 | 25 | #include <string.h> |
3ee86942 | 26 | #include <stdio.h> |
9c44cd45 | 27 | #include <ctype.h> |
edb7bb47 | 28 | #include <uninorm.h> |
9c44cd45 | 29 | #include <unistr.h> |
eca29b02 | 30 | #include <uniconv.h> |
faf2c9d7 | 31 | |
889975e5 MG |
32 | #include "striconveh.h" |
33 | ||
a0599745 MD |
34 | #include "libguile/_scm.h" |
35 | #include "libguile/chars.h" | |
7c33806a | 36 | #include "libguile/root.h" |
a0599745 | 37 | #include "libguile/strings.h" |
a3d7d5d5 | 38 | #include "libguile/error.h" |
f45eccff | 39 | #include "libguile/generalized-vectors.h" |
1afff620 | 40 | #include "libguile/deprecation.h" |
a0599745 | 41 | #include "libguile/validate.h" |
1afff620 | 42 | |
0f2d19dd JB |
43 | \f |
44 | ||
45 | /* {Strings} | |
46 | */ | |
47 | ||
3ee86942 MV |
48 | |
49 | /* Stringbufs | |
50 | * | |
51 | * XXX - keeping an accurate refcount during GC seems to be quite | |
52 | * tricky, so we just keep score of whether a stringbuf might be | |
50b1996f | 53 | * shared, not whether it definitely is. |
3ee86942 MV |
54 | * |
55 | * The scheme I (mvo) tried to keep an accurate reference count would | |
56 | * recount all strings that point to a stringbuf during the mark-phase | |
57 | * of the GC. This was done since one cannot access the stringbuf of | |
58 | * a string when that string is freed (in order to decrease the | |
59 | * reference count). The memory of the stringbuf might have been | |
60 | * reused already for something completely different. | |
61 | * | |
62 | * This recounted worked for a small number of threads beating on | |
63 | * cow-strings, but it failed randomly with more than 10 threads, say. | |
64 | * I couldn't figure out what went wrong, so I used the conservative | |
65 | * approach implemented below. | |
50b1996f | 66 | * |
ba54a202 LC |
67 | * There are 2 storage strategies for stringbufs: 8-bit and wide. 8-bit |
68 | * strings are ISO-8859-1-encoded strings; wide strings are 32-bit (UCS-4) | |
69 | * strings. | |
3ee86942 MV |
70 | */ |
71 | ||
ba54a202 LC |
72 | /* The size in words of the stringbuf header (type tag + size). */ |
73 | #define STRINGBUF_HEADER_SIZE 2U | |
74 | ||
75 | #define STRINGBUF_HEADER_BYTES (STRINGBUF_HEADER_SIZE * sizeof (SCM)) | |
76 | ||
35920c00 | 77 | #define STRINGBUF_F_SHARED SCM_I_STRINGBUF_F_SHARED |
5f236208 | 78 | #define STRINGBUF_F_WIDE SCM_I_STRINGBUF_F_WIDE |
3ee86942 MV |
79 | |
80 | #define STRINGBUF_TAG scm_tc7_stringbuf | |
81 | #define STRINGBUF_SHARED(buf) (SCM_CELL_WORD_0(buf) & STRINGBUF_F_SHARED) | |
9c44cd45 | 82 | #define STRINGBUF_WIDE(buf) (SCM_CELL_WORD_0(buf) & STRINGBUF_F_WIDE) |
3ee86942 | 83 | |
ba54a202 LC |
84 | #define STRINGBUF_CHARS(buf) ((unsigned char *) \ |
85 | SCM_CELL_OBJECT_LOC (buf, \ | |
86 | STRINGBUF_HEADER_SIZE)) | |
87 | #define STRINGBUF_LENGTH(buf) (SCM_CELL_WORD_1 (buf)) | |
3ee86942 | 88 | |
ba54a202 | 89 | #define STRINGBUF_WIDE_CHARS(buf) ((scm_t_wchar *) STRINGBUF_CHARS (buf)) |
3ee86942 | 90 | |
9b41542f LC |
91 | #define SET_STRINGBUF_SHARED(buf) \ |
92 | do \ | |
93 | { \ | |
94 | /* Don't modify BUF if it's already marked as shared since it might be \ | |
95 | a read-only, statically allocated stringbuf. */ \ | |
96 | if (SCM_LIKELY (!STRINGBUF_SHARED (buf))) \ | |
97 | SCM_SET_CELL_WORD_0 ((buf), SCM_CELL_WORD_0 (buf) | STRINGBUF_F_SHARED); \ | |
98 | } \ | |
99 | while (0) | |
3ee86942 | 100 | |
56a3dcd4 | 101 | #ifdef SCM_STRING_LENGTH_HISTOGRAM |
3ee86942 MV |
102 | static size_t lenhist[1001]; |
103 | #endif | |
104 | ||
50b1996f MG |
105 | /* Make a stringbuf with space for LEN 8-bit Latin-1-encoded |
106 | characters. */ | |
3ee86942 MV |
107 | static SCM |
108 | make_stringbuf (size_t len) | |
0f2d19dd | 109 | { |
3ee86942 MV |
110 | /* XXX - for the benefit of SCM_STRING_CHARS, SCM_SYMBOL_CHARS and |
111 | scm_i_symbol_chars, all stringbufs are null-terminated. Once | |
112 | SCM_STRING_CHARS and SCM_SYMBOL_CHARS are removed and the code | |
113 | has been changed for scm_i_symbol_chars, this null-termination | |
114 | can be dropped. | |
115 | */ | |
116 | ||
ba54a202 LC |
117 | SCM buf; |
118 | ||
56a3dcd4 | 119 | #ifdef SCM_STRING_LENGTH_HISTOGRAM |
3ee86942 MV |
120 | if (len < 1000) |
121 | lenhist[len]++; | |
122 | else | |
123 | lenhist[1000]++; | |
124 | #endif | |
0f2d19dd | 125 | |
ba54a202 LC |
126 | buf = PTR2SCM (scm_gc_malloc_pointerless (STRINGBUF_HEADER_BYTES + len + 1, |
127 | "string")); | |
128 | ||
129 | SCM_SET_CELL_TYPE (buf, STRINGBUF_TAG); | |
130 | SCM_SET_CELL_WORD_1 (buf, (scm_t_bits) len); | |
131 | ||
132 | STRINGBUF_CHARS (buf)[len] = 0; | |
133 | ||
134 | return buf; | |
3ee86942 | 135 | } |
e53cc817 | 136 | |
50b1996f MG |
137 | /* Make a stringbuf with space for LEN 32-bit UCS-4-encoded |
138 | characters. */ | |
9c44cd45 MG |
139 | static SCM |
140 | make_wide_stringbuf (size_t len) | |
141 | { | |
ba54a202 LC |
142 | SCM buf; |
143 | size_t raw_len; | |
144 | ||
56a3dcd4 | 145 | #ifdef SCM_STRING_LENGTH_HISTOGRAM |
9c44cd45 MG |
146 | if (len < 1000) |
147 | lenhist[len]++; | |
148 | else | |
149 | lenhist[1000]++; | |
150 | #endif | |
151 | ||
ba54a202 LC |
152 | raw_len = (len + 1) * sizeof (scm_t_wchar); |
153 | buf = PTR2SCM (scm_gc_malloc_pointerless (STRINGBUF_HEADER_BYTES + raw_len, | |
154 | "string")); | |
155 | ||
156 | SCM_SET_CELL_TYPE (buf, STRINGBUF_TAG | STRINGBUF_F_WIDE); | |
157 | SCM_SET_CELL_WORD_1 (buf, (scm_t_bits) len); | |
158 | ||
159 | STRINGBUF_WIDE_CHARS (buf)[len] = 0; | |
160 | ||
161 | return buf; | |
9c44cd45 MG |
162 | } |
163 | ||
ba54a202 LC |
164 | /* Return a UCS-4-encoded stringbuf containing the (possibly Latin-1-encoded) |
165 | characters from BUF. */ | |
166 | static SCM | |
167 | wide_stringbuf (SCM buf) | |
9c44cd45 | 168 | { |
ba54a202 | 169 | SCM new_buf; |
9c44cd45 MG |
170 | |
171 | if (STRINGBUF_WIDE (buf)) | |
ba54a202 LC |
172 | new_buf = buf; |
173 | else | |
9c44cd45 | 174 | { |
ba54a202 LC |
175 | size_t i, len; |
176 | scm_t_wchar *mem; | |
9c44cd45 | 177 | |
ba54a202 | 178 | len = STRINGBUF_LENGTH (buf); |
9c44cd45 | 179 | |
ba54a202 | 180 | new_buf = make_wide_stringbuf (len); |
9c44cd45 | 181 | |
ba54a202 | 182 | mem = STRINGBUF_WIDE_CHARS (new_buf); |
9c44cd45 | 183 | for (i = 0; i < len; i++) |
ba54a202 | 184 | mem[i] = (scm_t_wchar) STRINGBUF_CHARS (buf)[i]; |
9c44cd45 | 185 | mem[len] = 0; |
9c44cd45 | 186 | } |
ba54a202 LC |
187 | |
188 | return new_buf; | |
3ee86942 | 189 | } |
bd9e24b3 | 190 | |
ba54a202 LC |
191 | /* Return a Latin-1-encoded stringbuf containing the (possibly UCS-4-encoded) |
192 | characters from BUF, if possible. */ | |
193 | static SCM | |
587a3355 MG |
194 | narrow_stringbuf (SCM buf) |
195 | { | |
ba54a202 | 196 | SCM new_buf; |
587a3355 MG |
197 | |
198 | if (!STRINGBUF_WIDE (buf)) | |
ba54a202 LC |
199 | new_buf = buf; |
200 | else | |
201 | { | |
202 | size_t i, len; | |
203 | scm_t_wchar *wmem; | |
204 | unsigned char *mem; | |
587a3355 | 205 | |
ba54a202 LC |
206 | len = STRINGBUF_LENGTH (buf); |
207 | wmem = STRINGBUF_WIDE_CHARS (buf); | |
587a3355 | 208 | |
ba54a202 LC |
209 | for (i = 0; i < len; i++) |
210 | if (wmem[i] > 0xFF) | |
211 | /* BUF cannot be narrowed. */ | |
212 | return buf; | |
587a3355 | 213 | |
ba54a202 | 214 | new_buf = make_stringbuf (len); |
587a3355 | 215 | |
ba54a202 LC |
216 | mem = STRINGBUF_CHARS (new_buf); |
217 | for (i = 0; i < len; i++) | |
218 | mem[i] = (unsigned char) wmem[i]; | |
219 | mem[len] = 0; | |
220 | } | |
221 | ||
222 | return new_buf; | |
587a3355 MG |
223 | } |
224 | ||
9de87eea | 225 | scm_i_pthread_mutex_t stringbuf_write_mutex = SCM_I_PTHREAD_MUTEX_INITIALIZER; |
bd9e24b3 | 226 | |
ba54a202 | 227 | \f |
3ee86942 MV |
228 | /* Copy-on-write strings. |
229 | */ | |
bd9e24b3 | 230 | |
3ee86942 | 231 | #define STRING_TAG scm_tc7_string |
bd9e24b3 | 232 | |
3ee86942 MV |
233 | #define STRING_STRINGBUF(str) (SCM_CELL_OBJECT_1(str)) |
234 | #define STRING_START(str) ((size_t)SCM_CELL_WORD_2(str)) | |
235 | #define STRING_LENGTH(str) ((size_t)SCM_CELL_WORD_3(str)) | |
bd9e24b3 | 236 | |
3ee86942 MV |
237 | #define SET_STRING_STRINGBUF(str,buf) (SCM_SET_CELL_OBJECT_1(str,buf)) |
238 | #define SET_STRING_START(str,start) (SCM_SET_CELL_WORD_2(str,start)) | |
239 | ||
240 | #define IS_STRING(str) (SCM_NIMP(str) && SCM_TYP7(str) == STRING_TAG) | |
241 | ||
ed35de72 MV |
242 | /* Read-only strings. |
243 | */ | |
244 | ||
35920c00 | 245 | #define RO_STRING_TAG scm_tc7_ro_string |
ed35de72 MV |
246 | #define IS_RO_STRING(str) (SCM_CELL_TYPE(str)==RO_STRING_TAG) |
247 | ||
e1b29f6a MV |
248 | /* Mutation-sharing substrings |
249 | */ | |
250 | ||
251 | #define SH_STRING_TAG (scm_tc7_string + 0x100) | |
252 | ||
253 | #define SH_STRING_STRING(sh) (SCM_CELL_OBJECT_1(sh)) | |
254 | /* START and LENGTH as for STRINGs. */ | |
255 | ||
256 | #define IS_SH_STRING(str) (SCM_CELL_TYPE(str)==SH_STRING_TAG) | |
257 | ||
e7efe8e7 AW |
258 | SCM scm_nullstr; |
259 | ||
50b1996f MG |
260 | /* Create a scheme string with space for LEN 8-bit Latin-1-encoded |
261 | characters. CHARSP, if not NULL, will be set to location of the | |
262 | char array. */ | |
3ee86942 MV |
263 | SCM |
264 | scm_i_make_string (size_t len, char **charsp) | |
265 | { | |
