Sync libc/stdio with FreeBSD:
[dragonfly.git] / lib / libc / stdio / vswscanf.c
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1/*-
2 * Copyright (c) 1990, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * This code is derived from software contributed to Berkeley by
6 * Donn Seeley at UUNET Technologies, Inc.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
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16 * 4. Neither the name of the University nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
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31 *
32 * @(#)vsscanf.c 8.1 (Berkeley) 6/4/93
33 * $FreeBSD: src/lib/libc/stdio/vswscanf.c,v 1.6 2009/01/15 18:53:52 rdivacky Exp $
34 * $DragonFly: src/lib/libc/stdio/vswscanf.c,v 1.3 2006/03/02 18:05:30 joerg Exp $
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35 */
36
37#include <limits.h>
38#include <stdarg.h>
39#include <stdio.h>
40#include <stdlib.h>
41#include <string.h>
42#include <wchar.h>
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43#include "local.h"
44#include "priv_stdio.h"
45
46static int eofread(void *, char *, int);
47
48static int
54a0004d 49eofread(void *cookie __unused, char *buf __unused, int len __unused)
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50{
51
52 return (0);
53}
54
55int
56vswscanf(const wchar_t * __restrict str, const wchar_t * __restrict fmt,
e0f95098 57 va_list ap)
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58{
59 static const mbstate_t initial;
60 mbstate_t mbs;
61 FILE f;
62 char *mbstr;
63 size_t mlen;
64 int r;
e0f95098 65 const wchar_t *strp;
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66
67 /*
68 * XXX Convert the wide character string to multibyte, which
69 * __vfwscanf() will convert back to wide characters.
70 */
71 if ((mbstr = malloc(wcslen(str) * MB_CUR_MAX + 1)) == NULL)
72 return (EOF);
73 mbs = initial;
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74 strp = str;
75 if ((mlen = wcsrtombs(mbstr, &strp, SIZE_T_MAX, &mbs)) == (size_t)-1) {
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76 free(mbstr);
77 return (EOF);
78 }
79 f.pub._fileno = -1;
80 f.pub._flags = __SRD;
81 f._bf._base = f.pub._p = (unsigned char *)mbstr;
82 f._bf._size = f.pub._r = mlen;
83 f._read = eofread;
84 f._ub._base = NULL;
85 f._lb._base = NULL;
704ee28c 86 memset(WCIO_GET(&f), 0, sizeof(struct wchar_io_data));
e0f95098 87 r = __vfwscanf(&f, fmt, ap);
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88 free(mbstr);
89
90 return (r);
91}