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/*******************************************************************************
* Copyright (c) 2019 IBM Corporation and others.
*
* This program and the accompanying materials
* are made available under the terms of the Eclipse Public License 2.0
* which accompanies this distribution, and is available at
* https://www.eclipse.org/legal/epl-2.0/
*
* SPDX-License-Identifier: EPL-2.0
*
* This is an implementation of an early-draft specification developed under the Java
* Community Process (JCP) and is made available for testing and evaluation purposes
* only. The code is not compatible with any specification of the JCP.
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.jdt.core.internal.tools.unicode;
import java.text.DecimalFormat;
import java.util.ArrayList;
import java.util.Collections;
public class CodePointsBuilder {
public static Integer[] build(String[] codePointTable, Environment environment) {
ArrayList<Integer> values = new ArrayList<>();
for (String codePointTableEntry : codePointTable) {
if (codePointTableEntry.length() != 0) {
int indexOfDots = codePointTableEntry.indexOf(".."); //$NON-NLS-1$
if (indexOfDots == -1) {
// single value on the line
try {
values.add(Integer.parseInt(codePointTableEntry, 16));
} catch (NumberFormatException e) {
System.err.println("NumberFormatException processing : " + codePointTableEntry); //$NON-NLS-1$
return null;
}
} else {
// range of values
try {
int firstValue = Integer.parseInt(codePointTableEntry.substring(0, indexOfDots), 16);
int secondValue = Integer.parseInt(codePointTableEntry.substring(indexOfDots + 2), 16);
for (int i = firstValue; i <= secondValue; i++) {
values.add(i);
}
} catch (NumberFormatException e) {
System.err.println("NumberFormatException processing : " + codePointTableEntry); //$NON-NLS-1$
return null;
}
}
}
}
Collections.sort(values);
printDistribution(values, 0x10000);
return values.toArray(new Integer[values.size()]);
}
private static void printDistribution(ArrayList<Integer> array, int increment) {
int bound = increment;
int counter = 0;
int totalCounter = 0;
int length = array.size();
int max = array.get(length - 1).intValue();
int numberOfFiguresForRange = (int) (Math.log(max) / Math.log(10));
if ((max % increment) == 0) {
numberOfFiguresForRange = (int) (Math.log(max + 1) / Math.log(10));
}
int numberOfFiguresForCounter = (int) (Math.log(length) / Math.log(10));
if ((length % increment) == 0) {
numberOfFiguresForCounter = (int) (Math.log(length + 1) / Math.log(10));
}
for (int i = 0; i < length; i++) {
if (array.get(i).intValue() < bound) {
counter++;
} else {
i--;
totalCounter += counter;
printRange(counter, bound, increment, totalCounter, length, numberOfFiguresForRange,
numberOfFiguresForCounter);
counter = 0;
bound += increment;
}
}
totalCounter += counter;
printRange(counter, bound, increment, totalCounter, length, numberOfFiguresForRange, numberOfFiguresForCounter);
}
private static void printRange(int counter, int bound, int increment, int totalCounter, int length,
int numberOfFiguresForRange, int numberOfFiguresForCounters) {
if (counter != 0) {
StringBuffer buffer = new StringBuffer();
int low = bound - increment;
if (low != 0) {
low++;
}
DecimalFormat format = new DecimalFormat("###.##"); //$NON-NLS-1$
buffer.append(display(low, numberOfFiguresForRange, 16)).append(" - ") //$NON-NLS-1$
.append(display(bound, numberOfFiguresForRange, 16)).append(" : ") //$NON-NLS-1$
.append(display(counter, numberOfFiguresForCounters, 10)).append("\t") //$NON-NLS-1$
.append((low & 0x1F0000) >> 16).append("\t\t") //$NON-NLS-1$
.append(format.format(100.0 * ((double) totalCounter / length)));
System.out.println(String.valueOf(buffer));
}
}
private static String display(int value, int numberOfFiguresForRange, int radix) {
int numberOfFigures = value == 0 ? 1 : (int) (Math.log(value) / Math.log(10));
if ((value % 10) == 0) {
numberOfFigures = (int) (Math.log(value + 1) / Math.log(10));
}
StringBuffer buffer = new StringBuffer();
switch (radix) {
case 10:
while (numberOfFigures < numberOfFiguresForRange) {
buffer.append(" "); //$NON-NLS-1$
numberOfFigures++;
}
buffer.append(value);
break;
case 16:
buffer.append("0x" + Integer.toHexString(value)); //$NON-NLS-1$
}
return String.valueOf(buffer);
}
}
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