978 lines
33 KiB
C++
978 lines
33 KiB
C++
#ifndef PUZZLE_HPP_
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#define PUZZLE_HPP_
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#include "config.hpp"
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#include "util.hpp"
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#include "bits.hpp"
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#include <array>
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#include <cstddef>
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#include <functional>
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#include <ranges>
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#include <string>
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#include <vector>
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#include <boost/unordered/unordered_flat_set.hpp>
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// #define RUNTIME_CHECKS
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// Forward declare to use in puzzle member functions
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struct block_hasher;
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struct block_hasher2;
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struct block_equal2;
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struct puzzle_hasher;
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/*
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* 8x8 board
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* -> 64 (sizes) * 2 (target) * 2 (movable) blocks = 1 Byte
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*
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* 1. Encode the position inside the board (max 64 cells)
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* -> 64 (slots) * 1 Byte (block) = 64 Byte
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* 2. Encode the position inside the block (max 64 cells)
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* -> 64 (blocks) * 2 Byte (size + pos) = 128 Byte
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* 3. Encode the position inside the block (with 15 block limit)
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* -> 15 (blocks) * 2 (block) = 30 Byte
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*
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* Store board size + restricted: +1 Byte
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* Store target position: +1 Byte
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*
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* => Limit to 15 blocks max and use option 3. (4x uint64_t)
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*
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*/
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class puzzle
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{
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public:
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/*
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* A block is represented as uint16_t.
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* It stores its position, width, height and if it's the target block or immovable.
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*/
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class block
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{
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friend class puzzle;
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private:
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static constexpr uint16_t INVALID = 0x8000;
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static constexpr uint8_t IMMOVABLE_S = 0;
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static constexpr uint8_t IMMOVABLE_E = 0;
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static constexpr uint8_t TARGET_S = 1;
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static constexpr uint8_t TARGET_E = 1;
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static constexpr uint8_t WIDTH_S = 2;
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static constexpr uint8_t WIDTH_E = 4;
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static constexpr uint8_t HEIGHT_S = 5;
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static constexpr uint8_t HEIGHT_E = 7;
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static constexpr uint8_t X_S = 8;
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static constexpr uint8_t X_E = 10;
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static constexpr uint8_t Y_S = 11;
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static constexpr uint8_t Y_E = 13;
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/*
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* Memory layout:
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*
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* 154 321 098 765 432 1 0
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* B0 YYY XXX HHH WWW T I
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* ---------- -----------
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* Byte 1 Byte 0
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*
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* Store the y-position at the most significant bits to obtain a row-major ordering when comparing reprs.
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* The block at (0, 0) will be the smallest, the block at (width, height) the largest,
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* the block at (1, 0) will be smaller than the block at (0, 1), all independent of block size.
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* Then, the block with size (1, 1) will be smaller than the block with size (2, 2),
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* the block with size (1, 0) - horizontal - will be smaller than the block with size (0, 1) - vertical.
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*
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* To mark if a block is empty, the first B bit is set to 1. This is required,
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* since otherwise uint16_t{0} would be a valid block. This also makes empty blocks sorted last.
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*/
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uint16_t repr;
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public:
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// Produces an invalid block, for usage with std::array<block, MaxBlocks>
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block()
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: repr(INVALID) {}
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explicit block(const uint16_t _repr)
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: repr(_repr) {}
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block(const int x, const int y, const int w, const int h, const bool t = false, const bool i = false)
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: repr(create_repr(x, y, w, h, t, i))
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{
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if (x < 0 || x + w > MAX_WIDTH || y < 0 || y + h > MAX_HEIGHT) {
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throw std::invalid_argument("Block size out of bounds");
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}
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if (t && i) {
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throw std::invalid_argument("Target block can't be immovable");
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}
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}
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auto operator==(const block other) const -> bool
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{
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return repr == other.repr;
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}
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auto operator!=(const block other) const -> bool
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{
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return repr != other.repr;
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}
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auto operator<(const block other) const -> bool
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{
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return repr < other.repr;
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}
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auto operator<=(const block other) const -> bool
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{
