Commit | Line | Data |
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8c76a897 | 1 | /* Copyright (C) 1995,1996,1998,2000,2001, 2004, 2006, 2008, 2009, 2010, 2011, 2012, 2013 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 | ||
50b1996f MG |
283 | /* Create a scheme string with space for LEN 8-bit Latin-1-encoded |
284 | characters. CHARSP, if not NULL, will be set to location of the | |
190d4b0d LC |
285 | char array. If READ_ONLY_P, the returned string is read-only; |
286 | otherwise it is writable. */ | |
3ee86942 | 287 | SCM |
190d4b0d | 288 | scm_i_make_string (size_t len, char **charsp, int read_only_p) |
3ee86942 | 289 | { |
69cd5299 MW |
290 | static SCM null_stringbuf = SCM_BOOL_F; |
291 | SCM buf; | |
3ee86942 | 292 | SCM res; |
69cd5299 MW |
293 | |
294 | if (len == 0) | |
295 | { | |
296 | if (SCM_UNLIKELY (scm_is_false (null_stringbuf))) | |
297 | { | |
298 | null_stringbuf = make_stringbuf (0); | |
299 | SET_STRINGBUF_SHARED (null_stringbuf); | |
300 | } | |
301 | buf = null_stringbuf; | |
302 | } | |
303 | else | |
304 | buf = make_stringbuf (len); | |
305 | ||
3ee86942 | 306 | if (charsp) |
f59cf998 | 307 | *charsp = (char *) STRINGBUF_CHARS (buf); |
190d4b0d LC |
308 | res = scm_double_cell (read_only_p ? RO_STRING_TAG : STRING_TAG, |
309 | SCM_UNPACK (buf), | |
310 | (scm_t_bits) 0, (scm_t_bits) len); | |
3ee86942 | 311 | return res; |
0f2d19dd JB |
312 | } |
313 | ||
50b1996f MG |
314 | /* Create a scheme string with space for LEN 32-bit UCS-4-encoded |
315 | characters. CHARSP, if not NULL, will be set to location of the | |
190d4b0d LC |
316 | character array. If READ_ONLY_P, the returned string is read-only; |
317 | otherwise it is writable. */ | |
9c44cd45 | 318 | SCM |
190d4b0d | 319 | scm_i_make_wide_string (size_t len, scm_t_wchar **charsp, int read_only_p) |
9c44cd45 MG |
320 | { |
321 | SCM buf = make_wide_stringbuf (len); | |
322 | SCM res; | |
323 | if (charsp) | |
324 | *charsp = STRINGBUF_WIDE_CHARS (buf); | |
190d4b0d LC |
325 | res = scm_double_cell (read_only_p ? RO_STRING_TAG : STRING_TAG, |
326 | SCM_UNPACK (buf), | |
9c44cd45 MG |
327 | (scm_t_bits) 0, (scm_t_bits) len); |
328 | return res; | |
329 | } | |
330 | ||
3ee86942 MV |
331 | static void |
332 | validate_substring_args (SCM str, size_t start, size_t end) | |
333 | { | |
334 | if (!IS_STRING (str)) | |
335 | scm_wrong_type_arg_msg (NULL, 0, str, "string"); | |
336 | if (start > STRING_LENGTH (str)) | |
337 | scm_out_of_range (NULL, scm_from_size_t (start)); | |
338 | if (end > STRING_LENGTH (str) || end < start) | |
339 | scm_out_of_range (NULL, scm_from_size_t (end)); | |
340 | } | |
0f2d19dd | 341 | |
e1b29f6a MV |
342 | static inline void |
343 | get_str_buf_start (SCM *str, SCM *buf, size_t *start) | |
344 | { | |
345 | *start = STRING_START (*str); | |
346 | if (IS_SH_STRING (*str)) | |
347 | { | |
348 | *str = SH_STRING_STRING (*str); | |
349 | *start += STRING_START (*str); | |
350 | } | |
351 | *buf = STRING_STRINGBUF (*str); | |
352 | } | |
353 | ||
3ee86942 MV |
354 | SCM |
355 | scm_i_substring (SCM str, size_t start, size_t end) | |
0f2d19dd | 356 | { |
17bec545 MW |
357 | if (start == end) |
358 | return scm_i_make_string (0, NULL, 0); | |
359 | else | |
360 | { | |
361 | SCM buf; | |
362 | size_t str_start; | |
363 | get_str_buf_start (&str, &buf, &str_start); | |
364 | scm_i_pthread_mutex_lock (&stringbuf_write_mutex); | |
365 | SET_STRINGBUF_SHARED (buf); | |
366 | scm_i_pthread_mutex_unlock (&stringbuf_write_mutex); | |
367 | return scm_double_cell (STRING_TAG, SCM_UNPACK(buf), | |
368 | (scm_t_bits)str_start + start, | |
369 | (scm_t_bits) end - start); | |
370 | } | |
0f2d19dd JB |
371 | } |
372 | ||
ed35de72 MV |
373 | SCM |
374 | scm_i_substring_read_only (SCM str, size_t start, size_t end) | |
375 | { | |
17bec545 MW |
376 | if (start == end) |
377 | return scm_i_make_string (0, NULL, 1); | |
378 | else | |
379 | { | |
380 | SCM buf; | |
381 | size_t str_start; | |
382 | get_str_buf_start (&str, &buf, &str_start); | |
383 | scm_i_pthread_mutex_lock (&stringbuf_write_mutex); | |
384 | SET_STRINGBUF_SHARED (buf); | |
385 | scm_i_pthread_mutex_unlock (&stringbuf_write_mutex); | |
386 | return scm_double_cell (RO_STRING_TAG, SCM_UNPACK(buf), | |
387 | (scm_t_bits)str_start + start, | |
388 | (scm_t_bits) end - start); | |
389 | } | |
ed35de72 MV |
390 | } |
391 | ||
3ee86942 MV |
392 | SCM |
393 | scm_i_substring_copy (SCM str, size_t start, size_t end) | |
394 | { | |
d5b75b6c MW |
395 | if (start == end) |
396 | return scm_i_make_string (0, NULL, 0); | |
9c44cd45 MG |
397 | else |
398 | { | |
d5b75b6c MW |
399 | size_t len = end - start; |
400 | SCM buf, my_buf, substr; | |
401 | size_t str_start; | |
402 | int wide = 0; | |
403 | get_str_buf_start (&str, &buf, &str_start); | |
404 | if (scm_i_is_narrow_string (str)) | |
405 | { | |
406 | my_buf = make_stringbuf (len); | |
407 | memcpy (STRINGBUF_CHARS (my_buf), | |
408 | STRINGBUF_CHARS (buf) + str_start + start, len); | |
409 | } | |
410 | else | |
411 | { | |
412 | my_buf = make_wide_stringbuf (len); | |
413 | u32_cpy ((scm_t_uint32 *) STRINGBUF_WIDE_CHARS (my_buf), | |
414 | (scm_t_uint32 *) (STRINGBUF_WIDE_CHARS (buf) + str_start | |
415 | + start), len); | |
416 | wide = 1; | |
417 | } | |
418 | scm_remember_upto_here_1 (buf); | |
419 | substr = scm_double_cell (STRING_TAG, SCM_UNPACK (my_buf), | |
420 | (scm_t_bits) 0, (scm_t_bits) len); | |
421 | if (wide) | |
422 | scm_i_try_narrow_string (substr); | |
423 | return substr; | |
9c44cd45 | 424 | } |
3ee86942 | 425 | } |
0f2d19dd | 426 | |
e1b29f6a MV |
427 | SCM |
428 | scm_i_substring_shared (SCM str, size_t start, size_t end) | |
429 | { | |
430 | if (start == 0 && end == STRING_LENGTH (str)) | |
431 | return str; | |
17bec545 MW |
432 | else if (start == end) |
433 | return scm_i_make_string (0, NULL, 0); | |
434 | else | |
e1b29f6a MV |
435 | { |
436 | size_t len = end - start; | |
437 | if (IS_SH_STRING (str)) | |
438 | { | |
439 | start += STRING_START (str); | |
440 | str = SH_STRING_STRING (str); | |
441 | } | |
442 | return scm_double_cell (SH_STRING_TAG, SCM_UNPACK(str), | |
443 | (scm_t_bits)start, (scm_t_bits) len); | |
444 | } | |
445 | } | |
446 | ||
3ee86942 MV |
447 | SCM |
448 | scm_c_substring (SCM str, size_t start, size_t end) | |
449 | { | |
450 | validate_substring_args (str, start, end); | |
451 | return scm_i_substring (str, start, end); | |
452 | } | |
ee149d03 | 453 | |
ed35de72 MV |
454 | SCM |
455 | scm_c_substring_read_only (SCM str, size_t start, size_t end) | |
456 | { | |
457 | validate_substring_args (str, start, end); | |
458 | return scm_i_substring_read_only (str, start, end); | |
459 | } | |
460 | ||
0f2d19dd | 461 | SCM |
3ee86942 | 462 | scm_c_substring_copy (SCM str, size_t start, size_t end) |
0f2d19dd | 463 | { |
3ee86942 MV |
464 | validate_substring_args (str, start, end); |
465 | return scm_i_substring_copy (str, start, end); | |
466 | } | |
467 | ||
3ee86942 MV |
468 | SCM |
469 | scm_c_substring_shared (SCM str, size_t start, size_t end) | |
470 | { | |
471 | validate_substring_args (str, start, end); | |
472 | return scm_i_substring_shared (str, start, end); | |
473 | } | |
0f2d19dd | 474 | |
d6c74168 | 475 | \f |
3ee86942 MV |
476 | /* Internal accessors |
477 | */ | |
478 | ||
50b1996f MG |
479 | /* Returns the number of characters in STR. This may be different |
480 | than the memory size of the string storage. */ | |
3ee86942 MV |
481 | size_t |
482 | scm_i_string_length (SCM str) | |
0f2d19dd | 483 | { |
3ee86942 | 484 | return STRING_LENGTH (str); |
0f2d19dd JB |
485 | } |
486 | ||
50b1996f MG |
487 | /* True if the string is 'narrow', meaning it has a 8-bit Latin-1 |
488 | encoding. False if it is 'wide', having a 32-bit UCS-4 | |
489 | encoding. */ | |
9c44cd45 MG |
490 | int |
491 | scm_i_is_narrow_string (SCM str) | |
492 | { | |
49d09292 MW |
493 | if (IS_SH_STRING (str)) |
494 | str = SH_STRING_STRING (str); | |
495 | ||
9c44cd45 MG |
496 | return !STRINGBUF_WIDE (STRING_STRINGBUF (str)); |
497 | } | |
498 | ||
587a3355 MG |
499 | /* Try to coerce a string to be narrow. It if is narrow already, do |
500 | nothing. If it is wide, shrink it to narrow if none of its | |
501 | characters are above 0xFF. Return true if the string is narrow or | |
502 | was made to be narrow. */ | |
503 | int | |
504 | scm_i_try_narrow_string (SCM str) | |
505 | { | |
49d09292 MW |
506 | if (IS_SH_STRING (str)) |
507 | str = SH_STRING_STRING (str); | |
508 | ||
ba54a202 | 509 | SET_STRING_STRINGBUF (str, narrow_stringbuf (STRING_STRINGBUF (str))); |
587a3355 MG |
510 | |
511 | return scm_i_is_narrow_string (str); | |
512 | } | |
513 | ||
100e20c7 LC |
514 | /* Return a pointer to the raw data of the string, which can be either Latin-1 |
515 | or UCS-4 encoded data, depending on `scm_i_is_narrow_string (STR)'. */ | |
516 | const void * | |
517 | scm_i_string_data (SCM str) | |
518 | { | |
519 | SCM buf; | |
520 | size_t start; | |
521 | const char *data; | |
522 | ||
523 | get_str_buf_start (&str, &buf, &start); | |
524 | ||
525 | data = STRINGBUF_CONTENTS (buf); | |
526 | data += start * (scm_i_is_narrow_string (str) ? 1 : 4); | |
527 | ||
528 | return data; | |
529 | } | |
530 | ||
50b1996f MG |
531 | /* Returns a pointer to the 8-bit Latin-1 encoded character array of |
532 | STR. */ | |
3ee86942 MV |
533 | const char * |
534 | scm_i_string_chars (SCM str) | |
535 | { | |
536 | SCM buf; | |
e1b29f6a MV |
537 | size_t start; |
538 | get_str_buf_start (&str, &buf, &start); | |
9c44cd45 | 539 | if (scm_i_is_narrow_string (str)) |
f59cf998 | 540 | return (const char *) STRINGBUF_CHARS (buf) + start; |
9c44cd45 MG |
541 | else |
542 | scm_misc_error (NULL, "Invalid read access of chars of wide string: ~s", | |
543 | scm_list_1 (str)); | |
544 | return NULL; | |
3ee86942 | 545 | } |
b00418df | 546 | |
50b1996f MG |
547 | /* Returns a pointer to the 32-bit UCS-4 encoded character array of |
548 | STR. */ | |
9c44cd45 MG |
549 | const scm_t_wchar * |
550 | scm_i_string_wide_chars (SCM str) | |
551 | { | |
552 | SCM buf; | |
553 | size_t start; | |
554 | ||
555 | get_str_buf_start (&str, &buf, &start); | |
556 | if (!scm_i_is_narrow_string (str)) | |
f59cf998 | 557 | return (const scm_t_wchar *) STRINGBUF_WIDE_CHARS (buf) + start; |
9c44cd45 MG |
558 | else |
