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69 lines
2.4 KiB
C
69 lines
2.4 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 BSD style strlcat() and wcslcat().
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*
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****************************************************************************/
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#include "variety.h"
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#include "widechar.h"
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#include <string.h>
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_WCRTLINK size_t __F_NAME(strlcat,wcslcat)( CHAR_TYPE *dst, const CHAR_TYPE *t, size_t n )
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{
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CHAR_TYPE *s;
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size_t len;
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s = dst;
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// Find end of string in destination buffer but don't overrun
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for( len = n; len; --len ) {
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if( *s == NULLCHAR ) break;
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++s;
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}
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// If no null char was found in dst, the buffer is messed up; don't
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// touch it
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if( *s == NULLCHAR ) {
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--len; // Decrement len to leave space for terminating null
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while( len != 0 ) {
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*s = *t;
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if( *s == NULLCHAR ) {
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return( n - len - 1 );
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}
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++s;
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++t;
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--len;
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}
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// Buffer not large enough. Terminate and figure out desired length
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*s = NULLCHAR;
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while( *t++ != NULLCHAR )
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++n;
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--n;
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}
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return( n );
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}
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