commit 58a8a3008fb800a3218322d63aa02e76c7fb9f88 Author: Unbewohnte Date: Fri Nov 10 22:28:50 2023 +0300 Initial commit: basic abstractions, a couple of working flags, piece logic and chess notation are not yet complete diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..efe4b2b --- /dev/null +++ b/.gitignore @@ -0,0 +1,2 @@ +.vscode/ +bin/ \ No newline at end of file diff --git a/COPYING b/COPYING new file mode 100644 index 0000000..be3f7b2 --- /dev/null +++ b/COPYING @@ -0,0 +1,661 @@ + GNU AFFERO GENERAL PUBLIC LICENSE + Version 3, 19 November 2007 + + Copyright (C) 2007 Free Software Foundation, Inc. + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + + Preamble + + The GNU Affero General Public License is a free, copyleft license for +software and other kinds of works, specifically designed to ensure +cooperation with the community in the case of network server software. + + The licenses for most software and other practical works are designed +to take away your freedom to share and change the works. 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There are many ways you could offer source, and different +solutions will be better for different programs; see section 13 for the +specific requirements. + + You should also get your employer (if you work as a programmer) or school, +if any, to sign a "copyright disclaimer" for the program, if necessary. +For more information on this, and how to apply and follow the GNU AGPL, see +. diff --git a/Makefile b/Makefile new file mode 100644 index 0000000..5555eaa --- /dev/null +++ b/Makefile @@ -0,0 +1,6 @@ +all: + mkdir -p bin + gcc -Wall -Werror -static -O2 src/*.c -o bin/chess + +clean: + rm -rf bin \ No newline at end of file diff --git a/README.md b/README.md new file mode 100644 index 0000000..7dd4df3 --- /dev/null +++ b/README.md @@ -0,0 +1,26 @@ +# C3hess - Console Chess written in C + +## A portable chess game and an engine in one package + + +## About + + + +## Building + +```make``` + +or + +```./make.sh``` + +or compile yourself, there are no dependencies + + +## Installation + + +## License + +AGPLv3 \ No newline at end of file diff --git a/TODO b/TODO new file mode 100644 index 0000000..d15e498 --- /dev/null +++ b/TODO @@ -0,0 +1,2 @@ +1. Algebraic notation: notation_move_from_string, notation_move_to_string, documentation +2. Board: board_is_move_legal, add other piece's moves \ No newline at end of file diff --git a/make.sh b/make.sh new file mode 100755 index 0000000..4df096a --- /dev/null +++ b/make.sh @@ -0,0 +1,4 @@ +#!/bin/sh + +mkdir -p bin +gcc -Wall -Werror -static -O2 src/*.c -o bin/chess \ No newline at end of file diff --git a/src/algebraic_notation.c b/src/algebraic_notation.c new file mode 100644 index 0000000..cb563ca --- /dev/null +++ b/src/algebraic_notation.c @@ -0,0 +1,335 @@ +/* +c3hess - Console Chess written in C +Copyright (C) 2023 Kasyanov Nikolay Alexeyevich + +This program is free software: you can redistribute it and/or modify +it under the terms of the GNU Affero General Public License as published by +the Free Software Foundation, either version 3 of the License, or +(at your option) any later version. + +This program is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU Affero General Public License for more details. + +You should have received a copy of the GNU Affero General Public License +along with this program. If not, see . +*/ + + +#include +#include +#include +#include "algebraic_notation.h" + + +// Converts a tile notation to a position on the board +Position notation_tile_to_position(TileNotation notation) { + Position pos; + switch (notation.file) { + case 'a': { + pos.column = 1; + break; + } + case 'b': { + pos.column = 2; + break; + } + case 'c': { + pos.column = 3; + break; + } + case 'd': { + pos.column = 4; + break; + } + case 'e': { + pos.column = 5; + break; + } + case 'f': { + pos.column = 6; + break; + } + case 'g': { + pos.column = 7; + break; + } + case 'h': { + pos.column = 8; + break; + } + default: { + break; + } + } + pos.row = notation.rank; + + return pos; +} + + +char* notation_tile_to_string(TileNotation tile) { + char* notation = (char*) malloc(sizeof(char) * 2); + if (!notation) { + return NULL; + } + + notation[0] = tile.file; // col + notation[1] = (char) tile.rank; // row + + return notation; +} + +void notation_tile_to_string_cpy(TileNotation tile, char* dest) { + if (!dest) { + return; + } + + char* notation = notation_tile_to_string(tile); + strcpy(dest, notation); + free(notation); + + return; +} + + +TileNotation notation_tile_from_string(const char* tile_string) { + if (!tile_string) { + return notation_tile_new('a', 1); + } + + TileNotation tile; + tile.file = tile_string[0]; + tile.rank = (unsigned int) tile_string[1]; + + return tile; +} + + +TileNotation notation_tile_new(char file, unsigned int rank) { + TileNotation tile; + tile.file = file; + tile.rank = rank; + + return tile; +} + + +// Converts +TileNotation notation_tile_from_pos(Position pos) { + TileNotation tile; + switch (pos.row) { + case 1: { + tile.file = 'a'; + break; + } + case 2: { + tile.file = 'b'; + break; + } + case 3: { + tile.file = 'c'; + break; + } + case 4: { + tile.file = 'd'; + break; + } + case 5: { + tile.file = 'e'; + break; + } + case 6: { + tile.file = 'f'; + break; + } + case 7: { + tile.file = 'g'; + break; + } + case 8: { + tile.file = 'h'; + break; + } + default: { + tile.file = '\0'; + break; + } + } + tile.rank = pos.column; + + return tile; +} + + + +// Returns a piece character. Upper case for white, lower case for black +char notation_piece_to_char(Piece piece) { + switch (piece.type) { + case KING: { + if (piece.color == WHITE) { + return 'K'; + } else { + return 'k'; + } + break; + } + case ROOK: { + if (piece.color == WHITE) { + return 'R'; + } else { + return 'r'; + } + break; + } + case BISHOP: { + if (piece.color == WHITE) { + return 'B'; + } else { + return 'b'; + } + break; + } + case KNIGHT: { + if (piece.color == WHITE) { + return 'N'; + } else { + return 'n'; + } + break; + } + case PAWN: { + if (piece.color == WHITE) { + return 'P'; + } else { + return 'p'; + } + break; + } + case QUEEN: { + if (piece.color == WHITE) { + return 'Q'; + } else { + return 'q'; + } + break; + } + default: { + return '\0'; + } + }; +} + + +// Returns 1 if character is one of the piece characters, 0 otherwise +int