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#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include "vector.h"
#include "chesshelpers.h"
board_t init_board(int** pieces) {
board_t board;
board.pieces = pieces;
board.blackKingHasMoved = 0;
board.whiteKingHasMoved = 0;
board.lastPawnMove = 0;
return board;
}
//function applies side effects to board values like king move state
board_t make_move(board_t board, vector_t origin, vector_t end) {
int piece = board.pieces[origin.mx][origin.my];
board.pieces[origin.mx][origin.my] = 0;
board.pieces[end.mx][end.my] = piece;
}
int in_board(vector_t position) {
return position.mx < 8 && position.mx >= 0 && position.my < 8 && position.my >= 0;
}
int is_empty(int** board, vector_t position) {
return board[position.mx][position.my] == 0;
}
int is_color(int** board, vector_t position, int color) {
if(color == 0) {
return board[position.mx][position.my] >= 1 && board[position.mx][position.my] <= 6;
}
else {
return board[position.mx][position.my] >= 7;
}
}
//converts board coordinates into algebraic notation
char* get_readable_coords(vector_t position) {
char* output = malloc(3 * sizeof(char));
output[0] = 'a' + position.mx;
output[1] = '8' - position.my;
output[2] = '\0';
return output;
}
//gets the proper algebraic notation for the move
char* get_move_name(int** board, vector_t origin, vector_t end) {
int piece = board[origin.mx][origin.my];
if(piece > 6) {
piece -= 6;
}
if(piece != 1) {
char cPiece = piece == pawn ? 'P' : piece == knight ? 'N' : piece == bishop ? 'B' : piece == rook ? 'R' : piece == queen ? 'Q' : 'K';
int isCapture = board[end.mx][end.my] != 0;
char* output = calloc(isCapture ? 5 : 4, sizeof(char));
output[0] = cPiece;
if(isCapture) {
output[1] = 'x';
}
char* rEnd = get_readable_coords(end);
strcat(output, rEnd);
free(rEnd);
output[isCapture ? 4 : 3] = '\0';
return output;
}
else {
int isCapture = board[end.mx][end.my] != 0;
char* output = calloc(isCapture ? 5 : 3, sizeof(char));
if(isCapture) {
output[0] = 'a' + origin.mx;
output[1] = 'x';
}
char* rEnd = get_readable_coords(end);
strcat(output, rEnd);
free(rEnd);
output[isCapture ? 4 : 2] = '\0';
return output;
}
}
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