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return repr <= other.repr;
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}
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auto operator>(const block other) const -> bool
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{
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return repr > other.repr;
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}
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auto operator>=(const block other) const -> bool
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{
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return repr >= other.repr;
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}
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private:
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// Repr setters
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[[nodiscard]] static auto create_repr(uint8_t x,
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uint8_t y,
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uint8_t w,
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uint8_t h,
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bool t = false,
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bool i = false) -> uint16_t;
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[[nodiscard]] inline auto set_x(uint8_t x) const -> block;
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[[nodiscard]] inline auto set_y(uint8_t y) const -> block;
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[[nodiscard]] inline auto set_width(uint8_t width) const -> block;
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[[nodiscard]] inline auto set_height(uint8_t height) const -> block;
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[[nodiscard]] inline auto set_target(bool target) const -> block;
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[[nodiscard]] inline auto set_immovable(bool immovable) const -> block;
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public:
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// Repr getters
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[[nodiscard]] auto unpack_repr() const -> std::tuple<uint8_t, uint8_t, uint8_t, uint8_t, bool, bool>;
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[[nodiscard]] inline auto get_x() const -> uint8_t;
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[[nodiscard]] inline auto get_y() const -> uint8_t;
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[[nodiscard]] inline auto get_width() const -> uint8_t;
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[[nodiscard]] inline auto get_height() const -> uint8_t;
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[[nodiscard]] inline auto get_target() const -> bool;
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[[nodiscard]] inline auto get_immovable() const -> bool;
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// Util
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[[nodiscard]] auto hash() const -> size_t;
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[[nodiscard]] auto position_independent_hash() const -> size_t;
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[[nodiscard]] auto valid() const -> bool;
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[[nodiscard]] auto principal_dirs() const -> uint8_t;
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[[nodiscard]] auto covers(int _x, int _y) const -> bool;
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[[nodiscard]] auto collides(block b) const -> bool;
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};
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public:
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static constexpr uint8_t MAX_BLOCKS = 15;
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static constexpr uint8_t MIN_WIDTH = 3;
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static constexpr uint8_t MIN_HEIGHT = 3;
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static constexpr uint8_t MAX_WIDTH = 8;
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static constexpr uint8_t MAX_HEIGHT = 8;
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private:
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static constexpr uint16_t INVALID = 0x8000;
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static constexpr uint8_t RESTRICTED_S = 0;
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static constexpr uint8_t RESTRICTED_E = 0;
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static constexpr uint8_t GOAL_X_S = 1;
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static constexpr uint8_t GOAL_X_E = 3;
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static constexpr uint8_t GOAL_Y_S = 4;
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static constexpr uint8_t GOAL_Y_E = 6;
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static constexpr uint8_t WIDTH_S = 7;
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static constexpr uint8_t WIDTH_E = 9;
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static constexpr uint8_t HEIGHT_S = 10;
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static constexpr uint8_t HEIGHT_E = 12;
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static constexpr uint8_t GOAL_S = 13;
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static constexpr uint8_t GOAL_E = 13;
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struct repr_cooked
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{
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/*
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* Memory layout:
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*
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* 1543 210 98 7 654 321 0
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* B0G HHH WW W YYY XXX R
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* ---------- -----------
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* Byte 1 Byte 0
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*
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* To mark if a puzzle is empty, the first B bit is set to 1.
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* An extra bit is used to mark if the board has a goal, because we can't store MAX_WIDTH=8 in 3 bits.
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*/
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uint16_t meta;
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// NOTE: For the hashes to work, this array needs to be sorted always.
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// NOTE: This array might contain empty blocks at the end. The iterator handles this.
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std::array<uint16_t, MAX_BLOCKS> blocks;
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// repr_cooked() = delete;
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// repr_cooked(const repr_cooked& copy) = delete;
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// repr_cooked(repr_cooked&& move) = delete;
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}
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PACKED;
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/**
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* With gcc, were allowed to acces the members arbitrarily, even if they're not active (not the ones last written):
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* - https://gcc.gnu.org/onlinedocs/gcc-4.7.1/gcc/Structures-unions-enumerations-and-bit_002dfields-implementation.html#Structures-unions-enumerations-and-bit_002dfields-implementation
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* - https://gcc.gnu.org/onlinedocs/gcc-4.7.1/gcc/Optimize-Options.html#Type_002dpunning
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*/
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union repr_u
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{
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// The representation split into meta information and the blocks array
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repr_cooked cooked;
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// For 15 blocks, we have sizeof(meta) + blocks.size() * sizeof(block) = 2 + 15 * 2 = 32 Bytes
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std::array<uint64_t, 4> raw;
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};
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repr_u repr;
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public:
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// Produces an invalid puzzle, for usage with containers
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puzzle()