notation_is_piece_char(char character) { + if ( + character == 'K' || character == 'k' || \ + character == 'R' || character == 'r' || \ + character == 'B' || character == 'b' || \ + character == 'N' || character == 'n' || \ + character == 'P' || character == 'p' || \ + character == 'Q' || character == 'q' + ) { + return 1; + } + + return 0; +} + + +char* notation_move_to_string(MoveNotation move) { + char* move_notation = (char*) malloc(sizeof(char) * 10); + if (!move_notation) { + return NULL; + } + + // if (move.move_type == MOVE) { + + // } + + switch (move.move_type) { + case MOVE: { + move_notation[0] = notation_piece_to_char(move.piece); + notation_tile_to_string_cpy(move.target, &move_notation[1]); + break; + } + + case CHECK: { + move_notation[0] = notation_piece_to_char(move.piece); + notation_tile_to_string_cpy(move.target, &move_notation[1]); + move_notation[3] = '+'; + break; + } + + case CAPTURE: { + move_notation[0] = notation_piece_to_char(move.piece); + move_notation[1] = 'x'; + notation_tile_to_string_cpy(move.target, &move_notation[2]); + break; + } + + case CHECK & CAPTURE: { + move_notation[0] = notation_piece_to_char(move.piece); + move_notation[1] = 'x'; + notation_tile_to_string_cpy(move.target, &move_notation[2]); + move_notation[4] = '+'; + break; + } + + case SHORTCASTLE: { + move_notation = strcpy(move_notation, "0-0"); + break; + } + + // case SHORTCASTLE&CHECK: { + + // } + + case LONGCASTLE: { + move_notation = strcpy(move_notation, "0-0-0"); + break; + } + + default: { + free(move_notation); + return NULL; + } + } + + return move_notation; +} + + +MoveNotation* notation_move_from_string(const char* move_string) { + if (!move_string) { + return NULL; + } + + MoveNotation* move = (MoveNotation*) malloc(sizeof(MoveNotation) * 1); + if (!move) { + return NULL; + } + + // printf(); + if (notation_is_piece_char(move_string[0])) { + + } + + return move; +} + + +MoveNotation notation_move_new(Piece piece, TileNotation origin, TileNotation target, int move_type); + + +// Converts move notation to a move +Move notation_to_move(MoveNotation notation) { + Move move = move_new( + notation_tile_to_position(notation.origin), + notation_tile_to_position(notation.target) + ); + + return move; +} \ No newline at end of file diff --git a/src/algebraic_notation.h b/src/algebraic_notation.h new file mode 100644 index 0000000..165c0ba --- /dev/null +++ b/src/algebraic_notation.h @@ -0,0 +1,83 @@ +/* +c3hess - Console Chess written in C +Copyright (C) 2023 Kasyanov Nikolay Alexeyevich + +This program is free software: you can redistribute it and/or modify +it under the terms of the GNU Affero General Public License as published by +the Free Software Foundation, either version 3 of the License, or +(at your option) any later version. + +This program is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU Affero General Public License for more details. + +You should have received a copy of the GNU Affero General Public License +along with this program. If not, see . +*/ + + +#ifndef algebraic_notation_h +#define algebraic_notation_h + + +#include "position.h" +#include "piece.h" +#include "move.h" + + +typedef struct TileNotation { + char file; + unsigned int rank; +} TileNotation; + + +// Converts a tile notation to a position on the board +Position notation_tile_to_position(TileNotation notation); + + +char* notation_tile_to_string(TileNotation tile); + + +void notation_tile_to_string_cpy(TileNotation tile, char* dest); + + +TileNotation notation_tile_from_string(const char* tile_string); + + +TileNotation notation_tile_new(char file, unsigned int rank); + + +// Converts +TileNotation notation_tile_from_pos(Position pos); + + +// Returns a piece character. Upper case for white, lower case for black +char notation_piece_to_char(Piece piece); + + +// Returns 1 if character is one of the piece characters, 0 otherwise +int notation_is_piece_char(char character); + + +typedef struct MoveNotation { + Piece piece; + TileNotation origin; + TileNotation target; + int move_type; +} MoveNotation; + + +char* notation_move_to_string(MoveNotation move); + + +MoveNotation* notation_move_from_string(const char* move_string); + + +MoveNotation notation_move_new(Piece piece, TileNotation origin, TileNotation target, int move_type); + + +// Converts move notation to a move +Move notation_to_move(MoveNotation notation); + +#endif \ No newline at end of file diff --git a/src/board.c b/src/board.c new file mode 100644 index 0000000..a7146ba --- /dev/null +++ b/src/board.c @@ -0,0 +1,584 @@ +/* +c3hess - Console Chess written in C +Copyright (C) 2023 Kasyanov Nikolay Alexeyevich + +This program is free software: you can redistribute it and/or modify +it under the terms of the GNU Affero General Public License as published by +the Free Software Foundation, either version 3 of the License, or +(at your option) any later version. + +This program is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU Affero General Public License for more details. + +You should have received a copy of the GNU Affero General Public License +along with this program. If not, see . +*/ + + +#include "board.h" +#include "tile.h" +#include "position.h" +#include "util.h" +#include "algebraic_notation.h" +#include +#include + + + +// Returns a newly allocated chess board with pieces placed +Board* board_new_default() { + Board* board = NULL; + + board = (Board*) malloc(sizeof(Board) * 1); + if (!board) { + return NULL; + } + + board->rows = 8; + board->columns = 8; + board->tiles = (Tile*) malloc(sizeof(Tile) * (board->rows * board->columns)); + if (!board->tiles) { + free(board); + return NULL; + } + + // Initialize the board with empty tiles + for (int r = 0; r < board->rows; r++) { + for (int c = 0; c < board->columns; c++) { + board->tiles[r * board->columns + c] = tile_new_empty(position_new(r, c)); + } + } + + // Put pieces into their initial positions + + // White + board_place_piece(board, position_new(0, 0), piece_new(WHITE, ROOK)); + board_place_piece(board, position_new(0, 1), piece_new(WHITE, KNIGHT)); + board_place_piece(board, position_new(0, 2), piece_new(WHITE, BISHOP)); + board_place_piece(board, position_new(0, 3), piece_new(WHITE, KING)); + board_place_piece(board, position_new(0, 4), piece_new(WHITE, QUEEN)); + board_place_piece(board, position_new(0, 