/*
* Copyright notice from original mutt:
* Copyright (C) 1999-2000 Thomas Roessler <roessler@does-not-exist.org>
*
* This file is part of mutt-ng, see http://www.muttng.org/.
* It's licensed under the GNU General Public License,
* please see the file GPL in the top level source directory.
*/
#if HAVE_CONFIG_H
# include "config.h"
#endif
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
#include <sys/types.h>
#include <dirent.h>
#include <unistd.h>
#include <errno.h>
#include "mutt.h"
#include "charset.h"
#include "ascii.h"
#include "lib/mem.h"
#include "lib/intl.h"
#include "lib/str.h"
#ifndef EILSEQ
# define EILSEQ EINVAL
#endif
/*
* The following list has been created manually from the data under:
* http://www.isi.edu/in-notes/iana/assignments/character-sets
* Last update: 2000-09-07
*
* Note that it includes only the subset of character sets for which
* a preferred MIME name is given.
*/
static struct {
char *key;
char *pref;
} PreferredMIMENames[] = {
{
"ansi_x3.4-1968", "us-ascii"}, {
"iso-ir-6", "us-ascii"}, {
"iso_646.irv:1991", "us-ascii"}, {
"ascii", "us-ascii"}, {
"iso646-us", "us-ascii"}, {
"us", "us-ascii"}, {
"ibm367", "us-ascii"}, {
"cp367", "us-ascii"}, {
"csASCII", "us-ascii"}, {
"csISO2022KR", "iso-2022-kr"}, {
"csEUCKR", "euc-kr"}, {
"csISO2022JP", "iso-2022-jp"}, {
"csISO2022JP2", "iso-2022-jp-2"}, {
"ISO_8859-1:1987", "iso-8859-1"}, {
"iso-ir-100", "iso-8859-1"}, {
"iso_8859-1", "iso-8859-1"}, {
"latin1", "iso-8859-1"}, {
"l1", "iso-8859-1"}, {
"IBM819", "iso-8859-1"}, {
"CP819", "iso-8859-1"}, {
"csISOLatin1", "iso-8859-1"}, {
"ISO_8859-2:1987", "iso-8859-2"}, {
"iso-ir-101", "iso-8859-2"}, {
"iso_8859-2", "iso-8859-2"}, {
"latin2", "iso-8859-2"}, {
"l2", "iso-8859-2"}, {
"csISOLatin2", "iso-8859-2"}, {
"ISO_8859-3:1988", "iso-8859-3"}, {
"iso-ir-109", "iso-8859-3"}, {
"ISO_8859-3", "iso-8859-3"}, {
"latin3", "iso-8859-3"}, {
"l3", "iso-8859-3"}, {
"csISOLatin3", "iso-8859-3"}, {
"ISO_8859-4:1988", "iso-8859-4"}, {
"iso-ir-110", "iso-8859-4"}, {
"ISO_8859-4", "iso-8859-4"}, {
"latin4", "iso-8859-4"}, {
"l4", "iso-8859-4"}, {
"csISOLatin4", "iso-8859-4"}, {
"ISO_8859-6:1987", "iso-8859-6"}, {
"iso-ir-127", "iso-8859-6"}, {
"iso_8859-6", "iso-8859-6"}, {
"ECMA-114", "iso-8859-6"}, {
"ASMO-708", "iso-8859-6"}, {
"arabic", "iso-8859-6"}, {
"csISOLatinArabic", "iso-8859-6"}, {
"ISO_8859-7:1987", "iso-8859-7"}, {
