Commit | Line | Data |
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29bcdbb0 | 1 | /* Copyright (C) 1995,1996,1998,2000,2001, 2004, 2006, 2008, 2009, 2010 Free Software Foundation, Inc. |
0f2d19dd | 2 | * |
73be1d9e | 3 | * This library is free software; you can redistribute it and/or |
53befeb7 NJ |
4 | * modify it under the terms of the GNU Lesser General Public License |
5 | * as published by the Free Software Foundation; either version 3 of | |
6 | * the License, or (at your option) any later version. | |
0f2d19dd | 7 | * |
53befeb7 NJ |
8 | * This library is distributed in the hope that it will be useful, but |
9 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
73be1d9e MV |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
11 | * Lesser General Public License for more details. | |
0f2d19dd | 12 | * |
73be1d9e MV |
13 | * You should have received a copy of the GNU Lesser General Public |
14 | * License along with this library; if not, write to the Free Software | |
53befeb7 NJ |
15 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
16 | * 02110-1301 USA | |
73be1d9e | 17 | */ |
1bbd0b84 | 18 | |
1bbd0b84 | 19 | |
0f2d19dd | 20 | \f |
dbb605f5 LC |
21 | #ifdef HAVE_CONFIG_H |
22 | # include <config.h> | |
23 | #endif | |
0f2d19dd | 24 | |
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> |
faf2c9d7 | 32 | |
889975e5 MG |
33 | #include "striconveh.h" |
34 | ||
a0599745 MD |
35 | #include "libguile/_scm.h" |
36 | #include "libguile/chars.h" | |
7c33806a | 37 | #include "libguile/root.h" |
a0599745 | 38 | #include "libguile/strings.h" |
a3d7d5d5 | 39 | #include "libguile/error.h" |
f45eccff | 40 | #include "libguile/generalized-vectors.h" |
1afff620 | 41 | #include "libguile/deprecation.h" |
a0599745 | 42 | #include "libguile/validate.h" |
d31b9519 | 43 | #include "libguile/private-options.h" |
1afff620 | 44 | |
0f2d19dd JB |
45 | \f |
46 | ||
47 | /* {Strings} | |
48 | */ | |
49 | ||
3ee86942 MV |
50 | |
51 | /* Stringbufs | |
52 | * | |
53 | * XXX - keeping an accurate refcount during GC seems to be quite | |
54 | * tricky, so we just keep score of whether a stringbuf might be | |
50b1996f | 55 | * shared, not whether it definitely is. |
3ee86942 MV |
56 | * |
57 | * The scheme I (mvo) tried to keep an accurate reference count would | |
58 | * recount all strings that point to a stringbuf during the mark-phase | |
59 | * of the GC. This was done since one cannot access the stringbuf of | |
60 | * a string when that string is freed (in order to decrease the | |
61 | * reference count). The memory of the stringbuf might have been | |
62 | * reused already for something completely different. | |
63 | * | |
64 | * This recounted worked for a small number of threads beating on | |
65 | * cow-strings, but it failed randomly with more than 10 threads, say. | |
66 | * I couldn't figure out what went wrong, so I used the conservative | |
67 | * approach implemented below. | |
50b1996f | 68 | * |
ba54a202 LC |
69 | * There are 2 storage strategies for stringbufs: 8-bit and wide. 8-bit |
70 | * strings are ISO-8859-1-encoded strings; wide strings are 32-bit (UCS-4) | |
71 | * strings. | |
3ee86942 MV |
72 | */ |
73 | ||
ba54a202 LC |
74 | /* The size in words of the stringbuf header (type tag + size). */ |
75 | #define STRINGBUF_HEADER_SIZE 2U | |
76 | ||
77 | #define STRINGBUF_HEADER_BYTES (STRINGBUF_HEADER_SIZE * sizeof (SCM)) | |
78 | ||
35920c00 | 79 | #define STRINGBUF_F_SHARED SCM_I_STRINGBUF_F_SHARED |
5f236208 | 80 | #define STRINGBUF_F_WIDE SCM_I_STRINGBUF_F_WIDE |
3ee86942 MV |
81 | |
82 | #define STRINGBUF_TAG scm_tc7_stringbuf | |
83 | #define STRINGBUF_SHARED(buf) (SCM_CELL_WORD_0(buf) & STRINGBUF_F_SHARED) | |
9c44cd45 | 84 | #define STRINGBUF_WIDE(buf) (SCM_CELL_WORD_0(buf) & STRINGBUF_F_WIDE) |
3ee86942 | 85 | |
100e20c7 | 86 | #define STRINGBUF_CONTENTS(buf) ((void *) \ |
ba54a202 LC |
87 | SCM_CELL_OBJECT_LOC (buf, \ |
88 | STRINGBUF_HEADER_SIZE)) | |
100e20c7 LC |
89 | #define STRINGBUF_CHARS(buf) ((unsigned char *) STRINGBUF_CONTENTS (buf)) |
90 | #define STRINGBUF_WIDE_CHARS(buf) ((scm_t_wchar *) STRINGBUF_CONTENTS (buf)) | |
3ee86942 | 91 | |
100e20c7 | 92 | #define STRINGBUF_LENGTH(buf) (SCM_CELL_WORD_1 (buf)) |
3ee86942 | 93 | |
9b41542f LC |
94 | #define SET_STRINGBUF_SHARED(buf) \ |
95 | do \ | |
96 | { \ | |
97 | /* Don't modify BUF if it's already marked as shared since it might be \ | |
98 | a read-only, statically allocated stringbuf. */ \ | |
99 | if (SCM_LIKELY (!STRINGBUF_SHARED (buf))) \ | |
100 | SCM_SET_CELL_WORD_0 ((buf), SCM_CELL_WORD_0 (buf) | STRINGBUF_F_SHARED); \ | |
101 | } \ | |
102 | while (0) | |
3ee86942 | 103 | |
56a3dcd4 | 104 | #ifdef SCM_STRING_LENGTH_HISTOGRAM |
3ee86942 MV |
105 | static size_t lenhist[1001]; |
106 | #endif | |
107 | ||
50b1996f MG |
108 | /* Make a stringbuf with space for LEN 8-bit Latin-1-encoded |
109 | characters. */ | |
3ee86942 MV |
110 | static SCM |
111 | make_stringbuf (size_t len) | |
0f2d19dd | 112 | { |
3ee86942 MV |
113 | /* XXX - for the benefit of SCM_STRING_CHARS, SCM_SYMBOL_CHARS and |
114 | scm_i_symbol_chars, all stringbufs are null-terminated. Once | |
115 | SCM_STRING_CHARS and SCM_SYMBOL_CHARS are removed and the code | |
116 | has been changed for scm_i_symbol_chars, this null-termination | |
117 | can be dropped. | |
118 | */ | |
119 | ||
ba54a202 LC |
120 | SCM buf; |
121 | ||
56a3dcd4 | 122 | #ifdef SCM_STRING_LENGTH_HISTOGRAM |
3ee86942 MV |
123 | if (len < 1000) |
124 | lenhist[len]++; | |
125 | else | |
126 | lenhist[1000]++; | |
127 | #endif | |
0f2d19dd | 128 | |
ba54a202 LC |
129 | buf = PTR2SCM (scm_gc_malloc_pointerless (STRINGBUF_HEADER_BYTES + len + 1, |
130 | "string")); | |
131 | ||
132 | SCM_SET_CELL_TYPE (buf, STRINGBUF_TAG); | |
133 | SCM_SET_CELL_WORD_1 (buf, (scm_t_bits) len); | |
134 | ||
135 | STRINGBUF_CHARS (buf)[len] = 0; | |
136 | ||
137 | return buf; | |
3ee86942 | 138 | } |
e53cc817 | 139 | |
50b1996f MG |
140 | /* Make a stringbuf with space for LEN 32-bit UCS-4-encoded |
141 | characters. */ | |
9c44cd45 MG |
142 | static SCM |
143 | make_wide_stringbuf (size_t len) | |
144 | { | |
ba54a202 LC |
145 | SCM buf; |
146 | size_t raw_len; | |
147 | ||
56a3dcd4 | 148 | #ifdef SCM_STRING_LENGTH_HISTOGRAM |
9c44cd45 MG |
149 | if (len < 1000) |
150 | lenhist[len]++; | |
151 | else | |
152 | lenhist[1000]++; | |
153 | #endif | |
154 | ||
ba54a202 LC |
155 | raw_len = (len + 1) * sizeof (scm_t_wchar); |
156 | buf = PTR2SCM (scm_gc_malloc_pointerless (STRINGBUF_HEADER_BYTES + raw_len, | |
157 | "string")); | |
158 | ||
159 | SCM_SET_CELL_TYPE (buf, STRINGBUF_TAG | STRINGBUF_F_WIDE); | |
160 | SCM_SET_CELL_WORD_1 (buf, (scm_t_bits) len); | |
161 | ||
162 | STRINGBUF_WIDE_CHARS (buf)[len] = 0; | |
163 | ||
164 | return buf; | |
9c44cd45 MG |
165 | } |
166 | ||
ba54a202 LC |
167 | /* Return a UCS-4-encoded stringbuf containing the (possibly Latin-1-encoded) |
168 | characters from BUF. */ | |
169 | static SCM | |
170 | wide_stringbuf (SCM buf) | |
9c44cd45 | 171 | { |
ba54a202 | 172 | SCM new_buf; |
9c44cd45 MG |
173 | |
174 | if (STRINGBUF_WIDE (buf)) | |
ba54a202 LC |
175 | new_buf = buf; |
176 | else | |
9c44cd45 | 177 | { |
ba54a202 LC |
178 | size_t i, len; |
179 | scm_t_wchar *mem; | |
9c44cd45 | 180 | |
ba54a202 | 181 | len = STRINGBUF_LENGTH (buf); |
9c44cd45 | 182 | |
ba54a202 | 183 | new_buf = make_wide_stringbuf (len); |
9c44cd45 | 184 | |
ba54a202 | 185 | mem = STRINGBUF_WIDE_CHARS (new_buf); |
9c44cd45 | 186 | for (i = 0; i < len; i++) |
ba54a202 | 187 | mem[i] = (scm_t_wchar) STRINGBUF_CHARS (buf)[i]; |
9c44cd45 | 188 | mem[len] = 0; |
9c44cd45 | 189 | } |
ba54a202 LC |
190 | |
191 | return new_buf; | |
3ee86942 | 192 | } |
bd9e24b3 | 193 | |
ba54a202 LC |
194 | /* Return a Latin-1-encoded stringbuf containing the (possibly UCS-4-encoded) |
195 | characters from BUF, if possible. */ | |
196 | static SCM | |
587a3355 MG |
197 | narrow_stringbuf (SCM buf) |
198 | { | |
ba54a202 | 199 | SCM new_buf; |
587a3355 MG |
200 | |
201 | if (!STRINGBUF_WIDE (buf)) | |
ba54a202 LC |
202 | new_buf = buf; |
203 | else | |
204 | { | |
205 | size_t i, len; | |
206 | scm_t_wchar *wmem; | |
207 | unsigned char *mem; | |
587a3355 | 208 | |
ba54a202 LC |
209 | len = STRINGBUF_LENGTH (buf); |
210 | wmem = STRINGBUF_WIDE_CHARS (buf); | |
587a3355 | 211 | |
ba54a202 LC |
212 | for (i = 0; i < len; i++) |
213 | if (wmem[i] > 0xFF) | |
214 | /* BUF cannot be narrowed. */ | |
215 | return buf; | |
587a3355 | 216 | |
ba54a202 | 217 | new_buf = make_stringbuf (len); |
587a3355 | 218 | |
ba54a202 LC |
219 | mem = STRINGBUF_CHARS (new_buf); |
220 | for (i = 0; i < len; i++) | |
221 | mem[i] = (unsigned char) wmem[i]; | |
222 | mem[len] = 0; | |
223 | } | |
224 | ||
225 | return new_buf; | |
587a3355 MG |
226 | } |
227 | ||
9de87eea | 228 | scm_i_pthread_mutex_t stringbuf_write_mutex = SCM_I_PTHREAD_MUTEX_INITIALIZER; |
bd9e24b3 | 229 | |
ba54a202 | 230 | \f |
3ee86942 MV |
231 | /* Copy-on-write strings. |
232 | */ | |
bd9e24b3 | 233 | |
3ee86942 | 234 | #define STRING_TAG scm_tc7_string |
bd9e24b3 | 235 | |
3ee86942 MV |
236 | #define STRING_STRINGBUF(str) (SCM_CELL_OBJECT_1(str)) |
237 | #define STRING_START(str) ((size_t)SCM_CELL_WORD_2(str)) | |
238 | #define STRING_LENGTH(str) ((size_t)SCM_CELL_WORD_3(str)) | |
bd9e24b3 | 239 | |
3ee86942 MV |
240 | #define SET_STRING_STRINGBUF(str,buf) (SCM_SET_CELL_OBJECT_1(str,buf)) |
241 | #define SET_STRING_START(str,start) (SCM_SET_CELL_WORD_2(str,start)) | |
242 | ||
243 | #define IS_STRING(str) (SCM_NIMP(str) && SCM_TYP7(str) == STRING_TAG) | |
244 | ||
ed35de72 MV |
245 | /* Read-only strings. |
246 | */ | |
247 | ||
35920c00 | 248 | #define RO_STRING_TAG scm_tc7_ro_string |
ed35de72 MV |
249 | #define IS_RO_STRING(str) (SCM_CELL_TYPE(str)==RO_STRING_TAG) |
250 | ||
e1b29f6a MV |
251 | /* Mutation-sharing substrings |
252 | */ | |
253 | ||
254 | #define SH_STRING_TAG (scm_tc7_string + 0x100) | |
255 | ||
