?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
Add missing library to output of --version-full
[claws.git] / src / codeconv.c
blob0d2438bdf3021cb1e622c060344af2125a395c7f
1 /*
2 * Sylpheed -- a GTK+ based, lightweight, and fast e-mail client
3 * Copyright (C) 1999-2012 Hiroyuki Yamamoto and the Claws Mail team
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 3 of the License, or
8 * (at your option) any later version.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program. If not, see <http://www.gnu.org/licenses/>.
17 *
18 */
19
20 #ifdef HAVE_CONFIG_H
21 # include "config.h"
22 #include "claws-features.h"
23 #endif
24
25 #include "defs.h"
26
27 #include <glib.h>
28 #include <glib/gi18n.h>
29 #include <string.h>
30 #include <ctype.h>
31 #include <stdlib.h>
32 #include <errno.h>
33
34 #if HAVE_LOCALE_H
35 # include <locale.h>
36 #endif
37
38 #include "codeconv.h"
39 #include "unmime.h"
40 #include "quoted-printable.h"
41 #include "utils.h"
42 #include "prefs_common.h"
43
44 /* For unknown reasons the inconv.m4 macro undefs that macro if no
45 const is needed. This would break the code below so we define it. */
46 #ifndef ICONV_CONST
47 #define ICONV_CONST
48 #endif
49
50 typedef enum
51 {
52 JIS_ASCII,
53 JIS_KANJI,
54 JIS_HWKANA,
55 JIS_AUXKANJI
56 } JISState;
57
58 #define SUBST_CHAR 0x5f;
59 #define ESC '\033'
60
61 #define iseuckanji(c) \
62 (((c) & 0xff) >= 0xa1 && ((c) & 0xff) <= 0xfe)
63 #define iseuchwkana1(c) \
64 (((c) & 0xff) == 0x8e)
65 #define iseuchwkana2(c) \
66 (((c) & 0xff) >= 0xa1 && ((c) & 0xff) <= 0xdf)
67 #define iseucaux(c) \
68 (((c) & 0xff) == 0x8f)
69 #define issjiskanji1(c) \
70 ((((c) & 0xff) >= 0x81 && ((c) & 0xff) <= 0x9f) || \
71 (((c) & 0xff) >= 0xe0 && ((c) & 0xff) <= 0xfc))
72 #define issjiskanji2(c) \
73 ((((c) & 0xff) >= 0x40 && ((c) & 0xff) <= 0x7e) || \
74 (((c) & 0xff) >= 0x80 && ((c) & 0xff) <= 0xfc))
75 #define issjishwkana(c) \
76 (((c) & 0xff) >= 0xa1 && ((c) & 0xff) <= 0xdf)
77
78 #define K_IN() \
79 if (state != JIS_KANJI) { \
80 *out++ = ESC; \
81 *out++ = '$'; \
82 *out++ = 'B'; \
83 state = JIS_KANJI; \
84 }
85
86 #define K_OUT() \
87 if (state != JIS_ASCII) { \
88 *out++ = ESC; \
89 *out++ = '('; \
90 *out++ = 'B'; \
91 state = JIS_ASCII; \
92 }
93
94 #define HW_IN() \
95 if (state != JIS_HWKANA) { \
96 *out++ = ESC; \
97 *out++ = '('; \
98 *out++ = 'I'; \
99 state = JIS_HWKANA; \
100 }
101
102 #define AUX_IN() \
103 if (state != JIS_AUXKANJI) { \
104 *out++ = ESC; \
105 *out++ = '$'; \
106 *out++ = '('; \
107 *out++ = 'D'; \
108 state = JIS_AUXKANJI; \
109 }
110
111 static CodeConvFunc conv_get_code_conv_func (const gchar *src_charset_str,
112 const gchar *dest_charset_str);
113
114 static gchar *conv_iconv_strdup_with_cd (const gchar *inbuf,
115 iconv_t cd);
116
117 static gchar *conv_iconv_strdup (const gchar *inbuf,
118 const gchar *src_code,
119 const gchar *dest_code);
120
121 static CharSet conv_get_locale_charset (void);
122 static CharSet conv_get_outgoing_charset (void);
123 static CharSet conv_guess_ja_encoding(const gchar *str);
124 static gboolean conv_is_ja_locale (void);
125
126 static gint conv_jistoeuc(gchar *outbuf, gint outlen, const gchar *inbuf);
127 static gint conv_euctojis(gchar *outbuf, gint outlen, const gchar *inbuf);
128 static gint conv_sjistoeuc(gchar *outbuf, gint outlen, const gchar *inbuf);
129
130 static gint conv_jistoutf8(gchar *outbuf, gint outlen, const gchar *inbuf);
131 static gint conv_sjistoutf8(gchar *outbuf, gint outlen, const gchar *inbuf);
132 static gint conv_euctoutf8(gchar *outbuf, gint outlen, const gchar *inbuf);
133 static gint conv_anytoutf8(gchar *outbuf, gint outlen, const gchar *inbuf);
134
135 static gint conv_utf8toeuc(gchar *outbuf, gint outlen, const gchar *inbuf);
136 static gint conv_utf8tojis(gchar *outbuf, gint outlen, const gchar *inbuf);
137
138 static void conv_unreadable_8bit(gchar *str);
139
140 static gint conv_jistodisp(gchar *outbuf, gint outlen, const gchar *inbuf);
141 static gint conv_sjistodisp(gchar *outbuf, gint outlen, const gchar *inbuf);
142 static gint conv_euctodisp(gchar *outbuf, gint outlen, const gchar *inbuf);
143
144 static gint conv_anytodisp(gchar *outbuf, gint outlen, const gchar *inbuf);
145 static gint conv_ustodisp(gchar *outbuf, gint outlen, const gchar *inbuf);
146 static gint conv_noconv(gchar *outbuf, gint outlen, const gchar *inbuf);
147
148 static gboolean strict_mode = FALSE;
149
150 void codeconv_set_strict(gboolean mode)
151 {
152 strict_mode = mode;
153 }
154
155 static gint conv_jistoeuc(gchar *outbuf, gint outlen, const gchar *inbuf)
156 {
157 const guchar *in = inbuf;
158 gchar *out = outbuf;
159 JISState state = JIS_ASCII;
160
161 /*
162 * Loop outputs up to 3 bytes in each pass (aux kanji) and we
163 * need 1 byte to terminate the output
164 */
165 while (*in != '\0' && (out - outbuf) < outlen - 4) {
166 if (*in == ESC) {
167 in++;
168 if (*in == '$') {
169 if (*(in + 1) == '@' || *(in + 1) == 'B') {
170 state = JIS_KANJI;
171 in += 2;
172 } else if (*(in + 1) == '(' &&
173 *(in + 2) == 'D') {
174 state = JIS_AUXKANJI;
175 in += 3;
176 } else {
177 /* unknown escape sequence */
178 state = JIS_ASCII;
179 }
180 } else if (*in == '(') {
181 if (*(in + 1) == 'B' || *(in + 1) == 'J') {
182 state = JIS_ASCII;
183 in += 2;
184 } else if (*(in + 1) == 'I') {
185 state = JIS_HWKANA;
186 in += 2;
187 } else {
188 /* unknown escape sequence */
189 state = JIS_ASCII;
190 }
191 } else {
192 /* unknown escape sequence */
193 state = JIS_ASCII;
194 }
195 } else if (*in == 0x0e) {
196 state = JIS_HWKANA;
197 in++;
198 } else if (*in == 0x0f) {
199 state = JIS_ASCII;
200 in++;
201 } else {
202 switch (state) {
203 case JIS_ASCII:
204 *out++ = *in++;
205 break;
206 case JIS_KANJI:
207 *out++ = *in++ | 0x80;
208 if (*in == '\0') break;
209 *out++ = *in++ | 0x80;
210 break;
211 case JIS_HWKANA:
212 *out++ = 0x8e;
213 *out++ = *in++ | 0x80;
214 break;
215 case JIS_AUXKANJI:
216 *out++ = 0x8f;
217 *out++ = *in++ | 0x80;
218 if (*in == '\0') break;
219 *out++ = *in++ | 0x80;
220 break;
221 }
222 }
223 }
224
225 *out = '\0';
226 return 0;
227 }
228
