From a6d815eff457cdc779932b2a53d6ad518ae8c1bc Mon Sep 17 00:00:00 2001
From: Preston Pan <preston@nullring.xyz>
Date: Mon, 6 Feb 2023 13:43:46 -0800
Subject: parse more flags

---
 snake.c | 31 +++++++++++++++++++++++++++----
 1 file changed, 27 insertions(+), 4 deletions(-)

diff --git a/snake.c b/snake.c
index e87660e..a46e0eb 100644
--- a/snake.c
+++ b/snake.c
@@ -15,10 +15,10 @@
 
 /*** GLOBAL VARIABLES ***/
 volatile sig_atomic_t intCtrlC = 0; /* flag for ctrl-c interrupt */
+int speed = 1;
 int score = 0;
 int boardSize = 15;
 int updateInterval = 300000000L;
-
 vectorp_t snakePositions; 
 vector_t foodPos;
 vector_t lastMoveDir;
@@ -33,18 +33,41 @@ void interrupt_handler(int sig) {
 
 int main(int argc, char **argv) {
 	/* parsing arguments */
-	if(argc > 1) {
-		if(strcmp("--version", argv[1]) == 0) {
+	char *last_flag;
+	int was_flag = 0;
+	for (int i = 1; i < argc; i ++) {
+		if(strcmp("--version", argv[i]) == 0) {
 			printf("snake3, version 1.0\n");
 			printf("Copyright 2023 Kai Stevenson\n");
 			printf("This software was licensed under the MIT license;\n");
 			printf("for more information, see the license file.\n");
 			return 0;
 		}
-		else if(strcmp("--help", argv[1]) == 0) {
+		else if(strcmp("--help", argv[i]) == 0) {
 			printf("usage: snake3 [--version] [--help]\n");
 			return 0;
 		}
+		else if (strcmp("--size", argv[i]) == 0 || strcmp("--speed", argv[i]) == 0) {
+			last_flag = argv[i];
+			was_flag = 1;
+		}
+		else if (was_flag) {
+			if (strcmp("--size", last_flag) == 0) {
+				boardSize = atoi(argv[i]);
+				if (boardSize < 3) {
+					fprintf(stderr, "%sboard size too small or argument invalid, please try again.%s\n", RED, COLOR_RESET);
+					exit(1);
+				}
+			}
+			else if (strcmp("speed", last_flag) == 0) {
+				speed = atoi(argv[i]);
+				if (speed <= 0) {
+					fprintf(stderr, "%sspeed level must be greater than zero and integer. Please try again.%s\n", RED, COLOR_RESET);
+					exit(1);
+				}
+			}
+			was_flag = 0;
+		}
 		else {
 			printf("usage: snake3 [--version] [--help]\n");
 			return 1;
-- 
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