Commit | Line | Data |
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cf64dca6 | 1 | /* Copyright (C) 1995,1996,1998,2000,2001, 2004, 2006, 2008, 2009, 2010, 2011, 2012, 2013, 2014 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 | |
cdd47ec7 | 25 | #include <alloca.h> |
faf2c9d7 | 26 | #include <string.h> |
3ee86942 | 27 | #include <stdio.h> |
9c44cd45 | 28 | #include <ctype.h> |
edb7bb47 | 29 | #include <uninorm.h> |
9c44cd45 | 30 | #include <unistr.h> |
eca29b02 | 31 | #include <uniconv.h> |
f6f4feb0 | 32 | #include <c-strcase.h> |
faf2c9d7 | 33 | |
889975e5 MG |
34 | #include "striconveh.h" |
35 | ||
a0599745 MD |
36 | #include "libguile/_scm.h" |
37 | #include "libguile/chars.h" | |
7c33806a | 38 | #include "libguile/root.h" |
a0599745 | 39 | #include "libguile/strings.h" |
f6f4feb0 MW |
40 | #include "libguile/ports.h" |
41 | #include "libguile/ports-internal.h" | |
a3d7d5d5 | 42 | #include "libguile/error.h" |
f45eccff | 43 | #include "libguile/generalized-vectors.h" |
1afff620 | 44 | #include "libguile/deprecation.h" |
a0599745 | 45 | #include "libguile/validate.h" |
d31b9519 | 46 | #include "libguile/private-options.h" |
1afff620 | 47 | |
0f2d19dd JB |
48 | \f |
49 | ||
50 | /* {Strings} | |
51 | */ | |
52 | ||
3ee86942 MV |
53 | |
54 | /* Stringbufs | |
55 | * | |
56 | * XXX - keeping an accurate refcount during GC seems to be quite | |
57 | * tricky, so we just keep score of whether a stringbuf might be | |
50b1996f | 58 | * shared, not whether it definitely is. |
3ee86942 MV |
59 | * |
60 | * The scheme I (mvo) tried to keep an accurate reference count would | |
61 | * recount all strings that point to a stringbuf during the mark-phase | |
62 | * of the GC. This was done since one cannot access the stringbuf of | |
63 | * a string when that string is freed (in order to decrease the | |
64 | * reference count). The memory of the stringbuf might have been | |
65 | * reused already for something completely different. | |
66 | * | |
67 | * This recounted worked for a small number of threads beating on | |
68 | * cow-strings, but it failed randomly with more than 10 threads, say. | |
69 | * I couldn't figure out what went wrong, so I used the conservative | |
70 | * approach implemented below. | |
50b1996f | 71 | * |
ba54a202 LC |
72 | * There are 2 storage strategies for stringbufs: 8-bit and wide. 8-bit |
73 | * strings are ISO-8859-1-encoded strings; wide strings are 32-bit (UCS-4) | |
74 | * strings. | |
3ee86942 MV |
75 | */ |
76 | ||
ba54a202 LC |
77 | /* The size in words of the stringbuf header (type tag + size). */ |
78 | #define STRINGBUF_HEADER_SIZE 2U | |
79 | ||
80 | #define STRINGBUF_HEADER_BYTES (STRINGBUF_HEADER_SIZE * sizeof (SCM)) | |
81 | ||
35920c00 | 82 | #define STRINGBUF_F_SHARED SCM_I_STRINGBUF_F_SHARED |
5f236208 | 83 | #define STRINGBUF_F_WIDE SCM_I_STRINGBUF_F_WIDE |
3ee86942 MV |
84 | |
85 | #define STRINGBUF_TAG scm_tc7_stringbuf | |
86 | #define STRINGBUF_SHARED(buf) (SCM_CELL_WORD_0(buf) & STRINGBUF_F_SHARED) | |
9c44cd45 | 87 | #define STRINGBUF_WIDE(buf) (SCM_CELL_WORD_0(buf) & STRINGBUF_F_WIDE) |
3ee86942 | 88 | |
100e20c7 | 89 | #define STRINGBUF_CONTENTS(buf) ((void *) \ |
ba54a202 LC |
90 | SCM_CELL_OBJECT_LOC (buf, \ |
91 | STRINGBUF_HEADER_SIZE)) | |
100e20c7 LC |
92 | #define STRINGBUF_CHARS(buf) ((unsigned char *) STRINGBUF_CONTENTS (buf)) |
93 | #define STRINGBUF_WIDE_CHARS(buf) ((scm_t_wchar *) STRINGBUF_CONTENTS (buf)) | |
3ee86942 | 94 | |
100e20c7 | 95 | #define STRINGBUF_LENGTH(buf) (SCM_CELL_WORD_1 (buf)) |
3ee86942 | 96 | |
9b41542f LC |
97 | #define SET_STRINGBUF_SHARED(buf) \ |
98 | do \ | |
99 | { \ | |
100 | /* Don't modify BUF if it's already marked as shared since it might be \ | |
101 | a read-only, statically allocated stringbuf. */ \ | |
102 | if (SCM_LIKELY (!STRINGBUF_SHARED (buf))) \ | |
103 | SCM_SET_CELL_WORD_0 ((buf), SCM_CELL_WORD_0 (buf) | STRINGBUF_F_SHARED); \ | |
104 | } \ | |
105 | while (0) | |
3ee86942 | 106 | |
56a3dcd4 | 107 | #ifdef SCM_STRING_LENGTH_HISTOGRAM |
3ee86942 MV |
108 | static size_t lenhist[1001]; |
109 | #endif | |
110 | ||
50b1996f MG |
111 | /* Make a stringbuf with space for LEN 8-bit Latin-1-encoded |
112 | characters. */ | |
3ee86942 MV |
113 | static SCM |
114 | make_stringbuf (size_t len) | |
0f2d19dd | 115 | { |
3ee86942 MV |
116 | /* XXX - for the benefit of SCM_STRING_CHARS, SCM_SYMBOL_CHARS and |
117 | scm_i_symbol_chars, all stringbufs are null-terminated. Once | |
118 | SCM_STRING_CHARS and SCM_SYMBOL_CHARS are removed and the code | |
119 | has been changed for scm_i_symbol_chars, this null-termination | |
120 | can be dropped. | |
121 | */ | |
122 | ||
ba54a202 LC |
123 | SCM buf; |
124 | ||
56a3dcd4 | 125 | #ifdef SCM_STRING_LENGTH_HISTOGRAM |
3ee86942 MV |
126 | if (len < 1000) |
127 | lenhist[len]++; | |
128 | else | |
129 | lenhist[1000]++; | |
130 | #endif | |
0f2d19dd | 131 | |
21041372 | 132 | buf = SCM_PACK_POINTER (scm_gc_malloc_pointerless (STRINGBUF_HEADER_BYTES + len + 1, |
ba54a202 LC |
133 | "string")); |
134 | ||
135 | SCM_SET_CELL_TYPE (buf, STRINGBUF_TAG); | |
136 | SCM_SET_CELL_WORD_1 (buf, (scm_t_bits) len); | |
137 | ||
138 | STRINGBUF_CHARS (buf)[len] = 0; | |
139 | ||
140 | return buf; | |
3ee86942 | 141 | } |
e53cc817 | 142 | |
50b1996f MG |
143 | /* Make a stringbuf with space for LEN 32-bit UCS-4-encoded |
144 | characters. */ | |
9c44cd45 MG |
145 | static SCM |
146 | make_wide_stringbuf (size_t len) | |
147 | { | |
ba54a202 LC |
148 | SCM buf; |
149 | size_t raw_len; | |
150 | ||
56a3dcd4 | 151 | #ifdef SCM_STRING_LENGTH_HISTOGRAM |
9c44cd45 MG |
152 | if (len < 1000) |
153 | lenhist[len]++; | |
154 | else | |
155 | lenhist[1000]++; | |
156 | #endif | |
157 | ||
ba54a202 | 158 | raw_len = (len + 1) * sizeof (scm_t_wchar); |
21041372 | 159 | buf = SCM_PACK_POINTER (scm_gc_malloc_pointerless (STRINGBUF_HEADER_BYTES + raw_len, |
ba54a202 LC |
160 | "string")); |
161 | ||
162 | SCM_SET_CELL_TYPE (buf, STRINGBUF_TAG | STRINGBUF_F_WIDE); | |
163 | SCM_SET_CELL_WORD_1 (buf, (scm_t_bits) len); | |
164 | ||
165 | STRINGBUF_WIDE_CHARS (buf)[len] = 0; | |
166 | ||
167 | return buf; | |
9c44cd45 MG |
168 | } |
169 | ||
ba54a202 LC |
170 | /* Return a UCS-4-encoded stringbuf containing the (possibly Latin-1-encoded) |
171 | characters from BUF. */ | |
172 | static SCM | |
173 | wide_stringbuf (SCM buf) | |
9c44cd45 | 174 | { |
ba54a202 | 175 | SCM new_buf; |
9c44cd45 MG |
176 | |
177 | if (STRINGBUF_WIDE (buf)) | |
ba54a202 LC |
178 | new_buf = buf; |
179 | else | |
9c44cd45 | 180 | { |
ba54a202 LC |
181 | size_t i, len; |
182 | scm_t_wchar *mem; | |
9c44cd45 | 183 | |
ba54a202 | 184 | len = STRINGBUF_LENGTH (buf); |
9c44cd45 | 185 | |
ba54a202 | 186 | new_buf = make_wide_stringbuf (len); |
9c44cd45 | 187 | |
ba54a202 | 188 | mem = STRINGBUF_WIDE_CHARS (new_buf); |
9c44cd45 | 189 | for (i = 0; i < len; i++) |
ba54a202 | 190 | mem[i] = (scm_t_wchar) STRINGBUF_CHARS (buf)[i]; |
9c44cd45 | 191 | mem[len] = 0; |
9c44cd45 | 192 | } |
ba54a202 LC |
193 | |
194 | return new_buf; | |
3ee86942 | 195 | } |
bd9e24b3 | 196 | |
ba54a202 LC |
197 | /* Return a Latin-1-encoded stringbuf containing the (possibly UCS-4-encoded) |
198 | characters from BUF, if possible. */ | |
199 | static SCM | |
587a3355 MG |
200 | narrow_stringbuf (SCM buf) |
201 | { | |
ba54a202 | 202 | SCM new_buf; |
587a3355 MG |
203 | |
204 | if (!STRINGBUF_WIDE (buf)) | |
ba54a202 LC |
205 | new_buf = buf; |
206 | else | |
207 | { | |
208 | size_t i, len; | |
209 | scm_t_wchar *wmem; | |
210 | unsigned char *mem; | |
587a3355 | 211 | |
ba54a202 LC |
212 | len = STRINGBUF_LENGTH (buf); |
213 | wmem = STRINGBUF_WIDE_CHARS (buf); | |
587a3355 | 214 | |
ba54a202 LC |
215 | for (i = 0; i < len; i++) |
216 | if (wmem[i] > 0xFF) | |
217 | /* BUF cannot be narrowed. */ | |
218 | return buf; | |
587a3355 | 219 | |
ba54a202 | 220 | new_buf = make_stringbuf (len); |
587a3355 | 221 | |
ba54a202 LC |
222 | mem = STRINGBUF_CHARS (new_buf); |
223 | for (i = 0; i < len; i++) | |
224 | mem[i] = (unsigned char) wmem[i]; | |
225 | mem[len] = 0; | |
226 | } | |
227 | ||
228 | return new_buf; | |
587a3355 MG |
229 | } |
230 | ||
9de87eea | 231 | scm_i_pthread_mutex_t stringbuf_write_mutex = SCM_I_PTHREAD_MUTEX_INITIALIZER; |
bd9e24b3 | 232 | |
ba54a202 | 233 | \f |
3ee86942 MV |
234 | /* Copy-on-write strings. |
235 | */ | |
bd9e24b3 | 236 | |
3ee86942 | 237 | #define STRING_TAG scm_tc7_string |
bd9e24b3 | 238 | |
3ee86942 MV |
239 | #define STRING_STRINGBUF(str) (SCM_CELL_OBJECT_1(str)) |
240 | #define STRING_START(str) ((size_t)SCM_CELL_WORD_2(str)) | |
241 | #define STRING_LENGTH(str) ((size_t)SCM_CELL_WORD_3(str)) | |
bd9e24b3 | 242 | |
3ee86942 MV |
243 | #define SET_STRING_STRINGBUF(str,buf) (SCM_SET_CELL_OBJECT_1(str,buf)) |
244 | #define SET_STRING_START(str,start) (SCM_SET_CELL_WORD_2(str,start)) | |
245 | ||
dc7da0be | 246 | #define IS_STRING(str) (SCM_HAS_TYP7 (str, STRING_TAG)) |
3ee86942 | 247 | |
ed35de72 MV |
248 | /* Read-only strings. |
249 | */ | |
250 | ||
35920c00 | 251 | #define RO_STRING_TAG scm_tc7_ro_string |
ed35de72 MV |
252 | #define IS_RO_STRING(str) (SCM_CELL_TYPE(str)==RO_STRING_TAG) |
253 | ||
e1b29f6a MV |
254 | /* Mutation-sharing substrings |
255 | */ | |
256 | ||
257 | #define SH_STRING_TAG (scm_tc7_string + 0x100) | |
258 | ||
259 | #define SH_STRING_STRING(sh) (SCM_CELL_OBJECT_1(sh)) | |
260 | /* START and LENGTH as for STRINGs. */ | |
261 | ||
262 | #define IS_SH_STRING(str) (SCM_CELL_TYPE(str)==SH_STRING_TAG) | |
263 | ||
db071766 AW |
264 | void |
265 | scm_i_print_stringbuf (SCM exp, SCM port, scm_print_state *pstate) | |
266 | { | |
267 | SCM str; | |
268 | ||
269 | scm_i_pthread_mutex_lock (&stringbuf_write_mutex); | |
270 | SET_STRINGBUF_SHARED (exp); | |
271 | scm_i_pthread_mutex_unlock (&stringbuf_write_mutex); | |
272 | ||
273 | str = scm_double_cell (RO_STRING_TAG, SCM_UNPACK(exp), | |
274 | 0, STRINGBUF_LENGTH (exp)); | |
275 | ||
276 | scm_puts ("#<stringbuf ", port); | |
277 | scm_iprin1 (str, port, pstate); | |
278 | scm_puts (">", port); | |
279 | } | |
280 | ||
e7efe8e7 AW |
281 | SCM scm_nullstr; |
282 | ||
60617d81 MW |
283 | static SCM null_stringbuf; |
284 | ||
285 | static void | |
286 | init_null_stringbuf (void) | |
287 | { | |
288 | null_stringbuf = make_stringbuf (0); | |
289 | SET_STRINGBUF_SHARED (null_stringbuf); | |
290 | } | |
291 | ||
50b1996f MG |
292 | /* Create a scheme string with space for LEN 8-bit Latin-1-encoded |
293 | characters. CHARSP, if not NULL, will be set to location of the | |
190d4b0d LC |
294 | char array. If READ_ONLY_P, the returned string is read-only; |
295 | otherwise it is writable. */ | |
3ee86942 | 296 | SCM |
190d4b0d | 297 | scm_i_make_string (size_t len, char **charsp, int read_only_p) |
3ee86942 | 298 | { |
69cd5299 | 299 | SCM buf; |
3ee86942 | 300 | SCM res; |
69cd5299 MW |
301 | |
302 | if (len == 0) | |
303 | { | |
60617d81 MW |
304 | static scm_i_pthread_once_t once = SCM_I_PTHREAD_ONCE_INIT; |
305 | scm_i_pthread_once (&once, init_null_stringbuf); | |
69cd5299 MW |
306 | buf = null_stringbuf; |
307 | } | |
308 | else | |
309 | buf = make_stringbuf (len); | |
310 | ||
3ee86942 | 311 | if (charsp) |
f59cf998 | 312 | *charsp = (char *) STRINGBUF_CHARS (buf); |
190d4b0d LC |
313 | res = scm_double_cell (read_only_p ? RO_STRING_TAG : STRING_TAG, |
314 | SCM_UNPACK (buf), | |
315 | (scm_t_bits) 0, (scm_t_bits) len); | |
3ee86942 | 316 | return res; |
0f2d19dd JB |
317 | } |
