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69 lines
1.8 KiB
C++
69 lines
1.8 KiB
C++
// The contents of this file are subject to the Mozilla Public License
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// Version 1.1 (the "License"); you may not use this file except in
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// compliance with the License. You may obtain a copy of the License
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// at http://www.mozilla.org/MPL/
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//
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// Software distributed under the License is distributed on an "AS IS"
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// basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
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// the License for the specific language governing rights and
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// limitations under the License.
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//
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// The Initial Developer of the Original Code is James L. Nance.
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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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