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strlen.asm
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Assembly Source File
|
1991-10-12
|
598b
|
46 lines
StdGrp group stdlib,stddata
stddata segment para public 'sldata'
stddata ends
;
stdlib segment para public 'slcode'
assume cs:stdgrp
;
;
; strlen- Computes the length of the string which ES:DI points at.
;
; inputs:
;
; ES:DI- Points at string to compute the length of.
;
; output:
;
; CX- Length of string.
;
;
public sl_strlen
;
sl_strlen proc far
push ax
pushf
push si
push di
;
cld
mov al, 0
mov cx, 0ffffh
repne scasb
neg cx
dec cx
dec cx
;
pop di
pop si
popf
pop ax
ret
sl_strlen endp
;
;
stdlib ends
end