shit poop 123

main.asm

@@ -0,0 +1,136 @@
+%DEFINE SC_READ 0
+%DEFINE SC_WRITE 1
+%DEFINE SC_IOCTL 16
+%DEFINE SC_EXIT 60
+
+%DEFINE STDIN 0
+%DEFINE STDOUT 1
+%DEFINE TCGETS 0x5401
+%DEFINE TCSETS 0x5402
+
+SECTION .data
+	BUF TIMES 524288 DB 0 ; this should be enough ig
+	CLEAR_SEQ DB 0X1B, "[2J", 0x1B, "[H", 0
+	POS DQ 0
+	CHAR DB 0
+	
+SECTION .bss
+	TERMIOS_OLD RESB 60
+	TERMIOS_NEW RESB 60
+
+SECTION .text
+	GLOBAL _start
+
+_start:
+	CALL TERM_SAVE
+	CALL TERM_RAW
+
+	JMP LOOP
+   
+CLEAR_SCR:
+	MOV RAX, SC_WRITE
+	MOV RDI, STDOUT
+	MOV RSI, CLEAR_SEQ
+	MOV RDX, 7
+	SYSCALL
+	
+	RET
+	
+READ_CHAR:
+	MOV RAX, SC_READ
+	MOV RDI, STDIN
+	MOV RSI, CHAR
+	MOV RDX, 1
+	SYSCALL
+	
+	RET
+
+LOOP:
+	CALL READ_CHAR
+	
+	CMP [CHAR], 127
+	JE BACKSPACE
+	
+	; future...
+	; CMP [CHAR], 27
+	; JE ESCAPE
+	
+	MOV R14, [POS]
+	MOV R15, [CHAR]
+	MOV [BUF + R14], R15
+	INC R14
+	MOV [POS], R14
+	
+	CALL CLEAR_SCR
+	CALL PRINT_BUF
+	
+	JMP LOOP
+	
+BACKSPACE:
+	CMP QWORD [POS], 0
+	JE LOOP
+	
+	DEC QWORD [POS]
+	MOV R14, [POS]
+	MOV BYTE [BUF + R14], 0
+	
+	CALL CLEAR_SCR
+	CALL PRINT_BUF
+	
+	JMP LOOP
+	
+ESCAPE:
+	CALL READ_CHAR
+	CMP [CHAR], 91
+	JE ESCAPE_SEQ
+	
+	JMP LOOP
+	
+ESCAPE_SEQ:
+	CALL READ_CHAR
+	CMP [CHAR], 68
+	JE LEFT
+	
+LEFT:
+	; here is the text of left thing
+
+PRINT_BUF:
+	MOV RAX, SC_WRITE
+	MOV RDI, STDOUT
+	MOV RSI, BUF
+	MOV RDX, [POS]
+	SYSCALL
+	
+	RET
+	
+TERM_SAVE:
+	MOV RAX, SC_IOCTL
+	MOV RDI, STDIN
+	MOV RSI, TCGETS
+	MOV RDX, TERMIOS_OLD
+	SYSCALL
+	RET
+	
+TERM_RAW:
+	MOV RSI, TERMIOS_OLD
+	MOV RDI, TERMIOS_NEW
+	MOV RCX, 48
+	REP MOVSB
+	
+	MOV RDI, TERMIOS_NEW
+	AND DWORD [RDI + 12], ~(0x0002 | 0x0008)
+	
+	MOV RAX, SC_IOCTL
+	MOV RDI, STDIN
+	MOV RSI, TCSETS
+	MOV RDX, TERMIOS_NEW
+	SYSCALL
+	RET
+	
+TERM_REST:
+	MOV RAX, SC_IOCTL
+	MOV RDI, STDIN
+	MOV RSI, TCSETS
+	MOV RDX, TERMIOS_OLD
+	SYSCALL
+	RET