NeoMutt  2022-04-29-249-gaae397
Teaching an old dog new tricks
DOXYGEN
charset.c
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1
29#include "config.h"
30#include <ctype.h>
31#include <errno.h>
32#include <iconv.h>
33#include <langinfo.h>
34#include <limits.h>
35#include <stdbool.h>
36#include <stdio.h>
37#include <string.h>
38#include "config/lib.h"
39#include "core/lib.h"
40#include "charset.h"
41#include "lib.h"
42#include "memory.h"
43#include "queue.h"
44#include "regex3.h"
45#include "string2.h"
46#ifdef ENABLE_NLS
47#include <libintl.h>
48#endif
49
50#ifndef EILSEQ
51#define EILSEQ EINVAL
52#endif
53
57wchar_t ReplacementChar = '?';
58
62bool CharsetIsUtf8 = false;
63
69struct Lookup
70{
72 struct Regex regex;
74 TAILQ_ENTRY(Lookup) entries;
75};
76TAILQ_HEAD(LookupList, Lookup);
77
78static struct LookupList Lookups = TAILQ_HEAD_INITIALIZER(Lookups);
79
84{
85 const char *key;
86 const char *pref;
87};
88
99const struct MimeNames PreferredMimeNames[] = {
100 // clang-format off
101 { "ansi_x3.4-1968", "us-ascii" },
102 { "iso-ir-6", "us-ascii" },
103 { "iso_646.irv:1991", "us-ascii" },
104 { "ascii", "us-ascii" },
105 { "iso646-us", "us-ascii" },
106 { "us", "us-ascii" },
107 { "ibm367", "us-ascii" },
108 { "cp367", "us-ascii" },
109 { "csASCII", "us-ascii" },
110
111 { "csISO2022KR", "iso-2022-kr" },
112 { "csEUCKR", "euc-kr" },
113 { "csISO2022JP", "iso-2022-jp" },
114 { "csISO2022JP2", "iso-2022-jp-2" },
115
116 { "ISO_8859-1:1987", "iso-8859-1" },
117 { "iso-ir-100", "iso-8859-1" },
118 { "iso_8859-1", "iso-8859-1" },
119 { "latin1", "iso-8859-1" },
120 { "l1", "iso-8859-1" },
121 { "IBM819", "iso-8859-1" },
122 { "CP819", "iso-8859-1" },
123 { "csISOLatin1", "iso-8859-1" },
124
125 { "ISO_8859-2:1987", "iso-8859-2" },
126 { "iso-ir-101", "iso-8859-2" },
127 { "iso_8859-2", "iso-8859-2" },
128 { "latin2", "iso-8859-2" },
129 { "l2", "iso-8859-2" },
130 { "csISOLatin2", "iso-8859-2" },
131
132 { "ISO_8859-3:1988", "iso-8859-3" },
133 { "iso-ir-109", "iso-8859-3" },
134 { "ISO_8859-3", "iso-8859-3" },
135 { "latin3", "iso-8859-3" },
136 { "l3", "iso-8859-3" },
137 { "csISOLatin3", "iso-8859-3" },
138
139 { "ISO_8859-4:1988", "iso-8859-4" },
140 { "iso-ir-110", "iso-8859-4" },
141 { "ISO_8859-4", "iso-8859-4" },
142 { "latin4", "iso-8859-4" },
143 { "l4", "iso-8859-4" },
144 { "csISOLatin4", "iso-8859-4" },
145
146 { "ISO_8859-6:1987", "iso-8859-6" },
147 { "iso-ir-127", "iso-8859-6" },
148 { "iso_8859-6", "iso-8859-6" },
149 { "ECMA-114", "iso-8859-6" },
150 { "ASMO-708", "iso-8859-6" },
151 { "arabic", "iso-8859-6" },
152 { "csISOLatinArabic", "iso-8859-6" },
153
154 { "ISO_8859-7:1987", "iso-8859-7" },
155 { "iso-ir-126", "iso-8859-7" },
156 { "ISO_8859-7", "iso-8859-7" },
157 { "ELOT_928", "iso-8859-7" },
158 { "ECMA-118", "iso-8859-7" },
159 { "greek", "iso-8859-7" },
160 { "greek8", "iso-8859-7" },
161 { "csISOLatinGreek", "iso-8859-7" },
162
163 { "ISO_8859-8:1988", "iso-8859-8" },
164 { "iso-ir-138", "iso-8859-8" },
165 { "ISO_8859-8", "iso-8859-8" },
166 { "hebrew", "iso-8859-8" },
167 { "csISOLatinHebrew", "iso-8859-8" },
168
169 { "ISO_8859-5:1988", "iso-8859-5" },
170 { "iso-ir-144", "iso-8859-5" },
171 { "ISO_8859-5", "iso-8859-5" },
172 { "cyrillic", "iso-8859-5" },
173 { "csISOLatinCyrillic", "iso-8859-5" },
174
