Elaborato_SO/src/forza4.c

#include <stdio.h>
#include <forza4.h>

#include <structures.h>

void setCollums(int rows) {
	_ROWS = rows;
}

void setCollums(int collums) {
	_COLLUMS = collums;
}

int getIndex(int r, int c) {
	return r * _COLLUMS + c;
}

int checkLine(tile_t *board, int pos, int delta) {
	int count = 1, i;
	i = pos - delta;
	while (isValid(i) && board[pos] == board[i]) {
		count++;
		i -= delta;
	}
	i = pos + delta;
	while (isValid(i) && board[pos] == board[i]) {
		count++;
		i += delta;
	}

	return count >= 4;
} 

// checks board for a win
// returns player tile_t on win, otherwise 0
int checkWin(tile_t *board, int pos, int rows, int collums) {
	int result = checkLine(board, pos, ORIZONTAL); 
	if (result) {
		return board[pos];
	}

	int result = checkLine(board, pos, VERTICAL); 
	if (result) {
		return board[pos];
	}

	int result = checkLine(board, pos, DIAGONAL); 
	if (result) {
		return board[pos];
	}

	int result = checkLine(board, pos, DIAGONAL_INV); 
	if (result) {
		return board[pos];
	}

	return 0;
}

int checkWinAll(tile_t *board, int rows, int collums){
	for (int i=0; i<rows*collums; i++) {
		if (checkWin(board, i, rows, collums) != EMPTY) {
			return checkWin(board, i, rows, collums);
		}
	}

	return EMPTY;
}