From a6a7debf2e0aa0d7f4f416c6a59f9e1cec5ecc45 Mon Sep 17 00:00:00 2001
From: PoliEcho <PoliEcho@pupes.org>
Date: Sun, 13 Jul 2025 20:23:19 +0200
Subject: [PATCH] break tty while trining to fix tty

---
 src/input.asm | 40 ++++++++++++++++++++++++++++++++++++----
 src/main.asm  | 48 ++++++++++++++++++++++++++++++++++++++++++++++--
 2 files changed, 82 insertions(+), 6 deletions(-)

diff --git a/src/input.asm b/src/input.asm
index 4ef712f..ecef6e7 100644
--- a/src/input.asm
+++ b/src/input.asm
@@ -12,6 +12,8 @@ section .bss
 	extern gameboard_ptr
 
 	extern simulation_running
+
+	extern running_in_tty
 section .data 
 	cursor_rows: dw 1
 	cursor_cols: dw 1
@@ -64,17 +66,47 @@ handle_user_input:; main loop of the program
 	xor rax, rax
 	mov qword [r12], rax; zeroout the buffer
 
+	movss xmm0, [speed_multiplier]
+	movss xmm1, [simulation_speed]
+	mulss xmm0, xmm1; callculate sleep lenght
+	cvttss2si rdx, xmm0; truncate and copy to rdx 
+
+	mov byte al, [running_in_tty]
+	test al, al; test if we are running in tty
+	jz .pts
+	
+	mov rax, rdx
+	xor rdx, rdx
+	mov rcx, 1000; convert miliseconds to seconds
+	div rcx
+
+	mov qword [r12], rax; store seconds
+
+	mov rax, rdx
+	xor rdx, rdx
+	mov rcx, 1000000
+	mul rcx
+
+	mov qword [r12+8], rax; store nanoseconds
+	mov rax, SYS_NANOSLEEP
+	mov rdi, r12
+	xor rsi, rsi; ignore some remaining time or something
+	syscall
+	
+	mov rax, 1; simulate sys_poll output
+	jmp .end_input_handling
+
+	.pts:
 	mov rax, SYS_POLL
 	mov dword [r12], STDIN; create pollfd struct
 	mov word [r12+4], POLLIN
 	mov rdi, r12
 	mov rsi, 1; only one file descriptor is provided
-	movss xmm0, [speed_multiplier]
-	movss xmm1, [simulation_speed]
-	mulss xmm0, xmm1; callculate sleep lenght
-	cvttss2si rdx, xmm0; truncate and copy to rdx 
+	; rdi already set
 	syscall
 
+	.end_delay_handling:
+
 	test rax, rax; SYS_POLL returns 0 when no change happens within timeout
 	jz .no_input
 
diff --git a/src/main.asm b/src/main.asm
index a594e38..022a120 100644
--- a/src/main.asm
+++ b/src/main.asm
@@ -19,7 +19,9 @@ section .bss
 
 	extern cursor_rows
 	extern cursor_cols
-
+	
+	global running_in_tty
+	running_in_tty: RESB 1
 	
 section .rodata
 	extern resetLen
@@ -27,6 +29,8 @@ section .rodata
 	hide_cursor: db ESC_CHAR, "[?25l", 0
 	show_cursor: db ESC_CHAR, "[?25h", 0
 
+	help_text: db "asm-game-of-life [args]",0xA,"-h	display this help menu",0xA,"Controls:",0xA,"use arrow keys to move around",0xA,"ENTER to invert cell",0xA,"p     to START/STOP simulation",0xA,"k     to increase simulation speed",0xA,"j     to decrese simulation speed",0xA, 0
+
 section .text
 extern print_str
 extern unsigned_int_to_ascii
@@ -58,11 +62,50 @@ _start:
 
 	; handle args
 	pop rcx; get argc (number of arguments)
+	pop rax; get rid of program name arugument
 	cmp rcx, 1 
 	jle .no_arguments_provided
-	; TODO hanndle arguments
+	dec rcx
+	.handle_arg:
+	pop rax
+	mov word di, [rax]
+
+	cmp di, 0x682D; check if -h was passed
+	jne .next_arg
+	lea rdi, [help_text]
+	call print_str
+	jmp .exit_program
+
+	.next_arg:
+	dec rcx
+	test rcx, rcx
+	jnz .handle_arg
+	
 	.no_arguments_provided:
 
+	
+	pop rax; get rid of null termination of argv 
+	; handle enviroment vars
+
+	.handle_env:
+	pop rax
+	test rax, rax; test if we reached end of envs
+	jz .no_envs
+
+	mov dword edi, [rax]
+	cmp edi, 0x4D524554; check for "TERM" inverted becose endiannes
+	jne .handle_env
+	mov qword rdi, [rax+5]; remove the TERM= part this should never segfault since there sould allwas be other data behind enviroment vars and i dont mind garbage 
+	mov rsi, 0xffffffffff
+	and rdi, rsi
+	mov rsi, 0x78756e696c
+	cmp rdi, rsi; check for "linux"
+	jne .no_envs
+	mov byte [running_in_tty], 1
+
+	.no_envs:
+
+
 	call init_alloc
 
 	xor rax, rax
@@ -104,6 +147,7 @@ _start:
 	lea rdi, [show_cursor]
 	call print_str
 
+	.exit_program:
 	mov rax, SYS_EXIT
     	mov rdi, 0             ; return code
     	syscall