229 #define JIS_HWDAKUTEN 0x5e
230 #define JIS_HWHANDAKUTEN 0x5f
231
232 static gint conv_jis_hantozen(guchar *outbuf, guchar jis_code, guchar sound_sym)
233 {
234 static guint16 h2z_tbl[] = {
235 /* 0x20 - 0x2f */
236 0x0000, 0x2123, 0x2156, 0x2157, 0x2122, 0x2126, 0x2572, 0x2521,
237 0x2523, 0x2525, 0x2527, 0x2529, 0x2563, 0x2565, 0x2567, 0x2543,
238 /* 0x30 - 0x3f */
239 0x213c, 0x2522, 0x2524, 0x2526, 0x2528, 0x252a, 0x252b, 0x252d,
240 0x252f, 0x2531, 0x2533, 0x2535, 0x2537, 0x2539, 0x253b, 0x253d,
241 /* 0x40 - 0x4f */
242 0x253f, 0x2541, 0x2544, 0x2546, 0x2548, 0x254a, 0x254b, 0x254c,
243 0x254d, 0x254e, 0x254f, 0x2552, 0x2555, 0x2558, 0x255b, 0x255e,
244 /* 0x50 - 0x5f */
245 0x255f, 0x2560, 0x2561, 0x2562, 0x2564, 0x2566, 0x2568, 0x2569,
246 0x256a, 0x256b, 0x256c, 0x256d, 0x256f, 0x2573, 0x212b, 0x212c
247 };
248
249 static guint16 dakuten_tbl[] = {
250 /* 0x30 - 0x3f */
251 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x252c, 0x252e,
252 0x2530, 0x2532, 0x2534, 0x2536, 0x2538, 0x253a, 0x253c, 0x253e,
253 /* 0x40 - 0x4f */
254 0x2540, 0x2542, 0x2545, 0x2547, 0x2549, 0x0000, 0x0000, 0x0000,
255 0x0000, 0x0000, 0x2550, 0x2553, 0x2556, 0x2559, 0x255c, 0x0000
256 };
257
258 static guint16 handakuten_tbl[] = {
259 /* 0x4a - 0x4e */
260 0x2551, 0x2554, 0x2557, 0x255a, 0x255d
261 };
262
263 guint16 out_code;
264
265 jis_code &= 0x7f;
266 sound_sym &= 0x7f;
267
268 if (jis_code < 0x21 || jis_code > 0x5f)
269 return 0;
270
271 if (sound_sym == JIS_HWDAKUTEN &&
272 jis_code >= 0x36 && jis_code <= 0x4e) {
273 out_code = dakuten_tbl[jis_code - 0x30];
274 if (out_code != 0) {
275 *outbuf = out_code >> 8;
276 *(outbuf + 1) = out_code & 0xff;
277 return 2;
278 }
279 }
280
281 if (sound_sym == JIS_HWHANDAKUTEN &&
282 jis_code >= 0x4a && jis_code <= 0x4e) {
283 out_code = handakuten_tbl[jis_code - 0x4a];
284 *outbuf = out_code >> 8;
285 *(outbuf + 1) = out_code & 0xff;
286 return 2;
287 }
288
289 out_code = h2z_tbl[jis_code - 0x20];
290 *outbuf = out_code >> 8;
291 *(outbuf + 1) = out_code & 0xff;
292 return 1;
293 }
294
295 static gint conv_euctojis(gchar *outbuf, gint outlen, const gchar *inbuf)
296 {
297 const guchar *in = inbuf;
298 gchar *out = outbuf;
299 JISState state = JIS_ASCII;
300
301 /*
302 * Loop outputs up to 6 bytes in each pass (aux shift + aux
303 * kanji) and we need up to 4 bytes to terminate the output
304 * (ASCII shift + null)
305 */
306 while (*in != '\0' && (out - outbuf) < outlen - 10) {
307 if (IS_ASCII(*in)) {
308 K_OUT();
309 *out++ = *in++;
310 } else if (iseuckanji(*in)) {
311 if (iseuckanji(*(in + 1))) {
312 K_IN();
313 *out++ = *in++ & 0x7f;
314 *out++ = *in++ & 0x7f;
315 } else {
316 K_OUT();
317 *out++ = SUBST_CHAR;
318 in++;
319 if (*in != '\0' && !IS_ASCII(*in)) {
320 *out++ = SUBST_CHAR;
321 in++;
322 }
323 }
324 } else if (iseuchwkana1(*in)) {
325 if (iseuchwkana2(*(in + 1))) {
326 if (prefs_common.allow_jisx0201_kana) {
327 HW_IN();
328 in++;
329 *out++ = *in++ & 0x7f;
330 } else {
331 guchar jis_ch[2];
332 gint len;
333
334 if (iseuchwkana1(*(in + 2)) &&
335 iseuchwkana2(*(in + 3)))
336 len = conv_jis_hantozen
337 (jis_ch,
338 *(in + 1), *(in + 3));
339 else
340 len = conv_jis_hantozen
341 (jis_ch,
342 *(in + 1), '\0');
343 if (len == 0)
344 in += 2;
345 else {
346 K_IN();
347 in += len * 2;
348 *out++ = jis_ch[0];
349 *out++ = jis_ch[1];
350 }
351 }
352 } else {
353 K_OUT();
354 in++;
355 if (*in != '\0' && !IS_ASCII(*in)) {
356 *out++ = SUBST_CHAR;
357 in++;
358 }
359 }
360 } else if (iseucaux(*in)) {
361 in++;
362 if (iseuckanji(*in) && iseuckanji(*(in + 1))) {
363 AUX_IN();
364 *out++ = *in++ & 0x7f;
365 *out++ = *in++ & 0x7f;
366 } else {
367 K_OUT();
368 if (*in != '\0' && !IS_ASCII(*in)) {
369 *out++ = SUBST_CHAR;
370 in++;
371 if (*in != '\0' && !IS_ASCII(*in)) {
372 *out++ = SUBST_CHAR;
373 in++;
374 }
375 }
376 }
377 } else {
378 K_OUT();
379 *out++ = SUBST_CHAR;
380 in++;
381 }
382 }
383
384 K_OUT();
385 *out = '\0';
386 return 0;
387 }
388
389 static gint conv_sjistoeuc(gchar *outbuf, gint outlen, const gchar *inbuf)
390 {
391 const guchar *in = inbuf;
392 gchar *out = outbuf;
393
394 /*
395 * Loop outputs up to 2 bytes in each pass and we need 1 byte
396 * to terminate the output
397 */
398 while (*in != '\0' && (out - outbuf) < outlen - 3) {
399 if (IS_ASCII(*in)) {
400 *out++ = *in++;
401 } else if (issjiskanji1(*in)) {
402 if (issjiskanji2(*(in + 1))) {
403 guchar out1 = *in;
404 guchar out2 = *(in + 1);
405 guchar row;
406
407 row = out1 < 0xa0 ? 0x70 : 0xb0;
408 if (out2 < 0x9f) {
409 out1 = (out1 - row) * 2 - 1;
410 out2 -= out2 > 0x7f ? 0x20 : 0x1f;
411 } else {
412 out1 = (out1 - row) * 2;
413 out2 -= 0x7e;
414 }
415
416 *out++ = out1 | 0x80;
417 *out++ = out2 | 0x80;
418 in += 2;
419 } else {
420 *out++ = SUBST_CHAR;
421 in++;
422 if (*in != '\0' && !IS_ASCII(*in)) {
423 *out++ = SUBST_CHAR;
424 in++;
425 }
426 }
427 } else if (issjishwkana(*in)) {
428 *out++ = 0x8e;
429 *out++ = *in++;
430 } else {
431 *out++ = SUBST_CHAR;
432 in++;
433 }
434 }
435
436 *out = '\0';
437 return 0;
438 }
439
440 static gint conv_jistoutf8(gchar *outbuf, gint outlen, const gchar *inbuf)
441 {
442 gchar *eucstr;
443
444 Xalloca(eucstr, outlen, return -1);
445
446 if (conv_jistoeuc(eucstr, outlen, inbuf) <0)
447 return -1;
448 if (conv_euctoutf8(outbuf, outlen, eucstr) < 0)
449 return -1;
450 return 0;
451 }
452
453 static gint conv_sjistoutf8(gchar *outbuf, gint outlen, const gchar *inbuf)
454 {
455 gchar *tmpstr;
456
457 tmpstr = conv_iconv_strdup(inbuf, CS_SHIFT_JIS, CS_UTF_8);
458 if (tmpstr) {
459 strncpy2(outbuf, tmpstr, outlen);
460 g_free(tmpstr);
461 return 0;
462 } else {
463 strncpy2(outbuf, inbuf, outlen);
464 return -1;
465 }
466 }
467
468 static gint conv_euctoutf8(gchar *outbuf, gint outlen, const gchar *inbuf)
469 {
470 static iconv_t cd = (iconv_t)-1;
471 static gboolean iconv_ok = TRUE;
472 gchar *tmpstr;
473
474 if (cd == (iconv_t)-1) {
475 if (!iconv_ok) {
476 strncpy2(outbuf, inbuf, outlen);
477 return -1;
478 }
479 cd = iconv_open(CS_UTF_8, CS_EUC_JP_MS);
480 if (cd == (iconv_t)-1) {
481 cd = iconv_open(CS_UTF_8, CS_EUC_JP);