256 | #define SH_STRING_STRING(sh) (SCM_CELL_OBJECT_1(sh)) | |
257 | /* START and LENGTH as for STRINGs. */ | |
258 | ||
259 | #define IS_SH_STRING(str) (SCM_CELL_TYPE(str)==SH_STRING_TAG) | |
260 | ||
e7efe8e7 AW |
261 | SCM scm_nullstr; |
262 | ||
50b1996f MG |
263 | /* Create a scheme string with space for LEN 8-bit Latin-1-encoded |
264 | characters. CHARSP, if not NULL, will be set to location of the | |
265 | char array. */ | |
3ee86942 MV |
266 | SCM |
267 | scm_i_make_string (size_t len, char **charsp) | |
268 | { | |
269 | SCM buf = make_stringbuf (len); | |
270 | SCM res; | |
271 | if (charsp) | |
f59cf998 | 272 | *charsp = (char *) STRINGBUF_CHARS (buf); |
3ee86942 MV |
273 | res = scm_double_cell (STRING_TAG, SCM_UNPACK(buf), |
274 | (scm_t_bits)0, (scm_t_bits) len); | |
275 | return res; | |
0f2d19dd JB |
276 | } |
277 | ||
50b1996f MG |
278 | /* Create a scheme string with space for LEN 32-bit UCS-4-encoded |
279 | characters. CHARSP, if not NULL, will be set to location of the | |
280 | character array. */ | |
9c44cd45 | 281 | SCM |
50b1996f | 282 | scm_i_make_wide_string (size_t len, scm_t_wchar **charsp) |
9c44cd45 MG |
283 | { |
284 | SCM buf = make_wide_stringbuf (len); | |
285 | SCM res; | |
286 | if (charsp) | |
287 | *charsp = STRINGBUF_WIDE_CHARS (buf); | |
288 | res = scm_double_cell (STRING_TAG, SCM_UNPACK (buf), | |
289 | (scm_t_bits) 0, (scm_t_bits) len); | |
290 | return res; | |
291 | } | |
292 | ||
3ee86942 MV |
293 | static void |
294 | validate_substring_args (SCM str, size_t start, size_t end) | |
295 | { | |
296 | if (!IS_STRING (str)) | |
297 | scm_wrong_type_arg_msg (NULL, 0, str, "string"); | |
298 | if (start > STRING_LENGTH (str)) | |
299 | scm_out_of_range (NULL, scm_from_size_t (start)); | |
300 | if (end > STRING_LENGTH (str) || end < start) | |
301 | scm_out_of_range (NULL, scm_from_size_t (end)); | |
302 | } | |
0f2d19dd | 303 | |
e1b29f6a MV |
304 | static inline void |
305 | get_str_buf_start (SCM *str, SCM *buf, size_t *start) | |
306 | { | |
307 | *start = STRING_START (*str); | |
308 | if (IS_SH_STRING (*str)) | |
309 | { | |
310 | *str = SH_STRING_STRING (*str); | |
311 | *start += STRING_START (*str); | |
312 | } | |
313 | *buf = STRING_STRINGBUF (*str); | |
314 | } | |
315 | ||
3ee86942 MV |
316 | SCM |
317 | scm_i_substring (SCM str, size_t start, size_t end) | |
0f2d19dd | 318 | { |
e1b29f6a MV |
319 | SCM buf; |
320 | size_t str_start; | |
321 | get_str_buf_start (&str, &buf, &str_start); | |
9de87eea | 322 | scm_i_pthread_mutex_lock (&stringbuf_write_mutex); |
3ee86942 | 323 | SET_STRINGBUF_SHARED (buf); |
9de87eea | 324 | scm_i_pthread_mutex_unlock (&stringbuf_write_mutex); |
3ee86942 | 325 | return scm_double_cell (STRING_TAG, SCM_UNPACK(buf), |
e1b29f6a MV |
326 | (scm_t_bits)str_start + start, |
327 | (scm_t_bits) end - start); | |
0f2d19dd JB |
328 | } |
329 | ||
ed35de72 MV |
330 | SCM |
331 | scm_i_substring_read_only (SCM str, size_t start, size_t end) | |
332 | { | |
45a9f430 LC |
333 | SCM buf; |
334 | size_t str_start; | |
335 | get_str_buf_start (&str, &buf, &str_start); | |
336 | scm_i_pthread_mutex_lock (&stringbuf_write_mutex); | |
337 | SET_STRINGBUF_SHARED (buf); | |
338 | scm_i_pthread_mutex_unlock (&stringbuf_write_mutex); | |
339 | return scm_double_cell (RO_STRING_TAG, SCM_UNPACK(buf), | |
340 | (scm_t_bits)str_start + start, | |
341 | (scm_t_bits) end - start); | |
ed35de72 MV |
342 | } |
343 | ||
3ee86942 MV |
344 | SCM |
345 | scm_i_substring_copy (SCM str, size_t start, size_t end) | |
346 | { | |
347 | size_t len = end - start; | |
edea856c | 348 | SCM buf, my_buf; |
e1b29f6a MV |
349 | size_t str_start; |
350 | get_str_buf_start (&str, &buf, &str_start); | |
9c44cd45 MG |
351 | if (scm_i_is_narrow_string (str)) |
352 | { | |
353 | my_buf = make_stringbuf (len); | |
354 | memcpy (STRINGBUF_CHARS (my_buf), | |
355 | STRINGBUF_CHARS (buf) + str_start + start, len); | |
356 | } | |
357 | else | |
358 | { | |
359 | my_buf = make_wide_stringbuf (len); | |
360 | u32_cpy ((scm_t_uint32 *) STRINGBUF_WIDE_CHARS (my_buf), | |
361 | (scm_t_uint32 *) (STRINGBUF_WIDE_CHARS (buf) + str_start | |
362 | + start), len); | |
363 | /* Even though this string is wide, the substring may be narrow. | |
50b1996f | 364 | Consider adding code to narrow the string. */ |
9c44cd45 | 365 | } |
3ee86942 | 366 | scm_remember_upto_here_1 (buf); |
9c44cd45 MG |
367 | return scm_double_cell (STRING_TAG, SCM_UNPACK (my_buf), |
368 | (scm_t_bits) 0, (scm_t_bits) len); | |
3ee86942 | 369 | } |
0f2d19dd | 370 | |
e1b29f6a MV |
371 | SCM |
372 | scm_i_substring_shared (SCM str, size_t start, size_t end) | |
373 | { | |
374 | if (start == 0 && end == STRING_LENGTH (str)) | |
375 | return str; | |
376 | else | |
377 | { | |
378 | size_t len = end - start; | |
379 | if (IS_SH_STRING (str)) | |
380 | { | |
381 | start += STRING_START (str); | |
382 | str = SH_STRING_STRING (str); | |
383 | } | |
384 | return scm_double_cell (SH_STRING_TAG, SCM_UNPACK(str), | |
385 | (scm_t_bits)start, (scm_t_bits) len); | |
386 | } | |
387 | } | |
388 | ||
3ee86942 MV |
389 | SCM |
390 | scm_c_substring (SCM str, size_t start, size_t end) | |
391 | { | |
392 | validate_substring_args (str, start, end); | |
393 | return scm_i_substring (str, start, end); | |
394 | } | |
ee149d03 | 395 | |
ed35de72 MV |
396 | SCM |
397 | scm_c_substring_read_only (SCM str, size_t start, size_t end) | |
398 | { | |
399 | validate_substring_args (str, start, end); | |
400 | return scm_i_substring_read_only (str, start, end); | |
401 | } | |
402 | ||
0f2d19dd | 403 | SCM |
3ee86942 | 404 | scm_c_substring_copy (SCM str, size_t start, size_t end) |
0f2d19dd | 405 | { |
3ee86942 MV |
406 | validate_substring_args (str, start, end); |
407 | return scm_i_substring_copy (str, start, end); | |
408 | } | |
409 | ||
3ee86942 MV |
410 | SCM |
411 | scm_c_substring_shared (SCM str, size_t start, size_t end) | |
412 | { | |
413 | validate_substring_args (str, start, end); | |
414 | return scm_i_substring_shared (str, start, end); | |
415 | } | |
0f2d19dd | 416 | |
d6c74168 | 417 | \f |
3ee86942 MV |
418 | /* Internal accessors |
419 | */ | |
420 | ||
50b1996f MG |
421 | /* Returns the number of characters in STR. This may be different |
422 | than the memory size of the string storage. */ | |
3ee86942 MV |
423 | size_t |
424 | scm_i_string_length (SCM str) | |
0f2d19dd | 425 | { |
3ee86942 | 426 | return STRING_LENGTH (str); |
0f2d19dd JB |
427 | } |
428 | ||
50b1996f MG |
429 | /* True if the string is 'narrow', meaning it has a 8-bit Latin-1 |
430 | encoding. False if it is 'wide', having a 32-bit UCS-4 | |
431 | encoding. */ | |
9c44cd45 MG |
432 | int |
433 | scm_i_is_narrow_string (SCM str) | |
434 | { | |
435 | return !STRINGBUF_WIDE (STRING_STRINGBUF (str)); | |
436 | } | |
437 | ||
587a3355 MG |
438 | /* Try to coerce a string to be narrow. It if is narrow already, do |
439 | nothing. If it is wide, shrink it to narrow if none of its | |
440 | characters are above 0xFF. Return true if the string is narrow or | |
441 | was made to be narrow. */ | |
442 | int | |
443 | scm_i_try_narrow_string (SCM str) | |
444 | { | |
ba54a202 | 445 | SET_STRING_STRINGBUF (str, narrow_stringbuf (STRING_STRINGBUF (str))); |
587a3355 MG |
446 | |
447 | return scm_i_is_narrow_string (str); | |
448 | } | |
449 | ||
100e20c7 LC |
450 | /* Return a pointer to the raw data of the string, which can be either Latin-1 |
451 | or UCS-4 encoded data, depending on `scm_i_is_narrow_string (STR)'. */ | |
452 | const void * | |
453 | scm_i_string_data (SCM str) | |
454 | { | |
455 | SCM buf; | |
456 | size_t start; | |
457 | const char *data; | |
458 | ||
459 | get_str_buf_start (&str, &buf, &start); | |
460 | ||
461 | data = STRINGBUF_CONTENTS (buf); | |
462 | data += start * (scm_i_is_narrow_string (str) ? 1 : 4); | |
463 | ||
464 | return data; | |
465 | } | |
466 | ||
50b1996f MG |
467 | /* Returns a pointer to the 8-bit Latin-1 encoded character array of |
468 | STR. */ | |
3ee86942 MV |
469 | const char * |
470 | scm_i_string_chars (SCM str) | |
471 | { | |
472 | SCM buf; | |
e1b29f6a MV |
473 | size_t start; |
474 | get_str_buf_start (&str, &buf, &start); | |
9c44cd45 | 475 | if (scm_i_is_narrow_string (str)) |
f59cf998 | 476 | return (const char *) STRINGBUF_CHARS (buf) + start; |
9c44cd45 MG |
477 | else |
478 | scm_misc_error (NULL, "Invalid read access of chars of wide string: ~s", | |
479 | scm_list_1 (str)); | |
480 | return NULL; | |
3ee86942 | 481 | } |
b00418df | 482 | |
50b1996f MG |
483 | /* Returns a pointer to the 32-bit UCS-4 encoded character array of |
484 | STR. */ | |
9c44cd45 MG |
485 | const scm_t_wchar * |
486 | scm_i_string_wide_chars (SCM str) | |
487 | { | |
488 | SCM buf; | |
489 | size_t start; | |
490 | ||
491 | get_str_buf_start (&str, &buf, &start); | |
492 | if (!scm_i_is_narrow_string (str)) | |
f59cf998 | 493 | return (const scm_t_wchar *) STRINGBUF_WIDE_CHARS (buf) + start; |
9c44cd45 MG |
494 | else |
495 | scm_misc_error (NULL, "Invalid read access of chars of narrow string: ~s", | |
496 | scm_list_1 (str)); | |
497 | } | |
498 | ||
499 | /* If the buffer in ORIG_STR is shared, copy ORIG_STR's characters to | |
500 | a new string buffer, so that it can be modified without modifying | |
50b1996f MG |
501 | other strings. Also, lock the string mutex. Later, one must call |
502 | scm_i_string_stop_writing to unlock the mutex. */ | |
9c44cd45 MG |
503 | SCM |
504 | scm_i_string_start_writing (SCM orig_str) | |
b00418df | 505 | { |
ed35de72 | 506 | SCM buf, str = orig_str; |
e1b29f6a | 507 | size_t start; |
ed35de72 | 508 | |
e1b29f6a | 509 | get_str_buf_start (&str, &buf, &start); |
ed35de72 MV |
510 | if (IS_RO_STRING (str)) |
511 | scm_misc_error (NULL, "string is read-only: ~s", scm_list_1 (orig_str)); | |
512 | ||
9de87eea | 513 | scm_i_pthread_mutex_lock (&stringbuf_write_mutex); |
3ee86942 MV |
514 | if (STRINGBUF_SHARED (buf)) |
515 | { | |
