//.h

typedef struct      s_coord
{
    int             x;
    int             y;
    char            c;
    struct s_coord  *next;
}                   t_coord;

//.c

void        push_coord(t_coord **coords, int x, int y, char c)
{
    t_coord *ret;

    if (coords && *coords)
    {
        ret = *coords;
        while (ret->next)
                ret = ret->next;
        ret->next = create_coord(x, y, c);
    }
    else
        *coords = create_coord(x, y, c);
}