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kvisc/dos/str/strlen.k
julianb0 ea6ec1f01e
dos
2019-05-30 21:46:00 +02:00

37 lines
444 B
Plaintext

; The OS/K Team licenses this file to you under the MIT license.
; See the LICENSE file in the project root for more information.
;
; int strlen(char *)
;
strlen:
xor rax, rax
.1:
test b[ax0], b[ax0]
cretz
inc rax
inc ax0
jmp .1
;
; int strnlen(char *, int)
;
strnlen:
xor rax, rax
mov rcx, ax1
jcxz .2
dec rcx
.1:
test b[ax0], b[ax0]
cretz
inc rax
inc ax0
loop .1
.2:
ret