Commit | Line | Data |
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50b1996f | 1 | /* Copyright (C) 1995,1996,1998,2000,2001, 2004, 2006, 2008, 2009 Free Software Foundation, Inc. |
0f2d19dd | 2 | * |
73be1d9e | 3 | * This library is free software; you can redistribute it and/or |
53befeb7 NJ |
4 | * modify it under the terms of the GNU Lesser General Public License |
5 | * as published by the Free Software Foundation; either version 3 of | |
6 | * the License, or (at your option) any later version. | |
0f2d19dd | 7 | * |
53befeb7 NJ |
8 | * This library is distributed in the hope that it will be useful, but |
9 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
73be1d9e MV |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
11 | * Lesser General Public License for more details. | |
0f2d19dd | 12 | * |
73be1d9e MV |
13 | * You should have received a copy of the GNU Lesser General Public |
14 | * License along with this library; if not, write to the Free Software | |
53befeb7 NJ |
15 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
16 | * 02110-1301 USA | |
73be1d9e | 17 | */ |
1bbd0b84 | 18 | |
1bbd0b84 | 19 | |
0f2d19dd | 20 | \f |
dbb605f5 LC |
21 | #ifdef HAVE_CONFIG_H |
22 | # include <config.h> | |
23 | #endif | |
0f2d19dd | 24 | |
faf2c9d7 | 25 | #include <string.h> |
3ee86942 | 26 | #include <stdio.h> |
9c44cd45 MG |
27 | #include <ctype.h> |
28 | #include <unistr.h> | |
faf2c9d7 | 29 | |
a0599745 MD |
30 | #include "libguile/_scm.h" |
31 | #include "libguile/chars.h" | |
7c33806a | 32 | #include "libguile/root.h" |
a0599745 | 33 | #include "libguile/strings.h" |
1afff620 | 34 | #include "libguile/deprecation.h" |
a0599745 | 35 | #include "libguile/validate.h" |
c829a427 | 36 | #include "libguile/dynwind.h" |
1afff620 | 37 | |
0f2d19dd JB |
38 | \f |
39 | ||
40 | /* {Strings} | |
41 | */ | |
42 | ||
3ee86942 MV |
43 | |
44 | /* Stringbufs | |
45 | * | |
46 | * XXX - keeping an accurate refcount during GC seems to be quite | |
47 | * tricky, so we just keep score of whether a stringbuf might be | |
50b1996f | 48 | * shared, not whether it definitely is. |
3ee86942 MV |
49 | * |
50 | * The scheme I (mvo) tried to keep an accurate reference count would | |
51 | * recount all strings that point to a stringbuf during the mark-phase | |
52 | * of the GC. This was done since one cannot access the stringbuf of | |
53 | * a string when that string is freed (in order to decrease the | |
54 | * reference count). The memory of the stringbuf might have been | |
55 | * reused already for something completely different. | |
56 | * | |
57 | * This recounted worked for a small number of threads beating on | |
58 | * cow-strings, but it failed randomly with more than 10 threads, say. | |
59 | * I couldn't figure out what went wrong, so I used the conservative | |
60 | * approach implemented below. | |
61 | * | |
62 | * A stringbuf needs to know its length, but only so that it can be | |
63 | * reported when the stringbuf is freed. | |
64 | * | |
50b1996f MG |
65 | * There are 3 storage strategies for stringbufs: inline, outline, and |
66 | * wide. | |
67 | * | |
68 | * Inline strings are small 8-bit strings stored within the double | |
69 | * cell itself. Outline strings are larger 8-bit strings with GC | |
70 | * allocated storage. Wide strings are 32-bit strings with allocated | |
71 | * storage. | |
72 | * | |
73 | * There was little value in making wide string inlineable, since | |
74 | * there is only room for three inlined 32-bit characters. Thus wide | |
75 | * stringbufs are never inlined. | |
3ee86942 MV |
76 | */ |
77 | ||
78 | #define STRINGBUF_F_SHARED 0x100 | |
79 | #define STRINGBUF_F_INLINE 0x200 | |
50b1996f MG |
80 | #define STRINGBUF_F_WIDE 0x400 /* If true, strings have UCS-4 |
81 | encoding. Otherwise, strings | |
82 | are Latin-1. */ | |
3ee86942 MV |
83 | |
84 | #define STRINGBUF_TAG scm_tc7_stringbuf | |
85 | #define STRINGBUF_SHARED(buf) (SCM_CELL_WORD_0(buf) & STRINGBUF_F_SHARED) | |
86 | #define STRINGBUF_INLINE(buf) (SCM_CELL_WORD_0(buf) & STRINGBUF_F_INLINE) | |
9c44cd45 | 87 | #define STRINGBUF_WIDE(buf) (SCM_CELL_WORD_0(buf) & STRINGBUF_F_WIDE) |
3ee86942 MV |
88 | |
89 | #define STRINGBUF_OUTLINE_CHARS(buf) ((char *)SCM_CELL_WORD_1(buf)) | |
90 | #define STRINGBUF_OUTLINE_LENGTH(buf) (SCM_CELL_WORD_2(buf)) | |
91 | #define STRINGBUF_INLINE_CHARS(buf) ((char *)SCM_CELL_OBJECT_LOC(buf,1)) | |
92 | #define STRINGBUF_INLINE_LENGTH(buf) (((size_t)SCM_CELL_WORD_0(buf))>>16) | |
93 | ||
94 | #define STRINGBUF_CHARS(buf) (STRINGBUF_INLINE (buf) \ | |
95 | ? STRINGBUF_INLINE_CHARS (buf) \ | |
96 | : STRINGBUF_OUTLINE_CHARS (buf)) | |
50b1996f | 97 | |
9c44cd45 | 98 | #define STRINGBUF_WIDE_CHARS(buf) ((scm_t_wchar *)SCM_CELL_WORD_1(buf)) |
3ee86942 MV |
99 | #define STRINGBUF_LENGTH(buf) (STRINGBUF_INLINE (buf) \ |
100 | ? STRINGBUF_INLINE_LENGTH (buf) \ | |
101 | : STRINGBUF_OUTLINE_LENGTH (buf)) | |
102 | ||
103 | #define STRINGBUF_MAX_INLINE_LEN (3*sizeof(scm_t_bits)) | |
104 | ||
105 | #define SET_STRINGBUF_SHARED(buf) \ | |
106 | (SCM_SET_CELL_WORD_0 ((buf), SCM_CELL_WORD_0 (buf) | STRINGBUF_F_SHARED)) | |
107 | ||
108 | #if SCM_DEBUG | |
109 | static size_t lenhist[1001]; | |
110 | #endif | |
111 | ||
50b1996f MG |
112 | /* Make a stringbuf with space for LEN 8-bit Latin-1-encoded |
113 | characters. */ | |
3ee86942 MV |
114 | static SCM |
115 | make_stringbuf (size_t len) | |
0f2d19dd | 116 | { |
3ee86942 MV |
117 | /* XXX - for the benefit of SCM_STRING_CHARS, SCM_SYMBOL_CHARS and |
118 | scm_i_symbol_chars, all stringbufs are null-terminated. Once | |
119 | SCM_STRING_CHARS and SCM_SYMBOL_CHARS are removed and the code | |
120 | has been changed for scm_i_symbol_chars, this null-termination | |
121 | can be dropped. | |
122 | */ | |
123 | ||
124 | #if SCM_DEBUG | |
125 | if (len < 1000) | |
126 | lenhist[len]++; | |
127 | else | |
128 | lenhist[1000]++; | |
129 | #endif | |
0f2d19dd | 130 | |
3ee86942 MV |
131 | if (len <= STRINGBUF_MAX_INLINE_LEN-1) |
132 | { | |
133 | return scm_double_cell (STRINGBUF_TAG | STRINGBUF_F_INLINE | (len << 16), | |
134 | 0, 0, 0); | |
135 | } | |
136 | else | |
137 | { | |
138 | char *mem = scm_gc_malloc (len+1, "string"); | |
139 | mem[len] = '\0'; | |
140 | return scm_double_cell (STRINGBUF_TAG, (scm_t_bits) mem, | |
141 | (scm_t_bits) len, (scm_t_bits) 0); | |
142 | } | |
143 | } | |
e53cc817 | 144 | |
50b1996f MG |
145 | /* Make a stringbuf with space for LEN 32-bit UCS-4-encoded |
146 | characters. */ | |
9c44cd45 MG |
147 | static SCM |
148 | make_wide_stringbuf (size_t len) | |
149 | { | |
150 | scm_t_wchar *mem; | |
151 | #if SCM_DEBUG | |
152 | if (len < 1000) | |
153 | lenhist[len]++; | |
154 | else | |
155 | lenhist[1000]++; | |
156 | #endif | |
157 | ||
158 | mem = scm_gc_malloc (sizeof (scm_t_wchar) * (len + 1), "string"); | |
159 | mem[len] = 0; | |
160 | return scm_double_cell (STRINGBUF_TAG | STRINGBUF_F_WIDE, (scm_t_bits) mem, | |
161 | (scm_t_bits) len, (scm_t_bits) 0); | |
162 | } | |
163 | ||
2b829bbb KR |
164 | /* Return a new stringbuf whose underlying storage consists of the LEN+1 |
165 | octets pointed to by STR (the last octet is zero). */ | |
7f74cf9a | 166 | SCM |
fd0a5bbc HWN |
167 | scm_i_take_stringbufn (char *str, size_t len) |
168 | { | |
2b829bbb | 169 | scm_gc_register_collectable_memory (str, len + 1, "stringbuf"); |
fd0a5bbc HWN |
170 | |
171 | return scm_double_cell (STRINGBUF_TAG, (scm_t_bits) str, | |