482 if (cd == (iconv_t)-1) {
483 g_warning("conv_euctoutf8(): %s",
484 g_strerror(errno));
485 iconv_ok = FALSE;
486 strncpy2(outbuf, inbuf, outlen);
487 return -1;
488 }
489 }
490 }
491
492 tmpstr = conv_iconv_strdup_with_cd(inbuf, cd);
493 if (tmpstr) {
494 strncpy2(outbuf, tmpstr, outlen);
495 g_free(tmpstr);
496 return 0;
497 } else {
498 strncpy2(outbuf, inbuf, outlen);
499 return -1;
500 }
501 }
502
503 static gint conv_anytoutf8(gchar *outbuf, gint outlen, const gchar *inbuf)
504 {
505 gint r = -1;
506 switch (conv_guess_ja_encoding(inbuf)) {
507 case C_ISO_2022_JP:
508 r = conv_jistoutf8(outbuf, outlen, inbuf);
509 break;
510 case C_SHIFT_JIS:
511 r = conv_sjistoutf8(outbuf, outlen, inbuf);
512 break;
513 case C_EUC_JP:
514 r = conv_euctoutf8(outbuf, outlen, inbuf);
515 break;
516 default:
517 r = 0;
518 strncpy2(outbuf, inbuf, outlen);
519 break;
520 }
521
522 return r;
523 }
524
525 static gint conv_utf8toeuc(gchar *outbuf, gint outlen, const gchar *inbuf)
526 {
527 static iconv_t cd = (iconv_t)-1;
528 static gboolean iconv_ok = TRUE;
529 gchar *tmpstr;
530
531 if (cd == (iconv_t)-1) {
532 if (!iconv_ok) {
533 strncpy2(outbuf, inbuf, outlen);
534 return -1;
535 }
536 cd = iconv_open(CS_EUC_JP_MS, CS_UTF_8);
537 if (cd == (iconv_t)-1) {
538 cd = iconv_open(CS_EUC_JP, CS_UTF_8);
539 if (cd == (iconv_t)-1) {
540 g_warning("conv_utf8toeuc(): %s",
541 g_strerror(errno));
542 iconv_ok = FALSE;
543 strncpy2(outbuf, inbuf, outlen);
544 return -1;
545 }
546 }
547 }
548
549 tmpstr = conv_iconv_strdup_with_cd(inbuf, cd);
550 if (tmpstr) {
551 strncpy2(outbuf, tmpstr, outlen);
552 g_free(tmpstr);
553 return 0;
554 } else {
555 strncpy2(outbuf, inbuf, outlen);
556 return -1;
557 }
558 }
559
560 static gint conv_utf8tojis(gchar *outbuf, gint outlen, const gchar *inbuf)
561 {
562 gchar *eucstr;
563
564 Xalloca(eucstr, outlen, return -1);
565
566 if (conv_utf8toeuc(eucstr, outlen, inbuf) < 0)
567 return -1;
568 if (conv_euctojis(outbuf, outlen, eucstr) < 0)
569 return -1;
570
571 return 0;
572 }
573
574 static void conv_unreadable_8bit(gchar *str)
575 {
576 register guchar *p = str;
577
578 while (*p != '\0') {
579 /* convert CR+LF -> LF */
580 if (*p == '\r' && *(p + 1) == '\n')
581 memmove(p, p + 1, strlen(p));
582 else if (!IS_ASCII(*p)) *p = SUBST_CHAR;
583 p++;
584 }
585 }
586
587 static CharSet conv_guess_ja_encoding(const gchar *str)
588 {
589 const guchar *p = str;
590 CharSet guessed = C_US_ASCII;
591
592 while (*p != '\0') {
593 if (*p == ESC && (*(p + 1) == '$' || *(p + 1) == '(')) {
594 if (guessed == C_US_ASCII)
595 return C_ISO_2022_JP;
596 p += 2;
597 } else if (IS_ASCII(*p)) {
598 p++;
599 } else if (iseuckanji(*p) && iseuckanji(*(p + 1))) {
600 if (*p >= 0xfd && *p <= 0xfe)
601 return C_EUC_JP;
602 else if (guessed == C_SHIFT_JIS) {
603 if ((issjiskanji1(*p) &&
604 issjiskanji2(*(p + 1))) ||
605 issjishwkana(*p))
606 guessed = C_SHIFT_JIS;
607 else
608 guessed = C_EUC_JP;
609 } else
610 guessed = C_EUC_JP;
611 p += 2;
612 } else if (issjiskanji1(*p) && issjiskanji2(*(p + 1))) {
613 if (iseuchwkana1(*p) && iseuchwkana2(*(p + 1)))
614 guessed = C_SHIFT_JIS;
615 else
616 return C_SHIFT_JIS;
617 p += 2;
618 } else if (issjishwkana(*p)) {
619 guessed = C_SHIFT_JIS;
620 p++;
621 } else {
622 p++;
623 }
624 }
625
626 return guessed;
627 }
628
629 static gint conv_jistodisp(gchar *outbuf, gint outlen, const gchar *inbuf)
630 {
631 return conv_jistoutf8(outbuf, outlen, inbuf);
632 }
633
634 static gint conv_sjistodisp(gchar *outbuf, gint outlen, const gchar *inbuf)
635 {
636 return conv_sjistoutf8(outbuf, outlen, inbuf);
637 }
638
639 static gint conv_euctodisp(gchar *outbuf, gint outlen, const gchar *inbuf)
640 {
641 return conv_euctoutf8(outbuf, outlen, inbuf);
642 }
643
644 void conv_utf8todisp(gchar *outbuf, gint outlen, const gchar *inbuf)
645 {
646 if (g_utf8_validate(inbuf, -1, NULL) == TRUE)
647 strncpy2(outbuf, inbuf, outlen);
648 else
649 conv_ustodisp(outbuf, outlen, inbuf);
650 }
651
652 static gint conv_anytodisp(gchar *outbuf, gint outlen, const gchar *inbuf)
653 {
654 gint r = 0;
655 if (conv_anytoutf8(outbuf, outlen, inbuf) < 0)
656 r = -1;
657 if (g_utf8_validate(outbuf, -1, NULL) != TRUE)
658 conv_unreadable_8bit(outbuf);
659 return r;
660 }
661
662 static gint conv_ustodisp(gchar *outbuf, gint outlen, const gchar *inbuf)
663 {
664 strncpy2(outbuf, inbuf, outlen);
665 conv_unreadable_8bit(outbuf);
666
667 return 0;
668 }
669
670 void conv_localetodisp(gchar *outbuf, gint outlen, const gchar *inbuf)
671 {
672 gchar *tmpstr;
673
674 codeconv_set_strict(TRUE);
675 tmpstr = conv_iconv_strdup(inbuf, conv_get_locale_charset_str(),
676 CS_INTERNAL);
677 codeconv_set_strict(FALSE);
678 if (tmpstr && g_utf8_validate(tmpstr, -1, NULL)) {
679 strncpy2(outbuf, tmpstr, outlen);
680 g_free(tmpstr);
681 return;
682 } else if (tmpstr && !g_utf8_validate(tmpstr, -1, NULL)) {
683 g_free(tmpstr);
684 codeconv_set_strict(TRUE);
685 tmpstr = conv_iconv_strdup(inbuf,
686 conv_get_locale_charset_str_no_utf8(),
687 CS_INTERNAL);
688 codeconv_set_strict(FALSE);
689 }
690 if (tmpstr && g_utf8_validate(tmpstr, -1, NULL)) {
691 strncpy2(outbuf, tmpstr, outlen);
692 g_free(tmpstr);
693 return;
694 } else {
695 g_free(tmpstr);
696 conv_utf8todisp(outbuf, outlen, inbuf);
697 }
698 }
699
700 static gint conv_noconv(gchar *outbuf, gint outlen, const gchar *inbuf)
701 {
702 strncpy2(outbuf, inbuf, outlen);
703 return 0;
704 }
705
706 static const gchar *
707 conv_get_fallback_for_private_encoding(const gchar *encoding)
708 {
709 if (encoding && (encoding[0] == 'X' || encoding[0] == 'x') &&
710 encoding[1] == '-') {
711 if (!g_ascii_strcasecmp(encoding, CS_X_MACCYR))
712 return CS_MACCYR;
713 if (!g_ascii_strcasecmp(encoding, CS_X_GBK))
714 return CS_GBK;
715 }
716
717 return encoding;
718 }
719
720 CodeConverter *conv_code_converter_new(const gchar *src_charset)
721 {
722 CodeConverter *conv;
723
724 src_charset = conv_get_fallback_for_private_encoding(src_charset);
725
726 conv = g_new0(CodeConverter, 1);
727 conv->code_conv_func = conv_get_code_conv_func(src_charset, NULL);
728 conv->charset_str = g_strdup(src_charset);
