gecko-dev/xpcom/ds/nsTime.h

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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
*
* The contents of this file are subject to the Netscape Public License
* Version 1.0 (the "NPL"); you may not use this file except in
* compliance with the NPL. You may obtain a copy of the NPL at
* http://www.mozilla.org/NPL/
*
* Software distributed under the NPL is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
* for the specific language governing rights and limitations under the
* NPL.
*
* The Initial Developer of this code under the NPL is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1998 Netscape Communications Corporation. All Rights
* Reserved.
*/
#ifndef nsTime_h__
#define nsTime_h__
#include "prtime.h"
#include "nsInt64.h"
#include "nscore.h"
/**
* This class encapsulates full 64-bit time functionality and
* provides simple arithmetic and conversion operations.
*/
// If you ever decide that you need to add a non-inline method to this
// class, be sure to change the class declaration to "class NS_BASE
// nsTime".
class nsTime
{
private:
nsInt64 mValue;
public:
/**
* Construct the current time.
*/
nsTime(void) : mValue(PR_Now()) {
}
/**
* Construct the time from a string.
*/
nsTime(const char* dateStr, PRBool defaultToGMT) {
PRInt64 time;
PRStatus status = PR_ParseTimeString(dateStr, defaultToGMT, &time);
if (status == PR_SUCCESS)
mValue = time;
else
mValue = LL_ZERO;
}
/**
* Construct a time from a PRTime.
*/
nsTime(const PRTime aTime) : mValue(aTime) {
}
/**
* Construct a time from a 64-bit value.
*/
nsTime(const nsInt64& aTime) : mValue(aTime) {
}
/**
* Construct a time from another time.
*/
nsTime(const nsTime& aTime) : mValue(aTime.mValue) {
}
// ~nsTime(void) -- XXX destructor unnecessary
/**
* Assign one time to another.
*/
const nsTime& operator =(const nsTime& aTime) {
mValue = aTime.mValue;
return *this;
}
/**
* Convert a nsTime object to a PRTime
*/
operator PRTime(void) const {
return mValue;
}
/**
* Subtract a 64-bit interval from a time.
*/
nsTime& operator -=(const nsInt64& aInterval) {
mValue -= aInterval;
return *this;
}
/**
* Add a 64-bit interval to a time.
*/
nsTime& operator +=(const nsInt64& aInterval) {
mValue += aInterval;
return *this;
}
// Arithmetic operators
friend const nsTime operator +(const nsTime& aTime, const nsInt64& aInterval);
friend const nsTime operator -(const nsTime& aTime, const nsInt64& aInterval);
friend const nsInt64 operator -(const nsTime& aTime1, const nsTime& aTime2);
// Comparison operators
friend const PRBool operator ==(const nsTime& aTime1, const nsTime& aTime2);
friend const PRBool operator !=(const nsTime& aTime1, const nsTime& aTime2);
friend const PRBool operator <(const nsTime& aTime1, const nsTime& aTime2);
friend const PRBool operator <=(const nsTime& aTime1, const nsTime& aTime2);
friend const PRBool operator >(const nsTime& aTime1, const nsTime& aTime2);
friend const PRBool operator >=(const nsTime& aTime1, const nsTime& aTime2);
};
/**
* Binary addition to add a 64-bit interval to a time.
*/
inline const nsTime
operator +(const nsTime& aTime, const nsInt64& aInterval) {
return nsTime(aTime.mValue + aInterval);
}
/**
* Binary subtraction to subtract a 64-bit interval to a time.
*/
inline const nsTime
operator -(const nsTime& aTime, const nsInt64& aInterval) {
return nsTime(aTime.mValue - aInterval);
}
/**
* Binary subtraction to compute an interval from the difference of two times.
*/
inline const nsInt64
operator -(const nsTime& aTime1, const nsTime& aTime2) {
return aTime1.mValue - aTime2.mValue;
}
/**
* Determine if two times are equal
*/
inline const PRBool
operator ==(const nsTime& aTime1, const nsTime& aTime2) {
return aTime1.mValue == aTime2.mValue;
}
/**
* Determine if two times are different
*/
inline const PRBool
operator !=(const nsTime& aTime1, const nsTime& aTime2) {
return aTime1.mValue != aTime2.mValue;
}
/**
* Determine if one time is strictly less than another
*/
inline const PRBool
operator <(const nsTime& aTime1, const nsTime& aTime2) {
return aTime1.mValue < aTime2.mValue;
}
/**
* Determine if one time is less than or equal to another
*/
inline const PRBool
operator <=(const nsTime& aTime1, const nsTime& aTime2) {
return aTime1.mValue <= aTime2.mValue;
}
/**
* Determine if one time is strictly greater than another
*/
inline const PRBool
operator >(const nsTime& aTime1, const nsTime& aTime2) {
return aTime1.mValue > aTime2.mValue;
}
/**
* Determine if one time is greater than or equal to another
*/
inline const PRBool
operator >=(const nsTime& aTime1, const nsTime& aTime2) {
return aTime1.mValue >= aTime2.mValue;
}
#endif // nsTime_h__