From 9e791e4e927b837c8647765ada6f25be1ac086cc Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ra=C3=BAl=20Benencia?= <rul@kalgan.cc>
Date: Tue, 31 Mar 2015 15:45:21 -0300
Subject: introduce game loop function

---
 Makefile       |  4 ++--
 include/game.h | 11 +++++++++++
 lib/game.c     | 36 ++++++++++++++++++++++++++++++++++++
 3 files changed, 49 insertions(+), 2 deletions(-)
 create mode 100644 include/game.h
 create mode 100644 lib/game.c

diff --git a/Makefile b/Makefile
index 6543609..59ff03b 100644
--- a/Makefile
+++ b/Makefile
@@ -2,8 +2,8 @@ CC     = gcc
 CFLAGS = -Wall -Iinclude/
 OUTPUT = main
 MAIN   = main.c
-DEPS   = include/types.h include/board.h include/print.h include/piece.h include/coordinate.h include/move.h include/input.h
-OBJ    = lib/board.o lib/print.o lib/piece.o lib/coordinate.o lib/move.o lib/input.o
+DEPS   = include/types.h include/board.h include/print.h include/piece.h include/coordinate.h include/move.h include/input.h include/game.h
+OBJ    = lib/board.o lib/print.o lib/piece.o lib/coordinate.o lib/move.o lib/input.o lib/game.o
 
 %.o: %.c $(DEPS)
 	$(CC) -c -o $@ $< $(CFLAGS)
diff --git a/include/game.h b/include/game.h
new file mode 100644
index 0000000..61239e7
--- /dev/null
+++ b/include/game.h
@@ -0,0 +1,11 @@
+#ifndef _GAME
+#define _GAME
+
+#include "types.h"
+
+/*
+ * Implements the main game loop. Returns the final state of the board.
+ */
+Board game_loop(Board);
+
+#endif
diff --git a/lib/game.c b/lib/game.c
new file mode 100644
index 0000000..6fcc0c5
--- /dev/null
+++ b/lib/game.c
@@ -0,0 +1,36 @@
+#include <stdio.h>
+
+#include "board.h"
+#include "game.h"
+#include "input.h"
+#include "move.h"
+#include "print.h"
+
+static Color _toggle_current_player(Color c) {
+    if (c == WHITE)
+        return BLACK;
+    else
+        return WHITE;
+}
+
+Board game_loop(Board board) {
+    Board b = board;
+    Color current_player = WHITE;
+    Coord orig, dest;
+
+    while (1) {
+        print_board(b, current_player);
+
+        putchar('\n');
+        if (current_player == WHITE)
+            printf("White's turn. \n");
+        else
+            printf("Black's turn. \n");
+
+        orig = input_orig_coord();
+        dest = input_dest_coord();
+
+        b = board_make_move(b, move_init(orig, dest));
+        current_player = _toggle_current_player(current_player);
+    }
+}
-- 
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