559 | scm_misc_error (NULL, "Invalid read access of chars of narrow string: ~s", | |
560 | scm_list_1 (str)); | |
561 | } | |
562 | ||
563 | /* If the buffer in ORIG_STR is shared, copy ORIG_STR's characters to | |
564 | a new string buffer, so that it can be modified without modifying | |
50b1996f MG |
565 | other strings. Also, lock the string mutex. Later, one must call |
566 | scm_i_string_stop_writing to unlock the mutex. */ | |
9c44cd45 MG |
567 | SCM |
568 | scm_i_string_start_writing (SCM orig_str) | |
b00418df | 569 | { |
ed35de72 | 570 | SCM buf, str = orig_str; |
e1b29f6a | 571 | size_t start; |
ed35de72 | 572 | |
e1b29f6a | 573 | get_str_buf_start (&str, &buf, &start); |
ed35de72 MV |
574 | if (IS_RO_STRING (str)) |
575 | scm_misc_error (NULL, "string is read-only: ~s", scm_list_1 (orig_str)); | |
576 | ||
9de87eea | 577 | scm_i_pthread_mutex_lock (&stringbuf_write_mutex); |
3ee86942 MV |
578 | if (STRINGBUF_SHARED (buf)) |
579 | { | |
9c44cd45 | 580 | /* Clone the stringbuf. */ |
3ee86942 MV |
581 | size_t len = STRING_LENGTH (str); |
582 | SCM new_buf; | |
583 | ||
9de87eea | 584 | scm_i_pthread_mutex_unlock (&stringbuf_write_mutex); |
3ee86942 | 585 | |
9c44cd45 MG |
586 | if (scm_i_is_narrow_string (str)) |
587 | { | |
588 | new_buf = make_stringbuf (len); | |
589 | memcpy (STRINGBUF_CHARS (new_buf), | |
590 | STRINGBUF_CHARS (buf) + STRING_START (str), len); | |
591 | ||
592 | } | |
593 | else | |
594 | { | |
595 | new_buf = make_wide_stringbuf (len); | |
596 | u32_cpy ((scm_t_uint32 *) STRINGBUF_WIDE_CHARS (new_buf), | |
597 | (scm_t_uint32 *) (STRINGBUF_WIDE_CHARS (buf) | |
598 | + STRING_START (str)), len); | |
599 | } | |
3ee86942 | 600 | |
3ee86942 MV |
601 | SET_STRING_STRINGBUF (str, new_buf); |
602 | start -= STRING_START (str); | |
902578f1 LC |
603 | |
604 | /* FIXME: The following operations are not atomic, so other threads | |
605 | looking at STR may see an inconsistent state. Nevertheless it can't | |
606 | hurt much since (i) accessing STR while it is being mutated can't | |
607 | yield a crash, and (ii) concurrent accesses to STR should be | |
608 | protected by a mutex at the application level. The latter may not | |
609 | apply when STR != ORIG_STR, though. */ | |
3ee86942 | 610 | SET_STRING_START (str, 0); |
902578f1 | 611 | SET_STRING_STRINGBUF (str, new_buf); |
3ee86942 MV |
612 | |
613 | buf = new_buf; | |
614 | ||
9de87eea | 615 | scm_i_pthread_mutex_lock (&stringbuf_write_mutex); |
3ee86942 | 616 | } |
9c44cd45 MG |
617 | return orig_str; |
618 | } | |
3ee86942 | 619 | |
50b1996f | 620 | /* Return a pointer to the 8-bit Latin-1 chars of a string. */ |
9c44cd45 MG |
621 | char * |
622 | scm_i_string_writable_chars (SCM str) | |
623 | { | |
624 | SCM buf; | |
625 | size_t start; | |
3ee86942 | 626 | |
9c44cd45 MG |
627 | get_str_buf_start (&str, &buf, &start); |
628 | if (scm_i_is_narrow_string (str)) | |
f59cf998 | 629 | return (char *) STRINGBUF_CHARS (buf) + start; |
9c44cd45 MG |
630 | else |
631 | scm_misc_error (NULL, "Invalid write access of chars of wide string: ~s", | |
632 | scm_list_1 (str)); | |
633 | return NULL; | |
b00418df DH |
634 | } |
635 | ||
50b1996f | 636 | /* Return a pointer to the UCS-4 codepoints of a string. */ |
9c44cd45 MG |
637 | static scm_t_wchar * |
638 | scm_i_string_writable_wide_chars (SCM str) | |
639 | { | |
640 | SCM buf; | |
641 | size_t start; | |
642 | ||
643 | get_str_buf_start (&str, &buf, &start); | |
644 | if (!scm_i_is_narrow_string (str)) | |
645 | return STRINGBUF_WIDE_CHARS (buf) + start; | |
646 | else | |
1c7b216f | 647 | scm_misc_error (NULL, "Invalid write access of chars of narrow string: ~s", |
9c44cd45 | 648 | scm_list_1 (str)); |
b00418df DH |
649 | } |
650 | ||
50b1996f MG |
651 | /* Unlock the string mutex that was locked when |
652 | scm_i_string_start_writing was called. */ | |
3ee86942 MV |
653 | void |
654 | scm_i_string_stop_writing (void) | |
655 | { | |
9de87eea | 656 | scm_i_pthread_mutex_unlock (&stringbuf_write_mutex); |
3ee86942 | 657 | } |
b00418df | 658 | |
50b1996f | 659 | /* Return the Xth character of STR as a UCS-4 codepoint. */ |
9c44cd45 MG |
660 | scm_t_wchar |
661 | scm_i_string_ref (SCM str, size_t x) | |
662 | { | |
663 | if (scm_i_is_narrow_string (str)) | |
664 | return (scm_t_wchar) (unsigned char) (scm_i_string_chars (str)[x]); | |
665 | else | |
666 | return scm_i_string_wide_chars (str)[x]; | |
667 | } | |
668 | ||
889975e5 MG |
669 | /* Returns index+1 of the first char in STR that matches C, or |
670 | 0 if the char is not found. */ | |
671 | int | |
672 | scm_i_string_contains_char (SCM str, char ch) | |
673 | { | |
674 | size_t i; | |
675 | size_t len = scm_i_string_length (str); | |
676 | ||
677 | i = 0; | |
678 | if (scm_i_is_narrow_string (str)) | |
679 | { | |
680 | while (i < len) | |
681 | { | |
682 | if (scm_i_string_chars (str)[i] == ch) | |
683 | return i+1; | |
684 | i++; | |
685 | } | |
686 | } | |
687 | else | |
688 | { | |
689 | while (i < len) | |
690 | { | |
691 | if (scm_i_string_wide_chars (str)[i] | |
692 | == (unsigned char) ch) | |
693 | return i+1; | |
694 | i++; | |
695 | } | |
696 | } | |
697 | return 0; | |
698 | } | |
699 | ||
3f47e526 MG |
700 | int |
701 | scm_i_string_strcmp (SCM sstr, size_t start_x, const char *cstr) | |
702 | { | |
703 | if (scm_i_is_narrow_string (sstr)) | |
704 | { | |
705 | const char *a = scm_i_string_chars (sstr) + start_x; | |
706 | const char *b = cstr; | |
707 | return strncmp (a, b, strlen(b)); | |
708 | } | |
709 | else | |
710 | { | |
711 | size_t i; | |
712 | const scm_t_wchar *a = scm_i_string_wide_chars (sstr) + start_x; | |
713 | const char *b = cstr; | |
714 | for (i = 0; i < strlen (b); i++) | |
715 | { | |
716 | if (a[i] != (unsigned char) b[i]) | |
717 | return 1; | |
718 | } | |
719 | } | |
720 | return 0; | |
721 | } | |
722 | ||
50b1996f | 723 | /* Set the Pth character of STR to UCS-4 codepoint CHR. */ |
9c44cd45 MG |
724 | void |
725 | scm_i_string_set_x (SCM str, size_t p, scm_t_wchar chr) | |
726 | { | |
49d09292 MW |
727 | if (IS_SH_STRING (str)) |
728 | { | |
729 | p += STRING_START (str); | |
730 | str = SH_STRING_STRING (str); | |
731 | } | |
732 | ||
9c44cd45 | 733 | if (chr > 0xFF && scm_i_is_narrow_string (str)) |
ba54a202 | 734 | SET_STRING_STRINGBUF (str, wide_stringbuf (STRING_STRINGBUF (str))); |
9c44cd45 MG |
735 | |
736 | if (scm_i_is_narrow_string (str)) | |
737 | { | |
738 | char *dst = scm_i_string_writable_chars (str); | |
587a3355 | 739 | dst[p] = chr; |
9c44cd45 MG |
740 | } |
741 | else | |
742 | { | |
743 | scm_t_wchar *dst = scm_i_string_writable_wide_chars (str); | |
744 | dst[p] = chr; | |
745 | } | |
746 | } | |
747 | ||
ba54a202 | 748 | \f |
3ee86942 | 749 | /* Symbols. |
587a3355 | 750 | |
3ee86942 MV |
751 | Basic symbol creation and accessing is done here, the rest is in |
752 | symbols.[hc]. This has been done to keep stringbufs and the | |
753 | internals of strings and string-like objects confined to this file. | |
754 | */ | |
755 | ||
756 | #define SYMBOL_STRINGBUF SCM_CELL_OBJECT_1 | |
757 | ||
758 | SCM | |
6869328b MV |
759 | scm_i_make_symbol (SCM name, scm_t_bits flags, |
760 | unsigned long hash, SCM props) | |
3ee86942 MV |
761 | { |
762 | SCM buf; | |
763 | size_t start = STRING_START (name); | |
764 | size_t length = STRING_LENGTH (name); | |
765 | ||
766 | if (IS_SH_STRING (name)) | |
767 | { | |
768 | name = SH_STRING_STRING (name); | |
769 | start += STRING_START (name); | |
770 | } | |
1a4d7653 | 771 | buf = STRING_STRINGBUF (name); |
3ee86942 MV |
772 | |
773 | if (start == 0 && length == STRINGBUF_LENGTH (buf)) | |
774 | { | |
775 | /* reuse buf. */ | |
9de87eea | 776 | scm_i_pthread_mutex_lock (&stringbuf_write_mutex); |
3ee86942 | 777 | SET_STRINGBUF_SHARED (buf); |
9de87eea | 778 | scm_i_pthread_mutex_unlock (&stringbuf_write_mutex); |
3ee86942 MV |
779 | } |
780 | else | |
781 | { | |
782 | /* make new buf. */ | |
9c44cd45 MG |
783 | if (scm_i_is_narrow_string (name)) |
784 | { | |
785 | SCM new_buf = make_stringbuf (length); | |
786 | memcpy (STRINGBUF_CHARS (new_buf), | |
787 | STRINGBUF_CHARS (buf) + start, length); | |
788 | buf = new_buf; | |
789 | } | |
790 | else | |
791 | { | |
792 | SCM new_buf = make_wide_stringbuf (length); | |
793 | u32_cpy ((scm_t_uint32 *) STRINGBUF_WIDE_CHARS (new_buf), | |
794 | (scm_t_uint32 *) STRINGBUF_WIDE_CHARS (buf) + start, | |
795 | length); | |
796 | buf = new_buf; | |
797 | } | |
3ee86942 | 798 | } |
6869328b | 799 | return scm_double_cell (scm_tc7_symbol | flags, SCM_UNPACK (buf), |
3ee86942 MV |
800 | (scm_t_bits) hash, SCM_UNPACK (props)); |
801 | } | |
802 | ||
fd0a5bbc HWN |
803 | SCM |
804 | scm_i_c_make_symbol (const char *name, size_t len, | |
805 | scm_t_bits flags, unsigned long hash, SCM props) | |
806 | { | |
807 | SCM buf = make_stringbuf (len); | |
808 | memcpy (STRINGBUF_CHARS (buf), name, len); | |
809 | ||
65619ebe AW |
810 | return scm_double_cell (scm_tc7_symbol | flags, SCM_UNPACK (buf), |
811 | (scm_t_bits) hash, SCM_UNPACK (props)); | |
fd0a5bbc HWN |
812 | } |
813 | ||
50b1996f MG |
814 | /* Returns the number of characters in SYM. This may be different |
815 | from the memory size of SYM. */ | |
3ee86942 MV |
816 | size_t |
817 | scm_i_symbol_length (SCM sym) | |
0f2d19dd | 818 | { |
3ee86942 | 819 | return STRINGBUF_LENGTH (SYMBOL_STRINGBUF (sym)); |
0f2d19dd JB |
820 | } |
821 | ||
071bb6a8 LC |
822 | size_t |
823 | scm_c_symbol_length (SCM sym) | |
824 | #define FUNC_NAME "scm_c_symbol_length" | |
825 | { | |
826 | SCM_VALIDATE_SYMBOL (1, sym); | |
827 | ||
828 | return STRINGBUF_LENGTH (SYMBOL_STRINGBUF (sym)); | |
829 | } | |
830 | #undef FUNC_NAME | |
831 | ||
50b1996f MG |
832 | /* True if the name of SYM is stored as a Latin-1 encoded string. |
833 | False if it is stored as a 32-bit UCS-4-encoded string. */ | |
9c44cd45 MG |
834 | int |
835 | scm_i_is_narrow_symbol (SCM sym) | |
836 | { | |
837 | SCM buf; | |
838 | ||
839 | buf = SYMBOL_STRINGBUF (sym); | |
840 | return !STRINGBUF_WIDE (buf); | |
841 | } | |
842 | ||
50b1996f MG |
843 | /* Returns a pointer to the 8-bit Latin-1 encoded character array that |
844 | contains the name of SYM. */ | |
3ee86942 MV |
845 | const char * |
846 | scm_i_symbol_chars (SCM sym) | |
847 | { | |
9c44cd45 MG |
848 | SCM buf; |
849 | ||
850 | buf = SYMBOL_STRINGBUF (sym); | |
