LibC/Stdio/vswscanf.c

/*-
 * Copyright (c) 1990, 1993
 *  The Regents of the University of California.  All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Donn Seeley at UUNET Technologies, Inc.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *  This product includes software developed by the University of
 *  California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.

  FreeBSD: src/lib/libc/stdio/vswscanf.c,v 1.3 2004/04/07 09:55:05 tjr Exp
  NetBSD: vswscanf.c,v 1.3 2005/12/02 13:51:22 yamt Exp
 */
#include  <LibConfig.h>
#include  <sys/EfiCdefs.h>

#include  <limits.h>
#include  <stdarg.h>
#include  <stdio.h>
#include  <stdlib.h>
#include  <string.h>
#include  <wchar.h>
#include  <sys/types.h>
#include  "reentrant.h"
#include  "local.h"

static int  eofread(void *, char *, int);

static int
/*ARGSUSED*/
eofread(void *cookie, char *buf, int len)
{
  return (0);
}

int
vswscanf(
  const wchar_t * __restrict str,
  const wchar_t * __restrict fmt,
  va_list ap
  )
{
  static const mbstate_t initial = { 0 };
  mbstate_t mbs;
  FILE f;
  char *mbstr;
  size_t mlen;
  int r;
  const wchar_t *rstr = str;
  struct __sfileext fext = { 0 };

  /*
   * XXX Convert the wide character string to multibyte, which
   * __vfwscanf() will convert back to wide characters.
   */
  if ((mbstr = malloc(wcslen(str) * MB_CUR_MAX + 1)) == NULL)
    return (EOF);
  mbs = initial;
  if ((mlen = wcsrtombs(mbstr, &rstr, SIZE_T_MAX, &mbs)) == (size_t)-1) {
    free(mbstr);
    return (EOF);
  }
  _FILEEXT_SETUP(&f, &fext);
  f._file = -1;
  f._flags = __SRD;
  f._bf._base = f._p = (unsigned char *)mbstr;
  f._bf._size = f._r = (int)mlen;
  f._read = eofread;
  _UB(&f)._base = NULL;
  f._lb._base = NULL;
  r = __vfwscanf_unlocked(&f, fmt, ap);
  free(mbstr);

  return (r);
}