729 conv->charset = conv_get_charset_from_str(src_charset);
730
731 return conv;
732 }
733
734 void conv_code_converter_destroy(CodeConverter *conv)
735 {
736 g_free(conv->charset_str);
737 g_free(conv);
738 }
739
740 gint conv_convert(CodeConverter *conv, gchar *outbuf, gint outlen,
741 const gchar *inbuf)
742 {
743 if (conv->code_conv_func != conv_noconv)
744 return conv->code_conv_func(outbuf, outlen, inbuf);
745 else {
746 gchar *str;
747
748 str = conv_iconv_strdup(inbuf, conv->charset_str, NULL);
749 if (!str)
750 return -1;
751 else {
752 strncpy2(outbuf, str, outlen);
753 g_free(str);
754 }
755 }
756
757 return 0;
758 }
759
760 gchar *conv_codeset_strdup(const gchar *inbuf,
761 const gchar *src_code, const gchar *dest_code)
762 {
763 gchar *buf;
764 size_t len;
765 CodeConvFunc conv_func;
766
767 if (!strcmp2(src_code, dest_code)) {
768 CharSet dest_charset = conv_get_charset_from_str(dest_code);
769 if (strict_mode && dest_charset == C_UTF_8) {
770 /* ensure valid UTF-8 if target is UTF-8 */
771 if (!g_utf8_validate(inbuf, -1, NULL)) {
772 return NULL;
773 }
774 }
775 /* otherwise, try for a lucky day */
776 return g_strdup(inbuf);
777 }
778
779 src_code = conv_get_fallback_for_private_encoding(src_code);
780 conv_func = conv_get_code_conv_func(src_code, dest_code);
781 if (conv_func == conv_ustodisp && strict_mode && !is_ascii_str(inbuf))
782 return NULL;
783
784 if (conv_func != conv_noconv) {
785 len = (strlen(inbuf) + 1) * 3;
786 buf = g_malloc(len);
787
788 if (conv_func(buf, len, inbuf) == 0 || !strict_mode)
789 return g_realloc(buf, strlen(buf) + 1);
790 else {
791 g_free(buf);
792 return NULL;
793 }
794 }
795
796 return conv_iconv_strdup(inbuf, src_code, dest_code);
797 }
798
799 static CodeConvFunc conv_get_code_conv_func(const gchar *src_charset_str,
800 const gchar *dest_charset_str)
801 {
802 CodeConvFunc code_conv = conv_noconv;
803 CharSet src_charset;
804 CharSet dest_charset;
805
806 if (!src_charset_str)
807 src_charset = conv_get_locale_charset();
808 else
809 src_charset = conv_get_charset_from_str(src_charset_str);
810
811 /* auto detection mode */
812 if (!src_charset_str && !dest_charset_str) {
813 if (conv_is_ja_locale())
814 return conv_anytodisp;
815 else
816 return conv_noconv;
817 }
818
819 dest_charset = conv_get_charset_from_str(dest_charset_str);
820
821 if (dest_charset == C_US_ASCII)
822 return conv_ustodisp;
823
824 switch (src_charset) {
825 case C_US_ASCII:
826 case C_ISO_8859_1:
827 case C_ISO_8859_2:
828 case C_ISO_8859_3:
829 case C_ISO_8859_4:
830 case C_ISO_8859_5:
831 case C_ISO_8859_6:
832 case C_ISO_8859_7:
833 case C_ISO_8859_8:
834 case C_ISO_8859_9:
835 case C_ISO_8859_10:
836 case C_ISO_8859_11:
837 case C_ISO_8859_13:
838 case C_ISO_8859_14:
839 case C_ISO_8859_15:
840 break;
841 case C_ISO_2022_JP:
842 case C_ISO_2022_JP_2:
843 case C_ISO_2022_JP_3:
844 if (dest_charset == C_AUTO)
845 code_conv = conv_jistodisp;
846 else if (dest_charset == C_EUC_JP)
847 code_conv = conv_jistoeuc;
848 else if (dest_charset == C_UTF_8)
849 code_conv = conv_jistoutf8;
850 break;
851 case C_SHIFT_JIS:
852 if (dest_charset == C_AUTO)
853 code_conv = conv_sjistodisp;
854 else if (dest_charset == C_EUC_JP)
855 code_conv = conv_sjistoeuc;
856 else if (dest_charset == C_UTF_8)
857 code_conv = conv_sjistoutf8;
858 break;
859 case C_EUC_JP:
860 if (dest_charset == C_AUTO)
861 code_conv = conv_euctodisp;
862 else if (dest_charset == C_ISO_2022_JP ||
863 dest_charset == C_ISO_2022_JP_2 ||
864 dest_charset == C_ISO_2022_JP_3)
865 code_conv = conv_euctojis;
866 else if (dest_charset == C_UTF_8)
867 code_conv = conv_euctoutf8;
868 break;
869 case C_UTF_8:
870 if (dest_charset == C_EUC_JP)
871 code_conv = conv_utf8toeuc;
872 else if (dest_charset == C_ISO_2022_JP ||
873 dest_charset == C_ISO_2022_JP_2 ||
874 dest_charset == C_ISO_2022_JP_3)
875 code_conv = conv_utf8tojis;
876 break;
877 default:
878 break;
879 }
880
881 return code_conv;
882 }
883
884 static gchar *conv_iconv_strdup(const gchar *inbuf,
885 const gchar *src_code, const gchar *dest_code)
886 {
887 iconv_t cd;
888 gchar *outbuf;
889
890 if (!src_code && !dest_code &&
891 g_utf8_validate(inbuf, -1, NULL))
892 return g_strdup(inbuf);
893
894 if (!src_code)
895 src_code = conv_get_outgoing_charset_str();
896 if (!dest_code)
897 dest_code = CS_INTERNAL;
898
899 /* don't convert if src and dest codeset are identical */
900 if (!strcasecmp(src_code, dest_code))
901 return g_strdup(inbuf);
902
903 /* don't convert if dest codeset is US-ASCII */
904 if (!strcasecmp(src_code, CS_US_ASCII))
905 return g_strdup(inbuf);
906
907 /* don't convert if dest codeset is US-ASCII */
908 if (!strcasecmp(dest_code, CS_US_ASCII))
909 return g_strdup(inbuf);
910
911 cd = iconv_open(dest_code, src_code);
912 if (cd == (iconv_t)-1)
913 return NULL;
914
915 outbuf = conv_iconv_strdup_with_cd(inbuf, cd);
916
917 iconv_close(cd);
918
919 return outbuf;
920 }
921
922 gchar *conv_iconv_strdup_with_cd(const gchar *inbuf, iconv_t cd)
923 {
924 const gchar *inbuf_p;
925 gchar *outbuf;
926 gchar *outbuf_p;
927 size_t in_size;
928 size_t in_left;
929 size_t out_size;
930 size_t out_left;
931 size_t n_conv;
932 size_t len;
933
934 inbuf_p = inbuf;
935 in_size = strlen(inbuf);
936 in_left = in_size;
937 out_size = (in_size + 1) * 2;
938 outbuf = g_malloc(out_size);
939 outbuf_p = outbuf;
940 out_left = out_size;
941
942 #define EXPAND_BUF() \
943 { \
944 len = outbuf_p - outbuf; \
945 out_size *= 2; \
946 outbuf = g_realloc(outbuf, out_size); \
947 outbuf_p = outbuf + len; \
948 out_left = out_size - len; \
949 }
950
951 while ((n_conv = iconv(cd, (ICONV_CONST gchar **)&inbuf_p, &in_left,
952 &outbuf_p, &out_left)) == (size_t)-1) {
953 if (EILSEQ == errno) {
954 if (strict_mode) {
955 g_free(outbuf);
956 return NULL;
957 }
958 //g_print("iconv(): at %d: %s\n", in_size - in_left, g_strerror(errno));
959 inbuf_p++;
960 in_left--;
961 if (out_left == 0) {
962 EXPAND_BUF();
963 }
964 *outbuf_p++ = SUBST_CHAR;
965 out_left--;
966 } else if (EINVAL == errno) {
967 break;
968 } else if (E2BIG == errno) {
969 EXPAND_BUF();
970 } else {
971 g_warning("conv_iconv_strdup(): %s",
