setrunelocale.c revision 130961 
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37/* setrunelocale() is obsolete in FreeBSD 6 -- use ANSI functions instead. */
38#define	OBSOLETE_IN_6
39
40#include <sys/cdefs.h>
41__FBSDID("$FreeBSD: head/lib/libc/locale/setrunelocale.c 130961 2004-06-23 07:01:44Z tjr $");
42
43#include <rune.h>
44#include <errno.h>
45#include <limits.h>
46#include <string.h>
47#include <stdio.h>
48#include <stdlib.h>
49#include <unistd.h>
50#include <wchar.h>
51#include "ldpart.h"
52#include "mblocal.h"
53#include "setlocale.h"
54
55extern int		_none_init(_RuneLocale *);
56extern int		_UTF2_init(_RuneLocale *);
57extern int		_UTF8_init(_RuneLocale *);
58extern int		_EUC_init(_RuneLocale *);
59extern int		_GB18030_init(_RuneLocale *);
60extern int		_GB2312_init(_RuneLocale *);
61extern int		_GBK_init(_RuneLocale *);
62extern int		_BIG5_init(_RuneLocale *);
63extern int		_MSKanji_init(_RuneLocale *);
64extern _RuneLocale	*_Read_RuneMagi(FILE *);
65
66static int		__setrunelocale(const char *);
67
68__warn_references(setrunelocale, "warning: setrunelocale() is deprecated. See setrunelocale(3).");
69int
70setrunelocale(char *encoding)
71{
72	int ret;
73
74	if (!encoding || !*encoding || strlen(encoding) > ENCODING_LEN ||
75	    (encoding[0] == '.' &&
76	     (encoding[1] == '\0' ||
77	      (encoding[1] == '.' && encoding[2] == '\0'))) ||
78	    strchr(encoding, '/') != NULL)
79		return (EINVAL);
80
81	ret = __detect_path_locale();
82	if (ret != 0)
83		return (ret);
84
85	return (__setrunelocale((const char *)encoding));
86}
87
88static int
89__setrunelocale(const char *encoding)
90{
91	FILE *fp;
92	char name[PATH_MAX];
93	_RuneLocale *rl;
94	int saverr, ret;
95	static char ctype_encoding[ENCODING_LEN + 1];
96	static _RuneLocale *CachedRuneLocale;
97	static int Cached__mb_cur_max;
98	static size_t (*Cached__mbrtowc)(wchar_t * __restrict,
99	    const char * __restrict, size_t, mbstate_t * __restrict);
100	static size_t (*Cached__wcrtomb)(char * __restrict, wchar_t,
101	    mbstate_t * __restrict);
102	static int (*Cached__mbsinit)(const mbstate_t *);
103	static size_t (*Cached__mbsrtowcs)(wchar_t * __restrict,
104	    const char ** __restrict, size_t, mbstate_t * __restrict);
105	static size_t (*Cached__wcsrtombs)(char * __restrict,
106	    const wchar_t ** __restrict, size_t, mbstate_t * __restrict);
107
108	/*
109	 * The "C" and "POSIX" locale are always here.
110	 */
111	if (strcmp(encoding, "C") == 0 || strcmp(encoding, "POSIX") == 0) {
112		_CurrentRuneLocale = &_DefaultRuneLocale;
113		__mb_cur_max = 1;
114		__mbrtowc = _none_mbrtowc;
115		__mbsinit = _none_mbsinit;
116		__mbsrtowcs = _none_mbsrtowcs;
117		__wcrtomb = _none_wcrtomb;
118		__wcsrtombs = _none_wcsrtombs;
119		return (0);
120	}
121
122	/*
123	 * If the locale name is the same as our cache, use the cache.
124	 */
125	if (CachedRuneLocale != NULL &&
126	    strcmp(encoding, ctype_encoding) == 0) {
127		_CurrentRuneLocale = CachedRuneLocale;
128		__mb_cur_max = Cached__mb_cur_max;
129		__mbrtowc = Cached__mbrtowc;
130		__mbsinit = Cached__mbsinit;
131		__mbsrtowcs = Cached__mbsrtowcs;
132		__wcrtomb = Cached__wcrtomb;
133		__wcsrtombs = Cached__wcsrtombs;
134		return (0);
135	}
136
137	/*
138	 * Slurp the locale file into the cache.
139	 */
140
141	/* Range checking not needed, encoding length already checked before */
142	(void) strcpy(name, _PathLocale);
143	(void) strcat(name, "/");
144	(void) strcat(name, encoding);
145	(void) strcat(name, "/LC_CTYPE");
146
147	if ((fp = fopen(name, "r")) == NULL)
148		return (errno == 0 ? ENOENT : errno);
149
150	if ((rl = _Read_RuneMagi(fp)) == NULL) {
151		saverr = (errno == 0 ? EFTYPE : errno);
152		(void)fclose(fp);
153		return (saverr);
154	}
155	(void)fclose(fp);
156
157	__mbrtowc = NULL;
158	__mbsinit = NULL;
159	__mbsrtowcs = __mbsrtowcs_std;
160	__wcrtomb = NULL;
161	__wcsrtombs = __wcsrtombs_std;
162	rl->__sputrune = __emulated_sputrune;
163	rl->__sgetrune = __emulated_sgetrune;
164	if (strcmp(rl->__encoding, "NONE") == 0)
165		ret = _none_init(rl);
166	else if (strcmp(rl->__encoding, "UTF2") == 0)
167		ret = _UTF2_init(rl);
168	else if (strcmp(rl->__encoding, "UTF-8") == 0)
169		ret = _UTF8_init(rl);
170	else if (strcmp(rl->__encoding, "EUC") == 0)
171		ret = _EUC_init(rl);
172 	else if (strcmp(rl->__encoding, "GB18030") == 0)
173 		ret = _GB18030_init(rl);
174	else if (strcmp(rl->__encoding, "GB2312") == 0)
175		ret = _GB2312_init(rl);
176	else if (strcmp(rl->__encoding, "GBK") == 0)
177		ret = _GBK_init(rl);
178	else if (strcmp(rl->__encoding, "BIG5") == 0)
179		ret = _BIG5_init(rl);
180	else if (strcmp(rl->__encoding, "MSKanji") == 0)
181		ret = _MSKanji_init(rl);
182	else
183		ret = EFTYPE;
184	if (ret == 0) {
185		if (CachedRuneLocale != NULL) {
186			/* See euc.c */
187			if (strcmp(CachedRuneLocale->__encoding, "EUC") == 0)
188				free(CachedRuneLocale->__variable);
189			free(CachedRuneLocale);
190		}
191		CachedRuneLocale = _CurrentRuneLocale;
192		Cached__mb_cur_max = __mb_cur_max;
193		Cached__mbrtowc = __mbrtowc;
194		Cached__mbsinit = __mbsinit;
195		Cached__mbsrtowcs = __mbsrtowcs;
196		Cached__wcrtomb = __wcrtomb;
197		Cached__wcsrtombs = __wcsrtombs;
198		(void)strcpy(ctype_encoding, encoding);
199	} else
200		free(rl);
201
202	return (ret);
203}
204
205int
206__wrap_setrunelocale(const char *locale)
207{
208	int ret = __setrunelocale(locale);
209
210	if (ret != 0) {
211		errno = ret;
212		return (_LDP_ERROR);
213	}
214	return (_LDP_LOADED);
215}
216
217