"iso-ir-126", "iso-8859-7"}, {
"ISO_8859-7", "iso-8859-7"}, {
"ELOT_928", "iso-8859-7"}, {
"ECMA-118", "iso-8859-7"}, {
"greek", "iso-8859-7"}, {
"greek8", "iso-8859-7"}, {
"csISOLatinGreek", "iso-8859-7"}, {
"ISO_8859-8:1988", "iso-8859-8"}, {
"iso-ir-138", "iso-8859-8"}, {
"ISO_8859-8", "iso-8859-8"}, {
"hebrew", "iso-8859-8"}, {
"csISOLatinHebrew", "iso-8859-8"}, {
"ISO_8859-5:1988", "iso-8859-5"}, {
"iso-ir-144", "iso-8859-5"}, {
"ISO_8859-5", "iso-8859-5"}, {
"cyrillic", "iso-8859-5"}, {
"csISOLatinCyrillic", "iso8859-5"}, {
"ISO_8859-9:1989", "iso-8859-9"}, {
"iso-ir-148", "iso-8859-9"}, {
"ISO_8859-9", "iso-8859-9"}, {
"latin5", "iso-8859-9"}, /* this is not a bug */
{
"l5", "iso-8859-9"}, {
"csISOLatin5", "iso-8859-9"}, {
"ISO_8859-10:1992", "iso-8859-10"}, {
"iso-ir-157", "iso-8859-10"}, {
"latin6", "iso-8859-10"}, /* this is not a bug */
{
"l6", "iso-8859-10"}, {
"csISOLatin6" "iso-8859-10"}, {
"csKOI8r", "koi8-r"}, {
"MS_Kanji", "Shift_JIS"}, /* Note the underscore! */
{
"csShiftJis", "Shift_JIS"}, {
"Extended_UNIX_Code_Packed_Format_for_Japanese", "EUC-JP"}, {
"csEUCPkdFmtJapanese", "EUC-JP"}, {
"csGB2312", "gb2312"}, {
"csbig5", "big5"},
/*
* End of official brain damage. What follows has been taken
* from glibc's localedata files.
*/
{
"iso_8859-13", "iso-8859-13"}, {
"iso-ir-179", "iso-8859-13"}, {
"latin7", "iso-8859-13"}, /* this is not a bug */
{
"l7", "iso-8859-13"}, {
"iso_8859-14", "iso-8859-14"}, {
"latin8", "iso-8859-14"}, /* this is not a bug */
{
"l8", "iso-8859-14"}, {
"iso_8859-15", "iso-8859-15"}, {
"latin9", "iso-8859-15"}, /* this is not a bug */
/* Suggested by Ionel Mugurel Ciobica <tgakic@sg10.chem.tue.nl> */
{
"latin0", "iso-8859-15"}, /* this is not a bug */
{
"iso_8859-16", "iso-8859-16"}, {
"latin10", "iso-8859-16"}, /* this is not a bug */
/*
* David Champion <dgc@uchicago.edu> has observed this with
* nl_langinfo under SunOS 5.8.
*/
{
"646", "us-ascii"},
/*
* http://www.sun.com/software/white-papers/wp-unicode/
*/
{
"eucJP", "euc-jp"}, {
"PCK", "Shift_JIS"}, {
"ko_KR-euc", "euc-kr"}, {
"zh_TW-big5", "big5"},
/* seems to be common on some systems */
{
"sjis", "Shift_JIS"}, {
"euc-jp-ms", "eucJP-ms"},
/*
* If you happen to encounter system-specific brain-damage with
* respect to character set naming, please add it above this
* comment, and submit a patch to <mutt-dev@mutt.org>.
