1 /* $OpenBSD: vswscanf.c,v 1.1 2011/10/16 13:20:51 stsp 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 <sys/cdefs.h> 36 #include <limits.h> 37 #include <stdarg.h> 38 #include <stdio.h> 39 #include <stdlib.h> 40 #include <string.h> 41 #include <wchar.h> 42 #include "local.h" 43 44 static int eofread(void *, char *, int); 45 46 static int 47 eofread(void *cookie, char *buf, int len) 48 { 49 return (0); 50 } 51 52 int 53 vswscanf(const wchar_t * __restrict str, const wchar_t * __restrict fmt, 54 __va_list ap) 55 { 56 mbstate_t mbs; 57 FILE f; 58 struct __sfileext fext; 59 char *mbstr; 60 size_t len, mlen; 61 int r; 62 const wchar_t *strp; 63 64 /* 65 * XXX Convert the wide character string to multibyte, which 66 * __vfwscanf() will convert back to wide characters. 67 */ 68 len = wcslen(str) * MB_CUR_MAX; 69 if ((mbstr = malloc(len + 1)) == NULL) 70 return (EOF); 71 bzero(&mbs, sizeof(mbs)); 72 strp = str; 73 if ((mlen = wcsrtombs(mbstr, &strp, len, &mbs)) == (size_t)-1) { 74 free(mbstr); 75 return (EOF); 76 } 77 if (mlen == len) 78 mbstr[len] = '\0'; 79 _FILEEXT_SETUP(&f, &fext); 80 f._flags = __SRD; 81 f._bf._base = f._p = (unsigned char *)mbstr; 82 f._bf._size = f._r = mlen; 83 f._read = eofread; 84 f._lb._base = NULL; 85 r = __vfwscanf(&f, fmt, ap); 86 free(mbstr); 87 88 return (r); 89 } 90