StdLib/LibC/Stdio/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   FreeBSD: src/lib/libc/stdio/vswscanf.c,v 1.3 2004/04/07 09:55:05 tjr Exp
  37   NetBSD: vswscanf.c,v 1.3 2005/12/02 13:51:22 yamt Exp
  38  */
  39 #include  <LibConfig.h>
  40 #include  <sys/EfiCdefs.h>
  41
  42 #include  <limits.h>
  43 #include  <stdarg.h>
  44 #include  <stdio.h>
  45 #include  <stdlib.h>
  46 #include  <string.h>
  47 #include  <wchar.h>
  48 #include  <sys/types.h>
  49 #include  "reentrant.h"
  50 #include  "local.h"
  51
  52 static int  eofread(void *, char *, int);
  53
  54 static int
  55 /*ARGSUSED*/
  56 eofread(void *cookie, char *buf, int len)
  57 {
  58   return (0);
  59 }
  60
  61 int
  62 vswscanf(
  63   const wchar_t * __restrict str,
  64   const wchar_t * __restrict fmt,
  65   va_list ap
  66   )
  67 {
  68   static const mbstate_t initial = { 0 };
  69   mbstate_t mbs;
  70   FILE f;
  71   char *mbstr;
  72   size_t mlen;
  73   int r;
  74   const wchar_t *rstr = str;
  75   struct __sfileext fext = { { 0 } };
  76
  77   /*
  78    * XXX Convert the wide character string to multibyte, which
  79    * __vfwscanf() will convert back to wide characters.
  80    */
  81   if ((mbstr = malloc(wcslen(str) * MB_CUR_MAX + 1)) == NULL)
  82     return (EOF);
  83   mbs = initial;
  84   if ((mlen = wcsrtombs(mbstr, &rstr, SIZE_T_MAX, &mbs)) == (size_t)-1) {
  85     free(mbstr);
  86     return (EOF);
  87   }
  88   _FILEEXT_SETUP(&f, &fext);
  89   f._file = -1;
  90   f._flags = __SRD;
  91   f._bf._base = f._p = (unsigned char *)mbstr;
  92   f._bf._size = f._r = (int)mlen;
  93   f._read = eofread;
  94   _UB(&f)._base = NULL;
  95   f._lb._base = NULL;
  96   r = __vfwscanf_unlocked(&f, fmt, ap);
  97   free(mbstr);
  98
  99   return (r);
 100 }