9c44cd45 | 516 | /* Clone the stringbuf. */ |
3ee86942 MV |
517 | size_t len = STRING_LENGTH (str); |
518 | SCM new_buf; | |
519 | ||
9de87eea | 520 | scm_i_pthread_mutex_unlock (&stringbuf_write_mutex); |
3ee86942 | 521 | |
9c44cd45 MG |
522 | if (scm_i_is_narrow_string (str)) |
523 | { | |
524 | new_buf = make_stringbuf (len); | |
525 | memcpy (STRINGBUF_CHARS (new_buf), | |
526 | STRINGBUF_CHARS (buf) + STRING_START (str), len); | |
527 | ||
528 | } | |
529 | else | |
530 | { | |
531 | new_buf = make_wide_stringbuf (len); | |
532 | u32_cpy ((scm_t_uint32 *) STRINGBUF_WIDE_CHARS (new_buf), | |
533 | (scm_t_uint32 *) (STRINGBUF_WIDE_CHARS (buf) | |
534 | + STRING_START (str)), len); | |
535 | } | |
3ee86942 | 536 | |
3ee86942 MV |
537 | SET_STRING_STRINGBUF (str, new_buf); |
538 | start -= STRING_START (str); | |
902578f1 LC |
539 | |
540 | /* FIXME: The following operations are not atomic, so other threads | |
541 | looking at STR may see an inconsistent state. Nevertheless it can't | |
542 | hurt much since (i) accessing STR while it is being mutated can't | |
543 | yield a crash, and (ii) concurrent accesses to STR should be | |
544 | protected by a mutex at the application level. The latter may not | |
545 | apply when STR != ORIG_STR, though. */ | |
3ee86942 | 546 | SET_STRING_START (str, 0); |
902578f1 | 547 | SET_STRING_STRINGBUF (str, new_buf); |
3ee86942 MV |
548 | |
549 | buf = new_buf; | |
550 | ||
9de87eea | 551 | scm_i_pthread_mutex_lock (&stringbuf_write_mutex); |
3ee86942 | 552 | } |
9c44cd45 MG |
553 | return orig_str; |
554 | } | |
3ee86942 | 555 | |
50b1996f | 556 | /* Return a pointer to the 8-bit Latin-1 chars of a string. */ |
9c44cd45 MG |
557 | char * |
558 | scm_i_string_writable_chars (SCM str) | |
559 | { | |
560 | SCM buf; | |
561 | size_t start; | |
3ee86942 | 562 | |
9c44cd45 MG |
563 | get_str_buf_start (&str, &buf, &start); |
564 | if (scm_i_is_narrow_string (str)) | |
f59cf998 | 565 | return (char *) STRINGBUF_CHARS (buf) + start; |
9c44cd45 MG |
566 | else |
567 | scm_misc_error (NULL, "Invalid write access of chars of wide string: ~s", | |
568 | scm_list_1 (str)); | |
569 | return NULL; | |
b00418df DH |
570 | } |
571 | ||
50b1996f | 572 | /* Return a pointer to the UCS-4 codepoints of a string. */ |
9c44cd45 MG |
573 | static scm_t_wchar * |
574 | scm_i_string_writable_wide_chars (SCM str) | |
575 | { | |
576 | SCM buf; | |
577 | size_t start; | |
578 | ||
579 | get_str_buf_start (&str, &buf, &start); | |
580 | if (!scm_i_is_narrow_string (str)) | |
581 | return STRINGBUF_WIDE_CHARS (buf) + start; | |
582 | else | |
1c7b216f | 583 | scm_misc_error (NULL, "Invalid write access of chars of narrow string: ~s", |
9c44cd45 | 584 | scm_list_1 (str)); |
b00418df DH |
585 | } |
586 | ||
50b1996f MG |
587 | /* Unlock the string mutex that was locked when |
588 | scm_i_string_start_writing was called. */ | |
3ee86942 MV |
589 | void |
590 | scm_i_string_stop_writing (void) | |
591 | { | |
9de87eea | 592 | scm_i_pthread_mutex_unlock (&stringbuf_write_mutex); |
3ee86942 | 593 | } |
b00418df | 594 | |
50b1996f | 595 | /* Return the Xth character of STR as a UCS-4 codepoint. */ |
9c44cd45 MG |
596 | scm_t_wchar |
597 | scm_i_string_ref (SCM str, size_t x) | |
598 | { | |
599 | if (scm_i_is_narrow_string (str)) | |
600 | return (scm_t_wchar) (unsigned char) (scm_i_string_chars (str)[x]); | |
601 | else | |
602 | return scm_i_string_wide_chars (str)[x]; | |
603 | } | |
604 | ||
889975e5 MG |
605 | /* Returns index+1 of the first char in STR that matches C, or |
606 | 0 if the char is not found. */ | |
607 | int | |
608 | scm_i_string_contains_char (SCM str, char ch) | |
609 | { | |
610 | size_t i; | |
611 | size_t len = scm_i_string_length (str); | |
612 | ||
613 | i = 0; | |
614 | if (scm_i_is_narrow_string (str)) | |
615 | { | |
616 | while (i < len) | |
617 | { | |
618 | if (scm_i_string_chars (str)[i] == ch) | |
619 | return i+1; | |
620 | i++; | |
621 | } | |
622 | } | |
623 | else | |
624 | { | |
625 | while (i < len) | |
626 | { | |
627 | if (scm_i_string_wide_chars (str)[i] | |
628 | == (unsigned char) ch) | |
629 | return i+1; | |
630 | i++; | |
631 | } | |
632 | } | |
633 | return 0; | |
634 | } | |
635 | ||
3f47e526 MG |
636 | int |
637 | scm_i_string_strcmp (SCM sstr, size_t start_x, const char *cstr) | |
638 | { | |
639 | if (scm_i_is_narrow_string (sstr)) | |
640 | { | |
641 | const char *a = scm_i_string_chars (sstr) + start_x; | |
642 | const char *b = cstr; | |
643 | return strncmp (a, b, strlen(b)); | |
644 | } | |
645 | else | |
646 | { | |
647 | size_t i; | |
648 | const scm_t_wchar *a = scm_i_string_wide_chars (sstr) + start_x; | |
649 | const char *b = cstr; | |
650 | for (i = 0; i < strlen (b); i++) | |
651 | { | |
652 | if (a[i] != (unsigned char) b[i]) | |
653 | return 1; | |
654 | } | |
655 | } | |
656 | return 0; | |
657 | } | |
658 | ||
50b1996f | 659 | /* Set the Pth character of STR to UCS-4 codepoint CHR. */ |
9c44cd45 MG |
660 | void |
661 | scm_i_string_set_x (SCM str, size_t p, scm_t_wchar chr) | |
662 | { | |
663 | if (chr > 0xFF && scm_i_is_narrow_string (str)) | |
ba54a202 | 664 | SET_STRING_STRINGBUF (str, wide_stringbuf (STRING_STRINGBUF (str))); |
9c44cd45 MG |
665 | |
666 | if (scm_i_is_narrow_string (str)) | |
667 | { | |
668 | char *dst = scm_i_string_writable_chars (str); | |
587a3355 | 669 | dst[p] = chr; |
9c44cd45 MG |
670 | } |
671 | else | |
672 | { | |
673 | scm_t_wchar *dst = scm_i_string_writable_wide_chars (str); | |
674 | dst[p] = chr; | |
675 | } | |
676 | } | |
677 | ||
ba54a202 | 678 | \f |
3ee86942 | 679 | /* Symbols. |
587a3355 | 680 | |
3ee86942 MV |
681 | Basic symbol creation and accessing is done here, the rest is in |
682 | symbols.[hc]. This has been done to keep stringbufs and the | |
683 | internals of strings and string-like objects confined to this file. | |
684 | */ | |
685 | ||
686 | #define SYMBOL_STRINGBUF SCM_CELL_OBJECT_1 | |
687 | ||
688 | SCM | |
6869328b MV |
689 | scm_i_make_symbol (SCM name, scm_t_bits flags, |
690 | unsigned long hash, SCM props) | |
3ee86942 MV |
691 | { |
692 | SCM buf; | |
693 | size_t start = STRING_START (name); | |
694 | size_t length = STRING_LENGTH (name); | |
695 | ||
696 | if (IS_SH_STRING (name)) | |
697 | { | |
698 | name = SH_STRING_STRING (name); | |
699 | start += STRING_START (name); | |
700 | } | |
701 | buf = SYMBOL_STRINGBUF (name); | |
702 | ||
703 | if (start == 0 && length == STRINGBUF_LENGTH (buf)) | |
704 | { | |
705 | /* reuse buf. */ | |
9de87eea | 706 | scm_i_pthread_mutex_lock (&stringbuf_write_mutex); |
3ee86942 | 707 | SET_STRINGBUF_SHARED (buf); |
9de87eea | 708 | scm_i_pthread_mutex_unlock (&stringbuf_write_mutex); |
3ee86942 MV |
709 | } |
710 | else | |
711 | { | |
712 | /* make new buf. */ | |
9c44cd45 MG |
713 | if (scm_i_is_narrow_string (name)) |
714 | { | |
715 | SCM new_buf = make_stringbuf (length); | |
716 | memcpy (STRINGBUF_CHARS (new_buf), | |
717 | STRINGBUF_CHARS (buf) + start, length); | |
718 | buf = new_buf; | |
719 | } | |
720 | else | |
721 | { | |
722 | SCM new_buf = make_wide_stringbuf (length); | |
723 | u32_cpy ((scm_t_uint32 *) STRINGBUF_WIDE_CHARS (new_buf), | |
724 | (scm_t_uint32 *) STRINGBUF_WIDE_CHARS (buf) + start, | |
725 | length); | |
726 | buf = new_buf; | |
727 | } | |
3ee86942 | 728 | } |
6869328b | 729 | return scm_double_cell (scm_tc7_symbol | flags, SCM_UNPACK (buf), |
3ee86942 MV |
730 | (scm_t_bits) hash, SCM_UNPACK (props)); |
731 | } | |
732 | ||
fd0a5bbc HWN |
733 | SCM |
734 | scm_i_c_make_symbol (const char *name, size_t len, | |
735 | scm_t_bits flags, unsigned long hash, SCM props) | |
736 | { | |
737 | SCM buf = make_stringbuf (len); | |
738 | memcpy (STRINGBUF_CHARS (buf), name, len); | |
739 | ||
a284cc7e LC |
740 | return scm_immutable_double_cell (scm_tc7_symbol | flags, SCM_UNPACK (buf), |
741 | (scm_t_bits) hash, SCM_UNPACK (props)); | |
fd0a5bbc HWN |
742 | } |
743 | ||
50b1996f MG |
744 | /* Returns the number of characters in SYM. This may be different |
745 | from the memory size of SYM. */ | |
3ee86942 MV |
746 | size_t |
747 | scm_i_symbol_length (SCM sym) | |
0f2d19dd | 748 | { |
3ee86942 | 749 | return STRINGBUF_LENGTH (SYMBOL_STRINGBUF (sym)); |
0f2d19dd JB |
750 | } |
751 | ||
071bb6a8 LC |
752 | size_t |
753 | scm_c_symbol_length (SCM sym) | |
754 | #define FUNC_NAME "scm_c_symbol_length" | |
755 | { | |
756 | SCM_VALIDATE_SYMBOL (1, sym); | |
757 | ||
758 | return STRINGBUF_LENGTH (SYMBOL_STRINGBUF (sym)); | |
759 | } | |
760 | #undef FUNC_NAME | |
761 | ||
50b1996f MG |
762 | /* True if the name of SYM is stored as a Latin-1 encoded string. |
763 | False if it is stored as a 32-bit UCS-4-encoded string. */ | |
9c44cd45 MG |
764 | int |
765 | scm_i_is_narrow_symbol (SCM sym) | |
766 | { | |
767 | SCM buf; | |
768 | ||
769 | buf = SYMBOL_STRINGBUF (sym); | |
770 | return !STRINGBUF_WIDE (buf); | |
771 | } | |
772 | ||
50b1996f MG |
773 | /* Returns a pointer to the 8-bit Latin-1 encoded character array that |
774 | contains the name of SYM. */ | |
3ee86942 MV |
775 | const char * |
776 | scm_i_symbol_chars (SCM sym) | |
777 | { | |
9c44cd45 MG |
778 | SCM buf; |
779 | ||
780 | buf = SYMBOL_STRINGBUF (sym); | |
781 | if (!STRINGBUF_WIDE (buf)) | |
f59cf998 | 782 | return (const char *) STRINGBUF_CHARS (buf); |
9c44cd45 MG |
783 | else |
784 | scm_misc_error (NULL, "Invalid access of chars of a wide symbol ~S", | |
785 | scm_list_1 (sym)); | |
786 | } | |
787 | ||
50b1996f MG |
788 | /* Return a pointer to the 32-bit UCS-4-encoded character array of a |
789 | symbol's name. */ | |
9c44cd45 MG |
790 | const scm_t_wchar * |
791 | scm_i_symbol_wide_chars (SCM sym) | |
792 | { | |
793 | SCM buf; | |
794 | ||
795 | buf = SYMBOL_STRINGBUF (sym); | |
796 | if (STRINGBUF_WIDE (buf)) | |
f59cf998 | 797 | return (const scm_t_wchar *) STRINGBUF_WIDE_CHARS (buf); |
9c44cd45 MG |
798 | else |
799 | scm_misc_error (NULL, "Invalid access of chars of a narrow symbol ~S", | |
