stdio/FreeBSD/vswscanf.c

   1 /*-
   2  * Copyright (c) 1990, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * This code is derived from software contributed to Berkeley by
   6  * Donn Seeley at UUNET Technologies, Inc.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  * 3. All advertising materials mentioning features or use of this software
  17  *    must display the following acknowledgement:
  18  *      This product includes software developed by the University of
  19  *      California, Berkeley and its contributors.
  20  * 4. Neither the name of the University nor the names of its contributors
  21  *    may be used to endorse or promote products derived from this software
  22  *    without specific prior written permission.
  23  *
  24  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  25  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  27  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  28  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  29  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  30  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  34  * SUCH DAMAGE.
  35  */
  36
  37 #include <sys/cdefs.h>
  38 #if 0
  39 #if defined(LIBC_SCCS) && !defined(lint)
  40 static char sccsid[] = "@(#)vsscanf.c   8.1 (Berkeley) 6/4/93";
  41 #endif /* LIBC_SCCS and not lint */
  42 __FBSDID("FreeBSD: src/lib/libc/stdio/vsscanf.c,v 1.11 2002/08/21 16:19:57 mike Exp ");
  43 #endif
  44 __FBSDID("$FreeBSD: src/lib/libc/stdio/vswscanf.c,v 1.3 2004/04/07 09:55:05 tjr Exp $");
  45
  46 #include <limits.h>
  47 #include <stdarg.h>
  48 #include <stdio.h>
  49 #include <stdlib.h>
  50 #include <string.h>
  51 #include <wchar.h>
  52 #include "local.h"
  53
  54 static int      eofread(void *, char *, int);
  55
  56 static int
  57 eofread(void *cookie, char *buf, int len)
  58 {
  59
  60         return (0);
  61 }
  62
  63 int
  64 vswscanf(const wchar_t * __restrict str, const wchar_t * __restrict fmt,
  65     va_list ap)
  66 {
  67         static const mbstate_t initial;
  68         mbstate_t mbs;
  69         FILE f;
  70         struct __sFILEX ext;
  71         char *mbstr;
  72         size_t mlen;
  73         int r;
  74
  75         /*
  76          * XXX Convert the wide character string to multibyte, which
  77          * __vfwscanf() will convert back to wide characters.
  78          */
  79         if ((mbstr = malloc(wcslen(str) * MB_CUR_MAX + 1)) == NULL)
  80                 return (EOF);
  81         mbs = initial;
  82         if ((mlen = wcsrtombs(mbstr, &str, SIZE_T_MAX, &mbs)) == (size_t)-1) {
  83                 free(mbstr);
  84                 return (EOF);
  85         }
  86         f._file = -1;
  87         f._flags = __SRD;
  88         f._bf._base = f._p = (unsigned char *)mbstr;
  89         f._bf._size = f._r = mlen;
  90         f._read = eofread;
  91         f._ub._base = NULL;
  92         f._lb._base = NULL;
  93         f._extra = &ext;
  94         INITEXTRA(&f);
  95         r = __vfwscanf(&f, fmt, ap);
  96         free(mbstr);
  97
  98         return (r);
  99 }