home *** CD-ROM | disk | FTP | other *** search
- // This may look like C code, but it is really -*- C++ -*-
- /*
- Copyright (C) 1988 Free Software Foundation
- written by Dirk Grunwald (grunwald@cs.uiuc.edu)
-
- This file is part of the GNU C++ Library. This library is free
- software; you can redistribute it and/or modify it under the terms of
- the GNU Library General Public License as published by the Free
- Software Foundation; either version 2 of the License, or (at your
- option) any later version. This library is distributed in the hope
- that it will be useful, but WITHOUT ANY WARRANTY; without even the
- implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
- PURPOSE. See the GNU Library General Public License for more details.
- You should have received a copy of the GNU Library General Public
- License along with this library; if not, write to the Free Software
- Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
- */
- #ifdef __GNUG__
- #pragma implementation
- #endif
- #include <stream.h>
- #include <xsmplhis.h>
- #include <math.h>
-
- #ifndef HUGE_VAL
- #ifdef HUGE
- #define HUGE_VAL HUGE
- #else
- #include <float.h>
- #define HUGE_VAL DBL_MAX
- #endif
- #endif
-
- const int SampleHistogramMinimum = -2;
- const int SampleHistogramMaximum = -1;
-
- SampleHistogram::SampleHistogram(double low, double high, double width)
- {
- if (high < low) {
- double t = high;
- high = low;
- low = t;
- }
-
- if (width == -1) {
- width = (high - low) / 10;
- }
-
- howManyBuckets = int((high - low) / width) + 2;
- bucketCount = new int[howManyBuckets];
- bucketLimit = new double[howManyBuckets];
- double lim = low;
- for (int i = 0; i < howManyBuckets; i++) {
- bucketCount[i] = 0;
- bucketLimit[i] = lim;
- lim += width;
- }
- bucketLimit[howManyBuckets-1] = HUGE_VAL; /* from math.h */
- }
-
- SampleHistogram::~SampleHistogram()
- {
- if (howManyBuckets > 0) {
- delete bucketCount;
- delete bucketLimit;
- }
- }
-
- void
- SampleHistogram::operator+=(double value)
- {
- int i;
- for (i = 0; i < howManyBuckets; i++) {
- if (value < bucketLimit[i]) break;
- }
- bucketCount[i]++;
- this->SampleStatistic::operator+=(value);
- }
-
- int
- SampleHistogram::similarSamples(double d)
- {
- int i;
- for (i = 0; i < howManyBuckets; i++) {
- if (d < bucketLimit[i]) return(bucketCount[i]);
- }
- return(0);
- }
-
- void
- SampleHistogram::printBuckets(ostream& s)
- {
- for(int i = 0; i < howManyBuckets; i++) {
- if (bucketLimit[i] >= HUGE_VAL) {
- s << "< max : " << bucketCount[i] << "\n";
- } else {
- s << "< " << bucketLimit[i] << " : " << bucketCount[i] << "\n";
- }
- }
- }
-
- void
- SampleHistogram::reset()
- {
- this->SampleStatistic::reset();
- if (howManyBuckets > 0) {
- for (register int i = 0; i < howManyBuckets; i++) {
- bucketCount[i] = 0;
- }
- }
- }
-
-