1 /* $OpenBSD: vswscanf.c,v 1.3 2015/08/31 02:53:57 guenther Exp $ */
2
3 /*-
4 * Copyright (c) 1990, 1993
5 * The Regents of the University of California. All rights reserved.
6 *
7 * This code is derived from software contributed to Berkeley by
8 * Donn Seeley at UUNET Technologies, Inc.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 4. Neither the name of the University nor the names of its contributors
19 * may be used to endorse or promote products derived from this software
20 * without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 */
34
35 #include <limits.h>
36 #include <stdarg.h>
37 #include <stdio.h>
38 #include <stdlib.h>
39 #include <string.h>
40 #include <wchar.h>
41 #include "local.h"
42
43 static int eofread(void *, char *, int);
44
45 static int
eofread(void * cookie,char * buf,int len)46 eofread(void *cookie, char *buf, int len)
47 {
48 return (0);
49 }
50
51 int
vswscanf(const wchar_t * __restrict str,const wchar_t * __restrict fmt,__va_list ap)52 vswscanf(const wchar_t * __restrict str, const wchar_t * __restrict fmt,
53 __va_list ap)
54 {
55 mbstate_t mbs;
56 FILE f;
57 struct __sfileext fext;
58 char *mbstr;
59 size_t len, mlen;
60 int r;
61 const wchar_t *strp;
62
63 /*
64 * XXX Convert the wide character string to multibyte, which
65 * __vfwscanf() will convert back to wide characters.
66 */
67 len = wcslen(str) * MB_CUR_MAX;
68 if ((mbstr = malloc(len + 1)) == NULL)
69 return (EOF);
70 bzero(&mbs, sizeof(mbs));
71 strp = str;
72 if ((mlen = wcsrtombs(mbstr, &strp, len, &mbs)) == (size_t)-1) {
73 free(mbstr);
74 return (EOF);
75 }
76 if (mlen == len)
77 mbstr[len] = '\0';
78 _FILEEXT_SETUP(&f, &fext);
79 f._flags = __SRD;
80 f._bf._base = f._p = (unsigned char *)mbstr;
81 f._bf._size = f._r = mlen;
82 f._read = eofread;
83 f._lb._base = NULL;
84 r = __vfwscanf(&f, fmt, ap);
85 free(mbstr);
86
87 return (r);
88 }
89 DEF_STRONG(vswscanf);
90