*/
/* End of aliases. Please keep this line last. */
{
NULL, NULL}
};
#ifdef HAVE_LANGINFO_CODESET
# include <langinfo.h>
void mutt_set_langinfo_charset (void)
{
char buff[LONG_STRING];
char buff2[LONG_STRING];
strfcpy (buff, nl_langinfo (CODESET), sizeof (buff));
mutt_canonical_charset (buff2, sizeof (buff2), buff);
/* finally, set $charset */
if (!(Charset = str_dup (buff2)))
Charset = str_dup ("iso-8859-1");
}
#else
void mutt_set_langinfo_charset (void)
{
Charset = str_dup ("iso-8859-1");
}
#endif
void mutt_canonical_charset (char *dest, size_t dlen, const char *name)
{
size_t i;
char *p;
char scratch[LONG_STRING];
/* catch some common iso-8859-something misspellings */
if (!ascii_strncasecmp (name, "8859", 4) && name[4] != '-')
snprintf (scratch, sizeof (scratch), "iso-8859-%s", name + 4);
else if (!ascii_strncasecmp (name, "8859-", 5))
snprintf (scratch, sizeof (scratch), "iso-8859-%s", name + 5);
else if (!ascii_strncasecmp (name, "iso8859", 7) && name[7] != '-')
snprintf (scratch, sizeof (scratch), "iso_8859-%s", name + 7);
else if (!ascii_strncasecmp (name, "iso8859-", 8))
snprintf (scratch, sizeof (scratch), "iso_8859-%s", name + 8);
else
strfcpy (scratch, NONULL (name), sizeof (scratch));
for (i = 0; PreferredMIMENames[i].key; i++)
if (!ascii_strcasecmp (scratch, PreferredMIMENames[i].key) ||
!str_casecmp (scratch, PreferredMIMENames[i].key)) {
strfcpy (dest, PreferredMIMENames[i].pref, dlen);
return;
}
strfcpy (dest, scratch, dlen);
/* for cosmetics' sake, transform to lowercase. */
for (p = dest; *p; p++)
*p = ascii_tolower (*p);
}
int mutt_chscmp (const char *s, const char *chs)
{
char buffer[STRING];
if (!s)
return 0;
mutt_canonical_charset (buffer, sizeof (buffer), s);
return !ascii_strcasecmp (buffer, chs);
}
#ifndef HAVE_ICONV
iconv_t iconv_open (const char *tocode, const char *fromcode)
{
return (iconv_t) (-1);
}
size_t iconv (iconv_t cd, ICONV_CONST char **inbuf, size_t * inbytesleft,
char **outbuf, size_t * outbytesleft)
{
return 0;
}
int iconv_close (iconv_t cd)
{
return 0;
}
#endif /* !HAVE_ICONV */
/*
* Like iconv_open, but canonicalises the charsets
*/
iconv_t mutt_iconv_open (const char *tocode, const char *fromcode, int flags)
{
char tocode1[SHORT_STRING];
char fromcode1[SHORT_STRING];
char *tocode2, *fromcode2;
char *tmp;
iconv_t cd;
mutt_canonical_charset (tocode1, sizeof (tocode1), tocode);
#ifdef M_ICONV_HOOK_TO
/* Not used. */
if ((flags & M_ICONV_HOOK_TO) && (tmp = mutt_charset_hook (tocode1)))
mutt_canonical_charset (tocode1, sizeof (tocode1), tmp);
#endif
mutt_canonical_charset (fromcode1, sizeof (fromcode1), fromcode);
if ((flags & M_ICONV_HOOK_FROM) && (tmp = mutt_charset_hook (fromcode1)))
mutt_canonical_charset (fromcode1, sizeof (fromcode1), tmp);
if ((cd = iconv_open (tocode1, fromcode1)) != (iconv_t) - 1)
return cd;
if ((tocode2 = mutt_iconv_hook (tocode1))
&& (fromcode2 = mutt_iconv_hook (fromcode1)))
return iconv_open (tocode2, fromcode2);
return (iconv_t) - 1;
}
/*
* Like iconv, but keeps going even when the input is invalid
* If you're supplying inrepls, the source charset should be stateless;
* if you're supplying an outrepl, the target charset should be.