5), piece_new(WHITE, BISHOP)); + board_place_piece(board, position_new(0, 6), piece_new(WHITE, KNIGHT)); + board_place_piece(board, position_new(0, 7), piece_new(WHITE, ROOK)); + board_place_piece(board, position_new(1, 0), piece_new(WHITE, PAWN)); + board_place_piece(board, position_new(1, 1), piece_new(WHITE, PAWN)); + board_place_piece(board, position_new(1, 2), piece_new(WHITE, PAWN)); + board_place_piece(board, position_new(1, 3), piece_new(WHITE, PAWN)); + board_place_piece(board, position_new(1, 4), piece_new(WHITE, PAWN)); + board_place_piece(board, position_new(1, 5), piece_new(WHITE, PAWN)); + board_place_piece(board, position_new(1, 6), piece_new(WHITE, PAWN)); + board_place_piece(board, position_new(1, 7), piece_new(WHITE, PAWN)); + + // Black + board_place_piece(board, position_new(7, 0), piece_new(BLACK, ROOK)); + board_place_piece(board, position_new(7, 1), piece_new(BLACK, KNIGHT)); + board_place_piece(board, position_new(7, 2), piece_new(BLACK, BISHOP)); + board_place_piece(board, position_new(7, 3), piece_new(BLACK, KING)); + board_place_piece(board, position_new(7, 4), piece_new(BLACK, QUEEN)); + board_place_piece(board, position_new(7, 5), piece_new(BLACK, BISHOP)); + board_place_piece(board, position_new(7, 6), piece_new(BLACK, KNIGHT)); + board_place_piece(board, position_new(7, 7), piece_new(BLACK, ROOK)); + board_place_piece(board, position_new(6, 0), piece_new(BLACK, PAWN)); + board_place_piece(board, position_new(6, 1), piece_new(BLACK, PAWN)); + board_place_piece(board, position_new(6, 2), piece_new(BLACK, PAWN)); + board_place_piece(board, position_new(6, 3), piece_new(BLACK, PAWN)); + board_place_piece(board, position_new(6, 4), piece_new(BLACK, PAWN)); + board_place_piece(board, position_new(6, 5), piece_new(BLACK, PAWN)); + board_place_piece(board, position_new(6, 6), piece_new(BLACK, PAWN)); + board_place_piece(board, position_new(6, 7), piece_new(BLACK, PAWN)); + + + return board; +} + + +/* +Returns a newly allocated chess board with custom amount of +rows and columns, without pieces placed +*/ +Board* board_new_empty_custom(unsigned int rows, unsigned int columns) { + Board* board = NULL; + return board; +} + + +// Frees up board and sets the pointer to it to NULL +void board_delete(Board** board) { + if (board == NULL) { + return; + } else if (*board == NULL) { + return; + } + + free((*board)->tiles); + free(*board); + *board = NULL; + + return; +} + + +// Prints board to some FILE +void board_print(const Board* board, FILE* out) { + if (!board || !out) { + return; + } + + // Files + fputc(' ', out); + for (unsigned int i = 0; i < board->columns; i++) { + if (i > 0) { + fputc(' ', out); + } + fputc(0x61 + i, out); + } + fputc('\n', out); + + + // Upper border + fputc(' ', out); + for (unsigned int i = 0; i < board->columns; i++) { + if (i + 1 != board->columns) { + fputc('_', out); + } + fputc('_', out); + } + fputc('\n', out); + + + for (unsigned int r = 0; r < board->rows; r++) { + // Left border + fputc('|', out); + + for (unsigned int c = 0; c < board->columns; c++) { + // Tile + char tile_character = '\0'; + + if ((r + c) % 2 == 0) { + // tile_character = '▓'; + tile_character = '#'; + } else { + // tile_character = '░'; + tile_character = ' '; + } + + Tile* tile = board_get_tile(board, position_new(r, c)); + if (tile->piece.type != NONE) { + tile_character = notation_piece_to_char(tile->piece); + } + + if (c > 0) { + fputc(' ', out); + } + fputc(tile_character, out); + } + + // Right border + fputc('|', out); + + + // Ranks + fprintf(out, " %d", board->rows - r); + + fputc('\n', out); + } + + // Lower border + fputc(' ', out); + for (unsigned int i = 0; i < board->columns; i++) { + if (i + 1 != board->columns) { + fputc('-', out); + } + fputc('-', out); + } + fputc('\n', out); + + + return; +} + + +// Checks if given tile position is in bounds on this board. Returns 1 if it is, 0 - otherwise +int board_is_tile_in_bounds(const Board* board, Position pos) { + if (pos.row >= board->rows || pos.column >= board->columns) { + return 0; + } + + return 1; +} + + + +// Retrieves a tile on provided position. If available - returns a pointer to it, if not - returns NULL +Tile* board_get_tile_raw(const Board* board, Position pos) { + if (!board) { + return NULL; + } + + if (!board_is_tile_in_bounds(board, pos)) { + return NULL; + } + + return &board->tiles[(pos.row * board->columns) + pos.column]; +} + + +/* +Retrieves a tile on provided position as if (0, 0) is the bottom left tile. If available +- returns a pointer to it, if not - returns NULL. +*/ +Tile* board_get_tile(const Board* board, Position pos) { + /* + Invert position so, for example (0, 0) would be the leftmost + tile on the bottom (as it should be) + */ + Position inverted_pos = position_new( + _sub_abs(pos.row + 1, board->rows), + _sub_abs(pos.column + 1, board->columns) + ); + + return board_get_tile_raw(board, inverted_pos); +} + + +// Returns all tiles with pieces on them on the board +Tile** board_get_occupied_tiles(const Board* board) { + if (!board) { + return NULL; + } + + unsigned int i = 0; + Tile** occupied_tiles = (Tile**) malloc(sizeof(Tile) * board->rows * board->columns); + if (!occupied_tiles) { + return NULL; + } + + // Loop through the whole board + Tile* tile = NULL; + for (unsigned int r = 0; r < board->rows; r++) { + for (unsigned int c = 0; c < board->columns; c++) { + // Always in bounds + if (board_is_tile_occupied(board, position_new(r, c))) { + // It is occupied! + occupied_tiles[i] = tile; + i++; + } + } + } + + // Realloc + occupied_tiles = realloc(occupied_tiles, sizeof(Tile) * i); + + return occupied_tiles; +} + + +// Places a piece on a tile with provided position. Returns 1 if the piece has been placed, 0 if position is out of bounds +int board_place_piece(Board* board, Position pos, Piece piece) { + if (!board) { + return 0; + } + + /* + Invert position so, for example (0, 0) would be the leftmost + tile on the bottom (as it should be) + */ + Position inverted_pos = position_new( + _sub_abs(pos.row + 1, board->rows), + _sub_abs(pos.column + 1, board->columns) + ); + + Tile* tile = board_get_tile(board, inverted_pos); + if (!tile) { + return 0; + } + + // Place the piece + tile->piece = piece; + + return 1; +} + + +// Checks if a tile of given position is occupied or not. Returns 1 if it is occupied, 0 - otherwise +int board_is_tile_occupied(const Board* board, Position