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92 lines
2.9 KiB
C++
92 lines
2.9 KiB
C++
/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is mozilla.org code.
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*
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* The Initial Developer of the Original Code is Netscape Communications Corp.
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* Portions created by the Initial Developer are Copyright (C) 1998
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#include "intcnt.h"
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IntCount::IntCount() : numInts(0), iPair(0) { }
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IntCount::~IntCount() { delete [] iPair;}
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int IntCount::getSize() {return numInts;}
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int IntCount::getCount(int pos) {return iPair[pos].cnt;}
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int IntCount::getIndex(int pos) {return iPair[pos].idx;}
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int IntCount::countAdd(int index, int increment)
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{
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if(numInts) {
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// Do a binary search to find the element
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int divPoint = 0;
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if(index>iPair[numInts-1].idx) {
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divPoint = numInts;
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} else if(index<iPair[0].idx) {
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divPoint = 0;
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} else {
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int low=0, high=numInts-1;
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int mid = (low+high)/2;
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while(1) {
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mid = (low+high)/2;
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if(index<iPair[mid].idx) {
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high = mid;
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} else if(index>iPair[mid].idx) {
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if(mid<numInts-1 && index<iPair[mid+1].idx) {
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divPoint = mid+1;
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break;
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} else {
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low = mid+1;
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}
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} else if(index==iPair[mid].idx) {
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return iPair[mid].cnt += increment;
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}
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}
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}
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int i;
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IntPair *tpair = new IntPair[numInts+1];
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for(i=0; i<divPoint; i++) tpair[i] = iPair[i];
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for(i=divPoint; i<numInts; i++) tpair[i+1] = iPair[i];
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++numInts;
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delete [] iPair;
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iPair = tpair;
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iPair[divPoint].idx = index;
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iPair[divPoint].cnt = increment;
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return increment;
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} else {
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iPair = new IntPair[1];
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numInts = 1;
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iPair[0].idx = index;
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return iPair[0].cnt = increment;
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}
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}
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