extern libz_strlen

global libz_atoi

section .text

libz_atoi:

	mov r8, rdi

	xor r9, r9

_loopasd23:

	mov r9b, [r8]
	
	cmp r9, 0 	;check and see if we have reached the end of the string
	jz _exitloopasd12

	sub r9, 48

	mov [r8], r9b
	inc r8
	jmp _loopasd23

_exitloopasd12:

	

	call libz_strlen
	mov r8, rax
	mov r11, rax
	
	add r8, rdi

	dec r8
	push r8
	inc r8


	mov rcx, 1
_loop2asd12:
	dec r8
	mov al, [r8]


	mul rcx
	mov [r8], al

	
	mov rax, rcx
	mov r10, 10
	mul r10
	mov rcx, rax
	
	cmp r8, rdi
	je _exitloop2asd12
	jmp _loop2asd12
_exitloop2asd12:

	mov r8, rdi
	mov r9, rdi
	inc r9

_loop3asd12:

	mov r11b, [r9]
	mov r10b, [r8]
	cmp r11, 0
	jz _endasdasd23123

	add r11, r10

	mov [r9], r11b
	mov [r8], r10b


	inc r8
	inc r9

	jmp _loop3asd12

	
_endasdasd23123:
	pop r8
    	mov rax, [r8]
	ret