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82 lines
2.7 KiB
C
82 lines
2.7 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 scanf_s() - safe formatted stream input.
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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 <stdio.h>
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#include <stdarg.h>
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#include <wchar.h>
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#include "scanf.h"
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static int cget_stdin( PTR_SCNF_SPECS specs )
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{
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int c;
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if( (c = __F_NAME(getc,getwc)( stdin )) == __F_NAME(EOF,WEOF) ) {
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specs->eoinp = 1;
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}
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return( c );
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}
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static void uncget_stdin( int c, PTR_SCNF_SPECS specs )
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{
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__F_NAME(ungetc,ungetwc)( c, stdin );
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}
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_WCRTLINK int __F_NAME(scanf_s,wscanf_s)( const CHAR_TYPE * __restrict format, ... )
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{
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va_list arg;
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SCNF_SPECS specs;
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const char *msg;
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int rc;
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/* Basic check for null pointers to see if we can continue */
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if( __check_constraint_nullptr_msg( msg, format ) ) {
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specs.cget_rtn = cget_stdin;
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specs.uncget_rtn = uncget_stdin;
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msg = NULL;
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va_start( arg, format );
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rc = __F_NAME(__scnf_s,__wscnf_s)( (PTR_SCNF_SPECS)&specs, format, &msg, arg );
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va_end( arg );
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if( msg == NULL ) {
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/* no rt-constraint violation inside worker routine */
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return( rc );
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}
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}
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__rtct_fail( __func__, msg, NULL );
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return( __F_NAME(EOF,WEOF) );
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}
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