forked from KolibriOS/kolibrios
83 lines
2.9 KiB
C
83 lines
2.9 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: WHEN YOU FIGURE OUT WHAT THIS FILE DOES, PLEASE
|
|
* DESCRIBE IT HERE!
|
|
*
|
|
****************************************************************************/
|
|
|
|
|
|
#include "variety.h"
|
|
#include <string.h>
|
|
|
|
#ifdef M_I86
|
|
|
|
extern char _WCFAR *fast_strncpy( char _WCFAR *, const char _WCFAR *, size_t );
|
|
|
|
#pragma aux fast_strncpy = \
|
|
0x1e /* push ds */\
|
|
0x96 /* xchg si,ax */\
|
|
0x8e 0xd8 /* mov ds,ax */\
|
|
0x57 /* push di */\
|
|
0xac /* L1: lodsb */\
|
|
0xaa /* stosb */\
|
|
0x84 0xc0 /* test al,al */\
|
|
0xe0 0xfa /* loopne L1 */\
|
|
0x31 0xc0 /* xor ax,ax */\
|
|
0xd1 0xe9 /* shr cx,1 */\
|
|
0xf3 0xab /* rep stosw */\
|
|
0x11 0xc9 /* adc cx,cx */\
|
|
0xf3 0xaa /* rep stosb */\
|
|
0x58 /* pop ax */\
|
|
0x1f /* pop ds */\
|
|
parm caller [es di] [si ax] [cx]\
|
|
value [es ax] \
|
|
modify exact [ax cx si di];
|
|
#endif
|
|
|
|
_WCRTLINK char _WCFAR *_fstrncpy( char _WCFAR *dst, const char _WCFAR *src, size_t len )
|
|
{
|
|
#ifdef M_I86
|
|
if( len ) {
|
|
return( fast_strncpy( dst, src, len ) );
|
|
}
|
|
return( dst );
|
|
#else
|
|
char _WCFAR *ret;
|
|
|
|
ret = dst;
|
|
for(;len; --len ) {
|
|
if( *src == '\0' ) break;
|
|
*dst++ = *src++;
|
|
}
|
|
while( len != 0 ) {
|
|
*dst++ = '\0'; /* pad destination string with null chars */
|
|
--len;
|
|
}
|
|
return( ret );
|
|
#endif
|
|
}
|