zombie-core-utils/monkie/strnum.asm

extern puts

%include "../inc/length_func.inc"

section .data
	text db "42",0
section .text
	global main

main:
	sub   rsp, 8


	mov rdi, text
	call length_func
	mov r9, rax
	mov r11, r9

	mov r8, text

	xor r10, r10
	xor r11, r11
_loop:
	mov r10, [r8] 
	cmp r10, 0
	jz _exitloop		;if its zero we have reached the end of the string


	mov r10, [r8]
	sub r10, 48	; change "0" into 0
	mov [r8], r10


	add r8, 1
	jmp _loop


	xor rcx, rcx
	add rcx, 1
_exitloop:
	cmp r9, r8
	je _addvalues

	

	mov r10, r9

	mov rax, r10
	mul rcx
	mov r10, rax
	
	mov [r9], r10
	
	sub r9, 1

	mov rdi, 10
	mov rax, rcx
	mul rdi
	mov rcx, rax
	
	jmp _exitloop

	add r9, 1
_addvalues:
    	cmp r9, r11
    	je _end


	mov r10, [r8]
    	mov r11, [r9]
	add r11, r10
	mov [r9], r11

	

	add r8, 1
	add r9, 1

	jmp _addvalues
	;this returns the r8 pointer



	;mov rdi, text
	;cld
	;call puts	;this is the put s way of printing a string

_end:
	add rsp, 8
	ret
	
;	mov rax, 60		; exit
;	mov edi, 1 		; error 1 dont need the exit anymore beacue libc or somthing
;	syscall