266 | SCM buf = make_stringbuf (len); | |
267 | SCM res; | |
268 | if (charsp) | |
f59cf998 | 269 | *charsp = (char *) STRINGBUF_CHARS (buf); |
3ee86942 MV |
270 | res = scm_double_cell (STRING_TAG, SCM_UNPACK(buf), |
271 | (scm_t_bits)0, (scm_t_bits) len); | |
272 | return res; | |
0f2d19dd JB |
273 | } |
274 | ||
50b1996f MG |
275 | /* Create a scheme string with space for LEN 32-bit UCS-4-encoded |
276 | characters. CHARSP, if not NULL, will be set to location of the | |
277 | character array. */ | |
9c44cd45 | 278 | SCM |
50b1996f | 279 | scm_i_make_wide_string (size_t len, scm_t_wchar **charsp) |
9c44cd45 MG |
280 | { |
281 | SCM buf = make_wide_stringbuf (len); | |
282 | SCM res; | |
283 | if (charsp) | |
284 | *charsp = STRINGBUF_WIDE_CHARS (buf); | |
285 | res = scm_double_cell (STRING_TAG, SCM_UNPACK (buf), | |
286 | (scm_t_bits) 0, (scm_t_bits) len); | |
287 | return res; | |
288 | } | |
289 | ||
3ee86942 MV |
290 | static void |
291 | validate_substring_args (SCM str, size_t start, size_t end) | |
292 | { | |
293 | if (!IS_STRING (str)) | |
294 | scm_wrong_type_arg_msg (NULL, 0, str, "string"); | |
295 | if (start > STRING_LENGTH (str)) | |
296 | scm_out_of_range (NULL, scm_from_size_t (start)); | |
297 | if (end > STRING_LENGTH (str) || end < start) | |
298 | scm_out_of_range (NULL, scm_from_size_t (end)); | |
299 | } | |
0f2d19dd | 300 | |
e1b29f6a MV |
301 | static inline void |
302 | get_str_buf_start (SCM *str, SCM *buf, size_t *start) | |
303 | { | |
304 | *start = STRING_START (*str); | |
305 | if (IS_SH_STRING (*str)) | |
306 | { | |
307 | *str = SH_STRING_STRING (*str); | |
308 | *start += STRING_START (*str); | |
309 | } | |
310 | *buf = STRING_STRINGBUF (*str); | |
311 | } | |
312 | ||
3ee86942 MV |
313 | SCM |
314 | scm_i_substring (SCM str, size_t start, size_t end) | |
0f2d19dd | 315 | { |
e1b29f6a MV |
316 | SCM buf; |
317 | size_t str_start; | |
318 | get_str_buf_start (&str, &buf, &str_start); | |
9de87eea | 319 | scm_i_pthread_mutex_lock (&stringbuf_write_mutex); |
3ee86942 | 320 | SET_STRINGBUF_SHARED (buf); |
9de87eea | 321 | scm_i_pthread_mutex_unlock (&stringbuf_write_mutex); |
3ee86942 | 322 | return scm_double_cell (STRING_TAG, SCM_UNPACK(buf), |
e1b29f6a MV |
323 | (scm_t_bits)str_start + start, |
324 | (scm_t_bits) end - start); | |
0f2d19dd JB |
325 | } |
326 | ||
ed35de72 MV |
327 | SCM |
328 | scm_i_substring_read_only (SCM str, size_t start, size_t end) | |
329 | { | |
45a9f430 LC |
330 | SCM buf; |
331 | size_t str_start; | |
332 | get_str_buf_start (&str, &buf, &str_start); | |
333 | scm_i_pthread_mutex_lock (&stringbuf_write_mutex); | |
334 | SET_STRINGBUF_SHARED (buf); | |
335 | scm_i_pthread_mutex_unlock (&stringbuf_write_mutex); | |
336 | return scm_double_cell (RO_STRING_TAG, SCM_UNPACK(buf), | |
337 | (scm_t_bits)str_start + start, | |
338 | (scm_t_bits) end - start); | |
ed35de72 MV |
339 | } |
340 | ||
3ee86942 MV |
341 | SCM |
342 | scm_i_substring_copy (SCM str, size_t start, size_t end) | |
343 | { | |
344 | size_t len = end - start; | |
edea856c | 345 | SCM buf, my_buf; |
e1b29f6a MV |
346 | size_t str_start; |
347 | get_str_buf_start (&str, &buf, &str_start); | |
9c44cd45 MG |
348 | if (scm_i_is_narrow_string (str)) |
349 | { | |
350 | my_buf = make_stringbuf (len); | |
351 | memcpy (STRINGBUF_CHARS (my_buf), | |
352 | STRINGBUF_CHARS (buf) + str_start + start, len); | |
353 | } | |
354 | else | |
355 | { | |
356 | my_buf = make_wide_stringbuf (len); | |
357 | u32_cpy ((scm_t_uint32 *) STRINGBUF_WIDE_CHARS (my_buf), | |
358 | (scm_t_uint32 *) (STRINGBUF_WIDE_CHARS (buf) + str_start | |
359 | + start), len); | |
360 | /* Even though this string is wide, the substring may be narrow. | |
50b1996f | 361 | Consider adding code to narrow the string. */ |
9c44cd45 | 362 | } |
3ee86942 | 363 | scm_remember_upto_here_1 (buf); |
9c44cd45 MG |
364 | return scm_double_cell (STRING_TAG, SCM_UNPACK (my_buf), |
365 | (scm_t_bits) 0, (scm_t_bits) len); | |
3ee86942 | 366 | } |
0f2d19dd | 367 | |
e1b29f6a MV |
368 | SCM |
369 | scm_i_substring_shared (SCM str, size_t start, size_t end) | |
370 | { | |
371 | if (start == 0 && end == STRING_LENGTH (str)) | |
372 | return str; | |
373 | else | |
374 | { | |
375 | size_t len = end - start; | |
376 | if (IS_SH_STRING (str)) | |
377 | { | |
378 | start += STRING_START (str); | |
379 | str = SH_STRING_STRING (str); | |
380 | } | |
381 | return scm_double_cell (SH_STRING_TAG, SCM_UNPACK(str), | |
382 | (scm_t_bits)start, (scm_t_bits) len); | |
383 | } | |
384 | } | |
385 | ||
3ee86942 MV |
386 | SCM |
387 | scm_c_substring (SCM str, size_t start, size_t end) | |
388 | { | |
389 | validate_substring_args (str, start, end); | |
390 | return scm_i_substring (str, start, end); | |
391 | } | |
ee149d03 | 392 | |
ed35de72 MV |
393 | SCM |
394 | scm_c_substring_read_only (SCM str, size_t start, size_t end) | |
395 | { | |
396 | validate_substring_args (str, start, end); | |
397 | return scm_i_substring_read_only (str, start, end); | |
398 | } | |
399 | ||
0f2d19dd | 400 | SCM |
3ee86942 | 401 | scm_c_substring_copy (SCM str, size_t start, size_t end) |
0f2d19dd | 402 | { |
3ee86942 MV |
403 | validate_substring_args (str, start, end); |
404 | return scm_i_substring_copy (str, start, end); | |
405 | } | |
406 | ||
3ee86942 MV |
407 | SCM |
408 | scm_c_substring_shared (SCM str, size_t start, size_t end) | |
409 | { | |
410 | validate_substring_args (str, start, end); | |
411 | return scm_i_substring_shared (str, start, end); | |
412 | } | |
0f2d19dd | 413 | |
d6c74168 | 414 | \f |
3ee86942 MV |
415 | /* Internal accessors |
416 | */ | |
417 | ||
50b1996f MG |
418 | /* Returns the number of characters in STR. This may be different |
419 | than the memory size of the string storage. */ | |
3ee86942 MV |
420 | size_t |
421 | scm_i_string_length (SCM str) | |
0f2d19dd | 422 | { |
3ee86942 | 423 | return STRING_LENGTH (str); |
0f2d19dd JB |
424 | } |
425 | ||
50b1996f MG |
426 | /* True if the string is 'narrow', meaning it has a 8-bit Latin-1 |
427 | encoding. False if it is 'wide', having a 32-bit UCS-4 | |
428 | encoding. */ | |
9c44cd45 MG |
429 | int |
430 | scm_i_is_narrow_string (SCM str) | |
431 | { | |
432 | return !STRINGBUF_WIDE (STRING_STRINGBUF (str)); | |
433 | } | |
434 | ||
587a3355 MG |
435 | /* Try to coerce a string to be narrow. It if is narrow already, do |
436 | nothing. If it is wide, shrink it to narrow if none of its | |
437 | characters are above 0xFF. Return true if the string is narrow or | |
438 | was made to be narrow. */ | |
439 | int | |
440 | scm_i_try_narrow_string (SCM str) | |
441 | { | |
ba54a202 | 442 | SET_STRING_STRINGBUF (str, narrow_stringbuf (STRING_STRINGBUF (str))); |
587a3355 MG |
443 | |
444 | return scm_i_is_narrow_string (str); | |
445 | } | |
446 | ||
50b1996f MG |
447 | /* Returns a pointer to the 8-bit Latin-1 encoded character array of |
448 | STR. */ | |
3ee86942 MV |
449 | const char * |
450 | scm_i_string_chars (SCM str) | |
451 | { | |
452 | SCM buf; | |
e1b29f6a MV |
453 | size_t start; |
454 | get_str_buf_start (&str, &buf, &start); | |
9c44cd45 | 455 | if (scm_i_is_narrow_string (str)) |
f59cf998 | 456 | return (const char *) STRINGBUF_CHARS (buf) + start; |
9c44cd45 MG |
457 | else |
458 | scm_misc_error (NULL, "Invalid read access of chars of wide string: ~s", | |
459 | scm_list_1 (str)); | |
460 | return NULL; | |
3ee86942 | 461 | } |
b00418df | 462 | |
50b1996f MG |
463 | /* Returns a pointer to the 32-bit UCS-4 encoded character array of |
464 | STR. */ | |
9c44cd45 MG |
465 | const scm_t_wchar * |
466 | scm_i_string_wide_chars (SCM str) | |
467 | { | |
468 | SCM buf; | |
469 | size_t start; | |
470 | ||
471 | get_str_buf_start (&str, &buf, &start); | |
472 | if (!scm_i_is_narrow_string (str)) | |
f59cf998 | 473 | return (const scm_t_wchar *) STRINGBUF_WIDE_CHARS (buf) + start; |
9c44cd45 MG |
474 | else |
475 | scm_misc_error (NULL, "Invalid read access of chars of narrow string: ~s", | |
476 | scm_list_1 (str)); | |
477 | } | |
478 | ||
479 | /* If the buffer in ORIG_STR is shared, copy ORIG_STR's characters to | |
480 | a new string buffer, so that it can be modified without modifying | |
50b1996f MG |
481 | other strings. Also, lock the string mutex. Later, one must call |
482 | scm_i_string_stop_writing to unlock the mutex. */ | |
9c44cd45 MG |
483 | SCM |
484 | scm_i_string_start_writing (SCM orig_str) | |
b00418df | 485 | { |
ed35de72 | 486 | SCM buf, str = orig_str; |
e1b29f6a | 487 | size_t start; |
ed35de72 | 488 | |
e1b29f6a | 489 | get_str_buf_start (&str, &buf, &start); |
ed35de72 MV |
490 | if (IS_RO_STRING (str)) |
491 | scm_misc_error (NULL, "string is read-only: ~s", scm_list_1 (orig_str)); | |
492 | ||
9de87eea | 493 | scm_i_pthread_mutex_lock (&stringbuf_write_mutex); |
3ee86942 MV |
494 | if (STRINGBUF_SHARED (buf)) |
495 | { | |
9c44cd45 | 496 | /* Clone the stringbuf. */ |
3ee86942 MV |
497 | size_t len = STRING_LENGTH (str); |
498 | SCM new_buf; | |
499 | ||
9de87eea | 500 | scm_i_pthread_mutex_unlock (&stringbuf_write_mutex); |
3ee86942 | 501 | |
9c44cd45 MG |
502 | if (scm_i_is_narrow_string (str)) |
503 | { | |
504 | new_buf = make_stringbuf (len); | |
505 | memcpy (STRINGBUF_CHARS (new_buf), | |
