106 lines
2.0 KiB
C++
106 lines
2.0 KiB
C++
#pragma once
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#include <cstdint>
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namespace chess {
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namespace piece_type {
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constexpr int8_t empty = 0;
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constexpr int8_t pawn = 1;
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constexpr int8_t knight = 2;
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constexpr int8_t bishop = 3;
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constexpr int8_t rook = 4;
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constexpr int8_t queen = 5;
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constexpr int8_t king = 6;
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};
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namespace movement_state {
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constexpr int8_t not_moved = 0;
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constexpr int8_t moved = 1;
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}
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struct xy {
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int8_t x;
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int8_t y;
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};
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struct piece {
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int8_t type; // piece_type
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int8_t movement; // movement_state
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int8_t piece_list_offset;
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};
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struct piece_list {
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struct piece * piece[8 * 8];
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int32_t length;
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};
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struct board_state {
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struct piece board[8 * 16];
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};
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enum struct move_type : int8_t {
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normal,
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castle_short,
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castle_long,
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pawn_double_advance,
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pawn_en_passant_capture,
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};
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struct move_t {
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enum move_type type;
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int8_t to_position;
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};
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struct moves_list {
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move_t moves[27];
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int8_t length;
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};
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enum struct annotation_type : int8_t {
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highlight,
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arrow,
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};
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struct annotation {
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annotation_type type;
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int8_t from_position;
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int8_t to_position;
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};
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struct annotation_list {
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struct annotation annotation[127];
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int8_t length;
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};
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struct interaction_state {
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struct {
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int8_t from_position;
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int8_t to_position;
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} last_move;
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int8_t selected_position;
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struct moves_list moves;
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struct annotation_list annotation_list;
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};
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struct game_state {
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struct board_state board;
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struct piece_list piece_list;
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struct interaction_state interaction;
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int8_t turn;
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int8_t en_passant_target; // index into board_state.board
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uint16_t halfmove_number;
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uint16_t fullmove_number;
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};
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xy position_to_xy(int8_t position);
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int8_t xy_to_position(int8_t x, int8_t y);
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int8_t piece_list_to_position(const chess::board_state& board_state,
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chess::piece * piece);
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void game_init(game_state& game_state);
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void select_position(game_state& game_state, int8_t x, int8_t y);
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void annotate_position(game_state& game_state, int8_t x, int8_t y);
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void clear_annotations(game_state& game_state);
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}
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