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: repr(repr_cooked{INVALID, invalid_blocks()}) {}
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explicit puzzle(const uint16_t meta)
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: repr(repr_cooked{meta, invalid_blocks()}) {}
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// NOTE: This constructor does not sort the blocks and is only for state space generation
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puzzle(const std::tuple<uint8_t, uint8_t, uint8_t, uint8_t, bool, bool>& meta,
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const std::array<uint16_t, MAX_BLOCKS>& sorted_blocks)
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: repr(repr_cooked{create_meta(meta), sorted_blocks}) {}
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puzzle(const uint64_t byte_0, const uint64_t byte_1, const uint64_t byte_2, const uint64_t byte_3)
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: repr(create_repr(byte_0, byte_1, byte_2, byte_3)) {}
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puzzle(const uint16_t meta, const std::array<uint16_t, MAX_BLOCKS>& blocks)
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: repr(repr_cooked{meta, blocks}) {}
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puzzle(const uint8_t w, const uint8_t h, const uint8_t tx, const uint8_t ty, const bool r, const bool g)
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: repr(create_repr(w, h, tx, ty, r, g, invalid_blocks()))
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{
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if (w < MIN_WIDTH || w > MAX_WIDTH || h < MIN_HEIGHT || h > MAX_HEIGHT) {
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throw std::invalid_argument("Board size out of bounds");
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}
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if (tx >= MAX_WIDTH || ty >= MAX_HEIGHT) {
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throw std::invalid_argument("Goal out of bounds");
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}
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}
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puzzle(const uint8_t w,
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const uint8_t h,
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const uint8_t tx,
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const uint8_t ty,
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const bool r,
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const bool g,
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const std::array<uint16_t, MAX_BLOCKS>& b)
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: repr(create_repr(w, h, tx, ty, r, g, b))
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{
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if (w < MIN_WIDTH || w > MAX_WIDTH || h < MIN_HEIGHT || h > MAX_HEIGHT) {
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throw std::invalid_argument("Board size out of bounds");
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}
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if (tx >= MAX_WIDTH || ty >= MAX_HEIGHT) {
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throw std::invalid_argument("Goal out of bounds");
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}
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}
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puzzle(const uint8_t w, const uint8_t h)
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: repr(create_repr(w, h, 0, 0, false, false, invalid_blocks()))
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{
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if (w < MIN_WIDTH || w > MAX_WIDTH || h < MIN_HEIGHT || h > MAX_HEIGHT) {
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throw std::invalid_argument("Board size out of bounds");
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}
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}
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explicit puzzle(const std::string& string_repr)
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: repr(create_repr(string_repr)) {}
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public:
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auto operator==(const puzzle& other) const -> bool
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{
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return repr.raw == other.repr.raw;
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}
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auto operator!=(const puzzle& other) const -> bool
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{
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return repr.raw != other.repr.raw;
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}
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auto operator<(const puzzle& other) const -> bool
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{
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// Start from MSB and go to LSB. If equal, check the next.
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for (int i = 3; i >= 0; --i) {
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if (repr.raw[i] < other.repr.raw[i]) {
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return true;
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}
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if (repr.raw[i] > other.repr.raw[i]) {
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return false;
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}
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}
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// All are equal
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return false;
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}
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auto operator<=(const puzzle& other) const -> bool
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{
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return *this < other || *this == other;
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}
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auto operator>(const puzzle& other) const -> bool
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{
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return !(*this <= other);
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}
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auto operator>=(const puzzle& other) const -> bool
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{
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return !(*this < other);
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}
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auto repr_view() const
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{
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return std::span<const uint16_t>(repr.cooked.blocks.data(), block_count());
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}
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auto block_view() const
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{
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return std::span<const uint16_t>(repr.cooked.blocks.data(), block_count()) | std::views::transform(
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[](const uint16_t val)
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{
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return block(val);
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});
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}
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template <typename T, typename... Rest>
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static auto hash_combine(std::size_t& seed, const T& v, const Rest&... rest) -> void;
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private:
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[[nodiscard]] static constexpr auto invalid_blocks() -> std::array<uint16_t, MAX_BLOCKS>
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{
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std::array<uint16_t, MAX_BLOCKS> blocks;
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for (size_t i = 0; i < MAX_BLOCKS; ++i) {
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blocks[i] = block::INVALID;
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}
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return blocks;
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}
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// Repr setters
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[[nodiscard]] static auto create_meta(
