HADOOP-17292. Using lz4-java in Lz4Codec (#2350)
Contributed by Liang-Chi Hsieh.
This commit is contained in:
Liang-Chi Hsieh
Chao Sun
parent
b8a4361d7b
commit
87064df1f2
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@ -371,6 +371,11 @@
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<artifactId>snappy-java</artifactId>
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<scope>compile</scope>
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</dependency>
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<dependency>
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<groupId>org.lz4</groupId>
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<artifactId>lz4-java</artifactId>
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<scope>provided</scope>
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</dependency>
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</dependencies>
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<build>
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@ -577,11 +582,6 @@
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<exclude>src/main/native/m4/*</exclude>
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<exclude>src/test/empty-file</exclude>
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<exclude>src/test/all-tests</exclude>
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<exclude>src/main/native/src/org/apache/hadoop/io/compress/lz4/lz4.h</exclude>
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<exclude>src/main/native/src/org/apache/hadoop/io/compress/lz4/lz4.c</exclude>
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<exclude>src/main/native/src/org/apache/hadoop/io/compress/lz4/lz4hc.h</exclude>
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<exclude>src/main/native/src/org/apache/hadoop/io/compress/lz4/lz4hc.c</exclude>
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<exclude>src/main/native/src/org/apache/hadoop/io/compress/lz4/lz4hc_encoder.h</exclude>
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<exclude>src/main/native/gtest/**/*</exclude>
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<exclude>src/test/resources/test-untar.tgz</exclude>
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<exclude>src/test/resources/test.har/_SUCCESS</exclude>
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@ -236,10 +236,6 @@ configure_file(${CMAKE_SOURCE_DIR}/config.h.cmake ${CMAKE_BINARY_DIR}/config.h)
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set(CMAKE_BUILD_WITH_INSTALL_RPATH TRUE)
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hadoop_add_dual_library(hadoop
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main/native/src/exception.c
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${SRC}/io/compress/lz4/Lz4Compressor.c
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${SRC}/io/compress/lz4/Lz4Decompressor.c
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${SRC}/io/compress/lz4/lz4.c
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${SRC}/io/compress/lz4/lz4hc.c
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${ISAL_SOURCE_FILES}
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${ZSTD_SOURCE_FILES}
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${OPENSSL_SOURCE_FILES}
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@ -27,17 +27,12 @@
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import org.apache.hadoop.io.compress.lz4.Lz4Compressor;
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import org.apache.hadoop.io.compress.lz4.Lz4Decompressor;
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import org.apache.hadoop.fs.CommonConfigurationKeys;
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import org.apache.hadoop.util.NativeCodeLoader;
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/**
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* This class creates lz4 compressors/decompressors.
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*/
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public class Lz4Codec implements Configurable, CompressionCodec {
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static {
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NativeCodeLoader.isNativeCodeLoaded();
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}
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Configuration conf;
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/**
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@ -60,19 +55,6 @@ public Configuration getConf() {
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return conf;
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}
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/**
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* Are the native lz4 libraries loaded & initialized?
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*
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* @return true if loaded & initialized, otherwise false
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*/
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public static boolean isNativeCodeLoaded() {
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return NativeCodeLoader.isNativeCodeLoaded();
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}
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public static String getLibraryName() {
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return Lz4Compressor.getLibraryName();
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}
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/**
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* Create a {@link CompressionOutputStream} that will write to the given
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* {@link OutputStream}.
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@ -101,9 +83,6 @@ public CompressionOutputStream createOutputStream(OutputStream out)
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public CompressionOutputStream createOutputStream(OutputStream out,
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Compressor compressor)
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throws IOException {
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if (!isNativeCodeLoaded()) {
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throw new RuntimeException("native lz4 library not available");
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}
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int bufferSize = conf.getInt(
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CommonConfigurationKeys.IO_COMPRESSION_CODEC_LZ4_BUFFERSIZE_KEY,
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CommonConfigurationKeys.IO_COMPRESSION_CODEC_LZ4_BUFFERSIZE_DEFAULT);
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@ -121,10 +100,6 @@ public CompressionOutputStream createOutputStream(OutputStream out,
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*/
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@Override
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public Class<? extends Compressor> getCompressorType() {
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if (!isNativeCodeLoaded()) {
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throw new RuntimeException("native lz4 library not available");
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}
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return Lz4Compressor.class;
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}
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@ -135,9 +110,6 @@ public Class<? extends Compressor> getCompressorType() {
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*/
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@Override
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public Compressor createCompressor() {
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if (!isNativeCodeLoaded()) {
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throw new RuntimeException("native lz4 library not available");
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}
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int bufferSize = conf.getInt(
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CommonConfigurationKeys.IO_COMPRESSION_CODEC_LZ4_BUFFERSIZE_KEY,
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CommonConfigurationKeys.IO_COMPRESSION_CODEC_LZ4_BUFFERSIZE_DEFAULT);
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@ -175,10 +147,6 @@ public CompressionInputStream createInputStream(InputStream in)
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public CompressionInputStream createInputStream(InputStream in,
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Decompressor decompressor)
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throws IOException {
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if (!isNativeCodeLoaded()) {
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throw new RuntimeException("native lz4 library not available");
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}
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return new BlockDecompressorStream(in, decompressor, conf.getInt(
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CommonConfigurationKeys.IO_COMPRESSION_CODEC_LZ4_BUFFERSIZE_KEY,
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CommonConfigurationKeys.IO_COMPRESSION_CODEC_LZ4_BUFFERSIZE_DEFAULT));
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@ -191,10 +159,6 @@ public CompressionInputStream createInputStream(InputStream in,
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*/
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@Override
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public Class<? extends Decompressor> getDecompressorType() {
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if (!isNativeCodeLoaded()) {
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throw new RuntimeException("native lz4 library not available");
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}
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return Lz4Decompressor.class;
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}
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@ -205,9 +169,6 @@ public Class<? extends Decompressor> getDecompressorType() {
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*/
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@Override
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public Decompressor createDecompressor() {
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if (!isNativeCodeLoaded()) {
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throw new RuntimeException("native lz4 library not available");
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}
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int bufferSize = conf.getInt(
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CommonConfigurationKeys.IO_COMPRESSION_CODEC_LZ4_BUFFERSIZE_KEY,
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CommonConfigurationKeys.IO_COMPRESSION_CODEC_LZ4_BUFFERSIZE_DEFAULT);
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@ -22,9 +22,11 @@
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import java.nio.Buffer;
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import java.nio.ByteBuffer;
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import net.jpountz.lz4.LZ4Factory;
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import net.jpountz.lz4.LZ4Compressor;
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import org.apache.hadoop.conf.Configuration;
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import org.apache.hadoop.io.compress.Compressor;
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import org.apache.hadoop.util.NativeCodeLoader;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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@ -48,22 +50,7 @@ public class Lz4Compressor implements Compressor {
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private long bytesRead = 0L;
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private long bytesWritten = 0L;
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private final boolean useLz4HC;
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static {
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if (NativeCodeLoader.isNativeCodeLoaded()) {
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// Initialize the native library
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try {
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initIDs();
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} catch (Throwable t) {
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// Ignore failure to load/initialize lz4
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LOG.warn(t.toString());
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}
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} else {
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LOG.error("Cannot load " + Lz4Compressor.class.getName() +
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" without native hadoop library!");
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}
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}
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private final LZ4Compressor lz4Compressor;
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/**
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* Creates a new compressor.
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@ -73,9 +60,21 @@ public class Lz4Compressor implements Compressor {
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* which trades CPU for compression ratio.
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*/
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public Lz4Compressor(int directBufferSize, boolean useLz4HC) {
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this.useLz4HC = useLz4HC;
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this.directBufferSize = directBufferSize;
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try {
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LZ4Factory lz4Factory = LZ4Factory.fastestInstance();
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if (useLz4HC) {
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lz4Compressor = lz4Factory.highCompressor();
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} else {
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lz4Compressor = lz4Factory.fastCompressor();
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}
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} catch (AssertionError t) {
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throw new RuntimeException("lz4-java library is not available: " +
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"Lz4Compressor has not been loaded. You need to add " +
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"lz4-java.jar to your CLASSPATH. " + t, t);
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}
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uncompressedDirectBuf = ByteBuffer.allocateDirect(directBufferSize);
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compressedDirectBuf = ByteBuffer.allocateDirect(directBufferSize);
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compressedDirectBuf.position(directBufferSize);
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@ -236,7 +235,7 @@ public synchronized int compress(byte[] b, int off, int len)
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}
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// Compress data
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n = useLz4HC ? compressBytesDirectHC() : compressBytesDirect();
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n = compressDirectBuf();
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compressedDirectBuf.limit(n);
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uncompressedDirectBuf.clear(); // lz4 consumes all buffer input
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@ -302,11 +301,20 @@ public synchronized long getBytesWritten() {
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public synchronized void end() {
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}
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private native static void initIDs();
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private native int compressBytesDirect();
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private native int compressBytesDirectHC();
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public native static String getLibraryName();
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private int compressDirectBuf() {
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if (uncompressedDirectBufLen == 0) {
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return 0;
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} else {
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// Set the position and limit of `uncompressedDirectBuf` for reading
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uncompressedDirectBuf.limit(uncompressedDirectBufLen).position(0);
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compressedDirectBuf.clear();
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lz4Compressor.compress((ByteBuffer) uncompressedDirectBuf,
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(ByteBuffer) compressedDirectBuf);
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uncompressedDirectBufLen = 0;
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uncompressedDirectBuf.limit(directBufferSize).position(0);
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int size = compressedDirectBuf.position();
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compressedDirectBuf.position(0);
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return size;
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}
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}
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}
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@ -22,8 +22,10 @@
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import java.nio.Buffer;
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import java.nio.ByteBuffer;
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import net.jpountz.lz4.LZ4Factory;
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import net.jpountz.lz4.LZ4SafeDecompressor;
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import org.apache.hadoop.io.compress.Decompressor;
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import org.apache.hadoop.util.NativeCodeLoader;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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@ -44,20 +46,7 @@ public class Lz4Decompressor implements Decompressor {
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private int userBufOff = 0, userBufLen = 0;
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private boolean finished;
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static {
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if (NativeCodeLoader.isNativeCodeLoaded()) {
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// Initialize the native library
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try {
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initIDs();
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} catch (Throwable t) {
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// Ignore failure to load/initialize lz4
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LOG.warn(t.toString());
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}
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} else {
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LOG.error("Cannot load " + Lz4Compressor.class.getName() +
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" without native hadoop library!");
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}
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}
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private LZ4SafeDecompressor lz4Decompressor;
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/**
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* Creates a new compressor.
