TP 13 exo2: Implement the missing bits to do a full game.

[TD_C.git] / TP_13 / exo2 / lib / coordinates.c

/*
 * =====================================================================================
 *
 *       Filename:  coordinates.c
 *
 *    Description:  Data definition and functions to manipulate elements in the grid
 *
 *        Version:  1.0
 *        Created:  16/03/2017 19:05:02
 *       Revision:  none
 *       Compiler:  gcc
 *
 *         Author:  Jerome Benoit (fraggle), jerome.benoit@piment-noir.org
 *   Organization:  Piment Noir
 *
 * =====================================================================================
 */

#include "coordinates.h"

void init_coordinates(coordinates_t* coordinates_array) {
    for (unsigned i = 0; i < MAX_COORDINATES; i++) {
        coordinates_array[i] = set_coordinates(0, 0, 0);
    }
}

coordinates_t set_coordinates(int y, int x, unsigned type) {
    coordinates_t new_coordinates;

    new_coordinates.y = y;
    new_coordinates.x = x;
    new_coordinates.type = type;
    return new_coordinates;
}

/* the function do a lot of sanity checks before adding new board elements,
 * hence the loop. moving the checks in the main loop is also possible */
unsigned add_coordinates(coordinates_t new_coordinates, coordinates_t* coordinates_array, unsigned round) {
    /* valid coordinates are in the [1-3] range */
    if (new_coordinates.y < 1 || new_coordinates.y > 3 || new_coordinates.x < 1 || new_coordinates.x > 3) {
        return 3; /* error value for invalid coordinates */
    } else if (round == MAX_COORDINATES + 1) {
        return 1; /* error value for full array */
    }

    for (unsigned i = 0; i < MAX_COORDINATES; i++) {
        /* check if already entered */
        if (new_coordinates.y == (coordinates_array + i)->y && new_coordinates.x == (coordinates_array + i)->x) {
            return 2; /* error value for duplicates */
        } else if ((coordinates_array + i)->y == 0 && (coordinates_array + i)->x == 0) {
            coordinates_array[i] = new_coordinates;
            return 0; /* error value when everything if fine */
        }
    }
    return 4; /* error value for unknown error case - should never happen - */
}

bool chk_win_conditions(coordinates_t* coordinates_array) {
    for (unsigned i = 0; i < MAX_COORDINATES; i++) {

    }
    return false;
}