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Apache Commons Compress defines an API for working with
compression and archive formats. These include bzip2, gzip, pack200,
LZMA, XZ, Snappy, traditional Unix Compress, DEFLATE, DEFLATE64, LZ4,
Brotli, Zstandard and ar, cpio, jar, tar, zip, dump, 7z, arj.
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.apache.commons.compress.archivers.sevenz;
import static java.nio.charset.StandardCharsets.UTF_16LE;
import java.io.BufferedInputStream;
import java.io.ByteArrayOutputStream;
import java.io.Closeable;
import java.io.DataOutput;
import java.io.DataOutputStream;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.nio.ByteBuffer;
import java.nio.ByteOrder;
import java.nio.channels.SeekableByteChannel;
import java.nio.file.Files;
import java.nio.file.LinkOption;
import java.nio.file.OpenOption;
import java.nio.file.Path;
import java.nio.file.StandardOpenOption;
import java.nio.file.attribute.BasicFileAttributes;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.BitSet;
import java.util.Collections;
import java.util.Date;
import java.util.EnumSet;
import java.util.HashMap;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;
import java.util.stream.Stream;
import java.util.stream.StreamSupport;
import java.util.zip.CRC32;
import org.apache.commons.compress.archivers.ArchiveEntry;
import org.apache.commons.io.file.attribute.FileTimes;
import org.apache.commons.io.output.CountingOutputStream;
/**
* Writes a 7z file.
*
* @since 1.6
*/
public class SevenZOutputFile implements Closeable {
private final class OutputStreamWrapper extends OutputStream {
private static final int BUF_SIZE = 8192;
private final ByteBuffer buffer = ByteBuffer.allocate(BUF_SIZE);
@Override
public void close() throws IOException {
// the file will be closed by the containing class's close method
}
@Override
public void flush() throws IOException {
// no reason to flush the channel
}
@Override
public void write(final byte[] b) throws IOException {
OutputStreamWrapper.this.write(b, 0, b.length);
}
@Override
public void write(final byte[] b, final int off, final int len) throws IOException {
if (len > BUF_SIZE) {
channel.write(ByteBuffer.wrap(b, off, len));
} else {
buffer.clear();
buffer.put(b, off, len).flip();
channel.write(buffer);
}
compressedCrc32.update(b, off, len);
fileBytesWritten += len;
}
@Override
public void write(final int b) throws IOException {
buffer.clear();
buffer.put((byte) b).flip();
channel.write(buffer);
compressedCrc32.update(b);
fileBytesWritten++;
}
}
private static Iterable reverse(final Iterable i) {
final LinkedList l = new LinkedList<>();
for (final T t : i) {
l.addFirst(t);
}
return l;
}
private final SeekableByteChannel channel;
private final List files = new ArrayList<>();
private int numNonEmptyStreams;
private final CRC32 crc32 = new CRC32();
private final CRC32 compressedCrc32 = new CRC32();
private long fileBytesWritten;
private boolean finished;
private CountingOutputStream currentOutputStream;
private CountingOutputStream[] additionalCountingStreams;
private Iterable contentMethods = Collections.singletonList(new SevenZMethodConfiguration(SevenZMethod.LZMA2));
private final Map additionalSizes = new HashMap<>();
private AES256Options aes256Options;
/**
* Opens file to write a 7z archive to.
*
* @param fileName the file to write to
* @throws IOException if opening the file fails
*/
public SevenZOutputFile(final File fileName) throws IOException {
this(fileName, null);
}
/**
* Opens file to write a 7z archive to.
*
* @param fileName the file to write to
* @param password optional password if the archive has to be encrypted
* @throws IOException if opening the file fails
* @since 1.23
*/
public SevenZOutputFile(final File fileName, final char[] password) throws IOException {
this(Files.newByteChannel(fileName.toPath(), EnumSet.of(StandardOpenOption.CREATE, StandardOpenOption.WRITE, StandardOpenOption.TRUNCATE_EXISTING)),
password);
}
/**
* Prepares channel to write a 7z archive to.