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@ -67,6 +56,15 @@ public class Lz4Decompressor implements Decompressor {
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public Lz4Decompressor(int directBufferSize) {
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this.directBufferSize = directBufferSize;
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try {
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LZ4Factory lz4Factory = LZ4Factory.fastestInstance();
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lz4Decompressor = lz4Factory.safeDecompressor();
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} catch (AssertionError t) {
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throw new RuntimeException("lz4-java library is not available: " +
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"Lz4Decompressor has not been loaded. You need to add " +
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"lz4-java.jar to your CLASSPATH. " + t, t);
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}
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compressedDirectBuf = ByteBuffer.allocateDirect(directBufferSize);
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uncompressedDirectBuf = ByteBuffer.allocateDirect(directBufferSize);
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uncompressedDirectBuf.position(directBufferSize);
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@ -200,7 +198,7 @@ public synchronized boolean finished() {
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* @param b Buffer for the compressed data
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* @param off Start offset of the data
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* @param len Size of the buffer
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* @return The actual number of bytes of compressed data.
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* @return The actual number of bytes of uncompressed data.
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* @throws IOException
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*/
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@Override
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@ -228,7 +226,7 @@ public synchronized int decompress(byte[] b, int off, int len)
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uncompressedDirectBuf.limit(directBufferSize);
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// Decompress data
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n = decompressBytesDirect();
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n = decompressDirectBuf();
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uncompressedDirectBuf.limit(n);
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if (userBufLen <= 0) {
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@ -272,7 +270,18 @@ public synchronized void end() {
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// do nothing
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}
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private native static void initIDs();
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private native int decompressBytesDirect();
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private int decompressDirectBuf() {
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if (compressedDirectBufLen == 0) {
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return 0;
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} else {
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compressedDirectBuf.limit(compressedDirectBufLen).position(0);
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lz4Decompressor.decompress((ByteBuffer) compressedDirectBuf,
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(ByteBuffer) uncompressedDirectBuf);
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compressedDirectBufLen = 0;
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compressedDirectBuf.clear();
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int size = uncompressedDirectBuf.position();
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uncompressedDirectBuf.position(0);
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return size;
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}
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}
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}
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@ -22,7 +22,6 @@
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import org.apache.hadoop.io.erasurecode.ErasureCodeNative;
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import org.apache.hadoop.conf.Configuration;
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import org.apache.hadoop.crypto.OpensslCipher;
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import org.apache.hadoop.io.compress.Lz4Codec;
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import org.apache.hadoop.io.compress.bzip2.Bzip2Factory;
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import org.apache.hadoop.io.compress.zlib.ZlibFactory;
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import org.apache.hadoop.classification.InterfaceAudience;
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@ -69,8 +68,6 @@ public static void main(String[] args) {
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boolean isalLoaded = false;
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boolean zStdLoaded = false;
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boolean pmdkLoaded = false;
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// lz4 is linked within libhadoop
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boolean lz4Loaded = nativeHadoopLoaded;
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boolean bzip2Loaded = Bzip2Factory.isNativeBzip2Loaded(conf);
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boolean openSslLoaded = false;
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boolean winutilsExists = false;
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@ -81,7 +78,6 @@ public static void main(String[] args) {
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String isalDetail = "";
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String pmdkDetail = "";
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String zstdLibraryName = "";
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String lz4LibraryName = "";
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String bzip2LibraryName = "";
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String winutilsPath = null;
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@ -119,9 +115,6 @@ public static void main(String[] args) {
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openSslLoaded = true;
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}
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if (lz4Loaded) {
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lz4LibraryName = Lz4Codec.getLibraryName();
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}
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if (bzip2Loaded) {
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bzip2LibraryName = Bzip2Factory.getLibraryName(conf);
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}
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@ -144,7 +137,6 @@ public static void main(String[] args) {
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System.out.printf("hadoop: %b %s%n", nativeHadoopLoaded, hadoopLibraryName);
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System.out.printf("zlib: %b %s%n", zlibLoaded, zlibLibraryName);
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System.out.printf("zstd : %b %s%n", zStdLoaded, zstdLibraryName);
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System.out.printf("lz4: %b %s%n", lz4Loaded, lz4LibraryName);
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System.out.printf("bzip2: %b %s%n", bzip2Loaded, bzip2LibraryName);
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System.out.printf("openssl: %b %s%n", openSslLoaded, openSslDetail);
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System.out.printf("ISA-L: %b %s%n", isalLoaded, isalDetail);
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@ -155,8 +147,8 @@ public static void main(String[] args) {
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}
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if ((!nativeHadoopLoaded) || (Shell.WINDOWS && (!winutilsExists)) ||
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(checkAll && !(zlibLoaded && lz4Loaded
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&& bzip2Loaded && isalLoaded && zStdLoaded))) {
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(checkAll && !(zlibLoaded && bzip2Loaded
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&& isalLoaded && zStdLoaded))) {
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// return 1 to indicated check failed
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ExitUtil.terminate(1);
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}
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@ -1,128 +0,0 @@
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/*
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* 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
|
||||
*
|
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* 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.
|
||||
*/
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|
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#include "org_apache_hadoop.h"
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#include "org_apache_hadoop_io_compress_lz4_Lz4Compressor.h"
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#ifdef UNIX
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#include "config.h"
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#endif // UNIX
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#include "lz4.h"
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#include "lz4hc.h"
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static jfieldID Lz4Compressor_uncompressedDirectBuf;
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static jfieldID Lz4Compressor_uncompressedDirectBufLen;
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static jfieldID Lz4Compressor_compressedDirectBuf;
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static jfieldID Lz4Compressor_directBufferSize;
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JNIEXPORT void JNICALL Java_org_apache_hadoop_io_compress_lz4_Lz4Compressor_initIDs
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(JNIEnv *env, jclass clazz){
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Lz4Compressor_uncompressedDirectBuf = (*env)->GetFieldID(env, clazz,
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"uncompressedDirectBuf",
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"Ljava/nio/Buffer;");
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Lz4Compressor_uncompressedDirectBufLen = (*env)->GetFieldID(env, clazz,
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"uncompressedDirectBufLen", "I");
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Lz4Compressor_compressedDirectBuf = (*env)->GetFieldID(env, clazz,
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"compressedDirectBuf",
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"Ljava/nio/Buffer;");
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Lz4Compressor_directBufferSize = (*env)->GetFieldID(env, clazz,
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"directBufferSize", "I");
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}
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JNIEXPORT jint JNICALL Java_org_apache_hadoop_io_compress_lz4_Lz4Compressor_compressBytesDirect
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(JNIEnv *env, jobject thisj){
|
||||
const char* uncompressed_bytes;
|
||||
char *compressed_bytes;
|
||||
|
||||
// Get members of Lz4Compressor
|
||||
jobject uncompressed_direct_buf = (*env)->GetObjectField(env, thisj, Lz4Compressor_uncompressedDirectBuf);
|
||||
jint uncompressed_direct_buf_len = (*env)->GetIntField(env, thisj, Lz4Compressor_uncompressedDirectBufLen);
|
||||
jobject compressed_direct_buf = (*env)->GetObjectField(env, thisj, Lz4Compressor_compressedDirectBuf);
|
||||
jint compressed_direct_buf_len = (*env)->GetIntField(env, thisj, Lz4Compressor_directBufferSize);
|
||||
|
||||
// Get the input direct buffer
|
||||
uncompressed_bytes = (const char*)(*env)->GetDirectBufferAddress(env, uncompressed_direct_buf);
|
||||
|
||||
if (uncompressed_bytes == 0) {
|
||||
return (jint)0;
|
||||
}
|
||||
|
||||
// Get the output direct buffer
|
||||
compressed_bytes = (char *)(*env)->GetDirectBufferAddress(env, compressed_direct_buf);
|
||||
|
||||
if (compressed_bytes == 0) {
|
||||
return (jint)0;
|
||||
}
|
||||
|
||||
compressed_direct_buf_len = LZ4_compress(uncompressed_bytes, compressed_bytes, uncompressed_direct_buf_len);
|
||||
if (compressed_direct_buf_len < 0){
|
||||
THROW(env, "java/lang/InternalError", "LZ4_compress failed");
|
||||
}
|
||||
|
||||
(*env)->SetIntField(env, thisj, Lz4Compressor_uncompressedDirectBufLen, 0);
|
||||
|
||||
return (jint)compressed_direct_buf_len;
|
||||
}
|
||||
|
||||
JNIEXPORT jstring JNICALL
|
||||
Java_org_apache_hadoop_io_compress_lz4_Lz4Compressor_getLibraryName(
|
||||
JNIEnv *env, jclass class
|
||||
) {
|
||||
char version_buf[128];
|
||||
snprintf(version_buf, sizeof(version_buf), "revision:%d", LZ4_versionNumber());
|
||||
return (*env)->NewStringUTF(env, version_buf);
|
||||
}
|
||||
|
||||
JNIEXPORT jint JNICALL Java_org_apache_hadoop_io_compress_lz4_Lz4Compressor_compressBytesDirectHC
|
||||
(JNIEnv *env, jobject thisj){
|
||||
const char* uncompressed_bytes = NULL;
|
||||
char* compressed_bytes = NULL;
|
||||
|
||||
// Get members of Lz4Compressor
|
||||
jobject uncompressed_direct_buf = (*env)->GetObjectField(env, thisj, Lz4Compressor_uncompressedDirectBuf);
|
||||
jint uncompressed_direct_buf_len = (*env)->GetIntField(env, thisj, Lz4Compressor_uncompressedDirectBufLen);
|
||||
jobject compressed_direct_buf = (*env)->GetObjectField(env, thisj, Lz4Compressor_compressedDirectBuf);
|
||||
jint compressed_direct_buf_len = (*env)->GetIntField(env, thisj, Lz4Compressor_directBufferSize);
|
||||
|
||||
// Get the input direct buffer
|
||||
uncompressed_bytes = (const char*)(*env)->GetDirectBufferAddress(env, uncompressed_direct_buf);
|
||||
|
||||
if (uncompressed_bytes == 0) {
|
||||
return (jint)0;
|
||||
}
|
||||
|
||||
// Get the output direct buffer
|
||||
compressed_bytes = (char *)(*env)->GetDirectBufferAddress(env, compressed_direct_buf);
|
||||
|
||||
if (compressed_bytes == 0) {
|
||||
return (jint)0;
|
||||
}
|
||||
|
||||
compressed_direct_buf_len = LZ4_compressHC(uncompressed_bytes, compressed_bytes, uncompressed_direct_buf_len);
|
||||
if (compressed_direct_buf_len < 0){
|
||||
THROW(env, "java/lang/InternalError", "LZ4_compressHC failed");
|
||||
}
|
||||
|
||||
(*env)->SetIntField(env, thisj, Lz4Compressor_uncompressedDirectBufLen, 0);
|
||||
|
||||
return (jint)compressed_direct_buf_len;
|
||||
}
|
||||
|
|
@ -1,81 +0,0 @@
|
|||
/*
|
||||
* 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.