318 | ||
50b1996f MG |
319 | /* Create a scheme string with space for LEN 32-bit UCS-4-encoded |
320 | characters. CHARSP, if not NULL, will be set to location of the | |
190d4b0d LC |
321 | character array. If READ_ONLY_P, the returned string is read-only; |
322 | otherwise it is writable. */ | |
9c44cd45 | 323 | SCM |
190d4b0d | 324 | scm_i_make_wide_string (size_t len, scm_t_wchar **charsp, int read_only_p) |
9c44cd45 MG |
325 | { |
326 | SCM buf = make_wide_stringbuf (len); | |
327 | SCM res; | |
328 | if (charsp) | |
329 | *charsp = STRINGBUF_WIDE_CHARS (buf); | |
190d4b0d LC |
330 | res = scm_double_cell (read_only_p ? RO_STRING_TAG : STRING_TAG, |
331 | SCM_UNPACK (buf), | |
9c44cd45 MG |
332 | (scm_t_bits) 0, (scm_t_bits) len); |
333 | return res; | |
334 | } | |
335 | ||
3ee86942 MV |
336 | static void |
337 | validate_substring_args (SCM str, size_t start, size_t end) | |
338 | { | |
339 | if (!IS_STRING (str)) | |
340 | scm_wrong_type_arg_msg (NULL, 0, str, "string"); | |
341 | if (start > STRING_LENGTH (str)) | |
342 | scm_out_of_range (NULL, scm_from_size_t (start)); | |
343 | if (end > STRING_LENGTH (str) || end < start) | |
344 | scm_out_of_range (NULL, scm_from_size_t (end)); | |
345 | } | |
0f2d19dd | 346 | |
e1b29f6a MV |
347 | static inline void |
348 | get_str_buf_start (SCM *str, SCM *buf, size_t *start) | |
349 | { | |
350 | *start = STRING_START (*str); | |
351 | if (IS_SH_STRING (*str)) | |
352 | { | |
353 | *str = SH_STRING_STRING (*str); | |
354 | *start += STRING_START (*str); | |
355 | } | |
356 | *buf = STRING_STRINGBUF (*str); | |
357 | } | |
358 | ||
3ee86942 MV |
359 | SCM |
360 | scm_i_substring (SCM str, size_t start, size_t end) | |
0f2d19dd | 361 | { |
17bec545 MW |
362 | if (start == end) |
363 | return scm_i_make_string (0, NULL, 0); | |
364 | else | |
365 | { | |
366 | SCM buf; | |
367 | size_t str_start; | |
368 | get_str_buf_start (&str, &buf, &str_start); | |
369 | scm_i_pthread_mutex_lock (&stringbuf_write_mutex); | |
370 | SET_STRINGBUF_SHARED (buf); | |
371 | scm_i_pthread_mutex_unlock (&stringbuf_write_mutex); | |
372 | return scm_double_cell (STRING_TAG, SCM_UNPACK(buf), | |
373 | (scm_t_bits)str_start + start, | |
374 | (scm_t_bits) end - start); | |
375 | } | |
0f2d19dd JB |
376 | } |
377 | ||
ed35de72 MV |
378 | SCM |
379 | scm_i_substring_read_only (SCM str, size_t start, size_t end) | |
380 | { | |
17bec545 MW |
381 | if (start == end) |
382 | return scm_i_make_string (0, NULL, 1); | |
383 | else | |
384 | { | |
385 | SCM buf; | |
386 | size_t str_start; | |
387 | get_str_buf_start (&str, &buf, &str_start); | |
388 | scm_i_pthread_mutex_lock (&stringbuf_write_mutex); | |
389 | SET_STRINGBUF_SHARED (buf); | |
390 | scm_i_pthread_mutex_unlock (&stringbuf_write_mutex); | |
391 | return scm_double_cell (RO_STRING_TAG, SCM_UNPACK(buf), | |
392 | (scm_t_bits)str_start + start, | |
393 | (scm_t_bits) end - start); | |
394 | } | |
ed35de72 MV |
395 | } |
396 | ||
3ee86942 MV |
397 | SCM |
398 | scm_i_substring_copy (SCM str, size_t start, size_t end) | |
399 | { | |
d5b75b6c MW |
400 | if (start == end) |
401 | return scm_i_make_string (0, NULL, 0); | |
9c44cd45 MG |
402 | else |
403 | { | |
d5b75b6c MW |
404 | size_t len = end - start; |
405 | SCM buf, my_buf, substr; | |
406 | size_t str_start; | |
407 | int wide = 0; | |
408 | get_str_buf_start (&str, &buf, &str_start); | |
409 | if (scm_i_is_narrow_string (str)) | |
410 | { | |
411 | my_buf = make_stringbuf (len); | |
412 | memcpy (STRINGBUF_CHARS (my_buf), | |
413 | STRINGBUF_CHARS (buf) + str_start + start, len); | |
414 | } | |
415 | else | |
416 | { | |
417 | my_buf = make_wide_stringbuf (len); | |
418 | u32_cpy ((scm_t_uint32 *) STRINGBUF_WIDE_CHARS (my_buf), | |
419 | (scm_t_uint32 *) (STRINGBUF_WIDE_CHARS (buf) + str_start | |
420 | + start), len); | |
421 | wide = 1; | |
422 | } | |
423 | scm_remember_upto_here_1 (buf); | |
424 | substr = scm_double_cell (STRING_TAG, SCM_UNPACK (my_buf), | |
425 | (scm_t_bits) 0, (scm_t_bits) len); | |
426 | if (wide) | |
427 | scm_i_try_narrow_string (substr); | |
428 | return substr; | |
9c44cd45 | 429 | } |
3ee86942 | 430 | } |
0f2d19dd | 431 | |
e1b29f6a MV |
432 | SCM |
433 | scm_i_substring_shared (SCM str, size_t start, size_t end) | |
434 | { | |
435 | if (start == 0 && end == STRING_LENGTH (str)) | |
436 | return str; | |
17bec545 MW |
437 | else if (start == end) |
438 | return scm_i_make_string (0, NULL, 0); | |
439 | else | |
e1b29f6a MV |
440 | { |
441 | size_t len = end - start; | |
442 | if (IS_SH_STRING (str)) | |
443 | { | |
444 | start += STRING_START (str); | |
445 | str = SH_STRING_STRING (str); | |
446 | } | |
447 | return scm_double_cell (SH_STRING_TAG, SCM_UNPACK(str), | |
448 | (scm_t_bits)start, (scm_t_bits) len); | |
449 | } | |
450 | } | |
451 | ||
3ee86942 MV |
452 | SCM |
453 | scm_c_substring (SCM str, size_t start, size_t end) | |
454 | { | |
455 | validate_substring_args (str, start, end); | |
456 | return scm_i_substring (str, start, end); | |
457 | } | |
ee149d03 | 458 | |
ed35de72 MV |
459 | SCM |
460 | scm_c_substring_read_only (SCM str, size_t start, size_t end) | |
461 | { | |
462 | validate_substring_args (str, start, end); | |
463 | return scm_i_substring_read_only (str, start, end); | |
464 | } | |
465 | ||
0f2d19dd | 466 | SCM |
3ee86942 | 467 | scm_c_substring_copy (SCM str, size_t start, size_t end) |
0f2d19dd | 468 | { |
3ee86942 MV |
469 | validate_substring_args (str, start, end); |
470 | return scm_i_substring_copy (str, start, end); | |
471 | } | |
472 | ||
3ee86942 MV |
473 | SCM |
474 | scm_c_substring_shared (SCM str, size_t start, size_t end) | |
475 | { | |
476 | validate_substring_args (str, start, end); | |
477 | return scm_i_substring_shared (str, start, end); | |
478 | } | |
0f2d19dd | 479 | |
d6c74168 | 480 | \f |
3ee86942 MV |
481 | /* Internal accessors |
482 | */ | |
483 | ||
50b1996f MG |
484 | /* Returns the number of characters in STR. This may be different |
485 | than the memory size of the string storage. */ | |
3ee86942 MV |
486 | size_t |
487 | scm_i_string_length (SCM str) | |
0f2d19dd | 488 | { |
3ee86942 | 489 | return STRING_LENGTH (str); |
0f2d19dd JB |
490 | } |
491 | ||
50b1996f MG |
492 | /* True if the string is 'narrow', meaning it has a 8-bit Latin-1 |
493 | encoding. False if it is 'wide', having a 32-bit UCS-4 | |
494 | encoding. */ | |
9c44cd45 MG |
495 | int |
496 | scm_i_is_narrow_string (SCM str) | |
497 | { | |
49d09292 MW |
498 | if (IS_SH_STRING (str)) |
499 | str = SH_STRING_STRING (str); | |
500 | ||
9c44cd45 MG |
501 | return !STRINGBUF_WIDE (STRING_STRINGBUF (str)); |
502 | } | |
503 | ||
587a3355 MG |
504 | /* Try to coerce a string to be narrow. It if is narrow already, do |
505 | nothing. If it is wide, shrink it to narrow if none of its | |
506 | characters are above 0xFF. Return true if the string is narrow or | |
507 | was made to be narrow. */ | |
508 | int | |
509 | scm_i_try_narrow_string (SCM str) | |
510 | { | |
49d09292 MW |
511 | if (IS_SH_STRING (str)) |
512 | str = SH_STRING_STRING (str); | |
513 | ||
ba54a202 | 514 | SET_STRING_STRINGBUF (str, narrow_stringbuf (STRING_STRINGBUF (str))); |
587a3355 MG |
515 | |
516 | return scm_i_is_narrow_string (str); | |
517 | } | |
518 | ||
100e20c7 LC |
519 | /* Return a pointer to the raw data of the string, which can be either Latin-1 |
520 | or UCS-4 encoded data, depending on `scm_i_is_narrow_string (STR)'. */ | |
521 | const void * | |
522 | scm_i_string_data (SCM str) | |
523 | { | |
524 | SCM buf; | |
525 | size_t start; | |
526 | const char *data; | |
527 | ||
528 | get_str_buf_start (&str, &buf, &start); | |
529 | ||
530 | data = STRINGBUF_CONTENTS (buf); | |
531 | data += start * (scm_i_is_narrow_string (str) ? 1 : 4); | |
532 | ||
533 | return data; | |
534 | } | |
535 | ||
50b1996f MG |
536 | /* Returns a pointer to the 8-bit Latin-1 encoded character array of |
537 | STR. */ | |
3ee86942 MV |
538 | const char * |
539 | scm_i_string_chars (SCM str) | |
540 | { | |
541 | SCM buf; | |
e1b29f6a MV |
542 | size_t start; |
543 | get_str_buf_start (&str, &buf, &start); | |
9c44cd45 | 544 | if (scm_i_is_narrow_string (str)) |
f59cf998 | 545 | return (const char *) STRINGBUF_CHARS (buf) + start; |
9c44cd45 MG |
546 | else |
547 | scm_misc_error (NULL, "Invalid read access of chars of wide string: ~s", | |
548 | scm_list_1 (str)); | |
549 | return NULL; | |
3ee86942 | 550 | } |
b00418df | 551 | |
50b1996f MG |
552 | /* Returns a pointer to the 32-bit UCS-4 encoded character array of |
553 | STR. */ | |
9c44cd45 MG |
554 | const scm_t_wchar * |
555 | scm_i_string_wide_chars (SCM str) | |
556 | { | |
557 | SCM buf; | |
558 | size_t start; | |
559 | ||
560 | get_str_buf_start (&str, &buf, &start); | |
561 | if (!scm_i_is_narrow_string (str)) | |
f59cf998 | 562 | return (const scm_t_wchar *) STRINGBUF_WIDE_CHARS (buf) + start; |
9c44cd45 MG |
563 | else |
564 | scm_misc_error (NULL, "Invalid read access of chars of narrow string: ~s", | |
565 | scm_list_1 (str)); | |
566 | } | |
567 | ||
568 | /* If the buffer in ORIG_STR is shared, copy ORIG_STR's characters to | |
569 | a new string buffer, so that it can be modified without modifying | |
50b1996f MG |
570 | other strings. Also, lock the string mutex. Later, one must call |
571 | scm_i_string_stop_writing to unlock the mutex. */ | |
9c44cd45 MG |
572 | SCM |
573 | scm_i_string_start_writing (SCM orig_str) | |
b00418df | 574 | { |
ed35de72 | 575 | SCM buf, str = orig_str; |
e1b29f6a | 576 | size_t start; |
ed35de72 | 577 | |
e1b29f6a | 578 | get_str_buf_start (&str, &buf, &start); |
ed35de72 MV |
579 | if (IS_RO_STRING (str)) |
580 | scm_misc_error (NULL, "string is read-only: ~s", scm_list_1 (orig_str)); | |
581 | ||
9de87eea | 582 | scm_i_pthread_mutex_lock (&stringbuf_write_mutex); |
3ee86942 MV |
583 | if (STRINGBUF_SHARED (buf)) |
584 | { | |
9c44cd45 | 585 | /* Clone the stringbuf. */ |
3ee86942 MV |
586 | size_t len = STRING_LENGTH (str); |
587 | SCM new_buf; | |
588 | ||
9de87eea | 589 | scm_i_pthread_mutex_unlock (&stringbuf_write_mutex); |
3ee86942 | 590 | |
9c44cd45 MG |
591 | if (scm_i_is_narrow_string (str)) |
592 | { | |
593 | new_buf = make_stringbuf (len); | |
594 | memcpy (STRINGBUF_CHARS (new_buf), | |
595 | STRINGBUF_CHARS (buf) + STRING_START (str), len); | |
596 | ||
597 | } | |
598 | else | |
599 | { | |
600 | new_buf = make_wide_stringbuf (len); | |
601 | u32_cpy ((scm_t_uint32 *) STRINGBUF_WIDE_CHARS (new_buf), | |
602 | (scm_t_uint32 *) (STRINGBUF_WIDE_CHARS (buf) | |
603 | + STRING_START (str)), len); | |
604 | } | |
3ee86942 | 605 | |
3ee86942 MV |
606 | SET_STRING_STRINGBUF (str, new_buf); |
607 | start -= STRING_START (str); | |
902578f1 LC |
608 | |
609 | /* FIXME: The following operations are not atomic, so other threads | |
610 | looking at STR may see an inconsistent state. Nevertheless it can't | |
611 | hurt much since (i) accessing STR while it is being mutated can't | |
612 | yield a crash, and (ii) concurrent accesses to STR should be | |
613 | protected by a mutex at the application level. The latter may not | |
614 | apply when STR != ORIG_STR, though. */ | |
3ee86942 | 615 | SET_STRING_START (str, 0); |
902578f1 | 616 | SET_STRING_STRINGBUF (str, new_buf); |
3ee86942 MV |
617 | |
618 | buf = new_buf; | |
619 | ||
9de87eea | 620 | scm_i_pthread_mutex_lock (&stringbuf_write_mutex); |
3ee86942 | 621 | } |
9c44cd45 MG |
622 | return orig_str; |
623 | } | |
3ee86942 | 624 | |
