150 lines
4.7 KiB
C
150 lines
4.7 KiB
C
/*-
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* Copyright (c) 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Paul Borman at Krystal Technologies.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <rune.h>
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#include <errno.h>
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#include <limits.h>
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#include <string.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include "setlocale.h"
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extern int _none_init(_RuneLocale *);
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extern int _UTF2_init(_RuneLocale *);
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extern int _UTF8_init(_RuneLocale *);
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extern int _EUC_init(_RuneLocale *);
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extern int _GBK_init(_RuneLocale *);
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extern int _BIG5_init(_RuneLocale *);
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extern int _MSKanji_init(_RuneLocale *);
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extern _RuneLocale *_Read_RuneMagi(FILE *);
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int
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setrunelocale(char *encoding)
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{
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FILE *fp;
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char name[PATH_MAX];
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_RuneLocale *rl;
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int saverr, ret;
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static char ctype_encoding[ENCODING_LEN + 1];
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static _RuneLocale *CachedRuneLocale;
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static int Cached__mb_cur_max;
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if (!encoding || !*encoding || strlen(encoding) > ENCODING_LEN ||
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(encoding[0] == '.' &&
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(encoding[1] == '\0' ||
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(encoding[1] == '.' && encoding[2] == '\0'))) ||
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strchr(encoding, '/') != NULL)
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return (EINVAL);
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/*
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* The "C" and "POSIX" locale are always here.
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*/
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if (strcmp(encoding, "C") == 0 || strcmp(encoding, "POSIX") == 0) {
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_CurrentRuneLocale = &_DefaultRuneLocale;
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__mb_cur_max = 1;
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return (0);
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}
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/*
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* If the locale name is the same as our cache, use the cache.
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*/
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if (CachedRuneLocale != NULL &&
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strcmp(encoding, ctype_encoding) == 0) {
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_CurrentRuneLocale = CachedRuneLocale;
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__mb_cur_max = Cached__mb_cur_max;
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return (0);
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}
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/*
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* Slurp the locale file into the cache.
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*/
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ret = __detect_path_locale();
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if (ret != 0)
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return (ret);
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/* Range checking not needed, encoding length already checked above */
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(void) strcpy(name, _PathLocale);
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(void) strcat(name, "/");
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(void) strcat(name, encoding);
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(void) strcat(name, "/LC_CTYPE");
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if ((fp = fopen(name, "r")) == NULL)
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return (errno == 0 ? ENOENT : errno);
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if ((rl = _Read_RuneMagi(fp)) == NULL) {
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saverr = (errno == 0 ? EFTYPE : errno);
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(void)fclose(fp);
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return (saverr);
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}
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(void)fclose(fp);
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if (strcmp(rl->encoding, "NONE") == 0)
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ret = _none_init(rl);
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else if (strcmp(rl->encoding, "UTF2") == 0)
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ret = _UTF2_init(rl);
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else if (strcmp(rl->encoding, "UTF-8") == 0)
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ret = _UTF8_init(rl);
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else if (strcmp(rl->encoding, "EUC") == 0)
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ret = _EUC_init(rl);
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else if (strcmp(rl->encoding, "GBK") == 0)
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ret = _GBK_init(rl);
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else if (strcmp(rl->encoding, "BIG5") == 0)
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ret = _BIG5_init(rl);
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else if (strcmp(rl->encoding, "MSKanji") == 0)
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ret = _MSKanji_init(rl);
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else
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ret = EFTYPE;
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if (ret == 0) {
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if (CachedRuneLocale != NULL) {
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/* See euc.c */
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if (strcmp(CachedRuneLocale->encoding, "EUC") == 0)
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free(CachedRuneLocale->variable);
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free(CachedRuneLocale);
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}
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CachedRuneLocale = _CurrentRuneLocale;
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Cached__mb_cur_max = __mb_cur_max;
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(void)strcpy(ctype_encoding, encoding);
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} else
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free(rl);
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return (ret);
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}
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