lib/libc/stdio/vswscanf.c

   1 /*      $NetBSD: vswscanf.c,v 1.3.28.1 2009/01/04 17:02:20 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 1.3.28.1 2009/01/04 17:02:20 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 }