851 | if (!STRINGBUF_WIDE (buf)) | |
f59cf998 | 852 | return (const char *) STRINGBUF_CHARS (buf); |
9c44cd45 MG |
853 | else |
854 | scm_misc_error (NULL, "Invalid access of chars of a wide symbol ~S", | |
855 | scm_list_1 (sym)); | |
856 | } | |
857 | ||
50b1996f MG |
858 | /* Return a pointer to the 32-bit UCS-4-encoded character array of a |
859 | symbol's name. */ | |
9c44cd45 MG |
860 | const scm_t_wchar * |
861 | scm_i_symbol_wide_chars (SCM sym) | |
862 | { | |
863 | SCM buf; | |
864 | ||
865 | buf = SYMBOL_STRINGBUF (sym); | |
866 | if (STRINGBUF_WIDE (buf)) | |
f59cf998 | 867 | return (const scm_t_wchar *) STRINGBUF_WIDE_CHARS (buf); |
9c44cd45 MG |
868 | else |
869 | scm_misc_error (NULL, "Invalid access of chars of a narrow symbol ~S", | |
870 | scm_list_1 (sym)); | |
3ee86942 | 871 | } |
1cc91f1b | 872 | |
be54b15d | 873 | SCM |
3ee86942 | 874 | scm_i_symbol_substring (SCM sym, size_t start, size_t end) |
be54b15d | 875 | { |
3ee86942 | 876 | SCM buf = SYMBOL_STRINGBUF (sym); |
9de87eea | 877 | scm_i_pthread_mutex_lock (&stringbuf_write_mutex); |
3ee86942 | 878 | SET_STRINGBUF_SHARED (buf); |
9de87eea | 879 | scm_i_pthread_mutex_unlock (&stringbuf_write_mutex); |
fd2b17b9 | 880 | return scm_double_cell (RO_STRING_TAG, SCM_UNPACK (buf), |
3ee86942 MV |
881 | (scm_t_bits)start, (scm_t_bits) end - start); |
882 | } | |
be54b15d | 883 | |
50b1996f | 884 | /* Returns the Xth character of symbol SYM as a UCS-4 codepoint. */ |
9c44cd45 MG |
885 | scm_t_wchar |
886 | scm_i_symbol_ref (SCM sym, size_t x) | |
887 | { | |
888 | if (scm_i_is_narrow_symbol (sym)) | |
889 | return (scm_t_wchar) (unsigned char) (scm_i_symbol_chars (sym)[x]); | |
890 | else | |
891 | return scm_i_symbol_wide_chars (sym)[x]; | |
892 | } | |
893 | ||
3ee86942 MV |
894 | /* Debugging |
895 | */ | |
be54b15d | 896 | |
6ce6923b MG |
897 | SCM_DEFINE (scm_sys_string_dump, "%string-dump", 1, 0, 0, (SCM str), |
898 | "Returns an association list containing debugging information\n" | |
899 | "for @var{str}. The association list has the following entries." | |
900 | "@table @code\n" | |
901 | "@item string\n" | |
902 | "The string itself.\n" | |
903 | "@item start\n" | |
904 | "The start index of the string into its stringbuf\n" | |
905 | "@item length\n" | |
906 | "The length of the string\n" | |
907 | "@item shared\n" | |
908 | "If this string is a substring, it returns its parent string.\n" | |
909 | "Otherwise, it returns @code{#f}\n" | |
88ed5759 MG |
910 | "@item read-only\n" |
911 | "@code{#t} if the string is read-only\n" | |
6ce6923b MG |
912 | "@item stringbuf-chars\n" |
913 | "A new string containing this string's stringbuf's characters\n" | |
914 | "@item stringbuf-length\n" | |
915 | "The number of characters in this stringbuf\n" | |
916 | "@item stringbuf-shared\n" | |
917 | "@code{#t} if this stringbuf is shared\n" | |
6ce6923b MG |
918 | "@item stringbuf-wide\n" |
919 | "@code{#t} if this stringbuf's characters are stored in a\n" | |
920 | "32-bit buffer, or @code{#f} if they are stored in an 8-bit\n" | |
921 | "buffer\n" | |
922 | "@end table") | |
3ee86942 MV |
923 | #define FUNC_NAME s_scm_sys_string_dump |
924 | { | |
ba54a202 | 925 | SCM e1, e2, e3, e4, e5, e6, e7, e8, e9; |
6ce6923b | 926 | SCM buf; |
3ee86942 | 927 | SCM_VALIDATE_STRING (1, str); |
6ce6923b MG |
928 | |
929 | /* String info */ | |
4a655e50 | 930 | e1 = scm_cons (scm_from_latin1_symbol ("string"), |
6ce6923b | 931 | str); |
4a655e50 | 932 | e2 = scm_cons (scm_from_latin1_symbol ("start"), |
6ce6923b | 933 | scm_from_size_t (STRING_START (str))); |
4a655e50 | 934 | e3 = scm_cons (scm_from_latin1_symbol ("length"), |
6ce6923b MG |
935 | scm_from_size_t (STRING_LENGTH (str))); |
936 | ||
3ee86942 MV |
937 | if (IS_SH_STRING (str)) |
938 | { | |
4a655e50 | 939 | e4 = scm_cons (scm_from_latin1_symbol ("shared"), |
6ce6923b MG |
940 | SH_STRING_STRING (str)); |
941 | buf = STRING_STRINGBUF (SH_STRING_STRING (str)); | |
3ee86942 MV |
942 | } |
943 | else | |
944 | { | |
4a655e50 | 945 | e4 = scm_cons (scm_from_latin1_symbol ("shared"), |
6ce6923b MG |
946 | SCM_BOOL_F); |
947 | buf = STRING_STRINGBUF (str); | |
3ee86942 | 948 | } |
9c44cd45 | 949 | |
88ed5759 | 950 | if (IS_RO_STRING (str)) |
4a655e50 | 951 | e5 = scm_cons (scm_from_latin1_symbol ("read-only"), |
88ed5759 MG |
952 | SCM_BOOL_T); |
953 | else | |
4a655e50 | 954 | e5 = scm_cons (scm_from_latin1_symbol ("read-only"), |
88ed5759 | 955 | SCM_BOOL_F); |
587a3355 | 956 | |
6ce6923b | 957 | /* Stringbuf info */ |
6ce6923b MG |
958 | if (!STRINGBUF_WIDE (buf)) |
959 | { | |
960 | size_t len = STRINGBUF_LENGTH (buf); | |
961 | char *cbuf; | |
190d4b0d | 962 | SCM sbc = scm_i_make_string (len, &cbuf, 0); |
6ce6923b | 963 | memcpy (cbuf, STRINGBUF_CHARS (buf), len); |
4a655e50 | 964 | e6 = scm_cons (scm_from_latin1_symbol ("stringbuf-chars"), |
6ce6923b | 965 | sbc); |
3ee86942 | 966 | } |
6ce6923b MG |
967 | else |
968 | { | |
969 | size_t len = STRINGBUF_LENGTH (buf); | |
970 | scm_t_wchar *cbuf; | |
190d4b0d | 971 | SCM sbc = scm_i_make_wide_string (len, &cbuf, 0); |
6ce6923b MG |
972 | u32_cpy ((scm_t_uint32 *) cbuf, |
973 | (scm_t_uint32 *) STRINGBUF_WIDE_CHARS (buf), len); | |
4a655e50 | 974 | e6 = scm_cons (scm_from_latin1_symbol ("stringbuf-chars"), |
6ce6923b MG |
975 | sbc); |
976 | } | |
4a655e50 | 977 | e7 = scm_cons (scm_from_latin1_symbol ("stringbuf-length"), |
6ce6923b MG |
978 | scm_from_size_t (STRINGBUF_LENGTH (buf))); |
979 | if (STRINGBUF_SHARED (buf)) | |
4a655e50 | 980 | e8 = scm_cons (scm_from_latin1_symbol ("stringbuf-shared"), |
6ce6923b MG |
981 | SCM_BOOL_T); |
982 | else | |
4a655e50 | 983 | e8 = scm_cons (scm_from_latin1_symbol ("stringbuf-shared"), |
6ce6923b | 984 | SCM_BOOL_F); |
6ce6923b | 985 | if (STRINGBUF_WIDE (buf)) |
4a655e50 | 986 | e9 = scm_cons (scm_from_latin1_symbol ("stringbuf-wide"), |
ba54a202 | 987 | SCM_BOOL_T); |
6ce6923b | 988 | else |
4a655e50 | 989 | e9 = scm_cons (scm_from_latin1_symbol ("stringbuf-wide"), |
ba54a202 | 990 | SCM_BOOL_F); |
6ce6923b | 991 | |
ba54a202 | 992 | return scm_list_n (e1, e2, e3, e4, e5, e6, e7, e8, e9, SCM_UNDEFINED); |
3ee86942 MV |
993 | } |
994 | #undef FUNC_NAME | |
995 | ||
6ce6923b MG |
996 | SCM_DEFINE (scm_sys_symbol_dump, "%symbol-dump", 1, 0, 0, (SCM sym), |
997 | "Returns an association list containing debugging information\n" | |
998 | "for @var{sym}. The association list has the following entries." | |
999 | "@table @code\n" | |
1000 | "@item symbol\n" | |
1001 | "The symbol itself\n" | |
1002 | "@item hash\n" | |
1003 | "Its hash value\n" | |
88ed5759 MG |
1004 | "@item interned\n" |
1005 | "@code{#t} if it is an interned symbol\n" | |
6ce6923b MG |
1006 | "@item stringbuf-chars\n" |
1007 | "A new string containing this symbols's stringbuf's characters\n" | |
1008 | "@item stringbuf-length\n" | |
1009 | "The number of characters in this stringbuf\n" | |
1010 | "@item stringbuf-shared\n" | |
1011 | "@code{#t} if this stringbuf is shared\n" | |
6ce6923b MG |
1012 | "@item stringbuf-wide\n" |
1013 | "@code{#t} if this stringbuf's characters are stored in a\n" | |
1014 | "32-bit buffer, or @code{#f} if they are stored in an 8-bit\n" | |
1015 | "buffer\n" | |
1016 | "@end table") | |
3ee86942 MV |
1017 | #define FUNC_NAME s_scm_sys_symbol_dump |
1018 | { | |
ba54a202 | 1019 | SCM e1, e2, e3, e4, e5, e6, e7; |
6ce6923b | 1020 | SCM buf; |
3ee86942 | 1021 | SCM_VALIDATE_SYMBOL (1, sym); |
4a655e50 | 1022 | e1 = scm_cons (scm_from_latin1_symbol ("symbol"), |
6ce6923b | 1023 | sym); |
4a655e50 | 1024 | e2 = scm_cons (scm_from_latin1_symbol ("hash"), |
6ce6923b | 1025 | scm_from_ulong (scm_i_symbol_hash (sym))); |
4a655e50 | 1026 | e3 = scm_cons (scm_from_latin1_symbol ("interned"), |
88ed5759 | 1027 | scm_symbol_interned_p (sym)); |
6ce6923b MG |
1028 | buf = SYMBOL_STRINGBUF (sym); |
1029 | ||
1030 | /* Stringbuf info */ | |
6ce6923b MG |
1031 | if (!STRINGBUF_WIDE (buf)) |
1032 | { | |
1033 | size_t len = STRINGBUF_LENGTH (buf); | |
1034 | char *cbuf; | |
190d4b0d | 1035 | SCM sbc = scm_i_make_string (len, &cbuf, 0); |
6ce6923b | 1036 | memcpy (cbuf, STRINGBUF_CHARS (buf), len); |
4a655e50 | 1037 | e4 = scm_cons (scm_from_latin1_symbol ("stringbuf-chars"), |
6ce6923b MG |
1038 | sbc); |
1039 | } | |
9c44cd45 | 1040 | else |
6ce6923b MG |
1041 | { |
1042 | size_t len = STRINGBUF_LENGTH (buf); | |
1043 | scm_t_wchar *cbuf; | |
190d4b0d | 1044 | SCM sbc = scm_i_make_wide_string (len, &cbuf, 0); |
6ce6923b MG |
1045 | u32_cpy ((scm_t_uint32 *) cbuf, |
1046 | (scm_t_uint32 *) STRINGBUF_WIDE_CHARS (buf), len); | |
4a655e50 | 1047 | e4 = scm_cons (scm_from_latin1_symbol ("stringbuf-chars"), |
6ce6923b MG |
1048 | sbc); |
1049 | } | |
4a655e50 | 1050 | e5 = scm_cons (scm_from_latin1_symbol ("stringbuf-length"), |
6ce6923b MG |
1051 | scm_from_size_t (STRINGBUF_LENGTH (buf))); |
1052 | if (STRINGBUF_SHARED (buf)) | |
4a655e50 | 1053 | e6 = scm_cons (scm_from_latin1_symbol ("stringbuf-shared"), |
6ce6923b MG |
1054 | SCM_BOOL_T); |
1055 | else | |
4a655e50 | 1056 | e6 = scm_cons (scm_from_latin1_symbol ("stringbuf-shared"), |
6ce6923b | 1057 | SCM_BOOL_F); |
6ce6923b | 1058 | if (STRINGBUF_WIDE (buf)) |
4a655e50 | 1059 | e7 = scm_cons (scm_from_latin1_symbol ("stringbuf-wide"), |
6ce6923b MG |
1060 | SCM_BOOL_T); |
1061 | else | |
4a655e50 | 1062 | e7 = scm_cons (scm_from_latin1_symbol ("stringbuf-wide"), |
6ce6923b | 1063 | SCM_BOOL_F); |
ba54a202 | 1064 | return scm_list_n (e1, e2, e3, e4, e5, e6, e7, SCM_UNDEFINED); |
6ce6923b | 1065 | |
3ee86942 MV |
1066 | } |
1067 | #undef FUNC_NAME | |
1068 | ||
56a3dcd4 | 1069 | #ifdef SCM_STRING_LENGTH_HISTOGRAM |
6ce6923b | 1070 | |
9c44cd45 | 1071 | SCM_DEFINE (scm_sys_stringbuf_hist, "%stringbuf-hist", 0, 0, 0, (void), "") |
e1b29f6a | 1072 | #define FUNC_NAME s_scm_sys_stringbuf_hist |
3ee86942 MV |
1073 | { |
1074 | int i; | |
1075 | for (i = 0; i < 1000; i++) | |
1076 | if (lenhist[i]) | |
1077 | fprintf (stderr, " %3d: %u\n", i, lenhist[i]); | |
1078 | fprintf (stderr, ">999: %u\n", lenhist[1000]); | |
1079 | return SCM_UNSPECIFIED; | |
be54b15d DH |
1080 | } |
1081 | #undef FUNC_NAME | |
1082 | ||
3ee86942 MV |
1083 | #endif |
1084 | ||
1085 | \f | |
1086 | ||
1087 | SCM_DEFINE (scm_string_p, "string?", 1, 0, 0, | |
1088 | (SCM obj), | |
1089 | "Return @code{#t} if @var{obj} is a string, else @code{#f}.") | |