172 | (scm_t_bits) len, (scm_t_bits) 0); | |
173 | } | |
174 | ||
3ee86942 MV |
175 | SCM |
176 | scm_i_stringbuf_mark (SCM buf) | |
177 | { | |
178 | return SCM_BOOL_F; | |
179 | } | |
1bbd0b84 | 180 | |
3ee86942 MV |
181 | void |
182 | scm_i_stringbuf_free (SCM buf) | |
0f2d19dd | 183 | { |
3ee86942 | 184 | if (!STRINGBUF_INLINE (buf)) |
9c44cd45 MG |
185 | { |
186 | if (!STRINGBUF_WIDE (buf)) | |
187 | scm_gc_free (STRINGBUF_OUTLINE_CHARS (buf), | |
188 | STRINGBUF_OUTLINE_LENGTH (buf) + 1, "string"); | |
189 | else | |
190 | scm_gc_free (STRINGBUF_OUTLINE_CHARS (buf), | |
191 | sizeof (scm_t_wchar) * (STRINGBUF_OUTLINE_LENGTH (buf) | |
192 | + 1), "string"); | |
193 | } | |
194 | ||
195 | } | |
196 | ||
50b1996f MG |
197 | /* Convert a stringbuf containing 8-bit Latin-1-encoded characters to |
198 | one containing 32-bit UCS-4-encoded characters. */ | |
9c44cd45 MG |
199 | static void |
200 | widen_stringbuf (SCM buf) | |
201 | { | |
202 | size_t i, len; | |
203 | scm_t_wchar *mem; | |
204 | ||
205 | if (STRINGBUF_WIDE (buf)) | |
206 | return; | |
207 | ||
208 | if (STRINGBUF_INLINE (buf)) | |
209 | { | |
210 | len = STRINGBUF_INLINE_LENGTH (buf); | |
211 | ||
212 | mem = scm_gc_malloc (sizeof (scm_t_wchar) * (len + 1), "string"); | |
213 | for (i = 0; i < len; i++) | |
214 | mem[i] = | |
215 | (scm_t_wchar) (unsigned char) STRINGBUF_INLINE_CHARS (buf)[i]; | |
216 | mem[len] = 0; | |
217 | ||
218 | SCM_SET_CELL_WORD_0 (buf, SCM_CELL_WORD_0 (buf) ^ STRINGBUF_F_INLINE); | |
219 | SCM_SET_CELL_WORD_0 (buf, SCM_CELL_WORD_0 (buf) | STRINGBUF_F_WIDE); | |
220 | SCM_SET_CELL_WORD_1 (buf, mem); | |
221 | SCM_SET_CELL_WORD_2 (buf, len); | |
222 | } | |
223 | else | |
224 | { | |
225 | len = STRINGBUF_OUTLINE_LENGTH (buf); | |
226 | ||
227 | mem = scm_gc_malloc (sizeof (scm_t_wchar) * (len + 1), "string"); | |
228 | for (i = 0; i < len; i++) | |
229 | mem[i] = | |
230 | (scm_t_wchar) (unsigned char) STRINGBUF_OUTLINE_CHARS (buf)[i]; | |
231 | mem[len] = 0; | |
232 | ||
233 | scm_gc_free (STRINGBUF_OUTLINE_CHARS (buf), len + 1, "string"); | |
234 | ||
235 | SCM_SET_CELL_WORD_0 (buf, SCM_CELL_WORD_0 (buf) | STRINGBUF_F_WIDE); | |
236 | SCM_SET_CELL_WORD_1 (buf, mem); | |
237 | SCM_SET_CELL_WORD_2 (buf, len); | |
238 | } | |
3ee86942 | 239 | } |
bd9e24b3 | 240 | |
9de87eea | 241 | scm_i_pthread_mutex_t stringbuf_write_mutex = SCM_I_PTHREAD_MUTEX_INITIALIZER; |
bd9e24b3 | 242 | |
3ee86942 MV |
243 | /* Copy-on-write strings. |
244 | */ | |
bd9e24b3 | 245 | |
3ee86942 | 246 | #define STRING_TAG scm_tc7_string |
bd9e24b3 | 247 | |
3ee86942 MV |
248 | #define STRING_STRINGBUF(str) (SCM_CELL_OBJECT_1(str)) |
249 | #define STRING_START(str) ((size_t)SCM_CELL_WORD_2(str)) | |
250 | #define STRING_LENGTH(str) ((size_t)SCM_CELL_WORD_3(str)) | |
bd9e24b3 | 251 | |
3ee86942 MV |
252 | #define SET_STRING_STRINGBUF(str,buf) (SCM_SET_CELL_OBJECT_1(str,buf)) |
253 | #define SET_STRING_START(str,start) (SCM_SET_CELL_WORD_2(str,start)) | |
254 | ||
255 | #define IS_STRING(str) (SCM_NIMP(str) && SCM_TYP7(str) == STRING_TAG) | |
256 | ||
ed35de72 MV |
257 | /* Read-only strings. |
258 | */ | |
259 | ||
260 | #define RO_STRING_TAG (scm_tc7_string + 0x200) | |
261 | #define IS_RO_STRING(str) (SCM_CELL_TYPE(str)==RO_STRING_TAG) | |
262 | ||
e1b29f6a MV |
263 | /* Mutation-sharing substrings |
264 | */ | |
265 | ||
266 | #define SH_STRING_TAG (scm_tc7_string + 0x100) | |
267 | ||
268 | #define SH_STRING_STRING(sh) (SCM_CELL_OBJECT_1(sh)) | |
269 | /* START and LENGTH as for STRINGs. */ | |
270 | ||
271 | #define IS_SH_STRING(str) (SCM_CELL_TYPE(str)==SH_STRING_TAG) | |
272 | ||
50b1996f MG |
273 | /* Create a scheme string with space for LEN 8-bit Latin-1-encoded |
274 | characters. CHARSP, if not NULL, will be set to location of the | |
275 | char array. */ | |
3ee86942 MV |
276 | SCM |
277 | scm_i_make_string (size_t len, char **charsp) | |
278 | { | |
279 | SCM buf = make_stringbuf (len); | |
280 | SCM res; | |
281 | if (charsp) | |
282 | *charsp = STRINGBUF_CHARS (buf); | |
283 | res = scm_double_cell (STRING_TAG, SCM_UNPACK(buf), | |
284 | (scm_t_bits)0, (scm_t_bits) len); | |
285 | return res; | |
0f2d19dd JB |
286 | } |
287 | ||
50b1996f MG |
288 | /* Create a scheme string with space for LEN 32-bit UCS-4-encoded |
289 | characters. CHARSP, if not NULL, will be set to location of the | |
290 | character array. */ | |
9c44cd45 | 291 | SCM |
50b1996f | 292 | scm_i_make_wide_string (size_t len, scm_t_wchar **charsp) |
9c44cd45 MG |
293 | { |
294 | SCM buf = make_wide_stringbuf (len); | |
295 | SCM res; | |
296 | if (charsp) | |
297 | *charsp = STRINGBUF_WIDE_CHARS (buf); | |
298 | res = scm_double_cell (STRING_TAG, SCM_UNPACK (buf), | |
299 | (scm_t_bits) 0, (scm_t_bits) len); | |
300 | return res; | |
301 | } | |
302 | ||
3ee86942 MV |
303 | static void |
304 | validate_substring_args (SCM str, size_t start, size_t end) | |
305 | { | |
306 | if (!IS_STRING (str)) | |
307 | scm_wrong_type_arg_msg (NULL, 0, str, "string"); | |
308 | if (start > STRING_LENGTH (str)) | |
309 | scm_out_of_range (NULL, scm_from_size_t (start)); | |
310 | if (end > STRING_LENGTH (str) || end < start) | |
311 | scm_out_of_range (NULL, scm_from_size_t (end)); | |
312 | } | |
0f2d19dd | 313 | |
e1b29f6a MV |
314 | static inline void |
315 | get_str_buf_start (SCM *str, SCM *buf, size_t *start) | |
316 | { | |
317 | *start = STRING_START (*str); | |
318 | if (IS_SH_STRING (*str)) | |
319 | { | |
320 | *str = SH_STRING_STRING (*str); | |
321 | *start += STRING_START (*str); | |
322 | } | |
323 | *buf = STRING_STRINGBUF (*str); | |
324 | } | |
325 | ||
3ee86942 MV |
326 | SCM |
327 | scm_i_substring (SCM str, size_t start, size_t end) | |
0f2d19dd | 328 | { |
e1b29f6a MV |
329 | SCM buf; |
330 | size_t str_start; | |
331 | get_str_buf_start (&str, &buf, &str_start); | |
9de87eea | 332 | scm_i_pthread_mutex_lock (&stringbuf_write_mutex); |
3ee86942 | 333 | SET_STRINGBUF_SHARED (buf); |
9de87eea | 334 | scm_i_pthread_mutex_unlock (&stringbuf_write_mutex); |
3ee86942 | 335 | return scm_double_cell (STRING_TAG, SCM_UNPACK(buf), |
e1b29f6a MV |
336 | (scm_t_bits)str_start + start, |
337 | (scm_t_bits) end - start); | |
0f2d19dd JB |
338 | } |
339 | ||
ed35de72 MV |
340 | SCM |
341 | scm_i_substring_read_only (SCM str, size_t start, size_t end) | |
342 | { | |
45a9f430 LC |
343 | SCM buf; |
344 | size_t str_start; | |
345 | get_str_buf_start (&str, &buf, &str_start); | |
346 | scm_i_pthread_mutex_lock (&stringbuf_write_mutex); | |
347 | SET_STRINGBUF_SHARED (buf); | |
348 | scm_i_pthread_mutex_unlock (&stringbuf_write_mutex); | |
349 | return scm_double_cell (RO_STRING_TAG, SCM_UNPACK(buf), | |
350 | (scm_t_bits)str_start + start, | |
351 | (scm_t_bits) end - start); | |
ed35de72 MV |
352 | } |
353 | ||
3ee86942 MV |
354 | SCM |
355 | scm_i_substring_copy (SCM str, size_t start, size_t end) | |
356 | { | |
357 | size_t len = end - start; | |
edea856c | 358 | SCM buf, my_buf; |
e1b29f6a MV |
359 | size_t str_start; |
360 | get_str_buf_start (&str, &buf, &str_start); | |
9c44cd45 MG |
361 | if (scm_i_is_narrow_string (str)) |
362 | { | |
363 | my_buf = make_stringbuf (len); | |
364 | memcpy (STRINGBUF_CHARS (my_buf), | |
365 | STRINGBUF_CHARS (buf) + str_start + start, len); | |
366 | } | |
367 | else | |
368 | { | |
369 | my_buf = make_wide_stringbuf (len); | |
370 | u32_cpy ((scm_t_uint32 *) STRINGBUF_WIDE_CHARS (my_buf), | |
