diff --git a/Makefile b/Makefile index c4ba514..0821c87 100644 --- a/Makefile +++ b/Makefile @@ -16,19 +16,27 @@ SNAPPY_UNPACKED:=$(TARGET)/snappy-extracted.log CXXFLAGS:=$(CXXFLAGS) -I$(SNAPPY_SRC_DIR) +ifeq ($(OS_NAME),SunOS) + TAR:= gtar +else + TAR:= tar +endif + $(SNAPPY_ARCHIVE): @mkdir -p $(@D) curl -o$@ http://snappy.googlecode.com/files/snappy-$(VERSION).tar.gz $(SNAPPY_UNPACKED): $(SNAPPY_ARCHIVE) - tar xvfz $< -C $(TARGET) + $(TAR) xvfz $< -C $(TARGET) touch $@ jni-header: $(SRC)/org/xerial/snappy/SnappyNative.h - -$(SRC)/org/xerial/snappy/SnappyNative.h: $(SRC)/org/xerial/snappy/SnappyNative.java +$(TARGET)/classes/org/xerial/snappy/SnappyNative.class : $(SRC)/org/xerial/snappy/SnappyNative.java @mkdir -p $(TARGET)/classes + $(JAVAC) -source 1.6 -target 1.6 -d $(TARGET)/classes -sourcepath $(SRC) $< + +$(SRC)/org/xerial/snappy/SnappyNative.h: $(TARGET)/classes/org/xerial/snappy/SnappyNative.class $(JAVAH) -classpath $(TARGET)/classes -o $@ org.xerial.snappy.SnappyNative bytecode: src/main/resources/org/xerial/snappy/SnappyNativeLoader.bytecode @@ -86,16 +94,16 @@ win32: # for cross-compilation on Ubuntu, install the g++-mingw-w64-x86-64 package win64: - $(MAKE) native CROSS_PREFIX=x86_64-w64-mingw32- OS_NAME=Windows OS_ARCH=amd64 + $(MAKE) native CROSS_PREFIX=x86_64-w64-mingw32- OS_NAME=Windows OS_ARCH=x86_64 mac32: - $(MAKE) native OS_NAME=Mac OS_ARCH=i386 + $(MAKE) native OS_NAME=Mac OS_ARCH=x86 linux32: - $(MAKE) native OS_NAME=Linux OS_ARCH=i386 + $(MAKE) native OS_NAME=Linux OS_ARCH=x86 freebsd64: - $(MAKE) native OS_NAME=FreeBSD OS_ARCH=amd64 + $(MAKE) native OS_NAME=FreeBSD OS_ARCH=x86_64 # for cross-compilation on Ubuntu, install the g++-arm-linux-gnueabi package linux-arm: @@ -106,7 +114,7 @@ linux-armhf: $(MAKE) native CROSS_PREFIX=arm-linux-gnueabihf- OS_NAME=Linux OS_ARCH=armhf clean-native-linux32: - $(MAKE) clean-native OS_NAME=Linux OS_ARCH=i386 + $(MAKE) clean-native OS_NAME=Linux OS_ARCH=x86 clean-native-win32: $(MAKE) clean-native OS_NAME=Windows OS_ARCH=x86 diff --git a/Makefile.common b/Makefile.common index 0e022c6..3765692 100755 --- a/Makefile.common +++ b/Makefile.common @@ -33,7 +33,7 @@ endif snappy := snappy-$(VERSION) -jni_md := $(shell find -L "$(JAVA_HOME)" -name jni_md.h) +jni_md := $(shell find -L "$(JAVA_HOME)" -name jni_md.h | head -1) ifneq ($(jni_md),) jni_include := $(shell dirname "$(jni_md)") endif @@ -41,7 +41,7 @@ endif # os=Default is meant to be generic unix/linux -known_os_archs := Linux-i386 Linux-amd64 Linux-arm Linux-armhf Mac-i386 Mac-x86_64 FreeBSD-amd64 Windows-x86 Windows-amd64 +known_os_archs := Linux-x86 Linux-x86_64 Linux-arm Linux-armhf Mac-x86 Mac-x86_64 FreeBSD-x86_64 Windows-x86 Windows-x86_64 SunOS-x86 SunOS-sparc os_arch := $(OS_NAME)-$(OS_ARCH) ifeq (,$(findstring $(strip $(os_arch)),$(known_os_archs))) @@ -58,19 +58,33 @@ Default_LINKFLAGS := -shared -static Default_LIBNAME := libsnappyjava.so Default_SNAPPY_FLAGS := -Linux-i386_CXX := $(CROSS_PREFIX)g++ -Linux-i386_STRIP := $(CROSS_PREFIX)strip -Linux-i386_CXXFLAGS := -include