*/
size_t mutt_iconv (iconv_t cd, ICONV_CONST char **inbuf, size_t * inbytesleft,
char **outbuf, size_t * outbytesleft,
ICONV_CONST char **inrepls, const char *outrepl)
{
size_t ret = 0, ret1;
ICONV_CONST char *ib = *inbuf;
size_t ibl = *inbytesleft;
char *ob = *outbuf;
size_t obl = *outbytesleft;
for (;;) {
ret1 = iconv (cd, &ib, &ibl, &ob, &obl);
if (ret1 != (size_t) - 1)
ret += ret1;
if (ibl && obl && errno == EILSEQ) {
if (inrepls) {
/* Try replacing the input */
ICONV_CONST char **t;
for (t = inrepls; *t; t++) {
ICONV_CONST char *ib1 = *t;
size_t ibl1 = str_len (*t);
char *ob1 = ob;
size_t obl1 = obl;
iconv (cd, &ib1, &ibl1, &ob1, &obl1);
if (!ibl1) {
++ib, --ibl;
ob = ob1, obl = obl1;
++ret;
break;
}
}
if (*t)
continue;
}
/* Replace the output */
if (!outrepl)
outrepl = "?";
iconv (cd, 0, 0, &ob, &obl);
if (obl) {
int n = str_len (outrepl);
if (n > obl) {
outrepl = "?";
n = 1;
}
memcpy (ob, outrepl, n);
++ib, --ibl;
ob += n, obl -= n;
++ret;
iconv (cd, 0, 0, 0, 0); /* for good measure */
continue;
}
}
*inbuf = ib, *inbytesleft = ibl;
*outbuf = ob, *outbytesleft = obl;
return ret;
}
}
/*
* Convert a string
* Used in rfc2047.c and rfc2231.c
*/
int mutt_convert_string (char **ps, const char *from, const char *to,
int flags)
{
iconv_t cd;
ICONV_CONST char *repls[] = { "\357\277\275", "?", 0 };
char *s = *ps;
if (!s || !*s)
return 0;
if (to && from && (cd = mutt_iconv_open (to, from, flags)) != (iconv_t) - 1) {
int len;
ICONV_CONST char *ib;
char *buf, *ob;
size_t ibl, obl;
ICONV_CONST char **inrepls = 0;
char *outrepl = 0;
if (mutt_is_utf8 (to))
outrepl = "\357\277\275";
else if (mutt_is_utf8 (from))
inrepls = repls;
else
outrepl = "?";
len = str_len (s);
ib = s, ibl = len + 1;
obl = MB_LEN_MAX * ibl;
ob = buf = mem_malloc (obl + 1);
mutt_iconv (cd, &ib, &ibl, &ob, &obl, inrepls, outrepl);
iconv_close (cd);
*ob = '\0';
mem_free (ps);
*ps = buf;
str_adjust (ps);
return 0;
}
else
return -1;
}
/*
* FGETCONV stuff for converting a file while reading it
* Used in sendlib.c for converting from mutt's Charset
*/
struct fgetconv_s {
FILE *file;
iconv_t cd;
char bufi[512];
char bufo[512];
char *p;
char *ob;
char *ib;
size_t ibl;
ICONV_CONST char **inrepls;
};
struct fgetconv_not {
FILE *file;
iconv_t cd;
};
FGETCONV *fgetconv_open (FILE * file, const char *from, const char *to,
int flags)
{
struct fgetconv_s *fc;
iconv_t cd = (iconv_t) - 1;
static ICONV_CONST char *repls[] = { "\357\277\275", "?", 0 };
if (from && to)
cd = mutt_iconv_open (to, from, flags);
if (cd != (iconv_t) - 1) {
fc = mem_malloc (sizeof (struct fgetconv_s));
fc->p = fc->ob = fc->bufo;
fc->ib = fc->bufi;
fc->ibl = 0;
fc->inrepls = mutt_is_utf8 (to) ? repls : repls + 1;
}
else
fc = mem_malloc (sizeof (struct fgetconv_not));
fc->file = file;
fc->cd = cd;
return (FGETCONV *) fc;
}
char *fgetconvs (char *buf, size_t l, FGETCONV * _fc)
{
int c;
size_t r;
for (r = 0; r + 1 < l;) {
if ((c = fgetconv (_fc)) == EOF)
break;
