TD - Time

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time.h
-------------------------------------------------------------

#ifndef __TIME_TRAINS__
#define __TIME_TRAINS__

/**
 * Maximum length of seconds or minutes
 */
#define TIME_LENGTH 60

/**
 * Maximum length of hours in day
 */
#define TIME_LENGTH_DAY 24

/**
 * Contains information about current time
 */
typedef struct
{
    /**
     *  Number of hours
     */
    unsigned char Hours;

    /**
     * Number of minutes
     */
    unsigned char Minutes;

    /**
     * Number of seconds
     */
    unsigned char Seconds;
} GameTime;

/**
 * Current time
 */
static GameTime *time_current;

/**
 * Reset time back to zero
 * @param Item to reset
 */
void time_Reset(GameTime *time);

/**
 * Move time forward by 1 second
 * @param Item to update
 */
void time_UpdateSeconds(GameTime *time);

#endif

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time.c
-------------------------------------------------------

#include "../include/time.h"

/**
 * Reset time back to zero
 */
void time_Reset(GameTime *time)
{
    time->Hours = 0;
    time->Minutes = 0;
    time->Seconds = 0;
}

/**
 * Move time forward by 1 second
 */
void time_UpdateSeconds(GameTime *time)
{
    if (++time->Seconds >= TIME_LENGTH)
    {
        time->Seconds = 0;

        if (++time->Minutes >= TIME_LENGTH)
        {
            time->Minutes = 0;

            if (++time->Hours >= TIME_LENGTH_DAY)
            {
                time->Hours = 0;
            }
        }
    }
}