setrunelocale.c revision 121845 
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37/* setrunelocale() is obsolete in FreeBSD 6 -- use ANSI functions instead.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 121845 2003-11-01 05:13:13Z 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		_GBK_init(_RuneLocale *);
60extern int		_BIG5_init(_RuneLocale *);
61extern int		_MSKanji_init(_RuneLocale *);
62extern _RuneLocale	*_Read_RuneMagi(FILE *);
63
64extern size_t (*__mbrtowc)(wchar_t * __restrict, const char * __restrict,
65    size_t, mbstate_t * __restrict);
66extern size_t (*__wcrtomb)(char * __restrict, wchar_t, mbstate_t * __restrict);
67extern size_t __emulated_mbrtowc(wchar_t * __restrict, const char * __restrict,
68    size_t, mbstate_t * __restrict ps);
69extern size_t __emulated_wcrtomb(char * __restrict, wchar_t,
70    mbstate_t * __restrict ps);
71extern rune_t __emulated_sgetrune(const char *, size_t, const char **);
72extern int __emulated_sputrune(rune_t, char *, size_t, char **);
73
74static int		__setrunelocale(const char *);
75
76__warn_references(setrunelocale, "warning: setrunelocale() is deprecated. See setrunelocale(3).");
77int
78setrunelocale(char *encoding)
79{
80	int ret;
81
82	if (!encoding || !*encoding || strlen(encoding) > ENCODING_LEN ||
83	    (encoding[0] == '.' &&
84	     (encoding[1] == '\0' ||
85	      (encoding[1] == '.' && encoding[2] == '\0'))) ||
86	    strchr(encoding, '/') != NULL)
87		return (EINVAL);
88
89	ret = __detect_path_locale();
90	if (ret != 0)
91		return (ret);
92
93	return (__setrunelocale((const char *)encoding));
94}
95
96static int
97__setrunelocale(const char *encoding)
98{
99	FILE *fp;
100	char name[PATH_MAX];
101	_RuneLocale *rl;
102	int saverr, ret;
103	static char ctype_encoding[ENCODING_LEN + 1];
104	static _RuneLocale *CachedRuneLocale;
105	static int Cached__mb_cur_max;
106
107	/*
108	 * The "C" and "POSIX" locale are always here.
109	 */
110	if (strcmp(encoding, "C") == 0 || strcmp(encoding, "POSIX") == 0) {
111		_CurrentRuneLocale = &_DefaultRuneLocale;
112		__mb_cur_max = 1;
113		return (0);
114	}
115
116	/*
117	 * If the locale name is the same as our cache, use the cache.
118	 */
119	if (CachedRuneLocale != NULL &&
120	    strcmp(encoding, ctype_encoding) == 0) {
121		_CurrentRuneLocale = CachedRuneLocale;
122		__mb_cur_max = Cached__mb_cur_max;
123		return (0);
124	}
125
126	/*
127	 * Slurp the locale file into the cache.
128	 */
129
130	/* Range checking not needed, encoding length already checked before */
131	(void) strcpy(name, _PathLocale);
132	(void) strcat(name, "/");
133	(void) strcat(name, encoding);
134	(void) strcat(name, "/LC_CTYPE");
135
136	if ((fp = fopen(name, "r")) == NULL)
137		return (errno == 0 ? ENOENT : errno);
138
139	if ((rl = _Read_RuneMagi(fp)) == NULL) {
140		saverr = (errno == 0 ? EFTYPE : errno);
141		(void)fclose(fp);
142		return (saverr);
143	}
144	(void)fclose(fp);
145
146	__mbrtowc = __emulated_mbrtowc;
147	__wcrtomb = __emulated_wcrtomb;
148	rl->sputrune = __emulated_sputrune;
149	rl->sgetrune = __emulated_sgetrune;
150	if (strcmp(rl->encoding, "NONE") == 0)
151		ret = _none_init(rl);
152	else if (strcmp(rl->encoding, "UTF2") == 0)
153		ret = _UTF2_init(rl);
154	else if (strcmp(rl->encoding, "UTF-8") == 0)
155		ret = _UTF8_init(rl);
156	else if (strcmp(rl->encoding, "EUC") == 0)
157		ret = _EUC_init(rl);
158 	else if (strcmp(rl->encoding, "GB18030") == 0)
159 		ret = _GB18030_init(rl);
160	else if (strcmp(rl->encoding, "GBK") == 0)
161		ret = _GBK_init(rl);
162	else if (strcmp(rl->encoding, "BIG5") == 0)
163		ret = _BIG5_init(rl);
164	else if (strcmp(rl->encoding, "MSKanji") == 0)
165		ret = _MSKanji_init(rl);
166	else
167		ret = EFTYPE;
168	if (ret == 0) {
169		if (CachedRuneLocale != NULL) {
170			/* See euc.c */
171			if (strcmp(CachedRuneLocale->encoding, "EUC") == 0)
172				free(CachedRuneLocale->variable);
173			free(CachedRuneLocale);
174		}
175		CachedRuneLocale = _CurrentRuneLocale;
176		Cached__mb_cur_max = __mb_cur_max;
177		(void)strcpy(ctype_encoding, encoding);
178	} else
179		free(rl);
180
181	return (ret);
182}
183
184int
185__wrap_setrunelocale(const char *locale)
186{
187	int ret = __setrunelocale(locale);
188
189	if (ret != 0) {
190		errno = ret;
191		return (_LDP_ERROR);
192	}
193	return (_LDP_LOADED);
194}
195
196