1090 | #define FUNC_NAME s_scm_string_p | |
1091 | { | |
1092 | return scm_from_bool (IS_STRING (obj)); | |
1093 | } | |
1094 | #undef FUNC_NAME | |
1095 | ||
1096 | ||
1097 | SCM_REGISTER_PROC (s_scm_list_to_string, "list->string", 1, 0, 0, scm_string); | |
1098 | ||
1099 | SCM_DEFINE (scm_string, "string", 0, 0, 1, | |
1100 | (SCM chrs), | |
1101 | "@deffnx {Scheme Procedure} list->string chrs\n" | |
1102 | "Return a newly allocated string composed of the arguments,\n" | |
1103 | "@var{chrs}.") | |
1104 | #define FUNC_NAME s_scm_string | |
1105 | { | |
9aa27c1a | 1106 | SCM result = SCM_BOOL_F; |
9c44cd45 | 1107 | SCM rest; |
3ee86942 | 1108 | size_t len; |
9c44cd45 MG |
1109 | size_t p = 0; |
1110 | long i; | |
9aa27c1a | 1111 | int wide = 0; |
3ee86942 | 1112 | |
9c44cd45 MG |
1113 | /* Verify that this is a list of chars. */ |
1114 | i = scm_ilength (chrs); | |
3c7cf7f5 | 1115 | SCM_ASSERT (i >= 0, chrs, SCM_ARG1, FUNC_NAME); |
3ee86942 | 1116 | |
9c44cd45 MG |
1117 | len = (size_t) i; |
1118 | rest = chrs; | |
3ee86942 | 1119 | |
9c44cd45 | 1120 | while (len > 0 && scm_is_pair (rest)) |
3ee86942 | 1121 | { |
9c44cd45 | 1122 | SCM elt = SCM_CAR (rest); |
3ee86942 | 1123 | SCM_VALIDATE_CHAR (SCM_ARGn, elt); |
9aa27c1a MG |
1124 | if (SCM_CHAR (elt) > 0xFF) |
1125 | wide = 1; | |
9c44cd45 MG |
1126 | rest = SCM_CDR (rest); |
1127 | len--; | |
1128 | scm_remember_upto_here_1 (elt); | |
1129 | } | |
1130 | ||
1131 | /* Construct a string containing this list of chars. */ | |
1132 | len = (size_t) i; | |
1133 | rest = chrs; | |
1134 | ||
9aa27c1a | 1135 | if (wide == 0) |
9c44cd45 | 1136 | { |
56a3dcd4 LC |
1137 | char *buf; |
1138 | ||
190d4b0d | 1139 | result = scm_i_make_string (len, NULL, 0); |
9aa27c1a | 1140 | result = scm_i_string_start_writing (result); |
56a3dcd4 | 1141 | buf = scm_i_string_writable_chars (result); |
9aa27c1a MG |
1142 | while (len > 0 && scm_is_pair (rest)) |
1143 | { | |
1144 | SCM elt = SCM_CAR (rest); | |
1145 | buf[p] = (unsigned char) SCM_CHAR (elt); | |
1146 | p++; | |
1147 | rest = SCM_CDR (rest); | |
1148 | len--; | |
1149 | scm_remember_upto_here_1 (elt); | |
1150 | } | |
1151 | } | |
1152 | else | |
1153 | { | |
56a3dcd4 LC |
1154 | scm_t_wchar *buf; |
1155 | ||
190d4b0d | 1156 | result = scm_i_make_wide_string (len, NULL, 0); |
9aa27c1a | 1157 | result = scm_i_string_start_writing (result); |
56a3dcd4 | 1158 | buf = scm_i_string_writable_wide_chars (result); |
9aa27c1a MG |
1159 | while (len > 0 && scm_is_pair (rest)) |
1160 | { | |
1161 | SCM elt = SCM_CAR (rest); | |
1162 | buf[p] = SCM_CHAR (elt); | |
1163 | p++; | |
1164 | rest = SCM_CDR (rest); | |
1165 | len--; | |
1166 | scm_remember_upto_here_1 (elt); | |
1167 | } | |
3ee86942 | 1168 | } |
9c44cd45 MG |
1169 | scm_i_string_stop_writing (); |
1170 | ||
3ee86942 MV |
1171 | if (len > 0) |
1172 | scm_misc_error (NULL, "list changed while constructing string", SCM_EOL); | |
9c44cd45 | 1173 | if (!scm_is_null (rest)) |
3ee86942 MV |
1174 | scm_wrong_type_arg_msg (NULL, 0, chrs, "proper list"); |
1175 | ||
1176 | return result; | |
1177 | } | |
1178 | #undef FUNC_NAME | |
be54b15d | 1179 | |
3b3b36dd | 1180 | SCM_DEFINE (scm_make_string, "make-string", 1, 1, 0, |
6fa73e72 | 1181 | (SCM k, SCM chr), |
0d26a824 MG |
1182 | "Return a newly allocated string of\n" |
1183 | "length @var{k}. If @var{chr} is given, then all elements of\n" | |
1184 | "the string are initialized to @var{chr}, otherwise the contents\n" | |
b7e64f8b | 1185 | "of the string are all set to @code{#\nul}.") |
1bbd0b84 | 1186 | #define FUNC_NAME s_scm_make_string |
0f2d19dd | 1187 | { |
3ee86942 MV |
1188 | return scm_c_make_string (scm_to_size_t (k), chr); |
1189 | } | |
1190 | #undef FUNC_NAME | |
1191 | ||
1192 | SCM | |
1193 | scm_c_make_string (size_t len, SCM chr) | |
1194 | #define FUNC_NAME NULL | |
1195 | { | |
9c44cd45 | 1196 | size_t p; |
3ef6650d | 1197 | char *contents = NULL; |
190d4b0d | 1198 | SCM res = scm_i_make_string (len, &contents, 0); |
cb0d8be2 | 1199 | |
3ef6650d AW |
1200 | /* If no char is given, initialize string contents to NULL. */ |
1201 | if (SCM_UNBNDP (chr)) | |
1202 | memset (contents, 0, len); | |
1203 | else | |
e11e83f3 | 1204 | { |
3ee86942 | 1205 | SCM_VALIDATE_CHAR (0, chr); |
9c44cd45 MG |
1206 | res = scm_i_string_start_writing (res); |
1207 | for (p = 0; p < len; p++) | |
1208 | scm_i_string_set_x (res, p, SCM_CHAR (chr)); | |
1209 | scm_i_string_stop_writing (); | |
0f2d19dd | 1210 | } |
e11e83f3 MV |
1211 | |
1212 | return res; | |
0f2d19dd | 1213 | } |
1bbd0b84 | 1214 | #undef FUNC_NAME |
0f2d19dd | 1215 | |
3b3b36dd | 1216 | SCM_DEFINE (scm_string_length, "string-length", 1, 0, 0, |
0d26a824 MG |
1217 | (SCM string), |
1218 | "Return the number of characters in @var{string}.") | |
1bbd0b84 | 1219 | #define FUNC_NAME s_scm_string_length |
0f2d19dd | 1220 | { |
d1ca2c64 | 1221 | SCM_VALIDATE_STRING (1, string); |
3ee86942 | 1222 | return scm_from_size_t (STRING_LENGTH (string)); |
0f2d19dd | 1223 | } |
1bbd0b84 | 1224 | #undef FUNC_NAME |
0f2d19dd | 1225 | |
f8ba2bb9 | 1226 | SCM_DEFINE (scm_string_bytes_per_char, "string-bytes-per-char", 1, 0, 0, |
9c44cd45 MG |
1227 | (SCM string), |
1228 | "Return the bytes used to represent a character in @var{string}." | |
1229 | "This will return 1 or 4.") | |
f8ba2bb9 | 1230 | #define FUNC_NAME s_scm_string_bytes_per_char |
9c44cd45 MG |
1231 | { |
1232 | SCM_VALIDATE_STRING (1, string); | |
1233 | if (!scm_i_is_narrow_string (string)) | |
1234 | return scm_from_int (4); | |
1235 | ||
1236 | return scm_from_int (1); | |
1237 | } | |
1238 | #undef FUNC_NAME | |
1239 | ||
3ee86942 MV |
1240 | size_t |
1241 | scm_c_string_length (SCM string) | |
1242 | { | |
1243 | if (!IS_STRING (string)) | |
1244 | scm_wrong_type_arg_msg (NULL, 0, string, "string"); | |
1245 | return STRING_LENGTH (string); | |
1246 | } | |
1247 | ||
bd9e24b3 | 1248 | SCM_DEFINE (scm_string_ref, "string-ref", 2, 0, 0, |
6fa73e72 | 1249 | (SCM str, SCM k), |
9c44cd45 MG |
1250 | "Return character @var{k} of @var{str} using zero-origin\n" |
1251 | "indexing. @var{k} must be a valid index of @var{str}.") | |
1bbd0b84 | 1252 | #define FUNC_NAME s_scm_string_ref |
0f2d19dd | 1253 | { |
3ae3166b | 1254 | size_t len; |
a55c2b68 | 1255 | unsigned long idx; |
bd9e24b3 | 1256 | |
d1ca2c64 | 1257 | SCM_VALIDATE_STRING (1, str); |
3ae3166b LC |
1258 | |
1259 | len = scm_i_string_length (str); | |
1260 | if (SCM_LIKELY (len > 0)) | |
1261 | idx = scm_to_unsigned_integer (k, 0, len - 1); | |
1262 | else | |
1263 | scm_out_of_range (NULL, k); | |
1264 | ||
9c44cd45 MG |
1265 | if (scm_i_is_narrow_string (str)) |
1266 | return SCM_MAKE_CHAR (scm_i_string_chars (str)[idx]); | |
1267 | else | |
1268 | return SCM_MAKE_CHAR (scm_i_string_wide_chars (str)[idx]); | |
0f2d19dd | 1269 | } |
1bbd0b84 | 1270 | #undef FUNC_NAME |
0f2d19dd | 1271 | |
3ee86942 MV |
1272 | SCM |
1273 | scm_c_string_ref (SCM str, size_t p) | |
1274 | { | |
1275 | if (p >= scm_i_string_length (str)) | |
1276 | scm_out_of_range (NULL, scm_from_size_t (p)); | |
9c44cd45 MG |
1277 | if (scm_i_is_narrow_string (str)) |
1278 | return SCM_MAKE_CHAR (scm_i_string_chars (str)[p]); | |
1279 | else | |
1280 | return SCM_MAKE_CHAR (scm_i_string_wide_chars (str)[p]); | |
1281 | ||
3ee86942 | 1282 | } |
f0942910 | 1283 | |
3b3b36dd | 1284 | SCM_DEFINE (scm_string_set_x, "string-set!", 3, 0, 0, |
6fa73e72 | 1285 | (SCM str, SCM k, SCM chr), |
9c44cd45 MG |
1286 | "Store @var{chr} in element @var{k} of @var{str} and return\n" |
1287 | "an unspecified value. @var{k} must be a valid index of\n" | |
1288 | "@var{str}.") | |
1bbd0b84 | 1289 | #define FUNC_NAME s_scm_string_set_x |
0f2d19dd | 1290 | { |
3ae3166b | 1291 | size_t len; |
a55c2b68 MV |
1292 | unsigned long idx; |
1293 | ||
f0942910 | 1294 | SCM_VALIDATE_STRING (1, str); |
3ae3166b LC |
1295 | |
1296 | len = scm_i_string_length (str); | |
1297 | if (SCM_LIKELY (len > 0)) | |
1298 | idx = scm_to_unsigned_integer (k, 0, len - 1); | |
1299 | else | |
1300 | scm_out_of_range (NULL, k); | |
1301 | ||
34d19ef6 | 1302 | SCM_VALIDATE_CHAR (3, chr); |
9c44cd45 MG |
1303 | str = scm_i_string_start_writing (str); |
1304 | scm_i_string_set_x (str, idx, SCM_CHAR (chr)); | |
1305 | scm_i_string_stop_writing (); | |
1306 | ||
0f2d19dd JB |
1307 | return SCM_UNSPECIFIED; |
1308 | } | |
1bbd0b84 | 1309 | #undef FUNC_NAME |
0f2d19dd | 1310 | |
3ee86942 MV |
1311 | void |
1312 | scm_c_string_set_x (SCM str, size_t p, SCM chr) | |
1313 | { | |
1314 | if (p >= scm_i_string_length (str)) | |
1315 | scm_out_of_range (NULL, scm_from_size_t (p)); | |
9c44cd45 MG |
1316 | str = scm_i_string_start_writing (str); |
1317 | scm_i_string_set_x (str, p, SCM_CHAR (chr)); | |
1318 | scm_i_string_stop_writing (); | |
3ee86942 | 1319 | } |
0f2d19dd | 1320 | |
3b3b36dd | 1321 | SCM_DEFINE (scm_substring, "substring", 2, 1, 0, |
0d26a824 MG |
1322 | (SCM str, SCM start, SCM end), |
1323 | "Return a newly allocated string formed from the characters\n" | |
1324 | "of @var{str} beginning with index @var{start} (inclusive) and\n" | |
1325 | "ending with index @var{end} (exclusive).\n" | |
1326 | "@var{str} must be a string, @var{start} and @var{end} must be\n" | |
1327 | "exact integers satisfying:\n\n" | |
1328 | "0 <= @var{start} <= @var{end} <= (string-length @var{str}).") | |
1bbd0b84 | 1329 | #define FUNC_NAME s_scm_substring |
0f2d19dd | 1330 | { |
3ee86942 | 1331 | size_t len, from, to; |
685c0d71 | 1332 | |
d1ca2c64 | 1333 | SCM_VALIDATE_STRING (1, str); |
3ee86942 MV |
1334 | len = scm_i_string_length (str); |
1335 | from = scm_to_unsigned_integer (start, 0, len); | |
a55c2b68 | 1336 | if (SCM_UNBNDP (end)) |
3ee86942 | 1337 | to = len; |
a55c2b68 | 1338 | else |
3ee86942 MV |
1339 | to = scm_to_unsigned_integer (end, from, len); |
1340 | return scm_i_substring (str, from, to); | |
0f2d19dd | 1341 | } |
1bbd0b84 | 1342 | #undef FUNC_NAME |
0f2d19dd | 1343 | |
ed35de72 MV |
1344 | SCM_DEFINE (scm_substring_read_only, "substring/read-only", 2, 1, 0, |
1345 | (SCM str, SCM start, SCM end), | |
1346 | "Return a newly allocated string formed from the characters\n" | |
1347 | "of @var{str} beginning with index @var{start} (inclusive) and\n" | |
1348 | "ending with index @var{end} (exclusive).\n" | |
1349 | "@var{str} must be a string, @var{start} and @var{end} must be\n" | |