972 g_strerror(errno));
973 break;
974 }
975 }
976
977 while ((n_conv = iconv(cd, NULL, NULL, &outbuf_p, &out_left)) ==
978 (size_t)-1) {
979 if (E2BIG == errno) {
980 EXPAND_BUF();
981 } else {
982 g_warning("conv_iconv_strdup(): %s",
983 g_strerror(errno));
984 break;
985 }
986 }
987
988 #undef EXPAND_BUF
989
990 len = outbuf_p - outbuf;
991 outbuf = g_realloc(outbuf, len + 1);
992 outbuf[len] = '\0';
993
994 return outbuf;
995 }
996
997 static const struct {
998 CharSet charset;
999 gchar *const name;
1000 } charsets[] = {
1001 {C_US_ASCII, CS_US_ASCII},
1002 {C_US_ASCII, CS_ANSI_X3_4_1968},
1003 {C_UTF_8, CS_UTF_8},
1004 {C_UTF_7, CS_UTF_7},
1005 {C_ISO_8859_1, CS_ISO_8859_1},
1006 {C_ISO_8859_2, CS_ISO_8859_2},
1007 {C_ISO_8859_3, CS_ISO_8859_3},
1008 {C_ISO_8859_4, CS_ISO_8859_4},
1009 {C_ISO_8859_5, CS_ISO_8859_5},
1010 {C_ISO_8859_6, CS_ISO_8859_6},
1011 {C_ISO_8859_7, CS_ISO_8859_7},
1012 {C_ISO_8859_8, CS_ISO_8859_8},
1013 {C_ISO_8859_9, CS_ISO_8859_9},
1014 {C_ISO_8859_10, CS_ISO_8859_10},
1015 {C_ISO_8859_11, CS_ISO_8859_11},
1016 {C_ISO_8859_13, CS_ISO_8859_13},
1017 {C_ISO_8859_14, CS_ISO_8859_14},
1018 {C_ISO_8859_15, CS_ISO_8859_15},
1019 {C_BALTIC, CS_BALTIC},
1020 {C_CP1250, CS_CP1250},
1021 {C_CP1251, CS_CP1251},
1022 {C_CP1252, CS_CP1252},
1023 {C_CP1253, CS_CP1253},
1024 {C_CP1254, CS_CP1254},
1025 {C_CP1255, CS_CP1255},
1026 {C_CP1256, CS_CP1256},
1027 {C_CP1257, CS_CP1257},
1028 {C_CP1258, CS_CP1258},
1029 {C_WINDOWS_1250, CS_WINDOWS_1250},
1030 {C_WINDOWS_1251, CS_WINDOWS_1251},
1031 {C_WINDOWS_1252, CS_WINDOWS_1252},
1032 {C_WINDOWS_1253, CS_WINDOWS_1253},
1033 {C_WINDOWS_1254, CS_WINDOWS_1254},
1034 {C_WINDOWS_1255, CS_WINDOWS_1255},
1035 {C_WINDOWS_1256, CS_WINDOWS_1256},
1036 {C_WINDOWS_1257, CS_WINDOWS_1257},
1037 {C_WINDOWS_1258, CS_WINDOWS_1258},
1038 {C_KOI8_R, CS_KOI8_R},
1039 {C_MACCYR, CS_MACCYR},
1040 {C_KOI8_T, CS_KOI8_T},
1041 {C_KOI8_U, CS_KOI8_U},
1042 {C_ISO_2022_JP, CS_ISO_2022_JP},
1043 {C_ISO_2022_JP_2, CS_ISO_2022_JP_2},
1044 {C_ISO_2022_JP_3, CS_ISO_2022_JP_3},
1045 {C_EUC_JP, CS_EUC_JP},
1046 {C_EUC_JP, CS_EUCJP},
1047 {C_EUC_JP_MS, CS_EUC_JP_MS},
1048 {C_SHIFT_JIS, CS_SHIFT_JIS},
1049 {C_SHIFT_JIS, CS_SHIFT__JIS},
1050 {C_SHIFT_JIS, CS_SJIS},
1051 {C_ISO_2022_KR, CS_ISO_2022_KR},
1052 {C_EUC_KR, CS_EUC_KR},
1053 {C_ISO_2022_CN, CS_ISO_2022_CN},
1054 {C_EUC_CN, CS_EUC_CN},
1055 {C_GB18030, CS_GB18030},
1056 {C_GB2312, CS_GB2312},
1057 {C_GBK, CS_GBK},
1058 {C_EUC_TW, CS_EUC_TW},
1059 {C_BIG5, CS_BIG5},
1060 {C_BIG5_HKSCS, CS_BIG5_HKSCS},
1061 {C_TIS_620, CS_TIS_620},
1062 {C_WINDOWS_874, CS_WINDOWS_874},
1063 {C_GEORGIAN_PS, CS_GEORGIAN_PS},
1064 {C_TCVN5712_1, CS_TCVN5712_1},
1065 };
1066
1067 static const struct {
1068 gchar *const locale;
1069 CharSet charset;
1070 CharSet out_charset;
1071 } locale_table[] = {
1072 {"ja_JP.eucJP" , C_EUC_JP , C_ISO_2022_JP},
1073 {"ja_JP.EUC-JP" , C_EUC_JP , C_ISO_2022_JP},
1074 {"ja_JP.EUC" , C_EUC_JP , C_ISO_2022_JP},
1075 {"ja_JP.ujis" , C_EUC_JP , C_ISO_2022_JP},
1076 {"ja_JP.SJIS" , C_SHIFT_JIS , C_ISO_2022_JP},
1077 {"ja_JP.JIS" , C_ISO_2022_JP , C_ISO_2022_JP},
1078 #ifdef G_OS_WIN32
1079 {"ja_JP" , C_SHIFT_JIS , C_ISO_2022_JP},
1080 #else
1081 {"ja_JP" , C_EUC_JP , C_ISO_2022_JP},
1082 #endif
1083 {"ko_KR.EUC-KR" , C_EUC_KR , C_EUC_KR},
1084 {"ko_KR" , C_EUC_KR , C_EUC_KR},
1085 {"zh_CN.GB18030" , C_GB18030 , C_GB18030},
1086 {"zh_CN.GB2312" , C_GB2312 , C_GB2312},
1087 {"zh_CN.GBK" , C_GBK , C_GBK},
1088 {"zh_CN" , C_GB18030 , C_GB18030},
1089 {"zh_HK" , C_BIG5_HKSCS , C_BIG5_HKSCS},
1090 {"zh_TW.eucTW" , C_EUC_TW , C_BIG5},
1091 {"zh_TW.EUC-TW" , C_EUC_TW , C_BIG5},
1092 {"zh_TW.Big5" , C_BIG5 , C_BIG5},
1093 {"zh_TW" , C_BIG5 , C_BIG5},
1094
1095 {"ru_RU.KOI8-R" , C_KOI8_R , C_KOI8_R},
1096 {"ru_RU.KOI8R" , C_KOI8_R , C_KOI8_R},
1097 {"ru_RU.CP1251" , C_WINDOWS_1251, C_KOI8_R},
1098 #ifdef G_OS_WIN32
1099 {"ru_RU" , C_WINDOWS_1251, C_KOI8_R},
1100 #else
1101 {"ru_RU" , C_ISO_8859_5 , C_KOI8_R},
1102 #endif
1103 {"tg_TJ" , C_KOI8_T , C_KOI8_T},
1104 {"ru_UA" , C_KOI8_U , C_KOI8_U},
1105 {"uk_UA.CP1251" , C_WINDOWS_1251, C_KOI8_U},
1106 {"uk_UA" , C_KOI8_U , C_KOI8_U},
1107
1108 {"be_BY" , C_WINDOWS_1251, C_WINDOWS_1251},
1109 {"bg_BG" , C_WINDOWS_1251, C_WINDOWS_1251},
1110
1111 {"yi_US" , C_WINDOWS_1255, C_WINDOWS_1255},
1112
1113 {"af_ZA" , C_ISO_8859_1 , C_ISO_8859_1},
1114 {"br_FR" , C_ISO_8859_1 , C_ISO_8859_1},
1115 {"ca_ES" , C_ISO_8859_1 , C_ISO_8859_1},
1116 {"da_DK" , C_ISO_8859_1 , C_ISO_8859_1},
1117 {"de_AT" , C_ISO_8859_1 , C_ISO_8859_1},
1118 {"de_BE" , C_ISO_8859_1 , C_ISO_8859_1},
1119 {"de_CH" , C_ISO_8859_1 , C_ISO_8859_1},
1120 {"de_DE" , C_ISO_8859_1 , C_ISO_8859_1},
1121 {"de_LU" , C_ISO_8859_1 , C_ISO_8859_1},
1122 {"en_AU" , C_ISO_8859_1 , C_ISO_8859_1},
1123 {"en_BW" , C_ISO_8859_1 , C_ISO_8859_1},
1124 {"en_CA" , C_ISO_8859_1 , C_ISO_8859_1},
1125 {"en_DK" , C_ISO_8859_1 , C_ISO_8859_1},
1126 {"en_GB" , C_ISO_8859_1 , C_ISO_8859_1},
1127 {"en_HK" , C_ISO_8859_1 , C_ISO_8859_1},
1128 {"en_IE" , C_ISO_8859_1 , C_ISO_8859_1},
1129 {"en_NZ" , C_ISO_8859_1 , C_ISO_8859_1},
1130 {"en_PH" , C_ISO_8859_1 , C_ISO_8859_1},
1131 {"en_SG" , C_ISO_8859_1 , C_ISO_8859_1},
1132 {"en_US" , C_ISO_8859_1 , C_ISO_8859_1},
1133 {"en_ZA" , C_ISO_8859_1 , C_ISO_8859_1},
1134 {"en_ZW" , C_ISO_8859_1 , C_ISO_8859_1},
1135 {"es_AR" , C_ISO_8859_1 , C_ISO_8859_1},
1136 {"es_BO" , C_ISO_8859_1 , C_ISO_8859_1},
1137 {"es_CL" , C_ISO_8859_1 , C_ISO_8859_1},
1138 {"es_CO" , C_ISO_8859_1 , C_ISO_8859_1},
1139 {"es_CR" , C_ISO_8859_1 , C_ISO_8859_1},
1140 {"es_DO" , C_ISO_8859_1 , C_ISO_8859_1},
1141 {"es_EC" , C_ISO_8859_1 , C_ISO_8859_1},
1142 {"es_ES" , C_ISO_8859_1 , C_ISO_8859_1},
1143 {"es_GT" , C_ISO_8859_1 , C_ISO_8859_1},
1144 {"es_HN" , C_ISO_8859_1 , C_ISO_8859_1},
1145 {"es_MX" , C_ISO_8859_1 , C_ISO_8859_1},
1146 {"es_NI" , C_ISO_8859_1 , C_ISO_8859_1},
1147 {"es_PA" , C_ISO_8859_1 , C_ISO_8859_1},
1148 {"es_PE" , C_ISO_8859_1 , C_ISO_8859_1},
1149 {"es_PR" , C_ISO_8859_1 , C_ISO_8859_1},
1150 {"es_PY" , C_ISO_8859_1 , C_ISO_8859_1},
1151 {"es_SV" , C_ISO_8859_1 , C_ISO_8859_1},