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const std::tuple<uint8_t, uint8_t, uint8_t, uint8_t, bool, bool>& meta) -> uint16_t;
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[[nodiscard]] static auto create_repr(uint8_t w,
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uint8_t h,
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uint8_t tx,
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uint8_t ty,
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bool r,
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bool g,
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const std::array<uint16_t, MAX_BLOCKS>& b) -> repr_cooked;
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[[nodiscard]] static auto create_repr(uint64_t byte_0,
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uint64_t byte_1,
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uint64_t byte_2,
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uint64_t byte_3) -> repr_cooked;
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[[nodiscard]] static auto create_repr(const std::string& string_repr) -> repr_cooked;
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[[nodiscard]] inline auto set_restricted(bool restricted) const -> puzzle;
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[[nodiscard]] inline auto set_width(uint8_t width) const -> puzzle;
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[[nodiscard]] inline auto set_height(uint8_t height) const -> puzzle;
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[[nodiscard]] inline auto set_goal(bool goal) const -> puzzle;
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[[nodiscard]] inline auto set_goal_x(uint8_t target_x) const -> puzzle;
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[[nodiscard]] inline auto set_goal_y(uint8_t target_y) const -> puzzle;
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[[nodiscard]] auto set_blocks(std::array<uint16_t, MAX_BLOCKS> blocks) const -> puzzle;
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public:
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// Repr getters
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[[nodiscard]] auto unpack_meta() const -> std::tuple<uint8_t, uint8_t, uint8_t, uint8_t, bool, bool>;
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[[nodiscard]] inline auto get_restricted() const -> bool;
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[[nodiscard]] inline auto get_width() const -> uint8_t;
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[[nodiscard]] inline auto get_height() const -> uint8_t;
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[[nodiscard]] inline auto get_goal() const -> bool;
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[[nodiscard]] inline auto get_goal_x() const -> uint8_t;
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[[nodiscard]] inline auto get_goal_y() const -> uint8_t;
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// Util
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[[nodiscard]] auto hash() const -> size_t;
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[[nodiscard]] auto string_repr() const -> std::string;
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[[nodiscard]] static auto try_parse_string_repr(const std::string& string_repr) -> std::optional<repr_cooked>;
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[[nodiscard]] auto valid() const -> bool;
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[[nodiscard]] auto try_get_invalid_reason() const -> std::optional<std::string>;
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[[nodiscard]] auto block_count() const -> uint8_t;
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[[nodiscard]] auto goal_reached() const -> bool;
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[[nodiscard]] auto try_get_block(uint8_t x, uint8_t y) const -> std::optional<block>;
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[[nodiscard]] auto try_get_target_block() const -> std::optional<block>;
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[[nodiscard]] auto covers(uint8_t x, uint8_t y, uint8_t _w, uint8_t _h) const -> bool;
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[[nodiscard]] auto covers(uint8_t x, uint8_t y) const -> bool;
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[[nodiscard]] auto covers(block b) const -> bool;
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// Editing
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[[nodiscard]] auto toggle_restricted() const -> puzzle;
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[[nodiscard]] auto try_set_goal(uint8_t x, uint8_t y) const -> std::optional<puzzle>;
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[[nodiscard]] auto clear_goal() const -> puzzle;
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[[nodiscard]] auto try_add_column() const -> std::optional<puzzle>;
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[[nodiscard]] auto try_remove_column() const -> std::optional<puzzle>;
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[[nodiscard]] auto try_add_row() const -> std::optional<puzzle>;
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[[nodiscard]] auto try_remove_row() const -> std::optional<puzzle>;
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[[nodiscard]] auto try_add_block(block b) const -> std::optional<puzzle>;
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[[nodiscard]] auto try_remove_block(uint8_t x, uint8_t y) const -> std::optional<puzzle>;
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[[nodiscard]] auto try_toggle_target(uint8_t x, uint8_t y) const -> std::optional<puzzle>;
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[[nodiscard]] auto try_toggle_wall(uint8_t x, uint8_t y) const -> std::optional<puzzle>;
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// Playing
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[[nodiscard]] auto try_move_block_at(uint8_t x, uint8_t y, dir dir) const -> std::optional<puzzle>;
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// Statespace
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[[nodiscard]] INLINE inline auto try_move_block_at_fast(uint64_t bitmap,
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uint8_t block_idx,
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dir dir,
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bool check_collision = true) const -> std::optional<puzzle>;
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[[nodiscard]] static auto sorted_replace(std::array<uint16_t, MAX_BLOCKS> blocks,
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uint8_t idx,
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uint16_t new_val) -> std::array<uint16_t, MAX_BLOCKS>;
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[[nodiscard]] auto blocks_bitmap() const -> uint64_t;
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[[nodiscard]] auto blocks_bitmap_h() const -> uint64_t;
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[[nodiscard]] auto blocks_bitmap_v() const -> uint64_t;
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static INLINE inline auto bitmap_clear_bit(uint64_t& bitmap, uint8_t w, uint8_t x, uint8_t y) -> void;
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static INLINE inline auto bitmap_set_bit(uint64_t& bitmap, uint8_t w, uint8_t x, uint8_t y) -> void;
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[[nodiscard]] static INLINE inline auto bitmap_get_bit(uint64_t bitmap, uint8_t w, uint8_t x, uint8_t y) -> bool;
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INLINE inline auto bitmap_clear_block(uint64_t& bitmap, block b) const -> void;
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INLINE inline auto bitmap_set_block(uint64_t& bitmap, block b) const -> void;
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[[nodiscard]] INLINE inline auto bitmap_is_empty(uint64_t bitmap) const -> bool;
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[[nodiscard]] INLINE inline auto bitmap_is_full(uint64_t bitmap) const -> bool;
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/**
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* Checks if b would collide with any block on the board.
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*
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* @param bitmap Board occupancy map
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* @param b Hypothetical block to check collision with
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|
* @return True if b would collide with any other block on the board
|
|
*/
|
|
[[nodiscard]] INLINE inline auto bitmap_check_collision(uint64_t bitmap, block b) const -> bool;
|
|
|
|
/**
|
|
* Checks if b would collide with any block on the board after moving in direction dir.
