summaryrefslogtreecommitdiff
path: root/chess.c
diff options
context:
space:
mode:
Diffstat (limited to 'chess.c')
-rw-r--r--chess.c418
1 files changed, 0 insertions, 418 deletions
diff --git a/chess.c b/chess.c
deleted file mode 100644
index f5881fe..0000000
--- a/chess.c
+++ /dev/null
@@ -1,418 +0,0 @@
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include "vector.h"
-#include "console.h"
-#include "chesshelpers.h"
-#include "chess.h"
-
-int main(int argc, char **argv) {
- if(argc == 2) {
- if(strcmp(argv[1], "-v") == 0 || strcmp(argv[1], "--version") == 0) {
- printf("Version 1.0.0\n");
- exit(0);
- }
- }
- //set up the board
- int boardA[8][8] = {
- { rook + 6, pawn + 6, 0, 0, 0, 0, pawn, rook },
- { knight + 6, pawn + 6, 0, 0, 0, 0, pawn, knight },
- { bishop + 6, pawn + 6, 0, 0, 0, 0, pawn, bishop },
- { queen + 6, pawn + 6, 0, 0, 0, 0, pawn, queen },
- { king + 6, pawn + 6, 0, 0, 0, 0, pawn, king },
- { bishop + 6, pawn + 6, 0, 0, 0, 0, pawn, bishop },
- { knight + 6, pawn + 6, 0, 0, 0, 0, pawn, knight },
- { rook + 6, pawn + 6, 0, 0, 0, 0, pawn, rook }
- };
- //convert the array to pointers
- int** pieces = malloc(8 * sizeof(int*));
- for(int r = 0; r < 8; r++) {
- pieces[r] = malloc(8 * sizeof(int));
- for(int c = 0; c < 8; c++) {
- pieces[r][c] = boardA[r][c];
- }
- }
- board_t board = init_board(pieces);
- int turn = 0;
- while(1) {
- //draw the board, write some info
- clear_screen();
- draw_board(board.pieces);
- printf(turn == 0 ? "\nWhite's turn\n" : "\nBlack's turn\n");
- if(is_in_check(board, turn)) {
- vectorpp_t allMoves = get_all_moves(board, turn, 0);
- int checkmate = 0;
- for(int i = 0; i < allMoves.length; i++) {
- if(allMoves.vectorps[i].length > 0) {
- checkmate = 0;
- break;
- }
- else {
- checkmate = 1;
- }
- }
- if(checkmate) {
- printf("You've been checkmated!\n");
- break;
- }
- else {
- printf("You're in check!\n");
- }
- }
- printf("Enter the coordinates of the piece you want to move\n");
- //get the selection for the piece to be moved
- vector_t selection = user_input_pos();
- int selectedPiece = board.pieces[selection.mx][selection.my];
- //check if the piece is of the right colour, and that there is a piece there
- if(selectedPiece == 0 || (selectedPiece > 6 && turn == 0) || (selectedPiece <= 6 && turn == 1)) {
- warn_user("Invalid selection!");
- continue;
- }
- printf("Selected piece: ");
- printf("%d", selectedPiece);
- printf("\n");
- vectorp_t moves = get_moves_final(board, selection, selectedPiece);
- if(moves.length == 0) {
- warn_user("That piece has no valid moves!");
- continue;
- }
- printf("Valid moves: ");
- //write all the valid moves
- for(int i = 0; i < moves.length; i++) {
- char* readable_coords = get_move_name(board, selection, moves.vectors[i]);
- printf(readable_coords);
- free(readable_coords);
- printf("; ");
- }
- printf("\nEnter the coordinates you would like to move that piece to, or enter < to go back\n");
- //get the selection for the location to move the piece to
- vector_t target = user_input_pos();
- if(target.mx == -1) {
- continue;
- }
- //check if target is in list of valid moves
- int match = 0;
- for(int i = 0; i < moves.length; i++) {
- if(moves.vectors[i].mx == target.mx && moves.vectors[i].my == target.my) {
- match = 1;
- break;
- }
- }
- if(!match) {
- warn_user("Invalid move");
- continue;
- }
- board = make_move(board, selection, target);
- free(moves.vectors);
- printf("\n");
- turn = !turn;
- }
- return 0;
-}
-//this function returns moves that will place the player in check!
