1 /* $NetBSD: vswscanf.c,v 1.12 2013/05/17 12:55:57 joerg 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 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the University of 21 * California, Berkeley and its contributors. 22 * 4. Neither the name of the University nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 */ 38 39 #include <sys/cdefs.h> 40 #if defined(LIBC_SCCS) && !defined(lint) 41 #if 0 42 static char sccsid[] = "@(#)vsscanf.c 8.1 (Berkeley) 6/4/93"; 43 __FBSDID("$FreeBSD: src/lib/libc/stdio/vswscanf.c,v 1.3 2004/04/07 09:55:05 tjr Exp $"); 44 #else 45 __RCSID("$NetBSD: vswscanf.c,v 1.12 2013/05/17 12:55:57 joerg Exp $"); 46 #endif 47 #endif /* LIBC_SCCS and not lint */ 48 49 #include "namespace.h" 50 51 #include <assert.h> 52 #include <limits.h> 53 #include <locale.h> 54 #include <stdarg.h> 55 #include <stdio.h> 56 #include <stdlib.h> 57 #include <string.h> 58 #include <wchar.h> 59 #include "reentrant.h" 60 #include "setlocale_local.h" 61 #include "local.h" 62 63 __weak_alias(vswscanf_l, _vswscanf_l) 64 65 static ssize_t 66 /*ARGSUSED*/ 67 eofread(void *cookie, void *buf, size_t len) 68 { 69 70 return 0; 71 } 72 73 int 74 vswscanf_l(const wchar_t * __restrict str, locale_t loc, 75 const wchar_t * __restrict fmt, va_list ap) 76 { 77 static const mbstate_t initial; 78 mbstate_t mbs; 79 FILE f; 80 char *mbstr; 81 size_t mlen; 82 int r; 83 const wchar_t *rstr = str; 84 struct __sfileext fext; 85 86 /* 87 * XXX Convert the wide character string to multibyte, which 88 * __vfwscanf() will convert back to wide characters. 89 */ 90 mbstr = malloc(wcslen(str) * MB_CUR_MAX_L(loc) + 1); 91 if (mbstr == NULL) 92 return EOF; 93 mbs = initial; 94 if ((mlen = wcsrtombs_l(mbstr, &rstr, SIZE_T_MAX, &mbs, loc)) 95 == (size_t)-1) { 96 free(mbstr); 97 return EOF; 98 } 99 _FILEEXT_SETUP(&f, &fext); 100 (void)memset(WCIO_GET(&f), 0, sizeof(struct wchar_io_data)); 101 f._file = -1; 102 f._flags = __SRD; 103 f._bf._base = f._p = (unsigned char *)mbstr; 104 _DIAGASSERT(__type_fit(int, mlen)); 105 f._bf._size = f._r = (int)mlen; 106 f._read = eofread; 107 _UB(&f)._base = NULL; 108 r = __vfwscanf_unlocked_l(&f, loc, fmt, ap); 109 free(mbstr); 110 111 return r; 112 } 113 114 int 115 vswscanf(const wchar_t * __restrict str, const wchar_t * __restrict fmt, 116 va_list ap) 117 { 118 return vswscanf_l(str, _current_locale(), fmt, ap); 119 } 120