175 { "ISO_8859-9:1989", "iso-8859-9" },
176 { "iso-ir-148", "iso-8859-9" },
177 { "ISO_8859-9", "iso-8859-9" },
178 { "latin5", "iso-8859-9" }, /* this is not a bug */
179 { "l5", "iso-8859-9" },
180 { "csISOLatin5", "iso-8859-9" },
181
182 { "ISO_8859-10:1992", "iso-8859-10" },
183 { "iso-ir-157", "iso-8859-10" },
184 { "latin6", "iso-8859-10" }, /* this is not a bug */
185 { "l6", "iso-8859-10" },
186 { "csISOLatin6", "iso-8859-10" },
187
188 { "csKOI8r", "koi8-r" },
189
190 { "MS_Kanji", "Shift_JIS" }, /* Note the underscore! */
191 { "csShiftJis", "Shift_JIS" },
192
193 { "Extended_UNIX_Code_Packed_Format_for_Japanese",
194 "euc-jp" },
195 { "csEUCPkdFmtJapanese", "euc-jp" },
196
197 { "csGB2312", "gb2312" },
198 { "csbig5", "big5" },
199
200 /* End of official brain damage.
201 * What follows has been taken from glibc's localedata files. */
202
203 { "iso_8859-13", "iso-8859-13" },
204 { "iso-ir-179", "iso-8859-13" },
205 { "latin7", "iso-8859-13" }, /* this is not a bug */
206 { "l7", "iso-8859-13" },
207
208 { "iso_8859-14", "iso-8859-14" },
209 { "latin8", "iso-8859-14" }, /* this is not a bug */
210 { "l8", "iso-8859-14" },
211
212 { "iso_8859-15", "iso-8859-15" },
213 { "latin9", "iso-8859-15" }, /* this is not a bug */
214
215 /* Suggested by Ionel Mugurel Ciobica <tgakic@sg10.chem.tue.nl> */
216 { "latin0", "iso-8859-15" }, /* this is not a bug */
217
218 { "iso_8859-16", "iso-8859-16" },
219 { "latin10", "iso-8859-16" }, /* this is not a bug */
220
221 { "646", "us-ascii" },
222
223 /* http://www.sun.com/software/white-papers/wp-unicode/ */
224
225 { "eucJP", "euc-jp" },
226 { "PCK", "Shift_JIS" },
227 { "ko_KR-euc", "euc-kr" },
228 { "zh_TW-big5", "big5" },
229
230 /* seems to be common on some systems */
231
232 { "sjis", "Shift_JIS" },
233 { "euc-jp-ms", "eucJP-ms" },
234
235 /* If you happen to encounter system-specific brain-damage with respect to
236 * character set naming, please add it above this comment, and submit a patch
237 * to <neomutt-devel@neomutt.org> */
238
239 { NULL, NULL },
240 // clang-format on
241};
242
247static struct Lookup *lookup_new(void)
248{
249 return mutt_mem_calloc(1, sizeof(struct Lookup));
250}
251
256static void lookup_free(struct Lookup **ptr)
257{
258 if (!ptr || !*ptr)
259 return;
260
261 struct Lookup *l = *ptr;
262 FREE(&l->replacement);
263 FREE(&l->regex.pattern);
264 if (l->regex.regex)
265 regfree(l->regex.regex);
266 FREE(&l->regex.regex);
267 FREE(&l->regex);
268
269 FREE(ptr);
270}
271
281static const char *lookup_charset(enum LookupType type, const char *cs)
282{
283 if (!cs)
284 return NULL;
285
286 struct Lookup *l = NULL;
287
288 TAILQ_FOREACH(l, &Lookups, entries)
289 {
290 if (l->type != type)
291 continue;
292 if (mutt_regex_match(&l->regex, cs))
293 return l->replacement;
294 }
295 return NULL;
296}
297
308{
309 if (!ps)
310 return -1;
311
312 char *u = *ps;
313 const size_t ulen = mutt_str_len(u);
314 if (ulen == 0)
315 return 0;
316
317 const struct Slist *const c_assumed_charset = cs_subset_slist(NeoMutt->sub, "assumed_charset");
318 const char *const c_charset = cs_subset_string(NeoMutt->sub, "charset");
319 const struct ListNode *np = NULL;
320 STAILQ_FOREACH(np, &c_assumed_charset->head, entries)
321 {
322 char const *c = np->data;
323 size_t n = mutt_str_len(c);
324 char *fromcode = mutt_mem_malloc(n + 1);