506 | STRINGBUF_CHARS (buf) + STRING_START (str), len); | |
507 | ||
508 | } | |
509 | else | |
510 | { | |
511 | new_buf = make_wide_stringbuf (len); | |
512 | u32_cpy ((scm_t_uint32 *) STRINGBUF_WIDE_CHARS (new_buf), | |
513 | (scm_t_uint32 *) (STRINGBUF_WIDE_CHARS (buf) | |
514 | + STRING_START (str)), len); | |
515 | } | |
3ee86942 | 516 | |
3ee86942 MV |
517 | SET_STRING_STRINGBUF (str, new_buf); |
518 | start -= STRING_START (str); | |
902578f1 LC |
519 | |
520 | /* FIXME: The following operations are not atomic, so other threads | |
521 | looking at STR may see an inconsistent state. Nevertheless it can't | |
522 | hurt much since (i) accessing STR while it is being mutated can't | |
523 | yield a crash, and (ii) concurrent accesses to STR should be | |
524 | protected by a mutex at the application level. The latter may not | |
525 | apply when STR != ORIG_STR, though. */ | |
3ee86942 | 526 | SET_STRING_START (str, 0); |
902578f1 | 527 | SET_STRING_STRINGBUF (str, new_buf); |
3ee86942 MV |
528 | |
529 | buf = new_buf; | |
530 | ||
9de87eea | 531 | scm_i_pthread_mutex_lock (&stringbuf_write_mutex); |
3ee86942 | 532 | } |
9c44cd45 MG |
533 | return orig_str; |
534 | } | |
3ee86942 | 535 | |
50b1996f | 536 | /* Return a pointer to the 8-bit Latin-1 chars of a string. */ |
9c44cd45 MG |
537 | char * |
538 | scm_i_string_writable_chars (SCM str) | |
539 | { | |
540 | SCM buf; | |
541 | size_t start; | |
3ee86942 | 542 | |
9c44cd45 MG |
543 | get_str_buf_start (&str, &buf, &start); |
544 | if (scm_i_is_narrow_string (str)) | |
f59cf998 | 545 | return (char *) STRINGBUF_CHARS (buf) + start; |
9c44cd45 MG |
546 | else |
547 | scm_misc_error (NULL, "Invalid write access of chars of wide string: ~s", | |
548 | scm_list_1 (str)); | |
549 | return NULL; | |
b00418df DH |
550 | } |
551 | ||
50b1996f | 552 | /* Return a pointer to the UCS-4 codepoints of a string. */ |
9c44cd45 MG |
553 | static scm_t_wchar * |
554 | scm_i_string_writable_wide_chars (SCM str) | |
555 | { | |
556 | SCM buf; | |
557 | size_t start; | |
558 | ||
559 | get_str_buf_start (&str, &buf, &start); | |
560 | if (!scm_i_is_narrow_string (str)) | |
561 | return STRINGBUF_WIDE_CHARS (buf) + start; | |
562 | else | |
1c7b216f | 563 | scm_misc_error (NULL, "Invalid write access of chars of narrow string: ~s", |
9c44cd45 | 564 | scm_list_1 (str)); |
b00418df DH |
565 | } |
566 | ||
50b1996f MG |
567 | /* Unlock the string mutex that was locked when |
568 | scm_i_string_start_writing was called. */ | |
3ee86942 MV |
569 | void |
570 | scm_i_string_stop_writing (void) | |
571 | { | |
9de87eea | 572 | scm_i_pthread_mutex_unlock (&stringbuf_write_mutex); |
3ee86942 | 573 | } |
b00418df | 574 | |
50b1996f | 575 | /* Return the Xth character of STR as a UCS-4 codepoint. */ |
9c44cd45 MG |
576 | scm_t_wchar |
577 | scm_i_string_ref (SCM str, size_t x) | |
578 | { | |
579 | if (scm_i_is_narrow_string (str)) | |
580 | return (scm_t_wchar) (unsigned char) (scm_i_string_chars (str)[x]); | |
581 | else | |
582 | return scm_i_string_wide_chars (str)[x]; | |
583 | } | |
584 | ||
889975e5 MG |
585 | /* Returns index+1 of the first char in STR that matches C, or |
586 | 0 if the char is not found. */ | |
587 | int | |
588 | scm_i_string_contains_char (SCM str, char ch) | |
589 | { | |
590 | size_t i; | |
591 | size_t len = scm_i_string_length (str); | |
592 | ||
593 | i = 0; | |
594 | if (scm_i_is_narrow_string (str)) | |
595 | { | |
596 | while (i < len) | |
597 | { | |
598 | if (scm_i_string_chars (str)[i] == ch) | |
599 | return i+1; | |
600 | i++; | |
601 | } | |
602 | } | |
603 | else | |
604 | { | |
605 | while (i < len) | |
606 | { | |
607 | if (scm_i_string_wide_chars (str)[i] | |
608 | == (unsigned char) ch) | |
609 | return i+1; | |
610 | i++; | |
611 | } | |
612 | } | |
613 | return 0; | |
614 | } | |
615 | ||
3f47e526 MG |
616 | int |
617 | scm_i_string_strcmp (SCM sstr, size_t start_x, const char *cstr) | |
618 | { | |
619 | if (scm_i_is_narrow_string (sstr)) | |
620 | { | |
621 | const char *a = scm_i_string_chars (sstr) + start_x; | |
622 | const char *b = cstr; | |
623 | return strncmp (a, b, strlen(b)); | |
624 | } | |
625 | else | |
626 | { | |
627 | size_t i; | |
628 | const scm_t_wchar *a = scm_i_string_wide_chars (sstr) + start_x; | |
629 | const char *b = cstr; | |
630 | for (i = 0; i < strlen (b); i++) | |
631 | { | |
632 | if (a[i] != (unsigned char) b[i]) | |
633 | return 1; | |
634 | } | |
635 | } | |
636 | return 0; | |
637 | } | |
638 | ||
50b1996f | 639 | /* Set the Pth character of STR to UCS-4 codepoint CHR. */ |
9c44cd45 MG |
640 | void |
641 | scm_i_string_set_x (SCM str, size_t p, scm_t_wchar chr) | |
642 | { | |
643 | if (chr > 0xFF && scm_i_is_narrow_string (str)) | |
ba54a202 | 644 | SET_STRING_STRINGBUF (str, wide_stringbuf (STRING_STRINGBUF (str))); |
9c44cd45 MG |
645 | |
646 | if (scm_i_is_narrow_string (str)) | |
647 | { | |
648 | char *dst = scm_i_string_writable_chars (str); | |
587a3355 | 649 | dst[p] = chr; |
9c44cd45 MG |
650 | } |
651 | else | |
652 | { | |
653 | scm_t_wchar *dst = scm_i_string_writable_wide_chars (str); | |
654 | dst[p] = chr; | |
655 | } | |
656 | } | |
657 | ||
ba54a202 | 658 | \f |
3ee86942 | 659 | /* Symbols. |
587a3355 | 660 | |
3ee86942 MV |
661 | Basic symbol creation and accessing is done here, the rest is in |
662 | symbols.[hc]. This has been done to keep stringbufs and the | |
663 | internals of strings and string-like objects confined to this file. | |
664 | */ | |
665 | ||
666 | #define SYMBOL_STRINGBUF SCM_CELL_OBJECT_1 | |
667 | ||
668 | SCM | |
6869328b MV |
669 | scm_i_make_symbol (SCM name, scm_t_bits flags, |
670 | unsigned long hash, SCM props) | |
3ee86942 MV |
671 | { |
672 | SCM buf; | |
673 | size_t start = STRING_START (name); | |
674 | size_t length = STRING_LENGTH (name); | |
675 | ||
676 | if (IS_SH_STRING (name)) | |
677 | { | |
678 | name = SH_STRING_STRING (name); | |
679 | start += STRING_START (name); | |
680 | } | |
681 | buf = SYMBOL_STRINGBUF (name); | |
682 | ||
683 | if (start == 0 && length == STRINGBUF_LENGTH (buf)) | |
684 | { | |
685 | /* reuse buf. */ | |
9de87eea | 686 | scm_i_pthread_mutex_lock (&stringbuf_write_mutex); |
3ee86942 | 687 | SET_STRINGBUF_SHARED (buf); |
9de87eea | 688 | scm_i_pthread_mutex_unlock (&stringbuf_write_mutex); |
3ee86942 MV |
689 | } |
690 | else | |
691 | { | |
692 | /* make new buf. */ | |
9c44cd45 MG |
693 | if (scm_i_is_narrow_string (name)) |
694 | { | |
695 | SCM new_buf = make_stringbuf (length); | |
696 | memcpy (STRINGBUF_CHARS (new_buf), | |
697 | STRINGBUF_CHARS (buf) + start, length); | |
698 | buf = new_buf; | |
699 | } | |
700 | else | |
701 | { | |
702 | SCM new_buf = make_wide_stringbuf (length); | |
703 | u32_cpy ((scm_t_uint32 *) STRINGBUF_WIDE_CHARS (new_buf), | |
704 | (scm_t_uint32 *) STRINGBUF_WIDE_CHARS (buf) + start, | |
705 | length); | |
706 | buf = new_buf; | |
707 | } | |
3ee86942 | 708 | } |
6869328b | 709 | return scm_double_cell (scm_tc7_symbol | flags, SCM_UNPACK (buf), |
3ee86942 MV |
710 | (scm_t_bits) hash, SCM_UNPACK (props)); |
711 | } | |
712 | ||
fd0a5bbc HWN |
713 | SCM |
714 | scm_i_c_make_symbol (const char *name, size_t len, | |
715 | scm_t_bits flags, unsigned long hash, SCM props) | |
716 | { | |
717 | SCM buf = make_stringbuf (len); | |
718 | memcpy (STRINGBUF_CHARS (buf), name, len); | |
719 | ||
a284cc7e LC |
720 | return scm_immutable_double_cell (scm_tc7_symbol | flags, SCM_UNPACK (buf), |
721 | (scm_t_bits) hash, SCM_UNPACK (props)); | |
fd0a5bbc HWN |
722 | } |
723 | ||
50b1996f MG |
724 | /* Returns the number of characters in SYM. This may be different |
725 | from the memory size of SYM. */ | |
3ee86942 MV |
726 | size_t |
727 | scm_i_symbol_length (SCM sym) | |
0f2d19dd | 728 | { |
3ee86942 | 729 | return STRINGBUF_LENGTH (SYMBOL_STRINGBUF (sym)); |
0f2d19dd JB |
730 | } |
731 | ||
071bb6a8 LC |
732 | size_t |
733 | scm_c_symbol_length (SCM sym) | |
734 | #define FUNC_NAME "scm_c_symbol_length" | |
735 | { | |
736 | SCM_VALIDATE_SYMBOL (1, sym); | |
737 | ||
738 | return STRINGBUF_LENGTH (SYMBOL_STRINGBUF (sym)); | |
739 | } | |
740 | #undef FUNC_NAME | |
741 | ||
50b1996f MG |
742 | /* True if the name of SYM is stored as a Latin-1 encoded string. |
743 | False if it is stored as a 32-bit UCS-4-encoded string. */ | |
9c44cd45 MG |
744 | int |
745 | scm_i_is_narrow_symbol (SCM sym) | |
746 | { | |
747 | SCM buf; | |
748 | ||
749 | buf = SYMBOL_STRINGBUF (sym); | |
750 | return !STRINGBUF_WIDE (buf); | |
751 | } | |
752 | ||
50b1996f MG |
753 | /* Returns a pointer to the 8-bit Latin-1 encoded character array that |
754 | contains the name of SYM. */ | |
3ee86942 MV |
755 | const char * |
756 | scm_i_symbol_chars (SCM sym) | |
757 | { | |
9c44cd45 MG |
758 | SCM buf; |
759 | ||
760 | buf = SYMBOL_STRINGBUF (sym); | |
761 | if (!STRINGBUF_WIDE (buf)) | |
f59cf998 | 762 | return (const char *) STRINGBUF_CHARS (buf); |
9c44cd45 MG |
763 | else |
764 | scm_misc_error (NULL, "Invalid access of chars of a wide symbol ~S", | |
765 | scm_list_1 (sym)); | |
766 | } | |
767 | ||
50b1996f MG |
768 | /* Return a pointer to the 32-bit UCS-4-encoded character array of a |
769 | symbol's name. */ | |
