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