325 mutt_str_copy(fromcode, c, n + 1);
326 char *s = mutt_strn_dup(u, ulen);
327 int m = mutt_ch_convert_string(&s, fromcode, c_charset, MUTT_ICONV_NO_FLAGS);
328 FREE(&fromcode);
329 if (m == 0)
330 {
331 FREE(ps);
332 *ps = s;
333 return 0;
334 }
335 FREE(&s);
336 }
338 c_charset, MUTT_ICONV_HOOK_FROM);
339 return -1;
340}
341
351void mutt_ch_canonical_charset(char *buf, size_t buflen, const char *name)
352{
353 if (!buf || !name)
354 return;
355
356 char in[1024], scratch[1024 + 10];
357
358 mutt_str_copy(in, name, sizeof(in));
359 char *ext = strchr(in, '/');
360 if (ext)
361 *ext++ = '\0';
362
363 if (mutt_istr_equal(in, "utf-8") || mutt_istr_equal(in, "utf8"))
364 {
365 mutt_str_copy(buf, "utf-8", buflen);
366 goto out;
367 }
368
369 /* catch some common iso-8859-something misspellings */
370 size_t plen;
371 if ((plen = mutt_istr_startswith(in, "8859")) && (in[plen] != '-'))
372 snprintf(scratch, sizeof(scratch), "iso-8859-%s", in + plen);
373 else if ((plen = mutt_istr_startswith(in, "8859-")))
374 snprintf(scratch, sizeof(scratch), "iso-8859-%s", in + plen);
375 else if ((plen = mutt_istr_startswith(in, "iso8859")) && (in[plen] != '-'))
376 snprintf(scratch, sizeof(scratch), "iso_8859-%s", in + plen);
377 else if ((plen = mutt_istr_startswith(in, "iso8859-")))
378 snprintf(scratch, sizeof(scratch), "iso_8859-%s", in + plen);
379 else
380 mutt_str_copy(scratch, in, sizeof(scratch));
381
382 for (size_t i = 0; PreferredMimeNames[i].key; i++)
383 {
384 if (mutt_istr_equal(scratch, PreferredMimeNames[i].key))
385 {
386 mutt_str_copy(buf, PreferredMimeNames[i].pref, buflen);
387 goto out;
388 }
389 }
390
391 mutt_str_copy(buf, scratch, buflen);
392
393 /* for cosmetics' sake, transform to lowercase. */
394 for (char *p = buf; *p; p++)
395 *p = tolower(*p);
396
397out:
398 if (ext && *ext)
399 {
400 mutt_str_cat(buf, buflen, "/");
401 mutt_str_cat(buf, buflen, ext);
402 }
403}
404
417bool mutt_ch_chscmp(const char *cs1, const char *cs2)
418{
419 if (!cs1 || !cs2)
420 return false;
421
422 char buf[256] = { 0 };
423
424 mutt_ch_canonical_charset(buf, sizeof(buf), cs1);
425
426 int len1 = mutt_str_len(buf);
427 int len2 = mutt_str_len(cs2);
428
429 return mutt_istrn_equal(((len1 > len2) ? buf : cs2),
430 ((len1 > len2) ? cs2 : buf), MIN(len1, len2));
431}
432
440{
441 static char fcharset[128];
442 const char *c = NULL;
443 const struct Slist *const c_assumed_charset = cs_subset_slist(NeoMutt->sub, "assumed_charset");
444
445 if (c_assumed_charset && (c_assumed_charset->count > 0))
446 c = STAILQ_FIRST(&c_assumed_charset->head)->data;
447 else
448 c = "us-ascii";
449
450 mutt_str_copy(fcharset, c, sizeof(fcharset));
451 return fcharset;
452}
453
462{
463 char buf[1024] = { 0 };
464
465 mutt_ch_canonical_charset(buf, sizeof(buf), nl_langinfo(CODESET));
466
467 if (buf[0] != '\0')
468 return mutt_str_dup(buf);
469
470 return mutt_str_dup("iso-8859-1");
471}
472
484bool mutt_ch_lookup_add(enum LookupType type, const char *pat,
485 const char *replace, struct Buffer *err)
486{
487 if (!pat || !replace)
488 return false;
489
490 regex_t *rx = mutt_mem_calloc(1, sizeof(regex_t));
491 int rc = REG_COMP(rx, pat, REG_ICASE);
492 if (rc != 0)
493 {
494 regerror(rc, rx, err->data, err->dsize);
495 FREE(&rx);
496 return false;
497 }
498