371 | (scm_t_uint32 *) (STRINGBUF_WIDE_CHARS (buf) + str_start | |
372 | + start), len); | |
373 | /* Even though this string is wide, the substring may be narrow. | |
50b1996f | 374 | Consider adding code to narrow the string. */ |
9c44cd45 | 375 | } |
3ee86942 | 376 | scm_remember_upto_here_1 (buf); |
9c44cd45 MG |
377 | return scm_double_cell (STRING_TAG, SCM_UNPACK (my_buf), |
378 | (scm_t_bits) 0, (scm_t_bits) len); | |
3ee86942 | 379 | } |
0f2d19dd | 380 | |
e1b29f6a MV |
381 | SCM |
382 | scm_i_substring_shared (SCM str, size_t start, size_t end) | |
383 | { | |
384 | if (start == 0 && end == STRING_LENGTH (str)) | |
385 | return str; | |
386 | else | |
387 | { | |
388 | size_t len = end - start; | |
389 | if (IS_SH_STRING (str)) | |
390 | { | |
391 | start += STRING_START (str); | |
392 | str = SH_STRING_STRING (str); | |
393 | } | |
394 | return scm_double_cell (SH_STRING_TAG, SCM_UNPACK(str), | |
395 | (scm_t_bits)start, (scm_t_bits) len); | |
396 | } | |
397 | } | |
398 | ||
3ee86942 MV |
399 | SCM |
400 | scm_c_substring (SCM str, size_t start, size_t end) | |
401 | { | |
402 | validate_substring_args (str, start, end); | |
403 | return scm_i_substring (str, start, end); | |
404 | } | |
ee149d03 | 405 | |
ed35de72 MV |
406 | SCM |
407 | scm_c_substring_read_only (SCM str, size_t start, size_t end) | |
408 | { | |
409 | validate_substring_args (str, start, end); | |
410 | return scm_i_substring_read_only (str, start, end); | |
411 | } | |
412 | ||
0f2d19dd | 413 | SCM |
3ee86942 | 414 | scm_c_substring_copy (SCM str, size_t start, size_t end) |
0f2d19dd | 415 | { |
3ee86942 MV |
416 | validate_substring_args (str, start, end); |
417 | return scm_i_substring_copy (str, start, end); | |
418 | } | |
419 | ||
3ee86942 MV |
420 | SCM |
421 | scm_c_substring_shared (SCM str, size_t start, size_t end) | |
422 | { | |
423 | validate_substring_args (str, start, end); | |
424 | return scm_i_substring_shared (str, start, end); | |
425 | } | |
0f2d19dd | 426 | |
ee149d03 | 427 | SCM |
3ee86942 | 428 | scm_i_string_mark (SCM str) |
ee149d03 | 429 | { |
3ee86942 MV |
430 | if (IS_SH_STRING (str)) |
431 | return SH_STRING_STRING (str); | |
432 | else | |
433 | return STRING_STRINGBUF (str); | |
ee149d03 JB |
434 | } |
435 | ||
3ee86942 MV |
436 | void |
437 | scm_i_string_free (SCM str) | |
438 | { | |
439 | } | |
36284627 | 440 | |
3ee86942 MV |
441 | /* Internal accessors |
442 | */ | |
443 | ||
50b1996f MG |
444 | /* Returns the number of characters in STR. This may be different |
445 | than the memory size of the string storage. */ | |
3ee86942 MV |
446 | size_t |
447 | scm_i_string_length (SCM str) | |
0f2d19dd | 448 | { |
3ee86942 | 449 | return STRING_LENGTH (str); |
0f2d19dd JB |
450 | } |
451 | ||
50b1996f MG |
452 | /* True if the string is 'narrow', meaning it has a 8-bit Latin-1 |
453 | encoding. False if it is 'wide', having a 32-bit UCS-4 | |
454 | encoding. */ | |
9c44cd45 MG |
455 | int |
456 | scm_i_is_narrow_string (SCM str) | |
457 | { | |
458 | return !STRINGBUF_WIDE (STRING_STRINGBUF (str)); | |
459 | } | |
460 | ||
50b1996f MG |
461 | /* Returns a pointer to the 8-bit Latin-1 encoded character array of |
462 | STR. */ | |
3ee86942 MV |
463 | const char * |
464 | scm_i_string_chars (SCM str) | |
465 | { | |
466 | SCM buf; | |
e1b29f6a MV |
467 | size_t start; |
468 | get_str_buf_start (&str, &buf, &start); | |
9c44cd45 MG |
469 | if (scm_i_is_narrow_string (str)) |
470 | return STRINGBUF_CHARS (buf) + start; | |
471 | else | |
472 | scm_misc_error (NULL, "Invalid read access of chars of wide string: ~s", | |
473 | scm_list_1 (str)); | |
474 | return NULL; | |
3ee86942 | 475 | } |
b00418df | 476 | |
50b1996f MG |
477 | /* Returns a pointer to the 32-bit UCS-4 encoded character array of |
478 | STR. */ | |
9c44cd45 MG |
479 | const scm_t_wchar * |
480 | scm_i_string_wide_chars (SCM str) | |
481 | { | |
482 | SCM buf; | |
483 | size_t start; | |
484 | ||
485 | get_str_buf_start (&str, &buf, &start); | |
486 | if (!scm_i_is_narrow_string (str)) | |
487 | return STRINGBUF_WIDE_CHARS (buf) + start; | |
488 | else | |
489 | scm_misc_error (NULL, "Invalid read access of chars of narrow string: ~s", | |
490 | scm_list_1 (str)); | |
491 | } | |
492 | ||
493 | /* If the buffer in ORIG_STR is shared, copy ORIG_STR's characters to | |
494 | a new string buffer, so that it can be modified without modifying | |
50b1996f MG |
495 | other strings. Also, lock the string mutex. Later, one must call |
496 | scm_i_string_stop_writing to unlock the mutex. */ | |
9c44cd45 MG |
497 | SCM |
498 | scm_i_string_start_writing (SCM orig_str) | |
b00418df | 499 | { |
ed35de72 | 500 | SCM buf, str = orig_str; |
e1b29f6a | 501 | size_t start; |
ed35de72 | 502 | |
e1b29f6a | 503 | get_str_buf_start (&str, &buf, &start); |
ed35de72 MV |
504 | if (IS_RO_STRING (str)) |
505 | scm_misc_error (NULL, "string is read-only: ~s", scm_list_1 (orig_str)); | |
506 | ||
9de87eea | 507 | scm_i_pthread_mutex_lock (&stringbuf_write_mutex); |
3ee86942 MV |
508 | if (STRINGBUF_SHARED (buf)) |
509 | { | |
9c44cd45 | 510 | /* Clone the stringbuf. */ |
3ee86942 MV |
511 | size_t len = STRING_LENGTH (str); |
512 | SCM new_buf; | |
513 | ||
9de87eea | 514 | scm_i_pthread_mutex_unlock (&stringbuf_write_mutex); |
3ee86942 | 515 | |
9c44cd45 MG |
516 | if (scm_i_is_narrow_string (str)) |
517 | { | |
518 | new_buf = make_stringbuf (len); | |
519 | memcpy (STRINGBUF_CHARS (new_buf), | |
520 | STRINGBUF_CHARS (buf) + STRING_START (str), len); | |
521 | ||
522 | } | |
523 | else | |
524 | { | |
525 | new_buf = make_wide_stringbuf (len); | |
526 | u32_cpy ((scm_t_uint32 *) STRINGBUF_WIDE_CHARS (new_buf), | |
527 | (scm_t_uint32 *) (STRINGBUF_WIDE_CHARS (buf) | |
528 | + STRING_START (str)), len); | |
529 | } | |
3ee86942 MV |
530 | scm_i_thread_put_to_sleep (); |
531 | SET_STRING_STRINGBUF (str, new_buf); | |
532 | start -= STRING_START (str); | |
533 | SET_STRING_START (str, 0); | |
534 | scm_i_thread_wake_up (); | |
535 | ||
536 | buf = new_buf; | |
537 | ||
9de87eea | 538 | scm_i_pthread_mutex_lock (&stringbuf_write_mutex); |
3ee86942 | 539 | } |
9c44cd45 MG |
540 | return orig_str; |
541 | } | |
542 | ||
50b1996f | 543 | /* Return a pointer to the 8-bit Latin-1 chars of a string. */ |
9c44cd45 MG |
544 | char * |
545 | scm_i_string_writable_chars (SCM str) | |
546 | { | |
547 | SCM buf; | |
548 | size_t start; | |
3ee86942 | 549 | |
9c44cd45 MG |
550 | get_str_buf_start (&str, &buf, &start); |
551 | if (scm_i_is_narrow_string (str)) | |
552 | return STRINGBUF_CHARS (buf) + start; | |
553 | else | |
554 | scm_misc_error (NULL, "Invalid write access of chars of wide string: ~s", | |
555 | scm_list_1 (str)); | |
556 | return NULL; | |
557 | } | |
558 | ||
50b1996f | 559 | /* Return a pointer to the UCS-4 codepoints of a string. */ |
9c44cd45 MG |
560 | static scm_t_wchar * |
561 | scm_i_string_writable_wide_chars (SCM str) | |
562 | { | |
563 | SCM buf; | |
564 | size_t start; | |
565 | ||
566 | get_str_buf_start (&str, &buf, &start); | |
567 | if (!scm_i_is_narrow_string (str)) | |
568 | return STRINGBUF_WIDE_CHARS (buf) + start; | |
569 | else | |
570 | scm_misc_error (NULL, "Invalid read access of chars of narrow string: ~s", | |
571 | scm_list_1 (str)); | |
b00418df DH |
572 | } |
573 | ||
50b1996f MG |
574 | /* Unlock the string mutex that was locked when |
575 | scm_i_string_start_writing was called. */ | |