50b1996f | 625 | /* Return a pointer to the 8-bit Latin-1 chars of a string. */ |
9c44cd45 MG |
626 | char * |
627 | scm_i_string_writable_chars (SCM str) | |
628 | { | |
629 | SCM buf; | |
630 | size_t start; | |
3ee86942 | 631 | |
9c44cd45 MG |
632 | get_str_buf_start (&str, &buf, &start); |
633 | if (scm_i_is_narrow_string (str)) | |
f59cf998 | 634 | return (char *) STRINGBUF_CHARS (buf) + start; |
9c44cd45 MG |
635 | else |
636 | scm_misc_error (NULL, "Invalid write access of chars of wide string: ~s", | |
637 | scm_list_1 (str)); | |
638 | return NULL; | |
b00418df DH |
639 | } |
640 | ||
50b1996f | 641 | /* Return a pointer to the UCS-4 codepoints of a string. */ |
9c44cd45 MG |
642 | static scm_t_wchar * |
643 | scm_i_string_writable_wide_chars (SCM str) | |
644 | { | |
645 | SCM buf; | |
646 | size_t start; | |
647 | ||
648 | get_str_buf_start (&str, &buf, &start); | |
649 | if (!scm_i_is_narrow_string (str)) | |
650 | return STRINGBUF_WIDE_CHARS (buf) + start; | |
651 | else | |
1c7b216f | 652 | scm_misc_error (NULL, "Invalid write access of chars of narrow string: ~s", |
9c44cd45 | 653 | scm_list_1 (str)); |
b00418df DH |
654 | } |
655 | ||
50b1996f MG |
656 | /* Unlock the string mutex that was locked when |
657 | scm_i_string_start_writing was called. */ | |
3ee86942 MV |
658 | void |
659 | scm_i_string_stop_writing (void) | |
660 | { | |
9de87eea | 661 | scm_i_pthread_mutex_unlock (&stringbuf_write_mutex); |
3ee86942 | 662 | } |
b00418df | 663 | |
50b1996f | 664 | /* Return the Xth character of STR as a UCS-4 codepoint. */ |
9c44cd45 MG |
665 | scm_t_wchar |
666 | scm_i_string_ref (SCM str, size_t x) | |
667 | { | |
668 | if (scm_i_is_narrow_string (str)) | |
669 | return (scm_t_wchar) (unsigned char) (scm_i_string_chars (str)[x]); | |
670 | else | |
671 | return scm_i_string_wide_chars (str)[x]; | |
672 | } | |
673 | ||
889975e5 MG |
674 | /* Returns index+1 of the first char in STR that matches C, or |
675 | 0 if the char is not found. */ | |
676 | int | |
677 | scm_i_string_contains_char (SCM str, char ch) | |
678 | { | |
679 | size_t i; | |
680 | size_t len = scm_i_string_length (str); | |
681 | ||
682 | i = 0; | |
683 | if (scm_i_is_narrow_string (str)) | |
684 | { | |
685 | while (i < len) | |
686 | { | |
687 | if (scm_i_string_chars (str)[i] == ch) | |
688 | return i+1; | |
689 | i++; | |
690 | } | |
691 | } | |
692 | else | |
693 | { | |
694 | while (i < len) | |
695 | { | |
696 | if (scm_i_string_wide_chars (str)[i] | |
697 | == (unsigned char) ch) | |
698 | return i+1; | |
699 | i++; | |
700 | } | |
701 | } | |
702 | return 0; | |
703 | } | |
704 | ||
3f47e526 MG |
705 | int |
706 | scm_i_string_strcmp (SCM sstr, size_t start_x, const char *cstr) | |
707 | { | |
708 | if (scm_i_is_narrow_string (sstr)) | |
709 | { | |
710 | const char *a = scm_i_string_chars (sstr) + start_x; | |
711 | const char *b = cstr; | |
712 | return strncmp (a, b, strlen(b)); | |
713 | } | |
714 | else | |
715 | { | |
716 | size_t i; | |
717 | const scm_t_wchar *a = scm_i_string_wide_chars (sstr) + start_x; | |
718 | const char *b = cstr; | |
719 | for (i = 0; i < strlen (b); i++) | |
720 | { | |
721 | if (a[i] != (unsigned char) b[i]) | |
722 | return 1; | |
723 | } | |
724 | } | |
725 | return 0; | |
726 | } | |
727 | ||
50b1996f | 728 | /* Set the Pth character of STR to UCS-4 codepoint CHR. */ |
9c44cd45 MG |
729 | void |
730 | scm_i_string_set_x (SCM str, size_t p, scm_t_wchar chr) | |
731 | { | |
49d09292 MW |
732 | if (IS_SH_STRING (str)) |
733 | { | |
734 | p += STRING_START (str); | |
735 | str = SH_STRING_STRING (str); | |
736 | } | |
737 | ||
9c44cd45 | 738 | if (chr > 0xFF && scm_i_is_narrow_string (str)) |
ba54a202 | 739 | SET_STRING_STRINGBUF (str, wide_stringbuf (STRING_STRINGBUF (str))); |
9c44cd45 MG |
740 | |
741 | if (scm_i_is_narrow_string (str)) | |
742 | { | |
743 | char *dst = scm_i_string_writable_chars (str); | |
587a3355 | 744 | dst[p] = chr; |
9c44cd45 MG |
745 | } |
746 | else | |
747 | { | |
748 | scm_t_wchar *dst = scm_i_string_writable_wide_chars (str); | |
749 | dst[p] = chr; | |
750 | } | |
751 | } | |
752 | ||
ba54a202 | 753 | \f |
3ee86942 | 754 | /* Symbols. |
587a3355 | 755 | |
3ee86942 MV |
756 | Basic symbol creation and accessing is done here, the rest is in |
757 | symbols.[hc]. This has been done to keep stringbufs and the | |
758 | internals of strings and string-like objects confined to this file. | |
759 | */ | |
760 | ||
761 | #define SYMBOL_STRINGBUF SCM_CELL_OBJECT_1 | |
762 | ||
763 | SCM | |
6869328b MV |
764 | scm_i_make_symbol (SCM name, scm_t_bits flags, |
765 | unsigned long hash, SCM props) | |
3ee86942 MV |
766 | { |
767 | SCM buf; | |
768 | size_t start = STRING_START (name); | |
769 | size_t length = STRING_LENGTH (name); | |
770 | ||
771 | if (IS_SH_STRING (name)) | |
772 | { | |
773 | name = SH_STRING_STRING (name); | |
774 | start += STRING_START (name); | |
775 | } | |
1a4d7653 | 776 | buf = STRING_STRINGBUF (name); |
3ee86942 MV |
777 | |
778 | if (start == 0 && length == STRINGBUF_LENGTH (buf)) | |
779 | { | |
780 | /* reuse buf. */ | |
9de87eea | 781 | scm_i_pthread_mutex_lock (&stringbuf_write_mutex); |
3ee86942 | 782 | SET_STRINGBUF_SHARED (buf); |
9de87eea | 783 | scm_i_pthread_mutex_unlock (&stringbuf_write_mutex); |
3ee86942 MV |
784 | } |
785 | else | |
786 | { | |
787 | /* make new buf. */ | |
9c44cd45 MG |
788 | if (scm_i_is_narrow_string (name)) |
789 | { | |
790 | SCM new_buf = make_stringbuf (length); | |
791 | memcpy (STRINGBUF_CHARS (new_buf), | |
792 | STRINGBUF_CHARS (buf) + start, length); | |
793 | buf = new_buf; | |
794 | } | |
795 | else | |
796 | { | |
797 | SCM new_buf = make_wide_stringbuf (length); | |
798 | u32_cpy ((scm_t_uint32 *) STRINGBUF_WIDE_CHARS (new_buf), | |
799 | (scm_t_uint32 *) STRINGBUF_WIDE_CHARS (buf) + start, | |
800 | length); | |
801 | buf = new_buf; | |
802 | } | |
3ee86942 | 803 | } |
6869328b | 804 | return scm_double_cell (scm_tc7_symbol | flags, SCM_UNPACK (buf), |
3ee86942 MV |
805 | (scm_t_bits) hash, SCM_UNPACK (props)); |
806 | } | |
807 | ||
fd0a5bbc HWN |
808 | SCM |
809 | scm_i_c_make_symbol (const char *name, size_t len, | |
810 | scm_t_bits flags, unsigned long hash, SCM props) | |
811 | { | |
812 | SCM buf = make_stringbuf (len); | |
813 | memcpy (STRINGBUF_CHARS (buf), name, len); | |
814 | ||
65619ebe AW |
815 | return scm_double_cell (scm_tc7_symbol | flags, SCM_UNPACK (buf), |
816 | (scm_t_bits) hash, SCM_UNPACK (props)); | |
fd0a5bbc HWN |
817 | } |
818 | ||
50b1996f MG |
819 | /* Returns the number of characters in SYM. This may be different |
820 | from the memory size of SYM. */ | |
3ee86942 MV |
821 | size_t |
822 | scm_i_symbol_length (SCM sym) | |
0f2d19dd | 823 | { |
3ee86942 | 824 | return STRINGBUF_LENGTH (SYMBOL_STRINGBUF (sym)); |
0f2d19dd JB |
825 | } |
826 | ||
071bb6a8 LC |
827 | size_t |
828 | scm_c_symbol_length (SCM sym) | |
829 | #define FUNC_NAME "scm_c_symbol_length" | |
830 | { | |
831 | SCM_VALIDATE_SYMBOL (1, sym); | |
832 | ||
833 | return STRINGBUF_LENGTH (SYMBOL_STRINGBUF (sym)); | |
834 | } | |
835 | #undef FUNC_NAME | |
836 | ||
50b1996f MG |
837 | /* True if the name of SYM is stored as a Latin-1 encoded string. |
838 | False if it is stored as a 32-bit UCS-4-encoded string. */ | |
9c44cd45 MG |
839 | int |
840 | scm_i_is_narrow_symbol (SCM sym) | |
841 | { | |
842 | SCM buf; | |
843 | ||
844 | buf = SYMBOL_STRINGBUF (sym); | |
845 | return !STRINGBUF_WIDE (buf); | |
846 | } | |
847 | ||
50b1996f MG |
848 | /* Returns a pointer to the 8-bit Latin-1 encoded character array that |
849 | contains the name of SYM. */ | |
3ee86942 MV |
850 | const char * |
851 | scm_i_symbol_chars (SCM sym) | |
852 | { | |
9c44cd45 MG |
853 | SCM buf; |
854 | ||
855 | buf = SYMBOL_STRINGBUF (sym); | |
856 | if (!STRINGBUF_WIDE (buf)) | |
f59cf998 | 857 | return (const char *) STRINGBUF_CHARS (buf); |
9c44cd45 MG |
858 | else |
859 | scm_misc_error (NULL, "Invalid access of chars of a wide symbol ~S", | |
860 | scm_list_1 (sym)); | |
861 | } | |
862 | ||
50b1996f MG |
863 | /* Return a pointer to the 32-bit UCS-4-encoded character array of a |
864 | symbol's name. */ | |
9c44cd45 MG |
865 | const scm_t_wchar * |
866 | scm_i_symbol_wide_chars (SCM sym) | |
867 | { | |
868 | SCM buf; | |
869 | ||
870 | buf = SYMBOL_STRINGBUF (sym); | |
871 | if (STRINGBUF_WIDE (buf)) | |
f59cf998 | 872 | return (const scm_t_wchar *) STRINGBUF_WIDE_CHARS (buf); |
9c44cd45 MG |
873 | else |
874 | scm_misc_error (NULL, "Invalid access of chars of a narrow symbol ~S", | |
875 | scm_list_1 (sym)); | |
3ee86942 | 876 | } |
1cc91f1b | 877 | |
be54b15d | 878 | SCM |
3ee86942 | 879 | scm_i_symbol_substring (SCM sym, size_t start, size_t end) |
be54b15d | 880 | { |
3ee86942 | 881 | SCM buf = SYMBOL_STRINGBUF (sym); |
9de87eea | 882 | scm_i_pthread_mutex_lock (&stringbuf_write_mutex); |
3ee86942 | 883 | SET_STRINGBUF_SHARED (buf); |
9de87eea | 884 | scm_i_pthread_mutex_unlock (&stringbuf_write_mutex); |
fd2b17b9 | 885 | return scm_double_cell (RO_STRING_TAG, SCM_UNPACK (buf), |
3ee86942 MV |
886 | (scm_t_bits)start, (scm_t_bits) end - start); |
887 | } | |
be54b15d | 888 | |
50b1996f | 889 | /* Returns the Xth character of symbol SYM as a UCS-4 codepoint. */ |
9c44cd45 MG |
890 | scm_t_wchar |
891 | scm_i_symbol_ref (SCM sym, size_t x) | |
892 | { | |
893 | if (scm_i_is_narrow_symbol (sym)) | |
894 | return (scm_t_wchar) (unsigned char) (scm_i_symbol_chars (sym)[x]); | |
895 | else | |
896 | return scm_i_symbol_wide_chars (sym)[x]; | |
897 | } | |
898 | ||
3ee86942 MV |
899 | /* Debugging |
900 | */ | |
be54b15d | 901 | |
6ce6923b MG |
902 | SCM_DEFINE (scm_sys_string_dump, "%string-dump", 1, 0, 0, (SCM str), |
903 | "Returns an association list containing debugging information\n" | |
904 | "for @var{str}. The association list has the following entries." | |
905 | "@table @code\n" | |
906 | "@item string\n" | |
907 | "The string itself.\n" | |
908 | "@item start\n" | |
909 | "The start index of the string into its stringbuf\n" | |
910 | "@item length\n" | |
911 | "The length of the string\n" | |
912 | "@item shared\n" | |
913 | "If this string is a substring, it returns its parent string.\n" | |
914 | "Otherwise, it returns @code{#f}\n" | |
88ed5759 MG |
915 | "@item read-only\n" |
916 | "@code{#t} if the string is read-only\n" | |
6ce6923b MG |
917 | "@item stringbuf-chars\n" |
918 | "A new string containing this string's stringbuf's characters\n" | |
919 | "@item stringbuf-length\n" | |
920 | "The number of characters in this stringbuf\n" | |
921 | "@item stringbuf-shared\n" | |
922 | "@code{#t} if this stringbuf is shared\n" | |
6ce6923b MG |
923 | "@item stringbuf-wide\n" |
924 | "@code{#t} if this stringbuf's characters are stored in a\n" | |
925 | "32-bit buffer, or @code{#f} if they are stored in an 8-bit\n" | |
926 | "buffer\n" | |
927 | "@end table") | |
3ee86942 MV |
928 | #define FUNC_NAME s_scm_sys_string_dump |
929 | { | |
ba54a202 | 930 | SCM e1, e2, e3, e4, e5, e6, e7, e8, e9; |
6ce6923b | 931 | SCM buf; |
3ee86942 | 932 | SCM_VALIDATE_STRING (1, str); |
6ce6923b MG |
933 | |
934 | /* String info */ | |
4a655e50 | 935 | e1 = scm_cons (scm_from_latin1_symbol ("string"), |
6ce6923b | 936 | str); |
4a655e50 | 937 | e2 = scm_cons (scm_from_latin1_symbol ("start"), |
6ce6923b | 938 | scm_from_size_t (STRING_START (str))); |
4a655e50 | 939 | e3 = scm_cons (scm_from_latin1_symbol ("length"), |
6ce6923b MG |
940 | scm_from_size_t (STRING_LENGTH (str))); |