499 struct Lookup *l = lookup_new();
500 l->type = type;
501 l->replacement = mutt_str_dup(replace);
502 l->regex.pattern = mutt_str_dup(pat);
503 l->regex.regex = rx;
504 l->regex.pat_not = false;
505
506 TAILQ_INSERT_TAIL(&Lookups, l, entries);
507
508 return true;
509}
510
517{
518 struct Lookup *l = NULL;
519 struct Lookup *tmp = NULL;
520
521 TAILQ_FOREACH_SAFE(l, &Lookups, entries, tmp)
522 {
523 TAILQ_REMOVE(&Lookups, l, entries);
524 lookup_free(&l);
525 }
526}
527
537const char *mutt_ch_charset_lookup(const char *chs)
538{
540}
541
564iconv_t mutt_ch_iconv_open(const char *tocode, const char *fromcode, uint8_t flags)
565{
566 char tocode1[128];
567 char fromcode1[128];
568 const char *tocode2 = NULL, *fromcode2 = NULL;
569 const char *tmp = NULL;
570
571 iconv_t cd;
572
573 /* transform to MIME preferred charset names */
574 mutt_ch_canonical_charset(tocode1, sizeof(tocode1), tocode);
575 mutt_ch_canonical_charset(fromcode1, sizeof(fromcode1), fromcode);
576
577 /* maybe apply charset-hooks and recanonicalise fromcode,
578 * but only when caller asked us to sanitize a potentially wrong
579 * charset name incoming from the wild exterior. */
580 if (flags & MUTT_ICONV_HOOK_FROM)
581 {
582 tmp = mutt_ch_charset_lookup(fromcode1);
583 if (tmp)
584 mutt_ch_canonical_charset(fromcode1, sizeof(fromcode1), tmp);
585 }
586
587 /* always apply iconv-hooks to suit system's iconv tastes */
588 tocode2 = mutt_ch_iconv_lookup(tocode1);
589 tocode2 = tocode2 ? tocode2 : tocode1;
590 fromcode2 = mutt_ch_iconv_lookup(fromcode1);
591 fromcode2 = fromcode2 ? fromcode2 : fromcode1;
592
593 /* call system iconv with names it appreciates */
594 cd = iconv_open(tocode2, fromcode2);
595 if (cd != (iconv_t) -1)
596 return cd;
597
598 return (iconv_t) -1;
599}
600
617size_t mutt_ch_iconv(iconv_t cd, const char **inbuf, size_t *inbytesleft,
618 char **outbuf, size_t *outbytesleft, const char **inrepls,
619 const char *outrepl, int *iconverrno)
620{
621 size_t rc = 0;
622 const char *ib = *inbuf;
623 size_t ibl = *inbytesleft;
624 char *ob = *outbuf;
625 size_t obl = *outbytesleft;
626
627 while (true)
628 {
629 errno = 0;
630 const size_t ret1 = iconv(cd, (ICONV_CONST char **) &ib, &ibl, &ob, &obl);
631 if (ret1 != (size_t) -1)
632 rc += ret1;
633 if (iconverrno)
634 *iconverrno = errno;
635
636 if (ibl && obl && (errno == EILSEQ))
637 {
638 if (inrepls)
639 {
640 /* Try replacing the input */
641 const char **t = NULL;
642 for (t = inrepls; *t; t++)
643 {
644 const char *ib1 = *t;
645 size_t ibl1 = strlen(*t);
646 char *ob1 = ob;
647 size_t obl1 = obl;
648 iconv(cd, (ICONV_CONST char **) &ib1, &ibl1, &ob1, &obl1);
649 if (ibl1 == 0)
650 {
651 ib++;
652 ibl--;
653 ob = ob1;
654 obl = obl1;
655 rc++;
656 break;
657 }
658 }
659 if (*t)
660 continue;
661 }
662 /* Replace the output */
663 if (!outrepl)
664 outrepl = "?";
665 iconv(cd, NULL, NULL, &ob, &obl);
666 if (obl)
667 {
668 int n = strlen(outrepl);
669 if (n > obl)
670 {
671 outrepl = "?";
672 n = 1;
673 }
674 memcpy(ob, outrepl, n);
675 ib++;
676 ibl--;
677 ob += n;
678 obl -= n;
679 rc++;
680 iconv(cd, NULL, NULL, NULL, NULL); /* for good measure */
681 continue;
682 }
683 }
684 *inbuf = ib;
685 *inbytesleft = ibl;
686 *outbuf = ob;
687 *outbytesleft = obl;
688 return rc;
689 }
690}
691
701const char *mutt_ch_iconv_lookup(const char *chs)