1350 | "exact integers satisfying:\n" | |
1351 | "\n" | |
1352 | "0 <= @var{start} <= @var{end} <= (string-length @var{str}).\n" | |
1353 | "\n" | |
1354 | "The returned string is read-only.\n") | |
1355 | #define FUNC_NAME s_scm_substring_read_only | |
1356 | { | |
1357 | size_t len, from, to; | |
1358 | ||
1359 | SCM_VALIDATE_STRING (1, str); | |
1360 | len = scm_i_string_length (str); | |
1361 | from = scm_to_unsigned_integer (start, 0, len); | |
1362 | if (SCM_UNBNDP (end)) | |
1363 | to = len; | |
1364 | else | |
1365 | to = scm_to_unsigned_integer (end, from, len); | |
1366 | return scm_i_substring_read_only (str, from, to); | |
1367 | } | |
1368 | #undef FUNC_NAME | |
1369 | ||
3ee86942 MV |
1370 | SCM_DEFINE (scm_substring_copy, "substring/copy", 2, 1, 0, |
1371 | (SCM str, SCM start, SCM end), | |
1372 | "Return a newly allocated string formed from the characters\n" | |
1373 | "of @var{str} beginning with index @var{start} (inclusive) and\n" | |
1374 | "ending with index @var{end} (exclusive).\n" | |
1375 | "@var{str} must be a string, @var{start} and @var{end} must be\n" | |
1376 | "exact integers satisfying:\n\n" | |
1377 | "0 <= @var{start} <= @var{end} <= (string-length @var{str}).") | |
1378 | #define FUNC_NAME s_scm_substring_copy | |
1379 | { | |
e1b29f6a MV |
1380 | /* For the Scheme version, START is mandatory, but for the C |
1381 | version, it is optional. See scm_string_copy in srfi-13.c for a | |
1382 | rationale. | |
1383 | */ | |
1384 | ||
1385 | size_t from, to; | |
3ee86942 MV |
1386 | |
1387 | SCM_VALIDATE_STRING (1, str); | |
e1b29f6a MV |
1388 | scm_i_get_substring_spec (scm_i_string_length (str), |
1389 | start, &from, end, &to); | |
3ee86942 MV |
1390 | return scm_i_substring_copy (str, from, to); |
1391 | } | |
1392 | #undef FUNC_NAME | |
1393 | ||
1394 | SCM_DEFINE (scm_substring_shared, "substring/shared", 2, 1, 0, | |
1395 | (SCM str, SCM start, SCM end), | |
1396 | "Return string that indirectly refers to the characters\n" | |
1397 | "of @var{str} beginning with index @var{start} (inclusive) and\n" | |
1398 | "ending with index @var{end} (exclusive).\n" | |
1399 | "@var{str} must be a string, @var{start} and @var{end} must be\n" | |
1400 | "exact integers satisfying:\n\n" | |
1401 | "0 <= @var{start} <= @var{end} <= (string-length @var{str}).") | |
1402 | #define FUNC_NAME s_scm_substring_shared | |
1403 | { | |
1404 | size_t len, from, to; | |
1405 | ||
1406 | SCM_VALIDATE_STRING (1, str); | |
1407 | len = scm_i_string_length (str); | |
1408 | from = scm_to_unsigned_integer (start, 0, len); | |
1409 | if (SCM_UNBNDP (end)) | |
1410 | to = len; | |
1411 | else | |
1412 | to = scm_to_unsigned_integer (end, from, len); | |
1413 | return scm_i_substring_shared (str, from, to); | |
1414 | } | |
1415 | #undef FUNC_NAME | |
685c0d71 | 1416 | |
3b3b36dd | 1417 | SCM_DEFINE (scm_string_append, "string-append", 0, 0, 1, |
6fa73e72 | 1418 | (SCM args), |
9c44cd45 | 1419 | "Return a newly allocated string whose characters form the\n" |
0d26a824 | 1420 | "concatenation of the given strings, @var{args}.") |
1bbd0b84 | 1421 | #define FUNC_NAME s_scm_string_append |
0f2d19dd JB |
1422 | { |
1423 | SCM res; | |
2f13a466 MW |
1424 | size_t total = 0; |
1425 | size_t len; | |
9c44cd45 | 1426 | int wide = 0; |
c829a427 | 1427 | SCM l, s; |
bd4911ef | 1428 | size_t i; |
9909c395 MG |
1429 | union |
1430 | { | |
1431 | char *narrow; | |
1432 | scm_t_wchar *wide; | |
1433 | } data; | |
af45e3b0 DH |
1434 | |
1435 | SCM_VALIDATE_REST_ARGUMENT (args); | |
9c44cd45 | 1436 | for (l = args; !scm_is_null (l); l = SCM_CDR (l)) |
c829a427 MV |
1437 | { |
1438 | s = SCM_CAR (l); | |
1439 | SCM_VALIDATE_STRING (SCM_ARGn, s); | |
2f13a466 MW |
1440 | len = scm_i_string_length (s); |
1441 | if (((size_t) -1) - total < len) | |
1442 | scm_num_overflow (s_scm_string_append); | |
1443 | total += len; | |
9c44cd45 MG |
1444 | if (!scm_i_is_narrow_string (s)) |
1445 | wide = 1; | |
c829a427 | 1446 | } |
9909c395 | 1447 | data.narrow = NULL; |
9c44cd45 | 1448 | if (!wide) |
2f13a466 | 1449 | res = scm_i_make_string (total, &data.narrow, 0); |
9c44cd45 | 1450 | else |
2f13a466 | 1451 | res = scm_i_make_wide_string (total, &data.wide, 0); |
9c44cd45 MG |
1452 | |
1453 | for (l = args; !scm_is_null (l); l = SCM_CDR (l)) | |
c829a427 | 1454 | { |
edea856c | 1455 | size_t len; |
c829a427 | 1456 | s = SCM_CAR (l); |
3ee86942 | 1457 | SCM_VALIDATE_STRING (SCM_ARGn, s); |
edea856c | 1458 | len = scm_i_string_length (s); |
2f13a466 MW |
1459 | if (len > total) |
1460 | SCM_MISC_ERROR ("list changed during string-append", SCM_EOL); | |
9c44cd45 MG |
1461 | if (!wide) |
1462 | { | |
9909c395 MG |
1463 | memcpy (data.narrow, scm_i_string_chars (s), len); |
1464 | data.narrow += len; | |
9c44cd45 MG |
1465 | } |
1466 | else | |
1467 | { | |
1468 | if (scm_i_is_narrow_string (s)) | |
1469 | { | |
2f13a466 MW |
1470 | const char *src = scm_i_string_chars (s); |
1471 | for (i = 0; i < len; i++) | |
1472 | data.wide[i] = (unsigned char) src[i]; | |
9c44cd45 MG |
1473 | } |
1474 | else | |
9909c395 | 1475 | u32_cpy ((scm_t_uint32 *) data.wide, |
9c44cd45 | 1476 | (scm_t_uint32 *) scm_i_string_wide_chars (s), len); |
9909c395 | 1477 | data.wide += len; |
9c44cd45 | 1478 | } |
2f13a466 | 1479 | total -= len; |
c829a427 MV |
1480 | scm_remember_upto_here_1 (s); |
1481 | } | |
2f13a466 MW |
1482 | if (total != 0) |
1483 | SCM_MISC_ERROR ("list changed during string-append", SCM_EOL); | |
0f2d19dd JB |
1484 | return res; |
1485 | } | |
1bbd0b84 | 1486 | #undef FUNC_NAME |
0f2d19dd | 1487 | |
24933780 | 1488 | |
a3d7d5d5 | 1489 | \f |
c62da8f8 | 1490 | /* Charset conversion error handling. */ |
a3d7d5d5 LC |
1491 | |
1492 | SCM_SYMBOL (scm_encoding_error_key, "encoding-error"); | |
c62da8f8 LC |
1493 | SCM_SYMBOL (scm_decoding_error_key, "decoding-error"); |
1494 | ||
6851d3be LC |
1495 | /* Raise an exception informing that character CHR could not be written |
1496 | to PORT in its current encoding. */ | |
d14418a5 | 1497 | void |
ef7e4ba3 | 1498 | scm_encoding_error (const char *subr, int err, const char *message, |
6851d3be | 1499 | SCM port, SCM chr) |
ef7e4ba3 | 1500 | { |
ef7e4ba3 | 1501 | scm_throw (scm_encoding_error_key, |
d050ef66 AW |
1502 | scm_list_n (scm_from_latin1_string (subr), |
1503 | scm_from_latin1_string (message), | |
ef7e4ba3 | 1504 | scm_from_int (err), |
6851d3be | 1505 | port, chr, |
ef7e4ba3 | 1506 | SCM_UNDEFINED)); |
a3d7d5d5 LC |
1507 | } |
1508 | ||
c62da8f8 LC |
1509 | /* Raise an exception informing of an encoding error on PORT. This |
1510 | means that a character could not be written in PORT's encoding. */ | |
1511 | void | |
1512 | scm_decoding_error (const char *subr, int err, const char *message, SCM port) | |
1513 | { | |
1514 | scm_throw (scm_decoding_error_key, | |
d050ef66 AW |
1515 | scm_list_n (scm_from_latin1_string (subr), |
1516 | scm_from_latin1_string (message), | |
c62da8f8 LC |
1517 | scm_from_int (err), |
1518 | port, | |
1519 | SCM_UNDEFINED)); | |
1520 | } | |
1521 | ||
1522 | \f | |
1523 | /* String conversion to/from C. */ | |
1524 | ||
41d1d984 AW |
1525 | static void |
1526 | decoding_error (const char *func_name, int errno_save, | |
1527 | const char *str, size_t len) | |
1528 | { | |
1529 | /* Raise an error and pass the raw C string as a bytevector to the `throw' | |
1530 | handler. */ | |
1531 | SCM bv; | |
1532 | signed char *buf; | |
1533 | ||
1534 | buf = scm_gc_malloc_pointerless (len, "bytevector"); | |
1535 | memcpy (buf, str, len); | |
1536 | bv = scm_c_take_gc_bytevector (buf, len, SCM_BOOL_F); | |
1537 | ||
1538 | scm_decoding_error (func_name, errno_save, | |
1539 | "input locale conversion error", bv); | |
1540 | } | |
1541 | ||
fac32b51 | 1542 | SCM |
587a3355 MG |
1543 | scm_from_stringn (const char *str, size_t len, const char *encoding, |
1544 | scm_t_string_failed_conversion_handler handler) | |
1545 | { | |
1546 | size_t u32len, i; | |
1547 | scm_t_wchar *u32; | |
1548 | int wide = 0; | |
1549 | SCM res; | |
1550 | ||
d40e1ca8 | 1551 | /* The order of these checks is important. */ |
a574564c | 1552 | if (!str && len != 0) |
d40e1ca8 AW |
1553 | scm_misc_error ("scm_from_stringn", "NULL string pointer", SCM_EOL); |
1554 | if (len == (size_t) -1) | |
1555 | len = strlen (str); | |
fac32b51 | 1556 | |
f6f4feb0 | 1557 | if (c_strcasecmp (encoding, "ISO-8859-1") == 0 || len == 0) |
098818a1 | 1558 | return scm_from_latin1_stringn (str, len); |
f6f4feb0 | 1559 | else if (c_strcasecmp (encoding, "UTF-8") == 0 |
8c76a897 | 1560 | && handler == SCM_FAILED_CONVERSION_ERROR) |
098818a1 | 1561 | return scm_from_utf8_stringn (str, len); |
889975e5 | 1562 | |
587a3355 MG |
1563 | u32len = 0; |
1564 | u32 = (scm_t_wchar *) u32_conv_from_encoding (encoding, | |
1565 | (enum iconv_ilseq_handler) | |
1566 | handler, | |
1567 | str, len, | |
1568 | NULL, | |
1569 | NULL, &u32len); | |
1570 | ||
ef7e4ba3 | 1571 | if (SCM_UNLIKELY (u32 == NULL)) |
41d1d984 | 1572 | decoding_error (__func__, errno, str, len); |
587a3355 MG |
1573 | |
1574 | i = 0; | |
1575 | while (i < u32len) | |
1576 | if (u32[i++] > 0xFF) | |
1577 | { | |
1578 | wide = 1; | |
1579 | break; | |
1580 | } | |
1581 | ||
1582 | if (!wide) | |
1583 | { | |
1584 | char *dst; | |
190d4b0d | 1585 | res = scm_i_make_string (u32len, &dst, 0); |
587a3355 MG |
1586 | for (i = 0; i < u32len; i ++) |
1587 | dst[i] = (unsigned char) u32[i]; | |
1588 | dst[u32len] = '\0'; | |
1589 | } | |
1590 | else | |
1591 | { | |
1592 | scm_t_wchar *wdst; | |
190d4b0d | 1593 | res = scm_i_make_wide_string (u32len, &wdst, 0); |
587a3355 MG |
1594 | u32_cpy ((scm_t_uint32 *) wdst, (scm_t_uint32 *) u32, u32len); |
1595 | wdst[u32len] = 0; | |
1596 | } | |
1597 | ||
1598 | free (u32); | |
1599 | return res; | |
1600 | } | |
1601 | ||
cf313a94 | 1602 | SCM |
d40e1ca8 | 1603 | scm_from_locale_string (const char *str) |
cf313a94 | 1604 | { |
d40e1ca8 | 1605 | return scm_from_locale_stringn (str, -1); |
cf313a94 MG |
1606 | } |
1607 | ||
c829a427 MV |
1608 | SCM |
1609 | scm_from_locale_stringn (const char *str, size_t len) | |
1610 | { | |
95f5e303 | 1611 | return scm_from_stringn (str, len, locale_charset (), |
b22e94db | 1612 | scm_i_default_port_conversion_handler ()); |
c829a427 | 1613 | } |
4d4528e7 | 1614 | |
c829a427 | 1615 | SCM |