1152 {"es_US" , C_ISO_8859_1 , C_ISO_8859_1},
1153 {"es_UY" , C_ISO_8859_1 , C_ISO_8859_1},
1154 {"es_VE" , C_ISO_8859_1 , C_ISO_8859_1},
1155 {"et_EE" , C_ISO_8859_1 , C_ISO_8859_1},
1156 {"eu_ES" , C_ISO_8859_1 , C_ISO_8859_1},
1157 {"fi_FI" , C_ISO_8859_1 , C_ISO_8859_1},
1158 {"fo_FO" , C_ISO_8859_1 , C_ISO_8859_1},
1159 {"fr_BE" , C_ISO_8859_1 , C_ISO_8859_1},
1160 {"fr_CA" , C_ISO_8859_1 , C_ISO_8859_1},
1161 {"fr_CH" , C_ISO_8859_1 , C_ISO_8859_1},
1162 {"fr_FR" , C_ISO_8859_1 , C_ISO_8859_1},
1163 {"fr_LU" , C_ISO_8859_1 , C_ISO_8859_1},
1164 {"ga_IE" , C_ISO_8859_1 , C_ISO_8859_1},
1165 {"gl_ES" , C_ISO_8859_1 , C_ISO_8859_1},
1166 {"gv_GB" , C_ISO_8859_1 , C_ISO_8859_1},
1167 {"id_ID" , C_ISO_8859_1 , C_ISO_8859_1},
1168 {"is_IS" , C_ISO_8859_1 , C_ISO_8859_1},
1169 {"it_CH" , C_ISO_8859_1 , C_ISO_8859_1},
1170 {"it_IT" , C_ISO_8859_1 , C_ISO_8859_1},
1171 {"kl_GL" , C_ISO_8859_1 , C_ISO_8859_1},
1172 {"kw_GB" , C_ISO_8859_1 , C_ISO_8859_1},
1173 {"ms_MY" , C_ISO_8859_1 , C_ISO_8859_1},
1174 {"nl_BE" , C_ISO_8859_1 , C_ISO_8859_1},
1175 {"nl_NL" , C_ISO_8859_1 , C_ISO_8859_1},
1176 {"nb_NO" , C_ISO_8859_1 , C_ISO_8859_1},
1177 {"nn_NO" , C_ISO_8859_1 , C_ISO_8859_1},
1178 {"no_NO" , C_ISO_8859_1 , C_ISO_8859_1},
1179 {"oc_FR" , C_ISO_8859_1 , C_ISO_8859_1},
1180 {"pt_BR" , C_ISO_8859_1 , C_ISO_8859_1},
1181 {"pt_PT" , C_ISO_8859_1 , C_ISO_8859_1},
1182 {"sq_AL" , C_ISO_8859_1 , C_ISO_8859_1},
1183 {"sv_FI" , C_ISO_8859_1 , C_ISO_8859_1},
1184 {"sv_SE" , C_ISO_8859_1 , C_ISO_8859_1},
1185 {"tl_PH" , C_ISO_8859_1 , C_ISO_8859_1},
1186 {"uz_UZ" , C_ISO_8859_1 , C_ISO_8859_1},
1187 {"wa_BE" , C_ISO_8859_1 , C_ISO_8859_1},
1188
1189 {"bs_BA" , C_ISO_8859_2 , C_ISO_8859_2},
1190 {"cs_CZ" , C_ISO_8859_2 , C_ISO_8859_2},
1191 {"hr_HR" , C_ISO_8859_2 , C_ISO_8859_2},
1192 {"hu_HU" , C_ISO_8859_2 , C_ISO_8859_2},
1193 {"pl_PL" , C_ISO_8859_2 , C_ISO_8859_2},
1194 {"ro_RO" , C_ISO_8859_2 , C_ISO_8859_2},
1195 {"sk_SK" , C_ISO_8859_2 , C_ISO_8859_2},
1196 {"sl_SI" , C_ISO_8859_2 , C_ISO_8859_2},
1197
1198 {"sr_YU@cyrillic" , C_ISO_8859_5 , C_ISO_8859_5},
1199 {"sr_YU" , C_ISO_8859_2 , C_ISO_8859_2},
1200
1201 {"mt_MT" , C_ISO_8859_3 , C_ISO_8859_3},
1202
1203 {"lt_LT.iso88594" , C_ISO_8859_4 , C_ISO_8859_4},
1204 {"lt_LT.ISO8859-4" , C_ISO_8859_4 , C_ISO_8859_4},
1205 {"lt_LT.ISO_8859-4" , C_ISO_8859_4 , C_ISO_8859_4},
1206 {"lt_LT" , C_ISO_8859_13 , C_ISO_8859_13},
1207
1208 {"mk_MK" , C_ISO_8859_5 , C_ISO_8859_5},
1209
1210 {"ar_AE" , C_ISO_8859_6 , C_ISO_8859_6},
1211 {"ar_BH" , C_ISO_8859_6 , C_ISO_8859_6},
1212 {"ar_DZ" , C_ISO_8859_6 , C_ISO_8859_6},
1213 {"ar_EG" , C_ISO_8859_6 , C_ISO_8859_6},
1214 {"ar_IQ" , C_ISO_8859_6 , C_ISO_8859_6},
1215 {"ar_JO" , C_ISO_8859_6 , C_ISO_8859_6},
1216 {"ar_KW" , C_ISO_8859_6 , C_ISO_8859_6},
1217 {"ar_LB" , C_ISO_8859_6 , C_ISO_8859_6},
1218 {"ar_LY" , C_ISO_8859_6 , C_ISO_8859_6},
1219 {"ar_MA" , C_ISO_8859_6 , C_ISO_8859_6},
1220 {"ar_OM" , C_ISO_8859_6 , C_ISO_8859_6},
1221 {"ar_QA" , C_ISO_8859_6 , C_ISO_8859_6},
1222 {"ar_SA" , C_ISO_8859_6 , C_ISO_8859_6},
1223 {"ar_SD" , C_ISO_8859_6 , C_ISO_8859_6},
1224 {"ar_SY" , C_ISO_8859_6 , C_ISO_8859_6},
1225 {"ar_TN" , C_ISO_8859_6 , C_ISO_8859_6},
1226 {"ar_YE" , C_ISO_8859_6 , C_ISO_8859_6},
1227
1228 {"el_GR" , C_ISO_8859_7 , C_ISO_8859_7},
1229 {"he_IL" , C_ISO_8859_8 , C_ISO_8859_8},
1230 {"iw_IL" , C_ISO_8859_8 , C_ISO_8859_8},
1231 {"tr_TR" , C_ISO_8859_9 , C_ISO_8859_9},
1232
1233 {"lv_LV" , C_ISO_8859_13 , C_ISO_8859_13},
1234 {"mi_NZ" , C_ISO_8859_13 , C_ISO_8859_13},
1235
1236 {"cy_GB" , C_ISO_8859_14 , C_ISO_8859_14},
1237
1238 {"ar_IN" , C_UTF_8 , C_UTF_8},
1239 {"en_IN" , C_UTF_8 , C_UTF_8},
1240 {"se_NO" , C_UTF_8 , C_UTF_8},
1241 {"ta_IN" , C_UTF_8 , C_UTF_8},
1242 {"te_IN" , C_UTF_8 , C_UTF_8},
1243 {"ur_PK" , C_UTF_8 , C_UTF_8},
1244
1245 {"th_TH" , C_TIS_620 , C_TIS_620},
1246 /* {"th_TH" , C_WINDOWS_874}, */
1247 /* {"th_TH" , C_ISO_8859_11}, */
1248
1249 {"ka_GE" , C_GEORGIAN_PS , C_GEORGIAN_PS},
1250 {"vi_VN.TCVN" , C_TCVN5712_1 , C_TCVN5712_1},
1251
1252 {"C" , C_US_ASCII , C_US_ASCII},
1253 {"POSIX" , C_US_ASCII , C_US_ASCII},
1254 {"ANSI_X3.4-1968" , C_US_ASCII , C_US_ASCII},
1255 };
1256
1257 static GHashTable *conv_get_charset_to_str_table(void)
1258 {
1259 static GHashTable *table;
1260 gint i;
1261
1262 if (table)
1263 return table;
1264
1265 table = g_hash_table_new(NULL, g_direct_equal);
1266
1267 for (i = 0; i < sizeof(charsets) / sizeof(charsets[0]); i++) {
1268 if (g_hash_table_lookup(table, GUINT_TO_POINTER(charsets[i].charset))
1269 == NULL) {
1270 g_hash_table_insert
1271 (table, GUINT_TO_POINTER(charsets[i].charset),
1272 charsets[i].name);
1273 }
1274 }
1275
1276 return table;
1277 }
1278
1279 static GHashTable *conv_get_charset_from_str_table(void)
1280 {
1281 static GHashTable *table;
1282 gint i;
1283
1284 if (table)
1285 return table;
1286
1287 table = g_hash_table_new(str_case_hash, str_case_equal);
1288
1289 for (i = 0; i < sizeof(charsets) / sizeof(charsets[0]); i++) {
1290 g_hash_table_insert(table, charsets[i].name,
1291 GUINT_TO_POINTER(charsets[i].charset));
1292 }
1293
1294 return table;
1295 }
1296
1297 const gchar *conv_get_charset_str(CharSet charset)
1298 {
1299 GHashTable *table;
1300
1301 table = conv_get_charset_to_str_table();
1302 return g_hash_table_lookup(table, GUINT_TO_POINTER(charset));
1303 }
1304
1305 CharSet conv_get_charset_from_str(const gchar *charset)
1306 {
1307 GHashTable *table;
1308
1309 if (!charset) return C_AUTO;
1310
1311 table = conv_get_charset_from_str_table();
1312 return GPOINTER_TO_UINT(g_hash_table_lookup(table, charset));
1313 }
1314
1315 static CharSet conv_get_locale_charset(void)
1316 {
1317 static CharSet cur_charset = -1;
1318 const gchar *cur_locale;
1319 const gchar *p;
1320 gint i;
1321
1322 if (cur_charset != -1)
1323 return cur_charset;
1324
1325 cur_locale = conv_get_current_locale();
1326 if (!cur_locale) {
1327 cur_charset = C_US_ASCII;
1328 return cur_charset;
1329 }
1330
1331 if (strcasestr(cur_locale, "UTF-8") ||
1332 strcasestr(cur_locale, "utf8")) {
1333 cur_charset = C_UTF_8;
1334 return cur_charset;