9c44cd45 MG |
770 | const scm_t_wchar * |
771 | scm_i_symbol_wide_chars (SCM sym) | |
772 | { | |
773 | SCM buf; | |
774 | ||
775 | buf = SYMBOL_STRINGBUF (sym); | |
776 | if (STRINGBUF_WIDE (buf)) | |
f59cf998 | 777 | return (const scm_t_wchar *) STRINGBUF_WIDE_CHARS (buf); |
9c44cd45 MG |
778 | else |
779 | scm_misc_error (NULL, "Invalid access of chars of a narrow symbol ~S", | |
780 | scm_list_1 (sym)); | |
3ee86942 | 781 | } |
1cc91f1b | 782 | |
be54b15d | 783 | SCM |
3ee86942 | 784 | scm_i_symbol_substring (SCM sym, size_t start, size_t end) |
be54b15d | 785 | { |
3ee86942 | 786 | SCM buf = SYMBOL_STRINGBUF (sym); |
9de87eea | 787 | scm_i_pthread_mutex_lock (&stringbuf_write_mutex); |
3ee86942 | 788 | SET_STRINGBUF_SHARED (buf); |
9de87eea | 789 | scm_i_pthread_mutex_unlock (&stringbuf_write_mutex); |
fd2b17b9 | 790 | return scm_double_cell (RO_STRING_TAG, SCM_UNPACK (buf), |
3ee86942 MV |
791 | (scm_t_bits)start, (scm_t_bits) end - start); |
792 | } | |
be54b15d | 793 | |
50b1996f | 794 | /* Returns the Xth character of symbol SYM as a UCS-4 codepoint. */ |
9c44cd45 MG |
795 | scm_t_wchar |
796 | scm_i_symbol_ref (SCM sym, size_t x) | |
797 | { | |
798 | if (scm_i_is_narrow_symbol (sym)) | |
799 | return (scm_t_wchar) (unsigned char) (scm_i_symbol_chars (sym)[x]); | |
800 | else | |
801 | return scm_i_symbol_wide_chars (sym)[x]; | |
802 | } | |
803 | ||
3ee86942 MV |
804 | /* Debugging |
805 | */ | |
be54b15d | 806 | |
6ce6923b MG |
807 | SCM_DEFINE (scm_sys_string_dump, "%string-dump", 1, 0, 0, (SCM str), |
808 | "Returns an association list containing debugging information\n" | |
809 | "for @var{str}. The association list has the following entries." | |
810 | "@table @code\n" | |
811 | "@item string\n" | |
812 | "The string itself.\n" | |
813 | "@item start\n" | |
814 | "The start index of the string into its stringbuf\n" | |
815 | "@item length\n" | |
816 | "The length of the string\n" | |
817 | "@item shared\n" | |
818 | "If this string is a substring, it returns its parent string.\n" | |
819 | "Otherwise, it returns @code{#f}\n" | |
88ed5759 MG |
820 | "@item read-only\n" |
821 | "@code{#t} if the string is read-only\n" | |
6ce6923b MG |
822 | "@item stringbuf-chars\n" |
823 | "A new string containing this string's stringbuf's characters\n" | |
824 | "@item stringbuf-length\n" | |
825 | "The number of characters in this stringbuf\n" | |
826 | "@item stringbuf-shared\n" | |
827 | "@code{#t} if this stringbuf is shared\n" | |
6ce6923b MG |
828 | "@item stringbuf-wide\n" |
829 | "@code{#t} if this stringbuf's characters are stored in a\n" | |
830 | "32-bit buffer, or @code{#f} if they are stored in an 8-bit\n" | |
831 | "buffer\n" | |
832 | "@end table") | |
3ee86942 MV |
833 | #define FUNC_NAME s_scm_sys_string_dump |
834 | { | |
ba54a202 | 835 | SCM e1, e2, e3, e4, e5, e6, e7, e8, e9; |
6ce6923b | 836 | SCM buf; |
3ee86942 | 837 | SCM_VALIDATE_STRING (1, str); |
6ce6923b MG |
838 | |
839 | /* String info */ | |
840 | e1 = scm_cons (scm_from_locale_symbol ("string"), | |
841 | str); | |
842 | e2 = scm_cons (scm_from_locale_symbol ("start"), | |
843 | scm_from_size_t (STRING_START (str))); | |
844 | e3 = scm_cons (scm_from_locale_symbol ("length"), | |
845 | scm_from_size_t (STRING_LENGTH (str))); | |
846 | ||
3ee86942 MV |
847 | if (IS_SH_STRING (str)) |
848 | { | |
6ce6923b MG |
849 | e4 = scm_cons (scm_from_locale_symbol ("shared"), |
850 | SH_STRING_STRING (str)); | |
851 | buf = STRING_STRINGBUF (SH_STRING_STRING (str)); | |
3ee86942 MV |
852 | } |
853 | else | |
854 | { | |
6ce6923b MG |
855 | e4 = scm_cons (scm_from_locale_symbol ("shared"), |
856 | SCM_BOOL_F); | |
857 | buf = STRING_STRINGBUF (str); | |
3ee86942 | 858 | } |
9c44cd45 | 859 | |
88ed5759 MG |
860 | if (IS_RO_STRING (str)) |
861 | e5 = scm_cons (scm_from_locale_symbol ("read-only"), | |
862 | SCM_BOOL_T); | |
863 | else | |
864 | e5 = scm_cons (scm_from_locale_symbol ("read-only"), | |
865 | SCM_BOOL_F); | |
587a3355 | 866 | |
6ce6923b | 867 | /* Stringbuf info */ |
6ce6923b MG |
868 | if (!STRINGBUF_WIDE (buf)) |
869 | { | |
870 | size_t len = STRINGBUF_LENGTH (buf); | |
871 | char *cbuf; | |
872 | SCM sbc = scm_i_make_string (len, &cbuf); | |
873 | memcpy (cbuf, STRINGBUF_CHARS (buf), len); | |
874 | e6 = scm_cons (scm_from_locale_symbol ("stringbuf-chars"), | |
875 | sbc); | |
3ee86942 | 876 | } |
6ce6923b MG |
877 | else |
878 | { | |
879 | size_t len = STRINGBUF_LENGTH (buf); | |
880 | scm_t_wchar *cbuf; | |
881 | SCM sbc = scm_i_make_wide_string (len, &cbuf); | |
882 | u32_cpy ((scm_t_uint32 *) cbuf, | |
883 | (scm_t_uint32 *) STRINGBUF_WIDE_CHARS (buf), len); | |
884 | e6 = scm_cons (scm_from_locale_symbol ("stringbuf-chars"), | |
885 | sbc); | |
886 | } | |
887 | e7 = scm_cons (scm_from_locale_symbol ("stringbuf-length"), | |
888 | scm_from_size_t (STRINGBUF_LENGTH (buf))); | |
889 | if (STRINGBUF_SHARED (buf)) | |
890 | e8 = scm_cons (scm_from_locale_symbol ("stringbuf-shared"), | |
891 | SCM_BOOL_T); | |
892 | else | |
893 | e8 = scm_cons (scm_from_locale_symbol ("stringbuf-shared"), | |
894 | SCM_BOOL_F); | |
6ce6923b | 895 | if (STRINGBUF_WIDE (buf)) |
ba54a202 LC |
896 | e9 = scm_cons (scm_from_locale_symbol ("stringbuf-wide"), |
897 | SCM_BOOL_T); | |
6ce6923b | 898 | else |
ba54a202 LC |
899 | e9 = scm_cons (scm_from_locale_symbol ("stringbuf-wide"), |
900 | SCM_BOOL_F); | |
6ce6923b | 901 | |
ba54a202 | 902 | return scm_list_n (e1, e2, e3, e4, e5, e6, e7, e8, e9, SCM_UNDEFINED); |
3ee86942 MV |
903 | } |
904 | #undef FUNC_NAME | |
905 | ||
6ce6923b MG |
906 | SCM_DEFINE (scm_sys_symbol_dump, "%symbol-dump", 1, 0, 0, (SCM sym), |
907 | "Returns an association list containing debugging information\n" | |
908 | "for @var{sym}. The association list has the following entries." | |
909 | "@table @code\n" | |
910 | "@item symbol\n" | |
911 | "The symbol itself\n" | |
912 | "@item hash\n" | |
913 | "Its hash value\n" | |
88ed5759 MG |
914 | "@item interned\n" |
915 | "@code{#t} if it is an interned symbol\n" | |
6ce6923b MG |
916 | "@item stringbuf-chars\n" |
917 | "A new string containing this symbols's stringbuf's characters\n" | |
918 | "@item stringbuf-length\n" | |
919 | "The number of characters in this stringbuf\n" | |
920 | "@item stringbuf-shared\n" | |
921 | "@code{#t} if this stringbuf is shared\n" | |
6ce6923b MG |
922 | "@item stringbuf-wide\n" |
923 | "@code{#t} if this stringbuf's characters are stored in a\n" | |
924 | "32-bit buffer, or @code{#f} if they are stored in an 8-bit\n" | |
925 | "buffer\n" | |
926 | "@end table") | |
3ee86942 MV |
927 | #define FUNC_NAME s_scm_sys_symbol_dump |
928 | { | |
ba54a202 | 929 | SCM e1, e2, e3, e4, e5, e6, e7; |
6ce6923b | 930 | SCM buf; |
3ee86942 | 931 | SCM_VALIDATE_SYMBOL (1, sym); |
6ce6923b MG |
932 | e1 = scm_cons (scm_from_locale_symbol ("symbol"), |
933 | sym); | |
934 | e2 = scm_cons (scm_from_locale_symbol ("hash"), | |
935 | scm_from_ulong (scm_i_symbol_hash (sym))); | |
88ed5759 MG |
936 | e3 = scm_cons (scm_from_locale_symbol ("interned"), |
937 | scm_symbol_interned_p (sym)); | |
6ce6923b MG |
938 | buf = SYMBOL_STRINGBUF (sym); |
939 | ||
940 | /* Stringbuf info */ | |
6ce6923b MG |
941 | if (!STRINGBUF_WIDE (buf)) |
942 | { | |
943 | size_t len = STRINGBUF_LENGTH (buf); | |
944 | char *cbuf; | |
945 | SCM sbc = scm_i_make_string (len, &cbuf); | |
946 | memcpy (cbuf, STRINGBUF_CHARS (buf), len); | |
947 | e4 = scm_cons (scm_from_locale_symbol ("stringbuf-chars"), | |
948 | sbc); | |
949 | } | |
9c44cd45 | 950 | else |
6ce6923b MG |
951 | { |
952 | size_t len = STRINGBUF_LENGTH (buf); | |
953 | scm_t_wchar *cbuf; | |
954 | SCM sbc = scm_i_make_wide_string (len, &cbuf); | |
955 | u32_cpy ((scm_t_uint32 *) cbuf, | |
956 | (scm_t_uint32 *) STRINGBUF_WIDE_CHARS (buf), len); | |
957 | e4 = scm_cons (scm_from_locale_symbol ("stringbuf-chars"), | |
958 | sbc); | |
959 | } | |
960 | e5 = scm_cons (scm_from_locale_symbol ("stringbuf-length"), | |
961 | scm_from_size_t (STRINGBUF_LENGTH (buf))); | |
962 | if (STRINGBUF_SHARED (buf)) | |
963 | e6 = scm_cons (scm_from_locale_symbol ("stringbuf-shared"), | |
964 | SCM_BOOL_T); | |
965 | else | |
966 | e6 = scm_cons (scm_from_locale_symbol ("stringbuf-shared"), | |
967 | SCM_BOOL_F); | |
6ce6923b | 968 | if (STRINGBUF_WIDE (buf)) |
ba54a202 | 969 | e7 = scm_cons (scm_from_locale_symbol ("stringbuf-wide"), |
6ce6923b MG |
970 | SCM_BOOL_T); |
971 | else | |
ba54a202 | 972 | e7 = scm_cons (scm_from_locale_symbol ("stringbuf-wide"), |
6ce6923b | 973 | SCM_BOOL_F); |
ba54a202 | 974 | return scm_list_n (e1, e2, e3, e4, e5, e6, e7, SCM_UNDEFINED); |
6ce6923b | 975 | |
3ee86942 MV |
976 | } |
977 | #undef FUNC_NAME | |
978 | ||
56a3dcd4 | 979 | #ifdef SCM_STRING_LENGTH_HISTOGRAM |
6ce6923b | 980 | |
9c44cd45 | 981 | SCM_DEFINE (scm_sys_stringbuf_hist, "%stringbuf-hist", 0, 0, 0, (void), "") |
e1b29f6a | 982 | #define FUNC_NAME s_scm_sys_stringbuf_hist |
3ee86942 MV |
983 | { |
984 | int i; | |
985 | for (i = 0; i < 1000; i++) | |
986 | if (lenhist[i]) | |
987 | fprintf (stderr, " %3d: %u\n", i, lenhist[i]); | |
988 | fprintf (stderr, ">999: %u\n", lenhist[1000]); | |
989 | return SCM_UNSPECIFIED; | |
be54b15d DH |
990 | } |
991 | #undef FUNC_NAME | |