*
*
* {@link org.apache.commons.compress.utils.SeekableInMemoryByteChannel} allows you to write to an in-memory archive.
*
*
* @param channel the channel to write to
* @throws IOException if the channel cannot be positioned properly
* @since 1.13
*/
public SevenZOutputFile(final SeekableByteChannel channel) throws IOException {
this(channel, null);
}
/**
* Prepares channel to write a 7z archive to.
*
*
* {@link org.apache.commons.compress.utils.SeekableInMemoryByteChannel} allows you to write to an in-memory archive.
*
*
* @param channel the channel to write to
* @param password optional password if the archive has to be encrypted
* @throws IOException if the channel cannot be positioned properly
* @since 1.23
*/
public SevenZOutputFile(final SeekableByteChannel channel, final char[] password) throws IOException {
this.channel = channel;
channel.position(SevenZFile.SIGNATURE_HEADER_SIZE);
if (password != null) {
this.aes256Options = new AES256Options(password);
}
}
/**
* Closes the archive, calling {@link #finish} if necessary.
*
* @throws IOException on error
*/
@Override
public void close() throws IOException {
try {
if (!finished) {
finish();
}
} finally {
channel.close();
}
}
/**
* Closes the archive entry.
*
* @throws IOException on error
*/
public void closeArchiveEntry() throws IOException {
if (currentOutputStream != null) {
currentOutputStream.flush();
currentOutputStream.close();
}
final SevenZArchiveEntry entry = files.get(files.size() - 1);
if (fileBytesWritten > 0) { // this implies currentOutputStream != null
entry.setHasStream(true);
++numNonEmptyStreams;
entry.setSize(currentOutputStream.getByteCount()); // NOSONAR
entry.setCompressedSize(fileBytesWritten);
entry.setCrcValue(crc32.getValue());
entry.setCompressedCrcValue(compressedCrc32.getValue());
entry.setHasCrc(true);
if (additionalCountingStreams != null) {
final long[] sizes = new long[additionalCountingStreams.length];
Arrays.setAll(sizes, i -> additionalCountingStreams[i].getByteCount());
additionalSizes.put(entry, sizes);
}
} else {
entry.setHasStream(false);
entry.setSize(0);
entry.setCompressedSize(0);
entry.setHasCrc(false);
}
currentOutputStream = null;
additionalCountingStreams = null;
crc32.reset();
compressedCrc32.reset();
fileBytesWritten = 0;
}
/**
* Creates an archive entry using the inputFile and entryName provided.
*
* @param inputFile file to create an entry from
* @param entryName the name to use
* @return the ArchiveEntry set up with details from the file
*/
public SevenZArchiveEntry createArchiveEntry(final File inputFile, final String entryName) {
final SevenZArchiveEntry entry = new SevenZArchiveEntry();
entry.setDirectory(inputFile.isDirectory());
entry.setName(entryName);
try {
fillDates(inputFile.toPath(), entry);
} catch (final IOException e) { // NOSONAR
entry.setLastModifiedDate(new Date(inputFile.lastModified()));
}
return entry;
}
/**
* Creates an archive entry using the inputPath and entryName provided.
*
* @param inputPath path to create an entry from
* @param entryName the name to use
* @param options options indicating how symbolic links are handled.
* @return the ArchiveEntry set up with details from the file
*
* @throws IOException on error
* @since 1.21
*/
public SevenZArchiveEntry createArchiveEntry(final Path inputPath, final String entryName, final LinkOption... options) throws IOException {
final SevenZArchiveEntry entry = new SevenZArchiveEntry();
entry.setDirectory(Files.isDirectory(inputPath, options));
entry.setName(entryName);
fillDates(inputPath, entry, options);
return entry;
}
private void fillDates(final Path inputPath, final SevenZArchiveEntry entry, final LinkOption... options) throws IOException {
final BasicFileAttributes attributes = Files.readAttributes(inputPath, BasicFileAttributes.class, options);
entry.setLastModifiedTime(attributes.lastModifiedTime());
entry.setCreationTime(attributes.creationTime());
entry.setAccessTime(attributes.lastAccessTime());
}
/**
* Finishes the addition of entries to this archive, without closing it.