800 | scm_list_1 (sym)); | |
3ee86942 | 801 | } |
1cc91f1b | 802 | |
be54b15d | 803 | SCM |
3ee86942 | 804 | scm_i_symbol_substring (SCM sym, size_t start, size_t end) |
be54b15d | 805 | { |
3ee86942 | 806 | SCM buf = SYMBOL_STRINGBUF (sym); |
9de87eea | 807 | scm_i_pthread_mutex_lock (&stringbuf_write_mutex); |
3ee86942 | 808 | SET_STRINGBUF_SHARED (buf); |
9de87eea | 809 | scm_i_pthread_mutex_unlock (&stringbuf_write_mutex); |
fd2b17b9 | 810 | return scm_double_cell (RO_STRING_TAG, SCM_UNPACK (buf), |
3ee86942 MV |
811 | (scm_t_bits)start, (scm_t_bits) end - start); |
812 | } | |
be54b15d | 813 | |
50b1996f | 814 | /* Returns the Xth character of symbol SYM as a UCS-4 codepoint. */ |
9c44cd45 MG |
815 | scm_t_wchar |
816 | scm_i_symbol_ref (SCM sym, size_t x) | |
817 | { | |
818 | if (scm_i_is_narrow_symbol (sym)) | |
819 | return (scm_t_wchar) (unsigned char) (scm_i_symbol_chars (sym)[x]); | |
820 | else | |
821 | return scm_i_symbol_wide_chars (sym)[x]; | |
822 | } | |
823 | ||
3ee86942 MV |
824 | /* Debugging |
825 | */ | |
be54b15d | 826 | |
6ce6923b MG |
827 | SCM_DEFINE (scm_sys_string_dump, "%string-dump", 1, 0, 0, (SCM str), |
828 | "Returns an association list containing debugging information\n" | |
829 | "for @var{str}. The association list has the following entries." | |
830 | "@table @code\n" | |
831 | "@item string\n" | |
832 | "The string itself.\n" | |
833 | "@item start\n" | |
834 | "The start index of the string into its stringbuf\n" | |
835 | "@item length\n" | |
836 | "The length of the string\n" | |
837 | "@item shared\n" | |
838 | "If this string is a substring, it returns its parent string.\n" | |
839 | "Otherwise, it returns @code{#f}\n" | |
88ed5759 MG |
840 | "@item read-only\n" |
841 | "@code{#t} if the string is read-only\n" | |
6ce6923b MG |
842 | "@item stringbuf-chars\n" |
843 | "A new string containing this string's stringbuf's characters\n" | |
844 | "@item stringbuf-length\n" | |
845 | "The number of characters in this stringbuf\n" | |
846 | "@item stringbuf-shared\n" | |
847 | "@code{#t} if this stringbuf is shared\n" | |
6ce6923b MG |
848 | "@item stringbuf-wide\n" |
849 | "@code{#t} if this stringbuf's characters are stored in a\n" | |
850 | "32-bit buffer, or @code{#f} if they are stored in an 8-bit\n" | |
851 | "buffer\n" | |
852 | "@end table") | |
3ee86942 MV |
853 | #define FUNC_NAME s_scm_sys_string_dump |
854 | { | |
ba54a202 | 855 | SCM e1, e2, e3, e4, e5, e6, e7, e8, e9; |
6ce6923b | 856 | SCM buf; |
3ee86942 | 857 | SCM_VALIDATE_STRING (1, str); |
6ce6923b MG |
858 | |
859 | /* String info */ | |
860 | e1 = scm_cons (scm_from_locale_symbol ("string"), | |
861 | str); | |
862 | e2 = scm_cons (scm_from_locale_symbol ("start"), | |
863 | scm_from_size_t (STRING_START (str))); | |
864 | e3 = scm_cons (scm_from_locale_symbol ("length"), | |
865 | scm_from_size_t (STRING_LENGTH (str))); | |
866 | ||
3ee86942 MV |
867 | if (IS_SH_STRING (str)) |
868 | { | |
6ce6923b MG |
869 | e4 = scm_cons (scm_from_locale_symbol ("shared"), |
870 | SH_STRING_STRING (str)); | |
871 | buf = STRING_STRINGBUF (SH_STRING_STRING (str)); | |
3ee86942 MV |
872 | } |
873 | else | |
874 | { | |
6ce6923b MG |
875 | e4 = scm_cons (scm_from_locale_symbol ("shared"), |
876 | SCM_BOOL_F); | |
877 | buf = STRING_STRINGBUF (str); | |
3ee86942 | 878 | } |
9c44cd45 | 879 | |
88ed5759 MG |
880 | if (IS_RO_STRING (str)) |
881 | e5 = scm_cons (scm_from_locale_symbol ("read-only"), | |
882 | SCM_BOOL_T); | |
883 | else | |
884 | e5 = scm_cons (scm_from_locale_symbol ("read-only"), | |
885 | SCM_BOOL_F); | |
587a3355 | 886 | |
6ce6923b | 887 | /* Stringbuf info */ |
6ce6923b MG |
888 | if (!STRINGBUF_WIDE (buf)) |
889 | { | |
890 | size_t len = STRINGBUF_LENGTH (buf); | |
891 | char *cbuf; | |
892 | SCM sbc = scm_i_make_string (len, &cbuf); | |
893 | memcpy (cbuf, STRINGBUF_CHARS (buf), len); | |
894 | e6 = scm_cons (scm_from_locale_symbol ("stringbuf-chars"), | |
895 | sbc); | |
3ee86942 | 896 | } |
6ce6923b MG |
897 | else |
898 | { | |
899 | size_t len = STRINGBUF_LENGTH (buf); | |
900 | scm_t_wchar *cbuf; | |
901 | SCM sbc = scm_i_make_wide_string (len, &cbuf); | |
902 | u32_cpy ((scm_t_uint32 *) cbuf, | |
903 | (scm_t_uint32 *) STRINGBUF_WIDE_CHARS (buf), len); | |
904 | e6 = scm_cons (scm_from_locale_symbol ("stringbuf-chars"), | |
905 | sbc); | |
906 | } | |
907 | e7 = scm_cons (scm_from_locale_symbol ("stringbuf-length"), | |
908 | scm_from_size_t (STRINGBUF_LENGTH (buf))); | |
909 | if (STRINGBUF_SHARED (buf)) | |
910 | e8 = scm_cons (scm_from_locale_symbol ("stringbuf-shared"), | |
911 | SCM_BOOL_T); | |
912 | else | |
913 | e8 = scm_cons (scm_from_locale_symbol ("stringbuf-shared"), | |
914 | SCM_BOOL_F); | |
6ce6923b | 915 | if (STRINGBUF_WIDE (buf)) |
ba54a202 LC |
916 | e9 = scm_cons (scm_from_locale_symbol ("stringbuf-wide"), |
917 | SCM_BOOL_T); | |
6ce6923b | 918 | else |
ba54a202 LC |
919 | e9 = scm_cons (scm_from_locale_symbol ("stringbuf-wide"), |
920 | SCM_BOOL_F); | |
6ce6923b | 921 | |
ba54a202 | 922 | return scm_list_n (e1, e2, e3, e4, e5, e6, e7, e8, e9, SCM_UNDEFINED); |
3ee86942 MV |
923 | } |
924 | #undef FUNC_NAME | |
925 | ||
6ce6923b MG |
926 | SCM_DEFINE (scm_sys_symbol_dump, "%symbol-dump", 1, 0, 0, (SCM sym), |
927 | "Returns an association list containing debugging information\n" | |
928 | "for @var{sym}. The association list has the following entries." | |
929 | "@table @code\n" | |
930 | "@item symbol\n" | |
931 | "The symbol itself\n" | |
932 | "@item hash\n" | |
933 | "Its hash value\n" | |
88ed5759 MG |
934 | "@item interned\n" |
935 | "@code{#t} if it is an interned symbol\n" | |
6ce6923b MG |
936 | "@item stringbuf-chars\n" |
937 | "A new string containing this symbols's stringbuf's characters\n" | |
938 | "@item stringbuf-length\n" | |
939 | "The number of characters in this stringbuf\n" | |
940 | "@item stringbuf-shared\n" | |
941 | "@code{#t} if this stringbuf is shared\n" | |
6ce6923b MG |
942 | "@item stringbuf-wide\n" |
943 | "@code{#t} if this stringbuf's characters are stored in a\n" | |
944 | "32-bit buffer, or @code{#f} if they are stored in an 8-bit\n" | |
945 | "buffer\n" | |
946 | "@end table") | |
3ee86942 MV |
947 | #define FUNC_NAME s_scm_sys_symbol_dump |
948 | { | |
ba54a202 | 949 | SCM e1, e2, e3, e4, e5, e6, e7; |
6ce6923b | 950 | SCM buf; |
3ee86942 | 951 | SCM_VALIDATE_SYMBOL (1, sym); |
6ce6923b MG |
952 | e1 = scm_cons (scm_from_locale_symbol ("symbol"), |
953 | sym); | |
954 | e2 = scm_cons (scm_from_locale_symbol ("hash"), | |
955 | scm_from_ulong (scm_i_symbol_hash (sym))); | |
88ed5759 MG |
956 | e3 = scm_cons (scm_from_locale_symbol ("interned"), |
957 | scm_symbol_interned_p (sym)); | |
6ce6923b MG |
958 | buf = SYMBOL_STRINGBUF (sym); |
959 | ||
960 | /* Stringbuf info */ | |
6ce6923b MG |
961 | if (!STRINGBUF_WIDE (buf)) |
962 | { | |
963 | size_t len = STRINGBUF_LENGTH (buf); | |
964 | char *cbuf; | |
965 | SCM sbc = scm_i_make_string (len, &cbuf); | |
966 | memcpy (cbuf, STRINGBUF_CHARS (buf), len); | |
967 | e4 = scm_cons (scm_from_locale_symbol ("stringbuf-chars"), | |
968 | sbc); | |
969 | } | |
9c44cd45 | 970 | else |
6ce6923b MG |
971 | { |
972 | size_t len = STRINGBUF_LENGTH (buf); | |
973 | scm_t_wchar *cbuf; | |
974 | SCM sbc = scm_i_make_wide_string (len, &cbuf); | |
975 | u32_cpy ((scm_t_uint32 *) cbuf, | |
976 | (scm_t_uint32 *) STRINGBUF_WIDE_CHARS (buf), len); | |
977 | e4 = scm_cons (scm_from_locale_symbol ("stringbuf-chars"), | |
978 | sbc); | |
979 | } | |
980 | e5 = scm_cons (scm_from_locale_symbol ("stringbuf-length"), | |
981 | scm_from_size_t (STRINGBUF_LENGTH (buf))); | |
982 | if (STRINGBUF_SHARED (buf)) | |
983 | e6 = scm_cons (scm_from_locale_symbol ("stringbuf-shared"), | |
984 | SCM_BOOL_T); | |
985 | else | |
986 | e6 = scm_cons (scm_from_locale_symbol ("stringbuf-shared"), | |
987 | SCM_BOOL_F); | |
6ce6923b | 988 | if (STRINGBUF_WIDE (buf)) |
ba54a202 | 989 | e7 = scm_cons (scm_from_locale_symbol ("stringbuf-wide"), |
6ce6923b MG |
990 | SCM_BOOL_T); |
991 | else | |
ba54a202 | 992 | e7 = scm_cons (scm_from_locale_symbol ("stringbuf-wide"), |
6ce6923b | 993 | SCM_BOOL_F); |
ba54a202 | 994 | return scm_list_n (e1, e2, e3, e4, e5, e6, e7, SCM_UNDEFINED); |
6ce6923b | 995 | |
3ee86942 MV |
996 | } |
997 | #undef FUNC_NAME | |
998 | ||
56a3dcd4 | 999 | #ifdef SCM_STRING_LENGTH_HISTOGRAM |
6ce6923b | 1000 | |
9c44cd45 | 1001 | SCM_DEFINE (scm_sys_stringbuf_hist, "%stringbuf-hist", 0, 0, 0, (void), "") |
e1b29f6a | 1002 | #define FUNC_NAME s_scm_sys_stringbuf_hist |
3ee86942 MV |
1003 | { |
1004 | int i; | |
1005 | for (i = 0; i < 1000; i++) | |
1006 | if (lenhist[i]) | |
1007 | fprintf (stderr, " %3d: %u\n", i, lenhist[i]); | |
1008 | fprintf (stderr, ">999: %u\n", lenhist[1000]); | |
1009 | return SCM_UNSPECIFIED; | |
be54b15d DH |
1010 | } |
1011 | #undef FUNC_NAME | |
1012 | ||
3ee86942 MV |
1013 | #endif |
1014 | ||
1015 | \f | |
1016 | ||
1017 | SCM_DEFINE (scm_string_p, "string?", 1, 0, 0, | |
1018 | (SCM obj), | |
1019 | "Return @code{#t} if @var{obj} is a string, else @code{#f}.") | |
1020 | #define FUNC_NAME s_scm_string_p | |
1021 | { | |
1022 | return scm_from_bool (IS_STRING (obj)); | |
1023 | } | |
1024 | #undef FUNC_NAME | |
1025 | ||
1026 | ||
1027 | SCM_REGISTER_PROC (s_scm_list_to_string, "list->string", 1, 0, 0, scm_string); | |
1028 | ||
1029 | SCM_DEFINE (scm_string, "string", 0, 0, 1, | |
1030 | (SCM chrs), | |
1031 | "@deffnx {Scheme Procedure} list->string chrs\n" | |
1032 | "Return a newly allocated string composed of the arguments,\n" | |
1033 | "@var{chrs}.") | |
1034 | #define FUNC_NAME s_scm_string | |
1035 | { | |
9aa27c1a | 1036 | SCM result = SCM_BOOL_F; |
9c44cd45 | 1037 | SCM rest; |
3ee86942 | 1038 | size_t len; |
9c44cd45 MG |
1039 | size_t p = 0; |
1040 | long i; | |
9aa27c1a | 1041 | int wide = 0; |
3ee86942 | 1042 | |
9c44cd45 MG |
1043 | /* Verify that this is a list of chars. */ |
1044 | i = scm_ilength (chrs); | |
