From 3cc4d74b35601e2941b7ca66fde76ac03775cdb8 Mon Sep 17 00:00:00 2001
From: Kai Stevenson <kai@kaistevenson.com>
Date: Fri, 2 Dec 2022 14:20:14 -0800
Subject: added pawn capture

---
 chess.c | 36 ++++++++++++++++++++++++++++--------
 1 file changed, 28 insertions(+), 8 deletions(-)

diff --git a/chess.c b/chess.c
index 9cf9a76..c8de4fc 100644
--- a/chess.c
+++ b/chess.c
@@ -97,43 +97,63 @@ int in_board(vector_t position) {
 int is_empty(int board[8][8], vector_t position) {
 	return board[position.mx][position.my] == 0;
 }
-int get_owner(int board[8][8], vector_t position) {
-
+int is_white(int board[8][8], vector_t position) {
+	return board[position.mx][position.my] >= 1 && board[position.mx][position.my] <= 6;
+}
+int is_black(int board[8][8], vector_t position) {
+	return board[position.mx][position.my] >= 7;
 }
-int 
 vectorp_t get_moves(int board[8][8], vector_t position, piece_t piece) {
 	vector_t* moves = malloc(27 * sizeof(vector_t));
 	int moveCount = 0;
 	if(piece == pawn) {
 		vector_t move1 = init_vector(position.mx, position.my - 1);
 		if(in_board(move1) && is_empty(board, move1)) {
-			moves[0] = move1;
+			moves[moveCount] = move1;
 			moveCount++;
 			if(position.my == 6) {
 				vector_t move2 = init_vector(position.mx, position.my - 2);
 				if(is_empty(board, move2)) {
-					moves[1] = move2;
+					moves[moveCount] = move2;
 					moveCount++;
 				}
 			}
 		}
 		vector_t captureL = init_vector(position.mx - 1, position.my - 1);
-		if(in_board(captureL) && 
+		if(in_board(captureL) && is_black(board, captureL)) {
+			moves[moveCount] = captureL;
+			moveCount++;
+		}
+		vector_t captureR = init_vector(position.mx + 1, position.my - 1);
+		if(in_board(captureR) && is_black(board, captureR)) {
+			moves[moveCount] = captureR;
+			moveCount++;
+		}
 		return init_vectorp(moves, moveCount);
 	}
 	else if(piece == pawn + 6) {
 		vector_t move1 = init_vector(position.mx, position.my + 1);
 		if(in_board(move1) && is_empty(board, move1)) {
-			moves[0] = move1;
+			moves[moveCount] = move1;
 			moveCount++;
 			if(position.my == 1) {
 				vector_t move2 = init_vector(position.mx, position.my + 2);
 				if(is_empty(board, move2)) {
-					moves[1] = move2;
+					moves[moveCount] = move2;
 					moveCount++;
 				}
 			}
 		}
+		vector_t captureL = init_vector(position.mx - 1, position.my + 1);
+		if(in_board(captureL) && is_white(board, captureL)) {
+			moves[moveCount] = captureL;
+			moveCount++;
+		}
+		vector_t captureR = init_vector(position.mx + 1, position.my + 1);
+		if(in_board(captureR) && is_white(board, captureR)) {
+			moves[moveCount] = captureR;
+			moveCount++;
+		}
 		return init_vectorp(moves, moveCount);
 	}
 }
-- 
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