*
* @throws IOException if archive is already closed.
*/
public void finish() throws IOException {
if (finished) {
throw new IOException("This archive has already been finished");
}
finished = true;
final long headerPosition = channel.position();
final ByteArrayOutputStream headerBaos = new ByteArrayOutputStream();
final DataOutputStream header = new DataOutputStream(headerBaos);
writeHeader(header);
header.flush();
final byte[] headerBytes = headerBaos.toByteArray();
channel.write(ByteBuffer.wrap(headerBytes));
final CRC32 crc32 = new CRC32();
crc32.update(headerBytes);
final ByteBuffer bb = ByteBuffer.allocate(SevenZFile.sevenZSignature.length + 2 /* version */
+ 4 /* start header CRC */
+ 8 /* next header position */
+ 8 /* next header length */
+ 4 /* next header CRC */).order(ByteOrder.LITTLE_ENDIAN);
// signature header
channel.position(0);
bb.put(SevenZFile.sevenZSignature);
// version
bb.put((byte) 0).put((byte) 2);
// placeholder for start header CRC
bb.putInt(0);
// start header
bb.putLong(headerPosition - SevenZFile.SIGNATURE_HEADER_SIZE).putLong(0xffffFFFFL & headerBytes.length).putInt((int) crc32.getValue());
crc32.reset();
crc32.update(bb.array(), SevenZFile.sevenZSignature.length + 6, 20);
bb.putInt(SevenZFile.sevenZSignature.length + 2, (int) crc32.getValue());
bb.flip();
channel.write(bb);
}
private Iterable getContentMethods(final SevenZArchiveEntry entry) {
final Iterable ms = entry.getContentMethods();
Iterable iter = ms == null ? contentMethods : ms;
if (aes256Options != null) {
// prepend encryption
iter = Stream
.concat(Stream.of(new SevenZMethodConfiguration(SevenZMethod.AES256SHA256, aes256Options)), StreamSupport.stream(iter.spliterator(), false))
.collect(Collectors.toList());
}
return iter;
}
/*
* Creation of output stream is deferred until data is actually written as some codecs might write header information even for empty streams and directories
* otherwise.
*/
private OutputStream getCurrentOutputStream() throws IOException {
if (currentOutputStream == null) {
currentOutputStream = setupFileOutputStream();
}
return currentOutputStream;
}
/**
* Records an archive entry to add.
*
* The caller must then write the content to the archive and call {@link #closeArchiveEntry()} to complete the process.
*
* @param archiveEntry describes the entry
* @deprecated Use {@link #putArchiveEntry(SevenZArchiveEntry)}.
*/
@Deprecated
public void putArchiveEntry(final ArchiveEntry archiveEntry) {
putArchiveEntry((SevenZArchiveEntry) archiveEntry);
}
/**
* Records an archive entry to add.
*
* The caller must then write the content to the archive and call {@link #closeArchiveEntry()} to complete the process.
*
* @param archiveEntry describes the entry
* @since 1.25.0
*/
public void putArchiveEntry(final SevenZArchiveEntry archiveEntry) {
files.add(archiveEntry);
}
/**
* Sets the default compression method to use for entry contents - the default is LZMA2.
*
*
* Currently only {@link SevenZMethod#COPY}, {@link SevenZMethod#LZMA2}, {@link SevenZMethod#BZIP2} and {@link SevenZMethod#DEFLATE} are supported.
*
*
*
* This is a short form for passing a single-element iterable to {@link #setContentMethods}.