3ee86942 MV |
576 | void |
577 | scm_i_string_stop_writing (void) | |
578 | { | |
9de87eea | 579 | scm_i_pthread_mutex_unlock (&stringbuf_write_mutex); |
3ee86942 | 580 | } |
b00418df | 581 | |
50b1996f | 582 | /* Return the Xth character of STR as a UCS-4 codepoint. */ |
9c44cd45 MG |
583 | scm_t_wchar |
584 | scm_i_string_ref (SCM str, size_t x) | |
585 | { | |
586 | if (scm_i_is_narrow_string (str)) | |
587 | return (scm_t_wchar) (unsigned char) (scm_i_string_chars (str)[x]); | |
588 | else | |
589 | return scm_i_string_wide_chars (str)[x]; | |
590 | } | |
591 | ||
50b1996f | 592 | /* Set the Pth character of STR to UCS-4 codepoint CHR. */ |
9c44cd45 MG |
593 | void |
594 | scm_i_string_set_x (SCM str, size_t p, scm_t_wchar chr) | |
595 | { | |
596 | if (chr > 0xFF && scm_i_is_narrow_string (str)) | |
597 | widen_stringbuf (STRING_STRINGBUF (str)); | |
598 | ||
599 | if (scm_i_is_narrow_string (str)) | |
600 | { | |
601 | char *dst = scm_i_string_writable_chars (str); | |
602 | dst[p] = (char) (unsigned char) chr; | |
603 | } | |
604 | else | |
605 | { | |
606 | scm_t_wchar *dst = scm_i_string_writable_wide_chars (str); | |
607 | dst[p] = chr; | |
608 | } | |
609 | } | |
610 | ||
3ee86942 MV |
611 | /* Symbols. |
612 | ||
613 | Basic symbol creation and accessing is done here, the rest is in | |
614 | symbols.[hc]. This has been done to keep stringbufs and the | |
615 | internals of strings and string-like objects confined to this file. | |
616 | */ | |
617 | ||
618 | #define SYMBOL_STRINGBUF SCM_CELL_OBJECT_1 | |
619 | ||
620 | SCM | |
6869328b MV |
621 | scm_i_make_symbol (SCM name, scm_t_bits flags, |
622 | unsigned long hash, SCM props) | |
3ee86942 MV |
623 | { |
624 | SCM buf; | |
625 | size_t start = STRING_START (name); | |
626 | size_t length = STRING_LENGTH (name); | |
627 | ||
628 | if (IS_SH_STRING (name)) | |
629 | { | |
630 | name = SH_STRING_STRING (name); | |
631 | start += STRING_START (name); | |
632 | } | |
633 | buf = SYMBOL_STRINGBUF (name); | |
634 | ||
635 | if (start == 0 && length == STRINGBUF_LENGTH (buf)) | |
636 | { | |
637 | /* reuse buf. */ | |
9de87eea | 638 | scm_i_pthread_mutex_lock (&stringbuf_write_mutex); |
3ee86942 | 639 | SET_STRINGBUF_SHARED (buf); |
9de87eea | 640 | scm_i_pthread_mutex_unlock (&stringbuf_write_mutex); |
3ee86942 MV |
641 | } |
642 | else | |
643 | { | |
644 | /* make new buf. */ | |
9c44cd45 MG |
645 | if (scm_i_is_narrow_string (name)) |
646 | { | |
647 | SCM new_buf = make_stringbuf (length); | |
648 | memcpy (STRINGBUF_CHARS (new_buf), | |
649 | STRINGBUF_CHARS (buf) + start, length); | |
650 | buf = new_buf; | |
651 | } | |
652 | else | |
653 | { | |
654 | SCM new_buf = make_wide_stringbuf (length); | |
655 | u32_cpy ((scm_t_uint32 *) STRINGBUF_WIDE_CHARS (new_buf), | |
656 | (scm_t_uint32 *) STRINGBUF_WIDE_CHARS (buf) + start, | |
657 | length); | |
658 | buf = new_buf; | |
659 | } | |
3ee86942 | 660 | } |
6869328b | 661 | return scm_double_cell (scm_tc7_symbol | flags, SCM_UNPACK (buf), |
3ee86942 MV |
662 | (scm_t_bits) hash, SCM_UNPACK (props)); |
663 | } | |
664 | ||
fd0a5bbc HWN |
665 | SCM |
666 | scm_i_c_make_symbol (const char *name, size_t len, | |
667 | scm_t_bits flags, unsigned long hash, SCM props) | |
668 | { | |
669 | SCM buf = make_stringbuf (len); | |
670 | memcpy (STRINGBUF_CHARS (buf), name, len); | |
671 | ||
672 | return scm_double_cell (scm_tc7_symbol | flags, SCM_UNPACK (buf), | |
673 | (scm_t_bits) hash, SCM_UNPACK (props)); | |
674 | } | |
675 | ||
676 | /* Return a new symbol that uses the LEN bytes pointed to by NAME as its | |
677 | underlying storage. */ | |
678 | SCM | |
679 | scm_i_c_take_symbol (char *name, size_t len, | |
680 | scm_t_bits flags, unsigned long hash, SCM props) | |
681 | { | |
682 | SCM buf = scm_i_take_stringbufn (name, len); | |
683 | ||
684 | return scm_double_cell (scm_tc7_symbol | flags, SCM_UNPACK (buf), | |
685 | (scm_t_bits) hash, SCM_UNPACK (props)); | |
686 | } | |
687 | ||
50b1996f MG |
688 | /* Returns the number of characters in SYM. This may be different |
689 | from the memory size of SYM. */ | |
3ee86942 MV |
690 | size_t |
691 | scm_i_symbol_length (SCM sym) | |
0f2d19dd | 692 | { |
3ee86942 | 693 | return STRINGBUF_LENGTH (SYMBOL_STRINGBUF (sym)); |
0f2d19dd JB |
694 | } |
695 | ||
071bb6a8 LC |
696 | size_t |
697 | scm_c_symbol_length (SCM sym) | |
698 | #define FUNC_NAME "scm_c_symbol_length" | |
699 | { | |
700 | SCM_VALIDATE_SYMBOL (1, sym); | |
701 | ||
702 | return STRINGBUF_LENGTH (SYMBOL_STRINGBUF (sym)); | |
703 | } | |
704 | #undef FUNC_NAME | |
705 | ||
50b1996f MG |
706 | /* True if the name of SYM is stored as a Latin-1 encoded string. |
707 | False if it is stored as a 32-bit UCS-4-encoded string. */ | |
9c44cd45 MG |
708 | int |
709 | scm_i_is_narrow_symbol (SCM sym) | |
710 | { | |
711 | SCM buf; | |
712 | ||
713 | buf = SYMBOL_STRINGBUF (sym); | |
714 | return !STRINGBUF_WIDE (buf); | |
715 | } | |
716 | ||
50b1996f MG |
717 | /* Returns a pointer to the 8-bit Latin-1 encoded character array that |
718 | contains the name of SYM. */ | |
3ee86942 MV |
719 | const char * |
720 | scm_i_symbol_chars (SCM sym) | |
721 | { | |
9c44cd45 MG |
722 | SCM buf; |
723 | ||
724 | buf = SYMBOL_STRINGBUF (sym); | |
725 | if (!STRINGBUF_WIDE (buf)) | |
726 | return STRINGBUF_CHARS (buf); | |
727 | else | |
728 | scm_misc_error (NULL, "Invalid access of chars of a wide symbol ~S", | |
729 | scm_list_1 (sym)); | |
730 | } | |
731 | ||
50b1996f MG |
732 | /* Return a pointer to the 32-bit UCS-4-encoded character array of a |
733 | symbol's name. */ | |
9c44cd45 MG |
734 | const scm_t_wchar * |
735 | scm_i_symbol_wide_chars (SCM sym) | |
736 | { | |
737 | SCM buf; | |
738 | ||
739 | buf = SYMBOL_STRINGBUF (sym); | |
740 | if (STRINGBUF_WIDE (buf)) | |
741 | return STRINGBUF_WIDE_CHARS (buf); | |
742 | else | |
743 | scm_misc_error (NULL, "Invalid access of chars of a narrow symbol ~S", | |
744 | scm_list_1 (sym)); | |
3ee86942 | 745 | } |
1cc91f1b | 746 | |
3ee86942 MV |
747 | SCM |
748 | scm_i_symbol_mark (SCM sym) | |
0f2d19dd | 749 | { |
3ee86942 MV |
750 | scm_gc_mark (SYMBOL_STRINGBUF (sym)); |
751 | return SCM_CELL_OBJECT_3 (sym); | |
0f2d19dd JB |
752 | } |
753 | ||
3ee86942 MV |
754 | void |
755 | scm_i_symbol_free (SCM sym) | |
756 | { | |
757 | } | |
0f2d19dd | 758 | |
be54b15d | 759 | SCM |
3ee86942 | 760 | scm_i_symbol_substring (SCM sym, size_t start, size_t end) |
be54b15d | 761 | { |
3ee86942 | 762 | SCM buf = SYMBOL_STRINGBUF (sym); |
9de87eea | 763 | scm_i_pthread_mutex_lock (&stringbuf_write_mutex); |
3ee86942 | 764 | SET_STRINGBUF_SHARED (buf); |
9de87eea | 765 | scm_i_pthread_mutex_unlock (&stringbuf_write_mutex); |
fd2b17b9 | 766 | return scm_double_cell (RO_STRING_TAG, SCM_UNPACK (buf), |
3ee86942 MV |
767 | (scm_t_bits)start, (scm_t_bits) end - start); |
768 | } | |
be54b15d | 769 | |
50b1996f | 770 | /* Returns the Xth character of symbol SYM as a UCS-4 codepoint. */ |
9c44cd45 MG |
771 | scm_t_wchar |
772 | scm_i_symbol_ref (SCM sym, size_t x) | |
773 | { | |
774 | if (scm_i_is_narrow_symbol (sym)) | |
775 | return (scm_t_wchar) (unsigned char) (scm_i_symbol_chars (sym)[x]); | |
776 | else | |
777 | return scm_i_symbol_wide_chars (sym)[x]; | |
778 | } | |
779 | ||
3ee86942 MV |
780 | /* Debugging |
781 | */ | |
be54b15d | 782 | |
3ee86942 | 783 | #if SCM_DEBUG |
be54b15d | 784 | |
3ee86942 MV |
785 | SCM scm_sys_string_dump (SCM); |