|
||||
*/
|
||||
|
||||
#include "org_apache_hadoop.h"
|
||||
#include "org_apache_hadoop_io_compress_lz4_Lz4Decompressor.h"
|
||||
|
||||
#ifdef UNIX
|
||||
#include "config.h"
|
||||
#endif // UNIX
|
||||
#include "lz4.h"
|
||||
|
||||
|
||||
static jfieldID Lz4Decompressor_compressedDirectBuf;
|
||||
static jfieldID Lz4Decompressor_compressedDirectBufLen;
|
||||
static jfieldID Lz4Decompressor_uncompressedDirectBuf;
|
||||
static jfieldID Lz4Decompressor_directBufferSize;
|
||||
|
||||
JNIEXPORT void JNICALL Java_org_apache_hadoop_io_compress_lz4_Lz4Decompressor_initIDs
|
||||
(JNIEnv *env, jclass clazz){
|
||||
|
||||
Lz4Decompressor_compressedDirectBuf = (*env)->GetFieldID(env,clazz,
|
||||
"compressedDirectBuf",
|
||||
"Ljava/nio/Buffer;");
|
||||
Lz4Decompressor_compressedDirectBufLen = (*env)->GetFieldID(env,clazz,
|
||||
"compressedDirectBufLen", "I");
|
||||
Lz4Decompressor_uncompressedDirectBuf = (*env)->GetFieldID(env,clazz,
|
||||
"uncompressedDirectBuf",
|
||||
"Ljava/nio/Buffer;");
|
||||
Lz4Decompressor_directBufferSize = (*env)->GetFieldID(env, clazz,
|
||||
"directBufferSize", "I");
|
||||
}
|
||||
|
||||
JNIEXPORT jint JNICALL Java_org_apache_hadoop_io_compress_lz4_Lz4Decompressor_decompressBytesDirect
|
||||
(JNIEnv *env, jobject thisj){
|
||||
const char *compressed_bytes;
|
||||
char *uncompressed_bytes;
|
||||
|
||||
// Get members of Lz4Decompressor
|
||||
jobject compressed_direct_buf = (*env)->GetObjectField(env,thisj, Lz4Decompressor_compressedDirectBuf);
|
||||
jint compressed_direct_buf_len = (*env)->GetIntField(env,thisj, Lz4Decompressor_compressedDirectBufLen);
|
||||
jobject uncompressed_direct_buf = (*env)->GetObjectField(env,thisj, Lz4Decompressor_uncompressedDirectBuf);
|
||||
size_t uncompressed_direct_buf_len = (*env)->GetIntField(env, thisj, Lz4Decompressor_directBufferSize);
|
||||
|
||||
// Get the input direct buffer
|
||||
compressed_bytes = (const char*)(*env)->GetDirectBufferAddress(env, compressed_direct_buf);
|
||||
|
||||
if (compressed_bytes == 0) {
|
||||
return (jint)0;
|
||||
}
|
||||
|
||||
// Get the output direct buffer
|
||||
uncompressed_bytes = (char *)(*env)->GetDirectBufferAddress(env, uncompressed_direct_buf);
|
||||
|
||||
if (uncompressed_bytes == 0) {
|
||||
return (jint)0;
|
||||
}
|
||||
|
||||
uncompressed_direct_buf_len = LZ4_decompress_safe(compressed_bytes, uncompressed_bytes, compressed_direct_buf_len, uncompressed_direct_buf_len);
|
||||
if (uncompressed_direct_buf_len < 0) {
|
||||
THROW(env, "java/lang/InternalError", "LZ4_uncompress_unknownOutputSize failed.");
|
||||
}
|
||||
|
||||
(*env)->SetIntField(env, thisj, Lz4Decompressor_compressedDirectBufLen, 0);
|
||||
|
||||
return (jint)uncompressed_direct_buf_len;
|
||||
}
|
||||
|
|
@ -1,897 +0,0 @@
|
|||
/*
|
||||
LZ4 HC - High Compression Mode of LZ4
|
||||
Copyright (C) 2011-2014, Yann Collet.
|
||||
BSD 2-Clause License (http://www.opensource.org/licenses/bsd-license.php)
|
||||
|
||||
Redistribution and use in source and binary forms, with or without
|
||||
modification, are permitted provided that the following conditions are
|
||||
met:
|
||||
|
||||
* Redistributions of source code must retain the above copyright
|
||||
notice, this list of conditions and the following disclaimer.
|
||||
* Redistributions in binary form must reproduce the above
|
||||
copyright notice, this list of conditions and the following disclaimer
|
||||
in the documentation and/or other materials provided with the
|
||||
distribution.
|
||||
|
||||
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
||||
"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
||||
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
|
||||
A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
|
||||
OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
||||
SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
|
||||
LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
||||
DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
||||
THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
||||
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
||||
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
||||
|
||||
You can contact the author at :
|
||||
- LZ4 homepage : http://fastcompression.blogspot.com/p/lz4.html
|
||||
- LZ4 source repository : http://code.google.com/p/lz4/
|
||||
*/
|
||||
|
||||
|
||||
|
||||
/**************************************
|
||||
Tuning Parameter
|
||||
**************************************/
|
||||
#define LZ4HC_DEFAULT_COMPRESSIONLEVEL 8
|
||||
|
||||
|
||||
/**************************************
|
||||
Memory routines
|
||||
**************************************/
|
||||
#include <stdlib.h> /* calloc, free */
|
||||
#define ALLOCATOR(s) calloc(1,s)
|
||||
#define FREEMEM free
|
||||
#include <string.h> /* memset, memcpy */
|
||||
#define MEM_INIT memset
|
||||
|
||||
|
||||
/**************************************
|
||||
CPU Feature Detection
|
||||
**************************************/
|
||||
/* 32 or 64 bits ? */
|
||||
#if (defined(__x86_64__) || defined(_M_X64) || defined(_WIN64) \
|
||||
|| defined(__64BIT__) || defined(__mips64) \
|
||||
|| defined(__powerpc64__) || defined(__powerpc64le__) \
|
||||
|| defined(__ppc64__) || defined(__ppc64le__) \
|
||||
|| defined(__PPC64__) || defined(__PPC64LE__) \
|
||||
|| defined(__ia64) || defined(__itanium__) || defined(_M_IA64) \
|
||||
|| defined(__s390x__) ) /* Detects 64 bits mode */
|
||||
# define LZ4_ARCH64 1
|
||||
#else
|
||||
# define LZ4_ARCH64 0
|
||||
#endif
|
||||
|
||||
/*
|
||||
* Little Endian or Big Endian ?
|
||||
* Overwrite the #define below if you know your architecture endianess
|
||||
*/
|
||||
#include <stdlib.h> /* Apparently required to detect endianess */
|
||||
#if defined (__GLIBC__)
|
||||
# include <endian.h>
|
||||
# if (__BYTE_ORDER == __BIG_ENDIAN)
|
||||
# define LZ4_BIG_ENDIAN 1
|
||||
# endif
|
||||
#elif (defined(__BIG_ENDIAN__) || defined(__BIG_ENDIAN) || defined(_BIG_ENDIAN)) && !(defined(__LITTLE_ENDIAN__) || defined(__LITTLE_ENDIAN) || defined(_LITTLE_ENDIAN))
|
||||
# define LZ4_BIG_ENDIAN 1
|
||||
#elif defined(__sparc) || defined(__sparc__) \
|
||||
|| defined(__powerpc__) || defined(__ppc__) || defined(__PPC__) \
|
||||
|| defined(__hpux) || defined(__hppa) \
|
||||
|| defined(_MIPSEB) || defined(__s390__)
|
||||
# define LZ4_BIG_ENDIAN 1
|
||||
#else
|
||||
/* Little Endian assumed. PDP Endian and other very rare endian format are unsupported. */
|
||||
#endif
|
||||
|
||||
/*
|
||||
* Unaligned memory access is automatically enabled for "common" CPU, such as x86.
|
||||
* For others CPU, the compiler will be more cautious, and insert extra code to ensure aligned access is respected
|
||||
* If you know your target CPU supports unaligned memory access, you want to force this option manually to improve performance
|
||||
*/
|
||||
#if defined(__ARM_FEATURE_UNALIGNED)
|
||||
# define LZ4_FORCE_UNALIGNED_ACCESS 1
|
||||
#endif
|
||||
|
||||
/* Define this parameter if your target system or compiler does not support hardware bit count */
|
||||
#if defined(_MSC_VER) && defined(_WIN32_WCE) /* Visual Studio for Windows CE does not support Hardware bit count */
|
||||
# define LZ4_FORCE_SW_BITCOUNT
|
||||
#endif
|
||||
|
||||
|
||||
/**************************************
|
||||
Compiler Options
|
||||
**************************************/
|
||||
#if defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) /* C99 */
|
||||
/* "restrict" is a known keyword */
|
||||
#else
|
||||
# define restrict /* Disable restrict */
|
||||
#endif
|
||||
|
||||
#ifdef _MSC_VER /* Visual Studio */
|
||||
# define FORCE_INLINE static __forceinline
|
||||
# include <intrin.h> /* For Visual 2005 */
|
||||
# if LZ4_ARCH64 /* 64-bits */
|
||||
# pragma intrinsic(_BitScanForward64) /* For Visual 2005 */
|
||||
# pragma intrinsic(_BitScanReverse64) /* For Visual 2005 */
|
||||
# else /* 32-bits */
|
||||
# pragma intrinsic(_BitScanForward) /* For Visual 2005 */
|
||||
# pragma intrinsic(_BitScanReverse) /* For Visual 2005 */
|
||||
# endif
|
||||
# pragma warning(disable : 4127) /* disable: C4127: conditional expression is constant */
|
||||
# pragma warning(disable : 4701) /* disable: C4701: potentially uninitialized local variable used */
|
||||
#else
|
||||
# ifdef __GNUC__
|
||||
# define FORCE_INLINE static inline __attribute__((always_inline))
|
||||
# else
|
||||