d40e1ca8 | 1616 | scm_from_latin1_string (const char *str) |
4d4528e7 | 1617 | { |
d40e1ca8 AW |
1618 | return scm_from_latin1_stringn (str, -1); |
1619 | } | |
9c44cd45 | 1620 | |
d40e1ca8 AW |
1621 | SCM |
1622 | scm_from_latin1_stringn (const char *str, size_t len) | |
1623 | { | |
e9a35a96 LC |
1624 | char *buf; |
1625 | SCM result; | |
1626 | ||
1627 | if (len == (size_t) -1) | |
1628 | len = strlen (str); | |
1629 | ||
1630 | /* Make a narrow string and copy STR as is. */ | |
190d4b0d | 1631 | result = scm_i_make_string (len, &buf, 0); |
e9a35a96 LC |
1632 | memcpy (buf, str, len); |
1633 | ||
1634 | return result; | |
c829a427 | 1635 | } |
4d4528e7 | 1636 | |
587a3355 | 1637 | SCM |
d40e1ca8 | 1638 | scm_from_utf8_string (const char *str) |
587a3355 | 1639 | { |
d40e1ca8 AW |
1640 | return scm_from_utf8_stringn (str, -1); |
1641 | } | |
1642 | ||
1643 | SCM | |
1644 | scm_from_utf8_stringn (const char *str, size_t len) | |
1645 | { | |
41d1d984 AW |
1646 | size_t i, char_len; |
1647 | const scm_t_uint8 *ustr = (const scm_t_uint8 *) str; | |
1648 | int ascii = 1, narrow = 1; | |
1649 | SCM res; | |
1650 | ||
1651 | if (len == (size_t) -1) | |
1652 | len = strlen (str); | |
1653 | ||
1654 | i = 0; | |
1655 | char_len = 0; | |
1656 | ||
1657 | while (i < len) | |
1658 | { | |
1659 | if (ustr[i] <= 127) | |
1660 | { | |
1661 | char_len++; | |
1662 | i++; | |
1663 | } | |
1664 | else | |
1665 | { | |
1666 | ucs4_t c; | |
1667 | int nbytes; | |
1668 | ||
1669 | ascii = 0; | |
1670 | ||
1671 | nbytes = u8_mbtouc (&c, ustr + i, len - i); | |
1672 | ||
8c76a897 | 1673 | if (c == 0xfffd) |
41d1d984 AW |
1674 | /* Bad UTF-8. */ |
1675 | decoding_error (__func__, errno, str, len); | |
1676 | ||
1677 | if (c > 255) | |
1678 | narrow = 0; | |
1679 | ||
1680 | char_len++; | |
1681 | i += nbytes; | |
1682 | } | |
1683 | } | |
1684 | ||
1685 | if (ascii) | |
1686 | { | |
1687 | char *dst; | |
1688 | res = scm_i_make_string (char_len, &dst, 0); | |
1689 | memcpy (dst, str, len); | |
1690 | } | |
1691 | else if (narrow) | |
1692 | { | |
1693 | char *dst; | |
1694 | size_t j; | |
1695 | ucs4_t c; | |
1696 | ||
1697 | res = scm_i_make_string (char_len, &dst, 0); | |
1698 | ||
33aadcab | 1699 | for (i = 0, j = 0; i < len; j++) |
41d1d984 AW |
1700 | { |
1701 | i += u8_mbtouc_unsafe (&c, ustr + i, len - i); | |
1702 | dst[j] = (signed char) c; | |
1703 | } | |
1704 | } | |
1705 | else | |
1706 | { | |
1707 | scm_t_wchar *dst; | |
1708 | size_t j; | |
1709 | ucs4_t c; | |
1710 | ||
1711 | res = scm_i_make_wide_string (char_len, &dst, 0); | |
1712 | ||
33aadcab | 1713 | for (i = 0, j = 0; i < len; j++) |
41d1d984 AW |
1714 | { |
1715 | i += u8_mbtouc_unsafe (&c, ustr + i, len - i); | |
1716 | dst[j] = c; | |
1717 | } | |
1718 | } | |
1719 | ||
1720 | return res; | |
587a3355 MG |
1721 | } |
1722 | ||
647dc1ac LC |
1723 | SCM |
1724 | scm_from_utf32_string (const scm_t_wchar *str) | |
1725 | { | |
1726 | return scm_from_utf32_stringn (str, -1); | |
1727 | } | |
1728 | ||
1729 | SCM | |
1730 | scm_from_utf32_stringn (const scm_t_wchar *str, size_t len) | |
1731 | { | |
1732 | SCM result; | |
1733 | scm_t_wchar *buf; | |
1734 | ||
1735 | if (len == (size_t) -1) | |
1736 | len = u32_strlen ((uint32_t *) str); | |
1737 | ||
190d4b0d | 1738 | result = scm_i_make_wide_string (len, &buf, 0); |
647dc1ac LC |
1739 | memcpy (buf, str, len * sizeof (scm_t_wchar)); |
1740 | scm_i_try_narrow_string (result); | |
1741 | ||
1742 | return result; | |
1743 | } | |
1744 | ||
08467a7e AW |
1745 | SCM |
1746 | scm_from_port_string (const char *str, SCM port) | |
1747 | { | |
1748 | return scm_from_port_stringn (str, -1, port); | |
1749 | } | |
1750 | ||
1751 | SCM | |
1752 | scm_from_port_stringn (const char *str, size_t len, SCM port) | |
1753 | { | |
1754 | scm_t_port *pt = SCM_PTAB_ENTRY (port); | |
f6f4feb0 | 1755 | scm_t_port_internal *pti = SCM_PORT_GET_INTERNAL (port); |
08467a7e | 1756 | |
f6f4feb0 | 1757 | if (pti->encoding_mode == SCM_PORT_ENCODING_MODE_LATIN1) |
08467a7e | 1758 | return scm_from_latin1_stringn (str, len); |
f6f4feb0 | 1759 | else if (pti->encoding_mode == SCM_PORT_ENCODING_MODE_UTF8 |
25752c4d AW |
1760 | && (pt->ilseq_handler == SCM_FAILED_CONVERSION_ERROR |
1761 | || (u8_check ((uint8_t *) str, len) == NULL))) | |
08467a7e AW |
1762 | return scm_from_utf8_stringn (str, len); |
1763 | else | |
1764 | return scm_from_stringn (str, len, pt->encoding, pt->ilseq_handler); | |
1765 | } | |
1766 | ||
50b1996f MG |
1767 | /* Create a new scheme string from the C string STR. The memory of |
1768 | STR may be used directly as storage for the new string. */ | |
13a94556 LC |
1769 | /* FIXME: GC-wise, the only way to use the memory area pointed to by STR |
1770 | would be to register a finalizer to eventually free(3) STR, which isn't | |
1771 | worth it. Should we just deprecate the `scm_take_' functions? */ | |
c829a427 MV |
1772 | SCM |
1773 | scm_take_locale_stringn (char *str, size_t len) | |
1774 | { | |
13a94556 | 1775 | SCM res; |
48ddf0d9 | 1776 | |
13a94556 LC |
1777 | res = scm_from_locale_stringn (str, len); |
1778 | free (str); | |
c829a427 | 1779 | |
c829a427 MV |
1780 | return res; |
1781 | } | |
1782 | ||
48ddf0d9 KR |
1783 | SCM |
1784 | scm_take_locale_string (char *str) | |
1785 | { | |
1786 | return scm_take_locale_stringn (str, -1); | |
1787 | } | |
1788 | ||
f1ee6d54 LC |
1789 | /* Change libunistring escapes (`\uXXXX' and `\UXXXXXXXX') in BUF, a |
1790 | *LENP-byte locale-encoded string, to `\xXX', `\uXXXX', or `\UXXXXXX'. | |
31d4d02b LC |
1791 | Set *LENP to the size of the resulting string. |
1792 | ||
1793 | FIXME: This is a hack we should get rid of. See | |
1794 | <http://lists.gnu.org/archive/html/bug-libunistring/2010-09/msg00004.html> | |
1795 | for details. */ | |
1796 | static void | |
1797 | unistring_escapes_to_guile_escapes (char *buf, size_t *lenp) | |
9c44cd45 MG |
1798 | { |
1799 | char *before, *after; | |
1800 | size_t i, j; | |
1801 | ||
4ff2b9f4 LC |
1802 | before = buf; |
1803 | after = buf; | |
9c44cd45 MG |
1804 | i = 0; |
1805 | j = 0; | |
1806 | while (i < *lenp) | |
1807 | { | |
1808 | if ((i <= *lenp - 6) | |
1809 | && before[i] == '\\' | |
1810 | && before[i + 1] == 'u' | |
1811 | && before[i + 2] == '0' && before[i + 3] == '0') | |
1812 | { | |
1813 | /* Convert \u00NN to \xNN */ | |
1814 | after[j] = '\\'; | |
1815 | after[j + 1] = 'x'; | |
30a6b9ca MG |
1816 | after[j + 2] = tolower ((int) before[i + 4]); |
1817 | after[j + 3] = tolower ((int) before[i + 5]); | |
9c44cd45 MG |
1818 | i += 6; |
1819 | j += 4; | |
1820 | } | |
1821 | else if ((i <= *lenp - 10) | |
1822 | && before[i] == '\\' | |
1823 | && before[i + 1] == 'U' | |
1824 | && before[i + 2] == '0' && before[i + 3] == '0') | |
1825 | { | |
1826 | /* Convert \U00NNNNNN to \UNNNNNN */ | |
1827 | after[j] = '\\'; | |
1828 | after[j + 1] = 'U'; | |
30a6b9ca MG |
1829 | after[j + 2] = tolower ((int) before[i + 4]); |
1830 | after[j + 3] = tolower ((int) before[i + 5]); | |
1831 | after[j + 4] = tolower ((int) before[i + 6]); | |
1832 | after[j + 5] = tolower ((int) before[i + 7]); | |
1833 | after[j + 6] = tolower ((int) before[i + 8]); | |
1834 | after[j + 7] = tolower ((int) before[i + 9]); | |
9c44cd45 MG |
1835 | i += 10; |
1836 | j += 8; | |
1837 | } | |
1838 | else | |
1839 | { | |
1840 | after[j] = before[i]; | |
1841 | i++; | |
1842 | j++; | |
1843 | } | |
1844 | } | |
1845 | *lenp = j; | |
9c44cd45 MG |
1846 | } |
1847 | ||
f1ee6d54 LC |
1848 | /* Change libunistring escapes (`\uXXXX' and `\UXXXXXXXX') in BUF, a |
1849 | *LENP-byte locale-encoded string, to `\xXXXX;'. Set *LEN to the size | |
1850 | of the resulting string. BUF must be large enough to handle the | |
1851 | worst case when `\uXXXX' escapes (6 characters) are replaced by | |
1852 | `\xXXXX;' (7 characters). */ | |
31d4d02b LC |
1853 | static void |
1854 | unistring_escapes_to_r6rs_escapes (char *buf, size_t *lenp) | |
d31b9519 MG |
1855 | { |
1856 | char *before, *after; | |
1857 | size_t i, j; | |
1858 | /* The worst case is if the input string contains all 4-digit hex escapes. | |
1859 | "\uXXXX" (six characters) becomes "\xXXXX;" (seven characters) */ | |
1860 | size_t max_out_len = (*lenp * 7) / 6 + 1; | |
1861 | size_t nzeros, ndigits; | |
1862 | ||
4ff2b9f4 | 1863 | before = buf; |
d31b9519 MG |
1864 | after = alloca (max_out_len); |
1865 | i = 0; | |
1866 | j = 0; | |
1867 | while (i < *lenp) | |
1868 | { | |
1869 | if (((i <= *lenp - 6) && before[i] == '\\' && before[i + 1] == 'u') | |
1870 | || ((i <= *lenp - 10) && before[i] == '\\' && before[i + 1] == 'U')) | |
1871 | { | |
1872 | if (before[i + 1] == 'u') | |
1873 | ndigits = 4; | |
1874 | else if (before[i + 1] == 'U') | |
1875 | ndigits = 8; | |
1876 | else | |
1877 | abort (); | |
1878 | ||
1879 | /* Add the R6RS hex escape initial sequence. */ | |
1880 | after[j] = '\\'; | |
1881 | after[j + 1] = 'x'; | |
1882 | ||
1883 | /* Move string positions to the start of the hex numbers. */ | |
1884 | i += 2; | |
1885 | j += 2; | |
1886 | ||
1887 | /* Find the number of initial zeros in this hex number. */ | |
1888 | nzeros = 0; | |
1889 | while (before[i + nzeros] == '0' && nzeros < ndigits) | |
1890 | nzeros++; | |
1891 | ||
1892 | /* Copy the number, skipping initial zeros, and then move the string | |
1893 | positions. */ | |
1894 | if (nzeros == ndigits) | |
1895 | { | |
1896 | after[j] = '0'; | |
1897 | i += ndigits; | |
1898 | j += 1; | |
1899 | } | |
1900 | else | |
1901 | { | |
1902 | int pos; | |
1903 | for (pos = 0; pos < ndigits - nzeros; pos++) | |
1904 | after[j + pos] = tolower ((int) before[i + nzeros + pos]); | |
1905 | i += ndigits; | |
1906 | j += (ndigits - nzeros); | |
1907 | } | |
1908 | ||
1909 | /* Add terminating semicolon. */ | |
1910 | after[j] = ';'; | |
1911 | j++; | |
1912 | } | |
1913 | else | |
1914 | { | |
1915 | after[j] = before[i]; | |
1916 | i++; | |
1917 | j++; | |
1918 | } | |
1919 | } | |
1920 | *lenp = j; | |
d31b9519 MG |
1921 | memcpy (before, after, j); |
1922 | } | |
1923 | ||
cf313a94 | 1924 | char * |
d40e1ca8 | 1925 | scm_to_locale_string (SCM str) |
cf313a94 | 1926 | { |
d40e1ca8 | 1927 | return scm_to_locale_stringn (str, NULL); |
cf313a94 | 1928 | } |
d31b9519 | 1929 | |
c829a427 | 1930 | char * |
fac32b51 | 1931 | scm_to_locale_stringn (SCM str, size_t *lenp) |