941 | ||
3ee86942 MV |
942 | if (IS_SH_STRING (str)) |
943 | { | |
4a655e50 | 944 | e4 = scm_cons (scm_from_latin1_symbol ("shared"), |
6ce6923b MG |
945 | SH_STRING_STRING (str)); |
946 | buf = STRING_STRINGBUF (SH_STRING_STRING (str)); | |
3ee86942 MV |
947 | } |
948 | else | |
949 | { | |
4a655e50 | 950 | e4 = scm_cons (scm_from_latin1_symbol ("shared"), |
6ce6923b MG |
951 | SCM_BOOL_F); |
952 | buf = STRING_STRINGBUF (str); | |
3ee86942 | 953 | } |
9c44cd45 | 954 | |
88ed5759 | 955 | if (IS_RO_STRING (str)) |
4a655e50 | 956 | e5 = scm_cons (scm_from_latin1_symbol ("read-only"), |
88ed5759 MG |
957 | SCM_BOOL_T); |
958 | else | |
4a655e50 | 959 | e5 = scm_cons (scm_from_latin1_symbol ("read-only"), |
88ed5759 | 960 | SCM_BOOL_F); |
587a3355 | 961 | |
6ce6923b | 962 | /* Stringbuf info */ |
6ce6923b MG |
963 | if (!STRINGBUF_WIDE (buf)) |
964 | { | |
965 | size_t len = STRINGBUF_LENGTH (buf); | |
966 | char *cbuf; | |
190d4b0d | 967 | SCM sbc = scm_i_make_string (len, &cbuf, 0); |
6ce6923b | 968 | memcpy (cbuf, STRINGBUF_CHARS (buf), len); |
4a655e50 | 969 | e6 = scm_cons (scm_from_latin1_symbol ("stringbuf-chars"), |
6ce6923b | 970 | sbc); |
3ee86942 | 971 | } |
6ce6923b MG |
972 | else |
973 | { | |
974 | size_t len = STRINGBUF_LENGTH (buf); | |
975 | scm_t_wchar *cbuf; | |
190d4b0d | 976 | SCM sbc = scm_i_make_wide_string (len, &cbuf, 0); |
6ce6923b MG |
977 | u32_cpy ((scm_t_uint32 *) cbuf, |
978 | (scm_t_uint32 *) STRINGBUF_WIDE_CHARS (buf), len); | |
4a655e50 | 979 | e6 = scm_cons (scm_from_latin1_symbol ("stringbuf-chars"), |
6ce6923b MG |
980 | sbc); |
981 | } | |
4a655e50 | 982 | e7 = scm_cons (scm_from_latin1_symbol ("stringbuf-length"), |
6ce6923b MG |
983 | scm_from_size_t (STRINGBUF_LENGTH (buf))); |
984 | if (STRINGBUF_SHARED (buf)) | |
4a655e50 | 985 | e8 = scm_cons (scm_from_latin1_symbol ("stringbuf-shared"), |
6ce6923b MG |
986 | SCM_BOOL_T); |
987 | else | |
4a655e50 | 988 | e8 = scm_cons (scm_from_latin1_symbol ("stringbuf-shared"), |
6ce6923b | 989 | SCM_BOOL_F); |
6ce6923b | 990 | if (STRINGBUF_WIDE (buf)) |
4a655e50 | 991 | e9 = scm_cons (scm_from_latin1_symbol ("stringbuf-wide"), |
ba54a202 | 992 | SCM_BOOL_T); |
6ce6923b | 993 | else |
4a655e50 | 994 | e9 = scm_cons (scm_from_latin1_symbol ("stringbuf-wide"), |
ba54a202 | 995 | SCM_BOOL_F); |
6ce6923b | 996 | |
ba54a202 | 997 | return scm_list_n (e1, e2, e3, e4, e5, e6, e7, e8, e9, SCM_UNDEFINED); |
3ee86942 MV |
998 | } |
999 | #undef FUNC_NAME | |
1000 | ||
6ce6923b MG |
1001 | SCM_DEFINE (scm_sys_symbol_dump, "%symbol-dump", 1, 0, 0, (SCM sym), |
1002 | "Returns an association list containing debugging information\n" | |
1003 | "for @var{sym}. The association list has the following entries." | |
1004 | "@table @code\n" | |
1005 | "@item symbol\n" | |
1006 | "The symbol itself\n" | |
1007 | "@item hash\n" | |
1008 | "Its hash value\n" | |
88ed5759 MG |
1009 | "@item interned\n" |
1010 | "@code{#t} if it is an interned symbol\n" | |
6ce6923b MG |
1011 | "@item stringbuf-chars\n" |
1012 | "A new string containing this symbols's stringbuf's characters\n" | |
1013 | "@item stringbuf-length\n" | |
1014 | "The number of characters in this stringbuf\n" | |
1015 | "@item stringbuf-shared\n" | |
1016 | "@code{#t} if this stringbuf is shared\n" | |
6ce6923b MG |
1017 | "@item stringbuf-wide\n" |
1018 | "@code{#t} if this stringbuf's characters are stored in a\n" | |
1019 | "32-bit buffer, or @code{#f} if they are stored in an 8-bit\n" | |
1020 | "buffer\n" | |
1021 | "@end table") | |
3ee86942 MV |
1022 | #define FUNC_NAME s_scm_sys_symbol_dump |
1023 | { | |
ba54a202 | 1024 | SCM e1, e2, e3, e4, e5, e6, e7; |
6ce6923b | 1025 | SCM buf; |
3ee86942 | 1026 | SCM_VALIDATE_SYMBOL (1, sym); |
4a655e50 | 1027 | e1 = scm_cons (scm_from_latin1_symbol ("symbol"), |
6ce6923b | 1028 | sym); |
4a655e50 | 1029 | e2 = scm_cons (scm_from_latin1_symbol ("hash"), |
6ce6923b | 1030 | scm_from_ulong (scm_i_symbol_hash (sym))); |
4a655e50 | 1031 | e3 = scm_cons (scm_from_latin1_symbol ("interned"), |
88ed5759 | 1032 | scm_symbol_interned_p (sym)); |
6ce6923b MG |
1033 | buf = SYMBOL_STRINGBUF (sym); |
1034 | ||
1035 | /* Stringbuf info */ | |
6ce6923b MG |
1036 | if (!STRINGBUF_WIDE (buf)) |
1037 | { | |
1038 | size_t len = STRINGBUF_LENGTH (buf); | |
1039 | char *cbuf; | |
190d4b0d | 1040 | SCM sbc = scm_i_make_string (len, &cbuf, 0); |
6ce6923b | 1041 | memcpy (cbuf, STRINGBUF_CHARS (buf), len); |
4a655e50 | 1042 | e4 = scm_cons (scm_from_latin1_symbol ("stringbuf-chars"), |
6ce6923b MG |
1043 | sbc); |
1044 | } | |
9c44cd45 | 1045 | else |
6ce6923b MG |
1046 | { |
1047 | size_t len = STRINGBUF_LENGTH (buf); | |
1048 | scm_t_wchar *cbuf; | |
190d4b0d | 1049 | SCM sbc = scm_i_make_wide_string (len, &cbuf, 0); |
6ce6923b MG |
1050 | u32_cpy ((scm_t_uint32 *) cbuf, |
1051 | (scm_t_uint32 *) STRINGBUF_WIDE_CHARS (buf), len); | |
4a655e50 | 1052 | e4 = scm_cons (scm_from_latin1_symbol ("stringbuf-chars"), |
6ce6923b MG |
1053 | sbc); |
1054 | } | |
4a655e50 | 1055 | e5 = scm_cons (scm_from_latin1_symbol ("stringbuf-length"), |
6ce6923b MG |
1056 | scm_from_size_t (STRINGBUF_LENGTH (buf))); |
1057 | if (STRINGBUF_SHARED (buf)) | |
4a655e50 | 1058 | e6 = scm_cons (scm_from_latin1_symbol ("stringbuf-shared"), |
6ce6923b MG |
1059 | SCM_BOOL_T); |
1060 | else | |
4a655e50 | 1061 | e6 = scm_cons (scm_from_latin1_symbol ("stringbuf-shared"), |
6ce6923b | 1062 | SCM_BOOL_F); |
6ce6923b | 1063 | if (STRINGBUF_WIDE (buf)) |
4a655e50 | 1064 | e7 = scm_cons (scm_from_latin1_symbol ("stringbuf-wide"), |
6ce6923b MG |
1065 | SCM_BOOL_T); |
1066 | else | |
4a655e50 | 1067 | e7 = scm_cons (scm_from_latin1_symbol ("stringbuf-wide"), |
6ce6923b | 1068 | SCM_BOOL_F); |
ba54a202 | 1069 | return scm_list_n (e1, e2, e3, e4, e5, e6, e7, SCM_UNDEFINED); |
6ce6923b | 1070 | |
3ee86942 MV |
1071 | } |
1072 | #undef FUNC_NAME | |
1073 | ||
56a3dcd4 | 1074 | #ifdef SCM_STRING_LENGTH_HISTOGRAM |
6ce6923b | 1075 | |
9c44cd45 | 1076 | SCM_DEFINE (scm_sys_stringbuf_hist, "%stringbuf-hist", 0, 0, 0, (void), "") |
e1b29f6a | 1077 | #define FUNC_NAME s_scm_sys_stringbuf_hist |
3ee86942 MV |
1078 | { |
1079 | int i; | |
1080 | for (i = 0; i < 1000; i++) | |
1081 | if (lenhist[i]) | |
1082 | fprintf (stderr, " %3d: %u\n", i, lenhist[i]); | |
1083 | fprintf (stderr, ">999: %u\n", lenhist[1000]); | |
1084 | return SCM_UNSPECIFIED; | |
be54b15d DH |
1085 | } |
1086 | #undef FUNC_NAME | |
1087 | ||
3ee86942 MV |
1088 | #endif |
1089 | ||
1090 | \f | |
1091 | ||
1092 | SCM_DEFINE (scm_string_p, "string?", 1, 0, 0, | |
1093 | (SCM obj), | |
1094 | "Return @code{#t} if @var{obj} is a string, else @code{#f}.") | |
1095 | #define FUNC_NAME s_scm_string_p | |
1096 | { | |
1097 | return scm_from_bool (IS_STRING (obj)); | |
1098 | } | |
1099 | #undef FUNC_NAME | |
1100 | ||
1101 | ||
1102 | SCM_REGISTER_PROC (s_scm_list_to_string, "list->string", 1, 0, 0, scm_string); | |
1103 | ||
1104 | SCM_DEFINE (scm_string, "string", 0, 0, 1, | |
1105 | (SCM chrs), | |
1106 | "@deffnx {Scheme Procedure} list->string chrs\n" | |
1107 | "Return a newly allocated string composed of the arguments,\n" | |
1108 | "@var{chrs}.") | |
1109 | #define FUNC_NAME s_scm_string | |
1110 | { | |
9aa27c1a | 1111 | SCM result = SCM_BOOL_F; |
9c44cd45 | 1112 | SCM rest; |
3ee86942 | 1113 | size_t len; |
9c44cd45 MG |
1114 | size_t p = 0; |
1115 | long i; | |
9aa27c1a | 1116 | int wide = 0; |
3ee86942 | 1117 | |
9c44cd45 MG |
1118 | /* Verify that this is a list of chars. */ |
1119 | i = scm_ilength (chrs); | |
3c7cf7f5 | 1120 | SCM_ASSERT (i >= 0, chrs, SCM_ARG1, FUNC_NAME); |
3ee86942 | 1121 | |
9c44cd45 MG |
1122 | len = (size_t) i; |
1123 | rest = chrs; | |
3ee86942 | 1124 | |
9c44cd45 | 1125 | while (len > 0 && scm_is_pair (rest)) |
3ee86942 | 1126 | { |
9c44cd45 | 1127 | SCM elt = SCM_CAR (rest); |
3ee86942 | 1128 | SCM_VALIDATE_CHAR (SCM_ARGn, elt); |
9aa27c1a MG |
1129 | if (SCM_CHAR (elt) > 0xFF) |
1130 | wide = 1; | |
9c44cd45 MG |
1131 | rest = SCM_CDR (rest); |
1132 | len--; | |
1133 | scm_remember_upto_here_1 (elt); | |
1134 | } | |
1135 | ||
1136 | /* Construct a string containing this list of chars. */ | |
1137 | len = (size_t) i; | |
1138 | rest = chrs; | |
1139 | ||
9aa27c1a | 1140 | if (wide == 0) |
9c44cd45 | 1141 | { |
56a3dcd4 LC |
1142 | char *buf; |
1143 | ||
190d4b0d | 1144 | result = scm_i_make_string (len, NULL, 0); |
9aa27c1a | 1145 | result = scm_i_string_start_writing (result); |
56a3dcd4 | 1146 | buf = scm_i_string_writable_chars (result); |
9aa27c1a MG |
1147 | while (len > 0 && scm_is_pair (rest)) |
1148 | { | |
1149 | SCM elt = SCM_CAR (rest); | |
1150 | buf[p] = (unsigned char) SCM_CHAR (elt); | |
1151 | p++; | |
1152 | rest = SCM_CDR (rest); | |
1153 | len--; | |
1154 | scm_remember_upto_here_1 (elt); | |
1155 | } | |
1156 | } | |
1157 | else | |
1158 | { | |
56a3dcd4 LC |
1159 | scm_t_wchar *buf; |
1160 | ||
190d4b0d | 1161 | result = scm_i_make_wide_string (len, NULL, 0); |
9aa27c1a | 1162 | result = scm_i_string_start_writing (result); |
56a3dcd4 | 1163 | buf = scm_i_string_writable_wide_chars (result); |
9aa27c1a MG |
1164 | while (len > 0 && scm_is_pair (rest)) |
1165 | { | |
1166 | SCM elt = SCM_CAR (rest); | |
1167 | buf[p] = SCM_CHAR (elt); | |
1168 | p++; | |
1169 | rest = SCM_CDR (rest); | |
1170 | len--; | |
1171 | scm_remember_upto_here_1 (elt); | |
1172 | } | |
3ee86942 | 1173 | } |
9c44cd45 MG |
1174 | scm_i_string_stop_writing (); |
1175 | ||
3ee86942 MV |
1176 | if (len > 0) |
1177 | scm_misc_error (NULL, "list changed while constructing string", SCM_EOL); | |
9c44cd45 | 1178 | if (!scm_is_null (rest)) |
3ee86942 MV |
1179 | scm_wrong_type_arg_msg (NULL, 0, chrs, "proper list"); |
1180 | ||
1181 | return result; | |
1182 | } | |
1183 | #undef FUNC_NAME | |
be54b15d | 1184 | |
3b3b36dd | 1185 | SCM_DEFINE (scm_make_string, "make-string", 1, 1, 0, |
6fa73e72 | 1186 | (SCM k, SCM chr), |
0d26a824 MG |
1187 | "Return a newly allocated string of\n" |
1188 | "length @var{k}. If @var{chr} is given, then all elements of\n" | |
1189 | "the string are initialized to @var{chr}, otherwise the contents\n" | |
b7e64f8b | 1190 | "of the string are all set to @code{#\nul}.") |
1bbd0b84 | 1191 | #define FUNC_NAME s_scm_make_string |
0f2d19dd | 1192 | { |
3ee86942 MV |
1193 | return scm_c_make_string (scm_to_size_t (k), chr); |
1194 | } | |
1195 | #undef FUNC_NAME | |
1196 | ||
1197 | SCM | |
1198 | scm_c_make_string (size_t len, SCM chr) | |
1199 | #define FUNC_NAME NULL | |
1200 | { | |
9c44cd45 | 1201 | size_t p; |
3ef6650d | 1202 | char *contents = NULL; |
190d4b0d | 1203 | SCM res = scm_i_make_string (len, &contents, 0); |
cb0d8be2 | 1204 | |
3ef6650d AW |
1205 | /* If no char is given, initialize string contents to NULL. */ |
1206 | if (SCM_UNBNDP (chr)) | |
1207 | memset (contents, 0, len); | |
1208 | else | |
e11e83f3 | 1209 | { |
3ee86942 | 1210 | SCM_VALIDATE_CHAR (0, chr); |
9c44cd45 MG |
1211 | res = scm_i_string_start_writing (res); |
1212 | for (p = 0; p < len; p++) | |
1213 | scm_i_string_set_x (res, p, SCM_CHAR (chr)); | |
1214 | scm_i_string_stop_writing (); | |
0f2d19dd | 1215 | } |
e11e83f3 MV |
1216 | |
1217 | return res; | |
0f2d19dd | 1218 | } |
1bbd0b84 | 1219 | #undef FUNC_NAME |
0f2d19dd | 1220 | |
3b3b36dd | 1221 | SCM_DEFINE (scm_string_length, "string-length", 1, 0, 0, |
0d26a824 MG |
1222 | (SCM string), |
1223 | "Return the number of characters in @var{string}.") | |
