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#ifndef lint
static char *rcsid = "$Id: localencoding.c,v 1.1 2002/01/02 02:46:42 marka Exp $";
#endif
/*
* Copyright (c) 2000 Japan Network Information Center. All rights reserved.
*
* By using this file, you agree to the terms and conditions set forth bellow.
*
* LICENSE TERMS AND CONDITIONS
*
* The following License Terms and Conditions apply, unless a different
* license is obtained from Japan Network Information Center ("JPNIC"),
* a Japanese association, Kokusai-Kougyou-Kanda Bldg 6F, 2-3-4 Uchi-Kanda,
* Chiyoda-ku, Tokyo 101-0047, Japan.
*
* 1. Use, Modification and Redistribution (including distribution of any
* modified or derived work) in source and/or binary forms is permitted
* under this License Terms and Conditions.
*
* 2. Redistribution of source code must retain the copyright notices as they
* appear in each source code file, this License Terms and Conditions.
*
* 3. Redistribution in binary form must reproduce the Copyright Notice,
* this License Terms and Conditions, in the documentation and/or other
* materials provided with the distribution. For the purposes of binary
* distribution the "Copyright Notice" refers to the following language:
* "Copyright (c) Japan Network Information Center. All rights reserved."
*
* 4. Neither the name of JPNIC may be used to endorse or promote products
* derived from this Software without specific prior written approval of
* JPNIC.
*
* 5. Disclaimer/Limitation of Liability: THIS SOFTWARE IS PROVIDED BY JPNIC
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
* PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JPNIC BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
*
* 6. Indemnification by Licensee
* Any person or entities using and/or redistributing this Software under
* this License Terms and Conditions shall defend indemnify and hold
* harmless JPNIC from and against any and all judgements damages,
* expenses, settlement liabilities, cost and other liabilities of any
* kind as a result of use and redistribution of this Software or any
* claim, suite, action, litigation or proceeding by any third party
* arising out of or relates to this License Terms and Conditions.
*
* 7. Governing Law, Jurisdiction and Venue
* This License Terms and Conditions shall be governed by and and
* construed in accordance with the law of Japan. Any person or entities
* using and/or redistributing this Software under this License Terms and
* Conditions hereby agrees and consent to the personal and exclusive
* jurisdiction and venue of Tokyo District Court of Japan.
*/
#include <config.h>
#include <stddef.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#ifdef HAVE_LOCALE_H
#include <locale.h>
#endif
#ifdef HAVE_LANGINFO_H
#include <langinfo.h>
#endif
#include <mdn/logmacro.h>
#include <mdn/localencoding.h>
#include <mdn/debug.h>
#if defined(HAVE_NL_LANGINFO) && defined(CODESET)
/*
* This is the correct method to get the codeset name
* corresponding to the current locale.
*/
const char *
mdn_localencoding_name(void) {
char *name;
TRACE(("mdn_localencoding_name()\n"));
if ((name = getenv(MDN_LOCALCS_ENV)) == NULL)
name = nl_langinfo(CODESET);
TRACE(("local encoding=\"%-.30s\"\n", name == NULL ? "<null>" : name));
return (name);
}
#else
typedef struct locale2encoding {
char *locale_pattern; /* locale name pattern */
char *encoding; /* MIME-preferred charset name */
} locale2encoding_t;
static locale2encoding_t l2e[] = {
{ "*.ISO_8859-1", "ISO-8859-1" },
{ "*.ISO_8859-2", "ISO-8859-2" },
{ "*.SJIS", "Shift_JIS" },
{ "*.Shift_JIS", "Shift_JIS" },
{ "ja_JP.EUC", "EUC-JP" },
{ "ko_KR.EUC", "EUC-KR" },
{ "*.big5" "Big5" },
{ "*.Big5" "Big5" },
{ "*.KOI8-R", "KOI8-R" },
{ "*.GB2312", "GB2312" },
#ifdef hpux
{ "japanese", "Shift_JIS" },
#else
{ "japanese", "EUC-JP" },
#endif
{ "ja", "EUC-JP" },
{ NULL, NULL },
};
static const char *locale_to_encoding(const char *name);
static int match(const char *pattern, const char *str);
const char *
mdn_localencoding_name(void) {
char *name;
TRACE(("mdn_localencoding_name()\n"));
if ((name = getenv(MDN_LOCALCS_ENV)) != NULL) {
TRACE(("local encoding=\"%-.30s\"\n",
name == NULL ? "<null>" : name));
return (name);
}
(void)(
#if HAVE_SETLOCALE
(name = setlocale(LC_CTYPE, NULL)) ||
#endif
(name = getenv("LC_ALL")) ||
(name = getenv("LC_CTYPE")) ||
(name = getenv("LANG")));
name = (char *)locale_to_encoding(name);
TRACE(("local encoding=\"%-.30s\"\n", name == NULL ? "<null>" : name));
return (name);
}
/*
* Locale name to encoding name.
*/
static const char *
locale_to_encoding(const char *name) {
int i;
if (name == NULL)
return (NULL);
for (i = 0; l2e[i].locale_pattern != NULL; i++) {
if (match(l2e[i].locale_pattern, name))
return (l2e[i].encoding);
}
return name;
}
/*
* Wild card matching function that supports only '*'.
*/
static int
match(const char *pattern, const char *str) {
for (;;) {
int c;
switch (c = *pattern++) {
case '\0':
return (*str == '\0');
case '*':
while (!match(pattern, str)) {
if (*str == '\0')
return (0);
str++;
}
return (1);
break;
default:
if (*str++ != c)
return (0);
break;
}
}
}
#endif
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