none.c revision 129179 
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 129179 2004-05-13 11:20:27Z 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 <string.h>
51#include <wchar.h>
52#include "mblocal.h"
53
54int	_none_init(_RuneLocale *);
55size_t	_none_mbrtowc(wchar_t * __restrict, const char * __restrict, size_t,
56	    mbstate_t * __restrict);
57int	_none_mbsinit(const mbstate_t *);
58size_t	_none_mbsrtowcs(wchar_t * __restrict, const char ** __restrict,
59	    size_t, mbstate_t * __restrict);
60size_t	_none_wcrtomb(char * __restrict, wchar_t, mbstate_t * __restrict);
61size_t	_none_wcsrtombs(char * __restrict, const wchar_t ** __restrict,
62	    size_t, mbstate_t * __restrict);
63
64int
65_none_init(_RuneLocale *rl)
66{
67
68	__mbrtowc = _none_mbrtowc;
69	__mbsinit = _none_mbsinit;
70	__mbsrtowcs = _none_mbsrtowcs;
71	__wcrtomb = _none_wcrtomb;
72	__wcsrtombs = _none_wcsrtombs;
73	_CurrentRuneLocale = rl;
74	__mb_cur_max = 1;
75	return(0);
76}
77
78int
79_none_mbsinit(const mbstate_t *ps __unused)
80{
81
82	/*
83	 * Encoding is not state dependent - we are always in the
84	 * initial state.
85	 */
86	return (1);
87}
88
89size_t
90_none_mbrtowc(wchar_t * __restrict pwc, const char * __restrict s, size_t n,
91    mbstate_t * __restrict ps __unused)
92{
93
94	if (s == NULL)
95		/* Reset to initial shift state (no-op) */
96		return (0);
97	if (n == 0)
98		/* Incomplete multibyte sequence */
99		return ((size_t)-2);
100	if (pwc != NULL)
101		*pwc = (unsigned char)*s;
102	return (*s == '\0' ? 0 : 1);
103}
104
105size_t
106_none_wcrtomb(char * __restrict s, wchar_t wc,
107    mbstate_t * __restrict ps __unused)
108{
109
110	if (s == NULL)
111		/* Reset to initial shift state (no-op) */
112		return (1);
113	if (wc < 0 || wc > UCHAR_MAX) {
114		errno = EILSEQ;
115		return ((size_t)-1);
116	}
117	*s = (unsigned char)wc;
118	return (1);
119}
120
121size_t
122_none_mbsrtowcs(wchar_t * __restrict dst, const char ** __restrict src,
123    size_t len, mbstate_t * __restrict ps __unused)
124{
125	const char *s;
126	size_t nchr;
127
128	if (dst == NULL)
129		return (strlen(*src));
130
131	s = *src;
132	nchr = 0;
133	while (len-- > 0) {
134		if ((*dst++ = (unsigned char)*s++) == L'\0') {
135			*src = NULL;
136			return (nchr);
137		}
138		nchr++;
139	}
140	*src = s;
141	return (nchr);
142}
143
144size_t
145_none_wcsrtombs(char * __restrict dst, const wchar_t ** __restrict src,
146    size_t len, mbstate_t * __restrict ps __unused)
147{
148	const wchar_t *s;
149	size_t nchr;
150
151	if (dst == NULL)
152		return (wcslen(*src));
153
154	s = *src;
155	nchr = 0;
156	while (len-- > 0) {
157		if (*s < 0 || *s > UCHAR_MAX) {
158			errno = EILSEQ;
159			return ((size_t)-1);
160		}
161		if ((*dst++ = *s++) == '\0') {
162			*src = NULL;
163			return (nchr);
164		}
165		nchr++;
166	}
167	*src = s;
168	return (nchr);
169}
170