702{
704}
705
716int mutt_ch_check(const char *s, size_t slen, const char *from, const char *to)
717{
718 if (!s || !from || !to)
719 return -1;
720
721 int rc = 0;
722 iconv_t cd = mutt_ch_iconv_open(to, from, MUTT_ICONV_NO_FLAGS);
723 if (cd == (iconv_t) -1)
724 return -1;
725
726 size_t outlen = MB_LEN_MAX * slen;
727 char *out = mutt_mem_malloc(outlen + 1);
728 char *saved_out = out;
729
730 const size_t convlen = iconv(cd, (ICONV_CONST char **) &s, &slen, &out, &outlen);
731 if (convlen == (size_t) -1)
732 rc = errno;
733
734 FREE(&saved_out);
735 iconv_close(cd);
736 return rc;
737}
738
752int mutt_ch_convert_string(char **ps, const char *from, const char *to, uint8_t flags)
753{
754 if (!ps)
755 return -1;
756
757 char *s = *ps;
758
759 if (!s || (*s == '\0'))
760 return 0;
761
762 if (!to || !from)
763 return -1;
764
765 const char *repls[] = { "\357\277\275", "?", 0 };
766 int rc = 0;
767
768 iconv_t cd = mutt_ch_iconv_open(to, from, flags);
769 if (cd == (iconv_t) -1)
770 return -1;
771
772 const char **inrepls = NULL;
773 const char *outrepl = NULL;
774
775 if (mutt_ch_is_utf8(to))
776 outrepl = "\357\277\275";
777 else if (mutt_ch_is_utf8(from))
778 inrepls = repls;
779 else
780 outrepl = "?";
781
782 const char *ib = s;
783 size_t ibl = strlen(s);
784 if (ibl >= (SIZE_MAX / MB_LEN_MAX))
785 {
786 iconv_close(cd);
787 return -1;
788 }
789 size_t obl = MB_LEN_MAX * ibl;
790 char *buf = mutt_mem_malloc(obl + 1);
791 char *ob = buf;
792
793 mutt_ch_iconv(cd, &ib, &ibl, &ob, &obl, inrepls, outrepl, &rc);
794 iconv(cd, 0, 0, &ob, &obl);
795 iconv_close(cd);
796
797 *ob = '\0';
798
799 FREE(ps);
800 *ps = buf;
801
802 mutt_str_adjust(ps);
803 return rc;
804}
805
817bool mutt_ch_check_charset(const char *cs, bool strict)
818{
819 if (!cs)
820 return false;
821
822 if (mutt_ch_is_utf8(cs))
823 return true;
824
825 if (!strict)
826 {
827 for (int i = 0; PreferredMimeNames[i].key; i++)
828 {
829 if (mutt_istr_equal(PreferredMimeNames[i].key, cs) ||
831 {
832 return true;
833 }
834 }
835 }
836
837 iconv_t cd = mutt_ch_iconv_open(cs, cs, MUTT_ICONV_NO_FLAGS);
838 if (cd != (iconv_t) (-1))
839 {
840 iconv_close(cd);
841 return true;
842 }
843
844 return false;
845}
846
857struct FgetConv *mutt_ch_fgetconv_open(FILE *fp, const char *from, const char *to, uint8_t flags)
858{
859 struct FgetConv *fc = NULL;
860 iconv_t cd = (iconv_t) -1;
861
862 if (from && to)
863 cd = mutt_ch_iconv_open(to, from, flags);
864
865 if (cd != (iconv_t) -1)
866 {
867 static const char *repls[] = { "\357\277\275", "?", 0 };
868
869 fc = mutt_mem_malloc(sizeof(struct FgetConv));
870 fc->p = fc->bufo;
871 fc->ob = fc->bufo;
872 fc->ib = fc->bufi;
873 fc->ibl = 0;
874 fc->inrepls = mutt_ch_is_utf8(to) ? repls : repls + 1;
875 }
876 else
877 fc = mutt_mem_malloc(sizeof(struct FgetConvNot));
878 fc->fp = fp;
879 fc->cd = cd;
880 return fc;
881}
882
888{
889 if (!fc || !*fc)
890 return;
891
892 if ((*fc)->cd != (iconv_t) -1)
893 iconv_close((*fc)->cd);
894 FREE(fc);
895}
896
908{
909 if (!fc)
910 return EOF;
911 if (fc->cd == (iconv_t) -1)
912 return fgetc(fc->fp);
913 if (!fc->p)
914 return EOF;
915 if (fc->p < fc->ob)
916 return (unsigned char) *(fc->p)++;
917
918 /* Try to convert some more */
919 fc->p = fc->bufo;
920 fc->ob = fc->bufo;
921 if (fc->ibl)
922 {