lib/inc_linux/jni_md.h -I$(JAVA_HOME)/include -O2 -fPIC -fvisibility=hidden -m32 -Linux-i386_LINKFLAGS := -shared -static-libgcc -static-libstdc++ -Linux-i386_LIBNAME := libsnappyjava.so -Linux-i386_SNAPPY_FLAGS:= +Linux-x86_CXX := $(CROSS_PREFIX)g++ +Linux-x86_STRIP := $(CROSS_PREFIX)strip +Linux-x86_CXXFLAGS := -include lib/inc_linux/jni_md.h -I$(JAVA_HOME)/include -O2 -fPIC -fvisibility=hidden -m32 +Linux-x86_LINKFLAGS := -shared -static-libgcc -static-libstdc++ +Linux-x86_LIBNAME := libsnappyjava.so +Linux-x86_SNAPPY_FLAGS:= -Linux-amd64_CXX := $(CROSS_PREFIX)g++ -Linux-amd64_STRIP := $(CROSS_PREFIX)strip -Linux-amd64_CXXFLAGS := -include lib/inc_linux/jni_md.h -I$(JAVA_HOME)/include -O2 -fPIC -fvisibility=hidden -m64 -Linux-amd64_LINKFLAGS := -shared -static-libgcc -static-libstdc++ -Linux-amd64_LIBNAME := libsnappyjava.so -Linux-amd64_SNAPPY_FLAGS := +Linux-x86_64_CXX := $(CROSS_PREFIX)g++ +Linux-x86_64_STRIP := $(CROSS_PREFIX)strip +Linux-x86_64_CXXFLAGS := -include lib/inc_linux/jni_md.h -I$(JAVA_HOME)/include -O2 -fPIC -fvisibility=hidden -m64 +Linux-x86_64_LINKFLAGS := -shared -static-libgcc -static-libstdc++ +Linux-x86_64_LIBNAME := libsnappyjava.so +Linux-x86_64_SNAPPY_FLAGS := + +SunOS-x86_CXX := g++ +SunOS-x86_STRIP := strip +SunOS-x86_CXXFLAGS := -include lib/inc_linux/jni_md.h -I$(JAVA_HOME)/include -O2 -fPIC -fvisibility=hidden +SunOS-x86_LINKFLAGS := -shared -static-libgcc -static-libstdc++ +SunOS-x86_LIBNAME := libsnappyjava.so +SunOS-x86_SNAPPY_FLAGS := + +SunOS-sparc_CXX := g++ +SunOS-sparc_STRIP := strip +SunOS-sparc_CXXFLAGS := -include lib/inc_linux/jni_md.h -I$(JAVA_HOME)/include -O2 -fPIC -fvisibility=hidden +SunOS-sparc_LINKFLAGS := -shared -static-libgcc -static-libstdc++ +SunOS-sparc_LIBNAME := libsnappyjava.so +SunOS-sparc_SNAPPY_FLAGS := # '-include lib/inc_linux/jni_md.h' is used to force the use of our version, # which defines JNIEXPORT differently; otherwise, since OpenJDK includes @@ -91,12 +105,12 @@ Linux-armhf_LINKFLAGS := -shared -static-libgcc Linux-armhf_LIBNAME := libsnappyjava.so Linux-armhf_SNAPPY_FLAGS:= -Mac-i386_CXX := g++ -arch $(OS_ARCH) -Mac-i386_STRIP := strip -x -Mac-i386_CXXFLAGS := -Ilib/inc_mac -I$(JAVA_HOME)/include -O2 -fPIC -mmacosx-version-min=10.4 -fvisibility=hidden -Mac-i386_LINKFLAGS := -dynamiclib -static-libgcc -Mac-i386_LIBNAME := libsnappyjava.jnilib -Mac-i386_SNAPPY_FLAGS := +Mac-x86_CXX := g++ -arch i386 +Mac-x86_STRIP := strip -x +Mac-x86_CXXFLAGS := -Ilib/inc_mac -I$(JAVA_HOME)/include -O2 -fPIC -mmacosx-version-min=10.4 -fvisibility=hidden +Mac-x86_LINKFLAGS := -dynamiclib -static-libgcc +Mac-x86_LIBNAME := libsnappyjava.jnilib +Mac-x86_SNAPPY_FLAGS := Mac-x86_64_CXX := g++ -arch $(OS_ARCH) Mac-x86_64_STRIP := strip -x @@ -105,12 +119,12 @@ Mac-x86_64_LINKFLAGS := -dynamiclib -static-libgcc Mac-x86_64_LIBNAME := libsnappyjava.jnilib Mac-x86_64_SNAPPY_FLAGS := -FreeBSD-amd64_CXX := $(CROSS_PREFIX)g++ -FreeBSD-amd64_STRIP := $(CROSS_PREFIX)strip -FreeBSD-amd64_CXXFLAGS := -I$(JAVA_HOME)/include -Ilib/inc_mac -O2 -fPIC -fvisibility=hidden -FreeBSD-amd64_LINKFLAGS := -shared -static-libgcc -FreeBSD-amd64_LIBNAME := libsnappyjava.so -FreeBSD-amd64_SNAPPY_FLAGS := +FreeBSD-x86_64_CXX := $(CROSS_PREFIX)g++ +FreeBSD-x86_64_STRIP := $(CROSS_PREFIX)strip +FreeBSD-x86_64_CXXFLAGS := -I$(JAVA_HOME)/include -Ilib/inc_mac -O2 -fPIC -fvisibility=hidden +FreeBSD-x86_64_LINKFLAGS := -shared -static-libgcc +FreeBSD-x86_64_LIBNAME := libsnappyjava.so +FreeBSD-x86_64_SNAPPY_FLAGS := Windows-x86_CXX := $(CROSS_PREFIX)g++ Windows-x86_STRIP := $(CROSS_PREFIX)strip @@ -119,12 +133,12 @@ Windows-x86_LINKFLAGS := -Wl,--kill-at -shared -static Windows-x86_LIBNAME := snappyjava.dll Windows-x86_SNAPPY_FLAGS := -Windows-amd64_CXX := $(CROSS_PREFIX)g++ -Windows-amd64_STRIP := $(CROSS_PREFIX)strip -Windows-amd64_CXXFLAGS := -Ilib/inc_win -O2 -Windows-amd64_LINKFLAGS := -Wl,--kill-at -shared -static -Windows-amd64_LIBNAME := snappyjava.dll -Windows-amd64_SNAPPY_FLAGS := +Windows-x86_64_CXX := $(CROSS_PREFIX)g++ +Windows-x86_64_STRIP := $(CROSS_PREFIX)strip +Windows-x86_64_CXXFLAGS := -Ilib/inc_win -O2 +Windows-x86_64_LINKFLAGS := -Wl,--kill-at -shared -static +Windows-x86_64_LIBNAME := snappyjava.dll +Windows-x86_64_SNAPPY_FLAGS := CXX := $($(os_arch)_CXX) diff --git a/Milestone.md b/Milestone.md index 4c24fa6..202314a 100644 --- a/Milestone.md +++ b/Milestone.md @@ -2,6 +2,21 @@ * `SnappyIndexer` for parallel compression/decompression * CUI commands (snap/unsnap) +## snappy-java-1.1.0 (17 October 2013) + * Add Snappy framed format support (SnappyFramedInputStream, SnappyFramedOutputStream) + * Add SunOS support + * Dropped OpenBSD support + * OSGi support + +## snappy-java-1.1.0-M4 (20 August 2013) + * New JNI native code loading mechanism, which does not rely on native code injection. + * Add OpenBSD support + * Add Framed format support + * Recovered 32-bit Mac support + * Fixes several issues + * Target to Java6 (Java5 will be no longer supported) + * Add zero-copy compression, decompression and isValidCompressedData for LArray + ## snappy-java-1.1.0-M3 (28 March 2013) * Fix linux amd64 build (embed libstdc++) * Fixes #26 diff --git a/NOTICE b/NOTICE index 639ab66..7f27722 100755 --- a/NOTICE +++ b/NOTICE @@ -1,6 +1,9 @@ This product includes software developed by Google Snappy: http://code.google.com/p/snappy/ (New BSD License) +This product includes software developed by Apache + PureJavaCrc32C from apache-hadoop-common http://hadoop.apache.org/ + (Apache 2.0 license) This library containd statically linked libstdc++. This inclusion is allowed by "GCC RUntime Library Exception" diff --git a/README.md b/README.md index 6974246..1b01c20 100755 --- a/README.md +++ b/README.md @@ -8,6 +8,7 @@ The snappy-java is a Java port of the snappy * Although snappy-java uses JNI, it can be used safely with multiple class loaders (e.g. Tomcat, etc.). * Portable across various operating systems; Snappy-java contains native libraries built for Window/Mac/Linux (64-bit). At runtime, snappy-java loads one of these libraries according to your machine environment (It looks system properties, `os.name` and `os.arch`). * Simple usage. Add the snappy-java-(version).jar file to your classpath. Then call compression/decompression methods in org.xerial.snappy.Snappy. + * [Framing-format support](http://snappy.googlecode.com/svn/trunk/framing_format.txt) (Since 1.1.0-SNAPSHOT version) ## Performance * Snappy's main target is very high-speed compression/decompression with reasonable compression size. So the compression ratio of snappy-java is modest and about the same as `LZF` (ranging 20%-100% according to the dataset). @@ -24,7 +25,7 @@ The snappy-java is a Java port of the snappy ## Download The current stable version is available from here: * Release version: http://code.google.com/p/snappy-java/downloads/list - * [Release plans](https://github.com/xerial/snappy-java/blob/develop/Milestone.md) + * [Release plans](Milestone.md) * Snapshot version (the latest beta version): https://oss.sonatype.org/content/repositories/snapshots/org/xerial/snappy/snappy-java/ If you are a Maven user, see [pom.xml example](#using-with-maven). @@ -53,7 +54,7 @@ In addition, high-level methods (`Snappy.compress(String)`, `Snappy.compress(flo ### Stream-based API Stream-based compressor/decompressor `SnappyOutputStream`/`SnappyInputStream` are also available for reading/writing large data sets. - * [Javadoc API](https://oss.sonatype.org/service/local/repositories/releases/archive/org/xerial/snappy/snappy-java/1.1.0-M3/snappy-java-1.1.0-M3-javadoc.jar/!/index.html) + * [Javadoc API](https://oss.sonatype.org/service/local/repositories/releases/archive/org/xerial/snappy/snappy-java/1.1.0/snappy-java-1.1.0-javadoc.jar/!/index.html) ### Setting classpath If you have snappy-java-(VERSION).jar in the current directory, use `-classpath` option as follows: @@ -90,6 +91,9 @@ See the [installation instruction](https://github.com/xerial/snappy-java/blob/de $ cd snappy-java $ make +When building on Solaris use + + $ gmake A file `target/snappy-java-$(version).jar` is the product additionally containing the native library built for your platform. @@ -125,7 +129,7 @@ If you are using Mac and openjdk7 (or higher), use the following option: ## Miscellaneous Notes ### Using snappy-java with Tomcat 6 (or higher) Web Server -Simply put the snappy-java's jar to WEB-INF/lib folder of your web application. Usual JNI-library specific problem no longer exists since snappy-java version 1.0.3 or higher can be loaded by multiple class loaders in the same JVM by using native code injection to the parent class loader (Issue 21). +Simply put the snappy-java's jar to WEB-INF/lib folder of your web application. Usual JNI-library specific problem no longer exists since snappy-java version 1.0.3 or higher can be loaded by multiple class loaders. ---- Snappy-java is developed by [Taro L. Saito](http://www.xerial.org/leo). Twitter [@taroleo](http://twitter.com/#!