# define FORCE_INLINE static inline
|
||||
# endif
|
||||
#endif
|
||||
|
||||
#ifdef _MSC_VER /* Visual Studio */
|
||||
# define lz4_bswap16(x) _byteswap_ushort(x)
|
||||
#else
|
||||
# define lz4_bswap16(x) ((unsigned short int) ((((x) >> 8) & 0xffu) | (((x) & 0xffu) << 8)))
|
||||
#endif
|
||||
|
||||
|
||||
/**************************************
|
||||
Includes
|
||||
**************************************/
|
||||
#include "lz4hc.h"
|
||||
#include "lz4.h"
|
||||
|
||||
|
||||
/**************************************
|
||||
Basic Types
|
||||
**************************************/
|
||||
#if defined (__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) /* C99 */
|
||||
# include <stdint.h>
|
||||
typedef uint8_t BYTE;
|
||||
typedef uint16_t U16;
|
||||
typedef uint32_t U32;
|
||||
typedef int32_t S32;
|
||||
typedef uint64_t U64;
|
||||
#else
|
||||
typedef unsigned char BYTE;
|
||||
typedef unsigned short U16;
|
||||
typedef unsigned int U32;
|
||||
typedef signed int S32;
|
||||
typedef unsigned long long U64;
|
||||
#endif
|
||||
|
||||
#if defined(__GNUC__) && !defined(LZ4_FORCE_UNALIGNED_ACCESS)
|
||||
# define _PACKED __attribute__ ((packed))
|
||||
#else
|
||||
# define _PACKED
|
||||
#endif
|
||||
|
||||
#if !defined(LZ4_FORCE_UNALIGNED_ACCESS) && !defined(__GNUC__)
|
||||
# ifdef __IBMC__
|
||||
# pragma pack(1)
|
||||
# else
|
||||
# pragma pack(push, 1)
|
||||
# endif
|
||||
#endif
|
||||
|
||||
typedef struct _U16_S { U16 v; } _PACKED U16_S;
|
||||
typedef struct _U32_S { U32 v; } _PACKED U32_S;
|
||||
typedef struct _U64_S { U64 v; } _PACKED U64_S;
|
||||
|
||||
#if !defined(LZ4_FORCE_UNALIGNED_ACCESS) && !defined(__GNUC__)
|
||||
# pragma pack(pop)
|
||||
#endif
|
||||
|
||||
#define A64(x) (((U64_S *)(x))->v)
|
||||
#define A32(x) (((U32_S *)(x))->v)
|
||||
#define A16(x) (((U16_S *)(x))->v)
|
||||
|
||||
|
||||
/**************************************
|
||||
Constants
|
||||
**************************************/
|
||||
#define MINMATCH 4
|
||||
|
||||
#define DICTIONARY_LOGSIZE 16
|
||||
#define MAXD (1<<DICTIONARY_LOGSIZE)
|
||||
#define MAXD_MASK ((U32)(MAXD - 1))
|
||||
#define MAX_DISTANCE (MAXD - 1)
|
||||
|
||||
#define HASH_LOG (DICTIONARY_LOGSIZE-1)
|
||||
#define HASHTABLESIZE (1 << HASH_LOG)
|
||||
#define HASH_MASK (HASHTABLESIZE - 1)
|
||||
|
||||
#define ML_BITS 4
|
||||
#define ML_MASK (size_t)((1U<<ML_BITS)-1)
|
||||
#define RUN_BITS (8-ML_BITS)
|
||||
#define RUN_MASK ((1U<<RUN_BITS)-1)
|
||||
|
||||
#define COPYLENGTH 8
|
||||
#define LASTLITERALS 5
|
||||
#define MFLIMIT (COPYLENGTH+MINMATCH)
|
||||
#define MINLENGTH (MFLIMIT+1)
|
||||
#define OPTIMAL_ML (int)((ML_MASK-1)+MINMATCH)
|
||||
|
||||
#define KB *(1U<<10)
|
||||
#define MB *(1U<<20)
|
||||
#define GB *(1U<<30)
|
||||
|
||||
|
||||
/**************************************
|
||||
Architecture-specific macros
|
||||
**************************************/
|
||||
#if LZ4_ARCH64 /* 64-bit */
|
||||
# define STEPSIZE 8
|
||||
# define LZ4_COPYSTEP(s,d) A64(d) = A64(s); d+=8; s+=8;
|
||||
# define LZ4_COPYPACKET(s,d) LZ4_COPYSTEP(s,d)
|
||||
# define AARCH A64
|
||||
# define HTYPE U32
|
||||
# define INITBASE(b,s) const BYTE* const b = s
|
||||
#else /* 32-bit */
|
||||
# define STEPSIZE 4
|
||||
# define LZ4_COPYSTEP(s,d) A32(d) = A32(s); d+=4; s+=4;
|
||||
# define LZ4_COPYPACKET(s,d) LZ4_COPYSTEP(s,d); LZ4_COPYSTEP(s,d);
|
||||
# define AARCH A32
|
||||
# define HTYPE U32
|
||||
# define INITBASE(b,s) const BYTE* const b = s
|
||||
#endif
|
||||
|
||||
#if defined(LZ4_BIG_ENDIAN)
|
||||
# define LZ4_READ_LITTLEENDIAN_16(d,s,p) { U16 v = A16(p); v = lz4_bswap16(v); d = (s) - v; }
|
||||
# define LZ4_WRITE_LITTLEENDIAN_16(p,i) { U16 v = (U16)(i); v = lz4_bswap16(v); A16(p) = v; p+=2; }
|
||||
#else /* Little Endian */
|
||||
# define LZ4_READ_LITTLEENDIAN_16(d,s,p) { d = (s) - A16(p); }
|
||||
# define LZ4_WRITE_LITTLEENDIAN_16(p,v) { A16(p) = v; p+=2; }
|
||||
#endif
|
||||
|
||||
|
||||
/**************************************
|
||||
Local Types
|
||||
**************************************/
|
||||
typedef struct
|
||||
{
|
||||
const BYTE* inputBuffer;
|
||||
const BYTE* base;
|
||||
const BYTE* end;
|
||||
HTYPE hashTable[HASHTABLESIZE];
|
||||
U16 chainTable[MAXD];
|
||||
const BYTE* nextToUpdate;
|
||||
} LZ4HC_Data_Structure;
|
||||
|
||||
|
||||
/**************************************
|
||||
Macros
|
||||
**************************************/
|
||||
#define LZ4_WILDCOPY(s,d,e) do { LZ4_COPYPACKET(s,d) } while (d<e);
|
||||
#define LZ4_BLINDCOPY(s,d,l) { BYTE* e=d+l; LZ4_WILDCOPY(s,d,e); d=e; }
|
||||
#define HASH_FUNCTION(i) (((i) * 2654435761U) >> ((MINMATCH*8)-HASH_LOG))
|
||||
#define HASH_VALUE(p) HASH_FUNCTION(A32(p))
|
||||
#define HASH_POINTER(p) (HashTable[HASH_VALUE(p)] + base)
|
||||
#define DELTANEXT(p) chainTable[(size_t)(p) & MAXD_MASK]
|
||||
#define GETNEXT(p) ((p) - (size_t)DELTANEXT(p))
|
||||
|
||||
|
||||
/**************************************
|
||||
Private functions
|
||||
**************************************/
|
||||
#if LZ4_ARCH64
|
||||
|
||||
FORCE_INLINE int LZ4_NbCommonBytes (register U64 val)
|
||||
{
|
||||
#if defined(LZ4_BIG_ENDIAN)
|
||||
# if defined(_MSC_VER) && !defined(LZ4_FORCE_SW_BITCOUNT)
|
||||
unsigned long r = 0;
|
||||
_BitScanReverse64( &r, val );
|
||||
return (int)(r>>3);
|
||||
# elif defined(__GNUC__) && ((__GNUC__ * 100 + __GNUC_MINOR__) >= 304) && !defined(LZ4_FORCE_SW_BITCOUNT)
|
||||
return (__builtin_clzll(val) >> 3);
|
||||
# else
|
||||
int r;
|
||||
if (!(val>>32)) { r=4; } else { r=0; val>>=32; }
|
||||
if (!(val>>16)) { r+=2; val>>=8; } else { val>>=24; }
|
||||
r += (!val);
|
||||
return r;
|
||||
# endif
|
||||
#else
|
||||
# if defined(_MSC_VER) && !defined(LZ4_FORCE_SW_BITCOUNT)
|
||||
unsigned long r = 0;
|
||||
_BitScanForward64( &r, val );
|
||||
return (int)(r>>3);
|
||||
# elif defined(__GNUC__) && ((__GNUC__ * 100 + __GNUC_MINOR__) >= 304) && !defined(LZ4_FORCE_SW_BITCOUNT)
|
||||
return (__builtin_ctzll(val) >> 3);
|
||||
# else
|
||||
static const int DeBruijnBytePos[64] = { 0, 0, 0, 0, 0, 1, 1, 2, 0, 3, 1, 3, 1, 4, 2, 7, 0, 2, 3, 6, 1, 5, 3, 5, 1, 3, 4, 4, 2, 5, 6, 7, 7, 0, 1, 2, 3, 3, 4, 6, 2, 6, 5, 5, 3, 4, 5, 6, 7, 1, 2, 4, 6, 4, 4, 5, 7, 2, 6, 5, 7, 6, 7, 7 };
|
||||
return DeBruijnBytePos[((U64)((val & -val) * 0x0218A392CDABBD3F)) >> 58];
|
||||
# endif
|
||||
#endif
|
||||
}
|
||||
|
||||
#else
|
||||
|
||||
FORCE_INLINE int LZ4_NbCommonBytes (register U32 val)
|
||||
{
|
||||
#if defined(LZ4_BIG_ENDIAN)
|
||||
# if defined(_MSC_VER) && !defined(LZ4_FORCE_SW_BITCOUNT)
|
||||
unsigned long r;
|
||||
_BitScanReverse( &r, val );
|
||||
return (int)(r>>3);
|
||||
# elif defined(__GNUC__) && ((__GNUC__ * 100 + __GNUC_MINOR__) >= 304) && !defined(LZ4_FORCE_SW_BITCOUNT)
|
||||
return (__builtin_clz(val) >> 3);
|
||||
# else
|
||||
int r;
|
||||
if (!(val>>16)) { r=2; val>>=8; } else { r=0; val>>=24; }
|
||||
r += (!val);
|
||||
return r;
|
||||
# endif
|
||||
#else
|
||||
# if defined(_MSC_VER) && !defined(LZ4_FORCE_SW_BITCOUNT)
|
||||
unsigned long r;
|
||||
_BitScanForward( &r, val );
|
||||
return (int)(r>>3);
|
||||
# elif defined(__GNUC__) && ((__GNUC__ * 100 + __GNUC_MINOR__) >= 304) && !defined(LZ4_FORCE_SW_BITCOUNT)
|
||||
return (__builtin_ctz(val) >> 3);
|
||||
# else
|
||||
static const int DeBruijnBytePos[32] = { 0, 0, 3, 0, 3, 1, 3, 0, 3, 2, 2, 1, 3, 2, 0, 1, 3, 3, 1, 2, 2, 2, 2, 0, 3, 1, 2, 0, 1, 0, 1, 1 };
|
||||
return DeBruijnBytePos[((U32)((val & -(S32)val) * 0x077CB531U)) >> 27];
|
||||
# endif
|
||||
#endif
|
||||
}
|
||||
|
||||
#endif
|
||||
|
||||
|
||||
int LZ4_sizeofStreamStateHC()
|
||||
{
|
||||
return sizeof(LZ4HC_Data_Structure);
|
||||
}
|
||||
|
||||
FORCE_INLINE void LZ4_initHC (LZ4HC_Data_Structure* hc4, const BYTE* base)
|
||||
{
|
||||
MEM_INIT((void*)hc4->hashTable, 0, sizeof(hc4->hashTable));
|
||||
MEM_INIT(hc4->chainTable, 0xFF, sizeof(hc4->chainTable));
|
||||
hc4->nextToUpdate = base + 1;
|
||||
hc4->base = base;
|
||||
hc4->inputBuffer = base;
|
||||
hc4->end = base;
|
||||
}
|
||||
|
||||
int LZ4_resetStreamStateHC(void* state, const char* inputBuffer)
|
||||
{
|
||||
if ((((size_t)state) & (sizeof(void*)-1)) != 0) return 1; /* Error : pointer is not aligned for pointer (32 or 64 bits) */
|
||||
LZ4_initHC((LZ4HC_Data_Structure*)state, (const BYTE*)inputBuffer);
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
void* LZ4_createHC (const char* inputBuffer)
|
