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iconv-detect.c
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iconv-detect.c
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/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/* GMime
* Copyright (C) 1999-2022 Jeffrey Stedfast
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License
* as published by the Free Software Foundation; either version 2.1
* of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free
* Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301, USA.
*/
#include <stdio.h>
#include <stdlib.h>
#include <iconv.h>
enum {
ISO_UNSUPPORTED = 0,
/* iso-8859-1 */
ISO_DASH_UINT_DASH_UINT_LOWER = (1 << 0),
ISO_DASH_UINT_DASH_UINT = (1 << 1),
ISO_UINT_DASH_UINT = (1 << 2),
ISO_UINT_UINT = (1 << 3),
ISO_UNDER_UINT_DASH_UINT = (1 << 4),
NO_ISO_UINT_DASH_UINT = (1 << 5),
/* iso-10646-1 */
/*ISO_DASH_UINT_DASH_UINT_LOWER = (1 << 0),*/
/*ISO_DASH_UINT_DASH_UINT = (1 << 1),*/
/*ISO_UINT_DASH_UINT = (1 << 2),*/
ISO_DASH_UINT_LOWER = (1 << 3),
ISO_DASH_UINT = (1 << 4),
ISO_UINT = (1 << 5),
UCS4 = (1 << 6),
/* iso-2022-jp */
ISO_DASH_UINT_DASH_STR_LOWER = (1 << 0),
ISO_DASH_UINT_DASH_STR = (1 << 1),
ISO_UINT_DASH_STR = (1 << 2),
/* shift-jis */
SHIFT_DASH_JIS = (1 << 0),
SHIFT_UNDERSCORE_JIS = (1 << 1),
SJIS = (1 << 2),
SHIFT_JISX0213 = (1 << 3),
};
typedef struct {
char *charset;
char *format;
int id;
} CharInfo;
static CharInfo iso8859_tests[] = {
{ "iso-8859-1", "iso-%u-%u", ISO_DASH_UINT_DASH_UINT_LOWER },
{ "ISO-8859-1", "ISO-%u-%u", ISO_DASH_UINT_DASH_UINT },
{ "ISO8859-1", "ISO%u-%u", ISO_UINT_DASH_UINT },
{ "ISO88591", "ISO%u%u", ISO_UINT_UINT },
{ "ISO_8859-1", "ISO_%u-%u", ISO_UNDER_UINT_DASH_UINT },
{ "8859-1", "%u-%u", NO_ISO_UINT_DASH_UINT },
};
static int num_iso8859_tests = sizeof (iso8859_tests) / sizeof (CharInfo);
static CharInfo iso2022_tests[] = {
{ "iso-2022-jp", "iso-%u-%s", ISO_DASH_UINT_DASH_STR_LOWER },
{ "ISO-2022-JP", "ISO-%u-%s", ISO_DASH_UINT_DASH_STR },
{ "ISO2022-JP", "ISO%u-%s", ISO_UINT_DASH_STR },
};
static int num_iso2022_tests = sizeof (iso2022_tests) / sizeof (CharInfo);
static CharInfo shiftjis_tests[] = {
{ "shift-jis", "shift-jis", SHIFT_DASH_JIS },
{ "shift_jis", "shift_jis", SHIFT_UNDERSCORE_JIS },
{ "sjis", "sjis", SJIS },
{ "shift_jisx0213", "shift_jisx0213", SHIFT_JISX0213 },
};
static int num_shiftjis_tests = sizeof (shiftjis_tests) / sizeof (CharInfo);
static CharInfo iso10646_tests[] = {
{ "iso-10646-1", "iso-%u-%u", ISO_DASH_UINT_DASH_UINT_LOWER },
{ "ISO-10646-1", "ISO-%u-%u", ISO_DASH_UINT_DASH_UINT },
{ "ISO10646-1", "ISO%u-%u", ISO_UINT_DASH_UINT },
{ "iso-10646", "iso-%u", ISO_DASH_UINT_LOWER },
{ "ISO-10646", "ISO-%u", ISO_DASH_UINT },
{ "ISO10646", "ISO%u", ISO_UINT },
{ "UCS-4BE", "UCS-4BE", UCS4 },
};
static int num_iso10646_tests = sizeof (iso10646_tests) / sizeof (CharInfo);
int main (int argc, char **argv)
{
unsigned int iso8859, iso2022, iso10646, shiftjis;
CharInfo *info;
iconv_t cd;
FILE *fp;
int i;
if (!(fp = fopen ("iconv-detect.h", "w")))