*
*
* @param method the default compression method
*/
public void setContentCompression(final SevenZMethod method) {
setContentMethods(Collections.singletonList(new SevenZMethodConfiguration(method)));
}
/**
* Sets the default (compression) methods to use for entry contents - the default is LZMA2.
*
*
* Currently only {@link SevenZMethod#COPY}, {@link SevenZMethod#LZMA2}, {@link SevenZMethod#BZIP2} and {@link SevenZMethod#DEFLATE} are supported.
*
*
*
* The methods will be consulted in iteration order to create the final output.
*
*
* @since 1.8
* @param methods the default (compression) methods
*/
public void setContentMethods(final Iterable methods) {
this.contentMethods = reverse(methods);
}
private CountingOutputStream setupFileOutputStream() throws IOException {
if (files.isEmpty()) {
throw new IllegalStateException("No current 7z entry");
}
// doesn't need to be closed, just wraps the instance field channel
OutputStream out = new OutputStreamWrapper(); // NOSONAR
final ArrayList moreStreams = new ArrayList<>();
boolean first = true;
for (final SevenZMethodConfiguration m : getContentMethods(files.get(files.size() - 1))) {
if (!first) {
final CountingOutputStream cos = new CountingOutputStream(out);
moreStreams.add(cos);
out = cos;
}
out = Coders.addEncoder(out, m.getMethod(), m.getOptions());
first = false;
}
if (!moreStreams.isEmpty()) {
additionalCountingStreams = moreStreams.toArray(new CountingOutputStream[0]);
}
return new CountingOutputStream(out) {
@Override
public void write(final byte[] b) throws IOException {
super.write(b);
crc32.update(b);
}
@Override
public void write(final byte[] b, final int off, final int len) throws IOException {
super.write(b, off, len);
crc32.update(b, off, len);
}
@Override
public void write(final int b) throws IOException {
super.write(b);
crc32.update(b);
}
};
}
/**
* Writes a byte array to the current archive entry.
*
* @param b The byte array to be written.
* @throws IOException on error
*/
public void write(final byte[] b) throws IOException {
write(b, 0, b.length);
}
/**
* Writes part of a byte array to the current archive entry.
*
* @param b The byte array to be written.
* @param off offset into the array to start writing from
* @param len number of bytes to write
* @throws IOException on error
*/
public void write(final byte[] b, final int off, final int len) throws IOException {
if (len > 0) {
getCurrentOutputStream().write(b, off, len);
}
}
/**
* Writes all of the given input stream to the current archive entry.
*
* @param inputStream the data source.
* @throws IOException if an I/O error occurs.
* @since 1.21
*/
public void write(final InputStream inputStream) throws IOException {
final byte[] buffer = new byte[8024];
int n = 0;
while (-1 != (n = inputStream.read(buffer))) {
write(buffer, 0, n);
}
}
/**
* Writes a byte to the current archive entry.
*
* @param b The byte to be written.
* @throws IOException on error
*/
public void write(final int b) throws IOException {
getCurrentOutputStream().write(b);
}
/**
* Writes all of the given input stream to the current archive entry.
*
* @param path the data source.
* @param options options specifying how the file is opened.
* @throws IOException if an I/O error occurs.
