1 /* $OpenBSD: vswscanf.c,v 1.2 2012/12/05 23:20:01 deraadt 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 46 eofread(void *cookie, char *buf, int len) 47 { 48 return (0); 49 } 50 51 int 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