-vectorp_t get_moves(board_t board, vector_t position, piece_t piece) {
- int color = 0;
- if(piece > 6) {
- color = 1;
- piece -= 6;
- }
- if(piece == pawn) {
- return get_pawn_moves(board, position, color);
- }
- else if(piece == knight) {
- return get_knight_moves(board, position, color);
- }
- else if(piece == bishop) {
- return get_bishop_moves(board, position, color);
- }
- else if(piece == rook) {
- return get_rook_moves(board, position, color);
- }
- else if(piece == queen) {
- return get_queen_moves(board, position, color);
- }
- else if(piece == king) {
- return get_king_moves(board, position, color);
- }
- else {
- return init_vectorp(0, 0);
- }
-}
-//array of arrays representing all the moves each piece of color can make
-//excludeKing flag prevents recursion with castling checks
-vectorpp_t get_all_moves(board_t board, int color, int excludeKing) {
- vectorp_t* allMoves = malloc(16 * sizeof(vectorp_t));
- int pieceCount = 0;
- for(int r = 0; r < 8; r++) {
- for(int c = 0; c < 8; c++) {
- vector_t v = init_vector(c, r);
- if(is_color(board, v, color) && (!excludeKing || (board.pieces[v.mx][v.my] != king && board.pieces[v.mx][v.my] != king + 6))) {
- allMoves[pieceCount] = get_moves(board, v, board.pieces[c][r]);
- pieceCount++;
- }
- }
- }
- allMoves = realloc(allMoves, pieceCount * sizeof(vectorp_t));
- return init_vectorpp(allMoves, pieceCount);
-}
-//returns the position of color's king
-vector_t get_king_position(board_t board, int color) {
- for(int r = 0; r < 8; r++) {
- for(int c = 0; c < 8; c++) {
- if(board.pieces[c][r] == (king + color * 6)) {
- return init_vector(c, r);
- }
- }
- }
-}
-//returns true if the player of color is currently in check
-int is_in_check(board_t board, int color) {
- int returnV = 0;
- vector_t kingPos = get_king_position(board, color);
- //get all the moves for the opponent
- vectorpp_t allMoves = get_all_moves(board, !color, 1);
- for(int i = 0; i < allMoves.length; i++) {
- vectorp_t moves = allMoves.vectorps[i];
- for(int j = 0; j < moves.length; j++) {
- if(moves.vectors[j].mx == kingPos.mx && moves.vectors[j].my == kingPos.my) {
- returnV = 1;
- }
- }
- free(moves.vectors);
- }
- free(allMoves.vectorps);
- return returnV;
-}
-//this function removes moves that place you in check
-vectorp_t get_moves_final(board_t board, vector_t position, piece_t piece) {
- int color = 0;
- if(piece > 6) {
- color = 1;
- }
- vectorp_t moves = get_moves(board, position, piece);
- //try making that move, see if it puts the player in check
- int* invalidMoves = malloc(moves.length * sizeof(int));
- int invalidMovesCount = 0;
- for(int i = 0; i < moves.length; i++) {
- board_t tempBoard = make_move(clone_board(board), position, moves.vectors[i]);
- if(is_in_check(tempBoard, color)) {
- invalidMoves[invalidMovesCount] = i;
- invalidMovesCount++;
- }
- free(tempBoard.pieces);
- }
- vectorp_t finalMoves = remove_vectors(moves, invalidMoves, invalidMovesCount);
- free(invalidMoves);
- free(moves.vectors);
- return finalMoves;
-}
-vectorp_t get_pawn_moves(board_t board, vector_t position, int color) {
- vector_t* moves = malloc(6 * sizeof(vector_t));
