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freebsd/lib/libc/locale/setrunelocale.c

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/*-
* Copyright (c) 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Paul Borman at Krystal Technologies.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 THE REGENTS OR CONTRIBUTORS 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 DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <rune.h>
#include <errno.h>
#include <limits.h>
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include "setlocale.h"
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extern int _none_init(_RuneLocale *);
extern int _UTF2_init(_RuneLocale *);
extern int _UTF8_init(_RuneLocale *);
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extern int _EUC_init(_RuneLocale *);
extern int _GBK_init(_RuneLocale *);
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extern int _BIG5_init(_RuneLocale *);
extern int _MSKanji_init(_RuneLocale *);
extern _RuneLocale *_Read_RuneMagi(FILE *);
int
setrunelocale(char *encoding)
{
FILE *fp;
char name[PATH_MAX];
_RuneLocale *rl;
int saverr, ret;
static char ctype_encoding[ENCODING_LEN + 1];
static _RuneLocale *CachedRuneLocale;
static int Cached__mb_cur_max;
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if (!encoding || !*encoding || strlen(encoding) > ENCODING_LEN ||
(encoding[0] == '.' &&
(encoding[1] == '\0' ||
(encoding[1] == '.' && encoding[2] == '\0'))) ||
strchr(encoding, '/') != NULL)
return (EINVAL);
/*
* The "C" and "POSIX" locale are always here.
*/
if (strcmp(encoding, "C") == 0 || strcmp(encoding, "POSIX") == 0) {
_CurrentRuneLocale = &_DefaultRuneLocale;
__mb_cur_max = 1;
return (0);
}
/*
* If the locale name is the same as our cache, use the cache.
*/
if (CachedRuneLocale != NULL &&
strcmp(encoding, ctype_encoding) == 0) {
_CurrentRuneLocale = CachedRuneLocale;
__mb_cur_max = Cached__mb_cur_max;
return (0);
}
/*
* Slurp the locale file into the cache.
*/
ret = __detect_path_locale();
if (ret != 0)
return (ret);
/* Range checking not needed, encoding length already checked above */
(void) strcpy(name, _PathLocale);
(void) strcat(name, "/");
(void) strcat(name, encoding);
(void) strcat(name, "/LC_CTYPE");
if ((fp = fopen(name, "r")) == NULL)
return (errno == 0 ? ENOENT : errno);
if ((rl = _Read_RuneMagi(fp)) == NULL) {
saverr = (errno == 0 ? EFTYPE : errno);
(void)fclose(fp);
return (saverr);
}
(void)fclose(fp);
if (strcmp(rl->encoding, "NONE") == 0)
ret = _none_init(rl);
else if (strcmp(rl->encoding, "UTF2") == 0)
ret = _UTF2_init(rl);
else if (strcmp(rl->encoding, "UTF-8") == 0)
ret = _UTF8_init(rl);
else if (strcmp(rl->encoding, "EUC") == 0)
ret = _EUC_init(rl);
else if (strcmp(rl->encoding, "GBK") == 0)
ret = _GBK_init(rl);
else if (strcmp(rl->encoding, "BIG5") == 0)
ret = _BIG5_init(rl);
else if (strcmp(rl->encoding, "MSKanji") == 0)
ret = _MSKanji_init(rl);
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else
ret = EFTYPE;
if (ret == 0) {
if (CachedRuneLocale != NULL) {
/* See euc.c */
if (strcmp(CachedRuneLocale->encoding, "EUC") == 0)
free(CachedRuneLocale->variable);
free(CachedRuneLocale);
}
CachedRuneLocale = _CurrentRuneLocale;
Cached__mb_cur_max = __mb_cur_max;
(void)strcpy(ctype_encoding, encoding);
} else
free(rl);
return (ret);
}