#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);
}