structs.h

#ifndef SNAKE_STRUCTS
#define SNAKE_STRUCTS

/**
 * Enum, storing possible moving directions
 */
typedef enum Direction{
    NONE = -1,
    UP = 0,
    RIGHT = 1,
    DOWN = 2,
    LEFT = 3,
}Direction;

/**
 * 2 dimensional integer vector
 * or position
 */
typedef struct Vec2i{
    int x;
    int y;
}Pos;

/**
 * Storing snake linked list.
 * The head can count as a sentry (but it is storing data but cannot be removed...)
 */
typedef struct snakeChain
{
    /**
     * snake part distance from head. Feature wasn't added
     */
    int num;
    /**
     * Snake part's pos
     */
    struct Vec2i pos;
    /**
     * direction. Feature wasn't added
     */
    Direction dir;
    /**
     * Why do I have to document this. It is obvious
     */
    struct snakeChain *next;

}snakeChain;

/**
 * Storing 4 bytes for 1 utf-8 encoded character
 * *utf-8 does not always 4 bytes long, can be shorter...
 * 
 * If not using utf-8 encoding, the 1st byte will be used
 * 
 * in utf-8, the first bit can tell is it longer?
 * this is why I used union
 */
typedef union unichar{
    int isUnicone : 1;
    struct{
        char c[4];
    }bytes;

}unichar;

/**
 * 1 1 by 2 chunk. Can store a boolean, is it a food chunk, or it's just a wall or air...
 * stores 2 unichar
 */
typedef struct chunk