||||
{
|
||||
void* hc4 = ALLOCATOR(sizeof(LZ4HC_Data_Structure));
|
||||
LZ4_initHC ((LZ4HC_Data_Structure*)hc4, (const BYTE*)inputBuffer);
|
||||
return hc4;
|
||||
}
|
||||
|
||||
|
||||
int LZ4_freeHC (void* LZ4HC_Data)
|
||||
{
|
||||
FREEMEM(LZ4HC_Data);
|
||||
return (0);
|
||||
}
|
||||
|
||||
|
||||
/* Update chains up to ip (excluded) */
|
||||
FORCE_INLINE void LZ4HC_Insert (LZ4HC_Data_Structure* hc4, const BYTE* ip)
|
||||
{
|
||||
U16* chainTable = hc4->chainTable;
|
||||
HTYPE* HashTable = hc4->hashTable;
|
||||
INITBASE(base,hc4->base);
|
||||
|
||||
while(hc4->nextToUpdate < ip)
|
||||
{
|
||||
const BYTE* const p = hc4->nextToUpdate;
|
||||
size_t delta = (p) - HASH_POINTER(p);
|
||||
if (delta>MAX_DISTANCE) delta = MAX_DISTANCE;
|
||||
DELTANEXT(p) = (U16)delta;
|
||||
HashTable[HASH_VALUE(p)] = (HTYPE)((p) - base);
|
||||
hc4->nextToUpdate++;
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
char* LZ4_slideInputBufferHC(void* LZ4HC_Data)
|
||||
{
|
||||
LZ4HC_Data_Structure* hc4 = (LZ4HC_Data_Structure*)LZ4HC_Data;
|
||||
size_t distance = (hc4->end - 64 KB) - hc4->inputBuffer;
|
||||
|
||||
if (hc4->end <= hc4->inputBuffer + 64 KB) return (char*)(hc4->end); /* no update : less than 64KB within buffer */
|
||||
|
||||
distance = (distance >> 16) << 16; /* Must be a multiple of 64 KB */
|
||||
LZ4HC_Insert(hc4, hc4->end - MINMATCH);
|
||||
memcpy((void*)(hc4->end - 64 KB - distance), (const void*)(hc4->end - 64 KB), 64 KB);
|
||||
hc4->nextToUpdate -= distance;
|
||||
hc4->base -= distance;
|
||||
if ((U32)(hc4->inputBuffer - hc4->base) > 1 GB + 64 KB) /* Avoid overflow */
|
||||
{
|
||||
int i;
|
||||
hc4->base += 1 GB;
|
||||
for (i=0; i<HASHTABLESIZE; i++) hc4->hashTable[i] -= 1 GB;
|
||||
}
|
||||
hc4->end -= distance;
|
||||
return (char*)(hc4->end);
|
||||
}
|
||||
|
||||
|
||||
FORCE_INLINE size_t LZ4HC_CommonLength (const BYTE* p1, const BYTE* p2, const BYTE* const matchlimit)
|
||||
{
|
||||
const BYTE* p1t = p1;
|
||||
|
||||
while (p1t<matchlimit-(STEPSIZE-1))
|
||||
{
|
||||
size_t diff = AARCH(p2) ^ AARCH(p1t);
|
||||
if (!diff) { p1t+=STEPSIZE; p2+=STEPSIZE; continue; }
|
||||
p1t += LZ4_NbCommonBytes(diff);
|
||||
return (p1t - p1);
|
||||
}
|
||||
if (LZ4_ARCH64) if ((p1t<(matchlimit-3)) && (A32(p2) == A32(p1t))) { p1t+=4; p2+=4; }
|
||||
if ((p1t<(matchlimit-1)) && (A16(p2) == A16(p1t))) { p1t+=2; p2+=2; }
|
||||
if ((p1t<matchlimit) && (*p2 == *p1t)) p1t++;
|
||||
return (p1t - p1);
|
||||
}
|
||||
|
||||
|
||||
FORCE_INLINE int LZ4HC_InsertAndFindBestMatch (LZ4HC_Data_Structure* hc4, const BYTE* ip, const BYTE* const matchlimit, const BYTE** matchpos, const int maxNbAttempts)
|
||||
{
|
||||
U16* const chainTable = hc4->chainTable;
|
||||
HTYPE* const HashTable = hc4->hashTable;
|
||||
const BYTE* ref;
|
||||
INITBASE(base,hc4->base);
|
||||
int nbAttempts=maxNbAttempts;
|
||||
size_t repl=0, ml=0;
|
||||
U16 delta=0; /* useless assignment, to remove an uninitialization warning */
|
||||
|
||||
/* HC4 match finder */
|
||||
LZ4HC_Insert(hc4, ip);
|
||||
ref = HASH_POINTER(ip);
|
||||
|
||||
#define REPEAT_OPTIMIZATION
|
||||
#ifdef REPEAT_OPTIMIZATION
|
||||
/* Detect repetitive sequences of length <= 4 */
|
||||
if ((U32)(ip-ref) <= 4) /* potential repetition */
|
||||
{
|
||||
if (A32(ref) == A32(ip)) /* confirmed */
|
||||
{
|
||||
delta = (U16)(ip-ref);
|
||||
repl = ml = LZ4HC_CommonLength(ip+MINMATCH, ref+MINMATCH, matchlimit) + MINMATCH;
|
||||
*matchpos = ref;
|
||||
}
|
||||
ref = GETNEXT(ref);
|
||||
}
|
||||
#endif
|
||||
|
||||
while (((U32)(ip-ref) <= MAX_DISTANCE) && (nbAttempts))
|
||||
{
|
||||
nbAttempts--;
|
||||
if (*(ref+ml) == *(ip+ml))
|
||||
if (A32(ref) == A32(ip))
|
||||
{
|
||||
size_t mlt = LZ4HC_CommonLength(ip+MINMATCH, ref+MINMATCH, matchlimit) + MINMATCH;
|
||||
if (mlt > ml) { ml = mlt; *matchpos = ref; }
|
||||
}
|
||||
ref = GETNEXT(ref);
|
||||
}
|
||||
|
||||
#ifdef REPEAT_OPTIMIZATION
|
||||
/* Complete table */
|
||||
if (repl)
|
||||
{
|
||||
const BYTE* ptr = ip;
|
||||
const BYTE* end;
|
||||
|
||||
end = ip + repl - (MINMATCH-1);
|
||||
while(ptr < end-delta)
|
||||
{
|
||||
DELTANEXT(ptr) = delta; /* Pre-Load */
|
||||
ptr++;
|
||||
}
|
||||
do
|
||||
{
|
||||
DELTANEXT(ptr) = delta;
|
||||
HashTable[HASH_VALUE(ptr)] = (HTYPE)((ptr) - base); /* Head of chain */
|
||||
ptr++;
|
||||
} while(ptr < end);
|
||||
hc4->nextToUpdate = end;
|
||||
}
|
||||
#endif
|
||||
|
||||
return (int)ml;
|
||||
}
|
||||
|
||||
|
||||
FORCE_INLINE int LZ4HC_InsertAndGetWiderMatch (LZ4HC_Data_Structure* hc4, const BYTE* ip, const BYTE* startLimit, const BYTE* matchlimit, int longest, const BYTE** matchpos, const BYTE** startpos, const int maxNbAttempts)
|
||||
{
|
||||
U16* const chainTable = hc4->chainTable;
|
||||
HTYPE* const HashTable = hc4->hashTable;
|
||||
INITBASE(base,hc4->base);
|
||||
const BYTE* ref;
|
||||
int nbAttempts = maxNbAttempts;
|
||||
int delta = (int)(ip-startLimit);
|
||||
|
||||
/* First Match */
|
||||
LZ4HC_Insert(hc4, ip);
|
||||
ref = HASH_POINTER(ip);
|
||||
|
||||
while (((U32)(ip-ref) <= MAX_DISTANCE) && (nbAttempts))
|
||||
{
|
||||
nbAttempts--;
|
||||
if (*(startLimit + longest) == *(ref - delta + longest))
|
||||
if (A32(ref) == A32(ip))
|
||||
{
|
||||
#if 1
|
||||
const BYTE* reft = ref+MINMATCH;
|
||||
const BYTE* ipt = ip+MINMATCH;
|
||||
const BYTE* startt = ip;
|
||||
|
||||
while (ipt<matchlimit-(STEPSIZE-1))
|
||||
{
|
||||
size_t diff = AARCH(reft) ^ AARCH(ipt);
|
||||
if (!diff) { ipt+=STEPSIZE; reft+=STEPSIZE; continue; }
|
||||
ipt += LZ4_NbCommonBytes(diff);
|
||||
goto _endCount;
|
||||
}
|
||||
if (LZ4_ARCH64) if ((ipt<(matchlimit-3)) && (A32(reft) == A32(ipt))) { ipt+=4; reft+=4; }
|
||||
if ((ipt<(matchlimit-1)) && (A16(reft) == A16(ipt))) { ipt+=2; reft+=2; }
|
||||
if ((ipt<matchlimit) && (*reft == *ipt)) ipt++;
|
||||
_endCount:
|
||||
reft = ref;
|
||||
#else
|
||||
/* Easier for code maintenance, but unfortunately slower too */
|
||||
const BYTE* startt = ip;
|
||||
const BYTE* reft = ref;
|
||||
const BYTE* ipt = ip + MINMATCH + LZ4HC_CommonLength(ip+MINMATCH, ref+MINMATCH, matchlimit);
|
||||
#endif
|
||||
|
||||
while ((startt>startLimit) && (reft > hc4->inputBuffer) && (startt[-1] == reft[-1])) {startt--; reft--;}
|
||||
|
||||
if ((ipt-startt) > longest)
|
||||
{
|
||||
longest = (int)(ipt-startt);
|
||||
*matchpos = reft;
|
||||
*startpos = startt;
|
||||
}
|
||||
}
|
||||
ref = GETNEXT(ref);
|
||||
}
|
||||
|
||||
return longest;
|
||||
}
|
||||
|
||||
|
||||
typedef enum { noLimit = 0, limitedOutput = 1 } limitedOutput_directive;
|
||||
|
||||
FORCE_INLINE int LZ4HC_encodeSequence (
|
||||
const BYTE** ip,
|
||||
BYTE** op,
|
||||
const BYTE** anchor,
|
||||
int matchLength,
|
||||
const BYTE* ref,
|
||||
limitedOutput_directive limitedOutputBuffer,
|
||||
BYTE* oend)
|
||||
{
|
||||
int length;
|
||||
BYTE* token;
|
||||
|
||||
/* Encode Literal length */
|
||||
length = (int)(*ip - *anchor);
|
||||
token = (*op)++;
|
||||
if ((limitedOutputBuffer) && ((*op + length + (2 + 1 + LASTLITERALS) + (length>>8)) > oend)) return 1; /* Check output limit */
|
||||
if (length>=(int)RUN_MASK) { int len; *token=(RUN_MASK<<ML_BITS); len = length-RUN_MASK; for(; len > 254 ; len-=255) *(*op)++ = 255; *(*op)++ = (BYTE)len; }
|
||||
else *token = (BYTE)(length<<ML_BITS);
|
||||
|
||||
/* Copy Literals */
|
||||
LZ4_BLINDCOPY(*anchor, *op, length);
|
||||
|
||||
/* Encode Offset */
|
||||
LZ4_WRITE_LITTLEENDIAN_16(*op,(U16)(*ip-ref));
|
||||
|
||||
/* Encode MatchLength */
|
||||
length = (int)(matchLength-MINMATCH);
|
||||
if ((limitedOutputBuffer) && (*op + (1 + LASTLITERALS) + (length>>8) > oend)) return 1; /* Check output limit */
|
||||
if (length>=(int)ML_MASK) { *token+=ML_MASK; length-=ML_MASK; for(; length > 509 ; length-=510) { *(*op)++ = 255; *(*op)++ = 255; } if (length > 254) { length-=255; *(*op)++ = 255; } *(*op)++ = (BYTE)length; }
|
||||
else *token += (BYTE)(length);
|
||||
|
||||
/* Prepare next loop */
|
||||
*ip += matchLength;
|
||||
*anchor = *ip;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
#define MAX_COMPRESSION_LEVEL 16
|
||||
static int LZ4HC_compress_generic (
|
||||
void* ctxvoid,
|
||||
const char* source,
|
||||
char* dest,
|
||||
int inputSize,
|
||||
int maxOutputSize,
|
||||
int compressionLevel,
|
||||
limitedOutput_directive limit
|
||||
)
|
||||
{
|
||||
LZ4HC_Data_Structure* ctx = (LZ4HC_Data_Structure*) ctxvoid;
|
||||
