mirror of
https://github.com/reactos/reactos.git
synced 2024-12-27 01:24:38 +00:00
51 lines
1 KiB
C
51 lines
1 KiB
C
/* Copyright (c) 1992, 1995 John E. Davis
|
|
* All rights reserved.
|
|
*
|
|
* You may distribute under the terms of either the GNU General Public
|
|
* License or the Perl Artistic License.
|
|
*/
|
|
|
|
|
|
/* These routines are fast memcpy, memset routines. When available, I
|
|
use system rouines. For msdos, I use inline assembly. */
|
|
|
|
/* The current versions only work in the forward direction only!! */
|
|
|
|
#include "config.h"
|
|
|
|
#include <stdio.h>
|
|
#include "slang.h"
|
|
#include "_slang.h"
|
|
|
|
char *SLmemcpy(char *s1, char *s2, int n)
|
|
{
|
|
#if defined(msdos) && !defined(__WIN32__) && !defined(__GO32__)
|
|
asm mov ax, ds
|
|
asm mov bx, si
|
|
asm mov dx, di
|
|
asm mov cx, n
|
|
asm les di, s1
|
|
asm lds si, s2
|
|
asm cld
|
|
asm rep movsb
|
|
asm mov ds, ax
|
|
asm mov si, bx
|
|
asm mov di, dx
|
|
return(s1);
|
|
|
|
#else
|
|
register char *smax, *s = s1;
|
|
int n2;
|
|
|
|
n2 = n % 4;
|
|
smax = s + (n - 4);
|
|
while (s <= smax)
|
|
{
|
|
*s = *s2; *(s + 1) = *(s2 + 1); *(s + 2) = *(s2 + 2); *(s + 3) = *(s2 + 3);
|
|
s += 4;
|
|
s2 += 4;
|
|
}
|
|
while (n2--) *s++ = *s2++;
|
|
return(s1);
|
|
#endif
|
|
}
|