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/*
* Copyright 2000-2014 JetBrains s.r.o.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.jetbrains.java.decompiler.util;
import org.jetbrains.java.decompiler.main.DecompilerContext;
import org.jetbrains.java.decompiler.main.TextBuffer;
import org.jetbrains.java.decompiler.main.extern.IFernflowerPreferences;
import java.io.*;
import java.nio.channels.FileChannel;
import java.util.Collection;
import java.util.HashSet;
import java.util.List;
import java.util.zip.ZipEntry;
import java.util.zip.ZipFile;
public class InterpreterUtil {
public static final boolean IS_WINDOWS = System.getProperty("os.name", "").startsWith("Windows");
public static final int[] EMPTY_INT_ARRAY = new int[0];
private static final int CHANNEL_WINDOW_SIZE = IS_WINDOWS ? 64 * 1024 * 1024 - (32 * 1024) : 64 * 1024 * 1024; // magic number for Windows
private static final int BUFFER_SIZE = 16 * 1024;
public static void copyFile(File in, File out) throws IOException {
FileInputStream inStream = new FileInputStream(in);
try {
FileOutputStream outStream = new FileOutputStream(out);
try {
FileChannel inChannel = inStream.getChannel();
FileChannel outChannel = outStream.getChannel();
long size = inChannel.size(), position = 0;
while (position < size) {
position += inChannel.transferTo(position, CHANNEL_WINDOW_SIZE, outChannel);
}
}
finally {
outStream.close();
}
}
finally {
inStream.close();
}
}
public static void copyStream(InputStream in, OutputStream out) throws IOException {
byte[] buffer = new byte[BUFFER_SIZE];
int len;
while ((len = in.read(buffer)) >= 0) {
out.write(buffer, 0, len);
}
}
public static byte[] getBytes(ZipFile archive, ZipEntry entry) throws IOException {
return readAndClose(archive.getInputStream(entry), (int)entry.getSize());
}
public static byte[] getBytes(File file) throws IOException {
return readAndClose(new FileInputStream(file), (int)file.length());
}
private static byte[] readAndClose(InputStream stream, int length) throws IOException {
try {
byte[] bytes = new byte[length];
int n = 0, off = 0;
while (n < length) {
int count = stream.read(bytes, off + n, length - n);
if (count < 0) {
throw new IOException("premature end of stream");
}
n += count;
}
return bytes;
}
finally {
stream.close();
}
}
public static String getIndentString(int length) {
if (length == 0) return "";
StringBuilder buf = new StringBuilder();
String indent = (String)DecompilerContext.getProperty(IFernflowerPreferences.INDENT_STRING);
while (length-- > 0) {
buf.append(indent);
}
return buf.toString();
}
public static boolean equalSets(Collection<?> c1, Collection<?> c2) {
if (c1 == null) {
return c2 == null;
}
else if (c2 == null) {
return false;
}
if (c1.size() != c2.size()) {
return false;
}
HashSet<Object> set = new HashSet<Object>(c1);
set.removeAll(c2);
return (set.size() == 0);
}
public static boolean equalObjects(Object first, Object second) {
return first == null ? second == null : first.equals(second);
}
public static boolean equalObjectArrays(Object[] first, Object[] second) {
if (first == null || second == null) {
return equalObjects(first, second);
}
else {
if (first.length != second.length) {
return false;
}
for (int i = 0; i < first.length; i++) {
if (!equalObjects(first[i], second[i])) {
return false;
}
}
}
return true;
}
public static boolean equalLists(List<?> first, List<?> second) {
if (first == null) {
return second == null;
}
else if (second == null) {
return false;
}
if (first.size() == second.size()) {
for (int i = 0; i < first.size(); i++) {
if (!equalObjects(first.get(i), second.get(i))) {
return false;
}
}
return true;
}
return false;
}
public static boolean isPrintableUnicode(char c) {
int t = Character.getType(c);
return t != Character.UNASSIGNED && t != Character.LINE_SEPARATOR && t != Character.PARAGRAPH_SEPARATOR &&
t != Character.CONTROL && t != Character.FORMAT && t != Character.PRIVATE_USE && t != Character.SURROGATE;
}
public static String charToUnicodeLiteral(int value) {
String sTemp = Integer.toHexString(value);
sTemp = ("0000" + sTemp).substring(sTemp.length());
return "\\u" + sTemp;
}
public static String makeUniqueKey(String name, String descriptor) {
return name + " " + descriptor;
}
}
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