const BYTE* ip = (const BYTE*) source;
|
||||
const BYTE* anchor = ip;
|
||||
const BYTE* const iend = ip + inputSize;
|
||||
const BYTE* const mflimit = iend - MFLIMIT;
|
||||
const BYTE* const matchlimit = (iend - LASTLITERALS);
|
||||
|
||||
BYTE* op = (BYTE*) dest;
|
||||
BYTE* const oend = op + maxOutputSize;
|
||||
|
||||
const int maxNbAttempts = compressionLevel > MAX_COMPRESSION_LEVEL ? 1 << MAX_COMPRESSION_LEVEL : compressionLevel ? 1<<(compressionLevel-1) : 1<<LZ4HC_DEFAULT_COMPRESSIONLEVEL;
|
||||
int ml, ml2, ml3, ml0;
|
||||
const BYTE* ref=NULL;
|
||||
const BYTE* start2=NULL;
|
||||
const BYTE* ref2=NULL;
|
||||
const BYTE* start3=NULL;
|
||||
const BYTE* ref3=NULL;
|
||||
const BYTE* start0;
|
||||
const BYTE* ref0;
|
||||
|
||||
|
||||
/* Ensure blocks follow each other */
|
||||
if (ip != ctx->end) return 0;
|
||||
ctx->end += inputSize;
|
||||
|
||||
ip++;
|
||||
|
||||
/* Main Loop */
|
||||
while (ip < mflimit)
|
||||
{
|
||||
ml = LZ4HC_InsertAndFindBestMatch (ctx, ip, matchlimit, (&ref), maxNbAttempts);
|
||||
if (!ml) { ip++; continue; }
|
||||
|
||||
/* saved, in case we would skip too much */
|
||||
start0 = ip;
|
||||
ref0 = ref;
|
||||
ml0 = ml;
|
||||
|
||||
_Search2:
|
||||
if (ip+ml < mflimit)
|
||||
ml2 = LZ4HC_InsertAndGetWiderMatch(ctx, ip + ml - 2, ip + 1, matchlimit, ml, &ref2, &start2, maxNbAttempts);
|
||||
else ml2 = ml;
|
||||
|
||||
if (ml2 == ml) /* No better match */
|
||||
{
|
||||
if (LZ4HC_encodeSequence(&ip, &op, &anchor, ml, ref, limit, oend)) return 0;
|
||||
continue;
|
||||
}
|
||||
|
||||
if (start0 < ip)
|
||||
{
|
||||
if (start2 < ip + ml0) /* empirical */
|
||||
{
|
||||
ip = start0;
|
||||
ref = ref0;
|
||||
ml = ml0;
|
||||
}
|
||||
}
|
||||
|
||||
/* Here, start0==ip */
|
||||
if ((start2 - ip) < 3) /* First Match too small : removed */
|
||||
{
|
||||
ml = ml2;
|
||||
ip = start2;
|
||||
ref =ref2;
|
||||
goto _Search2;
|
||||
}
|
||||
|
||||
_Search3:
|
||||
/*
|
||||
* Currently we have :
|
||||
* ml2 > ml1, and
|
||||
* ip1+3 <= ip2 (usually < ip1+ml1)
|
||||
*/
|
||||
if ((start2 - ip) < OPTIMAL_ML)
|
||||
{
|
||||
int correction;
|
||||
int new_ml = ml;
|
||||
if (new_ml > OPTIMAL_ML) new_ml = OPTIMAL_ML;
|
||||
if (ip+new_ml > start2 + ml2 - MINMATCH) new_ml = (int)(start2 - ip) + ml2 - MINMATCH;
|
||||
correction = new_ml - (int)(start2 - ip);
|
||||
if (correction > 0)
|
||||
{
|
||||
start2 += correction;
|
||||
ref2 += correction;
|
||||
ml2 -= correction;
|
||||
}
|
||||
}
|
||||
/* Now, we have start2 = ip+new_ml, with new_ml = min(ml, OPTIMAL_ML=18) */
|
||||
|
||||
if (start2 + ml2 < mflimit)
|
||||
ml3 = LZ4HC_InsertAndGetWiderMatch(ctx, start2 + ml2 - 3, start2, matchlimit, ml2, &ref3, &start3, maxNbAttempts);
|
||||
else ml3 = ml2;
|
||||
|
||||
if (ml3 == ml2) /* No better match : 2 sequences to encode */
|
||||
{
|
||||
/* ip & ref are known; Now for ml */
|
||||
if (start2 < ip+ml) ml = (int)(start2 - ip);
|
||||
/* Now, encode 2 sequences */
|
||||
if (LZ4HC_encodeSequence(&ip, &op, &anchor, ml, ref, limit, oend)) return 0;
|
||||
ip = start2;
|
||||
if (LZ4HC_encodeSequence(&ip, &op, &anchor, ml2, ref2, limit, oend)) return 0;
|
||||
continue;
|
||||
}
|
||||
|
||||
if (start3 < ip+ml+3) /* Not enough space for match 2 : remove it */
|
||||
{
|
||||
if (start3 >= (ip+ml)) /* can write Seq1 immediately ==> Seq2 is removed, so Seq3 becomes Seq1 */
|
||||
{
|
||||
if (start2 < ip+ml)
|
||||
{
|
||||
int correction = (int)(ip+ml - start2);
|
||||
start2 += correction;
|
||||
ref2 += correction;
|
||||
ml2 -= correction;
|
||||
if (ml2 < MINMATCH)
|
||||
{
|
||||
start2 = start3;
|
||||
ref2 = ref3;
|
||||
ml2 = ml3;
|
||||
}
|
||||
}
|
||||
|
||||
if (LZ4HC_encodeSequence(&ip, &op, &anchor, ml, ref, limit, oend)) return 0;
|
||||
ip = start3;
|
||||
ref = ref3;
|
||||
ml = ml3;
|
||||
|
||||
start0 = start2;
|
||||
ref0 = ref2;
|
||||
ml0 = ml2;
|
||||
goto _Search2;
|
||||
}
|
||||
|
||||
start2 = start3;
|
||||
ref2 = ref3;
|
||||
ml2 = ml3;
|
||||
goto _Search3;
|
||||
}
|
||||
|
||||
/*
|
||||
* OK, now we have 3 ascending matches; let's write at least the first one
|
||||
* ip & ref are known; Now for ml
|
||||
*/
|
||||
if (start2 < ip+ml)
|
||||
{
|
||||
if ((start2 - ip) < (int)ML_MASK)
|
||||
{
|
||||
int correction;
|
||||
if (ml > OPTIMAL_ML) ml = OPTIMAL_ML;
|
||||
if (ip + ml > start2 + ml2 - MINMATCH) ml = (int)(start2 - ip) + ml2 - MINMATCH;
|
||||
correction = ml - (int)(start2 - ip);
|
||||
if (correction > 0)
|
||||
{
|
||||
start2 += correction;
|
||||
ref2 += correction;
|
||||
ml2 -= correction;
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
ml = (int)(start2 - ip);
|
||||
}
|
||||
}
|
||||
if (LZ4HC_encodeSequence(&ip, &op, &anchor, ml, ref, limit, oend)) return 0;
|
||||
|
||||
ip = start2;
|
||||
ref = ref2;
|
||||
ml = ml2;
|
||||
|
||||
start2 = start3;
|
||||
ref2 = ref3;
|
||||
ml2 = ml3;
|
||||
|
||||
goto _Search3;
|
||||
|
||||
}
|
||||
|
||||
/* Encode Last Literals */
|
||||
{
|
||||
int lastRun = (int)(iend - anchor);
|
||||
if ((limit) && (((char*)op - dest) + lastRun + 1 + ((lastRun+255-RUN_MASK)/255) > (U32)maxOutputSize)) return 0; /* Check output limit */
|
||||
if (lastRun>=(int)RUN_MASK) { *op++=(RUN_MASK<<ML_BITS); lastRun-=RUN_MASK; for(; lastRun > 254 ; lastRun-=255) *op++ = 255; *op++ = (BYTE) lastRun; }
|
||||
else *op++ = (BYTE)(lastRun<<ML_BITS);
|
||||
memcpy(op, anchor, iend - anchor);
|
||||
op += iend-anchor;
|
||||
}
|
||||
|
||||
/* End */
|
||||
return (int) (((char*)op)-dest);
|
||||
}
|
||||
|
||||
|
||||
int LZ4_compressHC2(const char* source, char* dest, int inputSize, int compressionLevel)
|
||||
{
|
||||
void* ctx = LZ4_createHC(source);
|
||||
int result;
|
||||
if (ctx==NULL) return 0;
|
||||
|
||||
result = LZ4HC_compress_generic (ctx, source, dest, inputSize, 0, compressionLevel, noLimit);
|
||||
|
||||
LZ4_freeHC(ctx);
|
||||
return result;
|
||||
}
|
||||
|
||||
int LZ4_compressHC(const char* source, char* dest, int inputSize) { return LZ4_compressHC2(source, dest, inputSize, 0); }
|
||||
|
||||
int LZ4_compressHC2_limitedOutput(const char* source, char* dest, int inputSize, int maxOutputSize, int compressionLevel)
|
||||
{
|
||||
void* ctx = LZ4_createHC(source);
|
||||
int result;
|
||||
if (ctx==NULL) return 0;
|
||||
|
||||
result = LZ4HC_compress_generic (ctx, source, dest, inputSize, maxOutputSize, compressionLevel, limitedOutput);
|
||||
|
||||
LZ4_freeHC(ctx);
|
||||
return result;
|
||||
}
|
||||
|
||||
int LZ4_compressHC_limitedOutput(const char* source, char* dest, int inputSize, int maxOutputSize)
|
||||
{
|
||||
return LZ4_compressHC2_limitedOutput(source, dest, inputSize, maxOutputSize, 0);
|
||||
}
|
||||
|
||||
|
||||
/*****************************
|
||||
Using external allocation
|
||||
*****************************/
|
||||
int LZ4_sizeofStateHC() { return sizeof(LZ4HC_Data_Structure); }
|
||||
|
||||
|
||||
int LZ4_compressHC2_withStateHC (void* state, const char* source, char* dest, int inputSize, int compressionLevel)
|
||||
{
|
||||
if (((size_t)(state)&(sizeof(void*)-1)) != 0) return 0; /* Error : state is not aligned for pointers (32 or 64 bits) */
|
||||
LZ4_initHC ((LZ4HC_Data_Structure*)state, (const BYTE*)source);
|
||||
return LZ4HC_compress_generic (state, source, dest, inputSize, 0, compressionLevel, noLimit);
|
||||
}
|
||||
|
||||
int LZ4_compressHC_withStateHC (void* state, const char* source, char* dest, int inputSize)
|
||||
{ return LZ4_compressHC2_withStateHC (state, source, dest, inputSize, 0); }
|
||||
|
||||
|
||||
int LZ4_compressHC2_limitedOutput_withStateHC (void* state, const char* source, char* dest, int inputSize, int maxOutputSize, int compressionLevel)
|
||||
{
|
||||
if (((size_t)(state)&(sizeof(void*)-1)) != 0) return 0; /* Error : state is not aligned for pointers (32 or 64 bits) */
|
||||
LZ4_initHC ((LZ4HC_Data_Structure*)state, (const BYTE*)source);
|
||||
return LZ4HC_compress_generic (state, source, dest, inputSize, maxOutputSize, compressionLevel, limitedOutput);
|
||||
}
|
||||
|
||||
int LZ4_compressHC_limitedOutput_withStateHC (void* state, const char* source, char* dest, int inputSize, int maxOutputSize)
|
||||
{ return LZ4_compressHC2_limitedOutput_withStateHC (state, source, dest, inputSize, maxOutputSize, 0); }
|
||||
|
||||
|
||||
/****************************
|
||||
Stream functions
|
||||
****************************/
|
||||
|
||||
