none.c revision 128004 
1/*-
2 * Copyright (c) 2002-2004 Tim J. Robbins. All rights reserved.
3 * Copyright (c) 1993
4 *	The Regents of the University of California.  All rights reserved.
5 *
6 * This code is derived from software contributed to Berkeley by
7 * Paul Borman at Krystal Technologies.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 *    notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 *    notice, this list of conditions and the following disclaimer in the
16 *    documentation and/or other materials provided with the distribution.
17 * 3. All advertising materials mentioning features or use of this software
18 *    must display the following acknowledgement:
19 *	This product includes software developed by the University of
20 *	California, Berkeley and its contributors.
21 * 4. Neither the name of the University nor the names of its contributors
22 *    may be used to endorse or promote products derived from this software
23 *    without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
28 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35 * SUCH DAMAGE.
36 */
37
38#if defined(LIBC_SCCS) && !defined(lint)
39static char sccsid[] = "@(#)none.c	8.1 (Berkeley) 6/4/93";
40#endif /* LIBC_SCCS and not lint */
41#include <sys/cdefs.h>
42__FBSDID("$FreeBSD: head/lib/libc/locale/none.c 128004 2004-04-07 10:48:19Z tjr $");
43
44#include <errno.h>
45#include <limits.h>
46#include <runetype.h>
47#include <stddef.h>
48#include <stdio.h>
49#include <stdlib.h>
50#include <wchar.h>
51
52extern size_t (*__mbrtowc)(wchar_t * __restrict, const char * __restrict,
53    size_t, mbstate_t * __restrict);
54extern int (*__mbsinit)(const mbstate_t *);
55extern size_t (*__wcrtomb)(char * __restrict, wchar_t, mbstate_t * __restrict);
56
57int	_none_init(_RuneLocale *);
58size_t	_none_mbrtowc(wchar_t * __restrict, const char * __restrict, size_t,
59	    mbstate_t * __restrict);
60int	_none_mbsinit(const mbstate_t *);
61size_t	_none_wcrtomb(char * __restrict, wchar_t, mbstate_t * __restrict);
62
63int
64_none_init(_RuneLocale *rl)
65{
66
67	__mbrtowc = _none_mbrtowc;
68	__mbsinit = _none_mbsinit;
69	__wcrtomb = _none_wcrtomb;
70	_CurrentRuneLocale = rl;
71	__mb_cur_max = 1;
72	return(0);
73}
74
75int
76_none_mbsinit(const mbstate_t *ps __unused)
77{
78
79	/*
80	 * Encoding is not state dependent - we are always in the
81	 * initial state.
82	 */
83	return (1);
84}
85
86size_t
87_none_mbrtowc(wchar_t * __restrict pwc, const char * __restrict s, size_t n,
88    mbstate_t * __restrict ps __unused)
89{
90
91	if (s == NULL)
92		/* Reset to initial shift state (no-op) */
93		return (0);
94	if (n == 0)
95		/* Incomplete multibyte sequence */
96		return ((size_t)-2);
97	if (pwc != NULL)
98		*pwc = (unsigned char)*s;
99	return (*s == '\0' ? 0 : 1);
100}
101
102size_t
103_none_wcrtomb(char * __restrict s, wchar_t wc,
104    mbstate_t * __restrict ps __unused)
105{
106
107	if (s == NULL)
108		/* Reset to initial shift state (no-op) */
109		return (1);
110	if (wc < 0 || wc > UCHAR_MAX) {
111		errno = EILSEQ;
112		return ((size_t)-1);
113	}
114	*s = (unsigned char)wc;
115	return (1);
116}
117