* @since 1.21
*/
public void write(final Path path, final OpenOption... options) throws IOException {
try (InputStream in = new BufferedInputStream(Files.newInputStream(path, options))) {
write(in);
}
}
private void writeBits(final DataOutput header, final BitSet bits, final int length) throws IOException {
int cache = 0;
int shift = 7;
for (int i = 0; i < length; i++) {
cache |= (bits.get(i) ? 1 : 0) << shift;
if (--shift < 0) {
header.write(cache);
shift = 7;
cache = 0;
}
}
if (shift != 7) {
header.write(cache);
}
}
private void writeFileAntiItems(final DataOutput header) throws IOException {
boolean hasAntiItems = false;
final BitSet antiItems = new BitSet(0);
int antiItemCounter = 0;
for (final SevenZArchiveEntry file1 : files) {
if (!file1.hasStream()) {
final boolean isAnti = file1.isAntiItem();
antiItems.set(antiItemCounter++, isAnti);
hasAntiItems |= isAnti;
}
}
if (hasAntiItems) {
header.write(NID.kAnti);
final ByteArrayOutputStream baos = new ByteArrayOutputStream();
final DataOutputStream out = new DataOutputStream(baos);
writeBits(out, antiItems, antiItemCounter);
out.flush();
final byte[] contents = baos.toByteArray();
writeUint64(header, contents.length);
header.write(contents);
}
}
private void writeFileATimes(final DataOutput header) throws IOException {
int numAccessDates = 0;
for (final SevenZArchiveEntry entry : files) {
if (entry.getHasAccessDate()) {
++numAccessDates;
}
}
if (numAccessDates > 0) {
header.write(NID.kATime);
final ByteArrayOutputStream baos = new ByteArrayOutputStream();
final DataOutputStream out = new DataOutputStream(baos);
if (numAccessDates != files.size()) {
out.write(0);
final BitSet aTimes = new BitSet(files.size());
for (int i = 0; i < files.size(); i++) {
aTimes.set(i, files.get(i).getHasAccessDate());
}
writeBits(out, aTimes, files.size());
} else {
out.write(1); // "allAreDefined" == true
}
out.write(0);
for (final SevenZArchiveEntry entry : files) {
if (entry.getHasAccessDate()) {
final long ntfsTime = FileTimes.toNtfsTime(entry.getAccessTime());
out.writeLong(Long.reverseBytes(ntfsTime));
}
}
out.flush();
final byte[] contents = baos.toByteArray();
writeUint64(header, contents.length);
header.write(contents);
}
}
private void writeFileCTimes(final DataOutput header) throws IOException {
int numCreationDates = 0;
for (final SevenZArchiveEntry entry : files) {
if (entry.getHasCreationDate()) {
++numCreationDates;
}
}
if (numCreationDates > 0) {
header.write(NID.kCTime);
final ByteArrayOutputStream baos = new ByteArrayOutputStream();
final DataOutputStream out = new DataOutputStream(baos);
if (numCreationDates != files.size()) {
out.write(0);
final BitSet cTimes = new BitSet(files.size());
for (int i = 0; i < files.size(); i++) {
cTimes.set(i, files.get(i).getHasCreationDate());
}
writeBits(out, cTimes, files.size());
} else {
out.write(1); // "allAreDefined" == true
}
out.write(0);
for (final SevenZArchiveEntry entry : files) {
if (entry.getHasCreationDate()) {
final long ntfsTime = FileTimes.toNtfsTime(entry.getCreationTime());
out.writeLong(Long.reverseBytes(ntfsTime));
}
}
out.flush();
final byte[] contents = baos.toByteArray();
writeUint64(header, contents.length);
header.write(contents);
}
}
private void writeFileEmptyFiles(final DataOutput header) throws IOException {
boolean hasEmptyFiles = false;
int emptyStreamCounter = 0;
final BitSet emptyFiles = new BitSet(0);
for (final SevenZArchiveEntry file1 : files) {
if (!file1.hasStream()) {
final boolean isDir = file1.isDirectory();
emptyFiles.set(emptyStreamCounter++, !isDir);
hasEmptyFiles |= !isDir;
}
}
if (hasEmptyFiles) {
header.write(NID.kEmptyFile);