int LZ4_compressHC_continue (void* LZ4HC_Data, const char* source, char* dest, int inputSize)
|
||||
{
|
||||
return LZ4HC_compress_generic (LZ4HC_Data, source, dest, inputSize, 0, 0, noLimit);
|
||||
}
|
||||
|
||||
int LZ4_compressHC2_continue (void* LZ4HC_Data, const char* source, char* dest, int inputSize, int compressionLevel)
|
||||
{
|
||||
return LZ4HC_compress_generic (LZ4HC_Data, source, dest, inputSize, 0, compressionLevel, noLimit);
|
||||
}
|
||||
|
||||
int LZ4_compressHC_limitedOutput_continue (void* LZ4HC_Data, const char* source, char* dest, int inputSize, int maxOutputSize)
|
||||
{
|
||||
return LZ4HC_compress_generic (LZ4HC_Data, source, dest, inputSize, maxOutputSize, 0, limitedOutput);
|
||||
}
|
||||
|
||||
int LZ4_compressHC2_limitedOutput_continue (void* LZ4HC_Data, const char* source, char* dest, int inputSize, int maxOutputSize, int compressionLevel)
|
||||
{
|
||||
return LZ4HC_compress_generic (LZ4HC_Data, source, dest, inputSize, maxOutputSize, compressionLevel, limitedOutput);
|
||||
}
|
||||
|
|
@ -1,173 +0,0 @@
|
|||
/*
|
||||
LZ4 HC - High Compression Mode of LZ4
|
||||
Header File
|
||||
Copyright (C) 2011-2014, Yann Collet.
|
||||
BSD 2-Clause License (http://www.opensource.org/licenses/bsd-license.php)
|
||||
|
||||
Redistribution and use in source and binary forms, with or without
|
||||
modification, are permitted provided that the following conditions are
|
||||
met:
|
||||
|
||||
* Redistributions of source code must retain the above copyright
|
||||
notice, this list of conditions and the following disclaimer.
|
||||
* Redistributions in binary form must reproduce the above
|
||||
copyright notice, this list of conditions and the following disclaimer
|
||||
in the documentation and/or other materials provided with the
|
||||
distribution.
|
||||
|
||||
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
||||
"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
||||
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
|
||||
A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
|
||||
OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
||||
SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
|
||||
LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
||||
DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
||||
THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
||||
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
||||
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
||||
|
||||
You can contact the author at :
|
||||
- LZ4 homepage : http://fastcompression.blogspot.com/p/lz4.html
|
||||
- LZ4 source repository : http://code.google.com/p/lz4/
|
||||
*/
|
||||
#pragma once
|
||||
|
||||
|
||||
#if defined (__cplusplus)
|
||||
extern "C" {
|
||||
#endif
|
||||
|
||||
|
||||
int LZ4_compressHC (const char* source, char* dest, int inputSize);
|
||||
/*
|
||||
LZ4_compressHC :
|
||||
return : the number of bytes in compressed buffer dest
|
||||
or 0 if compression fails.
|
||||
note : destination buffer must be already allocated.
|
||||
To avoid any problem, size it to handle worst cases situations (input data not compressible)
|
||||
Worst case size evaluation is provided by function LZ4_compressBound() (see "lz4.h")
|
||||
*/
|
||||
|
||||
int LZ4_compressHC_limitedOutput (const char* source, char* dest, int inputSize, int maxOutputSize);
|
||||
/*
|
||||
LZ4_compress_limitedOutput() :
|
||||
Compress 'inputSize' bytes from 'source' into an output buffer 'dest' of maximum size 'maxOutputSize'.
|
||||
If it cannot achieve it, compression will stop, and result of the function will be zero.
|
||||
This function never writes outside of provided output buffer.
|
||||
|
||||
inputSize : Max supported value is 1 GB
|
||||
maxOutputSize : is maximum allowed size into the destination buffer (which must be already allocated)
|
||||
return : the number of output bytes written in buffer 'dest'
|
||||
or 0 if compression fails.
|
||||
*/
|
||||
|
||||
|
||||
int LZ4_compressHC2 (const char* source, char* dest, int inputSize, int compressionLevel);
|
||||
int LZ4_compressHC2_limitedOutput (const char* source, char* dest, int inputSize, int maxOutputSize, int compressionLevel);
|
||||
/*
|
||||
Same functions as above, but with programmable 'compressionLevel'.
|
||||
Recommended values are between 4 and 9, although any value between 0 and 16 will work.
|
||||
'compressionLevel'==0 means use default 'compressionLevel' value.
|
||||
Values above 16 behave the same as 16.
|
||||
Equivalent variants exist for all other compression functions below.
|
||||
*/
|
||||
|
||||
/* Note :
|
||||
Decompression functions are provided within LZ4 source code (see "lz4.h") (BSD license)
|
||||
*/
|
||||
|
||||
|
||||
/**************************************
|
||||
Using an external allocation
|
||||
**************************************/
|
||||
int LZ4_sizeofStateHC(void);
|
||||
int LZ4_compressHC_withStateHC (void* state, const char* source, char* dest, int inputSize);
|
||||
int LZ4_compressHC_limitedOutput_withStateHC (void* state, const char* source, char* dest, int inputSize, int maxOutputSize);
|
||||
|
||||
int LZ4_compressHC2_withStateHC (void* state, const char* source, char* dest, int inputSize, int compressionLevel);
|
||||
int LZ4_compressHC2_limitedOutput_withStateHC(void* state, const char* source, char* dest, int inputSize, int maxOutputSize, int compressionLevel);
|
||||
|
||||
/*
|
||||
These functions are provided should you prefer to allocate memory for compression tables with your own allocation methods.
|
||||
To know how much memory must be allocated for the compression tables, use :
|
||||
int LZ4_sizeofStateHC();
|
||||
|
||||
Note that tables must be aligned for pointer (32 or 64 bits), otherwise compression will fail (return code 0).
|
||||
|
||||
The allocated memory can be provided to the compressions functions using 'void* state' parameter.
|
||||
LZ4_compress_withStateHC() and LZ4_compress_limitedOutput_withStateHC() are equivalent to previously described functions.
|
||||
They just use the externally allocated memory area instead of allocating their own (on stack, or on heap).
|
||||
*/
|
||||
|
||||
|
||||
/**************************************
|
||||
Streaming Functions
|
||||
**************************************/
|
||||
/* Note : these streaming functions still follows the older model */
|
||||
void* LZ4_createHC (const char* inputBuffer);
|
||||
int LZ4_compressHC_continue (void* LZ4HC_Data, const char* source, char* dest, int inputSize);
|
||||
int LZ4_compressHC_limitedOutput_continue (void* LZ4HC_Data, const char* source, char* dest, int inputSize, int maxOutputSize);
|
||||
char* LZ4_slideInputBufferHC (void* LZ4HC_Data);
|
||||
int LZ4_freeHC (void* LZ4HC_Data);
|
||||
|
||||
int LZ4_compressHC2_continue (void* LZ4HC_Data, const char* source, char* dest, int inputSize, int compressionLevel);
|
||||
int LZ4_compressHC2_limitedOutput_continue (void* LZ4HC_Data, const char* source, char* dest, int inputSize, int maxOutputSize, int compressionLevel);
|
||||
|
||||
/*
|
||||
These functions allow the compression of dependent blocks, where each block benefits from prior 64 KB within preceding blocks.
|
||||
In order to achieve this, it is necessary to start creating the LZ4HC Data Structure, thanks to the function :
|
||||
|
||||
void* LZ4_createHC (const char* inputBuffer);
|
||||
The result of the function is the (void*) pointer on the LZ4HC Data Structure.
|
||||
This pointer will be needed in all other functions.
|
||||
If the pointer returned is NULL, then the allocation has failed, and compression must be aborted.
|
||||
The only parameter 'const char* inputBuffer' must, obviously, point at the beginning of input buffer.
|
||||
The input buffer must be already allocated, and size at least 192KB.
|
||||
'inputBuffer' will also be the 'const char* source' of the first block.
|
||||
|
||||
All blocks are expected to lay next to each other within the input buffer, starting from 'inputBuffer'.
|
||||
To compress each block, use either LZ4_compressHC_continue() or LZ4_compressHC_limitedOutput_continue().
|
||||
Their behavior are identical to LZ4_compressHC() or LZ4_compressHC_limitedOutput(),
|
||||
but require the LZ4HC Data Structure as their first argument, and check that each block starts right after the previous one.
|
||||
If next block does not begin immediately after the previous one, the compression will fail (return 0).
