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74 lines
1.7 KiB
C++
74 lines
1.7 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/*
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* The contents of this file are subject to the Mozilla Public License
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* Version 1.1 (the "MPL"); you may not use this file except in
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* compliance with the MPL. You may obtain a copy of the MPL at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the MPL is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the MPL
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* for the specific language governing rights and limitations under the
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* MPL.
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*
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* The Initial Developer of this code under the MPL is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1999 Netscape Communications Corporation. All Rights
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* Reserved.
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*
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* Original Author:
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* Chris Waterson <waterson@netscape.com>
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*/
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/*
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An object that collects distribution data
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*/
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#ifndef nsStatistics_h__
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#define nsStatistics_h__
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#include <stdio.h>
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#include "nscore.h"
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#include "nsCom.h"
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#include "plhash.h"
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/**
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* An object that collects distribution data.
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*/
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class NS_COM nsStatistics
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{
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public:
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nsStatistics(const char* aTopic);
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~nsStatistics();
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/**
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* Add a value to the distribution
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*/
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void Record(PRInt32 aValue);
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/**
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* Clear the information collected so far
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*/
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void Clear();
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/**
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* Print the mean, standard deviation, and distribution
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* of values reported so far
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*/
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void Print(FILE* aStream);
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protected:
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const char* mTopic;
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PLHashTable* mDistribution;
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PRInt32 mCount;
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PRInt32 mMinimum;
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PRInt32 mMaximum;
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double mSum;
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double mSumOfSquares;
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static PLHashNumber PR_CALLBACK HashPRInt32(const void* aKey);
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};
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#endif
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