3c7cf7f5 | 1045 | SCM_ASSERT (i >= 0, chrs, SCM_ARG1, FUNC_NAME); |
3ee86942 | 1046 | |
9c44cd45 MG |
1047 | len = (size_t) i; |
1048 | rest = chrs; | |
3ee86942 | 1049 | |
9c44cd45 | 1050 | while (len > 0 && scm_is_pair (rest)) |
3ee86942 | 1051 | { |
9c44cd45 | 1052 | SCM elt = SCM_CAR (rest); |
3ee86942 | 1053 | SCM_VALIDATE_CHAR (SCM_ARGn, elt); |
9aa27c1a MG |
1054 | if (SCM_CHAR (elt) > 0xFF) |
1055 | wide = 1; | |
9c44cd45 MG |
1056 | rest = SCM_CDR (rest); |
1057 | len--; | |
1058 | scm_remember_upto_here_1 (elt); | |
1059 | } | |
1060 | ||
1061 | /* Construct a string containing this list of chars. */ | |
1062 | len = (size_t) i; | |
1063 | rest = chrs; | |
1064 | ||
9aa27c1a | 1065 | if (wide == 0) |
9c44cd45 | 1066 | { |
56a3dcd4 LC |
1067 | char *buf; |
1068 | ||
9aa27c1a MG |
1069 | result = scm_i_make_string (len, NULL); |
1070 | result = scm_i_string_start_writing (result); | |
56a3dcd4 | 1071 | buf = scm_i_string_writable_chars (result); |
9aa27c1a MG |
1072 | while (len > 0 && scm_is_pair (rest)) |
1073 | { | |
1074 | SCM elt = SCM_CAR (rest); | |
1075 | buf[p] = (unsigned char) SCM_CHAR (elt); | |
1076 | p++; | |
1077 | rest = SCM_CDR (rest); | |
1078 | len--; | |
1079 | scm_remember_upto_here_1 (elt); | |
1080 | } | |
1081 | } | |
1082 | else | |
1083 | { | |
56a3dcd4 LC |
1084 | scm_t_wchar *buf; |
1085 | ||
9aa27c1a MG |
1086 | result = scm_i_make_wide_string (len, NULL); |
1087 | result = scm_i_string_start_writing (result); | |
56a3dcd4 | 1088 | buf = scm_i_string_writable_wide_chars (result); |
9aa27c1a MG |
1089 | while (len > 0 && scm_is_pair (rest)) |
1090 | { | |
1091 | SCM elt = SCM_CAR (rest); | |
1092 | buf[p] = SCM_CHAR (elt); | |
1093 | p++; | |
1094 | rest = SCM_CDR (rest); | |
1095 | len--; | |
1096 | scm_remember_upto_here_1 (elt); | |
1097 | } | |
3ee86942 | 1098 | } |
9c44cd45 MG |
1099 | scm_i_string_stop_writing (); |
1100 | ||
3ee86942 MV |
1101 | if (len > 0) |
1102 | scm_misc_error (NULL, "list changed while constructing string", SCM_EOL); | |
9c44cd45 | 1103 | if (!scm_is_null (rest)) |
3ee86942 MV |
1104 | scm_wrong_type_arg_msg (NULL, 0, chrs, "proper list"); |
1105 | ||
1106 | return result; | |
1107 | } | |
1108 | #undef FUNC_NAME | |
be54b15d | 1109 | |
3b3b36dd | 1110 | SCM_DEFINE (scm_make_string, "make-string", 1, 1, 0, |
6fa73e72 | 1111 | (SCM k, SCM chr), |
0d26a824 MG |
1112 | "Return a newly allocated string of\n" |
1113 | "length @var{k}. If @var{chr} is given, then all elements of\n" | |
1114 | "the string are initialized to @var{chr}, otherwise the contents\n" | |
3ef6650d | 1115 | "of the @var{string} are all set to @var{#\nul}.") |
1bbd0b84 | 1116 | #define FUNC_NAME s_scm_make_string |
0f2d19dd | 1117 | { |
3ee86942 MV |
1118 | return scm_c_make_string (scm_to_size_t (k), chr); |
1119 | } | |
1120 | #undef FUNC_NAME | |
1121 | ||
1122 | SCM | |
1123 | scm_c_make_string (size_t len, SCM chr) | |
1124 | #define FUNC_NAME NULL | |
1125 | { | |
9c44cd45 | 1126 | size_t p; |
3ef6650d AW |
1127 | char *contents = NULL; |
1128 | SCM res = scm_i_make_string (len, &contents); | |
cb0d8be2 | 1129 | |
3ef6650d AW |
1130 | /* If no char is given, initialize string contents to NULL. */ |
1131 | if (SCM_UNBNDP (chr)) | |
1132 | memset (contents, 0, len); | |
1133 | else | |
e11e83f3 | 1134 | { |
3ee86942 | 1135 | SCM_VALIDATE_CHAR (0, chr); |
9c44cd45 MG |
1136 | res = scm_i_string_start_writing (res); |
1137 | for (p = 0; p < len; p++) | |
1138 | scm_i_string_set_x (res, p, SCM_CHAR (chr)); | |
1139 | scm_i_string_stop_writing (); | |
0f2d19dd | 1140 | } |
e11e83f3 MV |
1141 | |
1142 | return res; | |
0f2d19dd | 1143 | } |
1bbd0b84 | 1144 | #undef FUNC_NAME |
0f2d19dd | 1145 | |
3b3b36dd | 1146 | SCM_DEFINE (scm_string_length, "string-length", 1, 0, 0, |
0d26a824 MG |
1147 | (SCM string), |
1148 | "Return the number of characters in @var{string}.") | |
1bbd0b84 | 1149 | #define FUNC_NAME s_scm_string_length |
0f2d19dd | 1150 | { |
d1ca2c64 | 1151 | SCM_VALIDATE_STRING (1, string); |
3ee86942 | 1152 | return scm_from_size_t (STRING_LENGTH (string)); |
0f2d19dd | 1153 | } |
1bbd0b84 | 1154 | #undef FUNC_NAME |
0f2d19dd | 1155 | |
f8ba2bb9 | 1156 | SCM_DEFINE (scm_string_bytes_per_char, "string-bytes-per-char", 1, 0, 0, |
9c44cd45 MG |
1157 | (SCM string), |
1158 | "Return the bytes used to represent a character in @var{string}." | |
1159 | "This will return 1 or 4.") | |
f8ba2bb9 | 1160 | #define FUNC_NAME s_scm_string_bytes_per_char |
9c44cd45 MG |
1161 | { |
1162 | SCM_VALIDATE_STRING (1, string); | |
1163 | if (!scm_i_is_narrow_string (string)) | |
1164 | return scm_from_int (4); | |
1165 | ||
1166 | return scm_from_int (1); | |
1167 | } | |
1168 | #undef FUNC_NAME | |
1169 | ||
3ee86942 MV |
1170 | size_t |
1171 | scm_c_string_length (SCM string) | |
1172 | { | |
1173 | if (!IS_STRING (string)) | |
1174 | scm_wrong_type_arg_msg (NULL, 0, string, "string"); | |
1175 | return STRING_LENGTH (string); | |
1176 | } | |
1177 | ||
bd9e24b3 | 1178 | SCM_DEFINE (scm_string_ref, "string-ref", 2, 0, 0, |
6fa73e72 | 1179 | (SCM str, SCM k), |
9c44cd45 MG |
1180 | "Return character @var{k} of @var{str} using zero-origin\n" |
1181 | "indexing. @var{k} must be a valid index of @var{str}.") | |
1bbd0b84 | 1182 | #define FUNC_NAME s_scm_string_ref |
0f2d19dd | 1183 | { |
3ae3166b | 1184 | size_t len; |
a55c2b68 | 1185 | unsigned long idx; |
bd9e24b3 | 1186 | |
d1ca2c64 | 1187 | SCM_VALIDATE_STRING (1, str); |
3ae3166b LC |
1188 | |
1189 | len = scm_i_string_length (str); | |
1190 | if (SCM_LIKELY (len > 0)) | |
1191 | idx = scm_to_unsigned_integer (k, 0, len - 1); | |
1192 | else | |
1193 | scm_out_of_range (NULL, k); | |
1194 | ||
9c44cd45 MG |
1195 | if (scm_i_is_narrow_string (str)) |
1196 | return SCM_MAKE_CHAR (scm_i_string_chars (str)[idx]); | |
1197 | else | |
1198 | return SCM_MAKE_CHAR (scm_i_string_wide_chars (str)[idx]); | |
0f2d19dd | 1199 | } |
1bbd0b84 | 1200 | #undef FUNC_NAME |
0f2d19dd | 1201 | |
3ee86942 MV |
1202 | SCM |
1203 | scm_c_string_ref (SCM str, size_t p) | |
1204 | { | |
1205 | if (p >= scm_i_string_length (str)) | |
1206 | scm_out_of_range (NULL, scm_from_size_t (p)); | |
9c44cd45 MG |
1207 | if (scm_i_is_narrow_string (str)) |
1208 | return SCM_MAKE_CHAR (scm_i_string_chars (str)[p]); | |
1209 | else | |
1210 | return SCM_MAKE_CHAR (scm_i_string_wide_chars (str)[p]); | |
1211 | ||
3ee86942 | 1212 | } |
f0942910 | 1213 | |
3b3b36dd | 1214 | SCM_DEFINE (scm_string_set_x, "string-set!", 3, 0, 0, |
6fa73e72 | 1215 | (SCM str, SCM k, SCM chr), |
9c44cd45 MG |
1216 | "Store @var{chr} in element @var{k} of @var{str} and return\n" |
1217 | "an unspecified value. @var{k} must be a valid index of\n" | |
1218 | "@var{str}.") | |
1bbd0b84 | 1219 | #define FUNC_NAME s_scm_string_set_x |
0f2d19dd | 1220 | { |
3ae3166b | 1221 | size_t len; |
a55c2b68 MV |
1222 | unsigned long idx; |
1223 | ||
f0942910 | 1224 | SCM_VALIDATE_STRING (1, str); |
3ae3166b LC |
1225 | |
1226 | len = scm_i_string_length (str); | |
1227 | if (SCM_LIKELY (len > 0)) | |
1228 | idx = scm_to_unsigned_integer (k, 0, len - 1); | |
1229 | else | |
1230 | scm_out_of_range (NULL, k); | |
1231 | ||
34d19ef6 | 1232 | SCM_VALIDATE_CHAR (3, chr); |
9c44cd45 MG |
1233 | str = scm_i_string_start_writing (str); |
1234 | scm_i_string_set_x (str, idx, SCM_CHAR (chr)); | |
1235 | scm_i_string_stop_writing (); | |
1236 | ||
0f2d19dd JB |
1237 | return SCM_UNSPECIFIED; |
1238 | } | |
1bbd0b84 | 1239 | #undef FUNC_NAME |
0f2d19dd | 1240 | |
3ee86942 MV |
1241 | void |
1242 | scm_c_string_set_x (SCM str, size_t p, SCM chr) | |
1243 | { | |
1244 | if (p >= scm_i_string_length (str)) | |
1245 | scm_out_of_range (NULL, scm_from_size_t (p)); | |
9c44cd45 MG |
1246 | str = scm_i_string_start_writing (str); |
1247 | scm_i_string_set_x (str, p, SCM_CHAR (chr)); | |
1248 | scm_i_string_stop_writing (); | |
3ee86942 | 1249 | } |
0f2d19dd | 1250 | |
3b3b36dd | 1251 | SCM_DEFINE (scm_substring, "substring", 2, 1, 0, |
0d26a824 MG |
1252 | (SCM str, SCM start, SCM end), |
1253 | "Return a newly allocated string formed from the characters\n" | |
1254 | "of @var{str} beginning with index @var{start} (inclusive) and\n" | |
1255 | "ending with index @var{end} (exclusive).\n" | |
1256 | "@var{str} must be a string, @var{start} and @var{end} must be\n" | |
1257 | "exact integers satisfying:\n\n" | |
1258 | "0 <= @var{start} <= @var{end} <= (string-length @var{str}).") | |
1bbd0b84 | 1259 | #define FUNC_NAME s_scm_substring |
0f2d19dd | 1260 | { |
3ee86942 | 1261 | size_t len, from, to; |
685c0d71 | 1262 | |
d1ca2c64 | 1263 | SCM_VALIDATE_STRING (1, str); |
3ee86942 MV |
1264 | len = scm_i_string_length (str); |
1265 | from = scm_to_unsigned_integer (start, 0, len); | |
a55c2b68 | 1266 | if (SCM_UNBNDP (end)) |
3ee86942 | 1267 | to = len; |
a55c2b68 | 1268 | else |
3ee86942 MV |
1269 | to = scm_to_unsigned_integer (end, from, len); |
1270 | return scm_i_substring (str, from, to); | |
0f2d19dd | 1271 | } |
1bbd0b84 | 1272 | #undef FUNC_NAME |
0f2d19dd | 1273 | |
ed35de72 MV |
1274 | SCM_DEFINE (scm_substring_read_only, "substring/read-only", 2, 1, 0, |
1275 | (SCM str, SCM start, SCM end), | |
1276 | "Return a newly allocated string formed from the characters\n" | |
1277 | "of @var{str} beginning with index @var{start} (inclusive) and\n" | |
1278 | "ending with index @var{end} (exclusive).\n" | |
1279 | "@var{str} must be a string, @var{start} and @var{end} must be\n" | |
1280 | "exact integers satisfying:\n" | |
1281 | "\n" | |
1282 | "0 <= @var{start} <= @var{end} <= (string-length @var{str}).\n" | |
1283 | "\n" | |
1284 | "The returned string is read-only.\n") | |
1285 | #define FUNC_NAME s_scm_substring_read_only | |
1286 | { | |
1287 | size_t len, from, to; | |
1288 | ||
1289 | SCM_VALIDATE_STRING (1, str); | |
1290 | len = scm_i_string_length (str); | |
1291 | from = scm_to_unsigned_integer (start, 0, len); | |
1292 | if (SCM_UNBNDP (end)) | |
1293 | to = len; | |