1335 }
1336
1337 if ((p = strcasestr(cur_locale, "@euro")) && p[5] == '\0') {
1338 cur_charset = C_ISO_8859_15;
1339 return cur_charset;
1340 }
1341
1342 for (i = 0; i < sizeof(locale_table) / sizeof(locale_table[0]); i++) {
1343 const gchar *p;
1344
1345 /* "ja_JP.EUC" matches with "ja_JP.eucJP", "ja_JP.EUC" and
1346 "ja_JP". "ja_JP" matches with "ja_JP.xxxx" and "ja" */
1347 if (!g_ascii_strncasecmp(cur_locale, locale_table[i].locale,
1348 strlen(locale_table[i].locale))) {
1349 cur_charset = locale_table[i].charset;
1350 return cur_charset;
1351 } else if ((p = strchr(locale_table[i].locale, '_')) &&
1352 !strchr(p + 1, '.')) {
1353 if (strlen(cur_locale) == 2 &&
1354 !g_ascii_strncasecmp(cur_locale, locale_table[i].locale, 2)) {
1355 cur_charset = locale_table[i].charset;
1356 return cur_charset;
1357 }
1358 }
1359 }
1360
1361 cur_charset = C_AUTO;
1362 return cur_charset;
1363 }
1364
1365 static CharSet conv_get_locale_charset_no_utf8(void)
1366 {
1367 static CharSet cur_charset = -1;
1368 const gchar *cur_locale;
1369 const gchar *p;
1370 gint i;
1371
1372 if (prefs_common.broken_are_utf8) {
1373 cur_charset = C_UTF_8;
1374 return cur_charset;
1375 }
1376
1377 cur_locale = conv_get_current_locale();
1378 if (!cur_locale) {
1379 cur_charset = C_US_ASCII;
1380 return cur_charset;
1381 }
1382
1383 if (strcasestr(cur_locale, "UTF-8") ||
1384 strcasestr(cur_locale, "utf8")) {
1385 cur_charset = C_UTF_8;
1386 return cur_charset;
1387 }
1388
1389 if ((p = strcasestr(cur_locale, "@euro")) && p[5] == '\0') {
1390 cur_charset = C_ISO_8859_15;
1391 return cur_charset;
1392 }
1393
1394 for (i = 0; i < sizeof(locale_table) / sizeof(locale_table[0]); i++) {
1395 const gchar *p;
1396
1397 /* "ja_JP.EUC" matches with "ja_JP.eucJP", "ja_JP.EUC" and
1398 "ja_JP". "ja_JP" matches with "ja_JP.xxxx" and "ja" */
1399 if (!g_ascii_strncasecmp(cur_locale, locale_table[i].locale,
1400 strlen(locale_table[i].locale))) {
1401 cur_charset = locale_table[i].charset;
1402 return cur_charset;
1403 } else if ((p = strchr(locale_table[i].locale, '_')) &&
1404 !strchr(p + 1, '.')) {
1405 if (strlen(cur_locale) == 2 &&
1406 !g_ascii_strncasecmp(cur_locale, locale_table[i].locale, 2)) {
1407 cur_charset = locale_table[i].charset;
1408 return cur_charset;
1409 }
1410 }
1411 }
1412
1413 cur_charset = C_AUTO;
1414 return cur_charset;
1415 }
1416
1417 const gchar *conv_get_locale_charset_str(void)
1418 {
1419 static const gchar *codeset = NULL;
1420
1421 if (!codeset)
1422 codeset = conv_get_charset_str(conv_get_locale_charset());
1423
1424 return codeset ? codeset : CS_INTERNAL;
1425 }
1426
1427 const gchar *conv_get_locale_charset_str_no_utf8(void)
1428 {
1429 static const gchar *codeset = NULL;
1430
1431 if (!codeset)
1432 codeset = conv_get_charset_str(conv_get_locale_charset_no_utf8());
1433
1434 return codeset ? codeset : CS_INTERNAL;
1435 }
1436
1437 static CharSet conv_get_outgoing_charset(void)
1438 {
1439 static CharSet out_charset = -1;
1440 const gchar *cur_locale;
1441 const gchar *p;
1442 gint i;
1443
1444 if (out_charset != -1)
1445 return out_charset;
1446
1447 cur_locale = conv_get_current_locale();
1448 if (!cur_locale) {
1449 out_charset = C_AUTO;
1450 return out_charset;
1451 }
1452
1453 if (strcasestr(cur_locale, "UTF-8") ||
1454 strcasestr(cur_locale, "utf8")) {
1455 out_charset = C_UTF_8;
1456 return out_charset;
1457 }
1458
1459 if ((p = strcasestr(cur_locale, "@euro")) && p[5] == '\0') {
1460 out_charset = C_ISO_8859_15;
1461 return out_charset;
1462 }
1463
1464 for (i = 0; i < sizeof(locale_table) / sizeof(locale_table[0]); i++) {
1465 const gchar *p;
1466
1467 if (!g_ascii_strncasecmp(cur_locale, locale_table[i].locale,
1468 strlen(locale_table[i].locale))) {
1469 out_charset = locale_table[i].out_charset;
1470 break;
1471 } else if ((p = strchr(locale_table[i].locale, '_')) &&
1472 !strchr(p + 1, '.')) {
1473 if (strlen(cur_locale) == 2 &&
1474 !g_ascii_strncasecmp(cur_locale, locale_table[i].locale, 2)) {
1475 out_charset = locale_table[i].out_charset;
1476 break;
1477 }
1478 }
1479 }
1480
1481 return out_charset;
1482 }
1483
1484 const gchar *conv_get_outgoing_charset_str(void)
1485 {
1486 CharSet out_charset;
1487 const gchar *str;
1488
1489 out_charset = conv_get_outgoing_charset();
1490 str = conv_get_charset_str(out_charset);
1491
1492 return str ? str : CS_UTF_8;
1493 }
1494
1495 const gchar *conv_get_current_locale(void)
1496 {
1497 const gchar *cur_locale;
1498
1499 #ifdef G_OS_WIN32
1500 cur_locale = g_win32_getlocale();
1501 #else
1502 cur_locale = g_getenv("LC_ALL");
1503 if (!cur_locale) cur_locale = g_getenv("LC_CTYPE");
1504 if (!cur_locale) cur_locale = g_getenv("LANG");
1505 if (!cur_locale) cur_locale = setlocale(LC_CTYPE, NULL);
1506 #endif /* G_OS_WIN32 */
1507
1508 debug_print("current locale: %s\n",
1509 cur_locale ? cur_locale : "(none)");
1510
1511 return cur_locale;
1512 }
1513
1514 static gboolean conv_is_ja_locale(void)
1515 {
1516 static gint is_ja_locale = -1;
1517 const gchar *cur_locale;
1518
1519 if (is_ja_locale != -1)
1520 return is_ja_locale != 0;
1521
1522 is_ja_locale = 0;
1523 cur_locale = conv_get_current_locale();
1524 if (cur_locale) {
1525 if (g_ascii_strncasecmp(cur_locale, "ja", 2) == 0)
1526 is_ja_locale = 1;
1527 }
1528
1529 return is_ja_locale != 0;
1530 }
1531
1532 gchar *conv_unmime_header(const gchar *str, const gchar *default_encoding,
1533 gboolean addr_field)
1534 {
1535 gchar buf[BUFFSIZE];
1536
1537 if (is_ascii_str(str))
1538 return unmime_header(str, addr_field);
1539
1540 if (default_encoding) {
1541 gchar *utf8_buf;
1542
1543 utf8_buf = conv_codeset_strdup
1544 (str, default_encoding, CS_INTERNAL);
1545 if (utf8_buf) {
1546 gchar *decoded_str;
1547
1548 decoded_str = unmime_header(utf8_buf, addr_field);
1549 g_free(utf8_buf);
1550 return decoded_str;
1551 }
1552 }
1553
1554 if (conv_is_ja_locale())
1555 conv_anytodisp(buf, sizeof(buf), str);
1556 else
1557 conv_localetodisp(buf, sizeof(buf), str);
1558
1559 return unmime_header(buf, addr_field);
1560 }
1561
1562 #define MAX_LINELEN 76
1563 #define MAX_HARD_LINELEN 996
1564 #define MIMESEP_BEGIN "=?"