c829a427 | 1932 | { |
b22e94db | 1933 | return scm_to_stringn (str, lenp, |
95f5e303 | 1934 | locale_charset (), |
b22e94db | 1935 | scm_i_default_port_conversion_handler ()); |
9c44cd45 MG |
1936 | } |
1937 | ||
d40e1ca8 AW |
1938 | char * |
1939 | scm_to_latin1_string (SCM str) | |
1940 | { | |
1941 | return scm_to_latin1_stringn (str, NULL); | |
1942 | } | |
1943 | ||
1944 | char * | |
1945 | scm_to_latin1_stringn (SCM str, size_t *lenp) | |
e9a35a96 | 1946 | #define FUNC_NAME "scm_to_latin1_stringn" |
d40e1ca8 | 1947 | { |
e9a35a96 LC |
1948 | char *result; |
1949 | ||
1950 | SCM_VALIDATE_STRING (1, str); | |
1951 | ||
1952 | if (scm_i_is_narrow_string (str)) | |
1953 | { | |
fe133640 AW |
1954 | size_t len = scm_i_string_length (str); |
1955 | ||
e9a35a96 | 1956 | if (lenp) |
fe133640 | 1957 | *lenp = len; |
e9a35a96 | 1958 | |
fe133640 | 1959 | result = scm_strndup (scm_i_string_data (str), len); |
e9a35a96 LC |
1960 | } |
1961 | else | |
1962 | result = scm_to_stringn (str, lenp, NULL, | |
fe133640 | 1963 | SCM_FAILED_CONVERSION_ERROR); |
e9a35a96 LC |
1964 | |
1965 | return result; | |
d40e1ca8 | 1966 | } |
e9a35a96 | 1967 | #undef FUNC_NAME |
d40e1ca8 AW |
1968 | |
1969 | char * | |
1970 | scm_to_utf8_string (SCM str) | |
1971 | { | |
1972 | return scm_to_utf8_stringn (str, NULL); | |
1973 | } | |
1974 | ||
e3d45974 AW |
1975 | static size_t |
1976 | latin1_u8_strlen (const scm_t_uint8 *str, size_t len) | |
1977 | { | |
1978 | size_t ret, i; | |
1979 | for (i = 0, ret = 0; i < len; i++) | |
1980 | ret += (str[i] < 128) ? 1 : 2; | |
1981 | return ret; | |
1982 | } | |
1983 | ||
1984 | static scm_t_uint8* | |
1985 | latin1_to_u8 (const scm_t_uint8 *str, size_t latin_len, | |
1986 | scm_t_uint8 *u8_result, size_t *u8_lenp) | |
1987 | { | |
1988 | size_t i, n; | |
1989 | size_t u8_len = latin1_u8_strlen (str, latin_len); | |
1990 | ||
1991 | if (!(u8_result && u8_lenp && *u8_lenp > u8_len)) | |
1992 | u8_result = scm_malloc (u8_len + 1); | |
1993 | if (u8_lenp) | |
1994 | *u8_lenp = u8_len; | |
1995 | ||
1996 | for (i = 0, n = 0; i < latin_len; i++) | |
1997 | n += u8_uctomb (u8_result + n, str[i], u8_len - n); | |
1998 | if (n != u8_len) | |
1999 | abort (); | |
2000 | u8_result[n] = 0; | |
2001 | ||
2002 | return u8_result; | |
2003 | } | |
2004 | ||
e26da7a2 MW |
2005 | /* UTF-8 code table |
2006 | ||
2007 | (Note that this includes code points that are not allowed by Unicode, | |
2008 | but since this function has no way to report an error, and its | |
2009 | purpose is to determine the size of destination buffers for | |
2010 | libunicode conversion functions, we err on the safe side and handle | |
2011 | everything that libunicode might conceivably handle, now or in the | |
2012 | future.) | |
2c1b7951 AW |
2013 | |
2014 | Char. number range | UTF-8 octet sequence | |
2015 | (hexadecimal) | (binary) | |
e26da7a2 | 2016 | --------------------+------------------------------------------------------ |
2c1b7951 AW |
2017 | 0000 0000-0000 007F | 0xxxxxxx |
2018 | 0000 0080-0000 07FF | 110xxxxx 10xxxxxx | |
2019 | 0000 0800-0000 FFFF | 1110xxxx 10xxxxxx 10xxxxxx | |
e26da7a2 MW |
2020 | 0001 0000-001F FFFF | 11110xxx 10xxxxxx 10xxxxxx 10xxxxxx |
2021 | 0020 0000-03FF FFFF | 111110xx 10xxxxxx 10xxxxxx 10xxxxxx 10xxxxxx | |
2022 | 0400 0000-7FFF FFFF | 1111110x 10xxxxxx 10xxxxxx 10xxxxxx 10xxxxxx 10xxxxxx | |
2c1b7951 AW |
2023 | */ |
2024 | ||
2025 | static size_t | |
e26da7a2 | 2026 | u32_u8_length_in_bytes (const scm_t_uint32 *str, size_t len) |
2c1b7951 AW |
2027 | { |
2028 | size_t ret, i; | |
2029 | ||
2030 | for (i = 0, ret = 0; i < len; i++) | |
2031 | { | |
2032 | scm_t_uint32 c = str[i]; | |
2033 | ||
2034 | if (c <= 0x7f) | |
2035 | ret += 1; | |
2036 | else if (c <= 0x7ff) | |
2037 | ret += 2; | |
2038 | else if (c <= 0xffff) | |
2039 | ret += 3; | |
e26da7a2 | 2040 | else if (c <= 0x1fffff) |
2c1b7951 | 2041 | ret += 4; |
e26da7a2 MW |
2042 | else if (c <= 0x3ffffff) |
2043 | ret += 5; | |
2044 | else | |
2045 | ret += 6; | |
2c1b7951 AW |
2046 | } |
2047 | ||
2048 | return ret; | |
2049 | } | |
2050 | ||
d40e1ca8 AW |
2051 | char * |
2052 | scm_to_utf8_stringn (SCM str, size_t *lenp) | |
ee26a9eb | 2053 | #define FUNC_NAME "scm_to_utf8_stringn" |
d40e1ca8 | 2054 | { |
ee26a9eb AW |
2055 | SCM_VALIDATE_STRING (1, str); |
2056 | ||
e3d45974 AW |
2057 | if (scm_i_is_narrow_string (str)) |
2058 | return (char *) latin1_to_u8 ((scm_t_uint8 *) scm_i_string_chars (str), | |
2059 | scm_i_string_length (str), | |
2060 | NULL, lenp); | |
2061 | else | |
2c1b7951 | 2062 | { |
bbb9f000 | 2063 | scm_t_uint32 *chars = (scm_t_uint32 *) scm_i_string_wide_chars (str); |
2c1b7951 | 2064 | scm_t_uint8 *buf, *ret; |
bbb9f000 MW |
2065 | size_t num_chars = scm_i_string_length (str); |
2066 | size_t num_bytes_predicted, num_bytes_actual; | |
2c1b7951 | 2067 | |
bbb9f000 | 2068 | num_bytes_predicted = u32_u8_length_in_bytes (chars, num_chars); |
2c1b7951 | 2069 | |
e26da7a2 | 2070 | if (lenp) |
2c1b7951 | 2071 | { |
bbb9f000 MW |
2072 | *lenp = num_bytes_predicted; |
2073 | buf = scm_malloc (num_bytes_predicted); | |
2c1b7951 | 2074 | } |
e26da7a2 MW |
2075 | else |
2076 | { | |
bbb9f000 MW |
2077 | buf = scm_malloc (num_bytes_predicted + 1); |
2078 | buf[num_bytes_predicted] = 0; | |
e26da7a2 MW |
2079 | } |
2080 | ||
bbb9f000 MW |
2081 | num_bytes_actual = num_bytes_predicted; |
2082 | ret = u32_to_u8 (chars, num_chars, buf, &num_bytes_actual); | |
e26da7a2 | 2083 | |
bbb9f000 | 2084 | if (SCM_LIKELY (ret == buf && num_bytes_actual == num_bytes_predicted)) |
e26da7a2 | 2085 | return (char *) ret; |
2c1b7951 AW |
2086 | |
2087 | /* An error: a bad codepoint. */ | |
2088 | { | |
2089 | int saved_errno = errno; | |
2090 | ||
2091 | free (buf); | |
2092 | if (!saved_errno) | |
2093 | abort (); | |
2094 | ||
2095 | scm_decoding_error ("scm_to_utf8_stringn", errno, | |
2096 | "invalid codepoint in string", str); | |
2097 | ||
2098 | /* Not reached. */ | |
2099 | return NULL; | |
2100 | } | |
2101 | } | |
d40e1ca8 | 2102 | } |
ee26a9eb | 2103 | #undef FUNC_NAME |
d40e1ca8 | 2104 | |
647dc1ac LC |
2105 | scm_t_wchar * |
2106 | scm_to_utf32_string (SCM str) | |
2107 | { | |
2108 | return scm_to_utf32_stringn (str, NULL); | |
2109 | } | |
2110 | ||
2111 | scm_t_wchar * | |
2112 | scm_to_utf32_stringn (SCM str, size_t *lenp) | |
2113 | #define FUNC_NAME "scm_to_utf32_stringn" | |
2114 | { | |
2115 | scm_t_wchar *result; | |
2116 | ||
2117 | SCM_VALIDATE_STRING (1, str); | |
2118 | ||
2119 | if (scm_i_is_narrow_string (str)) | |
e3d45974 AW |
2120 | { |
2121 | scm_t_uint8 *codepoints; | |
2122 | size_t i, len; | |
2123 | ||
2124 | codepoints = (scm_t_uint8*) scm_i_string_chars (str); | |
2125 | len = scm_i_string_length (str); | |
2126 | if (lenp) | |
2127 | *lenp = len; | |
2128 | ||
2129 | result = scm_malloc ((len + 1) * sizeof (scm_t_wchar)); | |
2130 | for (i = 0; i < len; i++) | |
2131 | result[i] = codepoints[i]; | |
2132 | result[len] = 0; | |
2133 | } | |
647dc1ac LC |
2134 | else |
2135 | { | |
2136 | size_t len; | |
2137 | ||
2138 | len = scm_i_string_length (str); | |
2139 | if (lenp) | |
2140 | *lenp = len; | |
2141 | ||
2142 | result = scm_malloc ((len + 1) * sizeof (scm_t_wchar)); | |
2143 | memcpy (result, scm_i_string_wide_chars (str), | |
2144 | len * sizeof (scm_t_wchar)); | |
2145 | result[len] = 0; | |
2146 | } | |
2147 | ||
2148 | return result; | |
2149 | } | |
2150 | #undef FUNC_NAME | |
2151 | ||
08467a7e AW |
2152 | char * |
2153 | scm_to_port_string (SCM str, SCM port) | |
2154 | { | |
2155 | return scm_to_port_stringn (str, NULL, port); | |
2156 | } | |
2157 | ||
2158 | char * | |
2159 | scm_to_port_stringn (SCM str, size_t *lenp, SCM port) | |
2160 | { | |
2161 | scm_t_port *pt = SCM_PTAB_ENTRY (port); | |
f6f4feb0 | 2162 | scm_t_port_internal *pti = SCM_PORT_GET_INTERNAL (port); |
08467a7e | 2163 | |
f6f4feb0 | 2164 | if (pti->encoding_mode == SCM_PORT_ENCODING_MODE_LATIN1 |
08467a7e AW |
2165 | && pt->ilseq_handler == SCM_FAILED_CONVERSION_ERROR) |
2166 | return scm_to_latin1_stringn (str, lenp); | |
f6f4feb0 | 2167 | else if (pti->encoding_mode == SCM_PORT_ENCODING_MODE_UTF8) |
08467a7e AW |
2168 | return scm_to_utf8_stringn (str, lenp); |
2169 | else | |
2170 | return scm_to_stringn (str, lenp, pt->encoding, pt->ilseq_handler); | |
2171 | } | |
2172 | ||
29bcdbb0 LC |
2173 | /* Return a malloc(3)-allocated buffer containing the contents of STR encoded |
2174 | according to ENCODING. If LENP is non-NULL, set it to the size in bytes of | |
2175 | the returned buffer. If the conversion to ENCODING fails, apply the strategy | |
2176 | defined by HANDLER. */ | |
9c44cd45 | 2177 | char * |
587a3355 | 2178 | scm_to_stringn (SCM str, size_t *lenp, const char *encoding, |
eca29b02 | 2179 | scm_t_string_failed_conversion_handler handler) |
9c44cd45 | 2180 | { |
9c44cd45 MG |
2181 | char *buf; |
2182 | size_t ilen, len, i; | |
889975e5 MG |
2183 | int ret; |
2184 | const char *enc; | |
4d4528e7 | 2185 | |
3ee86942 | 2186 | if (!scm_is_string (str)) |
c829a427 | 2187 | scm_wrong_type_arg_msg (NULL, 0, str, "string"); |
9c44cd45 MG |
2188 | ilen = scm_i_string_length (str); |
2189 | ||
2190 | if (ilen == 0) | |
2191 | { | |
2192 | buf = scm_malloc (1); | |
2193 | buf[0] = '\0'; | |
2194 | if (lenp) | |
2195 | *lenp = 0; | |
2196 | return buf; | |
2197 | } | |
587a3355 | 2198 | |
c829a427 | 2199 | if (lenp == NULL) |
9c44cd45 MG |
2200 | for (i = 0; i < ilen; i++) |
2201 | if (scm_i_string_ref (str, i) == '\0') | |
2202 | scm_misc_error (NULL, | |
2203 | "string contains #\\nul character: ~S", | |
2204 | scm_list_1 (str)); | |
2205 | ||
f6f4feb0 MW |
2206 | if (scm_i_is_narrow_string (str) |
2207 | && c_strcasecmp (encoding, "ISO-8859-1") == 0) | |
c829a427 | 2208 | { |
889975e5 MG |
2209 | /* If using native Latin-1 encoding, just copy the string |
2210 | contents. */ | |
9c44cd45 MG |
2211 | if (lenp) |
2212 | { | |
2213 | buf = scm_malloc (ilen); | |
2214 | memcpy (buf, scm_i_string_chars (str), ilen); | |
2215 | *lenp = ilen; | |
2216 | return buf; | |
2217 | } | |
2218 | else | |
2219 | { | |
2220 | buf = scm_malloc (ilen + 1); | |
2221 | memcpy (buf, scm_i_string_chars (str), ilen); | |
2222 | buf[ilen] = '\0'; | |
2223 | return buf; | |
2224 | } | |
c829a427 | 2225 | } |
9c44cd45 | 2226 | |
587a3355 | 2227 | |
9c44cd45 MG |
