warcpstimestamp.h

来自「ftpserver very good sample」· C头文件 代码 · 共 136 行

/** 
*/

#ifndef WAR_CPS_TIMESTAMP_H
#define WAR_CPS_TIMESTAMP_H

/* SYSTEM INCLUDES */


/* PROJECT INCLUDES */

#ifndef WAR_TIME_H
#   include "WarTime.h"
#endif

/* LOCAL INCLUDES */


/* FORWARD REFERENCES */



#ifdef __cplusplus
extern "C" 
{
#endif
/****************** BEGIN OLD STYLE C spesific ********/


/****************** END OLD STYLE C spesific **********/
#ifdef __cplusplus 
}
#endif

/****************** BEGIN C++ spesific ****************/

#ifdef __cplusplus

class WarCpsTimestamp 
{
public:
    // LIFECYCLE
    
    /**
    * Default constructor.
    */
    WarCpsTimestamp(war_flen_t stampWhere)
        : mWhere(stampWhere)
    {}
    
    /**
    * Copy constructor.
    *
    * @param from The value to copy to this object.
    */
    WarCpsTimestamp(const WarCpsTimestamp& from)
    {
        operator = (from);
    }
        
    // OPERATORS
    
    /**
    * Assignment operator.
    *
    * @param from THe value to assign to this object.
    *
    * @return A reference to this object.
    */
    WarCpsTimestamp& operator=(const WarCpsTimestamp& from)
    {
        mWhen = from.mWhen;
        mWhere = from.mWhere;

        return *this;
    }
    
    // OPERATIONS
    // CALLBACK
    // ACCESS
    // INQUIRY


    const WarTime& GetTime() const 
    {
        return mWhen;
    }

    const war_flen_t& GetBytes() const
    {
        return mWhere;
    }

    // Get cps. Other is the first sample.
    // this is the last.
    int GetCps(const WarCpsTimestamp& other)
    {
        double seconds = 
            (mWhen.mTime - other.mWhen.mTime) 
            / 1000.0;
        double bytes = mWhere - other.mWhere;
        if ((0 == bytes) || (0 == seconds))
            return 0;
        
        return (int)(bytes / seconds);
    }

    // Other is the first sample.
    // this is the last.
    WarTime GetNextCpsTime(const WarCpsTimestamp& other,
        int cpsLimit)
    {
        double cps = GetCps(other);
        double cps_limit = cpsLimit;

        double seconds = cps / cps_limit;
        return WarTime(mWhen.mTime + (war_time_t)((seconds * 1000.0)));
    }
    
protected:
private:
    WarTime mWhen;
    war_flen_t mWhere;
};

/* INLINE METHODS */

/* EXTERNAL REFERENCES */

#endif /* __cplusplus */

/****************** END C++ spesific ******************/

#endif  /* WAR_CPS_TIMESTAMP_H_ */