setrunelocale.c revision 127835 
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37/* setrunelocale() is obsolete in FreeBSD 6 -- use ANSI functions instead.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 127835 2004-04-04 11:31:29Z 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 "setlocale.h"
53
54extern int		_none_init(_RuneLocale *);
55extern int		_UTF2_init(_RuneLocale *);
56extern int		_UTF8_init(_RuneLocale *);
57extern int		_EUC_init(_RuneLocale *);
58extern int		_GB18030_init(_RuneLocale *);
59extern int		_GB2312_init(_RuneLocale *);
60extern int		_GBK_init(_RuneLocale *);
61extern int		_BIG5_init(_RuneLocale *);
62extern int		_MSKanji_init(_RuneLocale *);
63extern _RuneLocale	*_Read_RuneMagi(FILE *);
64
65extern size_t (*__mbrtowc)(wchar_t * __restrict, const char * __restrict,
66    size_t, mbstate_t * __restrict);
67extern size_t (*__wcrtomb)(char * __restrict, wchar_t, mbstate_t * __restrict);
68extern rune_t __emulated_sgetrune(const char *, size_t, const char **);
69extern int __emulated_sputrune(rune_t, char *, size_t, char **);
70extern size_t	_none_mbrtowc(wchar_t * __restrict, const char * __restrict,
71    size_t, mbstate_t * __restrict);
72extern size_t	_none_wcrtomb(char * __restrict, wchar_t,
73    mbstate_t * __restrict);
74
75static int		__setrunelocale(const char *);
76
77__warn_references(setrunelocale, "warning: setrunelocale() is deprecated. See setrunelocale(3).");
78int
79setrunelocale(char *encoding)
80{
81	int ret;
82
83	if (!encoding || !*encoding || strlen(encoding) > ENCODING_LEN ||
84	    (encoding[0] == '.' &&
85	     (encoding[1] == '\0' ||
86	      (encoding[1] == '.' && encoding[2] == '\0'))) ||
87	    strchr(encoding, '/') != NULL)
88		return (EINVAL);
89
90	ret = __detect_path_locale();
91	if (ret != 0)
92		return (ret);
93
94	return (__setrunelocale((const char *)encoding));
95}
96
97static int
98__setrunelocale(const char *encoding)
99{
100	FILE *fp;
101	char name[PATH_MAX];
102	_RuneLocale *rl;
103	int saverr, ret;
104	static char ctype_encoding[ENCODING_LEN + 1];
105	static _RuneLocale *CachedRuneLocale;
106	static int Cached__mb_cur_max;
107	static size_t (*Cached__mbrtowc)(wchar_t * __restrict,
108	    const char * __restrict, size_t, mbstate_t * __restrict);
109	static size_t (*Cached__wcrtomb)(char * __restrict, wchar_t,
110	    mbstate_t * __restrict);
111
112	/*
113	 * The "C" and "POSIX" locale are always here.
114	 */
115	if (strcmp(encoding, "C") == 0 || strcmp(encoding, "POSIX") == 0) {
116		_CurrentRuneLocale = &_DefaultRuneLocale;
117		__mb_cur_max = 1;
118		__mbrtowc = _none_mbrtowc;
119		__wcrtomb = _none_wcrtomb;
120		return (0);
121	}
122
123	/*
124	 * If the locale name is the same as our cache, use the cache.
125	 */
126	if (CachedRuneLocale != NULL &&
127	    strcmp(encoding, ctype_encoding) == 0) {
128		_CurrentRuneLocale = CachedRuneLocale;
129		__mb_cur_max = Cached__mb_cur_max;
130		__mbrtowc = Cached__mbrtowc;
131		__wcrtomb = Cached__wcrtomb;
132		return (0);
133	}
134
135	/*
136	 * Slurp the locale file into the cache.
137	 */
138
139	/* Range checking not needed, encoding length already checked before */
140	(void) strcpy(name, _PathLocale);
141	(void) strcat(name, "/");
142	(void) strcat(name, encoding);
143	(void) strcat(name, "/LC_CTYPE");
144
145	if ((fp = fopen(name, "r")) == NULL)
146		return (errno == 0 ? ENOENT : errno);
147
148	if ((rl = _Read_RuneMagi(fp)) == NULL) {
149		saverr = (errno == 0 ? EFTYPE : errno);
150		(void)fclose(fp);
151		return (saverr);
152	}
153	(void)fclose(fp);
154
155	__mbrtowc = NULL;
156	__wcrtomb = NULL;
157	rl->sputrune = __emulated_sputrune;
158	rl->sgetrune = __emulated_sgetrune;
159	if (strcmp(rl->encoding, "NONE") == 0)
160		ret = _none_init(rl);
161	else if (strcmp(rl->encoding, "UTF2") == 0)
162		ret = _UTF2_init(rl);
163	else if (strcmp(rl->encoding, "UTF-8") == 0)
164		ret = _UTF8_init(rl);
165	else if (strcmp(rl->encoding, "EUC") == 0)
166		ret = _EUC_init(rl);
167 	else if (strcmp(rl->encoding, "GB18030") == 0)
168 		ret = _GB18030_init(rl);
169	else if (strcmp(rl->encoding, "GB2312") == 0)
170		ret = _GB2312_init(rl);
171	else if (strcmp(rl->encoding, "GBK") == 0)
172		ret = _GBK_init(rl);
173	else if (strcmp(rl->encoding, "BIG5") == 0)
174		ret = _BIG5_init(rl);
175	else if (strcmp(rl->encoding, "MSKanji") == 0)
176		ret = _MSKanji_init(rl);
177	else
178		ret = EFTYPE;
179	if (ret == 0) {
180		if (CachedRuneLocale != NULL) {
181			/* See euc.c */
182			if (strcmp(CachedRuneLocale->encoding, "EUC") == 0)
183				free(CachedRuneLocale->variable);
184			free(CachedRuneLocale);
185		}
186		CachedRuneLocale = _CurrentRuneLocale;
187		Cached__mb_cur_max = __mb_cur_max;
188		Cached__mbrtowc = __mbrtowc;
189		Cached__wcrtomb = __wcrtomb;
190		(void)strcpy(ctype_encoding, encoding);
191	} else
192		free(rl);
193
194	return (ret);
195}
196
197int
198__wrap_setrunelocale(const char *locale)
199{
200	int ret = __setrunelocale(locale);
201
202	if (ret != 0) {
203		errno = ret;
204		return (_LDP_ERROR);
205	}
206	return (_LDP_LOADED);
207}
208
209