#include #include #include "core.h" #include "group.h" #include "absl/container/flat_hash_map.h" #include "common.h" #include "size.h" namespace klotski { using klotski::AllCases; using klotski::BasicRanges; using klotski::Common::check_range; using klotski::Common::range_reverse; std::vector Group::all_cases(uint32_t type_id) { auto tmp = block_num(type_id); std::vector ranges; // basic ranges of type_id BasicRanges::generate(ranges, BasicRanges::generate_t { // generate target ranges .n1 = 16 - tmp.n_1x1 - (tmp.n_1x2 + tmp.n_2x1) * 2, /// space -> 00 .n2 = tmp.n_1x2, /// 1x2 -> 01 .n3 = tmp.n_2x1, /// 2x1 -> 10 .n4 = tmp.n_1x1, /// 1x1 -> 11 }); for (auto &range : ranges) { range = range_reverse(range); // basic ranges reversed } std::vector all_cases; all_cases.reserve(GROUP_ALL_CASES_SIZE[type_id]); for (uint64_t head = 0; head < 15; ++head) { // address of 2x2 block /// head -> 0/1/2 / 4/5/6 / 8/9/10 / 12/13/14 if ((head & 0b11) == 0b11) { ++head; // skip invalid address } /// head(4-bit) + basic-range(32-bit) --check--> valid cases for (auto &&range : ranges) { if (!check_range(head, range)) { // case valid all_cases.emplace_back(CommonCode::unsafe_create( head << 32 | range_reverse(range) // release valid cases )); } } } return all_cases; } std::vector Group::group_cases(const RawCode &seed) { std::queue cache; absl::flat_hash_map cases; // cases.reserve(max_group_size(seed)); cases.emplace(seed.unwrap(), 0); // without mask cache.emplace(seed.unwrap()); auto core = Core( [&cache, &cases](auto &&code, auto &&mask) { // callback function auto current = cases.find(code); if (current != cases.end()) { current->second |= mask; // update mask return; } cases.emplace(code, mask); cache.emplace(code); } ); while (!cache.empty()) { // until BFS without elements core.next_cases(cache.front(), cases.find(cache.front())->second); cache.pop(); // case dequeue } auto result = std::vector(); result.reserve(cases.size()); for (auto &&raw_code : cases) { // export group cases result.emplace_back(RawCode::unsafe_create(raw_code.first)); } return result; } } // namespace klotski