quine.S

global _start
msg: db "global _start",10,"msg: db |",10,"newline_seq: db 34, 44, 49, 48, 44, 34, 0",10,"end_seq: db 34, 44, 48, 0",10,"ft_putchar_real:		; recieves a str ptr, in rsi, only prints the first char",10,"    mov rax, 1          ; write syscall",10,"    mov rdi, 1          ; fd 1",10,"	mov rdx, 1			; 1 byte",10,"    syscall             ",10,"	ret",10,"_start:",10,"	mov rsi, msg",10,"	call putstr			; Call the main function, then exit",10,"	mov rax, 60         ; exit syscall",10,"	mov rdi, 0			; status 0",10,"    syscall",10,"putstr:; gets input from rsi",10,"	cmp byte [rsi], 124 	; if is a pipe symbol",10,"	jne skip 				; start of print_escaped",10,"		push rsi 			; save rsi",10,"		mov rsi, end_seq	; use the first char of that string",10,"		call ft_putchar_real; print one semi colon",10,"		mov rsi, msg		; start printing the formatted str",10,"	loop2:",10,"		cmp byte [rsi], 10",10,"		jne skip_format_newline ; if newline",10,"			push rsi",10,"			mov rsi, newline_seq",10,"			call putstr",10,"			pop rsi",10,"			jmp skip_print2",10,"		skip_format_newline:		; else",10,"			call ft_putchar_real	; print normal char",10,"		skip_print2:",10,"			inc rsi			  		; str++",10,"			cmp byte [rsi], 0   	",10,"			jne loop2				; if *str == 0",10,"				mov rsi, end_seq	; we don't care about this rsi anymore",10,"				call putstr",10,"				pop rsi",10,"				jmp skip_print		; end of print_escaped",10,"skip:								; print normal char",10,"	call ft_putchar_real  	; ft_putchar (str)",10,"skip_print:",10,"	inc rsi					; str++",10,"	cmp byte [rsi], 0		",10,"	jne putstr				; if *str == 0",10,"		ret",10,"",0
newline_seq: db 34, 44, 49, 48, 44, 34, 0
end_seq: db 34, 44, 48, 0
ft_putchar_real:		; recieves a str ptr, in rsi, only prints the first char
    mov rax, 1          ; write syscall
    mov rdi, 1          ; fd 1
	mov rdx, 1			; 1 byte
    syscall             
	ret
_start:
	mov rsi, msg
	call putstr			; Call the main function, then exit
	mov rax, 60         ; exit syscall
	mov rdi, 0			; status 0
    syscall
putstr:; gets input from rsi
	cmp byte [rsi], 124 	; if is a pipe symbol
	jne skip 				; start of print_escaped
		push rsi 			; save rsi
		mov rsi, end_seq	; use the first char of that string
		call ft_putchar_real; print one semi colon
		mov rsi, msg		; start printing the formatted str
	loop2:
		cmp byte [rsi], 10
		jne skip_format_newline ; if newline
			push rsi
			mov rsi, newline_seq
			call putstr
			pop rsi
			jmp skip_print2
		skip_format_newline:		; else
			call ft_putchar_real	; print normal char
		skip_print2:
			inc rsi			  		; str++
			cmp byte [rsi], 0   	
			jne loop2				; if *str == 0
				mov rsi, end_seq	; we don't care about this rsi anymore
				call putstr
				pop rsi
				jmp skip_print		; end of print_escaped
skip:								; print normal char
	call ft_putchar_real  	; ft_putchar (str)
skip_print:
	inc rsi					; str++
	cmp byte [rsi], 0		
	jne putstr				; if *str == 0
		ret