|
|
*
|
|
* @param bitmap Board occupancy map
|
|
* @param b Existing block to check collision with
|
|
* @param dir Direction in which the block should be moved
|
|
* @return True if b would collide with any other block on the board after moving in direction dir
|
|
*/
|
|
[[nodiscard]] INLINE inline auto bitmap_check_collision(uint64_t bitmap, block b, dir dir) const -> bool;
|
|
|
|
template <typename F>
|
|
// ReSharper disable once CppRedundantInlineSpecifier
|
|
INLINE inline auto for_each_adjacent(F&& callback) const -> void
|
|
{
|
|
const uint64_t bitmap = blocks_bitmap();
|
|
const bool r = get_restricted();
|
|
for (uint8_t idx = 0; idx < MAX_BLOCKS; idx++) {
|
|
const block b = block(repr.cooked.blocks[idx]);
|
|
if (!b.valid()) {
|
|
break;
|
|
}
|
|
if (b.get_immovable()) {
|
|
continue;
|
|
}
|
|
const int dirs = r ? b.principal_dirs() : nor | eas | sou | wes;
|
|
for (const dir d : {nor, eas, sou, wes}) {
|
|
if (dirs & d) {
|
|
if (auto moved = try_move_block_at_fast(bitmap, idx, d)) {
|
|
callback(*moved);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
[[nodiscard]] auto explore_state_space() const
|
|
-> std::pair<std::vector<puzzle>, std::vector<std::pair<size_t, size_t>>>;
|
|
|
|
// Determines to which cluster a puzzle belongs. Clusters are identified by the
|
|
// state with the numerically smallest binary representation.
|
|
[[nodiscard]] auto get_cluster_id_and_solution() const -> std::pair<puzzle, bool>;
|
|
|
|
[[nodiscard]] auto bitmap_find_first_empty(uint64_t bitmap, int& x, int& y) const -> bool;
|
|
|
|
static auto generate_block_sequences(
|
|
const boost::unordered_flat_set<block, block_hasher2, block_equal2>& permitted_blocks,
|
|
block target_block,
|
|
size_t max_blocks,
|
|
std::vector<block>& current_sequence,
|
|
int current_area,
|
|
int board_area,
|
|
const std::function<void(const std::vector<block>&)>& callback) -> void;
|
|
|
|
static auto place_block_sequence(const puzzle& p,
|
|
const uint64_t& bitmap,
|
|
const std::tuple<uint8_t, uint8_t, uint8_t, uint8_t, bool, bool>& p_repr,
|
|
const std::vector<block>& sequence,
|
|
block target_block,
|
|
const std::tuple<uint8_t, uint8_t, uint8_t, uint8_t>& target_block_pos_range,
|
|
bool has_target,
|
|
size_t index,
|
|
const std::function<void(const puzzle&)>& callback) -> void;
|
|
|
|
[[nodiscard]] auto explore_puzzle_space(
|
|
const boost::unordered_flat_set<block, block_hasher2, block_equal2>& permitted_blocks,
|
|
block target_block,
|
|
const std::tuple<uint8_t, uint8_t, uint8_t, uint8_t>& target_block_pos_range,
|
|
size_t max_blocks,
|
|
std::optional<BS::thread_pool<>* const> thread_pool = std::nullopt) const -> boost::unordered_flat_set<
|
|
puzzle, puzzle_hasher>;
|
|
};
|
|
|
|
// Inline functions definitions
|
|
#ifndef REGION_INLINE_DEFS
|
|
|
|
inline auto puzzle::block::set_x(const uint8_t x) const -> block
|
|
{
|
|
#ifdef RUNTIME_CHECKS
|
|
if (x > 7) {
|
|
throw std::invalid_argument("Block x-position out of bounds");
|
|
}
|
|
#endif
|
|
|
|
block b = *this;
|
|
set_bits(b.repr, X_S, X_E, x);
|
|
return b;
|
|
}
|
|
|
|
inline auto puzzle::block::set_y(const uint8_t y) const -> block
|
|
{
|
|
#ifdef RUNTIME_CHECKS
|
|
if (y > 7) {
|
|
throw std::invalid_argument("Block y-position out of bounds");
|
|
}
|
|
#endif
|
|
|
|
block b = *this;
|
|
set_bits(b.repr, Y_S, Y_E, y);
|
|
return b;
|
|
}
|
|
|
|
inline auto puzzle::block::set_width(const uint8_t width) const -> block
|
|
{
|
|
#ifdef RUNTIME_CHECKS
|
|
if (width - 1 > 7) {
|
|
throw std::invalid_argument("Block width out of bounds");
|
|
}
|
|
#endif
|
|
|
|
block b = *this;
|
|
set_bits(b.repr, WIDTH_S, WIDTH_E, width - 1u);
