1 /* $NetBSD: vswscanf.c,v 1.4 2008/11/16 03:16:00 christos 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 1.4 2008/11/16 03:16:00 christos Exp $"); 46 #endif 47 #endif /* LIBC_SCCS and not lint */ 48 49 #include <limits.h> 50 #include <stdarg.h> 51 #include <stdio.h> 52 #include <stdlib.h> 53 #include <string.h> 54 #include <wchar.h> 55 #include "reentrant.h" 56 #include "local.h" 57 58 static int eofread(void *, char *, int); 59 60 static int 61 /*ARGSUSED*/ 62 eofread(void *cookie, char *buf, int len) 63 { 64 65 return (0); 66 } 67 68 int 69 vswscanf(const wchar_t * __restrict str, const wchar_t * __restrict fmt, 70 va_list ap) 71 { 72 static const mbstate_t initial; 73 mbstate_t mbs; 74 FILE f; 75 char *mbstr; 76 size_t mlen; 77 int r; 78 const wchar_t *rstr = str; 79 struct __sfileext fext; 80 81 /* 82 * XXX Convert the wide character string to multibyte, which 83 * __vfwscanf() will convert back to wide characters. 84 */ 85 if ((mbstr = malloc(wcslen(str) * MB_CUR_MAX + 1)) == NULL) 86 return (EOF); 87 mbs = initial; 88 if ((mlen = wcsrtombs(mbstr, &rstr, SIZE_T_MAX, &mbs)) == (size_t)-1) { 89 free(mbstr); 90 return (EOF); 91 } 92 _FILEEXT_SETUP(&f, &fext); 93 (void)memset(WCIO_GET(&f), 0, sizeof(struct wchar_io_data)); 94 f._file = -1; 95 f._flags = __SRD; 96 f._bf._base = f._p = (unsigned char *)mbstr; 97 f._bf._size = f._r = mlen; 98 f._read = eofread; 99 _UB(&f)._base = NULL; 100 f._lb._base = NULL; 101 r = __vfwscanf_unlocked(&f, fmt, ap); 102 free(mbstr); 103 104 return (r); 105 } 106