pos) { + if (!board) { + return 0; + } + + Tile* tile = board_get_tile(board, pos); + if (!tile) { + return 0; + } + + if (tile->piece.type == NONE) { + return 0; + } + + return 1; +} + + +/* +Returns all possible legal positions either in diagonal or in straight lines + +If mode is 0 - returns positions in straight lines, 1 - in diagonals, 2 - in both +*/ +Position* board_get_moves(const Board* board, const Tile* piece_tile, int mode, unsigned int* pos_count) { + if (!board || !piece_tile || !pos_count) { + return NULL; + } + + unsigned int i = 0; + Position* legal_moves = (Position*) malloc(sizeof(Position) * board->rows * board->columns); + if (!legal_moves) { + return NULL; + } + + switch (mode) { + case 0: { + for (unsigned int j = 0; j < 4; j++) { + int vx = CARDINALS[j].x; + int vy = CARDINALS[j].y; + + int xtmp = piece_tile->position.row + vx; + int ytmp = piece_tile->position.column + vy; + while (board_is_tile_in_bounds(board, position_new(xtmp, ytmp))) { + Tile* tile = board_get_tile(board, position_new(xtmp, ytmp)); + if (tile->piece.type == NONE) { + legal_moves[i] = tile->position; + i++; + } else if (tile->piece.color != piece_tile->piece.color) { + legal_moves[i] = tile->position; + i++; + break; // Don't proceed + } else { + break; + } + + xtmp = xtmp + vx; + ytmp = ytmp + vy; + } + } + break; + } + + case 1: { + for (unsigned int j = 0; j < 4; j++) { + int vx = DIAGONALS[j].x; + int vy = DIAGONALS[j].y; + + int xtmp = piece_tile->position.row + vx; + int ytmp = piece_tile->position.column + vy; + while (board_is_tile_in_bounds(board, position_new(xtmp, ytmp))) { + Tile* tile = board_get_tile(board, position_new(xtmp, ytmp)); + if (tile->piece.type == NONE) { + legal_moves[i] = tile->position; + i++; + } else if (tile->piece.color != piece_tile->piece.color) { + legal_moves[i] = tile->position; + i++; + break; // Don't proceed + } else { + break; + } + + xtmp = xtmp + vx; + ytmp = ytmp + vy; + } + } + break; + } + + case 2: { + for (unsigned int j = 0; j < 4; j++) { + int vx = CARDINALS[j].x; + int vy = CARDINALS[j].y; + + int xtmp = piece_tile->position.row + vx; + int ytmp = piece_tile->position.column + vy; + while (board_is_tile_in_bounds(board, position_new(xtmp, ytmp))) { + Tile* tile = board_get_tile(board, position_new(xtmp, ytmp)); + if (tile->piece.type == NONE) { + legal_moves[i] = tile->position; + i++; + } else if (tile->piece.color != piece_tile->piece.color) { + legal_moves[i] = tile->position; + i++; + break; // Don't proceed + } else { + break; + } + + xtmp = xtmp + vx; + ytmp = ytmp + vy; + } + } + + for (unsigned int j = 0; j < 4; j++) { + int vx = DIAGONALS[j].x; + int vy = DIAGONALS[j].y; + + int xtmp = piece_tile->position.row + vx; + int ytmp = piece_tile->position.column + vy; + while (board_is_tile_in_bounds(board, position_new(xtmp, ytmp))) { + Tile* tile = board_get_tile(board, position_new(xtmp, ytmp)); + if (tile->piece.type == NONE) { + legal_moves[i] = tile->position; + i++; + } else if (tile->piece.color != piece_tile->piece.color) { + legal_moves[i] = tile->position; + i++; + break; // Don't proceed + } else { + break; + } + + xtmp = xtmp + vx; + ytmp = ytmp + vy; + } + } + break; + } + + default: { + return NULL; + } + } + + legal_moves = realloc(legal_moves, sizeof(Position) * i); + *pos_count = i; + + return legal_moves; +} + + +// Returns all possible legal rook moves. Returns NULL if given tile does not contain a rook piece +Position* board_get_rook_moves(const Board* board, const Tile* rook_tile, unsigned int* pos_count) { + if (!board || !rook_tile || !pos_count) { + return NULL; + } + + if (rook_tile->piece.type != ROOK) { + return NULL; + } + + + return board_get_moves(board, rook_tile, 0, pos_count); +} + + +/* +Checks if a move is legal on this board. + +Returns 1 - if the move is legal, 0 - otherwise +*/ +int board_is_move_legal(const Board* board, Move move) { + // Check if the tiles are not out of bounds + if (!board_is_tile_in_bounds(board, move.origin) || + !board_is_tile_in_bounds(board, move.target) + ) { + + return 0; + } + + // Check if there is a piece at all + if (board_get_tile(board, move.origin)->piece.type == NONE) { + return 0; + } + + Tile* origin_tile = board_get_tile(board, move.origin); + Tile* target_tile = board_get_tile(board, move.target); + + // Check based on the piece type + Piece origin_piece = origin_tile->piece; + switch (origin_piece.type) { + case KING: { + if (position_distance(move.origin, move.target) > 1) { + // Too far away + return 0; + } + + // See if the target tile is occupied or not + if (tile_is_occupied(*target_tile)) { + // The tile is occupied + if (target_tile->piece.color == origin_piece.color) { + // The pieces are allied, can't go there + return 0; + } + } + + return 1; + } + + case QUEEN: { + return 1; + } + + case ROOK: { + unsigned int pos_count = 0; + Position* legal_positions = board_get_rook_moves( + board, + board_get_tile(board, move.origin), + &pos_count + ); + + for (unsigned int i = 0; i < pos_count; i++) { + if (legal_positions[i].row == move.target.row && + legal_positions[i].column == move.target.column + ) + { + // This position is allowed to be moved to + free(legal_positions); + return 1; + } + } + + free(legal_positions); + return 0; + } + + case KNIGHT: { + return 1; + } + + case BISHOP: { + return 1; + } + + case PAWN: { + return 1; + } + + default: { + // Non reachable + return 0; + } + } +} + + +/* +Moves piece from one place to other, +checking whether it is a legal move or not. + +Returns 1 if a move has been successfully done, +0 - if it is an illegal move +*/ +int board_process_move(Board* board, Move move) { + if (!board_is_move_legal(board, move)) { + return 0; + } + + // The tiles are legal, no need to re-check + Tile* tile_origin = board_get_tile(board, move.origin); + Tile* tile_target = board_get_tile(board, move.target); + + // Move the piece from one tile to another + tile_target->piece = tile_origin->piece; + tile_origin->piece.type = NONE; + + return 1; +} \ No newline at end of file diff --git a/src/board.h b/src/board.h new file mode 100644 index 0000000..f173262 --- /dev/null +++ b/src/board.h @@ -0,0 +1,143 @@ +/* +c3hess - Console Chess written in C +Copyright (C) 2023 Kasyanov Nikolay Alexeyevich + +This program is free software: you can redistribute it and/or modify +it under the terms of the GNU