add license information & rename typedefs

src/piece.h

@@ -1,15 +1,29 @@
+/* piece.h - piece definitions.
+ *
+ * Copyright (C) 2021 Bruno Raoult ("br")
+ * Licensed under the GNU General Public License v3.0 or later.
+ * Some rights reserved. See COPYING.
+ *
+ * You should have received a copy of the GNU General Public License along with this
+ * program. If not, see <https://www.gnu.org/licenses/gpl-3.0-standalone.htmlL>.
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later <https://spdx.org/licenses/GPL-3.0-or-later.html>
+ *
+ */
+
 #ifndef PIECE_H
 #define PIECE_H
 
 #include "chessdefs.h"
 #include "board.h"
+#include "list.h"
 
 typedef struct piece {
-    short piece;
-    short color;
-    SQUARE square;
+    piece_t piece;
+    square_t square;
     short castle;
-    float value;
-} PIECE, PLAYER_PIECES[16];
+    int64_t value;
+    struct list_head list;
+} piece_list_t;
 
 #endif