141 lines
4.8 KiB
C
141 lines
4.8 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 strcpy().
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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 <stdio.h>
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#include <string.h>
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#include "riscstr.h"
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#undef strcpy
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extern CHAR_TYPE *__strcpy( CHAR_TYPE *dst, const CHAR_TYPE *src );
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#if defined(__386__)
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#pragma aux __strcpy = \
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" push eax" \
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"L1: mov cl,[edx]" \
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" mov [eax],cl" \
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" cmp cl,0" \
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" je L2" \
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" mov cl,1[edx]"\
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" add edx,2" \
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" mov 1[eax],cl"\
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" add eax,2" \
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" cmp cl,0" \
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" jne L1" \
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"L2: pop eax" \
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parm [eax] [edx] value [eax] modify exact [eax edx ecx];
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#elif defined(M_I86)
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#if defined(__SMALL_DATA__)
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#pragma aux __strcpy = \
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" push di" \
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" test si,1" \
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" je L1" \
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" lodsb" \
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" mov [di],al" \
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" inc di" \
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" cmp al,0" \
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" je L3" \
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"L1: mov ax,[si]" \
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" test al,al" \
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" je L2" \
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" mov [di],ax" \
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" add di,2" \
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" test ah,ah" \
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" je L3" \
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" mov ax,2[si]" \
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" test al,al" \
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" je L2" \
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" mov [di],ax" \
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" add si,4" \
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" add di,2" \
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" test ah,ah" \
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" jne L1" \
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" je L3" \
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"L2: mov [di],al" \
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"L3: pop ax" \
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parm [di] [si] value [ax] modify exact [si di];
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#else // compact, large, or huge
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#pragma aux __strcpy = \
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" push ds" \
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" push di" \
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" mov ds,dx" \
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" test si,1" \
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" je L1" \
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" lodsb" \
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" stosb" \
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" cmp al,0" \
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" je L3" \
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"L1: mov ax,[si]" \
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" test al,al" \
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" je L2" \
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" stosw" \
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" test ah,ah" \
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" je L3" \
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" mov ax,2[si]" \
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" test al,al" \
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" je L2" \
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" stosw" \
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" add si,4" \
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" test ah,ah" \
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" jne L1" \
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" je L3" \
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"L2: stosb" \
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"L3: pop ax" \
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" mov dx,es" \
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" pop ds" \
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parm [es di] [dx si] value [dx ax] modify exact [si di];
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#endif
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#else
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/* currently no pragma for non-x86 */
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#endif
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/* copy string t to string s */
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#if defined(__RISCSTR__) && defined(__WIDECHAR__)
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_WCRTLINK CHAR_TYPE *__simple_wcscpy( CHAR_TYPE *s, const CHAR_TYPE *t )
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#else
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_WCRTLINK CHAR_TYPE *__F_NAME(strcpy,wcscpy)( CHAR_TYPE *s, const CHAR_TYPE *t )
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#endif
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{
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#if !defined(__WIDECHAR__) && defined(_M_IX86)
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return( __strcpy( s, t ) );
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#else
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CHAR_TYPE *dst;
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dst = s;
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while( *dst++ = *t++ )
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;
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return( s );
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#endif
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}
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