;

src/main.c

@@ -1,24 +1,25 @@
-#include <string.h>
 #include <termios.h>
-#include <time.h>
 #include <unistd.h>
 
 const char p1 = 'x', p2 = 'o';
 char temp = 'x';
-char buf[9] = { "         " };
-static const unsigned char wins[8][3] = { { 0, 1, 2 }, { 3, 4, 5 }, { 6, 7, 8 },
-					  { 0, 3, 6 }, { 1, 4, 7 }, { 2, 5, 8 },
-					  { 0, 4, 8 }, { 2, 4, 6 } };
+char buf[9] = { ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ' };
 
-int
-check_line(const char id)
-{
-	for (int i = 0; i < sizeof(wins) / sizeof(wins[0]); i++)
-	{
-		if ((buf[wins[i][0]] == id && buf[wins[i][1]] == id &&
-		     buf[wins[i][2]] == id))
-		{
-			return 1;
+int check_line(const char id) {
+    unsigned int player_mask = 0;
+    for (int i = 0; i < 9; i++) {
+        if (buf[i] == id) {
+            player_mask |= (1 << i); // This "turns on" the i-th bit
+        }
+    }
+    static const int win_patterns[8] = {
+        7, 56, 448,    // Rows: 0-1-2, 3-4-5, 6-7-8
+        73, 146, 292,  // Cols: 0-3-6, 1-4-7, 2-5-8
+        273, 84        // Diagonals: 0-4-8, 2-4-6
+    };
+    for (int i = 0; i < 8; i++) {
+        if ((player_mask & win_patterns[i]) == win_patterns[i]) {
+            return 1; // Win found!
         }
     }
     return 0;
@@ -95,7 +96,7 @@ end:
 
 	char dummy;
 	read(STDIN_FILENO, &dummy, 1);
-	write(1, "\033[?25h", 5);
+	write(1, "\033[?25h", 6);
 	tcsetattr(STDIN_FILENO, TCSANOW, &oldt);
 	return 0;
 }