1bbd0b84 | 1224 | #define FUNC_NAME s_scm_string_length |
0f2d19dd | 1225 | { |
d1ca2c64 | 1226 | SCM_VALIDATE_STRING (1, string); |
3ee86942 | 1227 | return scm_from_size_t (STRING_LENGTH (string)); |
0f2d19dd | 1228 | } |
1bbd0b84 | 1229 | #undef FUNC_NAME |
0f2d19dd | 1230 | |
f8ba2bb9 | 1231 | SCM_DEFINE (scm_string_bytes_per_char, "string-bytes-per-char", 1, 0, 0, |
9c44cd45 MG |
1232 | (SCM string), |
1233 | "Return the bytes used to represent a character in @var{string}." | |
1234 | "This will return 1 or 4.") | |
f8ba2bb9 | 1235 | #define FUNC_NAME s_scm_string_bytes_per_char |
9c44cd45 MG |
1236 | { |
1237 | SCM_VALIDATE_STRING (1, string); | |
1238 | if (!scm_i_is_narrow_string (string)) | |
1239 | return scm_from_int (4); | |
1240 | ||
1241 | return scm_from_int (1); | |
1242 | } | |
1243 | #undef FUNC_NAME | |
1244 | ||
3ee86942 MV |
1245 | size_t |
1246 | scm_c_string_length (SCM string) | |
1247 | { | |
1248 | if (!IS_STRING (string)) | |
1249 | scm_wrong_type_arg_msg (NULL, 0, string, "string"); | |
1250 | return STRING_LENGTH (string); | |
1251 | } | |
1252 | ||
bd9e24b3 | 1253 | SCM_DEFINE (scm_string_ref, "string-ref", 2, 0, 0, |
6fa73e72 | 1254 | (SCM str, SCM k), |
9c44cd45 MG |
1255 | "Return character @var{k} of @var{str} using zero-origin\n" |
1256 | "indexing. @var{k} must be a valid index of @var{str}.") | |
1bbd0b84 | 1257 | #define FUNC_NAME s_scm_string_ref |
0f2d19dd | 1258 | { |
3ae3166b | 1259 | size_t len; |
a55c2b68 | 1260 | unsigned long idx; |
bd9e24b3 | 1261 | |
d1ca2c64 | 1262 | SCM_VALIDATE_STRING (1, str); |
3ae3166b LC |
1263 | |
1264 | len = scm_i_string_length (str); | |
1265 | if (SCM_LIKELY (len > 0)) | |
1266 | idx = scm_to_unsigned_integer (k, 0, len - 1); | |
1267 | else | |
1268 | scm_out_of_range (NULL, k); | |
1269 | ||
9c44cd45 MG |
1270 | if (scm_i_is_narrow_string (str)) |
1271 | return SCM_MAKE_CHAR (scm_i_string_chars (str)[idx]); | |
1272 | else | |
1273 | return SCM_MAKE_CHAR (scm_i_string_wide_chars (str)[idx]); | |
0f2d19dd | 1274 | } |
1bbd0b84 | 1275 | #undef FUNC_NAME |
0f2d19dd | 1276 | |
3ee86942 MV |
1277 | SCM |
1278 | scm_c_string_ref (SCM str, size_t p) | |
1279 | { | |
1280 | if (p >= scm_i_string_length (str)) | |
1281 | scm_out_of_range (NULL, scm_from_size_t (p)); | |
9c44cd45 MG |
1282 | if (scm_i_is_narrow_string (str)) |
1283 | return SCM_MAKE_CHAR (scm_i_string_chars (str)[p]); | |
1284 | else | |
1285 | return SCM_MAKE_CHAR (scm_i_string_wide_chars (str)[p]); | |
1286 | ||
3ee86942 | 1287 | } |
f0942910 | 1288 | |
3b3b36dd | 1289 | SCM_DEFINE (scm_string_set_x, "string-set!", 3, 0, 0, |
6fa73e72 | 1290 | (SCM str, SCM k, SCM chr), |
9c44cd45 MG |
1291 | "Store @var{chr} in element @var{k} of @var{str} and return\n" |
1292 | "an unspecified value. @var{k} must be a valid index of\n" | |
1293 | "@var{str}.") | |
1bbd0b84 | 1294 | #define FUNC_NAME s_scm_string_set_x |
0f2d19dd | 1295 | { |
3ae3166b | 1296 | size_t len; |
a55c2b68 MV |
1297 | unsigned long idx; |
1298 | ||
f0942910 | 1299 | SCM_VALIDATE_STRING (1, str); |
3ae3166b LC |
1300 | |
1301 | len = scm_i_string_length (str); | |
1302 | if (SCM_LIKELY (len > 0)) | |
1303 | idx = scm_to_unsigned_integer (k, 0, len - 1); | |
1304 | else | |
1305 | scm_out_of_range (NULL, k); | |
1306 | ||
34d19ef6 | 1307 | SCM_VALIDATE_CHAR (3, chr); |
9c44cd45 MG |
1308 | str = scm_i_string_start_writing (str); |
1309 | scm_i_string_set_x (str, idx, SCM_CHAR (chr)); | |
1310 | scm_i_string_stop_writing (); | |
1311 | ||
0f2d19dd JB |
1312 | return SCM_UNSPECIFIED; |
1313 | } | |
1bbd0b84 | 1314 | #undef FUNC_NAME |
0f2d19dd | 1315 | |
3ee86942 MV |
1316 | void |
1317 | scm_c_string_set_x (SCM str, size_t p, SCM chr) | |
1318 | { | |
1319 | if (p >= scm_i_string_length (str)) | |
1320 | scm_out_of_range (NULL, scm_from_size_t (p)); | |
9c44cd45 MG |
1321 | str = scm_i_string_start_writing (str); |
1322 | scm_i_string_set_x (str, p, SCM_CHAR (chr)); | |
1323 | scm_i_string_stop_writing (); | |
3ee86942 | 1324 | } |
0f2d19dd | 1325 | |
3b3b36dd | 1326 | SCM_DEFINE (scm_substring, "substring", 2, 1, 0, |
0d26a824 MG |
1327 | (SCM str, SCM start, SCM end), |
1328 | "Return a newly allocated string formed from the characters\n" | |
1329 | "of @var{str} beginning with index @var{start} (inclusive) and\n" | |
1330 | "ending with index @var{end} (exclusive).\n" | |
1331 | "@var{str} must be a string, @var{start} and @var{end} must be\n" | |
1332 | "exact integers satisfying:\n\n" | |
1333 | "0 <= @var{start} <= @var{end} <= (string-length @var{str}).") | |
1bbd0b84 | 1334 | #define FUNC_NAME s_scm_substring |
0f2d19dd | 1335 | { |
3ee86942 | 1336 | size_t len, from, to; |
685c0d71 | 1337 | |
d1ca2c64 | 1338 | SCM_VALIDATE_STRING (1, str); |
3ee86942 MV |
1339 | len = scm_i_string_length (str); |
1340 | from = scm_to_unsigned_integer (start, 0, len); | |
a55c2b68 | 1341 | if (SCM_UNBNDP (end)) |
3ee86942 | 1342 | to = len; |
a55c2b68 | 1343 | else |
3ee86942 MV |
1344 | to = scm_to_unsigned_integer (end, from, len); |
1345 | return scm_i_substring (str, from, to); | |
0f2d19dd | 1346 | } |
1bbd0b84 | 1347 | #undef FUNC_NAME |
0f2d19dd | 1348 | |
ed35de72 MV |
1349 | SCM_DEFINE (scm_substring_read_only, "substring/read-only", 2, 1, 0, |
1350 | (SCM str, SCM start, SCM end), | |
1351 | "Return a newly allocated string formed from the characters\n" | |
1352 | "of @var{str} beginning with index @var{start} (inclusive) and\n" | |
1353 | "ending with index @var{end} (exclusive).\n" | |
1354 | "@var{str} must be a string, @var{start} and @var{end} must be\n" | |
1355 | "exact integers satisfying:\n" | |
1356 | "\n" | |
1357 | "0 <= @var{start} <= @var{end} <= (string-length @var{str}).\n" | |
1358 | "\n" | |
1359 | "The returned string is read-only.\n") | |
1360 | #define FUNC_NAME s_scm_substring_read_only | |
1361 | { | |
1362 | size_t len, from, to; | |
1363 | ||
1364 | SCM_VALIDATE_STRING (1, str); | |
1365 | len = scm_i_string_length (str); | |
1366 | from = scm_to_unsigned_integer (start, 0, len); | |
1367 | if (SCM_UNBNDP (end)) | |
1368 | to = len; | |
1369 | else | |
1370 | to = scm_to_unsigned_integer (end, from, len); | |
1371 | return scm_i_substring_read_only (str, from, to); | |
1372 | } | |
1373 | #undef FUNC_NAME | |
1374 | ||
3ee86942 MV |
1375 | SCM_DEFINE (scm_substring_copy, "substring/copy", 2, 1, 0, |
1376 | (SCM str, SCM start, SCM end), | |
1377 | "Return a newly allocated string formed from the characters\n" | |
1378 | "of @var{str} beginning with index @var{start} (inclusive) and\n" | |
1379 | "ending with index @var{end} (exclusive).\n" | |
1380 | "@var{str} must be a string, @var{start} and @var{end} must be\n" | |
1381 | "exact integers satisfying:\n\n" | |
1382 | "0 <= @var{start} <= @var{end} <= (string-length @var{str}).") | |
1383 | #define FUNC_NAME s_scm_substring_copy | |
1384 | { | |
e1b29f6a MV |
1385 | /* For the Scheme version, START is mandatory, but for the C |
1386 | version, it is optional. See scm_string_copy in srfi-13.c for a | |
1387 | rationale. | |
1388 | */ | |
1389 | ||
1390 | size_t from, to; | |
3ee86942 MV |
1391 | |
1392 | SCM_VALIDATE_STRING (1, str); | |
e1b29f6a MV |
1393 | scm_i_get_substring_spec (scm_i_string_length (str), |
1394 | start, &from, end, &to); | |
3ee86942 MV |
1395 | return scm_i_substring_copy (str, from, to); |
1396 | } | |
1397 | #undef FUNC_NAME | |
1398 | ||
1399 | SCM_DEFINE (scm_substring_shared, "substring/shared", 2, 1, 0, | |
1400 | (SCM str, SCM start, SCM end), | |
1401 | "Return string that indirectly refers to the characters\n" | |
1402 | "of @var{str} beginning with index @var{start} (inclusive) and\n" | |
1403 | "ending with index @var{end} (exclusive).\n" | |
1404 | "@var{str} must be a string, @var{start} and @var{end} must be\n" | |
1405 | "exact integers satisfying:\n\n" | |
1406 | "0 <= @var{start} <= @var{end} <= (string-length @var{str}).") | |
1407 | #define FUNC_NAME s_scm_substring_shared | |
1408 | { | |
1409 | size_t len, from, to; | |
1410 | ||
1411 | SCM_VALIDATE_STRING (1, str); | |
1412 | len = scm_i_string_length (str); | |
1413 | from = scm_to_unsigned_integer (start, 0, len); | |
1414 | if (SCM_UNBNDP (end)) | |
1415 | to = len; | |
1416 | else | |
1417 | to = scm_to_unsigned_integer (end, from, len); | |
1418 | return scm_i_substring_shared (str, from, to); | |
1419 | } | |
1420 | #undef FUNC_NAME | |
685c0d71 | 1421 | |
3b3b36dd | 1422 | SCM_DEFINE (scm_string_append, "string-append", 0, 0, 1, |
6fa73e72 | 1423 | (SCM args), |
9c44cd45 | 1424 | "Return a newly allocated string whose characters form the\n" |
0d26a824 | 1425 | "concatenation of the given strings, @var{args}.") |
1bbd0b84 | 1426 | #define FUNC_NAME s_scm_string_append |
0f2d19dd JB |
1427 | { |
1428 | SCM res; | |
2f13a466 MW |
1429 | size_t total = 0; |
1430 | size_t len; | |
9c44cd45 | 1431 | int wide = 0; |
c829a427 | 1432 | SCM l, s; |
bd4911ef | 1433 | size_t i; |
9909c395 MG |
1434 | union |
1435 | { | |
1436 | char *narrow; | |
1437 | scm_t_wchar *wide; | |
1438 | } data; | |
af45e3b0 DH |
1439 | |
1440 | SCM_VALIDATE_REST_ARGUMENT (args); | |
9c44cd45 | 1441 | for (l = args; !scm_is_null (l); l = SCM_CDR (l)) |
c829a427 MV |
1442 | { |
1443 | s = SCM_CAR (l); | |
1444 | SCM_VALIDATE_STRING (SCM_ARGn, s); | |
2f13a466 MW |
1445 | len = scm_i_string_length (s); |
1446 | if (((size_t) -1) - total < len) | |
1447 | scm_num_overflow (s_scm_string_append); | |
1448 | total += len; | |
9c44cd45 MG |
1449 | if (!scm_i_is_narrow_string (s)) |
1450 | wide = 1; | |
c829a427 | 1451 | } |
9909c395 | 1452 | data.narrow = NULL; |
9c44cd45 | 1453 | if (!wide) |
2f13a466 | 1454 | res = scm_i_make_string (total, &data.narrow, 0); |
9c44cd45 | 1455 | else |
2f13a466 | 1456 | res = scm_i_make_wide_string (total, &data.wide, 0); |
9c44cd45 MG |
1457 | |
1458 | for (l = args; !scm_is_null (l); l = SCM_CDR (l)) | |
c829a427 | 1459 | { |
edea856c | 1460 | size_t len; |
c829a427 | 1461 | s = SCM_CAR (l); |
3ee86942 | 1462 | SCM_VALIDATE_STRING (SCM_ARGn, s); |
edea856c | 1463 | len = scm_i_string_length (s); |
2f13a466 MW |
1464 | if (len > total) |
1465 | SCM_MISC_ERROR ("list changed during string-append", SCM_EOL); | |
9c44cd45 MG |
1466 | if (!wide) |
1467 | { | |
9909c395 MG |
1468 | memcpy (data.narrow, scm_i_string_chars (s), len); |
1469 | data.narrow += len; | |
9c44cd45 MG |
1470 | } |
1471 | else | |
1472 | { | |
1473 | if (scm_i_is_narrow_string (s)) | |
1474 | { | |
2f13a466 MW |
1475 | const char *src = scm_i_string_chars (s); |
1476 | for (i = 0; i < len; i++) | |
1477 | data.wide[i] = (unsigned char) src[i]; | |
9c44cd45 MG |
1478 | } |
1479 | else | |
9909c395 | 1480 | u32_cpy ((scm_t_uint32 *) data.wide, |
9c44cd45 | 1481 | (scm_t_uint32 *) scm_i_string_wide_chars (s), len); |
9909c395 | 1482 | data.wide += len; |
9c44cd45 | 1483 | } |
2f13a466 | 1484 | total -= len; |
c829a427 MV |
1485 | scm_remember_upto_here_1 (s); |
1486 | } | |
2f13a466 MW |
1487 | if (total != 0) |
1488 | SCM_MISC_ERROR ("list changed during string-append", SCM_EOL); | |
0f2d19dd JB |
1489 | return res; |
1490 | } | |
1bbd0b84 | 1491 | #undef FUNC_NAME |
0f2d19dd | 1492 | |
24933780 | 1493 | |
a3d7d5d5 | 1494 | \f |
c62da8f8 | 1495 | /* Charset conversion error handling. */ |
a3d7d5d5 LC |
1496 | |
1497 | SCM_SYMBOL (scm_encoding_error_key, "encoding-error"); | |
c62da8f8 LC |
1498 | SCM_SYMBOL (scm_decoding_error_key, "decoding-error"); |
1499 | ||
6851d3be LC |
1500 | /* Raise an exception informing that character CHR could not be written |