- int moveCount = 0;
- int forwardDir = (color == 0 ? -1 : 1);
- vector_t move1 = init_vector(position.mx, position.my + forwardDir);
- if(in_board(move1) && is_empty(board, move1)) {
- moves[moveCount] = move1;
- moveCount++;
- if(position.my == (color == 0 ? 6 : 1)) {
- vector_t move2 = init_vector(position.mx, position.my + (forwardDir * 2));
- if(is_empty(board, move2)) {
- moves[moveCount] = move2;
- moveCount++;
- }
- }
- }
- vector_t captureL = init_vector(position.mx - 1, position.my + forwardDir);
- if(in_board(captureL) && (is_color(board, captureL, !color) || would_have_been_pawn(board, captureL, !color))) {
- moves[moveCount] = captureL;
- moveCount++;
- }
- vector_t captureR = init_vector(position.mx + 1, position.my + forwardDir);
- if(in_board(captureR) && (is_color(board, captureR, !color) || would_have_been_pawn(board, captureR, !color))) {
- moves[moveCount] = captureR;
- moveCount++;
- }
- return init_vectorp(moves, moveCount);
-}
-vectorp_t get_knight_moves(board_t board, vector_t position, int color) {
- vector_t* moves = malloc(8 * sizeof(vector_t));
- int moveCount = 0;
- for(int i = 0; i < 8; i++) {
- int h = ((i == 0 || i == 1) ? 2 : (i == 2 || i == 3) ? -2 : (i == 4 || i == 5) ? 1 : -1);
- int v = ((i == 0 || i == 2) ? -1 : (i == 1 || i == 3) ? 1 : (i == 4 || i == 6) ? 2 : -2);
- vector_t move = init_vector(position.mx + h, position.my + v);
- if(in_board(move) && (is_empty(board, move) || is_color(board, move, !color))) {
- moves[moveCount] = move;
- moveCount++;
- }
- }
- return init_vectorp(moves, moveCount);
-}
-vectorp_t get_bishop_moves(board_t board, vector_t position, int color) {
- vector_t* moves = malloc(14 * sizeof(vector_t));
- int moveCount = 0;
- for(int i = 0; i < 4; i++) {
- int h = i < 2 ? 1 : -1;
- int v = (i == 0 || i == 2) ? 1 : -1;
- vector_t checkPos = init_vector(position.mx, position.my);
- for(int d = 0; d < 7; d++) {
- checkPos.mx += h;
- checkPos.my += v;
- if(in_board(checkPos)) {
- if(is_empty(board, checkPos)) {
- moves[moveCount] = init_vector(checkPos.mx, checkPos.my);
- moveCount++;
- }
- else if(is_color(board, checkPos, !color)) {
- moves[moveCount] = init_vector(checkPos.mx, checkPos.my);
- moveCount++;
- break;
- }
- else {
- break;
- }
- }
- else {
- break;
- }
- }
- }
- return init_vectorp(moves, moveCount);
-}
-vectorp_t get_rook_moves(board_t board, vector_t position, int color) {
- vector_t* moves = malloc(14 * sizeof(vector_t));
- int moveCount = 0;
- for(int i = 0; i < 4; i++) {
- int h = (i == 0 || i == 2) ? 0 : i == 1 ? 1 : -1;
- int v = (i == 1 || i == 3) ? 0 : i == 2 ? 1 : -1;
- vector_t checkPos = init_vector(position.mx, position.my);
- for(int d = 0; d < 7; d++) {
- checkPos.mx += h;
- checkPos.my += v;
- if(in_board(checkPos)) {
- if(is_empty(board, checkPos)) {
- moves[moveCount] = init_vector(checkPos.mx, checkPos.my);
- moveCount++;
- }
- else if(is_color(board, checkPos, !color)) {
- moves[moveCount] = init_vector(checkPos.mx, checkPos.my);
- moveCount++;
- break;
- }
- else {
- break;
- }
- }
- else {
- break;
- }
- }
- }
- return init_vectorp(moves, moveCount);
-}