final ByteArrayOutputStream baos = new ByteArrayOutputStream();
final DataOutputStream out = new DataOutputStream(baos);
writeBits(out, emptyFiles, emptyStreamCounter);
out.flush();
final byte[] contents = baos.toByteArray();
writeUint64(header, contents.length);
header.write(contents);
}
}
private void writeFileEmptyStreams(final DataOutput header) throws IOException {
final boolean hasEmptyStreams = files.stream().anyMatch(entry -> !entry.hasStream());
if (hasEmptyStreams) {
header.write(NID.kEmptyStream);
final BitSet emptyStreams = new BitSet(files.size());
for (int i = 0; i < files.size(); i++) {
emptyStreams.set(i, !files.get(i).hasStream());
}
final ByteArrayOutputStream baos = new ByteArrayOutputStream();
final DataOutputStream out = new DataOutputStream(baos);
writeBits(out, emptyStreams, files.size());
out.flush();
final byte[] contents = baos.toByteArray();
writeUint64(header, contents.length);
header.write(contents);
}
}
private void writeFileMTimes(final DataOutput header) throws IOException {
int numLastModifiedDates = 0;
for (final SevenZArchiveEntry entry : files) {
if (entry.getHasLastModifiedDate()) {
++numLastModifiedDates;
}
}
if (numLastModifiedDates > 0) {
header.write(NID.kMTime);
final ByteArrayOutputStream baos = new ByteArrayOutputStream();
final DataOutputStream out = new DataOutputStream(baos);
if (numLastModifiedDates != files.size()) {
out.write(0);
final BitSet mTimes = new BitSet(files.size());
for (int i = 0; i < files.size(); i++) {
mTimes.set(i, files.get(i).getHasLastModifiedDate());
}
writeBits(out, mTimes, files.size());
} else {
out.write(1); // "allAreDefined" == true
}
out.write(0);
for (final SevenZArchiveEntry entry : files) {
if (entry.getHasLastModifiedDate()) {
final long ntfsTime = FileTimes.toNtfsTime(entry.getLastModifiedTime());
out.writeLong(Long.reverseBytes(ntfsTime));
}
}
out.flush();
final byte[] contents = baos.toByteArray();
writeUint64(header, contents.length);
header.write(contents);
}
}
private void writeFileNames(final DataOutput header) throws IOException {
header.write(NID.kName);
final ByteArrayOutputStream baos = new ByteArrayOutputStream();
final DataOutputStream out = new DataOutputStream(baos);
out.write(0);
for (final SevenZArchiveEntry entry : files) {
out.write(entry.getName().getBytes(UTF_16LE));
out.writeShort(0);
}
out.flush();
final byte[] contents = baos.toByteArray();
writeUint64(header, contents.length);
header.write(contents);
}
private void writeFilesInfo(final DataOutput header) throws IOException {
header.write(NID.kFilesInfo);
writeUint64(header, files.size());
writeFileEmptyStreams(header);
writeFileEmptyFiles(header);
writeFileAntiItems(header);
writeFileNames(header);
writeFileCTimes(header);
writeFileATimes(header);
writeFileMTimes(header);
writeFileWindowsAttributes(header);
header.write(NID.kEnd);
}
private void writeFileWindowsAttributes(final DataOutput header) throws IOException {
int numWindowsAttributes = 0;
for (final SevenZArchiveEntry entry : files) {
if (entry.getHasWindowsAttributes()) {
++numWindowsAttributes;
}
}
if (numWindowsAttributes > 0) {
header.write(NID.kWinAttributes);
final ByteArrayOutputStream baos = new ByteArrayOutputStream();
final DataOutputStream out = new DataOutputStream(baos);
if (numWindowsAttributes != files.size()) {
out.write(0);
final BitSet attributes = new BitSet(files.size());
for (int i = 0; i < files.size(); i++) {
attributes.set(i, files.get(i).getHasWindowsAttributes());
}
writeBits(out, attributes, files.size());
} else {
out.write(1); // "allAreDefined" == true
}
out.write(0);
for (final SevenZArchiveEntry entry : files) {
if (entry.getHasWindowsAttributes()) {