992 | ||
3ee86942 MV |
993 | #endif |
994 | ||
995 | \f | |
996 | ||
997 | SCM_DEFINE (scm_string_p, "string?", 1, 0, 0, | |
998 | (SCM obj), | |
999 | "Return @code{#t} if @var{obj} is a string, else @code{#f}.") | |
1000 | #define FUNC_NAME s_scm_string_p | |
1001 | { | |
1002 | return scm_from_bool (IS_STRING (obj)); | |
1003 | } | |
1004 | #undef FUNC_NAME | |
1005 | ||
1006 | ||
1007 | SCM_REGISTER_PROC (s_scm_list_to_string, "list->string", 1, 0, 0, scm_string); | |
1008 | ||
1009 | SCM_DEFINE (scm_string, "string", 0, 0, 1, | |
1010 | (SCM chrs), | |
1011 | "@deffnx {Scheme Procedure} list->string chrs\n" | |
1012 | "Return a newly allocated string composed of the arguments,\n" | |
1013 | "@var{chrs}.") | |
1014 | #define FUNC_NAME s_scm_string | |
1015 | { | |
9aa27c1a | 1016 | SCM result = SCM_BOOL_F; |
9c44cd45 | 1017 | SCM rest; |
3ee86942 | 1018 | size_t len; |
9c44cd45 MG |
1019 | size_t p = 0; |
1020 | long i; | |
9aa27c1a | 1021 | int wide = 0; |
3ee86942 | 1022 | |
9c44cd45 MG |
1023 | /* Verify that this is a list of chars. */ |
1024 | i = scm_ilength (chrs); | |
3c7cf7f5 | 1025 | SCM_ASSERT (i >= 0, chrs, SCM_ARG1, FUNC_NAME); |
3ee86942 | 1026 | |
9c44cd45 MG |
1027 | len = (size_t) i; |
1028 | rest = chrs; | |
3ee86942 | 1029 | |
9c44cd45 | 1030 | while (len > 0 && scm_is_pair (rest)) |
3ee86942 | 1031 | { |
9c44cd45 | 1032 | SCM elt = SCM_CAR (rest); |
3ee86942 | 1033 | SCM_VALIDATE_CHAR (SCM_ARGn, elt); |
9aa27c1a MG |
1034 | if (SCM_CHAR (elt) > 0xFF) |
1035 | wide = 1; | |
9c44cd45 MG |
1036 | rest = SCM_CDR (rest); |
1037 | len--; | |
1038 | scm_remember_upto_here_1 (elt); | |
1039 | } | |
1040 | ||
1041 | /* Construct a string containing this list of chars. */ | |
1042 | len = (size_t) i; | |
1043 | rest = chrs; | |
1044 | ||
9aa27c1a | 1045 | if (wide == 0) |
9c44cd45 | 1046 | { |
56a3dcd4 LC |
1047 | char *buf; |
1048 | ||
9aa27c1a MG |
1049 | result = scm_i_make_string (len, NULL); |
1050 | result = scm_i_string_start_writing (result); | |
56a3dcd4 | 1051 | buf = scm_i_string_writable_chars (result); |
9aa27c1a MG |
1052 | while (len > 0 && scm_is_pair (rest)) |
1053 | { | |
1054 | SCM elt = SCM_CAR (rest); | |
1055 | buf[p] = (unsigned char) SCM_CHAR (elt); | |
1056 | p++; | |
1057 | rest = SCM_CDR (rest); | |
1058 | len--; | |
1059 | scm_remember_upto_here_1 (elt); | |
1060 | } | |
1061 | } | |
1062 | else | |
1063 | { | |
56a3dcd4 LC |
1064 | scm_t_wchar *buf; |
1065 | ||
9aa27c1a MG |
1066 | result = scm_i_make_wide_string (len, NULL); |
1067 | result = scm_i_string_start_writing (result); | |
56a3dcd4 | 1068 | buf = scm_i_string_writable_wide_chars (result); |
9aa27c1a MG |
1069 | while (len > 0 && scm_is_pair (rest)) |
1070 | { | |
1071 | SCM elt = SCM_CAR (rest); | |
1072 | buf[p] = SCM_CHAR (elt); | |
1073 | p++; | |
1074 | rest = SCM_CDR (rest); | |
1075 | len--; | |
1076 | scm_remember_upto_here_1 (elt); | |
1077 | } | |
3ee86942 | 1078 | } |
9c44cd45 MG |
1079 | scm_i_string_stop_writing (); |
1080 | ||
3ee86942 MV |
1081 | if (len > 0) |
1082 | scm_misc_error (NULL, "list changed while constructing string", SCM_EOL); | |
9c44cd45 | 1083 | if (!scm_is_null (rest)) |
3ee86942 MV |
1084 | scm_wrong_type_arg_msg (NULL, 0, chrs, "proper list"); |
1085 | ||
1086 | return result; | |
1087 | } | |
1088 | #undef FUNC_NAME | |
be54b15d | 1089 | |
3b3b36dd | 1090 | SCM_DEFINE (scm_make_string, "make-string", 1, 1, 0, |
6fa73e72 | 1091 | (SCM k, SCM chr), |
0d26a824 MG |
1092 | "Return a newly allocated string of\n" |
1093 | "length @var{k}. If @var{chr} is given, then all elements of\n" | |
1094 | "the string are initialized to @var{chr}, otherwise the contents\n" | |
9401323e | 1095 | "of the @var{string} are unspecified.") |
1bbd0b84 | 1096 | #define FUNC_NAME s_scm_make_string |
0f2d19dd | 1097 | { |
3ee86942 MV |
1098 | return scm_c_make_string (scm_to_size_t (k), chr); |
1099 | } | |
1100 | #undef FUNC_NAME | |
1101 | ||
1102 | SCM | |
1103 | scm_c_make_string (size_t len, SCM chr) | |
1104 | #define FUNC_NAME NULL | |
1105 | { | |
9c44cd45 MG |
1106 | size_t p; |
1107 | SCM res = scm_i_make_string (len, NULL); | |
cb0d8be2 | 1108 | |
e11e83f3 MV |
1109 | if (!SCM_UNBNDP (chr)) |
1110 | { | |
3ee86942 | 1111 | SCM_VALIDATE_CHAR (0, chr); |
9c44cd45 MG |
1112 | res = scm_i_string_start_writing (res); |
1113 | for (p = 0; p < len; p++) | |
1114 | scm_i_string_set_x (res, p, SCM_CHAR (chr)); | |
1115 | scm_i_string_stop_writing (); | |
0f2d19dd | 1116 | } |
e11e83f3 MV |
1117 | |
1118 | return res; | |
0f2d19dd | 1119 | } |
1bbd0b84 | 1120 | #undef FUNC_NAME |
0f2d19dd | 1121 | |
3b3b36dd | 1122 | SCM_DEFINE (scm_string_length, "string-length", 1, 0, 0, |
0d26a824 MG |
1123 | (SCM string), |
1124 | "Return the number of characters in @var{string}.") | |
1bbd0b84 | 1125 | #define FUNC_NAME s_scm_string_length |
0f2d19dd | 1126 | { |
d1ca2c64 | 1127 | SCM_VALIDATE_STRING (1, string); |
3ee86942 | 1128 | return scm_from_size_t (STRING_LENGTH (string)); |
0f2d19dd | 1129 | } |
1bbd0b84 | 1130 | #undef FUNC_NAME |
0f2d19dd | 1131 | |
f8ba2bb9 | 1132 | SCM_DEFINE (scm_string_bytes_per_char, "string-bytes-per-char", 1, 0, 0, |
9c44cd45 MG |
1133 | (SCM string), |
1134 | "Return the bytes used to represent a character in @var{string}." | |
1135 | "This will return 1 or 4.") | |
f8ba2bb9 | 1136 | #define FUNC_NAME s_scm_string_bytes_per_char |
9c44cd45 MG |
1137 | { |
1138 | SCM_VALIDATE_STRING (1, string); | |
1139 | if (!scm_i_is_narrow_string (string)) | |
1140 | return scm_from_int (4); | |
1141 | ||
1142 | return scm_from_int (1); | |
1143 | } | |
1144 | #undef FUNC_NAME | |
1145 | ||
3ee86942 MV |
1146 | size_t |
1147 | scm_c_string_length (SCM string) | |
1148 | { | |
1149 | if (!IS_STRING (string)) | |
1150 | scm_wrong_type_arg_msg (NULL, 0, string, "string"); | |
1151 | return STRING_LENGTH (string); | |
1152 | } | |
1153 | ||
bd9e24b3 | 1154 | SCM_DEFINE (scm_string_ref, "string-ref", 2, 0, 0, |
6fa73e72 | 1155 | (SCM str, SCM k), |
9c44cd45 MG |
1156 | "Return character @var{k} of @var{str} using zero-origin\n" |
1157 | "indexing. @var{k} must be a valid index of @var{str}.") | |
1bbd0b84 | 1158 | #define FUNC_NAME s_scm_string_ref |
0f2d19dd | 1159 | { |
3ae3166b | 1160 | size_t len; |
a55c2b68 | 1161 | unsigned long idx; |
bd9e24b3 | 1162 | |
d1ca2c64 | 1163 | SCM_VALIDATE_STRING (1, str); |
3ae3166b LC |
1164 | |
1165 | len = scm_i_string_length (str); | |
1166 | if (SCM_LIKELY (len > 0)) | |
1167 | idx = scm_to_unsigned_integer (k, 0, len - 1); | |
1168 | else | |
1169 | scm_out_of_range (NULL, k); | |
1170 | ||
9c44cd45 MG |
1171 | if (scm_i_is_narrow_string (str)) |
1172 | return SCM_MAKE_CHAR (scm_i_string_chars (str)[idx]); | |
1173 | else | |
1174 | return SCM_MAKE_CHAR (scm_i_string_wide_chars (str)[idx]); | |
0f2d19dd | 1175 | } |
1bbd0b84 | 1176 | #undef FUNC_NAME |
0f2d19dd | 1177 | |
3ee86942 MV |
1178 | SCM |
1179 | scm_c_string_ref (SCM str, size_t p) | |
1180 | { | |
1181 | if (p >= scm_i_string_length (str)) | |
1182 | scm_out_of_range (NULL, scm_from_size_t (p)); | |
9c44cd45 MG |
1183 | if (scm_i_is_narrow_string (str)) |
1184 | return SCM_MAKE_CHAR (scm_i_string_chars (str)[p]); | |
1185 | else | |
1186 | return SCM_MAKE_CHAR (scm_i_string_wide_chars (str)[p]); | |
1187 | ||
3ee86942 | 1188 | } |
f0942910 | 1189 | |
3b3b36dd | 1190 | SCM_DEFINE (scm_string_set_x, "string-set!", 3, 0, 0, |
6fa73e72 | 1191 | (SCM str, SCM k, SCM chr), |
9c44cd45 MG |
1192 | "Store @var{chr} in element @var{k} of @var{str} and return\n" |
1193 | "an unspecified value. @var{k} must be a valid index of\n" | |
1194 | "@var{str}.") | |
1bbd0b84 | 1195 | #define FUNC_NAME s_scm_string_set_x |
0f2d19dd | 1196 | { |
3ae3166b | 1197 | size_t len; |
a55c2b68 MV |
1198 | unsigned long idx; |
1199 | ||
f0942910 | 1200 | SCM_VALIDATE_STRING (1, str); |
3ae3166b LC |
1201 | |
1202 | len = scm_i_string_length (str); | |
1203 | if (SCM_LIKELY (len > 0)) | |
1204 | idx = scm_to_unsigned_integer (k, 0, len - 1); | |
1205 | else | |
1206 | scm_out_of_range (NULL, k); | |
1207 | ||
34d19ef6 | 1208 | SCM_VALIDATE_CHAR (3, chr); |
9c44cd45 MG |
1209 | str = scm_i_string_start_writing (str); |
1210 | scm_i_string_set_x (str, idx, SCM_CHAR (chr)); | |
1211 | scm_i_string_stop_writing (); | |
1212 | ||
0f2d19dd JB |
1213 | return SCM_UNSPECIFIED; |
1214 | } | |
1bbd0b84 | 1215 | #undef FUNC_NAME |
0f2d19dd | 1216 | |
3ee86942 MV |
1217 | void |
1218 | scm_c_string_set_x (SCM str, size_t p, SCM chr) | |
1219 | { | |
1220 | if (p >= scm_i_string_length (str)) | |
1221 | scm_out_of_range (NULL, scm_from_size_t (p)); | |
9c44cd45 MG |
1222 | str = scm_i_string_start_writing (str); |
1223 | scm_i_string_set_x (str, p, SCM_CHAR (chr)); | |
1224 | scm_i_string_stop_writing (); | |
3ee86942 | 1225 | } |
0f2d19dd | 1226 | |
3b3b36dd | 1227 | SCM_DEFINE (scm_substring, "substring", 2, 1, 0, |
0d26a824 MG |
1228 | (SCM str, SCM start, SCM end), |
1229 | "Return a newly allocated string formed from the characters\n" | |
1230 | "of @var{str} beginning with index @var{start} (inclusive) and\n" | |
1231 | "ending with index @var{end} (exclusive).\n" | |
1232 | "@var{str} must be a string, @var{start} and @var{end} must be\n" | |