1294 | else | |
1295 | to = scm_to_unsigned_integer (end, from, len); | |
1296 | return scm_i_substring_read_only (str, from, to); | |
1297 | } | |
1298 | #undef FUNC_NAME | |
1299 | ||
3ee86942 MV |
1300 | SCM_DEFINE (scm_substring_copy, "substring/copy", 2, 1, 0, |
1301 | (SCM str, SCM start, SCM end), | |
1302 | "Return a newly allocated string formed from the characters\n" | |
1303 | "of @var{str} beginning with index @var{start} (inclusive) and\n" | |
1304 | "ending with index @var{end} (exclusive).\n" | |
1305 | "@var{str} must be a string, @var{start} and @var{end} must be\n" | |
1306 | "exact integers satisfying:\n\n" | |
1307 | "0 <= @var{start} <= @var{end} <= (string-length @var{str}).") | |
1308 | #define FUNC_NAME s_scm_substring_copy | |
1309 | { | |
e1b29f6a MV |
1310 | /* For the Scheme version, START is mandatory, but for the C |
1311 | version, it is optional. See scm_string_copy in srfi-13.c for a | |
1312 | rationale. | |
1313 | */ | |
1314 | ||
1315 | size_t from, to; | |
3ee86942 MV |
1316 | |
1317 | SCM_VALIDATE_STRING (1, str); | |
e1b29f6a MV |
1318 | scm_i_get_substring_spec (scm_i_string_length (str), |
1319 | start, &from, end, &to); | |
3ee86942 MV |
1320 | return scm_i_substring_copy (str, from, to); |
1321 | } | |
1322 | #undef FUNC_NAME | |
1323 | ||
1324 | SCM_DEFINE (scm_substring_shared, "substring/shared", 2, 1, 0, | |
1325 | (SCM str, SCM start, SCM end), | |
1326 | "Return string that indirectly refers to the characters\n" | |
1327 | "of @var{str} beginning with index @var{start} (inclusive) and\n" | |
1328 | "ending with index @var{end} (exclusive).\n" | |
1329 | "@var{str} must be a string, @var{start} and @var{end} must be\n" | |
1330 | "exact integers satisfying:\n\n" | |
1331 | "0 <= @var{start} <= @var{end} <= (string-length @var{str}).") | |
1332 | #define FUNC_NAME s_scm_substring_shared | |
1333 | { | |
1334 | size_t len, from, to; | |
1335 | ||
1336 | SCM_VALIDATE_STRING (1, str); | |
1337 | len = scm_i_string_length (str); | |
1338 | from = scm_to_unsigned_integer (start, 0, len); | |
1339 | if (SCM_UNBNDP (end)) | |
1340 | to = len; | |
1341 | else | |
1342 | to = scm_to_unsigned_integer (end, from, len); | |
1343 | return scm_i_substring_shared (str, from, to); | |
1344 | } | |
1345 | #undef FUNC_NAME | |
685c0d71 | 1346 | |
3b3b36dd | 1347 | SCM_DEFINE (scm_string_append, "string-append", 0, 0, 1, |
6fa73e72 | 1348 | (SCM args), |
9c44cd45 | 1349 | "Return a newly allocated string whose characters form the\n" |
0d26a824 | 1350 | "concatenation of the given strings, @var{args}.") |
1bbd0b84 | 1351 | #define FUNC_NAME s_scm_string_append |
0f2d19dd JB |
1352 | { |
1353 | SCM res; | |
9c44cd45 MG |
1354 | size_t len = 0; |
1355 | int wide = 0; | |
c829a427 | 1356 | SCM l, s; |
bd4911ef | 1357 | size_t i; |
9909c395 MG |
1358 | union |
1359 | { | |
1360 | char *narrow; | |
1361 | scm_t_wchar *wide; | |
1362 | } data; | |
af45e3b0 DH |
1363 | |
1364 | SCM_VALIDATE_REST_ARGUMENT (args); | |
9c44cd45 | 1365 | for (l = args; !scm_is_null (l); l = SCM_CDR (l)) |
c829a427 MV |
1366 | { |
1367 | s = SCM_CAR (l); | |
1368 | SCM_VALIDATE_STRING (SCM_ARGn, s); | |
9c44cd45 MG |
1369 | len += scm_i_string_length (s); |
1370 | if (!scm_i_is_narrow_string (s)) | |
1371 | wide = 1; | |
c829a427 | 1372 | } |
9909c395 | 1373 | data.narrow = NULL; |
9c44cd45 | 1374 | if (!wide) |
9909c395 | 1375 | res = scm_i_make_string (len, &data.narrow); |
9c44cd45 | 1376 | else |
9909c395 | 1377 | res = scm_i_make_wide_string (len, &data.wide); |
9c44cd45 MG |
1378 | |
1379 | for (l = args; !scm_is_null (l); l = SCM_CDR (l)) | |
c829a427 | 1380 | { |
edea856c | 1381 | size_t len; |
c829a427 | 1382 | s = SCM_CAR (l); |
3ee86942 | 1383 | SCM_VALIDATE_STRING (SCM_ARGn, s); |
edea856c | 1384 | len = scm_i_string_length (s); |
9c44cd45 MG |
1385 | if (!wide) |
1386 | { | |
9909c395 MG |
1387 | memcpy (data.narrow, scm_i_string_chars (s), len); |
1388 | data.narrow += len; | |
9c44cd45 MG |
1389 | } |
1390 | else | |
1391 | { | |
1392 | if (scm_i_is_narrow_string (s)) | |
1393 | { | |
1394 | for (i = 0; i < scm_i_string_length (s); i++) | |
9909c395 | 1395 | data.wide[i] = (unsigned char) scm_i_string_chars (s)[i]; |
9c44cd45 MG |
1396 | } |
1397 | else | |
9909c395 | 1398 | u32_cpy ((scm_t_uint32 *) data.wide, |
9c44cd45 | 1399 | (scm_t_uint32 *) scm_i_string_wide_chars (s), len); |
9909c395 | 1400 | data.wide += len; |
9c44cd45 | 1401 | } |
c829a427 MV |
1402 | scm_remember_upto_here_1 (s); |
1403 | } | |
0f2d19dd JB |
1404 | return res; |
1405 | } | |
1bbd0b84 | 1406 | #undef FUNC_NAME |
0f2d19dd | 1407 | |
24933780 | 1408 | |
a3d7d5d5 LC |
1409 | \f |
1410 | /* Conversion to/from other encodings. */ | |
1411 | ||
1412 | SCM_SYMBOL (scm_encoding_error_key, "encoding-error"); | |
d14418a5 | 1413 | void |
ef7e4ba3 LC |
1414 | scm_encoding_error (const char *subr, int err, const char *message, |
1415 | const char *from, const char *to, SCM string_or_bv) | |
1416 | { | |
1417 | /* Raise an exception that conveys all the information needed to debug the | |
1418 | problem. Only perform locale conversions that are safe; in particular, | |
1419 | don't try to display STRING_OR_BV when it's a string since converting it to | |
1420 | the output locale may fail. */ | |
1421 | scm_throw (scm_encoding_error_key, | |
1422 | scm_list_n (scm_from_locale_string (subr), | |
1423 | scm_from_locale_string (message), | |
1424 | scm_from_int (err), | |
1425 | scm_from_locale_string (from), | |
1426 | scm_from_locale_string (to), | |
1427 | string_or_bv, | |
1428 | SCM_UNDEFINED)); | |
a3d7d5d5 LC |
1429 | } |
1430 | ||
fac32b51 | 1431 | SCM |
587a3355 MG |
1432 | scm_from_stringn (const char *str, size_t len, const char *encoding, |
1433 | scm_t_string_failed_conversion_handler handler) | |
1434 | { | |
1435 | size_t u32len, i; | |
1436 | scm_t_wchar *u32; | |
1437 | int wide = 0; | |
1438 | SCM res; | |
1439 | ||
fac32b51 MG |
1440 | if (len == 0) |
1441 | return scm_nullstr; | |
1442 | ||
889975e5 MG |
1443 | if (encoding == NULL) |
1444 | { | |
1445 | /* If encoding is null, use Latin-1. */ | |
1446 | char *buf; | |
1447 | res = scm_i_make_string (len, &buf); | |
1448 | memcpy (buf, str, len); | |
1449 | return res; | |
1450 | } | |
1451 | ||
587a3355 MG |
1452 | u32len = 0; |
1453 | u32 = (scm_t_wchar *) u32_conv_from_encoding (encoding, | |
1454 | (enum iconv_ilseq_handler) | |
1455 | handler, | |
1456 | str, len, | |
1457 | NULL, | |
1458 | NULL, &u32len); | |
1459 | ||
ef7e4ba3 | 1460 | if (SCM_UNLIKELY (u32 == NULL)) |
587a3355 | 1461 | { |
ef7e4ba3 LC |
1462 | /* Raise an error and pass the raw C string as a bytevector to the `throw' |
1463 | handler. */ | |
1464 | SCM bv; | |
1465 | signed char *buf; | |
1466 | ||
1467 | buf = scm_gc_malloc_pointerless (len, "bytevector"); | |
1468 | memcpy (buf, str, len); | |
1469 | bv = scm_c_take_bytevector (buf, len); | |
1470 | ||
1471 | scm_encoding_error (__func__, errno, | |
1472 | "input locale conversion error", | |
1473 | encoding, "UTF-32", bv); | |
587a3355 MG |
1474 | } |
1475 | ||
1476 | i = 0; | |
1477 | while (i < u32len) | |
1478 | if (u32[i++] > 0xFF) | |
1479 | { | |
1480 | wide = 1; | |
1481 | break; | |
1482 | } | |
1483 | ||
1484 | if (!wide) | |
1485 | { | |
1486 | char *dst; | |
1487 | res = scm_i_make_string (u32len, &dst); | |
1488 | for (i = 0; i < u32len; i ++) | |
1489 | dst[i] = (unsigned char) u32[i]; | |
1490 | dst[u32len] = '\0'; | |
1491 | } | |
1492 | else | |
1493 | { | |
1494 | scm_t_wchar *wdst; | |
1495 | res = scm_i_make_wide_string (u32len, &wdst); | |
1496 | u32_cpy ((scm_t_uint32 *) wdst, (scm_t_uint32 *) u32, u32len); | |
1497 | wdst[u32len] = 0; | |
1498 | } | |
1499 | ||
1500 | free (u32); | |
1501 | return res; | |
1502 | } | |
1503 | ||
cf313a94 MG |
1504 | SCM |
1505 | scm_from_latin1_stringn (const char *str, size_t len) | |
1506 | { | |
1507 | return scm_from_stringn (str, len, NULL, SCM_FAILED_CONVERSION_ERROR); | |
1508 | } | |
1509 | ||
c829a427 MV |
1510 | SCM |
1511 | scm_from_locale_stringn (const char *str, size_t len) | |
1512 | { | |
889975e5 MG |
1513 | const char *enc; |
1514 | scm_t_string_failed_conversion_handler hndl; | |
1515 | SCM inport; | |
1516 | scm_t_port *pt; | |
4d4528e7 | 1517 | |
9c44cd45 | 1518 | if (len == (size_t) -1) |
c829a427 | 1519 | len = strlen (str); |
9c44cd45 MG |
1520 | if (len == 0) |
1521 | return scm_nullstr; | |
1522 | ||
889975e5 MG |
1523 | inport = scm_current_input_port (); |
1524 | if (!SCM_UNBNDP (inport) && SCM_OPINPORTP (inport)) | |
1525 | { | |
1526 | pt = SCM_PTAB_ENTRY (inport); | |
1527 | enc = pt->encoding; | |
1528 | hndl = pt->ilseq_handler; | |
1529 | } | |
1530 | else | |
1531 | { | |
1532 | enc = NULL; | |
1533 | hndl = SCM_FAILED_CONVERSION_ERROR; | |
1534 | } | |
1535 | ||
1536 | return scm_from_stringn (str, len, enc, hndl); | |
c829a427 | 1537 | } |
4d4528e7 | 1538 | |
c829a427 MV |
1539 | SCM |
1540 | scm_from_locale_string (const char *str) | |
4d4528e7 | 1541 | { |
9c44cd45 MG |
1542 | if (str == NULL) |
1543 | return scm_nullstr; | |
1544 | ||
c829a427 MV |
1545 | return scm_from_locale_stringn (str, -1); |
1546 | } | |
4d4528e7 | 1547 | |
587a3355 MG |
1548 | SCM |
1549 | scm_i_from_utf8_string (const scm_t_uint8 *str) | |
1550 | { | |
1551 | return scm_from_stringn ((const char *) str, | |
1552 | strlen ((char *) str), "UTF-8", | |
1553 | SCM_FAILED_CONVERSION_ERROR); | |
1554 | } | |
1555 | ||
50b1996f MG |
1556 | /* Create a new scheme string from the C string STR. The memory of |
1557 | STR may be used directly as storage for the new string. */ | |
13a94556 LC |
1558 | /* FIXME: GC-wise, the only way to use the memory area pointed to by STR |
1559 | would be to register a finalizer to eventually free(3) STR, which isn't | |
1560 | worth it. Should we just deprecate the `scm_take_' functions? */ | |
c829a427 MV |
1561 | SCM |
1562 | scm_take_locale_stringn (char *str, size_t len) | |