out.writeInt(Integer.reverseBytes(entry.getWindowsAttributes()));
}
}
out.flush();
final byte[] contents = baos.toByteArray();
writeUint64(header, contents.length);
header.write(contents);
}
}
private void writeFolder(final DataOutput header, final SevenZArchiveEntry entry) throws IOException {
final ByteArrayOutputStream bos = new ByteArrayOutputStream();
int numCoders = 0;
for (final SevenZMethodConfiguration m : getContentMethods(entry)) {
numCoders++;
writeSingleCodec(m, bos);
}
writeUint64(header, numCoders);
header.write(bos.toByteArray());
for (long i = 0; i < numCoders - 1; i++) {
writeUint64(header, i + 1);
writeUint64(header, i);
}
}
private void writeHeader(final DataOutput header) throws IOException {
header.write(NID.kHeader);
header.write(NID.kMainStreamsInfo);
writeStreamsInfo(header);
writeFilesInfo(header);
header.write(NID.kEnd);
}
private void writePackInfo(final DataOutput header) throws IOException {
header.write(NID.kPackInfo);
writeUint64(header, 0);
writeUint64(header, 0xffffFFFFL & numNonEmptyStreams);
header.write(NID.kSize);
for (final SevenZArchiveEntry entry : files) {
if (entry.hasStream()) {
writeUint64(header, entry.getCompressedSize());
}
}
header.write(NID.kCRC);
header.write(1); // "allAreDefined" == true
for (final SevenZArchiveEntry entry : files) {
if (entry.hasStream()) {
header.writeInt(Integer.reverseBytes((int) entry.getCompressedCrcValue()));
}
}
header.write(NID.kEnd);
}
private void writeSingleCodec(final SevenZMethodConfiguration m, final OutputStream bos) throws IOException {
final byte[] id = m.getMethod().getId();
final byte[] properties = Coders.findByMethod(m.getMethod()).getOptionsAsProperties(m.getOptions());
int codecFlags = id.length;
if (properties.length > 0) {
codecFlags |= 0x20;
}
bos.write(codecFlags);
bos.write(id);
if (properties.length > 0) {
bos.write(properties.length);
bos.write(properties);
}
}
private void writeStreamsInfo(final DataOutput header) throws IOException {
if (numNonEmptyStreams > 0) {
writePackInfo(header);
writeUnpackInfo(header);
}
writeSubStreamsInfo(header);
header.write(NID.kEnd);
}
private void writeSubStreamsInfo(final DataOutput header) throws IOException {
header.write(NID.kSubStreamsInfo);
//
// header.write(NID.kCRC);
// header.write(1);
// for (final SevenZArchiveEntry entry : files) {
// if (entry.getHasCrc()) {
// header.writeInt(Integer.reverseBytes(entry.getCrc()));
// }
// }
//
header.write(NID.kEnd);
}
private void writeUint64(final DataOutput header, long value) throws IOException {
int firstByte = 0;
int mask = 0x80;
int i;
for (i = 0; i < 8; i++) {
if (value < 1L << 7 * (i + 1)) {
firstByte |= value >>> 8 * i;
break;
}
firstByte |= mask;
mask >>>= 1;
}
header.write(firstByte);
for (; i > 0; i--) {
header.write((int) (0xff & value));
value >>>= 8;
}
}
private void writeUnpackInfo(final DataOutput header) throws IOException {
header.write(NID.kUnpackInfo);
header.write(NID.kFolder);
writeUint64(header, numNonEmptyStreams);
header.write(0);
for (final SevenZArchiveEntry entry : files) {
if (entry.hasStream()) {
writeFolder(header, entry);
}
}
header.write(NID.kCodersUnpackSize);
for (final SevenZArchiveEntry entry : files) {
if (entry.hasStream()) {
final long[] moreSizes = additionalSizes.get(entry);
if (moreSizes != null) {
for (final long s : moreSizes) {
writeUint64(header, s);
}
}
writeUint64(header, entry.getSize());
}
}
header.write(NID.kCRC);
header.write(1); // "allAreDefined" == true
for (final SevenZArchiveEntry entry : files) {
if (entry.hasStream()) {
header.writeInt(Integer.reverseBytes((int) entry.getCrcValue()));
}
}
header.write(NID.kEnd);
}
}
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