|
|
return b;
|
|
}
|
|
|
|
inline auto puzzle::block::set_height(const uint8_t height) const -> block
|
|
{
|
|
#ifdef RUNTIME_CHECKS
|
|
if (height - 1 > 7) {
|
|
throw std::invalid_argument("Block height out of bounds");
|
|
}
|
|
#endif
|
|
|
|
block b = *this;
|
|
set_bits(b.repr, HEIGHT_S, HEIGHT_E, height - 1u);
|
|
return b;
|
|
}
|
|
|
|
inline auto puzzle::block::set_target(const bool target) const -> block
|
|
{
|
|
block b = *this;
|
|
set_bits(b.repr, TARGET_S, TARGET_E, target);
|
|
return b;
|
|
}
|
|
|
|
inline auto puzzle::block::set_immovable(const bool immovable) const -> block
|
|
{
|
|
block b = *this;
|
|
set_bits(b.repr, IMMOVABLE_S, IMMOVABLE_E, immovable);
|
|
return b;
|
|
}
|
|
|
|
inline auto puzzle::block::get_x() const -> uint8_t
|
|
{
|
|
return get_bits(repr, X_S, X_E);
|
|
}
|
|
|
|
inline auto puzzle::block::get_y() const -> uint8_t
|
|
{
|
|
return get_bits(repr, Y_S, Y_E);
|
|
}
|
|
|
|
inline auto puzzle::block::get_width() const -> uint8_t
|
|
{
|
|
return get_bits(repr, WIDTH_S, WIDTH_E) + 1u;
|
|
}
|
|
|
|
inline auto puzzle::block::get_height() const -> uint8_t
|
|
{
|
|
return get_bits(repr, HEIGHT_S, HEIGHT_E) + 1u;
|
|
}
|
|
|
|
inline auto puzzle::block::get_target() const -> bool
|
|
{
|
|
return get_bits(repr, TARGET_S, TARGET_E);
|
|
}
|
|
|
|
inline auto puzzle::block::get_immovable() const -> bool
|
|
{
|
|
return get_bits(repr, IMMOVABLE_S, IMMOVABLE_E);
|
|
}
|
|
|
|
inline auto puzzle::set_restricted(const bool restricted) const -> puzzle
|
|
{
|
|
uint16_t meta = repr.cooked.meta;
|
|
set_bits(meta, RESTRICTED_S, RESTRICTED_E, restricted);
|
|
return puzzle(meta, repr.cooked.blocks);
|
|
}
|
|
|
|
inline auto puzzle::set_width(const uint8_t width) const -> puzzle
|
|
{
|
|
#ifdef RUNTIME_CHECKS
|
|
if (width - 1 > MAX_WIDTH) {
|
|
throw "Board width out of bounds";
|
|
}
|
|
#endif
|
|
|
|
uint16_t meta = repr.cooked.meta;
|
|
set_bits(meta, WIDTH_S, WIDTH_E, width - 1u);
|
|
return puzzle(meta, repr.cooked.blocks);
|
|
}
|
|
|
|
inline auto puzzle::set_height(const uint8_t height) const -> puzzle
|
|
{
|
|
#ifdef RUNTIME_CHECKS
|
|
if (height - 1 > MAX_HEIGHT) {
|
|
throw "Board height out of bounds";
|
|
}
|
|
#endif
|
|
|
|
uint16_t meta = repr.cooked.meta;
|
|
set_bits(meta, HEIGHT_S, HEIGHT_E, height - 1u);
|
|
return puzzle(meta, repr.cooked.blocks);
|
|
}
|
|
|
|
inline auto puzzle::set_goal(const bool goal) const -> puzzle
|
|
{
|
|
uint16_t meta = repr.cooked.meta;
|
|
set_bits(meta, GOAL_S, GOAL_E, goal);
|
|
return puzzle(meta, repr.cooked.blocks);
|
|
}
|
|
|
|
inline auto puzzle::set_goal_x(const uint8_t target_x) const -> puzzle
|
|
{
|
|
#ifdef RUNTIME_CHECKS
|
|
if (target_x >= MAX_WIDTH) {
|
|
throw "Board target x out of bounds";
|
|
}
|
|
#endif
|
|
|
|
uint16_t meta = repr.cooked.meta;
|
|
set_bits(meta, GOAL_X_S, GOAL_X_E, target_x);
|
|
return puzzle(meta, repr.cooked.blocks);
|
|
}
|
|
|
|
inline auto puzzle::set_goal_y(const uint8_t target_y) const -> puzzle
|
|
{
|
|
#ifdef RUNTIME_CHECKS
|
|
if (target_y >= MAX_HEIGHT) {
|
|
throw "Board target y out of bounds";
|
|
}
|
|
#endif
|
|
|
|
uint16_t meta = repr.cooked.meta;
|
|
set_bits(meta, GOAL_Y_S, GOAL_Y_E, target_y);
|
|
return puzzle(meta, repr.cooked.blocks);
|
|
}
|
|
|
|
inline auto puzzle::get_restricted() const -> bool
|
|
{
|
|
return get_bits(repr.cooked.meta, RESTRICTED_S, RESTRICTED_E);
|
|
}
|
|
|
|
inline auto puzzle::get_width() const -> uint8_t
|
|
{
|
|
return get_bits(repr.cooked.meta, WIDTH_S, WIDTH_E) + 1u;
|
|
}
|
|
|
|
inline auto puzzle::get_height() const -> uint8_t
|
|
{
|
|
return get_bits(repr.cooked.meta, HEIGHT_S, HEIGHT_E) + 1u;