Affero General Public License as published by +the Free Software Foundation, either version 3 of the License, or +(at your option) any later version. + +This program is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU Affero General Public License for more details. + +You should have received a copy of the GNU Affero General Public License +along with this program. If not, see . +*/ + + +#ifndef board_h +#define board_h + +#include "tile.h" +#include "move.h" +#include "position.h" +#include "piece.h" +#include + + +typedef struct Vec2 { + int x; + int y; +} Vec2; + + +static const Vec2 CARDINALS[4] = { + {x: 1, y: 0}, {x: 0, y: 1}, + {x: -1, y: 0}, {x: 0, y: -1} +}; + + +static const Vec2 DIAGONALS[4] = { + {x: 1, y: 1}, {x: -1, y: 1}, + {x: 1, y: -1}, {x: -1, y: -1} +}; + + +static const Vec2 KNIGHTDELTAS[8] = { + {x: 1, y: 2}, {x: 2, y: 1}, + {x: -1, y: 2}, {x: -2, y: 1}, + {x: 1, y: -2}, {x: 2, y: -1}, + {x: -1, y: -2}, {x: -2, y: -1} +}; + + +typedef struct Board { + unsigned int rows; + unsigned int columns; + Tile* tiles; +} Board; + + +// Returns a newly allocated chess board with pieces placed +Board* board_new_default(); + + +/* +Returns a newly allocated chess board with custom amount of +rows and columns, without pieces placed +*/ +Board* board_new_empty_custom(unsigned int rows, unsigned int columns); + + +// Frees up board and sets the pointer to it to NULL +void board_delete(Board** board); + + +// Checks if given tile position is in bounds on this board. Returns 1 if it is, 0 - otherwise +int board_is_tile_in_bounds(const Board* board, Position pos); + + +// Places a piece on a tile with provided position. Returns 1 if the piece has been placed, 0 if position is out of bounds +int board_place_piece(Board* board, Position pos, Piece piece); + + +// Retrieves a tile on provided position. If available - returns a pointer to it, if not - returns NULL +Tile* board_get_tile_raw(const Board* board, Position pos); + + +/* +Retrieves a tile on provided position as if (0, 0) is the bottom left tile. If available +- returns a pointer to it, if not - returns NULL. +*/ +Tile* board_get_tile(const Board* board, Position pos); + + +// Returns all tiles with pieces on them on the board +Tile** board_get_occupied_tiles(const Board* board); + + +// Checks if a tile of given position is occupied or not. Returns 1 if it is occupied, 0 - otherwise +int board_is_tile_occupied(const Board* board, Position pos); + + + +// Prints board to some FILE +void board_print(const Board* board, FILE* out); + + +/* +Returns all possible legal positions either in diagonal or in straight lines + +If mode is 0 - returns positions in straight lines, 1 - in diagonals, 2 - in both +*/ +Position* board_get_moves(const Board* board, const Tile* piece_tile, int mode, unsigned int* pos_count); + + +// Returns all possible legal king positions. Returns NULL if given tile does not contain a king piece +Position* board_get_king_moves(const Board* board, const Tile* king_tile, unsigned int* pos_count); + + +// Returns all possible legal king positions. Returns NULL if given tile does not contain a rook piece +Position* board_get_rook_moves(const Board* board, const Tile* rook_tile, unsigned int* pos_count); + + +/* +Checks if a move is legal on this board. + +Returns 1 - if the move is legal, 0 - otherwise +*/ +int board_is_move_legal(const Board* board, Move move); + + +/* +Moves piece from one place to other, +checking whether it is a legal move or not. + +Returns 1 if a move has been successfully done, +0 - if it is an illegal move +*/ +int board_process_move(Board* board, Move move); + +#endif \ No newline at end of file diff --git a/src/chess.c b/src/chess.c new file mode 100644 index 0000000..594309d --- /dev/null +++ b/src/chess.c @@ -0,0 +1,157 @@ +/* +c3hess - Console Chess written in C +Copyright (C) 2023 Kasyanov Nikolay Alexeyevich + +This program is free software: you can redistribute it and/or modify +it under the terms of the GNU Affero General Public License as published by +the Free Software Foundation, either version 3 of the License, or +(at your option) any later version. + +This program is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU Affero General Public License for more details. + +You should have received a copy of the GNU Affero General Public License +along with this program. If not, see . +*/ + + +#include "chess.h" +#include "algebraic_notation.h" +#include + + +Chess* chess_new(Options options) { + if (!options.input || !options.output) { + return NULL; + } + + Chess* game = (Chess*) malloc(sizeof(Chess) * 1); + if (!game) { + return NULL; + } + + game->board = board_new_default(); + game->moves_made = 0; + game->turn = WHITE; + game->state = READY; + game->options = options; + + return game; +} + + +void chess_delete(Chess** chess) { + if (!chess) { + return; + } + + if (!*chess) { + return; + } + + + board_delete(&(*chess)->board); + free(*chess); + *chess = NULL; + + return; +} + + +void chess_display(const Chess* chess) { + char* color_string = color_to_string(chess->turn); + fprintf( + chess->options.output, + "[%s to move; %d moves made]\n\n", + color_string, + chess->moves_made + ); + free(color_string); + + board_print(chess->board, chess->options.output); + fprintf(chess->options.output, "\n"); + + return; +} + + +Move* chess_take_move_input(Chess* chess) { + if (!chess) { + return NULL; + } + + // Ask for input + fprintf(chess->options.output, "Move: "); + char* input = (char*) malloc(sizeof(char) * 64); + input = fgets(input, 64, chess->options.input); + + // Try to parse input + MoveNotation* move_notation = notation_move_from_string(input); + if (!move_notation) { + // Failed! + return NULL; + } + + // Convert it to a useable move + Move* move = (Move*) malloc(sizeof(Move) * 1); + if (!move) { + free(move_notation); + return NULL; + } + *move = notation_to_move(*move_notation); + free(move_notation); + + return move; +} + + +void chess_toggle_turn(Chess* chess) { + if (!chess) { + return; + } + + if (chess->turn == WHITE) { + chess->turn = BLACK; + } else { + chess->turn = WHITE; + } + + return; +} + + +void chess_next_turn(Chess* chess) { + if (!chess) { + return; + } + + // Keep asking for a legitimate move + Move* move = NULL; + int result = 0; + while (1) { + // Get a move + move = chess_take_move_input(chess); + if (!move) { + printf("Invalid move input!