923 size_t obl = sizeof(fc->bufo);
924 iconv(fc->cd, (ICONV_CONST char **) &fc->ib, &fc->ibl, &fc->ob, &obl);
925 if (fc->p < fc->ob)
926 return (unsigned char) *(fc->p)++;
927 }
928
929 /* If we trusted iconv a bit more, we would at this point
930 * ask why it had stopped converting ... */
931
932 /* Try to read some more */
933 if ((fc->ibl == sizeof(fc->bufi)) ||
934 (fc->ibl && (fc->ib + fc->ibl < fc->bufi + sizeof(fc->bufi))))
935 {
936 fc->p = 0;
937 return EOF;
938 }
939 if (fc->ibl)
940 memcpy(fc->bufi, fc->ib, fc->ibl);
941 fc->ib = fc->bufi;
942 fc->ibl += fread(fc->ib + fc->ibl, 1, sizeof(fc->bufi) - fc->ibl, fc->fp);
943
944 /* Try harder this time to convert some */
945 if (fc->ibl)
946 {
947 size_t obl = sizeof(fc->bufo);
948 mutt_ch_iconv(fc->cd, (const char **) &fc->ib, &fc->ibl, &fc->ob, &obl,
949 fc->inrepls, 0, NULL);
950 if (fc->p < fc->ob)
951 return (unsigned char) *(fc->p)++;
952 }
953
954 /* Either the file has finished or one of the buffers is too small */
955 fc->p = 0;
956 return EOF;
957}
958
969char *mutt_ch_fgetconvs(char *buf, size_t buflen, struct FgetConv *fc)
970{
971 if (!buf)
972 return NULL;
973
974 size_t r;
975 for (r = 0; (r + 1) < buflen;)
976 {
977 const int c = mutt_ch_fgetconv(fc);
978 if (c == EOF)
979 break;
980 buf[r++] = (char) c;
981 if (c == '\n')
982 break;
983 }
984 buf[r] = '\0';
985
986 if (r > 0)
987 return buf;
988
989 return NULL;
990}
991
1002void mutt_ch_set_charset(const char *charset)
1003{
1004 char buf[256] = { 0 };
1005
1006 mutt_ch_canonical_charset(buf, sizeof(buf), charset);
1007
1008 if (mutt_ch_is_utf8(buf))
1009 {
1010 CharsetIsUtf8 = true;
1011 ReplacementChar = 0xfffd; /* replacement character */
1012 }
1013 else
1014 {
1015 CharsetIsUtf8 = false;
1016 ReplacementChar = '?';
1017 }
1018
1019#if defined(HAVE_BIND_TEXTDOMAIN_CODESET) && defined(ENABLE_NLS)
1020 bind_textdomain_codeset(PACKAGE, buf);
1021#endif
1022}
1023
1035char *mutt_ch_choose(const char *fromcode, const struct Slist *charsets,
1036 const char *u, size_t ulen, char **d, size_t *dlen)
1037{
1038 if (!fromcode || !charsets)
1039 return NULL;
1040
1041 char *e = NULL, *tocode = NULL;
1042 size_t elen = 0, bestn = 0;
1043
1044 const struct ListNode *np = NULL;
1045 STAILQ_FOREACH(np, &charsets->head, entries)
1046 {
1047 char *t = mutt_str_dup(np->data);
1048 if (!t)
1049 continue;
1050
1051 size_t n = mutt_str_len(t);
1052 char *s = mutt_strn_dup(u, ulen);
1053 const int rc = d ? mutt_ch_convert_string(&s, fromcode, t, MUTT_ICONV_NO_FLAGS) :
1054 mutt_ch_check(s, ulen, fromcode, t);
1055 if (rc)
1056 {
1057 FREE(&t);
1058 FREE(&s);
1059 continue;
1060 }
1061 size_t slen = mutt_str_len(s);
1062
1063 if (!tocode || (n < bestn))
1064 {
1065 bestn = n;
1066 FREE(&tocode);
1067 tocode = t;
1068 if (d)
1069 {
1070 FREE(&e);
1071 e = s;
1072 }
1073 else
1074 FREE(&s);
1075 elen = slen;
1076 }
1077 else
1078 {
1079 FREE(&t);
1080 FREE(&s);
1081 }
1082 }
1083 if (tocode)
1084 {
1085 if (d)
1086 *d = e;
1087 if (dlen)
1088 *dlen = elen;
1089
1090 char canonical_buf[1024] = { 0 };
1091 mutt_ch_canonical_charset(canonical_buf, sizeof(canonical_buf), tocode);
1092 mutt_str_replace(&tocode, canonical_buf);
1093 }
1094 return tocode;
1095}
const char * cs_subset_string(const struct ConfigSubset *sub, const char *name)
Get a string config item by name.
