Category : Assembly Language Source Code
Archive   : RHSTDLIB.ZIP
Filename : STRCPY.ASM

stdlib segment para public 'slcode'
assume cs:stdlib
;
;
; strcpy- Copies string pointed at by es:di to string pointed at by dx:si.
; (Sorry for the ackward use of registers, this matches the rest
; of the standard library though).
;
; inputs:
; es:di- Zero-terminated source string.
; dx:si- Buffer for destination string.
;
; outputs: es:di- Points at destination string.
;
; Note: The destination buffer must be large enough to hold the string and
; zero terminating byte.
;
public sl_strcpy
;
sl_strcpy proc far
push ds
push cx
push ax
pushf
push si
;
cld
mov al, 0
mov cx, 0ffffh
push di
repne scasb
pop di
neg cx
mov ax, es
mov ds, ax
mov es, dx
xchg si, di
dec cx
shr cx, 1
jnc CpyWrd
lodsb
stosb
CpyWrd: rep movsw
;
DidByte: pop si
popf
pop ax
pop cx
pop ds
mov es, dx
mov di, si
ret
sl_strcpy endp
;
;
stdlib ends
end