|
||||
|
||||
When it's no longer possible to lay the next block after the previous one (not enough space left into input buffer), a call to :
|
||||
char* LZ4_slideInputBufferHC(void* LZ4HC_Data);
|
||||
must be performed. It will typically copy the latest 64KB of input at the beginning of input buffer.
|
||||
Note that, for this function to work properly, minimum size of an input buffer must be 192KB.
|
||||
==> The memory position where the next input data block must start is provided as the result of the function.
|
||||
|
||||
Compression can then resume, using LZ4_compressHC_continue() or LZ4_compressHC_limitedOutput_continue(), as usual.
|
||||
|
||||
When compression is completed, a call to LZ4_freeHC() will release the memory used by the LZ4HC Data Structure.
|
||||
*/
|
||||
|
||||
int LZ4_sizeofStreamStateHC(void);
|
||||
int LZ4_resetStreamStateHC(void* state, const char* inputBuffer);
|
||||
|
||||
/*
|
||||
These functions achieve the same result as :
|
||||
void* LZ4_createHC (const char* inputBuffer);
|
||||
|
||||
They are provided here to allow the user program to allocate memory using its own routines.
|
||||
|
||||
To know how much space must be allocated, use LZ4_sizeofStreamStateHC();
|
||||
Note also that space must be aligned for pointers (32 or 64 bits).
|
||||
|
||||
Once space is allocated, you must initialize it using : LZ4_resetStreamStateHC(void* state, const char* inputBuffer);
|
||||
void* state is a pointer to the space allocated.
|
||||
It must be aligned for pointers (32 or 64 bits), and be large enough.
|
||||
The parameter 'const char* inputBuffer' must, obviously, point at the beginning of input buffer.
|
||||
The input buffer must be already allocated, and size at least 192KB.
|
||||
'inputBuffer' will also be the 'const char* source' of the first block.
|
||||
|
||||
The same space can be re-used multiple times, just by initializing it each time with LZ4_resetStreamState().
|
||||
return value of LZ4_resetStreamStateHC() must be 0 is OK.
|
||||
Any other value means there was an error (typically, state is not aligned for pointers (32 or 64 bits)).
|
||||
*/
|
||||
|
||||
|
||||
#if defined (__cplusplus)
|
||||
}
|
||||
#endif
|
||||
|
|
@ -473,8 +473,7 @@ public String getName() {
|
|||
private static <T extends Compressor, E extends Decompressor> boolean isAvailable(TesterPair<T, E> pair) {
|
||||
Compressor compressor = pair.compressor;
|
||||
|
||||
if (compressor.getClass().isAssignableFrom(Lz4Compressor.class)
|
||||
&& (NativeCodeLoader.isNativeCodeLoaded()))
|
||||
if (compressor.getClass().isAssignableFrom(Lz4Compressor.class))
|
||||
return true;
|
||||
|
||||
else if (compressor.getClass().isAssignableFrom(BuiltInZlibDeflater.class)
|
||||
|
|
|
|||
|
|
@ -76,7 +76,6 @@
|
|||
import org.apache.hadoop.util.NativeCodeLoader;
|
||||
import org.apache.hadoop.util.ReflectionUtils;
|
||||
import org.junit.After;
|
||||
import org.junit.Assert;
|
||||
import org.junit.Test;
|
||||
import org.slf4j.Logger;
|
||||
import org.slf4j.LoggerFactory;
|
||||
|
|
@ -140,8 +139,6 @@ public void testSnappyCodec() throws IOException {
|
|||
|
||||
@Test
|
||||
public void testLz4Codec() throws IOException {
|
||||
if (NativeCodeLoader.isNativeCodeLoaded()) {
|
||||
if (Lz4Codec.isNativeCodeLoaded()) {
|
||||
conf.setBoolean(
|
||||
CommonConfigurationKeys.IO_COMPRESSION_CODEC_LZ4_USELZ4HC_KEY,
|
||||
false);
|
||||
|
|
@ -152,10 +149,6 @@ public void testLz4Codec() throws IOException {
|
|||
true);
|
||||
codecTest(conf, seed, 0, "org.apache.hadoop.io.compress.Lz4Codec");
|
||||
codecTest(conf, seed, count, "org.apache.hadoop.io.compress.Lz4Codec");
|
||||
} else {
|
||||
Assert.fail("Native hadoop library available but lz4 not");
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
@Test
|
||||
|
|
|
|||
|
|
@ -27,17 +27,20 @@
|
|||
import java.io.IOException;
|
||||
import java.util.Random;
|
||||
|
||||
import org.apache.hadoop.conf.Configuration;
|
||||
import org.apache.hadoop.fs.FileSystem;
|
||||
import org.apache.hadoop.fs.Path;
|
||||
import org.apache.hadoop.io.DataInputBuffer;
|
||||
import org.apache.hadoop.io.DataOutputBuffer;
|
||||
import org.apache.hadoop.io.SequenceFile;
|
||||
import org.apache.hadoop.io.Writable;
|
||||
import org.apache.hadoop.io.compress.BlockCompressorStream;
|
||||
import org.apache.hadoop.io.compress.BlockDecompressorStream;
|
||||
import org.apache.hadoop.io.compress.CompressionInputStream;
|
||||
import org.apache.hadoop.io.compress.CompressionOutputStream;
|
||||
import org.apache.hadoop.io.compress.Lz4Codec;
|
||||
import org.apache.hadoop.io.compress.lz4.Lz4Compressor;
|
||||
import org.apache.hadoop.io.compress.lz4.Lz4Decompressor;
|
||||
import org.apache.hadoop.test.MultithreadedTestUtil;
|
||||
import org.junit.Before;
|
||||
import org.junit.Test;
|
||||
import static org.junit.Assume.*;
|
||||
|
||||
|
|
@ -45,11 +48,6 @@ public class TestLz4CompressorDecompressor {
|
|||
|
||||
private static final Random rnd = new Random(12345l);
|
||||
|
||||
@Before
|
||||
public void before() {
|
||||
assumeTrue(Lz4Codec.isNativeCodeLoaded());
|
||||
}
|
||||
|
||||
//test on NullPointerException in {@code compressor.setInput()}
|
||||
@Test
|
||||
public void testCompressorSetInputNullPointerException() {
|
||||
|
|
@ -330,4 +328,36 @@ public void doWork() throws Exception {
|
|||
|
||||
ctx.waitFor(60000);
|
||||
}
|
||||
|
||||
@Test
|
||||
public void testLz4Compatibility() throws Exception {
|
||||
// The sequence file was created using native Lz4 codec before HADOOP-17292.
|
||||
// After we use lz4-java for lz4 compression, this test makes sure we can
|
||||
// decompress the sequence file correctly.
|
||||
Path filePath = new Path(TestLz4CompressorDecompressor.class
|
||||
.getResource("/lz4/sequencefile").toURI());
|
||||
|
||||
Configuration conf = new Configuration();
|
||||
conf.setInt("io.seqfile.compress.blocksize", 1000);
|
||||
FileSystem fs = FileSystem.get(conf);
|
||||
|
||||
int lines = 2000;
|
||||
|
||||
SequenceFile.Reader reader = new SequenceFile.Reader(fs, filePath, conf);
|
||||
|
||||
Writable key = (Writable)reader.getKeyClass().newInstance();
|
||||
Writable value = (Writable)reader.getValueClass().newInstance();
|
||||
|
||||
int lc = 0;
|
||||
try {
|
||||
while (reader.next(key, value)) {
|
||||
assertEquals("key" + lc, key.toString());
|
||||
assertEquals("value" + lc, value.toString());
|
||||
lc++;
|
||||
}
|
||||
} finally {
|
||||
reader.close();
|
||||
}
|
||||
assertEquals(lines, lc);
|
||||
}
|
||||
}
|
||||
|
|
|
|||
|
|
@ -21,7 +21,6 @@
|
|||
import static org.junit.Assert.*;
|
||||
|
||||
import org.apache.hadoop.crypto.OpensslCipher;
|
||||
import org.apache.hadoop.io.compress.Lz4Codec;
|
||||
import org.apache.hadoop.io.compress.zlib.ZlibFactory;
|
||||
import org.apache.hadoop.util.NativeCodeLoader;
|
||||
import org.slf4j.Logger;
|
||||
|
|
@ -54,7 +53,6 @@ public void testNativeCodeLoaded() {
|
|||
if (NativeCodeLoader.buildSupportsOpenssl()) {
|
||||
assertFalse(OpensslCipher.getLibraryName().isEmpty());
|
||||
}
|
||||
assertFalse(Lz4Codec.getLibraryName().isEmpty());
|
||||
LOG.info("TestNativeCodeLoader: libhadoop.so is loaded.");
|
||||
}
|
||||
}
|
||||
|
|
|
|||
Binary file not shown.
Binary file not shown.
|
|
@ -71,6 +71,11 @@
|
|||
<artifactId>assertj-core</artifactId>
|
||||
<scope>test</scope>
|
||||
</dependency>
|
||||
<dependency>
|
||||
<groupId>org.lz4</groupId>
|
||||
<artifactId>lz4-java</artifactId>
|
||||
<scope>test</scope>
|
||||
</dependency>
|
||||
</dependencies>
|
||||
|
||||
<build>
|
||||
|
|
@ -156,9 +161,9 @@
|
|||
</goals>
|
||||
<configuration>
|
||||
<target>
|
||||
<copy file="${basedir}/../../../hadoop-common-project/hadoop-common/src/main/native/src/org/apache/hadoop/io/compress/lz4/lz4.h"
|
||||
<copy file="${basedir}/src/main/native/lz4/lz4.h"
|
||||
todir="${project.build.directory}/native/" />
|
||||
<copy file="${basedir}/../../../hadoop-common-project/hadoop-common/src/main/native/src/org/apache/hadoop/io/compress/lz4/lz4.c"
|
||||
<copy file="${basedir}/src/main/native/lz4/lz4.c"
|
||||
todir="${project.build.directory}/native/" />
|
||||
<copy todir="${project.build.directory}/native/test/testData"
|
||||
overwrite="true">
|
||||
|
|
|
|||
|
|
@ -145,6 +145,7 @@
|
|||
<netty3.version>3.10.6.Final</netty3.version>
|
||||
<netty4.version>4.1.50.Final</netty4.version>
|
||||
<snappy-java.version>1.1.8.2</snappy-java.version>
|
||||
<lz4-java.version>1.7.1</lz4-java.version>
|
||||
|
||||
<!-- Maven protoc compiler -->
|
||||
<protobuf-maven-plugin.version>0.5.1</protobuf-maven-plugin.version>
|
||||
|
|
@ -1732,6 +1733,11 @@
|
|||
<artifactId>snappy-java</artifactId>
|
||||
<version>${snappy-java.version}</version>
|
||||
</dependency>
|
||||
<dependency>
|
||||
<groupId>org.lz4</groupId>
|
||||
<artifactId>lz4-java</artifactId>
|
||||
<version>${lz4-java.version}</version>
|
||||
</dependency>
|
||||
</dependencies>
|
||||
</dependencyManagement>
|
||||
|
||||
|
|
|
|||
Loading…
Reference in New Issue