Add the wcsnlen() function.
[dragonfly.git] / lib / libc / stdio / vswscanf.c
CommitLineData
62f08720 1/* $NetBSD: vswscanf.c,v 1.1 2005/05/14 23:51:02 christos Exp $ */
704ee28c 2/* $DragonFly: src/lib/libc/stdio/vswscanf.c,v 1.3 2006/03/02 18:05:30 joerg Exp $ */
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3
4/*-
5 * Copyright (c) 1990, 1993
6 * The Regents of the University of California. All rights reserved.
7 *
8 * This code is derived from software contributed to Berkeley by
9 * Donn Seeley at UUNET Technologies, Inc.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. All advertising materials mentioning features or use of this software
20 * must display the following acknowledgement:
21 * This product includes software developed by the University of
22 * California, Berkeley and its contributors.
23 * 4. Neither the name of the University nor the names of its contributors
24 * may be used to endorse or promote products derived from this software
25 * without specific prior written permission.
26 *
27 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
28 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
29 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
30 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
31 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
32 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
33 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
34 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
35 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
36 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
37 * SUCH DAMAGE.
38 */
39
40#include <limits.h>
41#include <stdarg.h>
42#include <stdio.h>
43#include <stdlib.h>
44#include <string.h>
45#include <wchar.h>
46
47#include "local.h"
48#include "priv_stdio.h"
49
50static int eofread(void *, char *, int);
51
52static int
53/*ARGSUSED*/
54a0004d 54eofread(void *cookie __unused, char *buf __unused, int len __unused)
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55{
56
57 return (0);
58}
59
60int
61vswscanf(const wchar_t * __restrict str, const wchar_t * __restrict fmt,
62 va_list ap)
63{
64 static const mbstate_t initial;
65 mbstate_t mbs;
66 FILE f;
67 char *mbstr;
68 size_t mlen;
69 int r;
70
71 /*
72 * XXX Convert the wide character string to multibyte, which
73 * __vfwscanf() will convert back to wide characters.
74 */
75 if ((mbstr = malloc(wcslen(str) * MB_CUR_MAX + 1)) == NULL)
76 return (EOF);
77 mbs = initial;
78 if ((mlen = wcsrtombs(mbstr, (const wchar_t ** __restrict)&str,
79 SIZE_T_MAX, &mbs)) == (size_t)-1) {
80 free(mbstr);
81 return (EOF);
82 }
83 f.pub._fileno = -1;
84 f.pub._flags = __SRD;
85 f._bf._base = f.pub._p = (unsigned char *)mbstr;
86 f._bf._size = f.pub._r = mlen;
87 f._read = eofread;
88 f._ub._base = NULL;
89 f._lb._base = NULL;
90 f._up = NULL;
91 f.fl_mutex = PTHREAD_MUTEX_INITIALIZER;
92 f.fl_owner = NULL;
93 f.fl_count = 0;
704ee28c 94 memset(WCIO_GET(&f), 0, sizeof(struct wchar_io_data));
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95 r = __vfwscanf_unlocked(&f, fmt, ap);
96 free(mbstr);
97
98 return (r);
99}