786 | SCM scm_sys_symbol_dump (SCM); | |
787 | SCM scm_sys_stringbuf_hist (void); | |
be54b15d | 788 | |
9c44cd45 | 789 | SCM_DEFINE (scm_sys_string_dump, "%string-dump", 1, 0, 0, (SCM str), "") |
3ee86942 MV |
790 | #define FUNC_NAME s_scm_sys_string_dump |
791 | { | |
792 | SCM_VALIDATE_STRING (1, str); | |
793 | fprintf (stderr, "%p:\n", str); | |
794 | fprintf (stderr, " start: %u\n", STRING_START (str)); | |
795 | fprintf (stderr, " len: %u\n", STRING_LENGTH (str)); | |
9c44cd45 MG |
796 | if (scm_i_is_narrow_string (str)) |
797 | fprintf (stderr, " format: narrow\n"); | |
798 | else | |
799 | fprintf (stderr, " format: wide\n"); | |
3ee86942 MV |
800 | if (IS_SH_STRING (str)) |
801 | { | |
802 | fprintf (stderr, " string: %p\n", SH_STRING_STRING (str)); | |
803 | fprintf (stderr, "\n"); | |
804 | scm_sys_string_dump (SH_STRING_STRING (str)); | |
805 | } | |
806 | else | |
807 | { | |
808 | SCM buf = STRING_STRINGBUF (str); | |
809 | fprintf (stderr, " buf: %p\n", buf); | |
9c44cd45 MG |
810 | if (scm_i_is_narrow_string (str)) |
811 | fprintf (stderr, " chars: %p\n", STRINGBUF_CHARS (buf)); | |
812 | else | |
813 | fprintf (stderr, " chars: %p\n", STRINGBUF_WIDE_CHARS (buf)); | |
3ee86942 | 814 | fprintf (stderr, " length: %u\n", STRINGBUF_LENGTH (buf)); |
9c44cd45 MG |
815 | if (STRINGBUF_SHARED (buf)) |
816 | fprintf (stderr, " shared: true\n"); | |
817 | else | |
818 | fprintf (stderr, " shared: false\n"); | |
819 | if (STRINGBUF_INLINE (buf)) | |
820 | fprintf (stderr, " inline: true\n"); | |
821 | else | |
822 | fprintf (stderr, " inline: false\n"); | |
823 | ||
3ee86942 MV |
824 | } |
825 | return SCM_UNSPECIFIED; | |
826 | } | |
827 | #undef FUNC_NAME | |
828 | ||
9c44cd45 | 829 | SCM_DEFINE (scm_sys_symbol_dump, "%symbol-dump", 1, 0, 0, (SCM sym), "") |
3ee86942 MV |
830 | #define FUNC_NAME s_scm_sys_symbol_dump |
831 | { | |
832 | SCM_VALIDATE_SYMBOL (1, sym); | |
833 | fprintf (stderr, "%p:\n", sym); | |
834 | fprintf (stderr, " hash: %lu\n", scm_i_symbol_hash (sym)); | |
9c44cd45 MG |
835 | if (scm_i_is_narrow_symbol (sym)) |
836 | fprintf (stderr, " format: narrow\n"); | |
837 | else | |
838 | fprintf (stderr, " format: wide\n"); | |
3ee86942 MV |
839 | { |
840 | SCM buf = SYMBOL_STRINGBUF (sym); | |
841 | fprintf (stderr, " buf: %p\n", buf); | |
9c44cd45 MG |
842 | if (scm_i_is_narrow_symbol (sym)) |
843 | fprintf (stderr, " chars: %p\n", STRINGBUF_CHARS (buf)); | |
844 | else | |
845 | fprintf (stderr, " chars: %p\n", STRINGBUF_WIDE_CHARS (buf)); | |
3ee86942 | 846 | fprintf (stderr, " length: %u\n", STRINGBUF_LENGTH (buf)); |
9c44cd45 MG |
847 | if (STRINGBUF_SHARED (buf)) |
848 | fprintf (stderr, " shared: true\n"); | |
849 | else | |
850 | fprintf (stderr, " shared: false\n"); | |
851 | ||
3ee86942 MV |
852 | } |
853 | return SCM_UNSPECIFIED; | |
854 | } | |
855 | #undef FUNC_NAME | |
856 | ||
9c44cd45 | 857 | SCM_DEFINE (scm_sys_stringbuf_hist, "%stringbuf-hist", 0, 0, 0, (void), "") |
e1b29f6a | 858 | #define FUNC_NAME s_scm_sys_stringbuf_hist |
3ee86942 MV |
859 | { |
860 | int i; | |
861 | for (i = 0; i < 1000; i++) | |
862 | if (lenhist[i]) | |
863 | fprintf (stderr, " %3d: %u\n", i, lenhist[i]); | |
864 | fprintf (stderr, ">999: %u\n", lenhist[1000]); | |
865 | return SCM_UNSPECIFIED; | |
be54b15d DH |
866 | } |
867 | #undef FUNC_NAME | |
868 | ||
3ee86942 MV |
869 | #endif |
870 | ||
871 | \f | |
872 | ||
873 | SCM_DEFINE (scm_string_p, "string?", 1, 0, 0, | |
874 | (SCM obj), | |
875 | "Return @code{#t} if @var{obj} is a string, else @code{#f}.") | |
876 | #define FUNC_NAME s_scm_string_p | |
877 | { | |
878 | return scm_from_bool (IS_STRING (obj)); | |
879 | } | |
880 | #undef FUNC_NAME | |
881 | ||
882 | ||
883 | SCM_REGISTER_PROC (s_scm_list_to_string, "list->string", 1, 0, 0, scm_string); | |
884 | ||
885 | SCM_DEFINE (scm_string, "string", 0, 0, 1, | |
886 | (SCM chrs), | |
887 | "@deffnx {Scheme Procedure} list->string chrs\n" | |
888 | "Return a newly allocated string composed of the arguments,\n" | |
889 | "@var{chrs}.") | |
890 | #define FUNC_NAME s_scm_string | |
891 | { | |
892 | SCM result; | |
9c44cd45 | 893 | SCM rest; |
3ee86942 | 894 | size_t len; |
9c44cd45 MG |
895 | size_t p = 0; |
896 | long i; | |
3ee86942 | 897 | |
9c44cd45 MG |
898 | /* Verify that this is a list of chars. */ |
899 | i = scm_ilength (chrs); | |
900 | len = (size_t) i; | |
901 | rest = chrs; | |
3ee86942 | 902 | |
9c44cd45 MG |
903 | SCM_ASSERT (len >= 0, chrs, SCM_ARG1, FUNC_NAME); |
904 | while (len > 0 && scm_is_pair (rest)) | |
3ee86942 | 905 | { |
9c44cd45 | 906 | SCM elt = SCM_CAR (rest); |
3ee86942 | 907 | SCM_VALIDATE_CHAR (SCM_ARGn, elt); |
9c44cd45 MG |
908 | rest = SCM_CDR (rest); |
909 | len--; | |
910 | scm_remember_upto_here_1 (elt); | |
911 | } | |
912 | ||
913 | /* Construct a string containing this list of chars. */ | |
914 | len = (size_t) i; | |
915 | rest = chrs; | |
916 | ||
917 | result = scm_i_make_string (len, NULL); | |
918 | result = scm_i_string_start_writing (result); | |
919 | while (len > 0 && scm_is_pair (rest)) | |
920 | { | |
921 | SCM elt = SCM_CAR (rest); | |
922 | scm_i_string_set_x (result, p, SCM_CHAR (elt)); | |
923 | p++; | |
924 | rest = SCM_CDR (rest); | |
3ee86942 | 925 | len--; |
9c44cd45 | 926 | scm_remember_upto_here_1 (elt); |
3ee86942 | 927 | } |
9c44cd45 MG |
928 | scm_i_string_stop_writing (); |
929 | ||
3ee86942 MV |
930 | if (len > 0) |
931 | scm_misc_error (NULL, "list changed while constructing string", SCM_EOL); | |
9c44cd45 | 932 | if (!scm_is_null (rest)) |
3ee86942 MV |
933 | scm_wrong_type_arg_msg (NULL, 0, chrs, "proper list"); |
934 | ||
935 | return result; | |
936 | } | |
937 | #undef FUNC_NAME | |
be54b15d | 938 | |
3b3b36dd | 939 | SCM_DEFINE (scm_make_string, "make-string", 1, 1, 0, |
6fa73e72 | 940 | (SCM k, SCM chr), |
0d26a824 MG |
941 | "Return a newly allocated string of\n" |
942 | "length @var{k}. If @var{chr} is given, then all elements of\n" | |
943 | "the string are initialized to @var{chr}, otherwise the contents\n" | |
9401323e | 944 | "of the @var{string} are unspecified.") |
1bbd0b84 | 945 | #define FUNC_NAME s_scm_make_string |
0f2d19dd | 946 | { |
3ee86942 MV |
947 | return scm_c_make_string (scm_to_size_t (k), chr); |
948 | } | |
949 | #undef FUNC_NAME | |
950 | ||
951 | SCM | |
952 | scm_c_make_string (size_t len, SCM chr) | |
953 | #define FUNC_NAME NULL | |
954 | { | |
9c44cd45 MG |
955 | size_t p; |
956 | SCM res = scm_i_make_string (len, NULL); | |
cb0d8be2 | 957 | |
e11e83f3 MV |
958 | if (!SCM_UNBNDP (chr)) |
959 | { | |
3ee86942 | 960 | SCM_VALIDATE_CHAR (0, chr); |
9c44cd45 MG |
961 | res = scm_i_string_start_writing (res); |
962 | for (p = 0; p < len; p++) | |
963 | scm_i_string_set_x (res, p, SCM_CHAR (chr)); | |
964 | scm_i_string_stop_writing (); | |
0f2d19dd | 965 | } |
e11e83f3 MV |
966 | |
967 | return res; | |
0f2d19dd | 968 | } |
1bbd0b84 | 969 | #undef FUNC_NAME |
0f2d19dd | 970 | |
3b3b36dd | 971 | SCM_DEFINE (scm_string_length, "string-length", 1, 0, 0, |
0d26a824 MG |
972 | (SCM string), |
973 | "Return the number of characters in @var{string}.") | |
1bbd0b84 | 974 | #define FUNC_NAME s_scm_string_length |
0f2d19dd | 975 | { |
d1ca2c64 | 976 | SCM_VALIDATE_STRING (1, string); |
3ee86942 | 977 | return scm_from_size_t (STRING_LENGTH (string)); |
0f2d19dd | 978 | } |
1bbd0b84 | 979 | #undef FUNC_NAME |
0f2d19dd | 980 | |
9c44cd45 MG |
