xscii/xscii.asm

EFFECT_NORMAL    = '0'
EFFECT_BOLD      = '1'
EFFECT_ITALIC    = '3'
EFFECT_UNDERLINE = '4'
EFFECT_BLINK     = '5'
EFFECT_REVERSE   = '7'
COLOUR_GREY      = '0'
COLOUR_RED       = '1'
COLOUR_GREEN     = '2'
COLOUR_YELLOW    = '3'
COLOUR_BLUE      = '4'
COLOUR_PINK      = '5'
COLOUR_CYAN      = '6'
COLOUR_WHITE     = '7'

macro output_number number, base, offset, character, colour, effect {
	call output_bar
	mov rbx, colour
	mov rbp, effect
	call output_colour
	mov rbx, number
	mov rbp, base
	call offset_base
	mov rbx, offset
	sub rbx, [output_length]
	mov rbp, character
	call output_align
	call output_base
	call output_cancel
}

macro output_string index, array, offset, colour, effect  {
	call output_bar
	mov rbx, colour
	mov rbp, effect
	call output_colour
	mov rax, index
	mov rbx, offset
	mul rbx
	mov rbx, array
	add rbx, rax
	mov rbp, offset
	call output_text
	call output_cancel
}

format ELF64 executable 3

segment readable executable

entry $
	main_loop:
		output_number [character_index],  2, 8, align_zero,  COLOUR_WHITE, EFFECT_NORMAL
		output_number [character_index],  8, 4, align_zero,  COLOUR_CYAN,  EFFECT_NORMAL
		output_number [character_index], 10, 4, align_space, COLOUR_CYAN,  EFFECT_ITALIC
		output_number [character_index], 16, 3, align_space, COLOUR_CYAN,  EFFECT_BOLD

		output_string [character_index], code_list,  3, COLOUR_BLUE, EFFECT_BOLD
		output_string [character_index], name_list, 24, COLOUR_PINK, EFFECT_NORMAL

		mov rax, [character_index]
		and rax, 1
		cmp rax, 0
		je skip_line
			mov rbx, align_line
			mov rbp, 1
			call output_text
		skip_line:

		inc [character_index]
	cmp [character_index], 128
	jne main_loop

	mov rdi, 0
	mov rax, 60
	syscall

output_text:
	mov rax, 1
	mov rdi, 1
	mov rsi, rbx
	mov rdx, rbp
	syscall
	ret

output_colour:
	mov [output_colour_format + 5], bl
	mov [output_colour_format + 2], bpl
	mov rbx, output_colour_format
	mov rbp, 7
	call output_text
	ret

output_cancel:
	mov rbx, output_colour_cancel
	mov rbp, 4
	call output_text
	ret

output_align:
	mov r15, rbx
	mov r14, rbp
	loop_statement:
		mov rbx, r14
		mov rbp, 1
		call output_text
		dec r15
	cmp r15, 0
	jne loop_statement
	ret

output_bar:
	mov rbx, COLOUR_GREY
	mov rbp, EFFECT_BOLD
	call output_colour
	mov rbx, align_bar
	mov rbp, 3
	call output_text
	call output_cancel
	ret

offset_base:
	mov ax, bx
	number_loop_statement:
		div bpl
		mov [output_quotient],  al
		mov [output_remainder], ah
		mov r14, output_format
		add r14, [output_length]
		mov r15, output_cypher
		add r15b, [output_remainder]
		mov r13b, BYTE [r15]
		mov BYTE [r14], r13b
		xor rax, rax
		mov al, [output_quotient]
		inc [output_length]
	cmp rax, 0
	jne number_loop_statement
	ret

output_base:
	output_loop_statement:
		mov rbx, output_format
		add rbx, [output_length]
		dec rbx
		mov rbp, 1
		call output_text
		dec [output_length]
	cmp [output_length], 0
	jne output_loop_statement
	ret

segment readable writable

character_index dq 0

align_zero  db '0'
align_line  db 10
align_space db ' '
align_bar   db ' | '

output_cypher    db '0123456789ABCDEF'
output_format    db '                '
output_length    dq 0
output_quotient  db 0
output_remainder db 0

output_colour_format db 27, '[ ;3 m'
output_colour_cancel db 27, '[0m'