1501 | to PORT in its current encoding. */ | |
d14418a5 | 1502 | void |
ef7e4ba3 | 1503 | scm_encoding_error (const char *subr, int err, const char *message, |
6851d3be | 1504 | SCM port, SCM chr) |
ef7e4ba3 | 1505 | { |
ef7e4ba3 | 1506 | scm_throw (scm_encoding_error_key, |
d050ef66 AW |
1507 | scm_list_n (scm_from_latin1_string (subr), |
1508 | scm_from_latin1_string (message), | |
ef7e4ba3 | 1509 | scm_from_int (err), |
6851d3be | 1510 | port, chr, |
ef7e4ba3 | 1511 | SCM_UNDEFINED)); |
a3d7d5d5 LC |
1512 | } |
1513 | ||
c62da8f8 LC |
1514 | /* Raise an exception informing of an encoding error on PORT. This |
1515 | means that a character could not be written in PORT's encoding. */ | |
1516 | void | |
1517 | scm_decoding_error (const char *subr, int err, const char *message, SCM port) | |
1518 | { | |
1519 | scm_throw (scm_decoding_error_key, | |
d050ef66 AW |
1520 | scm_list_n (scm_from_latin1_string (subr), |
1521 | scm_from_latin1_string (message), | |
c62da8f8 LC |
1522 | scm_from_int (err), |
1523 | port, | |
1524 | SCM_UNDEFINED)); | |
1525 | } | |
1526 | ||
1527 | \f | |
1528 | /* String conversion to/from C. */ | |
1529 | ||
41d1d984 AW |
1530 | static void |
1531 | decoding_error (const char *func_name, int errno_save, | |
1532 | const char *str, size_t len) | |
1533 | { | |
1534 | /* Raise an error and pass the raw C string as a bytevector to the `throw' | |
1535 | handler. */ | |
1536 | SCM bv; | |
1537 | signed char *buf; | |
1538 | ||
1539 | buf = scm_gc_malloc_pointerless (len, "bytevector"); | |
1540 | memcpy (buf, str, len); | |
1541 | bv = scm_c_take_gc_bytevector (buf, len, SCM_BOOL_F); | |
1542 | ||
1543 | scm_decoding_error (func_name, errno_save, | |
1544 | "input locale conversion error", bv); | |
1545 | } | |
1546 | ||
fac32b51 | 1547 | SCM |
587a3355 MG |
1548 | scm_from_stringn (const char *str, size_t len, const char *encoding, |
1549 | scm_t_string_failed_conversion_handler handler) | |
1550 | { | |
1551 | size_t u32len, i; | |
1552 | scm_t_wchar *u32; | |
1553 | int wide = 0; | |
1554 | SCM res; | |
1555 | ||
d40e1ca8 | 1556 | /* The order of these checks is important. */ |
a574564c | 1557 | if (!str && len != 0) |
d40e1ca8 AW |
1558 | scm_misc_error ("scm_from_stringn", "NULL string pointer", SCM_EOL); |
1559 | if (len == (size_t) -1) | |
1560 | len = strlen (str); | |
fac32b51 | 1561 | |
f6f4feb0 | 1562 | if (c_strcasecmp (encoding, "ISO-8859-1") == 0 || len == 0) |
098818a1 | 1563 | return scm_from_latin1_stringn (str, len); |
f6f4feb0 | 1564 | else if (c_strcasecmp (encoding, "UTF-8") == 0 |
8c76a897 | 1565 | && handler == SCM_FAILED_CONVERSION_ERROR) |
098818a1 | 1566 | return scm_from_utf8_stringn (str, len); |
889975e5 | 1567 | |
587a3355 MG |
1568 | u32len = 0; |
1569 | u32 = (scm_t_wchar *) u32_conv_from_encoding (encoding, | |
1570 | (enum iconv_ilseq_handler) | |
1571 | handler, | |
1572 | str, len, | |
1573 | NULL, | |
1574 | NULL, &u32len); | |
1575 | ||
ef7e4ba3 | 1576 | if (SCM_UNLIKELY (u32 == NULL)) |
41d1d984 | 1577 | decoding_error (__func__, errno, str, len); |
587a3355 MG |
1578 | |
1579 | i = 0; | |
1580 | while (i < u32len) | |
1581 | if (u32[i++] > 0xFF) | |
1582 | { | |
1583 | wide = 1; | |
1584 | break; | |
1585 | } | |
1586 | ||
1587 | if (!wide) | |
1588 | { | |
1589 | char *dst; | |
190d4b0d | 1590 | res = scm_i_make_string (u32len, &dst, 0); |
587a3355 MG |
1591 | for (i = 0; i < u32len; i ++) |
1592 | dst[i] = (unsigned char) u32[i]; | |
1593 | dst[u32len] = '\0'; | |
1594 | } | |
1595 | else | |
1596 | { | |
1597 | scm_t_wchar *wdst; | |
190d4b0d | 1598 | res = scm_i_make_wide_string (u32len, &wdst, 0); |
587a3355 MG |
1599 | u32_cpy ((scm_t_uint32 *) wdst, (scm_t_uint32 *) u32, u32len); |
1600 | wdst[u32len] = 0; | |
1601 | } | |
1602 | ||
1603 | free (u32); | |
1604 | return res; | |
1605 | } | |
1606 | ||
cf313a94 | 1607 | SCM |
d40e1ca8 | 1608 | scm_from_locale_string (const char *str) |
cf313a94 | 1609 | { |
d40e1ca8 | 1610 | return scm_from_locale_stringn (str, -1); |
cf313a94 MG |
1611 | } |
1612 | ||
c829a427 MV |
1613 | SCM |
1614 | scm_from_locale_stringn (const char *str, size_t len) | |
1615 | { | |
95f5e303 | 1616 | return scm_from_stringn (str, len, locale_charset (), |
b22e94db | 1617 | scm_i_default_port_conversion_handler ()); |
c829a427 | 1618 | } |
4d4528e7 | 1619 | |
c829a427 | 1620 | SCM |
d40e1ca8 | 1621 | scm_from_latin1_string (const char *str) |
4d4528e7 | 1622 | { |
d40e1ca8 AW |
1623 | return scm_from_latin1_stringn (str, -1); |
1624 | } | |
9c44cd45 | 1625 | |
d40e1ca8 AW |
1626 | SCM |
1627 | scm_from_latin1_stringn (const char *str, size_t len) | |
1628 | { | |
e9a35a96 LC |
1629 | char *buf; |
1630 | SCM result; | |
1631 | ||
1632 | if (len == (size_t) -1) | |
1633 | len = strlen (str); | |
1634 | ||
1635 | /* Make a narrow string and copy STR as is. */ | |
190d4b0d | 1636 | result = scm_i_make_string (len, &buf, 0); |
e9a35a96 LC |
1637 | memcpy (buf, str, len); |
1638 | ||
1639 | return result; | |
c829a427 | 1640 | } |
4d4528e7 | 1641 | |
587a3355 | 1642 | SCM |
d40e1ca8 | 1643 | scm_from_utf8_string (const char *str) |
587a3355 | 1644 | { |
d40e1ca8 AW |
1645 | return scm_from_utf8_stringn (str, -1); |
1646 | } | |
1647 | ||
1648 | SCM | |
1649 | scm_from_utf8_stringn (const char *str, size_t len) | |
1650 | { | |
41d1d984 AW |
1651 | size_t i, char_len; |
1652 | const scm_t_uint8 *ustr = (const scm_t_uint8 *) str; | |
1653 | int ascii = 1, narrow = 1; | |
1654 | SCM res; | |
1655 | ||
1656 | if (len == (size_t) -1) | |
1657 | len = strlen (str); | |
1658 | ||
1659 | i = 0; | |
1660 | char_len = 0; | |
1661 | ||
1662 | while (i < len) | |
1663 | { | |
1664 | if (ustr[i] <= 127) | |
1665 | { | |
1666 | char_len++; | |
1667 | i++; | |
1668 | } | |
1669 | else | |
1670 | { | |
1671 | ucs4_t c; | |
1672 | int nbytes; | |
1673 | ||
1674 | ascii = 0; | |
1675 | ||
1676 | nbytes = u8_mbtouc (&c, ustr + i, len - i); | |
1677 | ||
8c76a897 | 1678 | if (c == 0xfffd) |
41d1d984 AW |
1679 | /* Bad UTF-8. */ |
1680 | decoding_error (__func__, errno, str, len); | |
1681 | ||
1682 | if (c > 255) | |
1683 | narrow = 0; | |
1684 | ||
1685 | char_len++; | |
1686 | i += nbytes; | |
1687 | } | |
1688 | } | |
1689 | ||
1690 | if (ascii) | |
1691 | { | |
1692 | char *dst; | |
1693 | res = scm_i_make_string (char_len, &dst, 0); | |
1694 | memcpy (dst, str, len); | |
1695 | } | |
1696 | else if (narrow) | |
1697 | { | |
1698 | char *dst; | |
1699 | size_t j; | |
1700 | ucs4_t c; | |
1701 | ||
1702 | res = scm_i_make_string (char_len, &dst, 0); | |
1703 | ||
33aadcab | 1704 | for (i = 0, j = 0; i < len; j++) |
41d1d984 AW |
1705 | { |
1706 | i += u8_mbtouc_unsafe (&c, ustr + i, len - i); | |
1707 | dst[j] = (signed char) c; | |
1708 | } | |
1709 | } | |
1710 | else | |
1711 | { | |
1712 | scm_t_wchar *dst; | |
1713 | size_t j; | |
1714 | ucs4_t c; | |
1715 | ||
1716 | res = scm_i_make_wide_string (char_len, &dst, 0); | |
1717 | ||
33aadcab | 1718 | for (i = 0, j = 0; i < len; j++) |
41d1d984 AW |
1719 | { |
1720 | i += u8_mbtouc_unsafe (&c, ustr + i, len - i); | |
1721 | dst[j] = c; | |
1722 | } | |
1723 | } | |
1724 | ||
1725 | return res; | |
587a3355 MG |
1726 | } |
1727 | ||
647dc1ac LC |
1728 | SCM |
1729 | scm_from_utf32_string (const scm_t_wchar *str) | |
1730 | { | |
1731 | return scm_from_utf32_stringn (str, -1); | |
1732 | } | |
1733 | ||
1734 | SCM | |
1735 | scm_from_utf32_stringn (const scm_t_wchar *str, size_t len) | |
1736 | { | |
1737 | SCM result; | |
1738 | scm_t_wchar *buf; | |
1739 | ||
1740 | if (len == (size_t) -1) | |
1741 | len = u32_strlen ((uint32_t *) str); | |
1742 | ||
190d4b0d | 1743 | result = scm_i_make_wide_string (len, &buf, 0); |
647dc1ac LC |
1744 | memcpy (buf, str, len * sizeof (scm_t_wchar)); |
1745 | scm_i_try_narrow_string (result); | |
1746 | ||
1747 | return result; | |
1748 | } | |
1749 | ||
08467a7e AW |
1750 | SCM |
1751 | scm_from_port_string (const char *str, SCM port) | |
1752 | { | |
1753 | return scm_from_port_stringn (str, -1, port); | |
1754 | } | |
1755 | ||
1756 | SCM | |
1757 | scm_from_port_stringn (const char *str, size_t len, SCM port) | |
1758 | { | |
1759 | scm_t_port *pt = SCM_PTAB_ENTRY (port); | |
f6f4feb0 | 1760 | scm_t_port_internal *pti = SCM_PORT_GET_INTERNAL (port); |
08467a7e | 1761 | |
f6f4feb0 | 1762 | if (pti->encoding_mode == SCM_PORT_ENCODING_MODE_LATIN1) |
08467a7e | 1763 | return scm_from_latin1_stringn (str, len); |
f6f4feb0 | 1764 | else if (pti->encoding_mode == SCM_PORT_ENCODING_MODE_UTF8 |
25752c4d AW |
1765 | && (pt->ilseq_handler == SCM_FAILED_CONVERSION_ERROR |
1766 | || (u8_check ((uint8_t *) str, len) == NULL))) | |
08467a7e AW |
1767 | return scm_from_utf8_stringn (str, len); |
1768 | else | |
1769 | return scm_from_stringn (str, len, pt->encoding, pt->ilseq_handler); | |
1770 | } | |
1771 | ||
50b1996f MG |
1772 | /* Create a new scheme string from the C string STR. The memory of |
1773 | STR may be used directly as storage for the new string. */ | |
13a94556 LC |
1774 | /* FIXME: GC-wise, the only way to use the memory area pointed to by STR |
1775 | would be to register a finalizer to eventually free(3) STR, which isn't | |
1776 | worth it. Should we just deprecate the `scm_take_' functions? */ | |
c829a427 MV |
1777 | SCM |
1778 | scm_take_locale_stringn (char *str, size_t len) | |
1779 | { | |
13a94556 | 1780 | SCM res; |
48ddf0d9 | 1781 | |
13a94556 LC |
1782 | res = scm_from_locale_stringn (str, len); |
1783 | free (str); | |
c829a427 | 1784 | |
c829a427 MV |
1785 | return res; |
1786 | } | |
1787 | ||
48ddf0d9 KR |
1788 | SCM |
1789 | scm_take_locale_string (char *str) | |
1790 | { | |
1791 | return scm_take_locale_stringn (str, -1); | |
1792 | } | |
1793 | ||
f1ee6d54 LC |
1794 | /* Change libunistring escapes (`\uXXXX' and `\UXXXXXXXX') in BUF, a |
1795 | *LENP-byte locale-encoded string, to `\xXX', `\uXXXX', or `\UXXXXXX'. | |
31d4d02b LC |
1796 | Set *LENP to the size of the resulting string. |
1797 | ||
1798 | FIXME: This is a hack we should get rid of. See | |
1799 | <http://lists.gnu.org/archive/html/bug-libunistring/2010-09/msg00004.html> | |
1800 | for details. */ | |
1801 | static void | |
1802 | unistring_escapes_to_guile_escapes (char *buf, size_t *lenp) | |
9c44cd45 MG |
1803 | { |
1804 | char *before, *after; | |
1805 | size_t i, j; | |
1806 | ||
4ff2b9f4 LC |
1807 | before = buf; |
1808 | after = buf; | |
9c44cd45 MG |
1809 | i = 0; |
1810 | j = 0; | |
1811 | while (i < *lenp) | |
1812 | { | |
1813 | if ((i <= *lenp - 6) | |
1814 | && before[i] == '\\' | |
1815 | && before[i + 1] == 'u' | |
1816 | && before[i + 2] == '0' && before[i + 3] == '0') | |
1817 | { | |
1818 | /* Convert \u00NN to \xNN */ | |
1819 | after[j] = '\\'; | |
1820 | after[j + 1] = 'x'; | |
30a6b9ca MG |
1821 | after[j + 2] = tolower ((int) before[i + 4]); |
1822 | after[j + 3] = tolower ((int) before[i + 5]); | |
9c44cd45 MG |
1823 | i += 6; |
1824 | j += 4; | |
1825 | } | |
1826 | else if ((i <= *lenp - 10) | |
1827 | && before[i] == '\\' | |
1828 | && before[i + 1] == 'U' | |
1829 | && before[i + 2] == '0' && before[i + 3] == '0') | |
1830 | { | |
1831 | /* Convert \U00NNNNNN to \UNNNNNN */ | |
1832 | after[j] = '\\'; | |
1833 | after[j + 1] = 'U'; | |
30a6b9ca MG |
1834 | after[j + 2] = tolower ((int) before[i + 4]); |
1835 | after[j + 3] = tolower ((int) before[i + 5]); | |
1836 | after[j + 4] = tolower ((int) before[i + 6]); | |
1837 | after[j + 5] = tolower ((int) before[i + 7]); | |