981 | SCM_DEFINE (scm_string_width, "string-width", 1, 0, 0, |
982 | (SCM string), | |
983 | "Return the bytes used to represent a character in @var{string}." | |
984 | "This will return 1 or 4.") | |
985 | #define FUNC_NAME s_scm_string_width | |
986 | { | |
987 | SCM_VALIDATE_STRING (1, string); | |
988 | if (!scm_i_is_narrow_string (string)) | |
989 | return scm_from_int (4); | |
990 | ||
991 | return scm_from_int (1); | |
992 | } | |
993 | #undef FUNC_NAME | |
994 | ||
3ee86942 MV |
995 | size_t |
996 | scm_c_string_length (SCM string) | |
997 | { | |
998 | if (!IS_STRING (string)) | |
999 | scm_wrong_type_arg_msg (NULL, 0, string, "string"); | |
1000 | return STRING_LENGTH (string); | |
1001 | } | |
1002 | ||
bd9e24b3 | 1003 | SCM_DEFINE (scm_string_ref, "string-ref", 2, 0, 0, |
6fa73e72 | 1004 | (SCM str, SCM k), |
9c44cd45 MG |
1005 | "Return character @var{k} of @var{str} using zero-origin\n" |
1006 | "indexing. @var{k} must be a valid index of @var{str}.") | |
1bbd0b84 | 1007 | #define FUNC_NAME s_scm_string_ref |
0f2d19dd | 1008 | { |
3ae3166b | 1009 | size_t len; |
a55c2b68 | 1010 | unsigned long idx; |
bd9e24b3 | 1011 | |
d1ca2c64 | 1012 | SCM_VALIDATE_STRING (1, str); |
3ae3166b LC |
1013 | |
1014 | len = scm_i_string_length (str); | |
1015 | if (SCM_LIKELY (len > 0)) | |
1016 | idx = scm_to_unsigned_integer (k, 0, len - 1); | |
1017 | else | |
1018 | scm_out_of_range (NULL, k); | |
1019 | ||
9c44cd45 MG |
1020 | if (scm_i_is_narrow_string (str)) |
1021 | return SCM_MAKE_CHAR (scm_i_string_chars (str)[idx]); | |
1022 | else | |
1023 | return SCM_MAKE_CHAR (scm_i_string_wide_chars (str)[idx]); | |
0f2d19dd | 1024 | } |
1bbd0b84 | 1025 | #undef FUNC_NAME |
0f2d19dd | 1026 | |
3ee86942 MV |
1027 | SCM |
1028 | scm_c_string_ref (SCM str, size_t p) | |
1029 | { | |
1030 | if (p >= scm_i_string_length (str)) | |
1031 | scm_out_of_range (NULL, scm_from_size_t (p)); | |
9c44cd45 MG |
1032 | if (scm_i_is_narrow_string (str)) |
1033 | return SCM_MAKE_CHAR (scm_i_string_chars (str)[p]); | |
1034 | else | |
1035 | return SCM_MAKE_CHAR (scm_i_string_wide_chars (str)[p]); | |
1036 | ||
3ee86942 | 1037 | } |
f0942910 | 1038 | |
3b3b36dd | 1039 | SCM_DEFINE (scm_string_set_x, "string-set!", 3, 0, 0, |
6fa73e72 | 1040 | (SCM str, SCM k, SCM chr), |
9c44cd45 MG |
1041 | "Store @var{chr} in element @var{k} of @var{str} and return\n" |
1042 | "an unspecified value. @var{k} must be a valid index of\n" | |
1043 | "@var{str}.") | |
1bbd0b84 | 1044 | #define FUNC_NAME s_scm_string_set_x |
0f2d19dd | 1045 | { |
3ae3166b | 1046 | size_t len; |
a55c2b68 MV |
1047 | unsigned long idx; |
1048 | ||
f0942910 | 1049 | SCM_VALIDATE_STRING (1, str); |
3ae3166b LC |
1050 | |
1051 | len = scm_i_string_length (str); | |
1052 | if (SCM_LIKELY (len > 0)) | |
1053 | idx = scm_to_unsigned_integer (k, 0, len - 1); | |
1054 | else | |
1055 | scm_out_of_range (NULL, k); | |
1056 | ||
34d19ef6 | 1057 | SCM_VALIDATE_CHAR (3, chr); |
9c44cd45 MG |
1058 | str = scm_i_string_start_writing (str); |
1059 | scm_i_string_set_x (str, idx, SCM_CHAR (chr)); | |
1060 | scm_i_string_stop_writing (); | |
1061 | ||
0f2d19dd JB |
1062 | return SCM_UNSPECIFIED; |
1063 | } | |
1bbd0b84 | 1064 | #undef FUNC_NAME |
0f2d19dd | 1065 | |
3ee86942 MV |
1066 | void |
1067 | scm_c_string_set_x (SCM str, size_t p, SCM chr) | |
1068 | { | |
1069 | if (p >= scm_i_string_length (str)) | |
1070 | scm_out_of_range (NULL, scm_from_size_t (p)); | |
9c44cd45 MG |
1071 | str = scm_i_string_start_writing (str); |
1072 | scm_i_string_set_x (str, p, SCM_CHAR (chr)); | |
1073 | scm_i_string_stop_writing (); | |
3ee86942 | 1074 | } |
0f2d19dd | 1075 | |
3b3b36dd | 1076 | SCM_DEFINE (scm_substring, "substring", 2, 1, 0, |
0d26a824 MG |
1077 | (SCM str, SCM start, SCM end), |
1078 | "Return a newly allocated string formed from the characters\n" | |
1079 | "of @var{str} beginning with index @var{start} (inclusive) and\n" | |
1080 | "ending with index @var{end} (exclusive).\n" | |
1081 | "@var{str} must be a string, @var{start} and @var{end} must be\n" | |
1082 | "exact integers satisfying:\n\n" | |
1083 | "0 <= @var{start} <= @var{end} <= (string-length @var{str}).") | |
1bbd0b84 | 1084 | #define FUNC_NAME s_scm_substring |
0f2d19dd | 1085 | { |
3ee86942 | 1086 | size_t len, from, to; |
685c0d71 | 1087 | |
d1ca2c64 | 1088 | SCM_VALIDATE_STRING (1, str); |
3ee86942 MV |
1089 | len = scm_i_string_length (str); |
1090 | from = scm_to_unsigned_integer (start, 0, len); | |
a55c2b68 | 1091 | if (SCM_UNBNDP (end)) |
3ee86942 | 1092 | to = len; |
a55c2b68 | 1093 | else |
3ee86942 MV |
1094 | to = scm_to_unsigned_integer (end, from, len); |
1095 | return scm_i_substring (str, from, to); | |
0f2d19dd | 1096 | } |
1bbd0b84 | 1097 | #undef FUNC_NAME |
0f2d19dd | 1098 | |
ed35de72 MV |
1099 | SCM_DEFINE (scm_substring_read_only, "substring/read-only", 2, 1, 0, |
1100 | (SCM str, SCM start, SCM end), | |
1101 | "Return a newly allocated string formed from the characters\n" | |
1102 | "of @var{str} beginning with index @var{start} (inclusive) and\n" | |
1103 | "ending with index @var{end} (exclusive).\n" | |
1104 | "@var{str} must be a string, @var{start} and @var{end} must be\n" | |
1105 | "exact integers satisfying:\n" | |
1106 | "\n" | |
1107 | "0 <= @var{start} <= @var{end} <= (string-length @var{str}).\n" | |
1108 | "\n" | |
1109 | "The returned string is read-only.\n") | |
1110 | #define FUNC_NAME s_scm_substring_read_only | |
1111 | { | |
1112 | size_t len, from, to; | |
1113 | ||
1114 | SCM_VALIDATE_STRING (1, str); | |
1115 | len = scm_i_string_length (str); | |
1116 | from = scm_to_unsigned_integer (start, 0, len); | |
1117 | if (SCM_UNBNDP (end)) | |
1118 | to = len; | |
1119 | else | |
1120 | to = scm_to_unsigned_integer (end, from, len); | |
1121 | return scm_i_substring_read_only (str, from, to); | |
1122 | } | |
1123 | #undef FUNC_NAME | |
1124 | ||
3ee86942 MV |
1125 | SCM_DEFINE (scm_substring_copy, "substring/copy", 2, 1, 0, |
1126 | (SCM str, SCM start, SCM end), | |
1127 | "Return a newly allocated string formed from the characters\n" | |
1128 | "of @var{str} beginning with index @var{start} (inclusive) and\n" | |
1129 | "ending with index @var{end} (exclusive).\n" | |
1130 | "@var{str} must be a string, @var{start} and @var{end} must be\n" | |
1131 | "exact integers satisfying:\n\n" | |
1132 | "0 <= @var{start} <= @var{end} <= (string-length @var{str}).") | |
1133 | #define FUNC_NAME s_scm_substring_copy | |
1134 | { | |
e1b29f6a MV |
1135 | /* For the Scheme version, START is mandatory, but for the C |
1136 | version, it is optional. See scm_string_copy in srfi-13.c for a | |
1137 | rationale. | |
1138 | */ | |
1139 | ||
1140 | size_t from, to; | |
3ee86942 MV |
1141 | |
1142 | SCM_VALIDATE_STRING (1, str); | |
e1b29f6a MV |
1143 | scm_i_get_substring_spec (scm_i_string_length (str), |
1144 | start, &from, end, &to); | |
3ee86942 MV |
1145 | return scm_i_substring_copy (str, from, to); |
1146 | } | |
1147 | #undef FUNC_NAME | |
1148 | ||
1149 | SCM_DEFINE (scm_substring_shared, "substring/shared", 2, 1, 0, | |
1150 | (SCM str, SCM start, SCM end), | |
1151 | "Return string that indirectly refers to the characters\n" | |
1152 | "of @var{str} beginning with index @var{start} (inclusive) and\n" | |
1153 | "ending with index @var{end} (exclusive).\n" | |
1154 | "@var{str} must be a string, @var{start} and @var{end} must be\n" | |
1155 | "exact integers satisfying:\n\n" | |
