setrunelocale.c revision 22330 
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 <rune.h>
38#include <errno.h>
39#include <limits.h>
40#include <string.h>
41#include <stdio.h>
42#include <stdlib.h>
43#include "setlocale.h"
44
45extern int		_none_init __P((_RuneLocale *));
46#ifdef XPG4
47extern int		_UTF2_init __P((_RuneLocale *));
48extern int		_EUC_init __P((_RuneLocale *));
49extern int              _xpg4_setrunelocale __P((char *));
50#endif
51extern _RuneLocale      *_Read_RuneMagi __P((FILE *));
52
53#ifdef XPG4
54int
55setrunelocale(encoding)
56	char *encoding;
57{
58	return _xpg4_setrunelocale(encoding);
59}
60#endif
61
62int
63#ifndef XPG4
64setrunelocale(encoding)
65#else
66_xpg4_setrunelocale(encoding)
67#endif
68	char *encoding;
69{
70	FILE *fp;
71	char name[PATH_MAX];
72	_RuneLocale *rl;
73
74	if (!encoding || strlen(encoding) > ENCODING_LEN)
75	    return(EFAULT);
76
77	/*
78	 * The "C" and "POSIX" locale are always here.
79	 */
80	if (!strcmp(encoding, "C") || !strcmp(encoding, "POSIX")) {
81		_CurrentRuneLocale = &_DefaultRuneLocale;
82		return(0);
83	}
84
85	if (!_PathLocale)
86		_PathLocale = _PATH_LOCALE;
87	/* Range checking not needed, encoding length already checked above */
88	(void) strcpy(name, _PathLocale);
89	(void) strcat(name, "/");
90	(void) strcat(name, encoding);
91	(void) strcat(name, "/LC_CTYPE");
92
93	if ((fp = fopen(name, "r")) == NULL)
94		return(ENOENT);
95
96	if ((rl = _Read_RuneMagi(fp)) == 0) {
97		fclose(fp);
98		return(EFTYPE);
99	}
100	fclose(fp);
101
102#ifdef XPG4
103	if (!rl->encoding[0] || !strcmp(rl->encoding, "UTF2")) {
104		return(_UTF2_init(rl));
105#else
106	if (!rl->encoding[0]) {
107		return(EINVAL);
108#endif
109	} else if (!strcmp(rl->encoding, "NONE")) {
110		return(_none_init(rl));
111#ifdef XPG4
112	} else if (!strcmp(rl->encoding, "EUC")) {
113		return(_EUC_init(rl));
114#endif
115	} else
116		return(EINVAL);
117}
118
119