\n"); + continue; + } + + // Make a move + result = board_process_move(chess->board, *move); + if (!result) { + printf("Illegal move!\n"); + free(move); + continue; + } + + break; + } + free(move); + + chess->moves_made++; + chess_toggle_turn(chess); + + return; +} \ No newline at end of file diff --git a/src/chess.h b/src/chess.h new file mode 100644 index 0000000..2d406c9 --- /dev/null +++ b/src/chess.h @@ -0,0 +1,72 @@ +/* +c3hess - Console Chess written in C +Copyright (C) 2023 Kasyanov Nikolay Alexeyevich + +This program is free software: you can redistribute it and/or modify +it under the terms of the GNU Affero General Public License as published by +the Free Software Foundation, either version 3 of the License, or +(at your option) any later version. + +This program is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU Affero General Public License for more details. + +You should have received a copy of the GNU Affero General Public License +along with this program. If not, see . +*/ + + +#ifndef chess_h +#define chess_h + + +#include +#include "board.h" + + +typedef enum GameState { + READY, + RUNNING, + WHITEWON, + BLACKWON +} GameState; + + +typedef struct Options { + FILE* input; + FILE* output; + int use_ansi; +} Options; + + +typedef struct Chess { + Board* board; + Color turn; + unsigned int moves_made; + unsigned int timer_white_ms; + unsigned int timer_black_ms; + GameState state; + Options options; +} Chess; + + +Chess* chess_new(Options options); + + +void chess_display(const Chess* chess); + + +Move* chess_take_move_input(Chess* chess); + + +void chess_toggle_turn(Chess* chess); + + +void chess_next_turn(Chess* chess); + + +void chess_delete(Chess** chess); + + +#endif \ No newline at end of file diff --git a/src/main.c b/src/main.c new file mode 100644 index 0000000..7d10f72 --- /dev/null +++ b/src/main.c @@ -0,0 +1,82 @@ +/* +c3hess - Console Chess written in C +Copyright (C) 2023 Kasyanov Nikolay Alexeyevich + +This program is free software: you can redistribute it and/or modify +it under the terms of the GNU Affero General Public License as published by +the Free Software Foundation, either version 3 of the License, or +(at your option) any later version. + +This program is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU Affero General Public License for more details. + +You should have received a copy of the GNU Affero General Public License +along with this program. If not, see . +*/ + + +#include +#include +#include +#include "chess.h" + + +const char* VERSION = "0.1.0"; + +int main(int argc, const char** argv) { + int use_ansi = 0; + + unsigned int i = 0; + while (i < (unsigned int) argc) { + if (strcmp(argv[i], "-h") == 0 || strcmp(argv[i], "--help") == 0) { + printf( + "chess -[h|v|na]\n\n\ +-h --help -> prints this help message\n\ +-v --version -> prints version information\n\ +-a --ansi -> use ANSI escape codes to output colors\n\ +" + ); + return 0; + } + + if (strcmp(argv[i], "-v") == 0 || strcmp(argv[i], "--version") == 0) { + printf( + "c3hess v%s\n(C) 2023 Kasyanov Nikolay Alexeyevich (Unbewohnte)\n\n\ +This program is free software: you can redistribute it and/or modify\n\ +it under the terms of the GNU Affero General Public License as published by\n\ +the Free Software Foundation, either version 3 of the License, or\n\ +(at your option) any later version.\n\ +\n\ +This program is distributed in the hope that it will be useful,\n\ +but WITHOUT ANY WARRANTY; without even the implied warranty of\n\ +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\n\ +GNU Affero General Public License for more details.\n\ +\n\ +You should have received a copy of the GNU Affero General Public License\n\ +along with this program. If not, see .\n", VERSION); + return 0; + } + + if (strcmp(argv[i], "-na") == 0 || strcmp(argv[i], "--no-ansi") == 0) { + use_ansi = 1; + } + + i++; + } + + Chess* game = chess_new((Options) { + input: stdin, + output: stdout, + use_ansi: use_ansi + }); + game->state = RUNNING; + while (game->state == RUNNING) { + chess_display(game); + chess_next_turn(game); + } + chess_delete(&game); + + return 0; +} \ No newline at end of file diff --git a/src/move.c b/src/move.c new file mode 100644 index 0000000..0e5d748 --- /dev/null +++ b/src/move.c @@ -0,0 +1,29 @@ +/* +c3hess - Console Chess written in C +Copyright (C) 2023 Kasyanov Nikolay Alexeyevich + +This program is free software: you can redistribute it and/or modify +it under the terms of the GNU Affero General Public License as published by +the Free Software Foundation, either version 3 of the License, or +(at your option) any later version. + +This program is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU Affero General Public License for more details. + +You should have received a copy of the GNU Affero General Public License +along with this program. If not, see . +*/ + + +#include "move.h" + + +Move move_new(Position origin, Position target) { + Move move; + move.origin = origin; + move.target = target; + + return move; +} \ No newline at end of file diff --git a/src/move.h b/src/move.h new file mode 100644 index 0000000..14324a8 --- /dev/null +++ b/src/move.h @@ -0,0 +1,46 @@ +/* +c3hess - Console Chess written in C +Copyright (C) 2023 Kasyanov Nikolay Alexeyevich + +This program is free software: you can redistribute it and/or modify +it under the terms of the GNU Affero General Public License as published by +the Free Software Foundation, either version 3 of the License, or +(at your option) any later version. + +This program is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU Affero General Public License for more details. + +You should have received a copy of the GNU Affero General Public License +along with this program. If not, see . +*/ + + +#ifndef move_h +#define move_h + +#include "piece.h" +#include "position.h" + + +typedef enum MoveType { + MOVE = 1 << 0, + LONGCASTLE = 1 << 1, + SHORTCASTLE = 1 << 2, + CHECK = 1 << 3, + CHECKMATE = 1 << 4, + PROMOTION = 1 << 5, + CAPTURE = 1 << 6 +} MoveType; + + +typedef struct Move { + Position origin; + Position target; +} Move; + + +Move move_new(Position origin, Position target); + +#endif \ No newline at end of file diff --git a/src/piece.c b/src/piece.c new file mode 100644 index 0000000..425f0fc --- /dev/null +++ b/src/piece.c @@ -0,0 +1,59 @@ +/* +c3hess - Console Chess written in C +Copyright (C) 2023 Kasyanov Nikolay Alexeyevich + +This program is free software: you can redistribute it and/or modify +it under the terms of the GNU Affero General Public License as published by +the Free Software Foundation, either version 3 of the License, or +(at your option) any later version. + +This program is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU Affero General Public License for more details. + +You should have received a copy of the GNU Affero General Public License +along with this program. If not, see . +*/ + + +#include "piece.h" +#include +#include + + +// Color to a string representation +char* color_to_string(Color color) { + char* color_string = (char*) malloc(sizeof(char) * 6); + if (!color_string) { + return NULL; + } + + switch (color) { + case WHITE: { + strcpy(color_string, "WHITE\0"); + break; + } + case BLACK: { + strcpy(color_string, "BLACK\0"); + break; + } + + default: { + free(color_string); + return NULL; + } + } + + return color_string; +} + + +// Creates a new piece +Piece piece_new(Color color, PieceType type) { + Piece new_piece; + new_piece.color = color; + new_piece.type = type; + + return new_piece; +} \ No newline at end of file diff --git a/src/piece.h b/src/piece.h new file mode 100644 index 0000000..7719467 --- /dev/null +++ b/src/piece.h @@ -0,0 +1,57 @@ +/* +c3hess - Console Chess written in C +Copyright (C) 2023 Kasyanov Nikolay Alexeyevich + +This program is free software: you can redistribute it and/or modify +it under the terms of the GNU Affero General Public License as published by +the Free Software Foundation, either version 3 of the License, or +(at your option) any later version. + +This program is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU Affero General Public License for more details. + +You should have received a copy of the GNU Affero General Public License +along with this program. If not, see . +*/ + + +#ifndef piece_h +#define piece_h + + +// Color of a piece +typedef enum Color { + WHITE, + BLACK +} Color; + + +// Color to a string representation +char* color_to_string(Color color); + + +// Piece type enumeration +typedef enum PieceType { + NONE, + KING, + QUEEN, + ROOK, + BISHOP, + KNIGHT, + PAWN +} PieceType; + + +typedef struct Piece { + Color color; + PieceType type; +} Piece; + + +// Creates a new piece +Piece piece_new(Color color, PieceType type); + + +#endif \ No newline at end of file diff --git a/src/position.c b/src/position.c new file mode 100644 index 0000000..ab122e3 --- /dev/null +++ b/src/position.c @@ -0,0 +1,138 @@ +/* +c3hess - Console Chess written in C +Copyright (C) 2023 Kasyanov Nikolay Alexeyevich + +This program is free software: you can redistribute it and/or modify +it under the terms of the GNU Affero General Public License as published by +the Free Software Foundation, either version 3 of the License, or +(at your option) any later version. + +This program is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU Affero General Public License for more details. + +You should have received a copy of the GNU Affero General Public License +along with this program. If not, see . +*/ + + +#include "position.h" +#include "util.h" + + +// Returns a copy of a new position +Position position_new(unsigned int row, unsigned int column) { + Position new_pos; + new_pos.row = row; + new_pos.column = column; + + return new_pos; +} + + +// Returns 1 if position (which) is diagonal to the other (to_which) position, 0 - otherwise +int position_is_diagonal_to(Position which, Position to_which) { + if (_sub_abs(which.column, to_which.column) == _sub_abs(which.row, to_which.row)) { + return 1; + } + + return 0; +} + + +// Returns 1 if position (which) is in a straight (not diagonal) line to the other one (to_which), returns 0 if not +int position_is_straight_to(Position which, Position to_which) { + if (which.row == to_which.row || which.column == to_which.column) { + return 1; + } + + return 0; +} + + +// Returns a diagonal distance between two positions +int position_diagonal_distance(Position which, Position to_which) { + return _sub_abs(which.column, to_which.column); +} + + +int _max(int x, int y) { + if (x > y) { + return x; + } + + return y; +} + +// Returns a distance between the two tile positions +int position_distance(Position which, Position to_which) { + // 0 0 - 1 1 gives 1 + // 0 0 - 2 0 gives 2 + // 0 0 - 0 3 gives 3 + return _max(_sub_abs(which.row, to_which.row), _sub_abs(which.column, to_which.column)); +} + + +// Returns a position with the row incremented +Position position_up(Position pos) { + return position_new(pos.row + 1, pos.column); +} + +// Returns a position with the row decremented +Position position_down(Position pos) { + if (pos.row == 0) { + return pos; + } + + return position_new(pos.row - 1, pos.column); +} + +// Returns a position with the column decremented +Position position_left(Position pos) { + if (pos.column == 0) { + return pos; + } + + return position_new(pos.row, pos.column - 1); +} + +// Returns a position with the column incremented +Position position_right(Position pos) { + return position_new(pos.row, pos.column + 1); +} + + +// Returns a position with the row incremented and column incremented +Position position_up_right(Position pos) { + return position_new(pos.row + 1, pos.column + 1); +} + + +// Returns a position with the row incremented and column decremented +Position position_up_left(Position pos) { + if (pos.column == 0) { + return pos; + } + + return position_new(pos.row + 1, pos.column - 1); +} + +// Returns a position with the row decremented and column incremented +Position position_down_right(Position pos) { + if (pos.row == 0) { + return pos; + } + + return position_new(pos.row - 1, pos.column + 1); +} + + +// Returns a position with the row decremented and column decremented +Position position_down_left(Position pos) { + if (pos.row == 0 || pos.column == 0) { + return pos; + } + + return position_new(pos.row - 1, pos.column - 1); +} \ No newline at end of file diff --git a/src/position.h b/src/position.h new file mode 100644 index 0000000..a1a2add --- /dev/null +++ b/src/position.h @@ -0,0 +1,79 @@ +/* +c3hess - Console Chess written in C +Copyright (C) 2023 Kasyanov Nikolay Alexeyevich + +This program is free software: you can redistribute it and/or modify +it under