zobrist hashing

src/common/postCodeGen/magic.c

@@ -0,0 +1,24 @@
+#include <stdint.h>
+#include <chess/types.h>
+#include <chess/generated/moveConsts.h>
+#include <chess/bitset.h>
+
+uint_least64_t slidingMovementMask(const uint_least8_t *direction, uint_least8_t directionLength,
+		uint_least8_t field, uint_least64_t blockMask) {
+	defineDirectionOffset;
+	const uint_least8_t *localDirectionOffset = DIRECTION_OFFSET + field * DIRECTION_LENGTH;
+	uint_least64_t movementMask = 0;
+	for(uint_least8_t j = 0; j < directionLength; ++j) {
+		const int_least8_t modifier = DIRECTION_MODIFIER[direction[j]];
+		for(uint_least8_t currentField = field + modifier, i = 0;
+				i < localDirectionOffset[direction[j]]; ++i, currentField += modifier) {
+			movementMask = bitsetSet(movementMask, currentField);
+			if(bitsetGet(blockMask, currentField)) break;
+		}
+	}
+	return movementMask;
+}
+
+uint_least64_t* getMagicAttackPtr(const uint_least64_t mask, const struct magic_t magic) {
+	return magic.attackTable + ((mask * magic.magicNumber) >> magic.shift);
+}