/**
 * Print a string to stdout.
 */
 
.data
space:	.ascii " "
nl:	.ascii "\n"

.text
.global _start

/**
 * Compute length of given string.
 * @param ESI String to compute length for.
 * @return Length of the string in EAX
 */
strlen:
	pushl	%ebx
	pushl	%esi
	xor	%eax, %eax
	
loop_strlen:
	movb	(%esi), %bl
	cmp	$0, %bl
	je	end_strlen
	inc	%eax
	inc	%esi
	jmp	loop_strlen
	
end_strlen:
	popl	%esi
	popl	%ebx
	ret

_start:
	/* Clear registers. */
	xor	%eax, %eax
	xor	%ebx, %ebx

	/* Fetch argc, argv. */
	popl	%edi
	dec	%edi
	popl	%esi
	
loop_argv:
	/* while (i < argc) */	
	cmp	$0x0, %edi
	jle	term
	dec	%edi
	
	/* char *str = argv[i] */
	popl	%esi
	xor	%ebx, %ebx
	
	/* int len = strlen(str) */
	call	strlen
	
	/* write (stdout, str, len) */
	movl	%eax, %edx
	movl	%esi, %ecx
	movl	$1, %ebx
	movl	$4, %eax
	int	$0x80
	
	/* write (stdout, space, 1) */
	movl	$1, %edx
	movl	$space, %ecx
	movl	$1, %ebx
	movl	$4, %eax
	int	$0x80
	
	/* Next argument. */
	jmp	loop_argv
	
term:
	/* write (stdout, "\n", 1) */
	movl	$1, %edx
	movl	$nl, %ecx
	movl	$1, %ebx
	movl	$4, %eax
	int	$0x80

	/* exit(0) */
	movl	$1, %eax
	xor	%ebx, %ebx
	int	$0x80