the terms of the GNU Affero General Public License as published by +the Free Software Foundation, either version 3 of the License, or +(at your option) any later version. + +This program is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU Affero General Public License for more details. + +You should have received a copy of the GNU Affero General Public License +along with this program. If not, see . +*/ + + +#ifndef position_h +#define position_h + +typedef struct Position { + unsigned int row; + unsigned int column; +} Position; + + +// Returns a copy of a new position +Position position_new(unsigned int row, unsigned int column); + + +// Returns 1 if position (which) is diagonal to the other (to_which) position, 0 - otherwise +int position_is_diagonal_to(Position which, Position to_which); + + +// Returns 1 if position (which) is in a straight (not diagonal) line to the other one (to_which), returns 0 if not +int position_is_straight_to(Position which, Position to_which); + + +// Returns a diagonal distance between two positions +int position_diagonal_distance(Position which, Position to_which); + + +// Returns a distance between the two tile positions +int position_distance(Position which, Position to_which); + + +// Returns a position with the row incremented +Position position_up(Position pos); + + +// Returns a position with the row decremented +Position position_down(Position pos); + + +// Returns a position with the column decremented +Position position_left(Position pos); + + +// Returns a position with the column incremented +Position position_right(Position pos); + + +// Returns a position with the row incremented and column incremented +Position position_up_right(Position pos); + + +// Returns a position with the row incremented and column decremented +Position position_up_left(Position pos); + +// Returns a position with the row decremented and column incremented +Position position_down_right(Position pos); + + +// Returns a position with the row decremented and column decremented +Position position_down_left(Position pos); + +#endif \ No newline at end of file diff --git a/src/tile.c b/src/tile.c new file mode 100644 index 0000000..30f0724 --- /dev/null +++ b/src/tile.c @@ -0,0 +1,50 @@ +/* +c3hess - Console Chess written in C +Copyright (C) 2023 Kasyanov Nikolay Alexeyevich + +This program is free software: you can redistribute it and/or modify +it under the terms of the GNU Affero General Public License as published by +the Free Software Foundation, either version 3 of the License, or +(at your option) any later version. + +This program is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU Affero General Public License for more details. + +You should have received a copy of the GNU Affero General Public License +along with this program. If not, see . +*/ + + +#include "tile.h" +#include + +// Creates a copy of a new tile +Tile tile_new(Position position, Piece piece) { + Tile tile; + tile.position = position; + tile.piece = piece; + + return tile; +} + + +// Creates a copy of an empty tile +Tile tile_new_empty(Position position) { + Tile tile; + tile.position = position; + tile.piece.type = NONE; + + return tile; +} + + +// Returns 1 if the tile is occupied and 0 if it is not +int tile_is_occupied(Tile tile) { + if (tile.piece.type == NONE) { + return 0; + } + + return 1; +} \ No newline at end of file diff --git a/src/tile.h b/src/tile.h new file mode 100644 index 0000000..fc2753e --- /dev/null +++ b/src/tile.h @@ -0,0 +1,46 @@ +/* +c3hess - Console Chess written in C +Copyright (C) 2023 Kasyanov Nikolay Alexeyevich + +This program is free software: you can redistribute it and/or modify +it under the terms of the GNU Affero General Public License as published by +the Free Software Foundation, either version 3 of the License, or +(at your option) any later version. + +This program is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU Affero General Public License for more details. + +You should have received a copy of the GNU Affero General Public License +along with this program. If not, see . +*/ + + +#ifndef tile_h +#define tile_h + +#include "piece.h" +#include "position.h" + +typedef struct Tile { + Position position; + Piece piece; +} Tile; + + +// Creates a copy of a new tile +Tile tile_new(Position position, Piece piece); + + +// Creates a copy of an empty tile +Tile tile_new_empty(Position position); + + +// Returns 1 if the tile is occupied and 0 if it is not +int tile_is_occupied(Tile tile); + + + + +#endif \ No newline at end of file diff --git a/src/util.c b/src/util.c new file mode 100644 index 0000000..0b94c62 --- /dev/null +++ b/src/util.c @@ -0,0 +1,30 @@ +/* +c3hess - Console Chess written in C +Copyright (C) 2023 Kasyanov Nikolay Alexeyevich + +This program is free software: you can redistribute it and/or modify +it under the terms of the GNU Affero General Public License as published by +the Free Software Foundation, either version 3 of the License, or +(at your option) any later version. + +This program is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU Affero General Public License for more details. + +You should have received a copy of the GNU Affero General Public License +along with this program. If not, see . +*/ + + +#include "util.h" + + +// Subtracts smaller value from bigger value +unsigned int _sub_abs(unsigned int x, unsigned int y) { + if (x > y) { + return x - y; + } + + return y - x; +} \ No newline at end of file diff --git a/src/util.h b/src/util.h new file mode 100644 index 0000000..e2d17e3 --- /dev/null +++ b/src/util.h @@ -0,0 +1,27 @@ +/* +c3hess - Console Chess written in C +Copyright (C) 2023 Kasyanov Nikolay Alexeyevich + +This program is free software: you can redistribute it and/or modify +it under the terms of the GNU Affero General Public License as published by +the Free Software Foundation, either version 3 of the License, or +(at your option) any later version. + +This program is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU Affero General Public License for more details. + +You should have received a copy of the GNU Affero General Public License +along with this program. If not, see . +*/ + + +#ifndef util_h +#define util_h + +// Subtracts smaller value from bigger value +unsigned int _sub_abs(unsigned int x, unsigned int y); + + +#endif \ No newline at end of file