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1/*-
2 * Copyright (c) 2002-2004 Tim J. Robbins.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27#include <sys/cdefs.h>
28__FBSDID("$FreeBSD: src/lib/libc/locale/mbsnrtowcs.c,v 1.1 2004/07/21 10:54:57 tjr Exp $");
29
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30#include "xlocale_private.h"
31
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32#include <errno.h>
33#include <limits.h>
34#include <stdlib.h>
35#include <wchar.h>
36#include "mblocal.h"
37
38size_t
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39mbsnrtowcs_l(wchar_t * __restrict dst, const char ** __restrict src,
40 size_t nms, size_t len, mbstate_t * __restrict ps, locale_t loc)
3d9156a7 41{
ad3c9f2a 42 NORMALIZE_LOCALE(loc);
3d9156a7 43 if (ps == NULL)
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44 ps = &loc->__mbs_mbsnrtowcs;
45 return (loc->__lc_ctype->__mbsnrtowcs(dst, src, nms, len, ps, loc));
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46}
47
48size_t
ad3c9f2a 49mbsnrtowcs(wchar_t * __restrict dst, const char ** __restrict src,
3d9156a7 50 size_t nms, size_t len, mbstate_t * __restrict ps)
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51{
52 return mbsnrtowcs_l(dst, src, nms, len, ps, __current_locale());
53}
54
55__private_extern__ size_t
56__mbsnrtowcs_std(wchar_t * __restrict dst, const char ** __restrict src,
57 size_t nms, size_t len, mbstate_t * __restrict ps, locale_t loc)
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58{
59 const char *s;
60 size_t nchr;
61 wchar_t wc;
62 size_t nb;
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63 size_t (*__mbrtowc)(wchar_t * __restrict, const char * __restrict,
64 size_t, mbstate_t * __restrict, locale_t)
65 = loc->__lc_ctype->__mbrtowc;
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66
67 s = *src;
68 nchr = 0;
69
70 if (dst == NULL) {
71 for (;;) {
ad3c9f2a 72 if ((nb = __mbrtowc(&wc, s, nms, ps, loc)) == (size_t)-1)
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73 /* Invalid sequence - mbrtowc() sets errno. */
74 return ((size_t)-1);
75 else if (nb == 0 || nb == (size_t)-2)
76 return (nchr);
77 s += nb;
78 nms -= nb;
79 nchr++;
80 }
81 /*NOTREACHED*/
82 }
83
84 while (len-- > 0) {
ad3c9f2a 85 if ((nb = __mbrtowc(dst, s, nms, ps, loc)) == (size_t)-1) {
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86 *src = s;
87 return ((size_t)-1);
88 } else if (nb == (size_t)-2) {
89 *src = s + nms;
90 return (nchr);
91 } else if (nb == 0) {
92 *src = NULL;
93 return (nchr);
94 }
95 s += nb;
96 nms -= nb;
97 nchr++;
98 dst++;
99 }
100 *src = s;
101 return (nchr);
102}