setrunelocale.c revision 20961 
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
44char *_PathLocale;
45
46extern int		_none_init __P((_RuneLocale *));
47#ifdef XPG4
48extern int		_UTF2_init __P((_RuneLocale *));
49extern int		_EUC_init __P((_RuneLocale *));
50extern int              _xpg4_setrunelocale __P((char *));
51#endif
52extern _RuneLocale      *_Read_RuneMagi __P((FILE *));
53
54#ifdef XPG4
55int
56setrunelocale(encoding)
57	char *encoding;
58{
59	return _xpg4_setrunelocale(encoding);
60}
61#endif
62
63int
64#ifndef XPG4
65setrunelocale(encoding)
66#else
67_xpg4_setrunelocale(encoding)
68#endif
69	char *encoding;
70{
71	FILE *fp;
72	char name[PATH_MAX];
73	_RuneLocale *rl;
74
75	if (!encoding)
76	    return(EFAULT);
77
78	/*
79	 * The "C" and "POSIX" locale are always here.
80	 */
81	if (!strcmp(encoding, "C") || !strcmp(encoding, "POSIX")) {
82		_CurrentRuneLocale = &_DefaultRuneLocale;
83		return(0);
84	}
85
86	if (!_PathLocale)
87		return(EFAULT);
88	/* Range checking already done at upper level caller */
89	(void) strcpy(name, _PathLocale);
90	(void) strcat(name, "/");
91	(void) strcat(name, encoding);
92	(void) strcat(name, "/LC_CTYPE");
93
94	if ((fp = fopen(name, "r")) == NULL)
95		return(ENOENT);
96
97	if ((rl = _Read_RuneMagi(fp)) == 0) {
98		fclose(fp);
99		return(EFTYPE);
100	}
101	fclose(fp);
102
103#ifdef XPG4
104	if (!rl->encoding[0] || !strcmp(rl->encoding, "UTF2")) {
105		return(_UTF2_init(rl));
106#else
107	if (!rl->encoding[0]) {
108		return(EINVAL);
109#endif
110	} else if (!strcmp(rl->encoding, "NONE")) {
111		return(_none_init(rl));
112#ifdef XPG4
113	} else if (!strcmp(rl->encoding, "EUC")) {
114		return(_EUC_init(rl));
115#endif
116	} else
117		return(EINVAL);
118}
119
120