buf[r++] = (char) c;
if (c == '\n')
break;
}
buf[r] = '\0';
if (r)
return buf;
else
return NULL;
}
int fgetconv (FGETCONV * _fc)
{
struct fgetconv_s *fc = (struct fgetconv_s *) _fc;
if (!fc)
return EOF;
if (fc->cd == (iconv_t) - 1)
return fgetc (fc->file);
if (!fc->p)
return EOF;
if (fc->p < fc->ob)
return (unsigned char) *(fc->p)++;
/* Try to convert some more */
fc->p = fc->ob = fc->bufo;
if (fc->ibl) {
size_t obl = sizeof (fc->bufo);
iconv (fc->cd, (ICONV_CONST char **) &fc->ib, &fc->ibl, &fc->ob, &obl);
if (fc->p < fc->ob)
return (unsigned char) *(fc->p)++;
}
/* If we trusted iconv a bit more, we would at this point
* ask why it had stopped converting ... */
/* Try to read some more */
if (fc->ibl == sizeof (fc->bufi) ||
(fc->ibl && fc->ib + fc->ibl < fc->bufi + sizeof (fc->bufi))) {
fc->p = 0;
return EOF;
}
if (fc->ibl)
memcpy (fc->bufi, fc->ib, fc->ibl);
fc->ib = fc->bufi;
fc->ibl +=
fread (fc->ib + fc->ibl, 1, sizeof (fc->bufi) - fc->ibl, fc->file);
/* Try harder this time to convert some */
if (fc->ibl) {
size_t obl = sizeof (fc->bufo);
mutt_iconv (fc->cd, (ICONV_CONST char **) &fc->ib, &fc->ibl, &fc->ob,
&obl, fc->inrepls, 0);
if (fc->p < fc->ob)
return (unsigned char) *(fc->p)++;
}
/* Either the file has finished or one of the buffers is too small */
fc->p = 0;
return EOF;
}
void fgetconv_close (FGETCONV ** _fc)
{
struct fgetconv_s *fc = (struct fgetconv_s *) *_fc;
if (fc->cd != (iconv_t) - 1)
iconv_close (fc->cd);
mem_free (_fc);
}
char *mutt_get_first_charset (const char *charset)
{
static char fcharset[SHORT_STRING];
const char *c, *c1;
c = charset;
if (!str_len (c))
return "us-ascii";
if (!(c1 = strchr (c, ':')))
return ((char*) charset);
strfcpy (fcharset, c, c1 - c + 1);
return fcharset;
}
static size_t convert_string (ICONV_CONST char *f, size_t flen,
const char *from, const char *to,
char **t, size_t * tlen)
{
iconv_t cd;
char *buf, *ob;
size_t obl, n;
int e;
cd = mutt_iconv_open (to, from, 0);
if (cd == (iconv_t) (-1))
return (size_t) (-1);
obl = 4 * flen + 1;
ob = buf = mem_malloc (obl);
n = iconv (cd, &f, &flen, &ob, &obl);
if (n == (size_t) (-1) || iconv (cd, 0, 0, &ob, &obl) == (size_t) (-1)) {
e = errno;
mem_free (&buf);
iconv_close (cd);
errno = e;
return (size_t) (-1);
}
*ob = '\0';
*tlen = ob - buf;
mem_realloc (&buf, ob - buf + 1);
*t = buf;
iconv_close (cd);
return n;
}
int mutt_convert_nonmime_string (char **ps)
{
const char *c, *c1;
for (c = AssumedCharset; c; c = c1 ? c1 + 1 : 0) {
char *u = *ps;
char *s = NULL;
char *fromcode;
size_t m, n;
size_t ulen = str_len (*ps);
size_t slen;
if (!u || !*u)
return 0;
c1 = strchr (c, ':');
n = c1 ? c1 - c : str_len (c);
if (!n)
continue;
fromcode = mem_malloc (n + 1);
strfcpy (fromcode, c, n + 1);
m = convert_string (u, ulen, fromcode, Charset, &s, &slen);
mem_free (&fromcode);
if (m != (size_t) (-1)) {
mem_free (ps);
*ps = s;
return 0;
}
}
return -1;
}
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