Definition: helpers.c:317
const struct Slist * cs_subset_slist(const struct ConfigSubset *sub, const char *name)
Get a string-list config item by name.
Definition: helpers.c:268
Convenience wrapper for the config headers.
Convenience wrapper for the core headers.
static char * chs
Definition: gnupgparse.c:73
void * mutt_mem_calloc(size_t nmemb, size_t size)
Allocate zeroed memory on the heap.
Definition: memory.c:50
void * mutt_mem_malloc(size_t size)
Allocate memory on the heap.
Definition: memory.c:90
Memory management wrappers.
#define FREE(x)
Definition: memory.h:43
#define MIN(a, b)
Definition: memory.h:31
bool mutt_ch_check_charset(const char *cs, bool strict)
Does iconv understand a character set?
Definition: charset.c:817
void mutt_ch_fgetconv_close(struct FgetConv **fc)
Close an fgetconv handle.
Definition: charset.c:887
size_t mutt_ch_iconv(iconv_t cd, const char **inbuf, size_t *inbytesleft, char **outbuf, size_t *outbytesleft, const char **inrepls, const char *outrepl, int *iconverrno)
Change the encoding of a string.
Definition: charset.c:617
void mutt_ch_lookup_remove(void)
Remove all the character set lookups.
Definition: charset.c:516
char * mutt_ch_choose(const char *fromcode, const struct Slist *charsets, const char *u, size_t ulen, char **d, size_t *dlen)
Figure the best charset to encode a string.
Definition: charset.c:1035
static struct LookupList Lookups
Definition: charset.c:78
char * mutt_ch_get_langinfo_charset(void)
Get the user's choice of character set.
Definition: charset.c:461
const struct MimeNames PreferredMimeNames[]
Lookup table of preferred charsets.
Definition: charset.c:99
bool mutt_ch_lookup_add(enum LookupType type, const char *pat, const char *replace, struct Buffer *err)
Add a new character set lookup.
Definition: charset.c:484
void mutt_ch_canonical_charset(char *buf, size_t buflen, const char *name)
Canonicalise the charset of a string.
Definition: charset.c:351
const char * mutt_ch_iconv_lookup(const char *chs)
Look for a replacement character set.
Definition: charset.c:701
TAILQ_HEAD(LookupList, Lookup)
int mutt_ch_convert_string(char **ps, const char *from, const char *to, uint8_t flags)
Convert a string between encodings.
Definition: charset.c:752
void mutt_ch_set_charset(const char *charset)
Update the records for a new character set.
Definition: charset.c:1002
bool CharsetIsUtf8
Is the user's current character set utf-8?
Definition: charset.c:62
static const char * lookup_charset(enum LookupType type, const char *cs)
Look for a preferred character set name.
Definition: charset.c:281
int mutt_ch_check(const char *s, size_t slen, const char *from, const char *to)
Check whether a string can be converted between encodings.
Definition: charset.c:716
const char * mutt_ch_charset_lookup(const char *chs)
Look for a replacement character set.
Definition: charset.c:537
char * mutt_ch_get_default_charset(void)
Get the default character set.
Definition: charset.c:439
static struct Lookup * lookup_new(void)
Create a new Lookup.
Definition: charset.c:247
int mutt_ch_fgetconv(struct FgetConv *fc)
Convert a file's character set.
Definition: charset.c:907
static void lookup_free(struct Lookup **ptr)
Free a Lookup.
Definition: charset.c:256
wchar_t ReplacementChar
When a Unicode character can't be displayed, use this instead.
Definition: charset.c:57
#define EILSEQ
Definition: charset.c:51
int mutt_ch_convert_nonmime_string(char **ps)
Try to convert a string using a list of character sets.
Definition: charset.c:307
struct FgetConv * mutt_ch_fgetconv_open(FILE *fp, const char *from, const char *to, uint8_t flags)
Prepare a file for charset conversion.
Definition: charset.c:857
char * mutt_ch_fgetconvs(char *buf, size_t buflen, struct FgetConv *fc)
Convert a file's charset into a string buffer.
Definition: charset.c:969
bool mutt_ch_chscmp(const char *cs1, const char *cs2)
Are the names of two character sets equivalent?
Definition: charset.c:417
iconv_t mutt_ch_iconv_open(const char *tocode, const char *fromcode, uint8_t flags)
Set up iconv for conversions.