-vectorp_t get_queen_moves(board_t board, vector_t position, int color) {
- vector_t* moves = malloc(28 * sizeof(vector_t));
- int moveCount = 0;
- for(int i = 0; i < 8; i++) {
- int h;
- int v;
- //diagonal moves
- if(i < 4) {
- h = i < 2 ? 1 : -1;
- v = (i == 0 || i == 2) ? 1 : -1;
- }
- //straight moves
- else {
- h = (i == 4 || i == 6) ? 0 : i == 5 ? 1 : -1;
- v = (i == 5 || i == 7) ? 0 : i == 6 ? 1 : -1;
- }
- vector_t checkPos = init_vector(position.mx, position.my);
- for(int d = 0; d < 7; d++) {
- checkPos.mx += h;
- checkPos.my += v;
- if(in_board(checkPos)) {
- if(is_empty(board, checkPos)) {
- moves[moveCount] = init_vector(checkPos.mx, checkPos.my);
- moveCount++;
- }
- else if(is_color(board, checkPos, !color)) {
- moves[moveCount] = init_vector(checkPos.mx, checkPos.my);
- moveCount++;
- break;
- }
- else {
- break;
- }
- }
- else {
- break;
- }
- }
- }
- return init_vectorp(moves, moveCount);
-}
-//TODO: don't allow king to move next to opposing king
-vectorp_t get_king_moves(board_t board, vector_t position, int color) {
- //TODO: change size to 8
- vector_t* moves = malloc(20 * sizeof(vector_t));
- int moveCount = 0;
- for(int i = 0; i < 8; i++) {
- int h;
- int v;
- //diagonal moves
- if(i < 4) {
- h = i < 2 ? 1 : -1;
- v = (i == 0 || i == 2) ? 1 : -1;
- }
- //straight moves
- else {
- h = (i == 4 || i == 6) ? 0 : i == 5 ? 1 : -1;
- v = (i == 5 || i == 7) ? 0 : i == 6 ? 1 : -1;
- }
- vector_t move = init_vector(position.mx + h, position.my + v);
- if(in_board(move) && (is_empty(board, move) || is_color(board, move, !color))) {
- moves[moveCount] = move;
- moveCount++;
- }
- }
- //castling
- if(!is_in_check(board, color)) {
- //kingside castling
- if((color == 0 && board.whiteCanCastleKingside) || (color == 1 && board.blackCanCastleKingside)) {
- //check that the squares are free
- vector_t s1 = init_vector(5, color == 0 ? 7 : 0);
- vector_t s2 = init_vector(6, color == 0 ? 7 : 0);
- if(is_empty(board, s1) && is_empty(board, s2)) {
- //check that the squares are not threatened
- board_t tempBoard1 = make_move(clone_board(board), position, s1);
- board_t tempBoard2 = make_move(clone_board(board), position, s2);
- if(!is_in_check(tempBoard1, color) && !is_in_check(tempBoard2, color)) {
- //add the move
- moves[moveCount] = s2;
- moveCount++;
- }
- free(tempBoard1.pieces);
- free(tempBoard2.pieces);
- }
- }
- //queenside castling
- if((color == 0 && board.whiteCanCastleQueenside) || (color == 1 && board.blackCanCastleQueenside)) {
- //check that the squares are free
- vector_t s1 = init_vector(3, color == 0 ? 7 : 0);
- vector_t s2 = init_vector(2, color == 0 ? 7 : 0);
- if(is_empty(board, s1) && is_empty(board, s2)) {
- //check that the squares are not threatened
- board_t tempBoard1 = make_move(clone_board(board), position, s1);
- board_t tempBoard2 = make_move(clone_board(board), position, s2);
- if(!is_in_check(tempBoard1, color) && !is_in_check(tempBoard2, color)) {
- //add the move
- moves[moveCount] = s2;
- moveCount++;
- }
- free(tempBoard1.pieces);
- free(tempBoard2.pieces);
- }
- }
- }
- return init_vectorp(moves, moveCount);
-}
generated by cgit v1.3.1 (git 2.54.0) at 2026-10-22 05:28:58 +0000