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section .data
; escape code for clearing the screen
clear db 0x1B, '[2J', 0x1B, '[H', 0
clear_len equ $ - clear
; cursor management
reset_cursor_code db 0x1B , '[H', 0
reset_cursor_len equ $ - reset_cursor_code
bottom_cursor db 0x1B , '[B', 0
bottom_cursor_len equ $ - bottom_cursor
right_cursor db 0x1B , '[C', 0
right_cursor_len equ $ - right_cursor
hide_cursor_code db 0x1B, '[', '?', '2', '5', 'l', 0 ; Escape sequence to hide the cursor
show_cursor_code db 0x1B, '[', '?', '2', '5', 'h', 0 ; Escape sequence to show the cursor
section .bss
; adress for syscall for write_byte wrapper
byte_to_write resb 1
section .text
global write_byte
global clear_screen
global move_cursor_right
global move_cursor_down
global reset_cursor
global hide_cursor
global show_cursor
hide_cursor:
push rdi
mov rax, 1
mov rdi, 1
mov rsi, hide_cursor_code
mov rdx, 6
syscall
pop rdi
ret
show_cursor:
push rdi
mov rax, 1
mov rdi, 1
mov rsi, show_cursor_code
mov rdx, 6
syscall
pop rdi
ret
reset_cursor:
push rdi
mov rax, 1
mov rdi, 1
mov rsi, reset_cursor_code
mov rdx, reset_cursor_len
syscall
pop rdi
ret
move_cursor_right:
push rdi
mov rax, 1
mov rdi, 1
mov rsi, right_cursor
mov rdx, right_cursor_len
syscall
pop rdi
ret
move_cursor_down:
push rdi
mov rax, 1
mov rdi, 1
mov rsi, bottom_cursor
mov rdx, bottom_cursor_len
syscall
pop rdi
ret
write_byte:
push rdi
mov byte [byte_to_write], al
mov rax, 1
mov rdi, 1
mov rsi, byte_to_write
mov rdx, 1
syscall
pop rdi
ret
clear_screen:
push rdi
mov rax, 1
mov rdi, 1
mov rsi, clear
mov rdx, clear_len
syscall
pop rdi
ret
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