rune.c revision 10026 
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#if defined(LIBC_SCCS) && !defined(lint)
38static char sccsid[] = "@(#)rune.c	8.1 (Berkeley) 6/4/93";
39#endif /* LIBC_SCCS and not lint */
40
41#include <ctype.h>
42#include <errno.h>
43#include <limits.h>
44#include <rune.h>
45#include <stdio.h>
46#include <stdlib.h>
47#include "common_rune.h"
48
49char *_PathLocale;
50
51extern int		_none_init __P((_RuneLocale *));
52extern int		_UTF2_init __P((_RuneLocale *));
53extern int		_EUC_init __P((_RuneLocale *));
54
55int
56setrunelocale(encoding)
57	char *encoding;
58{
59	FILE *fp;
60	char name[PATH_MAX];
61	_RuneLocale *rl;
62
63	if (!encoding)
64	    return(EFAULT);
65
66	/*
67	 * The "C" and "POSIX" locale are always here.
68	 */
69	if (!strcmp(encoding, "C") || !strcmp(encoding, "POSIX")) {
70		_CurrentRuneLocale = &_DefaultRuneLocale;
71		return(0);
72	}
73
74	if (!PathLocale && !(PathLocale = getenv("PATH_LOCALE")))
75		PathLocale = _PATH_LOCALE;
76
77	(void) strcpy(name, PathLocale);
78	(void) strcat(name, "/");
79	(void) strcat(name, encoding);
80	(void) strcat(name, "/LC_CTYPE");
81
82	if ((fp = fopen(name, "r")) == NULL)
83		return(ENOENT);
84
85	if ((rl = _Read_RuneMagi(fp)) == 0) {
86		fclose(fp);
87		return(EFTYPE);
88	}
89	fclose(fp);
90
91	if (!rl->encoding[0] || !strcmp(rl->encoding, "UTF2")) {
92		return(_UTF2_init(rl));
93	} else if (!strcmp(rl->encoding, "NONE")) {
94		return(_none_init(rl));
95	} else if (!strcmp(rl->encoding, "EUC")) {
96		return(_EUC_init(rl));
97	} else
98		return(EINVAL);
99}
100
101void
102setinvalidrune(ir)
103	rune_t ir;
104{
105	_INVALID_RUNE = ir;
106}
107
108