|
|
}
|
|
|
|
inline auto puzzle::get_goal() const -> bool
|
|
{
|
|
return get_bits(repr.cooked.meta, GOAL_S, GOAL_E);
|
|
}
|
|
|
|
inline auto puzzle::get_goal_x() const -> uint8_t
|
|
{
|
|
return get_bits(repr.cooked.meta, GOAL_X_S, GOAL_X_E);
|
|
}
|
|
|
|
inline auto puzzle::get_goal_y() const -> uint8_t
|
|
{
|
|
return get_bits(repr.cooked.meta, GOAL_Y_S, GOAL_Y_E);
|
|
}
|
|
|
|
INLINE inline auto puzzle::try_move_block_at_fast(uint64_t bitmap,
|
|
const uint8_t block_idx,
|
|
const dir dir,
|
|
const bool check_collision) const -> std::optional<puzzle>
|
|
{
|
|
const block b = block(repr.cooked.blocks[block_idx]);
|
|
const auto [bx, by, bw, bh, bt, bi] = b.unpack_repr();
|
|
if (bi) {
|
|
return std::nullopt;
|
|
}
|
|
|
|
const auto [w, h, gx, gy, r, g] = unpack_meta();
|
|
const int dirs = r ? b.principal_dirs() : nor | eas | sou | wes;
|
|
|
|
// Get target block
|
|
int _target_x = bx;
|
|
int _target_y = by;
|
|
switch (dir) {
|
|
case nor:
|
|
if (!(dirs & nor) || _target_y < 1) {
|
|
return std::nullopt;
|
|
}
|
|
--_target_y;
|
|
break;
|
|
case eas:
|
|
if (!(dirs & eas) || _target_x + bw >= w) {
|
|
return std::nullopt;
|
|
}
|
|
++_target_x;
|
|
break;
|
|
case sou:
|
|
if (!(dirs & sou) || _target_y + bh >= h) {
|
|
return std::nullopt;
|
|
}
|
|
++_target_y;
|
|
break;
|
|
case wes:
|
|
if (!(dirs & wes) || _target_x < 1) {
|
|
return std::nullopt;
|
|
}
|
|
--_target_x;
|
|
break;
|
|
}
|
|
|
|
// Check collisions
|
|
if (check_collision) {
|
|
bitmap_clear_block(bitmap, b);
|
|
if (bitmap_check_collision(bitmap, b, dir)) {
|
|
return std::nullopt;
|
|
}
|
|
}
|
|
|
|
// Replace block
|
|
const std::array<uint16_t, MAX_BLOCKS> blocks = sorted_replace(repr.cooked.blocks,
|
|
block_idx,
|
|
block::create_repr(
|
|
_target_x,
|
|
_target_y,
|
|
bw,
|
|
bh,
|
|
bt));
|
|
|
|
// This constructor doesn't sort
|
|
return puzzle(std::make_tuple(w, h, gx, gy, r, g), blocks);
|
|
}
|
|
|
|
INLINE inline auto puzzle::bitmap_clear_bit(uint64_t& bitmap, const uint8_t w, const uint8_t x, const uint8_t y) -> void
|
|
{
|
|
set_bits(bitmap, y * w + x, y * w + x, 0u);
|
|
}
|
|
|
|
INLINE inline auto puzzle::bitmap_set_bit(uint64_t& bitmap, const uint8_t w, const uint8_t x, const uint8_t y) -> void
|
|
{
|
|
set_bits(bitmap, y * w + x, y * w + x, 1u);
|
|
}
|
|
|
|
INLINE inline auto puzzle::bitmap_get_bit(const uint64_t bitmap,
|
|
const uint8_t w,
|
|
const uint8_t x,
|
|
const uint8_t y) -> bool
|
|
{
|
|
return get_bits(bitmap, y * w + x, y * w + x);
|
|
}
|
|
|
|
INLINE inline auto puzzle::bitmap_clear_block(uint64_t& bitmap, const block b) const -> void
|
|
{
|
|
const auto [x, y, w, h, t, i] = b.unpack_repr();
|
|
const uint8_t width = get_width();
|
|
|
|
for (int dy = 0; dy < h; ++dy) {
|
|
for (int dx = 0; dx < w; ++dx) {
|
|
bitmap_clear_bit(bitmap, width, x + dx, y + dy);
|
|
}
|
|
}
|
|
}
|
|
|
|
INLINE inline auto puzzle::bitmap_set_block(uint64_t& bitmap, const block b) const -> void
|
|
{
|
|
const auto [x, y, w, h, t, i] = b.unpack_repr();
|
|
const uint8_t width = get_width();
|
|
|
|
for (int dy = 0; dy < h; ++dy) {
|
|
for (int dx = 0; dx < w; ++dx) {
|
|
bitmap_set_bit(bitmap, width, x + dx, y + dy);
|
|
}
|
|
}
|
|
}
|
|
|
|
INLINE inline auto puzzle::bitmap_is_empty(const uint64_t bitmap) const -> bool
|
|
{
|
|
const uint8_t shift = 64 - get_width() * get_height();
|
|
return bitmap << shift == 0;
|
|
}
|
|
|
|
INLINE inline auto puzzle::bitmap_is_full(const uint64_t bitmap) const -> bool
|
|
{
|
|
const uint8_t shift = 64 - get_width() * get_height();
|
|
return ((bitmap << shift) >> shift) == ((static_cast<uint64_t>(-1) << shift) >> shift);
