setrunelocale.c revision 142654 
1/*-
2 * Copyright (c) 1993
3 *	The Regents of the University of California.  All rights reserved.
4 *
5 * This code is derived from software contributed to Berkeley by
6 * Paul Borman at Krystal Technologies.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 *    notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 *    notice, this list of conditions and the following disclaimer in the
15 *    documentation and/or other materials provided with the distribution.
16 * 3. All advertising materials mentioning features or use of this software
17 *    must display the following acknowledgement:
18 *	This product includes software developed by the University of
19 *	California, Berkeley and its contributors.
20 * 4. Neither the name of the University nor the names of its contributors
21 *    may be used to endorse or promote products derived from this software
22 *    without specific prior written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * SUCH DAMAGE.
35 */
36
37#include <sys/cdefs.h>
38__FBSDID("$FreeBSD: head/lib/libc/locale/setrunelocale.c 142654 2005-02-27 15:11:09Z phantom $");
39
40#include <runetype.h>
41#include <errno.h>
42#include <limits.h>
43#include <string.h>
44#include <stdio.h>
45#include <stdlib.h>
46#include <unistd.h>
47#include <wchar.h>
48#include "ldpart.h"
49#include "mblocal.h"
50#include "setlocale.h"
51
52extern _RuneLocale	*_Read_RuneMagi(FILE *);
53
54static int		__setrunelocale(const char *);
55
56static int
57__setrunelocale(const char *encoding)
58{
59	FILE *fp;
60	char name[PATH_MAX];
61	_RuneLocale *rl;
62	int saverr, ret;
63	static char ctype_encoding[ENCODING_LEN + 1];
64	static _RuneLocale *CachedRuneLocale;
65	static int Cached__mb_cur_max;
66	static size_t (*Cached__mbrtowc)(wchar_t * __restrict,
67	    const char * __restrict, size_t, mbstate_t * __restrict);
68	static size_t (*Cached__wcrtomb)(char * __restrict, wchar_t,
69	    mbstate_t * __restrict);
70	static int (*Cached__mbsinit)(const mbstate_t *);
71	static size_t (*Cached__mbsnrtowcs)(wchar_t * __restrict,
72	    const char ** __restrict, size_t, size_t, mbstate_t * __restrict);
73	static size_t (*Cached__wcsnrtombs)(char * __restrict,
74	    const wchar_t ** __restrict, size_t, size_t,
75	    mbstate_t * __restrict);
76
77	/*
78	 * The "C" and "POSIX" locale are always here.
79	 */
80	if (strcmp(encoding, "C") == 0 || strcmp(encoding, "POSIX") == 0) {
81		_none_init(&_DefaultRuneLocale);
82		return (0);
83	}
84
85	/*
86	 * If the locale name is the same as our cache, use the cache.
87	 */
88	if (CachedRuneLocale != NULL &&
89	    strcmp(encoding, ctype_encoding) == 0) {
90		_CurrentRuneLocale = CachedRuneLocale;
91		__mb_cur_max = Cached__mb_cur_max;
92		__mbrtowc = Cached__mbrtowc;
93		__mbsinit = Cached__mbsinit;
94		__mbsnrtowcs = Cached__mbsnrtowcs;
95		__wcrtomb = Cached__wcrtomb;
96		__wcsnrtombs = Cached__wcsnrtombs;
97		return (0);
98	}
99
100	/*
101	 * Slurp the locale file into the cache.
102	 */
103
104	/* Range checking not needed, encoding length already checked before */
105	(void) strcpy(name, _PathLocale);
106	(void) strcat(name, "/");
107	(void) strcat(name, encoding);
108	(void) strcat(name, "/LC_CTYPE");
109
110	if ((fp = fopen(name, "r")) == NULL)
111		return (errno == 0 ? ENOENT : errno);
112
113	if ((rl = _Read_RuneMagi(fp)) == NULL) {
114		saverr = (errno == 0 ? EFTYPE : errno);
115		(void)fclose(fp);
116		return (saverr);
117	}
118	(void)fclose(fp);
119
120	__mbrtowc = NULL;
121	__mbsinit = NULL;
122	__mbsnrtowcs = __mbsnrtowcs_std;
123	__wcrtomb = NULL;
124	__wcsnrtombs = __wcsnrtombs_std;
125	rl->__sputrune = NULL;
126	rl->__sgetrune = NULL;
127	if (strcmp(rl->__encoding, "NONE") == 0)
128		ret = _none_init(rl);
129	else if (strcmp(rl->__encoding, "UTF-8") == 0)
130		ret = _UTF8_init(rl);
131	else if (strcmp(rl->__encoding, "EUC") == 0)
132		ret = _EUC_init(rl);
133 	else if (strcmp(rl->__encoding, "GB18030") == 0)
134 		ret = _GB18030_init(rl);
135	else if (strcmp(rl->__encoding, "GB2312") == 0)
136		ret = _GB2312_init(rl);
137	else if (strcmp(rl->__encoding, "GBK") == 0)
138		ret = _GBK_init(rl);
139	else if (strcmp(rl->__encoding, "BIG5") == 0)
140		ret = _BIG5_init(rl);
141	else if (strcmp(rl->__encoding, "MSKanji") == 0)
142		ret = _MSKanji_init(rl);
143	else
144		ret = EFTYPE;
145	if (ret == 0) {
146		if (CachedRuneLocale != NULL) {
147			/* See euc.c */
148			if (strcmp(CachedRuneLocale->__encoding, "EUC") == 0)
149				free(CachedRuneLocale->__variable);
150			free(CachedRuneLocale);
151		}
152		CachedRuneLocale = _CurrentRuneLocale;
153		Cached__mb_cur_max = __mb_cur_max;
154		Cached__mbrtowc = __mbrtowc;
155		Cached__mbsinit = __mbsinit;
156		Cached__mbsnrtowcs = __mbsnrtowcs;
157		Cached__wcrtomb = __wcrtomb;
158		Cached__wcsnrtombs = __wcsnrtombs;
159		(void)strcpy(ctype_encoding, encoding);
160	} else
161		free(rl);
162
163	return (ret);
164}
165
166int
167__wrap_setrunelocale(const char *locale)
168{
169	int ret = __setrunelocale(locale);
170
171	if (ret != 0) {
172		errno = ret;
173		return (_LDP_ERROR);
174	}
175	return (_LDP_LOADED);
176}
177
178