1838 | after[j + 6] = tolower ((int) before[i + 8]); | |
1839 | after[j + 7] = tolower ((int) before[i + 9]); | |
9c44cd45 MG |
1840 | i += 10; |
1841 | j += 8; | |
1842 | } | |
1843 | else | |
1844 | { | |
1845 | after[j] = before[i]; | |
1846 | i++; | |
1847 | j++; | |
1848 | } | |
1849 | } | |
1850 | *lenp = j; | |
9c44cd45 MG |
1851 | } |
1852 | ||
f1ee6d54 LC |
1853 | /* Change libunistring escapes (`\uXXXX' and `\UXXXXXXXX') in BUF, a |
1854 | *LENP-byte locale-encoded string, to `\xXXXX;'. Set *LEN to the size | |
1855 | of the resulting string. BUF must be large enough to handle the | |
1856 | worst case when `\uXXXX' escapes (6 characters) are replaced by | |
1857 | `\xXXXX;' (7 characters). */ | |
31d4d02b LC |
1858 | static void |
1859 | unistring_escapes_to_r6rs_escapes (char *buf, size_t *lenp) | |
d31b9519 MG |
1860 | { |
1861 | char *before, *after; | |
1862 | size_t i, j; | |
1863 | /* The worst case is if the input string contains all 4-digit hex escapes. | |
1864 | "\uXXXX" (six characters) becomes "\xXXXX;" (seven characters) */ | |
1865 | size_t max_out_len = (*lenp * 7) / 6 + 1; | |
1866 | size_t nzeros, ndigits; | |
1867 | ||
4ff2b9f4 | 1868 | before = buf; |
d31b9519 MG |
1869 | after = alloca (max_out_len); |
1870 | i = 0; | |
1871 | j = 0; | |
1872 | while (i < *lenp) | |
1873 | { | |
1874 | if (((i <= *lenp - 6) && before[i] == '\\' && before[i + 1] == 'u') | |
1875 | || ((i <= *lenp - 10) && before[i] == '\\' && before[i + 1] == 'U')) | |
1876 | { | |
1877 | if (before[i + 1] == 'u') | |
1878 | ndigits = 4; | |
1879 | else if (before[i + 1] == 'U') | |
1880 | ndigits = 8; | |
1881 | else | |
1882 | abort (); | |
1883 | ||
1884 | /* Add the R6RS hex escape initial sequence. */ | |
1885 | after[j] = '\\'; | |
1886 | after[j + 1] = 'x'; | |
1887 | ||
1888 | /* Move string positions to the start of the hex numbers. */ | |
1889 | i += 2; | |
1890 | j += 2; | |
1891 | ||
1892 | /* Find the number of initial zeros in this hex number. */ | |
1893 | nzeros = 0; | |
1894 | while (before[i + nzeros] == '0' && nzeros < ndigits) | |
1895 | nzeros++; | |
1896 | ||
1897 | /* Copy the number, skipping initial zeros, and then move the string | |
1898 | positions. */ | |
1899 | if (nzeros == ndigits) | |
1900 | { | |
1901 | after[j] = '0'; | |
1902 | i += ndigits; | |
1903 | j += 1; | |
1904 | } | |
1905 | else | |
1906 | { | |
1907 | int pos; | |
1908 | for (pos = 0; pos < ndigits - nzeros; pos++) | |
1909 | after[j + pos] = tolower ((int) before[i + nzeros + pos]); | |
1910 | i += ndigits; | |
1911 | j += (ndigits - nzeros); | |
1912 | } | |
1913 | ||
1914 | /* Add terminating semicolon. */ | |
1915 | after[j] = ';'; | |
1916 | j++; | |
1917 | } | |
1918 | else | |
1919 | { | |
1920 | after[j] = before[i]; | |
1921 | i++; | |
1922 | j++; | |
1923 | } | |
1924 | } | |
1925 | *lenp = j; | |
d31b9519 MG |
1926 | memcpy (before, after, j); |
1927 | } | |
1928 | ||
cf313a94 | 1929 | char * |
d40e1ca8 | 1930 | scm_to_locale_string (SCM str) |
cf313a94 | 1931 | { |
d40e1ca8 | 1932 | return scm_to_locale_stringn (str, NULL); |
cf313a94 | 1933 | } |
d31b9519 | 1934 | |
c829a427 | 1935 | char * |
fac32b51 | 1936 | scm_to_locale_stringn (SCM str, size_t *lenp) |
c829a427 | 1937 | { |
b22e94db | 1938 | return scm_to_stringn (str, lenp, |
95f5e303 | 1939 | locale_charset (), |
b22e94db | 1940 | scm_i_default_port_conversion_handler ()); |
9c44cd45 MG |
1941 | } |
1942 | ||
d40e1ca8 AW |
1943 | char * |
1944 | scm_to_latin1_string (SCM str) | |
1945 | { | |
1946 | return scm_to_latin1_stringn (str, NULL); | |
1947 | } | |
1948 | ||
1949 | char * | |
1950 | scm_to_latin1_stringn (SCM str, size_t *lenp) | |
e9a35a96 | 1951 | #define FUNC_NAME "scm_to_latin1_stringn" |
d40e1ca8 | 1952 | { |
e9a35a96 LC |
1953 | char *result; |
1954 | ||
1955 | SCM_VALIDATE_STRING (1, str); | |
1956 | ||
1957 | if (scm_i_is_narrow_string (str)) | |
1958 | { | |
fe133640 AW |
1959 | size_t len = scm_i_string_length (str); |
1960 | ||
e9a35a96 | 1961 | if (lenp) |
fe133640 | 1962 | *lenp = len; |
e9a35a96 | 1963 | |
fe133640 | 1964 | result = scm_strndup (scm_i_string_data (str), len); |
e9a35a96 LC |
1965 | } |
1966 | else | |
1967 | result = scm_to_stringn (str, lenp, NULL, | |
fe133640 | 1968 | SCM_FAILED_CONVERSION_ERROR); |
e9a35a96 LC |
1969 | |
1970 | return result; | |
d40e1ca8 | 1971 | } |
e9a35a96 | 1972 | #undef FUNC_NAME |
d40e1ca8 AW |
1973 | |
1974 | char * | |
1975 | scm_to_utf8_string (SCM str) | |
1976 | { | |
1977 | return scm_to_utf8_stringn (str, NULL); | |
1978 | } | |
1979 | ||
e3d45974 AW |
1980 | static size_t |
1981 | latin1_u8_strlen (const scm_t_uint8 *str, size_t len) | |
1982 | { | |
1983 | size_t ret, i; | |
1984 | for (i = 0, ret = 0; i < len; i++) | |
1985 | ret += (str[i] < 128) ? 1 : 2; | |
1986 | return ret; | |
1987 | } | |
1988 | ||
1989 | static scm_t_uint8* | |
1990 | latin1_to_u8 (const scm_t_uint8 *str, size_t latin_len, | |
1991 | scm_t_uint8 *u8_result, size_t *u8_lenp) | |
1992 | { | |
1993 | size_t i, n; | |
1994 | size_t u8_len = latin1_u8_strlen (str, latin_len); | |
1995 | ||
1996 | if (!(u8_result && u8_lenp && *u8_lenp > u8_len)) | |
1997 | u8_result = scm_malloc (u8_len + 1); | |
1998 | if (u8_lenp) | |
1999 | *u8_lenp = u8_len; | |
2000 | ||
2001 | for (i = 0, n = 0; i < latin_len; i++) | |
2002 | n += u8_uctomb (u8_result + n, str[i], u8_len - n); | |
2003 | if (n != u8_len) | |
2004 | abort (); | |
2005 | u8_result[n] = 0; | |
2006 | ||
2007 | return u8_result; | |
2008 | } | |
2009 | ||
e26da7a2 MW |
2010 | /* UTF-8 code table |
2011 | ||
2012 | (Note that this includes code points that are not allowed by Unicode, | |
2013 | but since this function has no way to report an error, and its | |
2014 | purpose is to determine the size of destination buffers for | |
2015 | libunicode conversion functions, we err on the safe side and handle | |
2016 | everything that libunicode might conceivably handle, now or in the | |
2017 | future.) | |
2c1b7951 AW |
2018 | |
2019 | Char. number range | UTF-8 octet sequence | |
2020 | (hexadecimal) | (binary) | |
e26da7a2 | 2021 | --------------------+------------------------------------------------------ |
2c1b7951 AW |
2022 | 0000 0000-0000 007F | 0xxxxxxx |
2023 | 0000 0080-0000 07FF | 110xxxxx 10xxxxxx | |
2024 | 0000 0800-0000 FFFF | 1110xxxx 10xxxxxx 10xxxxxx | |
e26da7a2 MW |
2025 | 0001 0000-001F FFFF | 11110xxx 10xxxxxx 10xxxxxx 10xxxxxx |
2026 | 0020 0000-03FF FFFF | 111110xx 10xxxxxx 10xxxxxx 10xxxxxx 10xxxxxx | |
2027 | 0400 0000-7FFF FFFF | 1111110x 10xxxxxx 10xxxxxx 10xxxxxx 10xxxxxx 10xxxxxx | |
2c1b7951 AW |
2028 | */ |
2029 | ||
2030 | static size_t | |
e26da7a2 | 2031 | u32_u8_length_in_bytes (const scm_t_uint32 *str, size_t len) |
2c1b7951 AW |
2032 | { |
2033 | size_t ret, i; | |
2034 | ||
2035 | for (i = 0, ret = 0; i < len; i++) | |
2036 | { | |
2037 | scm_t_uint32 c = str[i]; | |
2038 | ||
2039 | if (c <= 0x7f) | |
2040 | ret += 1; | |
2041 | else if (c <= 0x7ff) | |
2042 | ret += 2; | |
2043 | else if (c <= 0xffff) | |
2044 | ret += 3; | |
e26da7a2 | 2045 | else if (c <= 0x1fffff) |
2c1b7951 | 2046 | ret += 4; |
e26da7a2 MW |
2047 | else if (c <= 0x3ffffff) |
2048 | ret += 5; | |
2049 | else | |
2050 | ret += 6; | |
2c1b7951 AW |
2051 | } |
2052 | ||
2053 | return ret; | |
2054 | } | |
2055 | ||
d40e1ca8 AW |
2056 | char * |
2057 | scm_to_utf8_stringn (SCM str, size_t *lenp) | |
ee26a9eb | 2058 | #define FUNC_NAME "scm_to_utf8_stringn" |
d40e1ca8 | 2059 | { |
ee26a9eb AW |
2060 | SCM_VALIDATE_STRING (1, str); |
2061 | ||
e3d45974 AW |
2062 | if (scm_i_is_narrow_string (str)) |
2063 | return (char *) latin1_to_u8 ((scm_t_uint8 *) scm_i_string_chars (str), | |
2064 | scm_i_string_length (str), | |
2065 | NULL, lenp); | |
2066 | else | |
2c1b7951 | 2067 | { |
bbb9f000 | 2068 | scm_t_uint32 *chars = (scm_t_uint32 *) scm_i_string_wide_chars (str); |
2c1b7951 | 2069 | scm_t_uint8 *buf, *ret; |
bbb9f000 MW |
2070 | size_t num_chars = scm_i_string_length (str); |
2071 | size_t num_bytes_predicted, num_bytes_actual; | |
2c1b7951 | 2072 | |
bbb9f000 | 2073 | num_bytes_predicted = u32_u8_length_in_bytes (chars, num_chars); |
2c1b7951 | 2074 | |
e26da7a2 | 2075 | if (lenp) |
2c1b7951 | 2076 | { |
bbb9f000 MW |
2077 | *lenp = num_bytes_predicted; |
2078 | buf = scm_malloc (num_bytes_predicted); | |
2c1b7951 | 2079 | } |
e26da7a2 MW |
2080 | else |
2081 | { | |
bbb9f000 MW |
2082 | buf = scm_malloc (num_bytes_predicted + 1); |
2083 | buf[num_bytes_predicted] = 0; | |
e26da7a2 MW |
2084 | } |
2085 | ||
bbb9f000 MW |
2086 | num_bytes_actual = num_bytes_predicted; |
2087 | ret = u32_to_u8 (chars, num_chars, buf, &num_bytes_actual); | |
e26da7a2 | 2088 | |
bbb9f000 | 2089 | if (SCM_LIKELY (ret == buf && num_bytes_actual == num_bytes_predicted)) |
e26da7a2 | 2090 | return (char *) ret; |
2c1b7951 AW |
2091 | |
2092 | /* An error: a bad codepoint. */ | |
2093 | { | |
2094 | int saved_errno = errno; | |
2095 | ||
2096 | free (buf); | |
2097 | if (!saved_errno) | |
2098 | abort (); | |
2099 | ||
2100 | scm_decoding_error ("scm_to_utf8_stringn", errno, | |
2101 | "invalid codepoint in string", str); | |
2102 | ||
2103 | /* Not reached. */ | |
2104 | return NULL; | |
2105 | } | |
2106 | } | |
d40e1ca8 | 2107 | } |
ee26a9eb | 2108 | #undef FUNC_NAME |
d40e1ca8 | 2109 | |
647dc1ac LC |
2110 | scm_t_wchar * |
2111 | scm_to_utf32_string (SCM str) | |
2112 | { | |
2113 | return scm_to_utf32_stringn (str, NULL); | |
2114 | } | |
2115 | ||
2116 | scm_t_wchar * | |
2117 | scm_to_utf32_stringn (SCM str, size_t *lenp) | |
2118 | #define FUNC_NAME "scm_to_utf32_stringn" | |
2119 | { | |
2120 | scm_t_wchar *result; | |
2121 | ||
2122 | SCM_VALIDATE_STRING (1, str); | |
2123 | ||
2124 | if (scm_i_is_narrow_string (str)) | |
e3d45974 AW |
2125 | { |
2126 | scm_t_uint8 *codepoints; | |
2127 | size_t i, len; | |
2128 | ||
2129 | codepoints = (scm_t_uint8*) scm_i_string_chars (str); | |
2130 | len = scm_i_string_length (str); | |
2131 | if (lenp) | |
2132 | *lenp = len; | |
2133 | ||
2134 | result = scm_malloc ((len + 1) * sizeof (scm_t_wchar)); | |
2135 | for (i = 0; i < len; i++) | |
2136 | result[i] = codepoints[i]; | |
2137 | result[len] = 0; | |
2138 | } | |
647dc1ac LC |
2139 | else |
2140 | { | |
2141 | size_t len; | |
2142 | ||
2143 | len = scm_i_string_length (str); | |
2144 | if (lenp) | |
2145 | *lenp = len; | |
2146 | ||
2147 | result = scm_malloc ((len + 1) * sizeof (scm_t_wchar)); | |
2148 | memcpy (result, scm_i_string_wide_chars (str), | |
2149 | len * sizeof (scm_t_wchar)); | |
2150 | result[len] = 0; | |
2151 | } | |
2152 | ||
2153 | return result; | |
2154 | } | |
2155 | #undef FUNC_NAME | |
2156 | ||
08467a7e AW |
2157 | char * |
2158 | scm_to_port_string (SCM str, SCM port) | |
2159 | { | |
2160 | return scm_to_port_stringn (str, NULL, port); | |
2161 | } | |
2162 | ||
2163 | char * | |
2164 | scm_to_port_stringn (SCM str, size_t *lenp, SCM port) | |
2165 | { | |
2166 | scm_t_port *pt = SCM_PTAB_ENTRY (port); | |
f6f4feb0 | 2167 | scm_t_port_internal *pti = SCM_PORT_GET_INTERNAL (port); |
08467a7e | 2168 | |
f6f4feb0 | 2169 | if (pti->encoding_mode == SCM_PORT_ENCODING_MODE_LATIN1 |
08467a7e AW |
2170 | && pt->ilseq_handler == SCM_FAILED_CONVERSION_ERROR) |
2171 | return scm_to_latin1_stringn (str, lenp); | |
f6f4feb0 | 2172 | else if (pti->encoding_mode == SCM_PORT_ENCODING_MODE_UTF8) |
08467a7e AW |
2173 | return scm_to_utf8_stringn (str, lenp); |
2174 | else | |