1156 | "0 <= @var{start} <= @var{end} <= (string-length @var{str}).") | |
1157 | #define FUNC_NAME s_scm_substring_shared | |
1158 | { | |
1159 | size_t len, from, to; | |
1160 | ||
1161 | SCM_VALIDATE_STRING (1, str); | |
1162 | len = scm_i_string_length (str); | |
1163 | from = scm_to_unsigned_integer (start, 0, len); | |
1164 | if (SCM_UNBNDP (end)) | |
1165 | to = len; | |
1166 | else | |
1167 | to = scm_to_unsigned_integer (end, from, len); | |
1168 | return scm_i_substring_shared (str, from, to); | |
1169 | } | |
1170 | #undef FUNC_NAME | |
685c0d71 | 1171 | |
3b3b36dd | 1172 | SCM_DEFINE (scm_string_append, "string-append", 0, 0, 1, |
6fa73e72 | 1173 | (SCM args), |
9c44cd45 | 1174 | "Return a newly allocated string whose characters form the\n" |
0d26a824 | 1175 | "concatenation of the given strings, @var{args}.") |
1bbd0b84 | 1176 | #define FUNC_NAME s_scm_string_append |
0f2d19dd JB |
1177 | { |
1178 | SCM res; | |
9c44cd45 MG |
1179 | size_t len = 0; |
1180 | int wide = 0; | |
c829a427 MV |
1181 | SCM l, s; |
1182 | char *data; | |
9c44cd45 MG |
1183 | scm_t_wchar *wdata; |
1184 | int i; | |
af45e3b0 DH |
1185 | |
1186 | SCM_VALIDATE_REST_ARGUMENT (args); | |
9c44cd45 | 1187 | for (l = args; !scm_is_null (l); l = SCM_CDR (l)) |
c829a427 MV |
1188 | { |
1189 | s = SCM_CAR (l); | |
1190 | SCM_VALIDATE_STRING (SCM_ARGn, s); | |
9c44cd45 MG |
1191 | len += scm_i_string_length (s); |
1192 | if (!scm_i_is_narrow_string (s)) | |
1193 | wide = 1; | |
c829a427 | 1194 | } |
9c44cd45 MG |
1195 | if (!wide) |
1196 | res = scm_i_make_string (len, &data); | |
1197 | else | |
1198 | res = scm_i_make_wide_string (len, &wdata); | |
1199 | ||
1200 | for (l = args; !scm_is_null (l); l = SCM_CDR (l)) | |
c829a427 | 1201 | { |
edea856c | 1202 | size_t len; |
c829a427 | 1203 | s = SCM_CAR (l); |
3ee86942 | 1204 | SCM_VALIDATE_STRING (SCM_ARGn, s); |
edea856c | 1205 | len = scm_i_string_length (s); |
9c44cd45 MG |
1206 | if (!wide) |
1207 | { | |
1208 | memcpy (data, scm_i_string_chars (s), len); | |
1209 | data += len; | |
1210 | } | |
1211 | else | |
1212 | { | |
1213 | if (scm_i_is_narrow_string (s)) | |
1214 | { | |
1215 | for (i = 0; i < scm_i_string_length (s); i++) | |
1216 | wdata[i] = (unsigned char) scm_i_string_chars (s)[i]; | |
1217 | } | |
1218 | else | |
1219 | u32_cpy ((scm_t_uint32 *) wdata, | |
1220 | (scm_t_uint32 *) scm_i_string_wide_chars (s), len); | |
1221 | wdata += len; | |
1222 | } | |
c829a427 MV |
1223 | scm_remember_upto_here_1 (s); |
1224 | } | |
0f2d19dd JB |
1225 | return res; |
1226 | } | |
1bbd0b84 | 1227 | #undef FUNC_NAME |
0f2d19dd | 1228 | |
c829a427 MV |
1229 | int |
1230 | scm_is_string (SCM obj) | |
1231 | { | |
3ee86942 | 1232 | return IS_STRING (obj); |
c829a427 | 1233 | } |
24933780 | 1234 | |
c829a427 MV |
1235 | SCM |
1236 | scm_from_locale_stringn (const char *str, size_t len) | |
1237 | { | |
1238 | SCM res; | |
1239 | char *dst; | |
4d4528e7 | 1240 | |
9c44cd45 | 1241 | if (len == (size_t) -1) |
c829a427 | 1242 | len = strlen (str); |
9c44cd45 MG |
1243 | if (len == 0) |
1244 | return scm_nullstr; | |
1245 | ||
3ee86942 | 1246 | res = scm_i_make_string (len, &dst); |
c829a427 MV |
1247 | memcpy (dst, str, len); |
1248 | return res; | |
1249 | } | |
4d4528e7 | 1250 | |
c829a427 MV |
1251 | SCM |
1252 | scm_from_locale_string (const char *str) | |
4d4528e7 | 1253 | { |
9c44cd45 MG |
1254 | if (str == NULL) |
1255 | return scm_nullstr; | |
1256 | ||
c829a427 MV |
1257 | return scm_from_locale_stringn (str, -1); |
1258 | } | |
4d4528e7 | 1259 | |
50b1996f MG |
1260 | /* Create a new scheme string from the C string STR. The memory of |
1261 | STR may be used directly as storage for the new string. */ | |
c829a427 MV |
1262 | SCM |
1263 | scm_take_locale_stringn (char *str, size_t len) | |
1264 | { | |
48ddf0d9 KR |
1265 | SCM buf, res; |
1266 | ||
9c44cd45 | 1267 | if (len == (size_t) -1) |
48ddf0d9 | 1268 | len = strlen (str); |
c829a427 MV |
1269 | else |
1270 | { | |
48ddf0d9 KR |
1271 | /* Ensure STR is null terminated. A realloc for 1 extra byte should |
1272 | often be satisfied from the alignment padding after the block, with | |
1273 | no actual data movement. */ | |
9c44cd45 | 1274 | str = scm_realloc (str, len + 1); |
48ddf0d9 | 1275 | str[len] = '\0'; |
c829a427 | 1276 | } |
c829a427 | 1277 | |
fd0a5bbc | 1278 | buf = scm_i_take_stringbufn (str, len); |
3ee86942 | 1279 | res = scm_double_cell (STRING_TAG, |
9c44cd45 | 1280 | SCM_UNPACK (buf), (scm_t_bits) 0, (scm_t_bits) len); |
c829a427 MV |
1281 | return res; |
1282 | } | |
1283 | ||
48ddf0d9 KR |
1284 | SCM |
1285 | scm_take_locale_string (char *str) | |
1286 | { | |
1287 | return scm_take_locale_stringn (str, -1); | |
1288 | } | |
1289 | ||
9c44cd45 MG |
1290 | /* Change libunistring escapes (\uXXXX and \UXXXXXXXX) to \xXX \uXXXX |
1291 | and \UXXXXXX. */ | |
1292 | static void | |
1293 | unistring_escapes_to_guile_escapes (char **bufp, size_t *lenp) | |
1294 | { | |
1295 | char *before, *after; | |
1296 | size_t i, j; | |
1297 | ||
1298 | before = *bufp; | |
1299 | after = *bufp; | |
1300 | i = 0; | |
1301 | j = 0; | |
1302 | while (i < *lenp) | |
1303 | { | |
1304 | if ((i <= *lenp - 6) | |
1305 | && before[i] == '\\' | |
1306 | && before[i + 1] == 'u' | |
1307 | && before[i + 2] == '0' && before[i + 3] == '0') | |
1308 | { | |
1309 | /* Convert \u00NN to \xNN */ | |
1310 | after[j] = '\\'; | |
1311 | after[j + 1] = 'x'; | |
1312 | after[j + 2] = tolower (before[i + 4]); | |
1313 | after[j + 3] = tolower (before[i + 5]); | |
1314 | i += 6; | |
1315 | j += 4; | |
1316 | } | |
1317 | else if ((i <= *lenp - 10) | |
1318 | && before[i] == '\\' | |
1319 | && before[i + 1] == 'U' | |
1320 | && before[i + 2] == '0' && before[i + 3] == '0') | |
1321 | { | |
1322 | /* Convert \U00NNNNNN to \UNNNNNN */ | |
1323 | after[j] = '\\'; | |
1324 | after[j + 1] = 'U'; | |
1325 | after[j + 2] = tolower (before[i + 4]); | |
1326 | after[j + 3] = tolower (before[i + 5]); | |
1327 | after[j + 4] = tolower (before[i + 6]); | |
1328 | after[j + 5] = tolower (before[i + 7]); | |
1329 | after[j + 6] = tolower (before[i + 8]); | |
1330 | after[j + 7] = tolower (before[i + 9]); | |
1331 | i += 10; | |
1332 | j += 8; | |
1333 | } | |
1334 | else | |
1335 | { | |
1336 | after[j] = before[i]; | |
1337 | i++; | |
1338 | j++; | |
1339 | } | |
1340 | } | |
1341 | *lenp = j; | |
1342 | after = scm_realloc (after, j); | |
1343 | } | |
1344 | ||
c829a427 | 1345 | char * |
9c44cd45 | 1346 | scm_to_locale_stringn (SCM str, size_t * lenp) |
c829a427 | 1347 | { |
9c44cd45 MG |
1348 | const char *enc; |
1349 | ||
1350 | /* In the future, enc will hold the port's encoding. */ | |
1351 | enc = NULL; | |
1352 | ||
1353 | return scm_to_stringn (str, lenp, enc, iconveh_escape_sequence); | |
1354 | } | |
1355 | ||
1356 | /* Low-level scheme to C string conversion function. */ | |
1357 | char * | |
1358 | scm_to_stringn (SCM str, size_t * lenp, const char *encoding, | |
1359 | enum iconv_ilseq_handler handler) | |
1360 | { | |
1361 | static const char iso[11] = "ISO-8859-1"; | |
1362 | char *buf; | |
1363 | size_t ilen, len, i; | |
4d4528e7 | 1364 | |
3ee86942 | 1365 | if (!scm_is_string (str)) |
c829a427 | 1366 | scm_wrong_type_arg_msg (NULL, 0, str, "string"); |
9c44cd45 MG |
1367 | ilen = scm_i_string_length (str); |
1368 | ||
1369 | if (ilen == 0) | |
1370 | { | |
1371 | buf = scm_malloc (1); | |
1372 | buf[0] = '\0'; | |