1563 | { | |
13a94556 | 1564 | SCM res; |
48ddf0d9 | 1565 | |
13a94556 LC |
1566 | res = scm_from_locale_stringn (str, len); |
1567 | free (str); | |
c829a427 | 1568 | |
c829a427 MV |
1569 | return res; |
1570 | } | |
1571 | ||
48ddf0d9 KR |
1572 | SCM |
1573 | scm_take_locale_string (char *str) | |
1574 | { | |
1575 | return scm_take_locale_stringn (str, -1); | |
1576 | } | |
1577 | ||
f1ee6d54 LC |
1578 | /* Change libunistring escapes (`\uXXXX' and `\UXXXXXXXX') in BUF, a |
1579 | *LENP-byte locale-encoded string, to `\xXX', `\uXXXX', or `\UXXXXXX'. | |
1580 | Set *LENP to the size of the resulting string. */ | |
4ff2b9f4 LC |
1581 | void |
1582 | scm_i_unistring_escapes_to_guile_escapes (char *buf, size_t *lenp) | |
9c44cd45 MG |
1583 | { |
1584 | char *before, *after; | |
1585 | size_t i, j; | |
1586 | ||
4ff2b9f4 LC |
1587 | before = buf; |
1588 | after = buf; | |
9c44cd45 MG |
1589 | i = 0; |
1590 | j = 0; | |
1591 | while (i < *lenp) | |
1592 | { | |
1593 | if ((i <= *lenp - 6) | |
1594 | && before[i] == '\\' | |
1595 | && before[i + 1] == 'u' | |
1596 | && before[i + 2] == '0' && before[i + 3] == '0') | |
1597 | { | |
1598 | /* Convert \u00NN to \xNN */ | |
1599 | after[j] = '\\'; | |
1600 | after[j + 1] = 'x'; | |
30a6b9ca MG |
1601 | after[j + 2] = tolower ((int) before[i + 4]); |
1602 | after[j + 3] = tolower ((int) before[i + 5]); | |
9c44cd45 MG |
1603 | i += 6; |
1604 | j += 4; | |
1605 | } | |
1606 | else if ((i <= *lenp - 10) | |
1607 | && before[i] == '\\' | |
1608 | && before[i + 1] == 'U' | |
1609 | && before[i + 2] == '0' && before[i + 3] == '0') | |
1610 | { | |
1611 | /* Convert \U00NNNNNN to \UNNNNNN */ | |
1612 | after[j] = '\\'; | |
1613 | after[j + 1] = 'U'; | |
30a6b9ca MG |
1614 | after[j + 2] = tolower ((int) before[i + 4]); |
1615 | after[j + 3] = tolower ((int) before[i + 5]); | |
1616 | after[j + 4] = tolower ((int) before[i + 6]); | |
1617 | after[j + 5] = tolower ((int) before[i + 7]); | |
1618 | after[j + 6] = tolower ((int) before[i + 8]); | |
1619 | after[j + 7] = tolower ((int) before[i + 9]); | |
9c44cd45 MG |
1620 | i += 10; |
1621 | j += 8; | |
1622 | } | |
1623 | else | |
1624 | { | |
1625 | after[j] = before[i]; | |
1626 | i++; | |
1627 | j++; | |
1628 | } | |
1629 | } | |
1630 | *lenp = j; | |
9c44cd45 MG |
1631 | } |
1632 | ||
f1ee6d54 LC |
1633 | /* Change libunistring escapes (`\uXXXX' and `\UXXXXXXXX') in BUF, a |
1634 | *LENP-byte locale-encoded string, to `\xXXXX;'. Set *LEN to the size | |
1635 | of the resulting string. BUF must be large enough to handle the | |
1636 | worst case when `\uXXXX' escapes (6 characters) are replaced by | |
1637 | `\xXXXX;' (7 characters). */ | |
4ff2b9f4 LC |
1638 | void |
1639 | scm_i_unistring_escapes_to_r6rs_escapes (char *buf, size_t *lenp) | |
d31b9519 MG |
1640 | { |
1641 | char *before, *after; | |
1642 | size_t i, j; | |
1643 | /* The worst case is if the input string contains all 4-digit hex escapes. | |
1644 | "\uXXXX" (six characters) becomes "\xXXXX;" (seven characters) */ | |
1645 | size_t max_out_len = (*lenp * 7) / 6 + 1; | |
1646 | size_t nzeros, ndigits; | |
1647 | ||
4ff2b9f4 | 1648 | before = buf; |
d31b9519 MG |
1649 | after = alloca (max_out_len); |
1650 | i = 0; | |
1651 | j = 0; | |
1652 | while (i < *lenp) | |
1653 | { | |
1654 | if (((i <= *lenp - 6) && before[i] == '\\' && before[i + 1] == 'u') | |
1655 | || ((i <= *lenp - 10) && before[i] == '\\' && before[i + 1] == 'U')) | |
1656 | { | |
1657 | if (before[i + 1] == 'u') | |
1658 | ndigits = 4; | |
1659 | else if (before[i + 1] == 'U') | |
1660 | ndigits = 8; | |
1661 | else | |
1662 | abort (); | |
1663 | ||
1664 | /* Add the R6RS hex escape initial sequence. */ | |
1665 | after[j] = '\\'; | |
1666 | after[j + 1] = 'x'; | |
1667 | ||
1668 | /* Move string positions to the start of the hex numbers. */ | |
1669 | i += 2; | |
1670 | j += 2; | |
1671 | ||
1672 | /* Find the number of initial zeros in this hex number. */ | |
1673 | nzeros = 0; | |
1674 | while (before[i + nzeros] == '0' && nzeros < ndigits) | |
1675 | nzeros++; | |
1676 | ||
1677 | /* Copy the number, skipping initial zeros, and then move the string | |
1678 | positions. */ | |
1679 | if (nzeros == ndigits) | |
1680 | { | |
1681 | after[j] = '0'; | |
1682 | i += ndigits; | |
1683 | j += 1; | |
1684 | } | |
1685 | else | |
1686 | { | |
1687 | int pos; | |
1688 | for (pos = 0; pos < ndigits - nzeros; pos++) | |
1689 | after[j + pos] = tolower ((int) before[i + nzeros + pos]); | |
1690 | i += ndigits; | |
1691 | j += (ndigits - nzeros); | |
1692 | } | |
1693 | ||
1694 | /* Add terminating semicolon. */ | |
1695 | after[j] = ';'; | |
1696 | j++; | |
1697 | } | |
1698 | else | |
1699 | { | |
1700 | after[j] = before[i]; | |
1701 | i++; | |
1702 | j++; | |
1703 | } | |
1704 | } | |
1705 | *lenp = j; | |
d31b9519 MG |
1706 | memcpy (before, after, j); |
1707 | } | |
1708 | ||
cf313a94 MG |
1709 | char * |
1710 | scm_to_latin1_stringn (SCM str, size_t *lenp) | |
1711 | { | |
1712 | return scm_to_stringn (str, lenp, NULL, SCM_FAILED_CONVERSION_ERROR); | |
1713 | } | |
d31b9519 | 1714 | |
c829a427 | 1715 | char * |
fac32b51 | 1716 | scm_to_locale_stringn (SCM str, size_t *lenp) |
c829a427 | 1717 | { |
889975e5 MG |
1718 | SCM outport; |
1719 | scm_t_port *pt; | |
9c44cd45 MG |
1720 | const char *enc; |
1721 | ||
889975e5 MG |
1722 | outport = scm_current_output_port (); |
1723 | if (!SCM_UNBNDP (outport) && SCM_OPOUTPORTP (outport)) | |
1724 | { | |
1725 | pt = SCM_PTAB_ENTRY (outport); | |
1726 | enc = pt->encoding; | |
1727 | } | |
1728 | else | |
1729 | enc = NULL; | |
9c44cd45 | 1730 | |
889975e5 MG |
1731 | return scm_to_stringn (str, lenp, |
1732 | enc, | |
1733 | scm_i_get_conversion_strategy (SCM_BOOL_F)); | |
9c44cd45 MG |
1734 | } |
1735 | ||
29bcdbb0 LC |
1736 | /* Return a malloc(3)-allocated buffer containing the contents of STR encoded |
1737 | according to ENCODING. If LENP is non-NULL, set it to the size in bytes of | |
1738 | the returned buffer. If the conversion to ENCODING fails, apply the strategy | |
1739 | defined by HANDLER. */ | |
9c44cd45 | 1740 | char * |
587a3355 | 1741 | scm_to_stringn (SCM str, size_t *lenp, const char *encoding, |
eca29b02 | 1742 | scm_t_string_failed_conversion_handler handler) |
9c44cd45 | 1743 | { |
9c44cd45 MG |
1744 | char *buf; |
1745 | size_t ilen, len, i; | |
889975e5 MG |
1746 | int ret; |
1747 | const char *enc; | |
4d4528e7 | 1748 | |
3ee86942 | 1749 | if (!scm_is_string (str)) |
c829a427 | 1750 | scm_wrong_type_arg_msg (NULL, 0, str, "string"); |
9c44cd45 MG |
1751 | ilen = scm_i_string_length (str); |
1752 | ||
1753 | if (ilen == 0) | |
1754 | { | |
1755 | buf = scm_malloc (1); | |
1756 | buf[0] = '\0'; | |
1757 | if (lenp) | |
1758 | *lenp = 0; | |
1759 | return buf; | |
1760 | } | |
587a3355 | 1761 | |
c829a427 | 1762 | if (lenp == NULL) |
9c44cd45 MG |
1763 | for (i = 0; i < ilen; i++) |
1764 | if (scm_i_string_ref (str, i) == '\0') | |
1765 | scm_misc_error (NULL, | |
1766 | "string contains #\\nul character: ~S", | |
1767 | scm_list_1 (str)); | |
1768 | ||
889975e5 | 1769 | if (scm_i_is_narrow_string (str) && (encoding == NULL)) |
c829a427 | 1770 | { |
889975e5 MG |
1771 | /* If using native Latin-1 encoding, just copy the string |
1772 | contents. */ | |
9c44cd45 MG |
1773 | if (lenp) |
1774 | { | |
1775 | buf = scm_malloc (ilen); | |
1776 | memcpy (buf, scm_i_string_chars (str), ilen); | |
1777 | *lenp = ilen; | |
1778 | return buf; | |
1779 | } | |
1780 | else | |
1781 | { | |
1782 | buf = scm_malloc (ilen + 1); | |
1783 | memcpy (buf, scm_i_string_chars (str), ilen); | |
1784 | buf[ilen] = '\0'; | |
1785 | return buf; | |
1786 | } | |
c829a427 | 1787 | } |
9c44cd45 | 1788 | |
587a3355 | 1789 | |
9c44cd45 MG |
1790 | buf = NULL; |
1791 | len = 0; | |
889975e5 MG |
1792 | enc = encoding; |
1793 | if (enc == NULL) | |
1794 | enc = "ISO-8859-1"; | |
1795 | if (scm_i_is_narrow_string (str)) | |
1796 | { | |
1797 | ret = mem_iconveh (scm_i_string_chars (str), ilen, | |
1798 | "ISO-8859-1", enc, | |
1799 | (enum iconv_ilseq_handler) handler, NULL, | |
1800 | &buf, &len); | |
9c44cd45 | 1801 | |
889975e5 | 1802 | if (ret != 0) |
ef7e4ba3 LC |
1803 | scm_encoding_error (__func__, errno, |
1804 | "cannot convert to output locale", | |
1805 | "ISO-8859-1", enc, str); | |
889975e5 MG |
1806 | } |
1807 | else | |
1808 | { | |
d31b9519 | 1809 | buf = u32_conv_to_encoding (enc, |
889975e5 | 1810 | (enum iconv_ilseq_handler) handler, |
d31b9519 | 1811 | (scm_t_uint32 *) scm_i_string_wide_chars (str), |
889975e5 MG |
1812 | ilen, |
1813 | NULL, | |
1814 | NULL, &len); | |
1815 | if (buf == NULL) | |
ef7e4ba3 LC |
1816 | scm_encoding_error (__func__, errno, |
1817 | "cannot convert to output locale", | |
1818 | "UTF-32", enc, str); | |
d31b9519 MG |
1819 | } |
1820 | if (handler == SCM_FAILED_CONVERSION_ESCAPE_SEQUENCE) | |
1821 | { | |
1822 | if (SCM_R6RS_ESCAPES_P) | |
f1ee6d54 LC |
1823 | { |
1824 | /* The worst case is if the input string contains all 4-digit | |
1825 | hex escapes. "\uXXXX" (six characters) becomes "\xXXXX;" | |
1826 | (seven characters). Make BUF large enough to hold | |
1827 | that. */ | |
1828 | buf = scm_realloc (buf, (len * 7) / 6 + 1); | |
1829 | scm_i_unistring_escapes_to_r6rs_escapes (buf, &len); | |
1830 | } | |
d31b9519 | 1831 | else |
4ff2b9f4 LC |
1832 | scm_i_unistring_escapes_to_guile_escapes (buf, &len); |
1833 | ||
1834 | buf = scm_realloc (buf, len); | |
889975e5 | 1835 | } |
9c44cd45 | 1836 | if (lenp) |
4d4528e7 | 1837 | *lenp = len; |
9c44cd45 MG |
1838 | else |
1839 | { | |
1840 | buf = scm_realloc (buf, len + 1); | |
1841 | buf[len] = '\0'; | |
1842 | } | |
24933780 | 1843 | |
c829a427 | 1844 | scm_remember_upto_here_1 (str); |
9c44cd45 | 1845 | return buf; |
4d4528e7 | 1846 | } |
af68e5e5 | 1847 | |
c829a427 MV |
1848 | char * |
1849 | scm_to_locale_string (SCM str) | |
1850 | { | |
1851 | return scm_to_locale_stringn (str, NULL); | |
1852 | } | |
