zobrist hashing

src/common/preCodeGen/util.c

@@ -0,0 +1,22 @@
+#include <stdint.h>
+#include <stdlib.h>
+#include <chess/util.h>
+
+uint_least64_t rand_64() {
+	uint_least64_t u1, u2, u3, u4;
+  u1 = (uint_least64_t)(rand()) & 0xFFFF; u2 = (uint_least64_t)(rand()) & 0xFFFF;
+  u3 = (uint_least64_t)(rand()) & 0xFFFF; u4 = (uint_least64_t)(rand()) & 0xFFFF;
+  return u1 | (u2 << 16) | (u3 << 32) | (u4 << 48);
+}
+
+uint_least64_t zobristPieceI(struct piece_t piece, uint_least8_t field) {
+	return field * 2 * PIECES_LENGTH + piece.color * PIECES_LENGTH + piece.type;
+}
+
+uint_least8_t getFile(const uint_least8_t field) {
+	return field % BOARD_SIZE;
+}
+
+uint_least8_t getRank(const uint_least8_t field) {
+	return field / BOARD_SIZE;
+}