move into src/ and provide shell files to set the right input properties

1 files changed, 114 insertions, 0 deletions

diff --git a/src/utils.asm b/src/utils.asm
new file mode 100644
index 0000000..9281ed2
--- /dev/null
+++ b/src/utils.asm
@@ -0,0 +1,114 @@
+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
+