af68e5e5 | 1853 | |
587a3355 MG |
1854 | scm_t_uint8 * |
1855 | scm_i_to_utf8_string (SCM str) | |
1856 | { | |
1857 | char *u8str; | |
1858 | u8str = scm_to_stringn (str, NULL, "UTF-8", SCM_FAILED_CONVERSION_ERROR); | |
1859 | return (scm_t_uint8 *) u8str; | |
1860 | } | |
1861 | ||
c829a427 MV |
1862 | size_t |
1863 | scm_to_locale_stringbuf (SCM str, char *buf, size_t max_len) | |
1864 | { | |
1865 | size_t len; | |
9c44cd45 | 1866 | char *result = NULL; |
3ee86942 | 1867 | if (!scm_is_string (str)) |
c829a427 | 1868 | scm_wrong_type_arg_msg (NULL, 0, str, "string"); |
9c44cd45 MG |
1869 | result = scm_to_locale_stringn (str, &len); |
1870 | ||
1871 | memcpy (buf, result, (len > max_len) ? max_len : len); | |
1872 | free (result); | |
1873 | ||
c829a427 MV |
1874 | scm_remember_upto_here_1 (str); |
1875 | return len; | |
1876 | } | |
af68e5e5 | 1877 | |
a3d7d5d5 LC |
1878 | \f |
1879 | /* Unicode string normalization. */ | |
1880 | ||
edb7bb47 JG |
1881 | /* This function is a partial clone of SCM_STRING_TO_U32_BUF from |
1882 | libguile/i18n.c. It would be useful to have this factored out into a more | |
1883 | convenient location, but its use of alloca makes that tricky to do. */ | |
1884 | ||
1885 | static SCM | |
1886 | normalize_str (SCM string, uninorm_t form) | |
1887 | { | |
1888 | SCM ret; | |
1889 | scm_t_uint32 *w_str; | |
1890 | scm_t_wchar *cbuf; | |
1891 | size_t rlen, len = scm_i_string_length (string); | |
1892 | ||
1893 | if (scm_i_is_narrow_string (string)) | |
1894 | { | |
1895 | size_t i; | |
1896 | const char *buf = scm_i_string_chars (string); | |
1897 | ||
1898 | w_str = alloca (sizeof (scm_t_wchar) * (len + 1)); | |
1899 | ||
1900 | for (i = 0; i < len; i ++) | |
1901 | w_str[i] = (unsigned char) buf[i]; | |
1902 | w_str[len] = 0; | |
1903 | } | |
d8164b04 JG |
1904 | else |
1905 | w_str = (scm_t_uint32 *) scm_i_string_wide_chars (string); | |
1906 | ||
edb7bb47 JG |
1907 | w_str = u32_normalize (form, w_str, len, NULL, &rlen); |
1908 | ||
1909 | ret = scm_i_make_wide_string (rlen, &cbuf); | |
1910 | u32_cpy ((scm_t_uint32 *) cbuf, w_str, rlen); | |
1911 | free (w_str); | |
d8164b04 JG |
1912 | |
1913 | scm_i_try_narrow_string (ret); | |
1914 | ||
edb7bb47 JG |
1915 | return ret; |
1916 | } | |
1917 | ||
1918 | SCM_DEFINE (scm_string_normalize_nfc, "string-normalize-nfc", 1, 0, 0, | |
1919 | (SCM string), | |
1920 | "Returns the NFC normalized form of @var{string}.") | |
1921 | #define FUNC_NAME s_scm_string_normalize_nfc | |
1922 | { | |
1923 | SCM_VALIDATE_STRING (1, string); | |
1924 | return normalize_str (string, UNINORM_NFC); | |
1925 | } | |
1926 | #undef FUNC_NAME | |
1927 | ||
1928 | SCM_DEFINE (scm_string_normalize_nfd, "string-normalize-nfd", 1, 0, 0, | |
1929 | (SCM string), | |
1930 | "Returns the NFD normalized form of @var{string}.") | |
1931 | #define FUNC_NAME s_scm_string_normalize_nfd | |
1932 | { | |
1933 | SCM_VALIDATE_STRING (1, string); | |
1934 | return normalize_str (string, UNINORM_NFD); | |
1935 | } | |
1936 | #undef FUNC_NAME | |
1937 | ||
1938 | SCM_DEFINE (scm_string_normalize_nfkc, "string-normalize-nfkc", 1, 0, 0, | |
1939 | (SCM string), | |
1940 | "Returns the NFKC normalized form of @var{string}.") | |
1941 | #define FUNC_NAME s_scm_string_normalize_nfkc | |
1942 | { | |
1943 | SCM_VALIDATE_STRING (1, string); | |
1944 | return normalize_str (string, UNINORM_NFKC); | |
1945 | } | |
1946 | #undef FUNC_NAME | |
1947 | ||
1948 | SCM_DEFINE (scm_string_normalize_nfkd, "string-normalize-nfkd", 1, 0, 0, | |
1949 | (SCM string), | |
1950 | "Returns the NFKD normalized form of @var{string}.") | |
1951 | #define FUNC_NAME s_scm_string_normalize_nfkd | |
1952 | { | |
1953 | SCM_VALIDATE_STRING (1, string); | |
1954 | return normalize_str (string, UNINORM_NFKD); | |
1955 | } | |
1956 | #undef FUNC_NAME | |
1957 | ||
3ee86942 MV |
1958 | /* converts C scm_array of strings to SCM scm_list of strings. */ |
1959 | /* If argc < 0, a null terminated scm_array is assumed. */ | |
9c44cd45 | 1960 | SCM |
3ee86942 MV |
1961 | scm_makfromstrs (int argc, char **argv) |
1962 | { | |
1963 | int i = argc; | |
1964 | SCM lst = SCM_EOL; | |
1965 | if (0 > i) | |
1966 | for (i = 0; argv[i]; i++); | |
1967 | while (i--) | |
1968 | lst = scm_cons (scm_from_locale_string (argv[i]), lst); | |
1969 | return lst; | |
1970 | } | |
1971 | ||
c829a427 MV |
1972 | /* Return a newly allocated array of char pointers to each of the strings |
1973 | in args, with a terminating NULL pointer. */ | |
1974 | ||
1975 | char ** | |
1976 | scm_i_allocate_string_pointers (SCM list) | |
2a776823 | 1977 | #define FUNC_NAME "scm_i_allocate_string_pointers" |
af68e5e5 | 1978 | { |
c829a427 MV |
1979 | char **result; |
1980 | int len = scm_ilength (list); | |
1981 | int i; | |
1982 | ||
1983 | if (len < 0) | |
1984 | scm_wrong_type_arg_msg (NULL, 0, list, "proper list"); | |
1985 | ||
2a776823 LC |
1986 | result = scm_gc_malloc ((len + 1) * sizeof (char *), |
1987 | "string pointers"); | |
c829a427 | 1988 | result[len] = NULL; |
c829a427 MV |
1989 | |
1990 | /* The list might be have been modified in another thread, so | |
1991 | we check LIST before each access. | |
1992 | */ | |
d2e53ed6 | 1993 | for (i = 0; i < len && scm_is_pair (list); i++) |
c829a427 | 1994 | { |
2a776823 LC |
1995 | SCM str; |
1996 | size_t len; | |
1997 | ||
1998 | str = SCM_CAR (list); | |
1999 | len = scm_c_string_length (str); | |
2000 | ||
2001 | result[i] = scm_gc_malloc_pointerless (len + 1, "string pointers"); | |
2002 | memcpy (result[i], scm_i_string_chars (str), len); | |
2003 | result[i][len] = '\0'; | |
2004 | ||
c829a427 MV |
2005 | list = SCM_CDR (list); |
2006 | } | |
2007 | ||
c829a427 | 2008 | return result; |
af68e5e5 | 2009 | } |
2a776823 | 2010 | #undef FUNC_NAME |
24933780 | 2011 | |
6f14f578 MV |
2012 | void |
2013 | scm_i_get_substring_spec (size_t len, | |
2014 | SCM start, size_t *cstart, | |
2015 | SCM end, size_t *cend) | |
2016 | { | |
2017 | if (SCM_UNBNDP (start)) | |
2018 | *cstart = 0; | |
2019 | else | |
2020 | *cstart = scm_to_unsigned_integer (start, 0, len); | |
2021 | ||
2022 | if (SCM_UNBNDP (end)) | |
2023 | *cend = len; | |
2024 | else | |
2025 | *cend = scm_to_unsigned_integer (end, *cstart, len); | |
2026 | } | |
2027 | ||
3ee86942 MV |
2028 | #if SCM_ENABLE_DEPRECATED |
2029 | ||
556d75db MV |
2030 | /* When these definitions are removed, it becomes reasonable to use |
2031 | read-only strings for string literals. For that, change the reader | |
2032 | to create string literals with scm_c_substring_read_only instead of | |
2033 | with scm_c_substring_copy. | |
2034 | */ | |
2035 | ||
3ee86942 | 2036 | int |
fe78c51a | 2037 | scm_i_deprecated_stringp (SCM str) |
3ee86942 MV |
2038 | { |
2039 | scm_c_issue_deprecation_warning | |
2040 | ("SCM_STRINGP is deprecated. Use scm_is_string instead."); | |
2041 | ||
2616f0e0 | 2042 | return scm_is_string (str); |
3ee86942 MV |
2043 | } |
2044 | ||
2045 | char * | |
fe78c51a | 2046 | scm_i_deprecated_string_chars (SCM str) |
3ee86942 MV |
2047 | { |
2048 | char *chars; | |
2049 | ||
2050 | scm_c_issue_deprecation_warning | |
2051 | ("SCM_STRING_CHARS is deprecated. See the manual for alternatives."); | |
2052 | ||
2616f0e0 MV |
2053 | /* We don't accept shared substrings here since they are not |
2054 | null-terminated. | |
2055 | */ | |
2056 | if (IS_SH_STRING (str)) | |
c291b588 LC |
2057 | scm_misc_error (NULL, |
2058 | "SCM_STRING_CHARS does not work with shared substrings", | |
2616f0e0 MV |
2059 | SCM_EOL); |
2060 | ||
877f06c3 | 2061 | /* We explicitly test for read-only strings to produce a better |
556d75db MV |
2062 | error message. |
2063 | */ | |
2064 | ||
2065 | if (IS_RO_STRING (str)) | |
c291b588 LC |
2066 | scm_misc_error (NULL, |
2067 | "SCM_STRING_CHARS does not work with read-only strings", | |
556d75db | 2068 | SCM_EOL); |
c291b588 | 2069 | |
2616f0e0 | 2070 | /* The following is still wrong, of course... |
3ee86942 | 2071 | */ |
9c44cd45 | 2072 | str = scm_i_string_start_writing (str); |
3ee86942 MV |
2073 | chars = scm_i_string_writable_chars (str); |
2074 | scm_i_string_stop_writing (); | |
2075 | return chars; | |
2076 | } | |
2077 | ||
2078 | size_t | |
fe78c51a | 2079 | scm_i_deprecated_string_length (SCM str) |
3ee86942 MV |
2080 | { |
2081 | scm_c_issue_deprecation_warning | |
2082 | ("SCM_STRING_LENGTH is deprecated. Use scm_c_string_length instead."); | |
2083 | return scm_c_string_length (str); | |
2084 | } | |
2085 | ||
2086 | #endif | |
2087 | ||
2a610be5 AW |
2088 | static SCM |
2089 | string_handle_ref (scm_t_array_handle *h, size_t index) | |
2090 | { | |
2091 | return scm_c_string_ref (h->array, index); | |
2092 | } | |
2093 | ||
2094 | static void | |
2095 | string_handle_set (scm_t_array_handle *h, size_t index, SCM val) | |
2096 | { | |
2097 | scm_c_string_set_x (h->array, index, val); | |
2098 | } | |
2099 | ||
2100 | static void | |
2101 | string_get_handle (SCM v, scm_t_array_handle *h) | |
2102 | { | |
2103 | h->array = v; | |
2104 | h->ndims = 1; | |
2105 | h->dims = &h->dim0; | |
2106 | h->dim0.lbnd = 0; | |
2107 | h->dim0.ubnd = scm_c_string_length (v) - 1; | |
2108 | h->dim0.inc = 1; | |
2109 | h->element_type = SCM_ARRAY_ELEMENT_TYPE_CHAR; | |
2110 | h->elements = h->writable_elements = NULL; | |
2111 | } | |
2112 | ||
c5f17102 | 2113 | SCM_ARRAY_IMPLEMENTATION (scm_tc7_string, 0x7f, |
2a610be5 | 2114 | string_handle_ref, string_handle_set, |
f65e0168 LC |
2115 | string_get_handle) |
2116 | SCM_VECTOR_IMPLEMENTATION (SCM_ARRAY_ELEMENT_TYPE_CHAR, scm_make_string) | |
2a610be5 | 2117 | |
0f2d19dd JB |
2118 | void |
2119 | scm_init_strings () | |
0f2d19dd | 2120 | { |
3ee86942 | 2121 | scm_nullstr = scm_i_make_string (0, NULL); |
7c33806a | 2122 | |
a0599745 | 2123 | #include "libguile/strings.x" |
0f2d19dd JB |
2124 | } |
2125 | ||
89e00824 ML |
2126 | |
2127 | /* | |
2128 | Local Variables: | |
2129 | c-file-style: "gnu" | |
2130 | End: | |
2131 | */ |