return EXIT_FAILURE;
fprintf (fp, "/* This is an auto-generated header, DO NOT EDIT! */\n\n");
iso8859 = ISO_UNSUPPORTED;
info = iso8859_tests;
/*printf ("#define DEFAULT_ISO_FORMAT(iso,codepage)\t");*/
for (i = 0; i < num_iso8859_tests; i++) {
cd = iconv_open (info[i].charset, "UTF-8");
if (cd != (iconv_t) -1) {
iconv_close (cd);
/*printf ("(\"%s\", (iso), (codepage))\n", info[i].format);*/
fprintf (stderr, "System prefers %s\n", info[i].charset);
iso8859 = info[i].id;
break;
}
}
if (iso8859 == ISO_UNSUPPORTED) {
fprintf (stderr, "System doesn't support any ISO-8859-1 formats\n");
fprintf (fp, "#define ICONV_ISO_INT_FORMAT \"%s\"\n", info[0].format);
#ifdef CONFIGURE_IN
return EXIT_FAILURE;
#endif
} else {
fprintf (fp, "#define ICONV_ISO_INT_FORMAT \"%s\"\n", info[i].format);
}
iso2022 = ISO_UNSUPPORTED;
info = iso2022_tests;
/*printf ("#define ISO_2022_FORMAT(iso,codepage)\t");*/
for (i = 0; i < num_iso2022_tests; i++) {
cd = iconv_open (info[i].charset, "UTF-8");
if (cd != (iconv_t) -1) {
iconv_close (cd);
/*printf ("(\"%s\", (iso), (codepage))\n", info[i].format);*/
fprintf (stderr, "System prefers %s\n", info[i].charset);
iso2022 = info[i].id;
break;
}
}
if (iso2022 == ISO_UNSUPPORTED) {
fprintf (stderr, "System doesn't support any ISO-2022 formats\n");
fprintf (fp, "#define ICONV_ISO_STR_FORMAT \"%s\"\n", info[0].format);
#ifdef CONFIGURE_IN
return EXIT_FAILURE;
#endif
} else {
fprintf (fp, "#define ICONV_ISO_STR_FORMAT \"%s\"\n", info[i].format);
}
shiftjis = ISO_UNSUPPORTED;
info = shiftjis_tests;
/*printf ("#define ISO_2022_FORMAT(iso,codepage)\t");*/
for (i = 0; i < num_shiftjis_tests; i++) {
cd = iconv_open (info[i].charset, "UTF-8");
if (cd != (iconv_t) -1) {
iconv_close (cd);
/*printf ("(\"%s\", (iso), (codepage))\n", info[i].format);*/
fprintf (stderr, "System prefers %s\n", info[i].charset);
shiftjis = info[i].id;
break;
}
}
if (shiftjis == ISO_UNSUPPORTED) {
fprintf (stderr, "System doesn't support any SHIFT-JIS aliases\n");
fprintf (fp, "#define ICONV_SHIFT_JIS \"%s\"\n", info[0].format);
#ifdef CONFIGURE_IN
return EXIT_FAILURE;
#endif
} else {
fprintf (fp, "#define ICONV_SHIFT_JIS \"%s\"\n", info[i].format);
}
iso10646 = ISO_UNSUPPORTED;
info = iso10646_tests;
/*printf ("#define ISO_10646_FORMAT(iso,codepage)\t");*/
for (i = 0; i < num_iso10646_tests; i++) {
cd = iconv_open (info[i].charset, "UTF-8");
if (cd != (iconv_t) -1) {
iconv_close (cd);
/*if (info[i].id < ISO_DASH_UINT_LOWER)
printf ("(\"%s\", (iso), (codepage))\n", info[i].format);
else
printf ("(\"%s\", (iso))\n", info[i].format);*/
fprintf (stderr, "System prefers %s\n", info[i].charset);
iso10646 = info[i].id;
break;
}
}
/* we don't need a printf format for iso-10646 because there is only 1 */
if (iso10646 == ISO_UNSUPPORTED) {
fprintf (stderr, "System doesn't support any ISO-10646-1 formats\n");
fprintf (fp, "#define ICONV_10646 \"%s\"\n", info[0].charset);
#ifdef CONFIGURE_IN
return EXIT_FAILURE;
#endif
} else {
fprintf (fp, "#define ICONV_10646 \"%s\"\n", info[i].charset);
}
fclose (fp);
return EXIT_SUCCESS;
}