[C++] Date Class

[원본 - 2013년 이글루스]

목적 : javascript의 Date() 객체와 같은 녀석을 C++ 클래스로 만들어 보고 싶었음

이슈 : Month 값을 0 ~ 11 로 하지 않고 1 ~ 12 로 입력/출력 하도록 했음
       : Format 문자열의 경우, strftime() 의 그것을 사용함 msdn 이나 cpluslpus 참조

이하 Source Code:

CDate.h

#ifndef _DATE_H_
#define _DATE_H_

#include <time.h>

class CDate
{
private:
    time_t        m_nTime;
    struct tm    m_tm;
    
public:
    CDate();
    CDate( time_t time );
    CDate( int year, int month, int day, int hour, int min, int sec );
    CDate( const CDate& date );
    ~CDate();
    
public:
    // Format String
    int format( char* buf, int bufSize, const char* fmtString );
    
public:
    int getMEndDay();   // Returns the end of day of the month (from 28-31)
    int getMDay();      // Returns the day of the month (from 1-31)
    int getWDay();      // Returns the day of the week (from 0-6)
    int getFullYear();  // Returns the year (four digits)
    int getHours();     // Returns the hour (from 0-23)
    int getMinutes();   // Returns the minutes (from 0-59)
    int getMonth();     // Returns the month (from 1-12)
    int getSeconds();   // Returns the seconds (from 0-59)
    time_t getTime();   // Returns the number of seconds since midnight Jan 1, 1970
    
    void setDate( int year, int month, int day );
    void setDate( int year, int month, int day, int hour, int min, int sec );
    void setDay( int day );       // Sets the day of the month of a date object
    void setFullYear( int year ); // Sets the year (four digits) of a date object
    void setHours( int hour );    // Sets the hour of a date object
    void setMinutes( int min );   // Set the minutes of a date object
    void setMonth( int month );   // Sets the month of a date object
    void setSeconds( int sec );   // Sets the seconds of a date object
    void setTime( time_t time );  // Sets a date and time by adding or subtracting a specified number of milliseconds to/from midnight January 1, 1970
};

#endif

CDate.cpp

#include "CDate.h"
#include <string.h>

inline static struct tm* _localtime( time_t* time, struct tm* _tm )
{
#ifdef _WIN32
    localtime_s( _tm, time );
#else
    localtime_r( time, _tm );
#endif
    return _tm;
}

CDate::CDate()
{
    m_nTime = time(NULL);
    _localtime( &m_nTime, &m_tm );
}

CDate::CDate( time_t time )
{
    m_nTime = time;
    _localtime( &m_nTime, &m_tm );
}

CDate::CDate( int year, int month, int day, int hour, int min, int sec )
{
    struct tm tmp_tm;
    
    memset( &tmp_tm, 0, sizeof( tmp_tm ) );
    tmp_tm.tm_year = year - 1900;
    tmp_tm.tm_mon = month - 1;
    tmp_tm.tm_mday = day;
    tmp_tm.tm_hour = hour;
    tmp_tm.tm_min = min;
    tmp_tm.tm_sec = sec;
    
    setTime( mktime( &tmp_tm ) );
}

CDate::CDate( const CDate& date )
{
    m_nTime = date.m_nTime;
    _localtime( &m_nTime, &m_tm );
}

CDate::~CDate()
{
}

int CDate::format( char* buf, int bufSize, const char* fmtString )
{
    return strftime( buf, bufSize, fmtString, &m_tm );
}

int CDate::getMEndDay()
{
    static unsigned char month_days[] = {31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
    
    if( m_tm.tm_mon == 1 ) {
        int year = m_tm.tm_year + 1900;
        if( year%4==0 && ( year%100!=0 || year%400==0 ) ) {
            return 29;
        }
    }
    
    return (int)month_days[ m_tm.tm_mon ];
}

int CDate::getMDay()
{
    return m_tm.tm_mday;
}

int CDate::getWDay()
{
    return m_tm.tm_wday;
}

int CDate::getFullYear()
{
    return m_tm.tm_year + 1900;
}

int CDate::getHours()
{
    return m_tm.tm_hour;
}

int CDate::getMinutes()
{
    return m_tm.tm_min;
}

int CDate::getMonth()
{
    return m_tm.tm_mon + 1;
}

int CDate::getSeconds()
{
    return m_tm.tm_sec;
}

time_t CDate::getTime()
{
    return m_nTime;
}

void CDate::setDate( int year, int month, int day )
{
    m_tm.tm_year = year - 1900;
    m_tm.tm_mon = month - 1;
    m_tm.tm_mday = day;
    setTime( mktime( &m_tm ) );
}

void CDate::setDate( int year, int month, int day, int hour, int min, int sec )
{
    m_tm.tm_year = year - 1900;
    m_tm.tm_mon = month - 1;
    m_tm.tm_mday = day;
    m_tm.tm_hour = hour;
    m_tm.tm_min = min;
    m_tm.tm_sec = sec;
    setTime( mktime( &m_tm ) );
}

void CDate::setDay( int day )
{
    m_tm.tm_mday = day;
    setTime( mktime( &m_tm ) );
}

void CDate::setFullYear( int year )
{
    m_tm.tm_year = year - 1900;
    setTime( mktime( &m_tm ) );
}

void CDate::setHours( int hour )
{
    m_tm.tm_hour = hour;
    setTime( mktime( &m_tm ) );
}

void CDate::setMinutes( int min )
{
    m_tm.tm_min = min;
    setTime( mktime( &m_tm ) );
}

void CDate::setMonth( int month )
{
    m_tm.tm_mon = month - 1;
    setTime( mktime( &m_tm ) );
}

void CDate::setSeconds( int sec )
{
    m_tm.tm_sec = sec;
    setTime( mktime( &m_tm ) );
}

void CDate::setTime( time_t time )
{
    m_nTime = time;
    _localtime( &m_nTime, &m_tm );
}