code_list db 'NUL', 'SOH', 'STX', 'ETX', 'EOT', 'ENQ', 'ACK', 'BEL', 'BS ', 'HT ', 'LF ', 'VT ', 'FF ', 'CR ', 'SO ', 'SI ', \
             'DLE', 'DC1', 'DC2', 'DC3', 'DC4', 'NAK', 'SYN', 'ETB', 'CAN', 'EM ', 'SUB', 'ESC', 'FS ', 'GS ', 'RS ', 'US ', \
             '   ', '!  ', '"  ', '#  ', '$  ', '%  ', '&  ',39,'  ','(  ', ')  ', '*  ', '+  ', ',  ', '-  ', '.  ', '/  ', \
             '0  ', '1  ', '2  ', '3  ', '4  ', '5  ', '6  ', '7  ', '8  ', '9  ', ':  ', ';  ', '<  ', '=  ', '>  ', '?  ', \
             '@  ', 'A  ', 'B  ', 'C  ', 'D  ', 'E  ', 'F  ', 'G  ', 'H  ', 'I  ', 'J  ', 'K  ', 'L  ', 'M  ', 'N  ', 'O  ', \
             'P  ', 'Q  ', 'R  ', 'S  ', 'T  ', 'U  ', 'V  ', 'W  ', 'X  ', 'Y  ', 'Z  ', '[  ', '\  ', ']  ', '^  ', '_  ', \
             '`  ', 'a  ', 'b  ', 'c  ', 'd  ', 'e  ', 'f  ', 'g  ', 'h  ', 'i  ', 'j  ', 'k  ', 'l  ', 'm  ', 'n  ', 'o  ', \
             'p  ', 'q  ', 'r  ', 's  ', 't  ', 'u  ', 'v  ', 'w  ', 'x  ', 'y  ', 'z  ', '{  ', '|  ', '}  ', '~  ', 'DEL'

name_list db 'Null                    ', 'Start of heading        ', 'Start of text           ', 'End of text             ', \
             'End of transmission     ', 'Enquiry                 ', 'Acknowledge             ', 'Bell                    ', \
             'Backspace               ', 'Horizontal tab          ', 'Line feed               ', 'Vertical tab            ', \
             'Form feed               ', 'Carriage return         ', 'Shift out               ', 'Shift in                ', \
             'Data link escape        ', 'Device control 1        ', 'Device control 2        ', 'Device control 3        ', \
             'Device control 4        ', 'Negative acknowledge    ', 'Synchronous idle        ', 'End transmission block  ', \
             'Cancel                  ', 'End of medium           ', 'Substitute              ', 'Escape                  ', \
             'File separator          ', 'Group separator         ', 'Record separator        ', 'Unit separator          ', \
             'Space                   ', 'Exclamation mark        ', 'Speech mark             ', 'Number sign             ', \
             'Dollar sign             ', 'Percent                 ', 'Ampersand               ', 'Quote                   ', \
             'Open parenthesis        ', 'Close parenthesis       ', 'Asterisk                ', 'Plus                    ', \
             'Comma                   ', 'Minus                   ', 'Period                  ', 'Slash                   ', \
             'Zero                    ', 'One                     ', 'Two                     ', 'Three                   ', \
             'Four                    ', 'Five                    ', 'Six                     ', 'Seven                   ', \
             'Eight                   ', 'Nine                    ', 'Colon                   ', 'Semicolon               ', \
             'Open angled bracket     ', 'Equal                   ', 'Close angled bracket    ', 'Question mark           ', \
             'At sign                 ', 'Uppercase A             ', 'Uppercase B             ', 'Uppercase C             ', \
             'Uppercase D             ', 'Uppercase E             ', 'Uppercase F             ', 'Uppercase G             ', \
             'Uppercase H             ', 'Uppercase I             ', 'Uppercase J             ', 'Uppercase K             ', \
             'Uppercase L             ', 'Uppercase M             ', 'Uppercase N             ', 'Uppercase O             ', \
             'Uppercase P             ', 'Uppercase Q             ', 'Uppercase R             ', 'Uppercase S             ', \
             'Uppercase T             ', 'Uppercase U             ', 'Uppercase V             ', 'Uppercase W             ', \
             'Uppercase X             ', 'Uppercase Y             ', 'Uppercase Z             ', 'Opening bracket         ', \
             'Backslash               ', 'Closing bracket         ', 'Caret                   ', 'Underscore              ', \
             'Grave                   ', 'Lowercase a             ', 'Lowercase b             ', 'Lowercase c             ', \
             'Lowercase d             ', 'Lowercase e             ', 'Lowercase f             ', 'Lowercase g             ', \
             'Lowercase h             ', 'Lowercase i             ', 'Lowercase j             ', 'Lowercase k             ', \
             'Lowercase l             ', 'Lowercase m             ', 'Lowercase n             ', 'Lowercase o             ', \
             'Lowercase p             ', 'Lowercase q             ', 'Lowercase r             ', 'Lowercase s             ', \
             'Lowercase t             ', 'Lowercase u             ', 'Lowercase v             ', 'Lowercase w             ', \
             'Lowercase x             ', 'Lowercase y             ', 'Lowercase z             ', 'Opening brace           ', \
             'Vertical bar            ', 'Closing brace           ', 'Tilde                   ', 'Delete                  '