1565 #define MIMESEP_END "?="
1566
1567 #define LBREAK_IF_REQUIRED(cond, is_plain_text) \
1568 { \
1569 if (len - (destp - (guchar *)dest) < MAX_LINELEN + 2) { \
1570 *destp = '\0'; \
1571 return; \
1572 } \
1573 \
1574 if ((cond) && *srcp) { \
1575 if (destp > (guchar *)dest && left < MAX_LINELEN - 1) { \
1576 if (isspace(*(destp - 1))) \
1577 destp--; \
1578 else if (is_plain_text && isspace(*srcp)) \
1579 srcp++; \
1580 if (*srcp) { \
1581 *destp++ = '\n'; \
1582 *destp++ = ' '; \
1583 left = MAX_LINELEN - 1; \
1584 } \
1585 } else if (destp == (guchar *)dest && left < 7) { \
1586 if (is_plain_text && isspace(*srcp)) \
1587 srcp++; \
1588 if (*srcp) { \
1589 *destp++ = '\n'; \
1590 *destp++ = ' '; \
1591 left = MAX_LINELEN - 1; \
1592 } \
1593 } \
1594 } \
1595 }
1596
1597 #define B64LEN(len) ((len) / 3 * 4 + ((len) % 3 ? 4 : 0))
1598
1599 void conv_encode_header_full(gchar *dest, gint len, const gchar *src,
1600 gint header_len, gboolean addr_field,
1601 const gchar *out_encoding_)
1602 {
1603 const gchar *cur_encoding;
1604 const gchar *out_encoding;
1605 gint mimestr_len;
1606 gchar *mimesep_enc;
1607 gint left;
1608 const guchar *srcp = src;
1609 guchar *destp = dest;
1610 gboolean use_base64;
1611
1612 cm_return_if_fail(g_utf8_validate(src, -1, NULL) == TRUE);
1613 cm_return_if_fail(destp != NULL);
1614
1615 if (MB_CUR_MAX > 1) {
1616 use_base64 = TRUE;
1617 mimesep_enc = "?B?";
1618 } else {
1619 use_base64 = FALSE;
1620 mimesep_enc = "?Q?";
1621 }
1622
1623 cur_encoding = CS_INTERNAL;
1624
1625 if (out_encoding_)
1626 out_encoding = out_encoding_;
1627 else
1628 out_encoding = conv_get_outgoing_charset_str();
1629
1630 if (!strcmp(out_encoding, CS_US_ASCII))
1631 out_encoding = CS_ISO_8859_1;
1632
1633 mimestr_len = strlen(MIMESEP_BEGIN) + strlen(out_encoding) +
1634 strlen(mimesep_enc) + strlen(MIMESEP_END);
1635
1636 left = MAX_LINELEN - header_len;
1637
1638 while (*srcp) {
1639 LBREAK_IF_REQUIRED(left <= 0, TRUE);
1640
1641 while (isspace(*srcp)) {
1642 *destp++ = *srcp++;
1643 left--;
1644 LBREAK_IF_REQUIRED(left <= 0, TRUE);
1645 }
1646
1647 /* output as it is if the next word is ASCII string */
1648 if (!is_next_nonascii(srcp)) {
1649 gint word_len;
1650
1651 word_len = get_next_word_len(srcp);
1652 LBREAK_IF_REQUIRED(left < word_len, TRUE);
1653 while (word_len > 0) {
1654 LBREAK_IF_REQUIRED(left + (MAX_HARD_LINELEN - MAX_LINELEN) <= 0, TRUE)
1655 *destp++ = *srcp++;
1656 left--;
1657 word_len--;
1658 }
1659
1660 continue;
1661 }
1662
1663 /* don't include parentheses and quotes in encoded strings */
1664 if (addr_field && (*srcp == '(' || *srcp == ')' || *srcp == '"')) {
1665 LBREAK_IF_REQUIRED(left < 2, FALSE);
1666 *destp++ = *srcp++;
1667 left--;
1668 }
1669
1670 while (1) {
1671 gint mb_len = 0;
1672 gint cur_len = 0;
1673 gchar *part_str;
1674 gchar *out_str;
1675 gchar *enc_str;
1676 const guchar *p = srcp;
1677 gint out_str_len;
1678 gint out_enc_str_len;
1679 gint mime_block_len;
1680 gboolean cont = FALSE;
1681
1682 while (*p != '\0') {
1683 if (isspace(*p) && !is_next_nonascii(p + 1))
1684 break;
1685 /* don't include parentheses in encoded
1686 strings */
1687 if (addr_field && (*p == '(' || *p == ')' || *p == '"'))
1688 break;
1689
1690 mb_len = g_utf8_skip[*p];
1691
1692 Xstrndup_a(part_str, srcp, cur_len + mb_len, );
1693 out_str = conv_codeset_strdup
1694 (part_str, cur_encoding, out_encoding);
1695 if (!out_str) {
1696 if (strict_mode) {
1697 *dest = '\0';
1698 return;
1699 } else {
1700 g_warning("conv_encode_header_full(): code conversion failed");
1701 conv_unreadable_8bit(part_str);
1702 out_str = g_strdup(part_str);
1703 }
1704 }
1705 out_str_len = strlen(out_str);
1706
1707 if (use_base64)
1708 out_enc_str_len = B64LEN(out_str_len);
1709 else
1710 out_enc_str_len =
1711 qp_get_q_encoding_len(out_str);
1712
1713 g_free(out_str);
1714
1715 if (mimestr_len + out_enc_str_len <= left) {
1716 cur_len += mb_len;
1717 p += mb_len;
1718 } else if (cur_len == 0) {
1719 left = 0;
1720 LBREAK_IF_REQUIRED(1, FALSE);
1721 continue;
1722 } else {
1723 cont = TRUE;
1724 break;
1725 }
1726 }
1727
1728 if (cur_len > 0) {
1729 Xstrndup_a(part_str, srcp, cur_len, );
1730 out_str = conv_codeset_strdup
1731 (part_str, cur_encoding, out_encoding);
1732 if (!out_str) {
1733 g_warning("conv_encode_header_full(): code conversion failed");
1734 conv_unreadable_8bit(part_str);
1735 out_str = g_strdup(part_str);
1736 }
1737 out_str_len = strlen(out_str);
1738
1739 if (use_base64)
1740 out_enc_str_len = B64LEN(out_str_len);
1741 else
1742 out_enc_str_len =
1743 qp_get_q_encoding_len(out_str);
1744
1745 if (use_base64)
1746 enc_str = g_base64_encode(out_str, out_str_len);
1747 else {
1748 Xalloca(enc_str, out_enc_str_len + 1, );
1749 qp_q_encode(enc_str, out_str);
1750 }
1751
1752 g_free(out_str);
1753
1754 /* output MIME-encoded string block */
1755 mime_block_len = mimestr_len + strlen(enc_str);
1756 g_snprintf(destp, mime_block_len + 1,
1757 MIMESEP_BEGIN "%s%s%s" MIMESEP_END,
1758 out_encoding, mimesep_enc, enc_str);
1759
1760 if (use_base64)
1761 g_free(enc_str);
1762
1763 destp += mime_block_len;
1764 srcp += cur_len;
1765
1766 left -= mime_block_len;
1767 }
1768
1769 LBREAK_IF_REQUIRED(cont, FALSE);
1770
1771 if (cur_len == 0)
1772 break;
1773 }
1774 }
1775
1776 *destp = '\0';
1777 }
1778
1779 void conv_encode_header(gchar *dest, gint len, const gchar *src,
1780 gint header_len, gboolean addr_field)
1781 {
1782 conv_encode_header_full(dest,len,src,header_len,addr_field,NULL);
1783 }
1784
1785 #undef LBREAK_IF_REQUIRED
1786 #undef B64LEN
1787
1788 gchar *conv_filename_from_utf8(const gchar *utf8_file)
1789 {
1790 gchar *fs_file;
1791 GError *error = NULL;
1792
1793 fs_file = g_filename_from_utf8(utf8_file, -1, NULL, NULL, &error);
1794 if (error) {
1795 debug_print("failed to convert encoding of file name: %s\n",
1796 error->message);
1797 g_error_free(error);
1798 }
1799 if (!fs_file)
1800 fs_file = g_strdup(utf8_file);
1801
1802 return fs_file;
1803 }
1804
1805 gchar *conv_filename_to_utf8(const gchar *fs_file)
1806 {
1807 gchar *utf8_file = NULL;
1808 GError *error = NULL;
1809
1810 utf8_file = g_filename_to_utf8(fs_file, -1, NULL, NULL, &error);
1811 if (error) {
1812 g_warning("failed to convert encoding of file name: %s",
1813 error->message);
1814 g_error_free(error);
1815 }
1816
1817 if (!utf8_file || !g_utf8_validate(utf8_file, -1, NULL)) {
1818 g_free(utf8_file);
1819 utf8_file = g_strdup(fs_file);
1820 conv_unreadable_8bit(utf8_file);
1821 }
1822
1823 return utf8_file;
1824 }