kolibrios-gitea/programs/develop/open watcom/trunk/clib/streamio/freop_s.c
Sergey Semyonov (Serge) 3be3768ce0 update CLib
git-svn-id: svn://kolibrios.org@614 a494cfbc-eb01-0410-851d-a64ba20cac60
2007-08-28 10:31:46 +00:00

89 lines
3.3 KiB
C

/****************************************************************************
*
* Open Watcom Project
*
* Portions Copyright (c) 1983-2002 Sybase, Inc. All Rights Reserved.
*
* ========================================================================
*
* This file contains Original Code and/or Modifications of Original
* Code as defined in and that are subject to the Sybase Open Watcom
* Public License version 1.0 (the 'License'). You may not use this file
* except in compliance with the License. BY USING THIS FILE YOU AGREE TO
* ALL TERMS AND CONDITIONS OF THE LICENSE. A copy of the License is
* provided with the Original Code and Modifications, and is also
* available at www.sybase.com/developer/opensource.
*
* The Original Code and all software distributed under the License are
* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* EXPRESS OR IMPLIED, AND SYBASE AND ALL CONTRIBUTORS HEREBY DISCLAIM
* ALL SUCH WARRANTIES, INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR
* NON-INFRINGEMENT. Please see the License for the specific language
* governing rights and limitations under the License.
*
* ========================================================================
*
* Description: Implementation of freopen_s() - safe version of freopen().
*
****************************************************************************/
#include "variety.h"
#include "saferlib.h"
#include "widechar.h"
#include <wchar.h>
#include <stdio.h>
#include <ctype.h>
#ifdef __WIDECHAR__
#include <wctype.h>
#endif
#include <fcntl.h>
#include <sys/stat.h>
#include "fileacc.h"
#include "fmode.h"
#include "openmode.h"
#include "rtdata.h"
_WCRTLINK errno_t __F_NAME(freopen_s,_wfreopen_s)(
FILE * __restrict * __restrict newstreamptr,
const CHAR_TYPE * __restrict filename,
const CHAR_TYPE * __restrict mode,
FILE * __restrict stream )
/********************************************************************/
{
errno_t rc = -1;
const char *msg;
/* check for runtime-constraints */
/* newstreamptr not null */
/* mode not null */
/* stream not null */
if( __check_constraint_nullptr_msg( msg, newstreamptr ) &&
__check_constraint_nullptr_msg( msg, mode ) &&
__check_constraint_nullptr_msg( msg, stream ) ) {
/* ua.. and uw.. are treated as a.. and w.. */
if( (*mode == __F_NAME('u',L'u')) &&
( (*(mode + 1) == __F_NAME('r',L'r')) ||
(*(mode + 1) == __F_NAME('w',L'w')) ||
(*(mode + 1) == __F_NAME('a',L'a'))) ) {
mode++; /* ignore u for now */
}
*newstreamptr = __F_NAME(freopen,_wfreopen)( filename, mode, stream );
if( *newstreamptr != NULL ) { /* if reopen ok set rc = 0 */
rc = 0;
}
} else {
/* Runtime-constraints found, store zero in newstreamptr */
if( newstreamptr != NULL ) {
*newstreamptr = NULL;
}
/* Now call the handler */
__rtct_fail( __func__, msg, NULL );
}
return( rc );
}