none.c revision 129153 
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 129153 2004-05-12 14:09:04Z 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#include "mblocal.h"
52
53int	_none_init(_RuneLocale *);
54size_t	_none_mbrtowc(wchar_t * __restrict, const char * __restrict, size_t,
55	    mbstate_t * __restrict);
56int	_none_mbsinit(const mbstate_t *);
57size_t	_none_wcrtomb(char * __restrict, wchar_t, mbstate_t * __restrict);
58
59int
60_none_init(_RuneLocale *rl)
61{
62
63	__mbrtowc = _none_mbrtowc;
64	__mbsinit = _none_mbsinit;
65	__wcrtomb = _none_wcrtomb;
66	_CurrentRuneLocale = rl;
67	__mb_cur_max = 1;
68	return(0);
69}
70
71int
72_none_mbsinit(const mbstate_t *ps __unused)
73{
74
75	/*
76	 * Encoding is not state dependent - we are always in the
77	 * initial state.
78	 */
79	return (1);
80}
81
82size_t
83_none_mbrtowc(wchar_t * __restrict pwc, const char * __restrict s, size_t n,
84    mbstate_t * __restrict ps __unused)
85{
86
87	if (s == NULL)
88		/* Reset to initial shift state (no-op) */
89		return (0);
90	if (n == 0)
91		/* Incomplete multibyte sequence */
92		return ((size_t)-2);
93	if (pwc != NULL)
94		*pwc = (unsigned char)*s;
95	return (*s == '\0' ? 0 : 1);
96}
97
98size_t
99_none_wcrtomb(char * __restrict s, wchar_t wc,
100    mbstate_t * __restrict ps __unused)
101{
102
103	if (s == NULL)
104		/* Reset to initial shift state (no-op) */
105		return (1);
106	if (wc < 0 || wc > UCHAR_MAX) {
107		errno = EILSEQ;
108		return ((size_t)-1);
109	}
110	*s = (unsigned char)wc;
111	return (1);
112}
113