1233 | "exact integers satisfying:\n\n" | |
1234 | "0 <= @var{start} <= @var{end} <= (string-length @var{str}).") | |
1bbd0b84 | 1235 | #define FUNC_NAME s_scm_substring |
0f2d19dd | 1236 | { |
3ee86942 | 1237 | size_t len, from, to; |
685c0d71 | 1238 | |
d1ca2c64 | 1239 | SCM_VALIDATE_STRING (1, str); |
3ee86942 MV |
1240 | len = scm_i_string_length (str); |
1241 | from = scm_to_unsigned_integer (start, 0, len); | |
a55c2b68 | 1242 | if (SCM_UNBNDP (end)) |
3ee86942 | 1243 | to = len; |
a55c2b68 | 1244 | else |
3ee86942 MV |
1245 | to = scm_to_unsigned_integer (end, from, len); |
1246 | return scm_i_substring (str, from, to); | |
0f2d19dd | 1247 | } |
1bbd0b84 | 1248 | #undef FUNC_NAME |
0f2d19dd | 1249 | |
ed35de72 MV |
1250 | SCM_DEFINE (scm_substring_read_only, "substring/read-only", 2, 1, 0, |
1251 | (SCM str, SCM start, SCM end), | |
1252 | "Return a newly allocated string formed from the characters\n" | |
1253 | "of @var{str} beginning with index @var{start} (inclusive) and\n" | |
1254 | "ending with index @var{end} (exclusive).\n" | |
1255 | "@var{str} must be a string, @var{start} and @var{end} must be\n" | |
1256 | "exact integers satisfying:\n" | |
1257 | "\n" | |
1258 | "0 <= @var{start} <= @var{end} <= (string-length @var{str}).\n" | |
1259 | "\n" | |
1260 | "The returned string is read-only.\n") | |
1261 | #define FUNC_NAME s_scm_substring_read_only | |
1262 | { | |
1263 | size_t len, from, to; | |
1264 | ||
1265 | SCM_VALIDATE_STRING (1, str); | |
1266 | len = scm_i_string_length (str); | |
1267 | from = scm_to_unsigned_integer (start, 0, len); | |
1268 | if (SCM_UNBNDP (end)) | |
1269 | to = len; | |
1270 | else | |
1271 | to = scm_to_unsigned_integer (end, from, len); | |
1272 | return scm_i_substring_read_only (str, from, to); | |
1273 | } | |
1274 | #undef FUNC_NAME | |
1275 | ||
3ee86942 MV |
1276 | SCM_DEFINE (scm_substring_copy, "substring/copy", 2, 1, 0, |
1277 | (SCM str, SCM start, SCM end), | |
1278 | "Return a newly allocated string formed from the characters\n" | |
1279 | "of @var{str} beginning with index @var{start} (inclusive) and\n" | |
1280 | "ending with index @var{end} (exclusive).\n" | |
1281 | "@var{str} must be a string, @var{start} and @var{end} must be\n" | |
1282 | "exact integers satisfying:\n\n" | |
1283 | "0 <= @var{start} <= @var{end} <= (string-length @var{str}).") | |
1284 | #define FUNC_NAME s_scm_substring_copy | |
1285 | { | |
e1b29f6a MV |
1286 | /* For the Scheme version, START is mandatory, but for the C |
1287 | version, it is optional. See scm_string_copy in srfi-13.c for a | |
1288 | rationale. | |
1289 | */ | |
1290 | ||
1291 | size_t from, to; | |
3ee86942 MV |
1292 | |
1293 | SCM_VALIDATE_STRING (1, str); | |
e1b29f6a MV |
1294 | scm_i_get_substring_spec (scm_i_string_length (str), |
1295 | start, &from, end, &to); | |
3ee86942 MV |
1296 | return scm_i_substring_copy (str, from, to); |
1297 | } | |
1298 | #undef FUNC_NAME | |
1299 | ||
1300 | SCM_DEFINE (scm_substring_shared, "substring/shared", 2, 1, 0, | |
1301 | (SCM str, SCM start, SCM end), | |
1302 | "Return string that indirectly refers to the characters\n" | |
1303 | "of @var{str} beginning with index @var{start} (inclusive) and\n" | |
1304 | "ending with index @var{end} (exclusive).\n" | |
1305 | "@var{str} must be a string, @var{start} and @var{end} must be\n" | |
1306 | "exact integers satisfying:\n\n" | |
1307 | "0 <= @var{start} <= @var{end} <= (string-length @var{str}).") | |
1308 | #define FUNC_NAME s_scm_substring_shared | |
1309 | { | |
1310 | size_t len, from, to; | |
1311 | ||
1312 | SCM_VALIDATE_STRING (1, str); | |
1313 | len = scm_i_string_length (str); | |
1314 | from = scm_to_unsigned_integer (start, 0, len); | |
1315 | if (SCM_UNBNDP (end)) | |
1316 | to = len; | |
1317 | else | |
1318 | to = scm_to_unsigned_integer (end, from, len); | |
1319 | return scm_i_substring_shared (str, from, to); | |
1320 | } | |
1321 | #undef FUNC_NAME | |
685c0d71 | 1322 | |
3b3b36dd | 1323 | SCM_DEFINE (scm_string_append, "string-append", 0, 0, 1, |
6fa73e72 | 1324 | (SCM args), |
9c44cd45 | 1325 | "Return a newly allocated string whose characters form the\n" |
0d26a824 | 1326 | "concatenation of the given strings, @var{args}.") |
1bbd0b84 | 1327 | #define FUNC_NAME s_scm_string_append |
0f2d19dd JB |
1328 | { |
1329 | SCM res; | |
9c44cd45 MG |
1330 | size_t len = 0; |
1331 | int wide = 0; | |
c829a427 | 1332 | SCM l, s; |
bd4911ef | 1333 | size_t i; |
9909c395 MG |
1334 | union |
1335 | { | |
1336 | char *narrow; | |
1337 | scm_t_wchar *wide; | |
1338 | } data; | |
af45e3b0 DH |
1339 | |
1340 | SCM_VALIDATE_REST_ARGUMENT (args); | |
9c44cd45 | 1341 | for (l = args; !scm_is_null (l); l = SCM_CDR (l)) |
c829a427 MV |
1342 | { |
1343 | s = SCM_CAR (l); | |
1344 | SCM_VALIDATE_STRING (SCM_ARGn, s); | |
9c44cd45 MG |
1345 | len += scm_i_string_length (s); |
1346 | if (!scm_i_is_narrow_string (s)) | |
1347 | wide = 1; | |
c829a427 | 1348 | } |
9909c395 | 1349 | data.narrow = NULL; |
9c44cd45 | 1350 | if (!wide) |
9909c395 | 1351 | res = scm_i_make_string (len, &data.narrow); |
9c44cd45 | 1352 | else |
9909c395 | 1353 | res = scm_i_make_wide_string (len, &data.wide); |
9c44cd45 MG |
1354 | |
1355 | for (l = args; !scm_is_null (l); l = SCM_CDR (l)) | |
c829a427 | 1356 | { |
edea856c | 1357 | size_t len; |
c829a427 | 1358 | s = SCM_CAR (l); |
3ee86942 | 1359 | SCM_VALIDATE_STRING (SCM_ARGn, s); |
edea856c | 1360 | len = scm_i_string_length (s); |
9c44cd45 MG |
1361 | if (!wide) |
1362 | { | |
9909c395 MG |
1363 | memcpy (data.narrow, scm_i_string_chars (s), len); |
1364 | data.narrow += len; | |
9c44cd45 MG |
1365 | } |
1366 | else | |
1367 | { | |
1368 | if (scm_i_is_narrow_string (s)) | |
1369 | { | |
1370 | for (i = 0; i < scm_i_string_length (s); i++) | |
9909c395 | 1371 | data.wide[i] = (unsigned char) scm_i_string_chars (s)[i]; |
9c44cd45 MG |
1372 | } |
1373 | else | |
9909c395 | 1374 | u32_cpy ((scm_t_uint32 *) data.wide, |
9c44cd45 | 1375 | (scm_t_uint32 *) scm_i_string_wide_chars (s), len); |
9909c395 | 1376 | data.wide += len; |
9c44cd45 | 1377 | } |
c829a427 MV |
1378 | scm_remember_upto_here_1 (s); |
1379 | } | |
0f2d19dd JB |
1380 | return res; |
1381 | } | |
1bbd0b84 | 1382 | #undef FUNC_NAME |
0f2d19dd | 1383 | |
c829a427 MV |
1384 | int |
1385 | scm_is_string (SCM obj) | |
1386 | { | |
3ee86942 | 1387 | return IS_STRING (obj); |
c829a427 | 1388 | } |
24933780 | 1389 | |
a3d7d5d5 LC |
1390 | \f |
1391 | /* Conversion to/from other encodings. */ | |
1392 | ||
1393 | SCM_SYMBOL (scm_encoding_error_key, "encoding-error"); | |
1394 | static void | |
1395 | scm_encoding_error (const char *subr, const char *message, SCM args) | |
1396 | { | |
1397 | scm_error (scm_encoding_error_key, subr, message, args, SCM_BOOL_F); | |
1398 | } | |
1399 | ||
fac32b51 | 1400 | SCM |
587a3355 MG |
1401 | scm_from_stringn (const char *str, size_t len, const char *encoding, |
1402 | scm_t_string_failed_conversion_handler handler) | |
1403 | { | |
1404 | size_t u32len, i; | |
1405 | scm_t_wchar *u32; | |
1406 | int wide = 0; | |
1407 | SCM res; | |
1408 | ||
fac32b51 MG |
1409 | if (len == 0) |
1410 | return scm_nullstr; | |
1411 | ||
889975e5 MG |
1412 | if (encoding == NULL) |
1413 | { | |
1414 | /* If encoding is null, use Latin-1. */ | |
1415 | char *buf; | |
1416 | res = scm_i_make_string (len, &buf); | |
1417 | memcpy (buf, str, len); | |
1418 | return res; | |
1419 | } | |
1420 | ||
587a3355 MG |
1421 | u32len = 0; |
1422 | u32 = (scm_t_wchar *) u32_conv_from_encoding (encoding, | |
1423 | (enum iconv_ilseq_handler) | |
1424 | handler, | |
1425 | str, len, | |
1426 | NULL, | |
1427 | NULL, &u32len); | |
1428 | ||
1429 | if (u32 == NULL) | |
1430 | { | |
1431 | if (errno == ENOMEM) | |
1432 | scm_memory_error ("locale string conversion"); | |
1433 | else | |
1434 | { | |
889975e5 | 1435 | /* There are invalid sequences in the input string. */ |
587a3355 MG |
1436 | SCM errstr; |
1437 | char *dst; | |
587a3355 MG |
1438 | errstr = scm_i_make_string (len, &dst); |
1439 | memcpy (dst, str, len); | |
a3d7d5d5 LC |
1440 | scm_encoding_error (NULL, |
1441 | "input locale conversion error from ~s: ~s", | |
1442 | scm_list_2 (scm_from_locale_string (encoding), | |
1443 | errstr)); | |
587a3355 MG |
1444 | scm_remember_upto_here_1 (errstr); |
1445 | } | |
1446 | } | |
1447 | ||
1448 | i = 0; | |
1449 | while (i < u32len) | |
1450 | if (u32[i++] > 0xFF) | |
1451 | { | |
1452 | wide = 1; | |
1453 | break; | |
1454 | } | |
1455 | ||
1456 | if (!wide) | |
1457 | { | |
1458 | char *dst; | |
1459 | res = scm_i_make_string (u32len, &dst); | |
1460 | for (i = 0; i < u32len; i ++) | |
1461 | dst[i] = (unsigned char) u32[i]; | |
1462 | dst[u32len] = '\0'; | |
1463 | } | |
1464 | else | |
1465 | { | |
1466 | scm_t_wchar *wdst; | |
1467 | res = scm_i_make_wide_string (u32len, &wdst); | |
1468 | u32_cpy ((scm_t_uint32 *) wdst, (scm_t_uint32 *) u32, u32len); | |
1469 | wdst[u32len] = 0; | |
1470 | } | |
1471 | ||
1472 | free (u32); | |
1473 | return res; | |
1474 | } | |
1475 | ||
c829a427 MV |
1476 | SCM |
1477 | scm_from_locale_stringn (const char *str, size_t len) | |
1478 | { | |
889975e5 MG |
1479 | const char *enc; |
