82 lines
3.1 KiB
C
82 lines
3.1 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 strcat_s() - bounds-checking strcat().
|
||
|
|
*
|
||
|
|
****************************************************************************/
|
||
|
|
|
||
|
|
|
||
|
|
#include "variety.h"
|
||
|
|
#include "saferlib.h"
|
||
|
|
#include "widechar.h"
|
||
|
|
#include <string.h>
|
||
|
|
#include <wchar.h>
|
||
|
|
|
||
|
|
|
||
|
|
_WCRTLINK errno_t __F_NAME(strcat_s,wcscat_s)( CHAR_TYPE * __restrict s1,
|
||
|
|
rsize_t s1max, const CHAR_TYPE * __restrict s2 )
|
||
|
|
/************************************************************************/
|
||
|
|
{
|
||
|
|
errno_t rc = -1;
|
||
|
|
const char *msg;
|
||
|
|
|
||
|
|
// strnlen_s is safe to use as it has no rt constraints
|
||
|
|
rsize_t m = s1max - __F_NAME(strnlen_s,wcsnlen_s)( s1, s1max );
|
||
|
|
|
||
|
|
// Verify runtime-constraints
|
||
|
|
// s1 not NULL
|
||
|
|
// s2 not NULL
|
||
|
|
// s1max <= RSIZE_MAX
|
||
|
|
// s1max != 0
|
||
|
|
// m != 0
|
||
|
|
// m > strnlen_s( s2, m )
|
||
|
|
// s1 and s2 no overlap
|
||
|
|
if( __check_constraint_nullptr_msg( msg, s1 ) &&
|
||
|
|
__check_constraint_nullptr_msg( msg, s2 ) &&
|
||
|
|
__check_constraint_maxsize_msg( msg, s1max ) &&
|
||
|
|
__check_constraint_zero_msg( msg, s1max ) &&
|
||
|
|
__check_constraint_zero_msg( msg, m ) &&
|
||
|
|
__check_constraint_a_gt_b_msg( msg,
|
||
|
|
__F_NAME(strnlen_s,wcsnlen_s)( s2, m ), m - 1 ) &&
|
||
|
|
__check_constraint_overlap_msg( msg, s1, s1max, s2,
|
||
|
|
__F_NAME(strnlen_s,wcsnlen_s)( s2, s1max ) ) ) {
|
||
|
|
|
||
|
|
while( *s1 != NULLCHAR ) ++s1; // find end of field
|
||
|
|
while( *s1++ = *s2++ ); // append source field
|
||
|
|
|
||
|
|
rc = 0;
|
||
|
|
} else {
|
||
|
|
// Runtime-constraints found, store zero in receiving field
|
||
|
|
if( (s1 != NULL) && (s1max > 0) && __lte_rsizmax( s1max ) ) {
|
||
|
|
s1[0] = NULLCHAR;
|
||
|
|
}
|
||
|
|
// Now call the handler
|
||
|
|
__rtct_fail( __func__, msg, NULL );
|
||
|
|
}
|
||
|
|
return( rc );
|
||
|
|
}
|
||
|
|
|