2228 | buf = NULL; |
2229 | len = 0; | |
889975e5 MG |
2230 | enc = encoding; |
2231 | if (enc == NULL) | |
2232 | enc = "ISO-8859-1"; | |
2233 | if (scm_i_is_narrow_string (str)) | |
2234 | { | |
2235 | ret = mem_iconveh (scm_i_string_chars (str), ilen, | |
2236 | "ISO-8859-1", enc, | |
2237 | (enum iconv_ilseq_handler) handler, NULL, | |
2238 | &buf, &len); | |
9c44cd45 | 2239 | |
889975e5 | 2240 | if (ret != 0) |
ef7e4ba3 | 2241 | scm_encoding_error (__func__, errno, |
6851d3be LC |
2242 | "cannot convert narrow string to output locale", |
2243 | SCM_BOOL_F, | |
2244 | /* FIXME: Faulty character unknown. */ | |
2245 | SCM_BOOL_F); | |
889975e5 MG |
2246 | } |
2247 | else | |
2248 | { | |
d31b9519 | 2249 | buf = u32_conv_to_encoding (enc, |
889975e5 | 2250 | (enum iconv_ilseq_handler) handler, |
d31b9519 | 2251 | (scm_t_uint32 *) scm_i_string_wide_chars (str), |
889975e5 MG |
2252 | ilen, |
2253 | NULL, | |
2254 | NULL, &len); | |
2255 | if (buf == NULL) | |
ef7e4ba3 | 2256 | scm_encoding_error (__func__, errno, |
6851d3be LC |
2257 | "cannot convert wide string to output locale", |
2258 | SCM_BOOL_F, | |
2259 | /* FIXME: Faulty character unknown. */ | |
2260 | SCM_BOOL_F); | |
d31b9519 MG |
2261 | } |
2262 | if (handler == SCM_FAILED_CONVERSION_ESCAPE_SEQUENCE) | |
2263 | { | |
2264 | if (SCM_R6RS_ESCAPES_P) | |
f1ee6d54 LC |
2265 | { |
2266 | /* The worst case is if the input string contains all 4-digit | |
2267 | hex escapes. "\uXXXX" (six characters) becomes "\xXXXX;" | |
2268 | (seven characters). Make BUF large enough to hold | |
2269 | that. */ | |
2270 | buf = scm_realloc (buf, (len * 7) / 6 + 1); | |
31d4d02b | 2271 | unistring_escapes_to_r6rs_escapes (buf, &len); |
f1ee6d54 | 2272 | } |
d31b9519 | 2273 | else |
31d4d02b | 2274 | unistring_escapes_to_guile_escapes (buf, &len); |
4ff2b9f4 LC |
2275 | |
2276 | buf = scm_realloc (buf, len); | |
889975e5 | 2277 | } |
9c44cd45 | 2278 | if (lenp) |
4d4528e7 | 2279 | *lenp = len; |
9c44cd45 MG |
2280 | else |
2281 | { | |
2282 | buf = scm_realloc (buf, len + 1); | |
2283 | buf[len] = '\0'; | |
2284 | } | |
24933780 | 2285 | |
c829a427 | 2286 | scm_remember_upto_here_1 (str); |
9c44cd45 | 2287 | return buf; |
4d4528e7 | 2288 | } |
af68e5e5 | 2289 | |
c829a427 MV |
2290 | size_t |
2291 | scm_to_locale_stringbuf (SCM str, char *buf, size_t max_len) | |
2292 | { | |
2293 | size_t len; | |
9c44cd45 | 2294 | char *result = NULL; |
3ee86942 | 2295 | if (!scm_is_string (str)) |
c829a427 | 2296 | scm_wrong_type_arg_msg (NULL, 0, str, "string"); |
9c44cd45 MG |
2297 | result = scm_to_locale_stringn (str, &len); |
2298 | ||
2299 | memcpy (buf, result, (len > max_len) ? max_len : len); | |
2300 | free (result); | |
2301 | ||
c829a427 MV |
2302 | scm_remember_upto_here_1 (str); |
2303 | return len; | |
2304 | } | |
af68e5e5 | 2305 | |
a3d7d5d5 LC |
2306 | \f |
2307 | /* Unicode string normalization. */ | |
2308 | ||
edb7bb47 JG |
2309 | /* This function is a partial clone of SCM_STRING_TO_U32_BUF from |
2310 | libguile/i18n.c. It would be useful to have this factored out into a more | |
2311 | convenient location, but its use of alloca makes that tricky to do. */ | |
2312 | ||
2313 | static SCM | |
2314 | normalize_str (SCM string, uninorm_t form) | |
2315 | { | |
2316 | SCM ret; | |
2317 | scm_t_uint32 *w_str; | |
2318 | scm_t_wchar *cbuf; | |
2319 | size_t rlen, len = scm_i_string_length (string); | |
2320 | ||
2321 | if (scm_i_is_narrow_string (string)) | |
2322 | { | |
2323 | size_t i; | |
2324 | const char *buf = scm_i_string_chars (string); | |
2325 | ||
2326 | w_str = alloca (sizeof (scm_t_wchar) * (len + 1)); | |
2327 | ||
2328 | for (i = 0; i < len; i ++) | |
2329 | w_str[i] = (unsigned char) buf[i]; | |
2330 | w_str[len] = 0; | |
2331 | } | |
d8164b04 JG |
2332 | else |
2333 | w_str = (scm_t_uint32 *) scm_i_string_wide_chars (string); | |
2334 | ||
edb7bb47 JG |
2335 | w_str = u32_normalize (form, w_str, len, NULL, &rlen); |
2336 | ||
190d4b0d | 2337 | ret = scm_i_make_wide_string (rlen, &cbuf, 0); |
edb7bb47 JG |
2338 | u32_cpy ((scm_t_uint32 *) cbuf, w_str, rlen); |
2339 | free (w_str); | |
d8164b04 JG |
2340 | |
2341 | scm_i_try_narrow_string (ret); | |
2342 | ||
edb7bb47 JG |
2343 | return ret; |
2344 | } | |
2345 | ||
2346 | SCM_DEFINE (scm_string_normalize_nfc, "string-normalize-nfc", 1, 0, 0, | |
2347 | (SCM string), | |
2348 | "Returns the NFC normalized form of @var{string}.") | |
2349 | #define FUNC_NAME s_scm_string_normalize_nfc | |
2350 | { | |
2351 | SCM_VALIDATE_STRING (1, string); | |
2352 | return normalize_str (string, UNINORM_NFC); | |
2353 | } | |
2354 | #undef FUNC_NAME | |
2355 | ||
2356 | SCM_DEFINE (scm_string_normalize_nfd, "string-normalize-nfd", 1, 0, 0, | |
2357 | (SCM string), | |
2358 | "Returns the NFD normalized form of @var{string}.") | |
2359 | #define FUNC_NAME s_scm_string_normalize_nfd | |
2360 | { | |
2361 | SCM_VALIDATE_STRING (1, string); | |
2362 | return normalize_str (string, UNINORM_NFD); | |
2363 | } | |
2364 | #undef FUNC_NAME | |
2365 | ||
2366 | SCM_DEFINE (scm_string_normalize_nfkc, "string-normalize-nfkc", 1, 0, 0, | |
2367 | (SCM string), | |
2368 | "Returns the NFKC normalized form of @var{string}.") | |
2369 | #define FUNC_NAME s_scm_string_normalize_nfkc | |
2370 | { | |
2371 | SCM_VALIDATE_STRING (1, string); | |
2372 | return normalize_str (string, UNINORM_NFKC); | |
2373 | } | |
2374 | #undef FUNC_NAME | |
2375 | ||
2376 | SCM_DEFINE (scm_string_normalize_nfkd, "string-normalize-nfkd", 1, 0, 0, | |
2377 | (SCM string), | |
2378 | "Returns the NFKD normalized form of @var{string}.") | |
2379 | #define FUNC_NAME s_scm_string_normalize_nfkd | |
2380 | { | |
2381 | SCM_VALIDATE_STRING (1, string); | |
2382 | return normalize_str (string, UNINORM_NFKD); | |
2383 | } | |
2384 | #undef FUNC_NAME | |
2385 | ||
7505c6e0 MW |
2386 | /* converts C scm_array of strings to SCM scm_list of strings. |
2387 | If argc < 0, a null terminated scm_array is assumed. | |
2388 | The current locale encoding is assumed */ | |
9c44cd45 | 2389 | SCM |
3ee86942 MV |
2390 | scm_makfromstrs (int argc, char **argv) |
2391 | { | |
2392 | int i = argc; | |
2393 | SCM lst = SCM_EOL; | |
2394 | if (0 > i) | |
2395 | for (i = 0; argv[i]; i++); | |
2396 | while (i--) | |
2397 | lst = scm_cons (scm_from_locale_string (argv[i]), lst); | |
2398 | return lst; | |
2399 | } | |
2400 | ||
c829a427 | 2401 | /* Return a newly allocated array of char pointers to each of the strings |
7505c6e0 MW |
2402 | in args, with a terminating NULL pointer. The strings are encoded using |
2403 | the current locale. */ | |
c829a427 MV |
2404 | |
2405 | char ** | |
2406 | scm_i_allocate_string_pointers (SCM list) | |
2a776823 | 2407 | #define FUNC_NAME "scm_i_allocate_string_pointers" |
af68e5e5 | 2408 | { |
c829a427 | 2409 | char **result; |
7505c6e0 | 2410 | int list_len = scm_ilength (list); |
c829a427 MV |
2411 | int i; |
2412 | ||
7505c6e0 | 2413 | if (list_len < 0) |
c829a427 MV |
2414 | scm_wrong_type_arg_msg (NULL, 0, list, "proper list"); |
2415 | ||
7505c6e0 | 2416 | result = scm_gc_malloc ((list_len + 1) * sizeof (char *), |
2a776823 | 2417 | "string pointers"); |
7505c6e0 | 2418 | result[list_len] = NULL; |
c829a427 | 2419 | |
7505c6e0 | 2420 | /* The list might have been modified in another thread, so |
c829a427 MV |
2421 | we check LIST before each access. |
2422 | */ | |
7505c6e0 | 2423 | for (i = 0; i < list_len && scm_is_pair (list); i++) |
c829a427 | 2424 | { |
7505c6e0 MW |
2425 | SCM str = SCM_CAR (list); |
2426 | size_t len; /* String length in bytes */ | |
2427 | char *c_str = scm_to_locale_stringn (str, &len); | |
2428 | ||
2429 | /* OPTIMIZE-ME: Right now, scm_to_locale_stringn always uses | |
2430 | scm_malloc to allocate the returned string, which must be | |
2431 | explicitly deallocated. This forces us to copy the string a | |
2432 | second time into a new buffer. Ideally there would be variants | |
2433 | of scm_to_*_stringn that can return garbage-collected buffers. */ | |
2434 | ||
2435 | result[i] = scm_gc_malloc_pointerless (len + 1, "string"); | |
2436 | memcpy (result[i], c_str, len); | |
2a776823 | 2437 | result[i][len] = '\0'; |
7505c6e0 | 2438 | free (c_str); |
2a776823 | 2439 | |
c829a427 MV |
2440 | list = SCM_CDR (list); |
2441 | } | |
2442 | ||
c829a427 | 2443 | return result; |
af68e5e5 | 2444 | } |
2a776823 | 2445 | #undef FUNC_NAME |
24933780 | 2446 | |
6f14f578 MV |
2447 | void |
2448 | scm_i_get_substring_spec (size_t len, | |
2449 | SCM start, size_t *cstart, | |
2450 | SCM end, size_t *cend) | |
2451 | { | |
2452 | if (SCM_UNBNDP (start)) | |
2453 | *cstart = 0; | |
2454 | else | |
2455 | *cstart = scm_to_unsigned_integer (start, 0, len); | |
2456 | ||
2457 | if (SCM_UNBNDP (end)) | |
2458 | *cend = len; | |
2459 | else | |
2460 | *cend = scm_to_unsigned_integer (end, *cstart, len); | |
2461 | } | |
2462 | ||
2a610be5 AW |
2463 | static SCM |
2464 | string_handle_ref (scm_t_array_handle *h, size_t index) | |
2465 | { | |
2466 | return scm_c_string_ref (h->array, index); | |
2467 | } | |
2468 | ||
2469 | static void | |
2470 | string_handle_set (scm_t_array_handle *h, size_t index, SCM val) | |
2471 | { | |
2472 | scm_c_string_set_x (h->array, index, val); | |
2473 | } | |
2474 | ||
2475 | static void | |
2476 | string_get_handle (SCM v, scm_t_array_handle *h) | |
2477 | { | |
2478 | h->array = v; | |
2479 | h->ndims = 1; | |
2480 | h->dims = &h->dim0; | |
2481 | h->dim0.lbnd = 0; | |
2482 | h->dim0.ubnd = scm_c_string_length (v) - 1; | |
2483 | h->dim0.inc = 1; | |
2484 | h->element_type = SCM_ARRAY_ELEMENT_TYPE_CHAR; | |
2485 | h->elements = h->writable_elements = NULL; | |
2486 | } | |
2487 | ||
c5f17102 | 2488 | SCM_ARRAY_IMPLEMENTATION (scm_tc7_string, 0x7f, |
2a610be5 | 2489 | string_handle_ref, string_handle_set, |
f65e0168 LC |
2490 | string_get_handle) |
2491 | SCM_VECTOR_IMPLEMENTATION (SCM_ARRAY_ELEMENT_TYPE_CHAR, scm_make_string) | |
2a610be5 | 2492 | |
0f2d19dd JB |
2493 | void |
2494 | scm_init_strings () | |
0f2d19dd | 2495 | { |
a7e392c1 | 2496 | scm_nullstr = scm_i_make_string (0, NULL, 0); |
7c33806a | 2497 | |
a0599745 | 2498 | #include "libguile/strings.x" |
0f2d19dd JB |
2499 | } |
2500 | ||
89e00824 ML |
2501 | |
2502 | /* | |
2503 | Local Variables: | |
2504 | c-file-style: "gnu" | |
2505 | End: | |
2506 | */ |