1480 | scm_t_string_failed_conversion_handler hndl; | |
1481 | SCM inport; | |
1482 | scm_t_port *pt; | |
4d4528e7 | 1483 | |
9c44cd45 | 1484 | if (len == (size_t) -1) |
c829a427 | 1485 | len = strlen (str); |
9c44cd45 MG |
1486 | if (len == 0) |
1487 | return scm_nullstr; | |
1488 | ||
889975e5 MG |
1489 | inport = scm_current_input_port (); |
1490 | if (!SCM_UNBNDP (inport) && SCM_OPINPORTP (inport)) | |
1491 | { | |
1492 | pt = SCM_PTAB_ENTRY (inport); | |
1493 | enc = pt->encoding; | |
1494 | hndl = pt->ilseq_handler; | |
1495 | } | |
1496 | else | |
1497 | { | |
1498 | enc = NULL; | |
1499 | hndl = SCM_FAILED_CONVERSION_ERROR; | |
1500 | } | |
1501 | ||
1502 | return scm_from_stringn (str, len, enc, hndl); | |
c829a427 | 1503 | } |
4d4528e7 | 1504 | |
c829a427 MV |
1505 | SCM |
1506 | scm_from_locale_string (const char *str) | |
4d4528e7 | 1507 | { |
9c44cd45 MG |
1508 | if (str == NULL) |
1509 | return scm_nullstr; | |
1510 | ||
c829a427 MV |
1511 | return scm_from_locale_stringn (str, -1); |
1512 | } | |
4d4528e7 | 1513 | |
587a3355 MG |
1514 | SCM |
1515 | scm_i_from_utf8_string (const scm_t_uint8 *str) | |
1516 | { | |
1517 | return scm_from_stringn ((const char *) str, | |
1518 | strlen ((char *) str), "UTF-8", | |
1519 | SCM_FAILED_CONVERSION_ERROR); | |
1520 | } | |
1521 | ||
50b1996f MG |
1522 | /* Create a new scheme string from the C string STR. The memory of |
1523 | STR may be used directly as storage for the new string. */ | |
13a94556 LC |
1524 | /* FIXME: GC-wise, the only way to use the memory area pointed to by STR |
1525 | would be to register a finalizer to eventually free(3) STR, which isn't | |
1526 | worth it. Should we just deprecate the `scm_take_' functions? */ | |
c829a427 MV |
1527 | SCM |
1528 | scm_take_locale_stringn (char *str, size_t len) | |
1529 | { | |
13a94556 | 1530 | SCM res; |
48ddf0d9 | 1531 | |
13a94556 LC |
1532 | res = scm_from_locale_stringn (str, len); |
1533 | free (str); | |
c829a427 | 1534 | |
c829a427 MV |
1535 | return res; |
1536 | } | |
1537 | ||
48ddf0d9 KR |
1538 | SCM |
1539 | scm_take_locale_string (char *str) | |
1540 | { | |
1541 | return scm_take_locale_stringn (str, -1); | |
1542 | } | |
1543 | ||
9c44cd45 MG |
1544 | /* Change libunistring escapes (\uXXXX and \UXXXXXXXX) to \xXX \uXXXX |
1545 | and \UXXXXXX. */ | |
1546 | static void | |
1547 | unistring_escapes_to_guile_escapes (char **bufp, size_t *lenp) | |
1548 | { | |
1549 | char *before, *after; | |
1550 | size_t i, j; | |
1551 | ||
1552 | before = *bufp; | |
1553 | after = *bufp; | |
1554 | i = 0; | |
1555 | j = 0; | |
1556 | while (i < *lenp) | |
1557 | { | |
1558 | if ((i <= *lenp - 6) | |
1559 | && before[i] == '\\' | |
1560 | && before[i + 1] == 'u' | |
1561 | && before[i + 2] == '0' && before[i + 3] == '0') | |
1562 | { | |
1563 | /* Convert \u00NN to \xNN */ | |
1564 | after[j] = '\\'; | |
1565 | after[j + 1] = 'x'; | |
30a6b9ca MG |
1566 | after[j + 2] = tolower ((int) before[i + 4]); |
1567 | after[j + 3] = tolower ((int) before[i + 5]); | |
9c44cd45 MG |
1568 | i += 6; |
1569 | j += 4; | |
1570 | } | |
1571 | else if ((i <= *lenp - 10) | |
1572 | && before[i] == '\\' | |
1573 | && before[i + 1] == 'U' | |
1574 | && before[i + 2] == '0' && before[i + 3] == '0') | |
1575 | { | |
1576 | /* Convert \U00NNNNNN to \UNNNNNN */ | |
1577 | after[j] = '\\'; | |
1578 | after[j + 1] = 'U'; | |
30a6b9ca MG |
1579 | after[j + 2] = tolower ((int) before[i + 4]); |
1580 | after[j + 3] = tolower ((int) before[i + 5]); | |
1581 | after[j + 4] = tolower ((int) before[i + 6]); | |
1582 | after[j + 5] = tolower ((int) before[i + 7]); | |
1583 | after[j + 6] = tolower ((int) before[i + 8]); | |
1584 | after[j + 7] = tolower ((int) before[i + 9]); | |
9c44cd45 MG |
1585 | i += 10; |
1586 | j += 8; | |
1587 | } | |
1588 | else | |
1589 | { | |
1590 | after[j] = before[i]; | |
1591 | i++; | |
1592 | j++; | |
1593 | } | |
1594 | } | |
1595 | *lenp = j; | |
1596 | after = scm_realloc (after, j); | |
1597 | } | |
1598 | ||
c829a427 | 1599 | char * |
fac32b51 | 1600 | scm_to_locale_stringn (SCM str, size_t *lenp) |
c829a427 | 1601 | { |
889975e5 MG |
1602 | SCM outport; |
1603 | scm_t_port *pt; | |
9c44cd45 MG |
1604 | const char *enc; |
1605 | ||
889975e5 MG |
1606 | outport = scm_current_output_port (); |
1607 | if (!SCM_UNBNDP (outport) && SCM_OPOUTPORTP (outport)) | |
1608 | { | |
1609 | pt = SCM_PTAB_ENTRY (outport); | |
1610 | enc = pt->encoding; | |
1611 | } | |
1612 | else | |
1613 | enc = NULL; | |
9c44cd45 | 1614 | |
889975e5 MG |
1615 | return scm_to_stringn (str, lenp, |
1616 | enc, | |
1617 | scm_i_get_conversion_strategy (SCM_BOOL_F)); | |
9c44cd45 MG |
1618 | } |
1619 | ||
29bcdbb0 LC |
1620 | /* Return a malloc(3)-allocated buffer containing the contents of STR encoded |
1621 | according to ENCODING. If LENP is non-NULL, set it to the size in bytes of | |
1622 | the returned buffer. If the conversion to ENCODING fails, apply the strategy | |
1623 | defined by HANDLER. */ | |
9c44cd45 | 1624 | char * |
587a3355 | 1625 | scm_to_stringn (SCM str, size_t *lenp, const char *encoding, |
eca29b02 | 1626 | scm_t_string_failed_conversion_handler handler) |
9c44cd45 | 1627 | { |
9c44cd45 MG |
1628 | char *buf; |
1629 | size_t ilen, len, i; | |
889975e5 MG |
1630 | int ret; |
1631 | const char *enc; | |
4d4528e7 | 1632 | |
3ee86942 | 1633 | if (!scm_is_string (str)) |
c829a427 | 1634 | scm_wrong_type_arg_msg (NULL, 0, str, "string"); |
9c44cd45 MG |
1635 | ilen = scm_i_string_length (str); |
1636 | ||
1637 | if (ilen == 0) | |
1638 | { | |
1639 | buf = scm_malloc (1); | |
1640 | buf[0] = '\0'; | |
1641 | if (lenp) | |
1642 | *lenp = 0; | |
1643 | return buf; | |
1644 | } | |
587a3355 | 1645 | |
c829a427 | 1646 | if (lenp == NULL) |
9c44cd45 MG |
1647 | for (i = 0; i < ilen; i++) |
1648 | if (scm_i_string_ref (str, i) == '\0') | |
1649 | scm_misc_error (NULL, | |
1650 | "string contains #\\nul character: ~S", | |
1651 | scm_list_1 (str)); | |
1652 | ||
889975e5 | 1653 | if (scm_i_is_narrow_string (str) && (encoding == NULL)) |
c829a427 | 1654 | { |
889975e5 MG |
1655 | /* If using native Latin-1 encoding, just copy the string |
1656 | contents. */ | |
9c44cd45 MG |
1657 | if (lenp) |
1658 | { | |
1659 | buf = scm_malloc (ilen); | |
1660 | memcpy (buf, scm_i_string_chars (str), ilen); | |
1661 | *lenp = ilen; | |
1662 | return buf; | |
1663 | } | |
1664 | else | |
1665 | { | |
1666 | buf = scm_malloc (ilen + 1); | |
1667 | memcpy (buf, scm_i_string_chars (str), ilen); | |
1668 | buf[ilen] = '\0'; | |
1669 | return buf; | |
1670 | } | |
c829a427 | 1671 | } |
9c44cd45 | 1672 | |
587a3355 | 1673 | |
9c44cd45 MG |
1674 | buf = NULL; |
1675 | len = 0; | |
889975e5 MG |
1676 | enc = encoding; |
1677 | if (enc == NULL) | |
1678 | enc = "ISO-8859-1"; | |
1679 | if (scm_i_is_narrow_string (str)) | |
1680 | { | |
1681 | ret = mem_iconveh (scm_i_string_chars (str), ilen, | |
1682 | "ISO-8859-1", enc, | |
1683 | (enum iconv_ilseq_handler) handler, NULL, | |
1684 | &buf, &len); | |
9c44cd45 | 1685 | |
889975e5 MG |
1686 | if (ret == 0 && handler == SCM_FAILED_CONVERSION_ESCAPE_SEQUENCE) |
1687 | unistring_escapes_to_guile_escapes (&buf, &len); | |
9c44cd45 | 1688 | |
889975e5 | 1689 | if (ret != 0) |
a3d7d5d5 LC |
1690 | scm_encoding_error (NULL, "cannot convert to output locale ~s: \"~s\"", |
1691 | scm_list_2 (scm_from_locale_string (enc), str)); | |
889975e5 MG |
1692 | } |
1693 | else | |
1694 | { | |
1695 | buf = u32_conv_to_encoding (enc, | |
1696 | (enum iconv_ilseq_handler) handler, | |
1697 | (scm_t_uint32 *) scm_i_string_wide_chars (str), | |
1698 | ilen, | |
1699 | NULL, | |
1700 | NULL, &len); | |
1701 | if (buf == NULL) | |
a3d7d5d5 LC |
1702 | scm_encoding_error (NULL, "cannot convert to output locale ~s: \"~s\"", |
1703 | scm_list_2 (scm_from_locale_string (enc), str)); | |
1704 | ||
5f5920e0 MG |
1705 | if (handler == SCM_FAILED_CONVERSION_ESCAPE_SEQUENCE) |
1706 | unistring_escapes_to_guile_escapes (&buf, &len); | |
889975e5 | 1707 | } |
9c44cd45 | 1708 | if (lenp) |
4d4528e7 | 1709 | *lenp = len; |
9c44cd45 MG |
1710 | else |
1711 | { | |
1712 | buf = scm_realloc (buf, len + 1); | |
1713 | buf[len] = '\0'; | |
1714 | } | |
24933780 | 1715 | |
c829a427 | 1716 | scm_remember_upto_here_1 (str); |
9c44cd45 | 1717 | return buf; |
4d4528e7 | 1718 | } |
af68e5e5 | 1719 | |
c829a427 MV |
1720 | char * |
1721 | scm_to_locale_string (SCM str) | |
1722 | { | |
1723 | return scm_to_locale_stringn (str, NULL); | |
1724 | } | |
af68e5e5 | 1725 | |
587a3355 MG |
1726 | scm_t_uint8 * |
1727 | scm_i_to_utf8_string (SCM str) | |
1728 | { | |
1729 | char *u8str; | |
1730 | u8str = scm_to_stringn (str, NULL, "UTF-8", SCM_FAILED_CONVERSION_ERROR); | |
1731 | return (scm_t_uint8 *) u8str; | |
1732 | } | |
1733 | ||
c829a427 MV |
1734 | size_t |
1735 | scm_to_locale_stringbuf (SCM str, char *buf, size_t max_len) | |
1736 | { | |
1737 | size_t len; | |
9c44cd45 | 1738 | char *result = NULL; |
3ee86942 | 1739 | if (!scm_is_string (str)) |
c829a427 | 1740 | scm_wrong_type_arg_msg (NULL, 0, str, "string"); |
9c44cd45 MG |
1741 | result = scm_to_locale_stringn (str, &len); |
1742 | ||
1743 | memcpy (buf, result, (len > max_len) ? max_len : len); | |
1744 | free (result); | |