1373 | if (lenp) | |
1374 | *lenp = 0; | |
1375 | return buf; | |
1376 | } | |
1377 | ||
c829a427 | 1378 | if (lenp == NULL) |
9c44cd45 MG |
1379 | for (i = 0; i < ilen; i++) |
1380 | if (scm_i_string_ref (str, i) == '\0') | |
1381 | scm_misc_error (NULL, | |
1382 | "string contains #\\nul character: ~S", | |
1383 | scm_list_1 (str)); | |
1384 | ||
1385 | if (scm_i_is_narrow_string (str)) | |
c829a427 | 1386 | { |
9c44cd45 MG |
1387 | if (lenp) |
1388 | { | |
1389 | buf = scm_malloc (ilen); | |
1390 | memcpy (buf, scm_i_string_chars (str), ilen); | |
1391 | *lenp = ilen; | |
1392 | return buf; | |
1393 | } | |
1394 | else | |
1395 | { | |
1396 | buf = scm_malloc (ilen + 1); | |
1397 | memcpy (buf, scm_i_string_chars (str), ilen); | |
1398 | buf[ilen] = '\0'; | |
1399 | return buf; | |
1400 | } | |
c829a427 | 1401 | } |
9c44cd45 MG |
1402 | |
1403 | ||
1404 | buf = NULL; | |
1405 | len = 0; | |
1406 | buf = u32_conv_to_encoding (iso, | |
1407 | handler, | |
1408 | (scm_t_uint32 *) scm_i_string_wide_chars (str), | |
1409 | ilen, NULL, NULL, &len); | |
1410 | if (buf == NULL) | |
1411 | scm_misc_error (NULL, "cannot convert to output locale ~s: \"~s\"", | |
1412 | scm_list_2 (scm_from_locale_string (iso), str)); | |
1413 | ||
1414 | if (handler == iconveh_escape_sequence) | |
1415 | unistring_escapes_to_guile_escapes (&buf, &len); | |
1416 | ||
1417 | if (lenp) | |
4d4528e7 | 1418 | *lenp = len; |
9c44cd45 MG |
1419 | else |
1420 | { | |
1421 | buf = scm_realloc (buf, len + 1); | |
1422 | buf[len] = '\0'; | |
1423 | } | |
24933780 | 1424 | |
c829a427 | 1425 | scm_remember_upto_here_1 (str); |
9c44cd45 | 1426 | return buf; |
4d4528e7 | 1427 | } |
af68e5e5 | 1428 | |
c829a427 MV |
1429 | char * |
1430 | scm_to_locale_string (SCM str) | |
1431 | { | |
1432 | return scm_to_locale_stringn (str, NULL); | |
1433 | } | |
af68e5e5 | 1434 | |
c829a427 MV |
1435 | size_t |
1436 | scm_to_locale_stringbuf (SCM str, char *buf, size_t max_len) | |
1437 | { | |
1438 | size_t len; | |
9c44cd45 | 1439 | char *result = NULL; |
3ee86942 | 1440 | if (!scm_is_string (str)) |
c829a427 | 1441 | scm_wrong_type_arg_msg (NULL, 0, str, "string"); |
9c44cd45 MG |
1442 | result = scm_to_locale_stringn (str, &len); |
1443 | ||
1444 | memcpy (buf, result, (len > max_len) ? max_len : len); | |
1445 | free (result); | |
1446 | ||
c829a427 MV |
1447 | scm_remember_upto_here_1 (str); |
1448 | return len; | |
1449 | } | |
af68e5e5 | 1450 | |
3ee86942 MV |
1451 | /* converts C scm_array of strings to SCM scm_list of strings. */ |
1452 | /* If argc < 0, a null terminated scm_array is assumed. */ | |
9c44cd45 | 1453 | SCM |
3ee86942 MV |
1454 | scm_makfromstrs (int argc, char **argv) |
1455 | { | |
1456 | int i = argc; | |
1457 | SCM lst = SCM_EOL; | |
1458 | if (0 > i) | |
1459 | for (i = 0; argv[i]; i++); | |
1460 | while (i--) | |
1461 | lst = scm_cons (scm_from_locale_string (argv[i]), lst); | |
1462 | return lst; | |
1463 | } | |
1464 | ||
c829a427 MV |
1465 | /* Return a newly allocated array of char pointers to each of the strings |
1466 | in args, with a terminating NULL pointer. */ | |
1467 | ||
1468 | char ** | |
1469 | scm_i_allocate_string_pointers (SCM list) | |
af68e5e5 | 1470 | { |
c829a427 MV |
1471 | char **result; |
1472 | int len = scm_ilength (list); | |
1473 | int i; | |
1474 | ||
1475 | if (len < 0) | |
1476 | scm_wrong_type_arg_msg (NULL, 0, list, "proper list"); | |
1477 | ||
661ae7ab | 1478 | scm_dynwind_begin (0); |
c829a427 MV |
1479 | |
1480 | result = (char **) scm_malloc ((len + 1) * sizeof (char *)); | |
1481 | result[len] = NULL; | |
661ae7ab | 1482 | scm_dynwind_unwind_handler (free, result, 0); |
c829a427 MV |
1483 | |
1484 | /* The list might be have been modified in another thread, so | |
1485 | we check LIST before each access. | |
1486 | */ | |
d2e53ed6 | 1487 | for (i = 0; i < len && scm_is_pair (list); i++) |
c829a427 MV |
1488 | { |
1489 | result[i] = scm_to_locale_string (SCM_CAR (list)); | |
1490 | list = SCM_CDR (list); | |
1491 | } | |
1492 | ||
661ae7ab | 1493 | scm_dynwind_end (); |
c829a427 | 1494 | return result; |
af68e5e5 | 1495 | } |
e53cc817 | 1496 | |
c829a427 MV |
1497 | void |
1498 | scm_i_free_string_pointers (char **pointers) | |
1499 | { | |
1500 | int i; | |
1501 | ||
1502 | for (i = 0; pointers[i]; i++) | |
1503 | free (pointers[i]); | |
1504 | free (pointers); | |
1505 | } | |
24933780 | 1506 | |
6f14f578 MV |
1507 | void |
1508 | scm_i_get_substring_spec (size_t len, | |
1509 | SCM start, size_t *cstart, | |
1510 | SCM end, size_t *cend) | |
1511 | { | |
1512 | if (SCM_UNBNDP (start)) | |
1513 | *cstart = 0; | |
1514 | else | |
1515 | *cstart = scm_to_unsigned_integer (start, 0, len); | |
1516 | ||
1517 | if (SCM_UNBNDP (end)) | |
1518 | *cend = len; | |
1519 | else | |
1520 | *cend = scm_to_unsigned_integer (end, *cstart, len); | |
1521 | } | |
1522 | ||
3ee86942 MV |
1523 | #if SCM_ENABLE_DEPRECATED |
1524 | ||
556d75db MV |
1525 | /* When these definitions are removed, it becomes reasonable to use |
1526 | read-only strings for string literals. For that, change the reader | |
1527 | to create string literals with scm_c_substring_read_only instead of | |
1528 | with scm_c_substring_copy. | |
1529 | */ | |
1530 | ||
3ee86942 | 1531 | int |
fe78c51a | 1532 | scm_i_deprecated_stringp (SCM str) |
3ee86942 MV |
1533 | { |
1534 | scm_c_issue_deprecation_warning | |
1535 | ("SCM_STRINGP is deprecated. Use scm_is_string instead."); | |
1536 | ||
2616f0e0 | 1537 | return scm_is_string (str); |
3ee86942 MV |
1538 | } |
1539 | ||
1540 | char * | |
fe78c51a | 1541 | scm_i_deprecated_string_chars (SCM str) |
3ee86942 MV |
1542 | { |
1543 | char *chars; | |
1544 | ||
1545 | scm_c_issue_deprecation_warning | |
1546 | ("SCM_STRING_CHARS is deprecated. See the manual for alternatives."); | |
1547 | ||
2616f0e0 MV |
1548 | /* We don't accept shared substrings here since they are not |
1549 | null-terminated. | |
1550 | */ | |
1551 | if (IS_SH_STRING (str)) | |
1552 | scm_misc_error (NULL, | |
1553 | "SCM_STRING_CHARS does not work with shared substrings.", | |
1554 | SCM_EOL); | |
1555 | ||
877f06c3 | 1556 | /* We explicitly test for read-only strings to produce a better |
556d75db MV |
1557 | error message. |
1558 | */ | |
1559 | ||
1560 | if (IS_RO_STRING (str)) | |
1561 | scm_misc_error (NULL, | |
1562 | "SCM_STRING_CHARS does not work with read-only strings.", | |
1563 | SCM_EOL); | |
1564 | ||
2616f0e0 | 1565 | /* The following is still wrong, of course... |
3ee86942 | 1566 | */ |
9c44cd45 | 1567 | str = scm_i_string_start_writing (str); |
3ee86942 MV |
1568 | chars = scm_i_string_writable_chars (str); |
1569 | scm_i_string_stop_writing (); | |
1570 | return chars; | |
1571 | } | |
1572 | ||
1573 | size_t | |
fe78c51a | 1574 | scm_i_deprecated_string_length (SCM str) |
3ee86942 MV |
1575 | { |
1576 | scm_c_issue_deprecation_warning | |
1577 | ("SCM_STRING_LENGTH is deprecated. Use scm_c_string_length instead."); | |
1578 | return scm_c_string_length (str); | |
1579 | } | |
1580 | ||
1581 | #endif | |
1582 | ||
0f2d19dd JB |
1583 | void |
1584 | scm_init_strings () | |
0f2d19dd | 1585 | { |
3ee86942 | 1586 | scm_nullstr = scm_i_make_string (0, NULL); |
7c33806a | 1587 | |
a0599745 | 1588 | #include "libguile/strings.x" |
0f2d19dd JB |
1589 | } |
1590 | ||
89e00824 ML |
1591 | |
1592 | /* | |
1593 | Local Variables: | |
1594 | c-file-style: "gnu" | |
1595 | End: | |
1596 | */ |