87 lines
3.0 KiB
C
87 lines
3.0 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: WHEN YOU FIGURE OUT WHAT THIS FILE DOES, PLEASE
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* DESCRIBE IT HERE!
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*
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****************************************************************************/
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#include "variety.h"
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#include <string.h>
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#ifdef M_I86
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extern char _WCFAR *_fast_strncat( char _WCFAR *, const char _WCFAR *, size_t );
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#pragma aux _fast_strncat = \
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0x1e /* push ds */\
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0x96 /* xchg si,ax */\
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0x8e 0xd8 /* mov ds,ax */\
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0x57 /* push di */\
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0xb9 0xff 0xff /* mov cx,ffffh */\
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0x31 0xc0 /* xor ax,ax */\
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0xf2 0xae /* repne scasb */\
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0x4f /* dec di */\
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0x89 0xd1 /* mov cx,dx */\
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0xac /* L1: lodsb */\
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0xaa /* stosb */\
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0x84 0xc0 /* test al,al */\
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0xe0 0xfa /* loopne L1 */\
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0x74 0x03 /* je L2 */\
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0x26 0x88 0x25 /* mov es:[di],ah */\
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0x58 /* L2: pop ax */\
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0x1f /* pop ds */\
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parm caller [es di] [si ax] [dx]\
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value [es ax] \
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modify exact [ax cx si di];
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#endif
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/* concatenate t to the end of dst */
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_WCRTLINK char _WCFAR *_fstrncat( char _WCFAR *dst, const char _WCFAR *t, size_t n )
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{
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#ifdef M_I86
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if( n ) {
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return( _fast_strncat( dst, t, n ) );
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}
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return( dst );
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#else
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char _WCFAR *s;
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s = _fmemchr( dst, '\0', ~0 );
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while( n != 0 ) {
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*s = *t;
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if( *s == '\0' ) break;
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++s;
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++t;
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--n;
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}
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*s = '\0';
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return( dst );
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#endif
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}
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