1745 | ||
c829a427 MV |
1746 | scm_remember_upto_here_1 (str); |
1747 | return len; | |
1748 | } | |
af68e5e5 | 1749 | |
a3d7d5d5 LC |
1750 | \f |
1751 | /* Unicode string normalization. */ | |
1752 | ||
edb7bb47 JG |
1753 | /* This function is a partial clone of SCM_STRING_TO_U32_BUF from |
1754 | libguile/i18n.c. It would be useful to have this factored out into a more | |
1755 | convenient location, but its use of alloca makes that tricky to do. */ | |
1756 | ||
1757 | static SCM | |
1758 | normalize_str (SCM string, uninorm_t form) | |
1759 | { | |
1760 | SCM ret; | |
1761 | scm_t_uint32 *w_str; | |
1762 | scm_t_wchar *cbuf; | |
1763 | size_t rlen, len = scm_i_string_length (string); | |
1764 | ||
1765 | if (scm_i_is_narrow_string (string)) | |
1766 | { | |
1767 | size_t i; | |
1768 | const char *buf = scm_i_string_chars (string); | |
1769 | ||
1770 | w_str = alloca (sizeof (scm_t_wchar) * (len + 1)); | |
1771 | ||
1772 | for (i = 0; i < len; i ++) | |
1773 | w_str[i] = (unsigned char) buf[i]; | |
1774 | w_str[len] = 0; | |
1775 | } | |
d8164b04 JG |
1776 | else |
1777 | w_str = (scm_t_uint32 *) scm_i_string_wide_chars (string); | |
1778 | ||
edb7bb47 JG |
1779 | w_str = u32_normalize (form, w_str, len, NULL, &rlen); |
1780 | ||
1781 | ret = scm_i_make_wide_string (rlen, &cbuf); | |
1782 | u32_cpy ((scm_t_uint32 *) cbuf, w_str, rlen); | |
1783 | free (w_str); | |
d8164b04 JG |
1784 | |
1785 | scm_i_try_narrow_string (ret); | |
1786 | ||
edb7bb47 JG |
1787 | return ret; |
1788 | } | |
1789 | ||
1790 | SCM_DEFINE (scm_string_normalize_nfc, "string-normalize-nfc", 1, 0, 0, | |
1791 | (SCM string), | |
1792 | "Returns the NFC normalized form of @var{string}.") | |
1793 | #define FUNC_NAME s_scm_string_normalize_nfc | |
1794 | { | |
1795 | SCM_VALIDATE_STRING (1, string); | |
1796 | return normalize_str (string, UNINORM_NFC); | |
1797 | } | |
1798 | #undef FUNC_NAME | |
1799 | ||
1800 | SCM_DEFINE (scm_string_normalize_nfd, "string-normalize-nfd", 1, 0, 0, | |
1801 | (SCM string), | |
1802 | "Returns the NFD normalized form of @var{string}.") | |
1803 | #define FUNC_NAME s_scm_string_normalize_nfd | |
1804 | { | |
1805 | SCM_VALIDATE_STRING (1, string); | |
1806 | return normalize_str (string, UNINORM_NFD); | |
1807 | } | |
1808 | #undef FUNC_NAME | |
1809 | ||
1810 | SCM_DEFINE (scm_string_normalize_nfkc, "string-normalize-nfkc", 1, 0, 0, | |
1811 | (SCM string), | |
1812 | "Returns the NFKC normalized form of @var{string}.") | |
1813 | #define FUNC_NAME s_scm_string_normalize_nfkc | |
1814 | { | |
1815 | SCM_VALIDATE_STRING (1, string); | |
1816 | return normalize_str (string, UNINORM_NFKC); | |
1817 | } | |
1818 | #undef FUNC_NAME | |
1819 | ||
1820 | SCM_DEFINE (scm_string_normalize_nfkd, "string-normalize-nfkd", 1, 0, 0, | |
1821 | (SCM string), | |
1822 | "Returns the NFKD normalized form of @var{string}.") | |
1823 | #define FUNC_NAME s_scm_string_normalize_nfkd | |
1824 | { | |
1825 | SCM_VALIDATE_STRING (1, string); | |
1826 | return normalize_str (string, UNINORM_NFKD); | |
1827 | } | |
1828 | #undef FUNC_NAME | |
1829 | ||
3ee86942 MV |
1830 | /* converts C scm_array of strings to SCM scm_list of strings. */ |
1831 | /* If argc < 0, a null terminated scm_array is assumed. */ | |
9c44cd45 | 1832 | SCM |
3ee86942 MV |
1833 | scm_makfromstrs (int argc, char **argv) |
1834 | { | |
1835 | int i = argc; | |
1836 | SCM lst = SCM_EOL; | |
1837 | if (0 > i) | |
1838 | for (i = 0; argv[i]; i++); | |
1839 | while (i--) | |
1840 | lst = scm_cons (scm_from_locale_string (argv[i]), lst); | |
1841 | return lst; | |
1842 | } | |
1843 | ||
c829a427 MV |
1844 | /* Return a newly allocated array of char pointers to each of the strings |
1845 | in args, with a terminating NULL pointer. */ | |
1846 | ||
1847 | char ** | |
1848 | scm_i_allocate_string_pointers (SCM list) | |
2a776823 | 1849 | #define FUNC_NAME "scm_i_allocate_string_pointers" |
af68e5e5 | 1850 | { |
c829a427 MV |
1851 | char **result; |
1852 | int len = scm_ilength (list); | |
1853 | int i; | |
1854 | ||
1855 | if (len < 0) | |
1856 | scm_wrong_type_arg_msg (NULL, 0, list, "proper list"); | |
1857 | ||
2a776823 LC |
1858 | result = scm_gc_malloc ((len + 1) * sizeof (char *), |
1859 | "string pointers"); | |
c829a427 | 1860 | result[len] = NULL; |
c829a427 MV |
1861 | |
1862 | /* The list might be have been modified in another thread, so | |
1863 | we check LIST before each access. | |
1864 | */ | |
d2e53ed6 | 1865 | for (i = 0; i < len && scm_is_pair (list); i++) |
c829a427 | 1866 | { |
2a776823 LC |
1867 | SCM str; |
1868 | size_t len; | |
1869 | ||
1870 | str = SCM_CAR (list); | |
1871 | len = scm_c_string_length (str); | |
1872 | ||
1873 | result[i] = scm_gc_malloc_pointerless (len + 1, "string pointers"); | |
1874 | memcpy (result[i], scm_i_string_chars (str), len); | |
1875 | result[i][len] = '\0'; | |
1876 | ||
c829a427 MV |
1877 | list = SCM_CDR (list); |
1878 | } | |
1879 | ||
c829a427 | 1880 | return result; |
af68e5e5 | 1881 | } |
2a776823 | 1882 | #undef FUNC_NAME |
24933780 | 1883 | |
6f14f578 MV |
1884 | void |
1885 | scm_i_get_substring_spec (size_t len, | |
1886 | SCM start, size_t *cstart, | |
1887 | SCM end, size_t *cend) | |
1888 | { | |
1889 | if (SCM_UNBNDP (start)) | |
1890 | *cstart = 0; | |
1891 | else | |
1892 | *cstart = scm_to_unsigned_integer (start, 0, len); | |
1893 | ||
1894 | if (SCM_UNBNDP (end)) | |
1895 | *cend = len; | |
1896 | else | |
1897 | *cend = scm_to_unsigned_integer (end, *cstart, len); | |
1898 | } | |
1899 | ||
3ee86942 MV |
1900 | #if SCM_ENABLE_DEPRECATED |
1901 | ||
556d75db MV |
1902 | /* When these definitions are removed, it becomes reasonable to use |
1903 | read-only strings for string literals. For that, change the reader | |
1904 | to create string literals with scm_c_substring_read_only instead of | |
1905 | with scm_c_substring_copy. | |
1906 | */ | |
1907 | ||
3ee86942 | 1908 | int |
fe78c51a | 1909 | scm_i_deprecated_stringp (SCM str) |
3ee86942 MV |
1910 | { |
1911 | scm_c_issue_deprecation_warning | |
1912 | ("SCM_STRINGP is deprecated. Use scm_is_string instead."); | |
1913 | ||
2616f0e0 | 1914 | return scm_is_string (str); |
3ee86942 MV |
1915 | } |
1916 | ||
1917 | char * | |
fe78c51a | 1918 | scm_i_deprecated_string_chars (SCM str) |
3ee86942 MV |
1919 | { |
1920 | char *chars; | |
1921 | ||
1922 | scm_c_issue_deprecation_warning | |
1923 | ("SCM_STRING_CHARS is deprecated. See the manual for alternatives."); | |
1924 | ||
2616f0e0 MV |
1925 | /* We don't accept shared substrings here since they are not |
1926 | null-terminated. | |
1927 | */ | |
1928 | if (IS_SH_STRING (str)) | |
c291b588 LC |
1929 | scm_misc_error (NULL, |
1930 | "SCM_STRING_CHARS does not work with shared substrings", | |
2616f0e0 MV |
1931 | SCM_EOL); |
1932 | ||
877f06c3 | 1933 | /* We explicitly test for read-only strings to produce a better |
556d75db MV |
1934 | error message. |
1935 | */ | |
1936 | ||
1937 | if (IS_RO_STRING (str)) | |
c291b588 LC |
1938 | scm_misc_error (NULL, |
1939 | "SCM_STRING_CHARS does not work with read-only strings", | |
556d75db | 1940 | SCM_EOL); |
c291b588 | 1941 | |
2616f0e0 | 1942 | /* The following is still wrong, of course... |
3ee86942 | 1943 | */ |
9c44cd45 | 1944 | str = scm_i_string_start_writing (str); |
3ee86942 MV |
1945 | chars = scm_i_string_writable_chars (str); |
1946 | scm_i_string_stop_writing (); | |
1947 | return chars; | |
1948 | } | |
1949 | ||
1950 | size_t | |
fe78c51a | 1951 | scm_i_deprecated_string_length (SCM str) |
3ee86942 MV |
1952 | { |
1953 | scm_c_issue_deprecation_warning | |
1954 | ("SCM_STRING_LENGTH is deprecated. Use scm_c_string_length instead."); | |
1955 | return scm_c_string_length (str); | |
1956 | } | |
1957 | ||
1958 | #endif | |
1959 | ||
2a610be5 AW |
1960 | static SCM |
1961 | string_handle_ref (scm_t_array_handle *h, size_t index) | |
1962 | { | |
1963 | return scm_c_string_ref (h->array, index); | |
1964 | } | |
1965 | ||
1966 | static void | |
1967 | string_handle_set (scm_t_array_handle *h, size_t index, SCM val) | |
1968 | { | |
1969 | scm_c_string_set_x (h->array, index, val); | |
1970 | } | |
1971 | ||
1972 | static void | |
1973 | string_get_handle (SCM v, scm_t_array_handle *h) | |
1974 | { | |
1975 | h->array = v; | |
1976 | h->ndims = 1; | |
1977 | h->dims = &h->dim0; | |
1978 | h->dim0.lbnd = 0; | |
1979 | h->dim0.ubnd = scm_c_string_length (v) - 1; | |
1980 | h->dim0.inc = 1; | |
1981 | h->element_type = SCM_ARRAY_ELEMENT_TYPE_CHAR; | |
1982 | h->elements = h->writable_elements = NULL; | |
1983 | } | |
1984 | ||
c5f17102 | 1985 | SCM_ARRAY_IMPLEMENTATION (scm_tc7_string, 0x7f, |
2a610be5 | 1986 | string_handle_ref, string_handle_set, |
f65e0168 LC |
1987 | string_get_handle) |
1988 | SCM_VECTOR_IMPLEMENTATION (SCM_ARRAY_ELEMENT_TYPE_CHAR, scm_make_string) | |
2a610be5 | 1989 | |
0f2d19dd JB |
1990 | void |
1991 | scm_init_strings () | |
0f2d19dd | 1992 | { |
3ee86942 | 1993 | scm_nullstr = scm_i_make_string (0, NULL); |
7c33806a | 1994 | |
a0599745 | 1995 | #include "libguile/strings.x" |
0f2d19dd JB |
1996 | } |
1997 | ||
89e00824 ML |
1998 | |
1999 | /* | |
2000 | Local Variables: | |
2001 | c-file-style: "gnu" | |
2002 | End: | |
2003 | */ |