2175 | return scm_to_stringn (str, lenp, pt->encoding, pt->ilseq_handler); | |
2176 | } | |
2177 | ||
29bcdbb0 LC |
2178 | /* Return a malloc(3)-allocated buffer containing the contents of STR encoded |
2179 | according to ENCODING. If LENP is non-NULL, set it to the size in bytes of | |
2180 | the returned buffer. If the conversion to ENCODING fails, apply the strategy | |
2181 | defined by HANDLER. */ | |
9c44cd45 | 2182 | char * |
587a3355 | 2183 | scm_to_stringn (SCM str, size_t *lenp, const char *encoding, |
eca29b02 | 2184 | scm_t_string_failed_conversion_handler handler) |
9c44cd45 | 2185 | { |
9c44cd45 MG |
2186 | char *buf; |
2187 | size_t ilen, len, i; | |
889975e5 MG |
2188 | int ret; |
2189 | const char *enc; | |
4d4528e7 | 2190 | |
3ee86942 | 2191 | if (!scm_is_string (str)) |
c829a427 | 2192 | scm_wrong_type_arg_msg (NULL, 0, str, "string"); |
9c44cd45 MG |
2193 | ilen = scm_i_string_length (str); |
2194 | ||
2195 | if (ilen == 0) | |
2196 | { | |
2197 | buf = scm_malloc (1); | |
2198 | buf[0] = '\0'; | |
2199 | if (lenp) | |
2200 | *lenp = 0; | |
2201 | return buf; | |
2202 | } | |
587a3355 | 2203 | |
c829a427 | 2204 | if (lenp == NULL) |
9c44cd45 MG |
2205 | for (i = 0; i < ilen; i++) |
2206 | if (scm_i_string_ref (str, i) == '\0') | |
2207 | scm_misc_error (NULL, | |
2208 | "string contains #\\nul character: ~S", | |
2209 | scm_list_1 (str)); | |
2210 | ||
f6f4feb0 MW |
2211 | if (scm_i_is_narrow_string (str) |
2212 | && c_strcasecmp (encoding, "ISO-8859-1") == 0) | |
c829a427 | 2213 | { |
889975e5 MG |
2214 | /* If using native Latin-1 encoding, just copy the string |
2215 | contents. */ | |
9c44cd45 MG |
2216 | if (lenp) |
2217 | { | |
2218 | buf = scm_malloc (ilen); | |
2219 | memcpy (buf, scm_i_string_chars (str), ilen); | |
2220 | *lenp = ilen; | |
2221 | return buf; | |
2222 | } | |
2223 | else | |
2224 | { | |
2225 | buf = scm_malloc (ilen + 1); | |
2226 | memcpy (buf, scm_i_string_chars (str), ilen); | |
2227 | buf[ilen] = '\0'; | |
2228 | return buf; | |
2229 | } | |
c829a427 | 2230 | } |
9c44cd45 | 2231 | |
587a3355 | 2232 | |
9c44cd45 MG |
2233 | buf = NULL; |
2234 | len = 0; | |
889975e5 MG |
2235 | enc = encoding; |
2236 | if (enc == NULL) | |
2237 | enc = "ISO-8859-1"; | |
2238 | if (scm_i_is_narrow_string (str)) | |
2239 | { | |
2240 | ret = mem_iconveh (scm_i_string_chars (str), ilen, | |
2241 | "ISO-8859-1", enc, | |
2242 | (enum iconv_ilseq_handler) handler, NULL, | |
2243 | &buf, &len); | |
9c44cd45 | 2244 | |
889975e5 | 2245 | if (ret != 0) |
ef7e4ba3 | 2246 | scm_encoding_error (__func__, errno, |
6851d3be LC |
2247 | "cannot convert narrow string to output locale", |
2248 | SCM_BOOL_F, | |
2249 | /* FIXME: Faulty character unknown. */ | |
2250 | SCM_BOOL_F); | |
889975e5 MG |
2251 | } |
2252 | else | |
2253 | { | |
d31b9519 | 2254 | buf = u32_conv_to_encoding (enc, |
889975e5 | 2255 | (enum iconv_ilseq_handler) handler, |
d31b9519 | 2256 | (scm_t_uint32 *) scm_i_string_wide_chars (str), |
889975e5 MG |
2257 | ilen, |
2258 | NULL, | |
2259 | NULL, &len); | |
2260 | if (buf == NULL) | |
ef7e4ba3 | 2261 | scm_encoding_error (__func__, errno, |
6851d3be LC |
2262 | "cannot convert wide string to output locale", |
2263 | SCM_BOOL_F, | |
2264 | /* FIXME: Faulty character unknown. */ | |
2265 | SCM_BOOL_F); | |
d31b9519 MG |
2266 | } |
2267 | if (handler == SCM_FAILED_CONVERSION_ESCAPE_SEQUENCE) | |
2268 | { | |
2269 | if (SCM_R6RS_ESCAPES_P) | |
f1ee6d54 LC |
2270 | { |
2271 | /* The worst case is if the input string contains all 4-digit | |
2272 | hex escapes. "\uXXXX" (six characters) becomes "\xXXXX;" | |
2273 | (seven characters). Make BUF large enough to hold | |
2274 | that. */ | |
2275 | buf = scm_realloc (buf, (len * 7) / 6 + 1); | |
31d4d02b | 2276 | unistring_escapes_to_r6rs_escapes (buf, &len); |
f1ee6d54 | 2277 | } |
d31b9519 | 2278 | else |
31d4d02b | 2279 | unistring_escapes_to_guile_escapes (buf, &len); |
4ff2b9f4 LC |
2280 | |
2281 | buf = scm_realloc (buf, len); | |
889975e5 | 2282 | } |
9c44cd45 | 2283 | if (lenp) |
4d4528e7 | 2284 | *lenp = len; |
9c44cd45 MG |
2285 | else |
2286 | { | |
2287 | buf = scm_realloc (buf, len + 1); | |
2288 | buf[len] = '\0'; | |
2289 | } | |
24933780 | 2290 | |
c829a427 | 2291 | scm_remember_upto_here_1 (str); |
9c44cd45 | 2292 | return buf; |
4d4528e7 | 2293 | } |
af68e5e5 | 2294 | |
c829a427 MV |
2295 | size_t |
2296 | scm_to_locale_stringbuf (SCM str, char *buf, size_t max_len) | |
2297 | { | |
2298 | size_t len; | |
9c44cd45 | 2299 | char *result = NULL; |
3ee86942 | 2300 | if (!scm_is_string (str)) |
c829a427 | 2301 | scm_wrong_type_arg_msg (NULL, 0, str, "string"); |
9c44cd45 MG |
2302 | result = scm_to_locale_stringn (str, &len); |
2303 | ||
2304 | memcpy (buf, result, (len > max_len) ? max_len : len); | |
2305 | free (result); | |
2306 | ||
c829a427 MV |
2307 | scm_remember_upto_here_1 (str); |
2308 | return len; | |
2309 | } | |
af68e5e5 | 2310 | |
a3d7d5d5 LC |
2311 | \f |
2312 | /* Unicode string normalization. */ | |
2313 | ||
edb7bb47 JG |
2314 | /* This function is a partial clone of SCM_STRING_TO_U32_BUF from |
2315 | libguile/i18n.c. It would be useful to have this factored out into a more | |
2316 | convenient location, but its use of alloca makes that tricky to do. */ | |
2317 | ||
2318 | static SCM | |
2319 | normalize_str (SCM string, uninorm_t form) | |
2320 | { | |
2321 | SCM ret; | |
2322 | scm_t_uint32 *w_str; | |
2323 | scm_t_wchar *cbuf; | |
2324 | size_t rlen, len = scm_i_string_length (string); | |
2325 | ||
2326 | if (scm_i_is_narrow_string (string)) | |
2327 | { | |
2328 | size_t i; | |
2329 | const char *buf = scm_i_string_chars (string); | |
2330 | ||
2331 | w_str = alloca (sizeof (scm_t_wchar) * (len + 1)); | |
2332 | ||
2333 | for (i = 0; i < len; i ++) | |
2334 | w_str[i] = (unsigned char) buf[i]; | |
2335 | w_str[len] = 0; | |
2336 | } | |
d8164b04 JG |
2337 | else |
2338 | w_str = (scm_t_uint32 *) scm_i_string_wide_chars (string); | |
2339 | ||
edb7bb47 JG |
2340 | w_str = u32_normalize (form, w_str, len, NULL, &rlen); |
2341 | ||
190d4b0d | 2342 | ret = scm_i_make_wide_string (rlen, &cbuf, 0); |
edb7bb47 JG |
2343 | u32_cpy ((scm_t_uint32 *) cbuf, w_str, rlen); |
2344 | free (w_str); | |
d8164b04 JG |
2345 | |
2346 | scm_i_try_narrow_string (ret); | |
2347 | ||
edb7bb47 JG |
2348 | return ret; |
2349 | } | |
2350 | ||
2351 | SCM_DEFINE (scm_string_normalize_nfc, "string-normalize-nfc", 1, 0, 0, | |
2352 | (SCM string), | |
2353 | "Returns the NFC normalized form of @var{string}.") | |
2354 | #define FUNC_NAME s_scm_string_normalize_nfc | |
2355 | { | |
2356 | SCM_VALIDATE_STRING (1, string); | |
2357 | return normalize_str (string, UNINORM_NFC); | |
2358 | } | |
2359 | #undef FUNC_NAME | |
2360 | ||
2361 | SCM_DEFINE (scm_string_normalize_nfd, "string-normalize-nfd", 1, 0, 0, | |
2362 | (SCM string), | |
2363 | "Returns the NFD normalized form of @var{string}.") | |
2364 | #define FUNC_NAME s_scm_string_normalize_nfd | |
2365 | { | |
2366 | SCM_VALIDATE_STRING (1, string); | |
2367 | return normalize_str (string, UNINORM_NFD); | |
2368 | } | |
2369 | #undef FUNC_NAME | |
2370 | ||
2371 | SCM_DEFINE (scm_string_normalize_nfkc, "string-normalize-nfkc", 1, 0, 0, | |
2372 | (SCM string), | |
2373 | "Returns the NFKC normalized form of @var{string}.") | |
2374 | #define FUNC_NAME s_scm_string_normalize_nfkc | |
2375 | { | |
2376 | SCM_VALIDATE_STRING (1, string); | |
2377 | return normalize_str (string, UNINORM_NFKC); | |
2378 | } | |
2379 | #undef FUNC_NAME | |
2380 | ||
2381 | SCM_DEFINE (scm_string_normalize_nfkd, "string-normalize-nfkd", 1, 0, 0, | |
2382 | (SCM string), | |
2383 | "Returns the NFKD normalized form of @var{string}.") | |
2384 | #define FUNC_NAME s_scm_string_normalize_nfkd | |
2385 | { | |
2386 | SCM_VALIDATE_STRING (1, string); | |
2387 | return normalize_str (string, UNINORM_NFKD); | |
2388 | } | |
2389 | #undef FUNC_NAME | |
2390 | ||
7505c6e0 MW |
2391 | /* converts C scm_array of strings to SCM scm_list of strings. |
2392 | If argc < 0, a null terminated scm_array is assumed. | |
2393 | The current locale encoding is assumed */ | |
9c44cd45 | 2394 | SCM |
3ee86942 MV |
2395 | scm_makfromstrs (int argc, char **argv) |
2396 | { | |
2397 | int i = argc; | |
2398 | SCM lst = SCM_EOL; | |
2399 | if (0 > i) | |
2400 | for (i = 0; argv[i]; i++); | |
2401 | while (i--) | |
2402 | lst = scm_cons (scm_from_locale_string (argv[i]), lst); | |
2403 | return lst; | |
2404 | } | |
2405 | ||
c829a427 | 2406 | /* Return a newly allocated array of char pointers to each of the strings |
7505c6e0 MW |
2407 | in args, with a terminating NULL pointer. The strings are encoded using |
2408 | the current locale. */ | |
c829a427 MV |
2409 | |
2410 | char ** | |
2411 | scm_i_allocate_string_pointers (SCM list) | |
2a776823 | 2412 | #define FUNC_NAME "scm_i_allocate_string_pointers" |
af68e5e5 | 2413 | { |
c829a427 | 2414 | char **result; |
7505c6e0 | 2415 | int list_len = scm_ilength (list); |
c829a427 MV |
2416 | int i; |
2417 | ||
7505c6e0 | 2418 | if (list_len < 0) |
c829a427 MV |
2419 | scm_wrong_type_arg_msg (NULL, 0, list, "proper list"); |
2420 | ||
7505c6e0 | 2421 | result = scm_gc_malloc ((list_len + 1) * sizeof (char *), |
2a776823 | 2422 | "string pointers"); |
7505c6e0 | 2423 | result[list_len] = NULL; |
c829a427 | 2424 | |
7505c6e0 | 2425 | /* The list might have been modified in another thread, so |
c829a427 MV |
2426 | we check LIST before each access. |
2427 | */ | |
7505c6e0 | 2428 | for (i = 0; i < list_len && scm_is_pair (list); i++) |
c829a427 | 2429 | { |
7505c6e0 MW |
2430 | SCM str = SCM_CAR (list); |
2431 | size_t len; /* String length in bytes */ | |
2432 | char *c_str = scm_to_locale_stringn (str, &len); | |
2433 | ||
2434 | /* OPTIMIZE-ME: Right now, scm_to_locale_stringn always uses | |
2435 | scm_malloc to allocate the returned string, which must be | |
2436 | explicitly deallocated. This forces us to copy the string a | |
2437 | second time into a new buffer. Ideally there would be variants | |
2438 | of scm_to_*_stringn that can return garbage-collected buffers. */ | |
2439 | ||
2440 | result[i] = scm_gc_malloc_pointerless (len + 1, "string"); | |
2441 | memcpy (result[i], c_str, len); | |
2a776823 | 2442 | result[i][len] = '\0'; |
7505c6e0 | 2443 | free (c_str); |
2a776823 | 2444 | |
c829a427 MV |
2445 | list = SCM_CDR (list); |
2446 | } | |
2447 | ||
c829a427 | 2448 | return result; |
af68e5e5 | 2449 | } |
2a776823 | 2450 | #undef FUNC_NAME |
24933780 | 2451 | |
6f14f578 MV |
2452 | void |
2453 | scm_i_get_substring_spec (size_t len, | |
2454 | SCM start, size_t *cstart, | |
2455 | SCM end, size_t *cend) | |
2456 | { | |
2457 | if (SCM_UNBNDP (start)) | |
2458 | *cstart = 0; | |
2459 | else | |
2460 | *cstart = scm_to_unsigned_integer (start, 0, len); | |
2461 | ||
2462 | if (SCM_UNBNDP (end)) | |
2463 | *cend = len; | |
2464 | else | |
2465 | *cend = scm_to_unsigned_integer (end, *cstart, len); | |
2466 | } | |
2467 | ||
f65e0168 | 2468 | SCM_VECTOR_IMPLEMENTATION (SCM_ARRAY_ELEMENT_TYPE_CHAR, scm_make_string) |
2a610be5 | 2469 | |
0f2d19dd JB |
2470 | void |
2471 | scm_init_strings () | |
0f2d19dd | 2472 | { |
a7e392c1 | 2473 | scm_nullstr = scm_i_make_string (0, NULL, 0); |
7c33806a | 2474 | |
a0599745 | 2475 | #include "libguile/strings.x" |
0f2d19dd JB |
2476 | } |
2477 | ||
89e00824 ML |
2478 | |
2479 | /* | |
2480 | Local Variables: | |
2481 | c-file-style: "gnu" | |
2482 | End: | |
2483 | */ |