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 * 4. Neither the name of the University nor the names of its contributors
18 *    may be used to endorse or promote products derived from this software
19 *    without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33
34#include <sys/cdefs.h>
35__FBSDID("$FreeBSD: src/lib/libc/locale/ascii.c,v 1.1 2008/01/21 23:48:12 ache Exp $");
36
37#include <errno.h>
38#include <limits.h>
39#include <runetype.h>
40#include <stddef.h>
41#include <stdio.h>
42#include <stdlib.h>
43#include <string.h>
44#include <wchar.h>
45#include "mblocal.h"
46
47static size_t	_ascii_mbrtowc(wchar_t * __restrict, const char * __restrict,
48		    size_t, mbstate_t * __restrict, locale_t);
49static int	_ascii_mbsinit(const mbstate_t *, locale_t);
50static size_t	_ascii_mbsnrtowcs(wchar_t * __restrict dst,
51		    const char ** __restrict src, size_t nms, size_t len,
52		    mbstate_t * __restrict ps __unused, locale_t);
53static size_t	_ascii_wcrtomb(char * __restrict, wchar_t,
54		    mbstate_t * __restrict, locale_t);
55static size_t	_ascii_wcsnrtombs(char * __restrict, const wchar_t ** __restrict,
56		    size_t, size_t, mbstate_t * __restrict, locale_t);
57
58int
59_ascii_init(struct __xlocale_st_runelocale *xrl)
60{
61
62	xrl->__mbrtowc = _ascii_mbrtowc;
63	xrl->__mbsinit = _ascii_mbsinit;
64	xrl->__mbsnrtowcs = _ascii_mbsnrtowcs;
65	xrl->__wcrtomb = _ascii_wcrtomb;
66	xrl->__wcsnrtombs = _ascii_wcsnrtombs;
67	xrl->__mb_cur_max = 1;
68	xrl->__mb_sb_limit = 128;
69	return(0);
70}
71
72static int
73_ascii_mbsinit(const mbstate_t *ps __unused, locale_t loc __unused)
74{
75
76	/*
77	 * Encoding is not state dependent - we are always in the
78	 * initial state.
79	 */
80	return (1);
81}
82
83static size_t
84_ascii_mbrtowc(wchar_t * __restrict pwc, const char * __restrict s, size_t n,
85    mbstate_t * __restrict ps __unused, locale_t loc __unused)
86{
87
88	if (s == NULL)
89		/* Reset to initial shift state (no-op) */
90		return (0);
91	if (n == 0)
92		/* Incomplete multibyte sequence */
93		return ((size_t)-2);
94	if (*s & 0x80) {
95		errno = EILSEQ;
96		return ((size_t)-1);
97	}
98	if (pwc != NULL)
99		*pwc = (unsigned char)*s;
100	return (*s == '\0' ? 0 : 1);
101}
102
103static size_t
104_ascii_wcrtomb(char * __restrict s, wchar_t wc,
105    mbstate_t * __restrict ps __unused, locale_t loc __unused)
106{
107
108	if (s == NULL)
109		/* Reset to initial shift state (no-op) */
110		return (1);
111	if (wc < 0 || wc > 127) {
112		errno = EILSEQ;
113		return ((size_t)-1);
114	}
115	*s = (unsigned char)wc;
116	return (1);
117}
118
119static size_t
120_ascii_mbsnrtowcs(wchar_t * __restrict dst, const char ** __restrict src,
121    size_t nms, size_t len, mbstate_t * __restrict ps __unused, locale_t loc __unused)
122{
123	const char *s;
124	size_t nchr;
125
126	if (dst == NULL) {
127		for (s = *src; nms > 0 && *s != '\0'; s++, nms--) {
128			if (*s & 0x80) {
129				errno = EILSEQ;
130				return ((size_t)-1);
131			}
132		}
133		return (s - *src);
134	}
135
136	s = *src;
137	nchr = 0;
138	while (len-- > 0 && nms-- > 0) {
139		if (*s & 0x80) {
140			errno = EILSEQ;
141			return ((size_t)-1);
142		}
143		if ((*dst++ = (unsigned char)*s++) == L'\0') {
144			*src = NULL;
145			return (nchr);
146		}
147		nchr++;
148	}
149	*src = s;
150	return (nchr);
151}
152
153static size_t
154_ascii_wcsnrtombs(char * __restrict dst, const wchar_t ** __restrict src,
155    size_t nwc, size_t len, mbstate_t * __restrict ps __unused, locale_t loc __unused)
156{
157	const wchar_t *s;
158	size_t nchr;
159
160	if (dst == NULL) {
161		for (s = *src; nwc > 0 && *s != L'\0'; s++, nwc--) {
162			if (*s < 0 || *s > 127) {
163				errno = EILSEQ;
164				return ((size_t)-1);
165			}
166		}
167		return (s - *src);
168	}
169
170	s = *src;
171	nchr = 0;
172	while (len-- > 0 && nwc-- > 0) {
173		if (*s < 0 || *s > 127) {
174			errno = EILSEQ;
175			return ((size_t)-1);
176		}
177		if ((*dst++ = *s++) == '\0') {
178			*src = NULL;
179			return (nchr);
180		}
181		nchr++;
182	}
183	*src = s;
184	return (nchr);
185}
186
187