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>
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28__FBSDID("$FreeBSD: head/lib/libc/locale/mbsrtowcs.c 129179 2004-05-13 11:20:27Z tjr $");
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28__FBSDID("$FreeBSD: head/lib/libc/locale/mbsrtowcs.c 132497 2004-07-21 10:54:57Z tjr $"); |
29 30#include <errno.h> 31#include <limits.h> 32#include <stdlib.h> 33#include <wchar.h> 34#include "mblocal.h" 35 36size_t 37mbsrtowcs(wchar_t * __restrict dst, const char ** __restrict src, size_t len, 38 mbstate_t * __restrict ps) 39{ 40 static mbstate_t mbs; 41 42 if (ps == NULL) 43 ps = &mbs;
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44 return (__mbsrtowcs(dst, src, len, ps));
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44 return (__mbsnrtowcs(dst, src, SIZE_T_MAX, len, ps)); |
45}
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46
47size_t
48__mbsrtowcs_std(wchar_t * __restrict dst, const char ** __restrict src,
49 size_t len, mbstate_t * __restrict ps)
50{
51 const char *s;
52 size_t nchr;
53 wchar_t wc;
54 int nb;
55
56 s = *src;
57 nchr = 0;
58
59 if (dst == NULL) {
60 for (;;) {
61 if ((nb = (int)__mbrtowc(&wc, s, MB_CUR_MAX, ps)) < 0)
62 /* Invalid sequence - mbrtowc() sets errno. */
63 return ((size_t)-1);
64 else if (nb == 0)
65 return (nchr);
66 s += nb;
67 nchr++;
68 }
69 /*NOTREACHED*/
70 }
71
72 while (len-- > 0) {
73 if ((nb = (int)__mbrtowc(dst, s, MB_CUR_MAX, ps)) < 0) {
74 *src = s;
75 return ((size_t)-1);
76 } else if (nb == 0) {
77 *src = NULL;
78 return (nchr);
79 }
80 s += nb;
81 nchr++;
82 dst++;
83 }
84 *src = s;
85 return (nchr);
86}
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