Definition: charset.c:564
Conversion between different character encodings.
#define MUTT_ICONV_HOOK_FROM
apply charset-hooks to fromcode
Definition: charset.h:72
#define mutt_ch_is_utf8(str)
Definition: charset.h:95
LookupType
Types of character set lookups.
Definition: charset.h:66
@ MUTT_LOOKUP_ICONV
Character set conversion.
Definition: charset.h:68
@ MUTT_LOOKUP_CHARSET
Alias for another character set.
Definition: charset.h:67
#define MUTT_ICONV_NO_FLAGS
No flags are set.
Definition: charset.h:71
bool mutt_regex_match(const struct Regex *regex, const char *str)
Shorthand to mutt_regex_capture()
Definition: regex.c:631
char * mutt_strn_dup(const char *begin, size_t len)
Duplicate a sub-string.
Definition: string.c:451
bool mutt_istr_equal(const char *a, const char *b)
Compare two strings, ignoring case.
Definition: string.c:819
char * mutt_str_dup(const char *str)
Copy a string, safely.
Definition: string.c:250
void mutt_str_adjust(char **ptr)
Shrink-to-fit a string.
Definition: string.c:370
size_t mutt_str_len(const char *a)
Calculate the length of a string, safely.
Definition: string.c:567
size_t mutt_str_copy(char *dest, const char *src, size_t dsize)
Copy a string into a buffer (guaranteeing NUL-termination)
Definition: string.c:652
size_t mutt_istr_startswith(const char *str, const char *prefix)
Check whether a string starts with a prefix, ignoring case.
Definition: string.c:239
bool mutt_istrn_equal(const char *a, const char *b, size_t num)
Check for equality of two strings ignoring case (to a maximum), safely.
Definition: string.c:524
char * mutt_str_replace(char **p, const char *s)
Replace one string with another.
Definition: string.c:326
char * mutt_str_cat(char *buf, size_t buflen, const char *s)
Concatenate two strings.
Definition: string.c:265
static size_t plen
Length of cached packet.
Definition: pgppacket.c:39
#define TAILQ_FOREACH(var, head, field)
Definition: queue.h:725
#define TAILQ_FOREACH_SAFE(var, head, field, tvar)
Definition: queue.h:735
#define STAILQ_FIRST(head)
Definition: queue.h:350
#define TAILQ_INSERT_TAIL(head, elm, field)
Definition: queue.h:809
#define STAILQ_FOREACH(var, head, field)
Definition: queue.h:352
#define TAILQ_REMOVE(head, elm, field)
Definition: queue.h:841
#define TAILQ_HEAD_INITIALIZER(head)
Definition: queue.h:637
#define TAILQ_ENTRY(type)
Definition: queue.h:640
Manage regular expressions.
#define REG_COMP(preg, regex, cflags)
Compile a regular expression.
Definition: regex3.h:53
Key value store.
String manipulation functions.
String manipulation buffer.
Definition: buffer.h:34
size_t dsize
Length of data.
Definition: buffer.h:37
char * data
Pointer to data.
Definition: buffer.h:35
A dummy converter.
Definition: charset.h:57
Cursor for converting a file's encoding.
Definition: charset.h:41
char bufi[512]
Definition: charset.h:44
iconv_t cd
Definition: charset.h:43
char bufo[512]
Definition: charset.h:45
size_t ibl
Definition: charset.h:49
FILE * fp
Definition: charset.h:42
char * p
Definition: charset.h:46
const char ** inrepls
Definition: charset.h:50
char * ib
Definition: charset.h:48
char * ob
Definition: charset.h:47
A List node for strings.
Definition: list.h:35
char * data
String.
Definition: list.h:36
Regex to String lookup table.
Definition: charset.c:70
char * replacement
Alternative charset to use.
Definition: charset.c:73
enum LookupType type
Lookup type.
Definition: charset.c:71
struct Regex regex
Regular expression.
Definition: charset.c:72
MIME name lookup entry.
Definition: charset.c:84
const char * key
Definition: charset.c:85
const char * pref
Definition: charset.c:86
Container for Accounts, Notifications.
Definition: neomutt.h:37
struct ConfigSubset * sub
Inherited config items.
Definition: neomutt.h:39
Cached regular expression.
Definition: regex3.h:89
char * pattern
printable version
Definition: regex3.h:90
bool pat_not
do not match
Definition: regex3.h:92
regex_t * regex
compiled expression
Definition: regex3.h:91
String list.
Definition: slist.h:47
struct ListHead head
List containing values.
Definition: slist.h:48
size_t count
Number of values in list.
Definition: slist.h:49