|
|
}
|
|
|
|
INLINE inline auto puzzle::bitmap_check_collision(const uint64_t bitmap, const block b) const -> bool
|
|
{
|
|
const auto [x, y, w, h, t, i] = b.unpack_repr();
|
|
const uint8_t width = get_width();
|
|
|
|
for (int dy = 0; dy < h; ++dy) {
|
|
for (int dx = 0; dx < w; ++dx) {
|
|
if (bitmap_get_bit(bitmap, width, x + dx, y + dy)) {
|
|
return true; // collision
|
|
}
|
|
}
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
INLINE inline auto puzzle::bitmap_check_collision(const uint64_t bitmap,
|
|
const block b,
|
|
const dir dir) const -> bool
|
|
{
|
|
const auto [x, y, w, h, t, i] = b.unpack_repr();
|
|
const uint8_t width = get_width();
|
|
|
|
switch (dir) {
|
|
case nor: // Check the row above: (x...x+w-1, y-1)
|
|
for (int dx = 0; dx < w; ++dx) {
|
|
if (bitmap_get_bit(bitmap, width, x + dx, y - 1)) {
|
|
return true;
|
|
}
|
|
}
|
|
break;
|
|
case sou: // Check the row below: (x...x+w-1, y+h)
|
|
for (int dx = 0; dx < w; ++dx) {
|
|
if (bitmap_get_bit(bitmap, width, x + dx, y + h)) {
|
|
return true;
|
|
}
|
|
}
|
|
break;
|
|
case wes: // Check the column left: (x-1, y...y+h-1)
|
|
for (int dy = 0; dy < h; ++dy) {
|
|
if (bitmap_get_bit(bitmap, width, x - 1, y + dy)) {
|
|
return true;
|
|
}
|
|
}
|
|
break;
|
|
case eas: // Check the column right: (x+w, y...y+h-1)
|
|
for (int dy = 0; dy < h; ++dy) {
|
|
if (bitmap_get_bit(bitmap, width, x + w, y + dy)) {
|
|
return true;
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
#endif
|
|
|
|
// Hash functions for sets and maps.
|
|
// Declared after puzzle class to use puzzle::hash_combine
|
|
#ifndef REGION_HASHERS
|
|
|
|
struct block_hasher
|
|
{
|
|
auto operator()(const puzzle::block& b) const noexcept -> size_t
|
|
{
|
|
return b.hash();
|
|
}
|
|
};
|
|
|
|
struct block_hasher2
|
|
{
|
|
auto operator()(const puzzle::block& b) const noexcept -> size_t
|
|
{
|
|
return b.position_independent_hash();
|
|
}
|
|
};
|
|
|
|
struct block_equal2
|
|
{
|
|
auto operator()(const puzzle::block& a, const puzzle::block& b) const noexcept -> bool
|
|
{
|
|
const auto [ax, ay, aw, ah, at, ai] = a.unpack_repr();
|
|
const auto [bx, by, bw, bh, bt, bi] = b.unpack_repr();
|
|
|
|
return aw == bw && ah == bh && at == bt && ai == bi;
|
|
}
|
|
};
|
|
|
|
struct puzzle_hasher
|
|
{
|
|
auto operator()(const puzzle& s) const noexcept -> size_t
|
|
{
|
|
return s.hash();
|
|
}
|
|
};
|
|
|
|
struct link_hasher
|
|
{
|
|
auto operator()(const std::pair<puzzle, puzzle>& s) const noexcept -> size_t
|
|
{
|
|
size_t h = 0;
|
|
if (s.first < s.second) {
|
|
puzzle::hash_combine(h, s.first, s.second);
|
|
} else {
|
|
puzzle::hash_combine(h, s.second, s.first);
|
|
}
|
|
return h;
|
|
}
|
|
};
|
|
|
|
struct link_equal
|
|
{
|
|
auto operator()(const std::pair<puzzle, puzzle>& a, const std::pair<puzzle, puzzle>& b) const noexcept -> bool
|
|
{
|
|
return (a.first == b.first && a.second == b.second) || (a.first == b.second && a.second == b.first);
|
|
}
|
|
};
|
|
|
|
template <typename T, typename... Rest>
|
|
auto puzzle::hash_combine(size_t& seed, const T& v, const Rest&... rest) -> void
|
|
{
|
|
auto hasher = []<typename HashedType>(const HashedType& val) -> std::size_t
|
|
{
|
|
if constexpr (std::is_same_v<std::decay_t<HashedType>, puzzle>) {
|
|
return puzzle_hasher{}(val);
|
|
} else if constexpr (std::is_same_v<std::decay_t<HashedType>, std::pair<puzzle, puzzle>>) {
|
|
return link_hasher{}(val);
|
|
} else {
|
|
return std::hash<std::decay_t<HashedType>>{}(val);
|
|
}
|
|
};
|
|
|
|
seed ^= hasher(v) + 0x9e3779b9 + (seed << 6) + (seed >> 2);
|
|
(hash_combine(seed, rest), ...);
|
|
}
|
|
|
|
#endif
|
|
|
|
#endif |