add user input handling
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@ -9,7 +9,8 @@ section .bss
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extern term_cols
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extern gameboard_size
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global simulation_running
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simulation_running: RESB 1
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section .rodata
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@ -20,8 +21,8 @@ section .rodata
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home_cursor: db ESC_CHAR, "[H", 0
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statusbar: db ESC_CHAR, "[30;100m", "Use arrow keys to move cursor, enter to invert cell h/j to change simulation speed, p to simulation", 0
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START_STOP_pos: equ $-statusbar-16
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statusbar: db ESC_CHAR, "[30;100m", "Use arrow keys to move cursor, enter to invert cell j/k to change simulation speed, p to simulation", 0
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START_STOP_pos: equ $-statusbar-17
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start_str: db "START", 0
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@ -68,8 +69,24 @@ global print_game_ui
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print_game_ui:
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lea rdi, [home_cursor]
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call print_str
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mov qword rdi, [gameboard_ptr]
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push rdi
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add rdi, [gameboard_size]
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sub di, [term_cols]
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add rdi, START_STOP_pos
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mov cl, [simulation_running]
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test cl,cl; test if simulation is running
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jz .simulation_not_running
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lea rsi, [stop_str]
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jmp .end_simulation_running_check
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.simulation_not_running:
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lea rsi, [start_str]
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.end_simulation_running_check:
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call string_copy
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pop rdi
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call print_str
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135
src/input.asm
135
src/input.asm
@ -1,12 +1,141 @@
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%include "symbols.asm"
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section .bss
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cursor_rows: RESW 1
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cursor_rows: RESW 1; TODO DONT FORGET TO INICIALIZE
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cursor_cols: RESW 1
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extern multipurpuse_buf
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extern term_rows
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extern term_cols
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extern gameboard_ptr
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extern simulation_running
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section .rodata
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cursor_up: db ESC_CHAR, "[1A", 0
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cursor_down: db ESC_CHAR, "[1B", 0
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cursor_right: db ESC_CHAR, "[1C", 0
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cursor_left: db ESC_CHAR, "[1D", 0
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arrow_switch_statement:
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dq handle_user_input.arrow_up
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dq handle_user_input.arrow_down
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dq handle_user_input.arrow_right
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dq handle_user_input.arrow_left
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section .text
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global handle_user_input
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handle_user_input:
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extern print_str
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global handle_user_input
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handle_user_input:; main loop of the program
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.main_loop:
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xor rax, rax
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mov qword [multipurpuse_buf], rax; zeroout the buffer
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mov rax, SYS_POLL
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mov rdi, STDIN
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mov rsi, 1; only one file descriptor is provided
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mov rdx, 0; no timeout. maybe use this for final sleep but run if user inputs something TODO
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syscall
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test rax, rax; SYS_POLL returns 0 when no change happens within timeout
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jz .no_input
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mov rax, SYS_READ
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mov rdi, STDIN
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lea rsi, [multipurpuse_buf]
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mov rdx, 8; size of multipurpuse buffer
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syscall; read user input
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mov rax, [multipurpuse_buf]
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shr rax, 5; we need only 3 bytes for this inpus sceame
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cmp eax, 0x001B5B44; check if input is more than left arrow
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ja .handle_single_byte_chars
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sub eax, 0x1B5B41
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jmp [arrow_switch_statement+(rax*8)]; lets hope this works
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.arrow_up:
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dec word [cursor_rows]
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lea rdi, [cursor_up]
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call print_str
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jmp .no_input
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.arrow_down:
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inc word [cursor_rows]
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lea rdi, [cursor_down]
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call print_str
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jmp .no_input
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.arrow_right:
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inc word [cursor_cols]
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lea rdi, [cursor_right]
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call print_str
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jmp .no_input
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.arrow_left:
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dec word [cursor_cols]
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lea rdi, [cursor_left]
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call print_str
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jmp .no_input
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.handle_single_byte_chars:
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shr eax, 2; get the char to al
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cmp al, 0xa; NEWLINE (enter key)
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jne .check_p
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xor rax, rax; zeroout rax
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mov ax, [cursor_rows]
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mul dword [term_cols]
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add rax, [cursor_cols]
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lea rdi, [gameboard_ptr+rax]
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mov cl, [rdi]
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cmp cl, '#'
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je .hashtag_present
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mov byte [rdi], '#'
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jmp .no_input
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.hashtag_present:
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mov byte [rdi], ' '
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jmp .no_input
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.check_p:
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cmp al, 'p'
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jne .check_j
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xor byte [simulation_running], 0x01; switch simulation on or off
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jmp .no_input
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.check_j:
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cmp al, 'j'
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jne .check_k
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; TODO implement simulation speed
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jmp .no_input
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.check_k:
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cmp al, 'k'
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jne .no_input
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; TODO implement simulation speed
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.no_input:
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jmp .main_loop
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ret
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@ -3,6 +3,7 @@
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section .bss
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global multipurpuse_buf
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multipurpuse_buf: RESB 8
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global term_rows
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@ -72,6 +73,13 @@ _start:
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mov [gameboard_ptr], rax; stores pointer to gameboard array
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call init_gameboard
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; make stdin non-blocking in case polling somehow fails, or am i stupid
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mov rax, SYS_FCNTL
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mov rdi, STDIN
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mov rsi, F_SETFL
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mov rdx, O_NONBLOCK
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syscall
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call print_game_ui
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@ -1,10 +1,18 @@
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SYS_EXIT equ 60
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SYS_IOCTL equ 16
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SYS_READ equ 0
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SYS_WRITE equ 1
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SYS_BRK equ 12
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SYS_FCNTL equ 72
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SYS_POLL equ 7
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STDIN equ 0
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STDOUT equ 1
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TIOCGWINSZ equ 0x5413
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POLLIN equ 1
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F_SETFL equ 4
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O_NONBLOCK equ 2048
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ASCII_ZERO equ 48
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ESC_CHAR equ 27
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