/taroleo) diff --git a/lib/org/xerial/snappy/OSInfo.class b/lib/org/xerial/snappy/OSInfo.class index 98d8322..3052227 100755 Binary files a/lib/org/xerial/snappy/OSInfo.class and b/lib/org/xerial/snappy/OSInfo.class differ diff --git a/pom.xml b/pom.xml index 4e962fa..4550119 100755 --- a/pom.xml +++ b/pom.xml @@ -4,7 +4,7 @@ 4.0.0 org.xerial.snappy snappy-java - 1.1.0-M3 + 1.1.0 Snappy for Java snappy-java: A fast compression/decompression library bundle @@ -182,12 +182,15 @@ org.osgi.framework;version="[1.5,2)" lazy - org/xerial/snappy/native/Windows/amd64/snappyjava.dll;selection-filter="(&(osgi.arch=x86_64)(osgi.os=win32))", - org/xerial/snappy/native/Windows/x86/snappyjava.dll;selection-filter="(&(osgi.arch=x86)(osgi.os=win32))", - org/xerial/snappy/native/Mac/x86_64/libsnappyjava.jnilib;selection-filter="(&(osgi.arch=x86_64)(osgi.os=macosx))", - org/xerial/snappy/native/Linux/amd64/libsnappyjava.so;selection-filter="(&(osgi.arch=x86_64)(osgi.os=linux))", - org/xerial/snappy/native/Linux/i386/libsnappyjava.so;selection-filter="(&(osgi.arch=x86)(osgi.os=linux))", - org/xerial/snappy/native/Linux/arm/libsnappyjava.so;selection-filter="(&(osgi.arch=arm)(osgi.os=linux))" + org/xerial/snappy/native/Windows/x86_64/snappyjava.dll;osname=win32;processor=x86-64, + org/xerial/snappy/native/Windows/x86/snappyjava.dll;osname=win32;processor=x86, + org/xerial/snappy/native/Mac/x86/libsnappyjava.jnilib;osname=macosx;processor=x86, + org/xerial/snappy/native/Mac/x86_64/libsnappyjava.jnilib;osname=macosx;processor=x86-64, + org/xerial/snappy/native/Linux/x86_64/libsnappyjava.so;osname=linux;processor=x86-64, + org/xerial/snappy/native/Linux/x86/libsnappyjava.so;osname=linux;processor=x86, + org/xerial/snappy/native/SunOS/x86/libsnappyjava.so;osname=sunos;processor=x86, + org/xerial/snappy/native/SunOS/sparc/libsnappyjava.so;osname=sunos;processor=sparc, + org/xerial/snappy/native/Linux/arm/libsnappyjava.so;osname=linux;processor=arm @@ -214,7 +217,7 @@ - + org.apache.maven.plugins maven-clean-plugin @@ -231,7 +234,7 @@ - + maven-assembly-plugin 2.2.1 @@ -252,7 +255,7 @@ - + @@ -278,30 +281,6 @@ git@github.com:xerial/snappy-java.git - - - - xerial.local - - - xerial.local - Xerial Maven Repository - file:///home/web/maven.xerial.org/repository/artifact - - - xerial.local - Xerial Maven Snapshot Repository - file:///home/web/maven.xerial.org/repository/snapshot - false - - - xerial.local - file:///home/web/maven.xerial.org/repository/site - - - - - junit @@ -332,7 +311,7 @@ jar test - + - + diff --git a/src/main/java/org/xerial/snappy/OSInfo.java b/src/main/java/org/xerial/snappy/OSInfo.java index 4ec6686..6c612b8 100755 --- a/src/main/java/org/xerial/snappy/OSInfo.java +++ b/src/main/java/org/xerial/snappy/OSInfo.java @@ -25,6 +25,8 @@ package org.xerial.snappy; import java.io.IOException; +import java.util.HashMap; +import java.util.Locale; /** * Provides OS name and architecture name. @@ -34,6 +36,48 @@ import java.io.IOException; */ public class OSInfo { + private static HashMap archMapping = new HashMap(); + + public static final String X86 = "x86"; + public static final String X86_64 = "x86_64"; + public static final String IA64_32 = "ia64_32"; + public static final String IA64 = "ia64"; + public static final String PPC = "ppc"; + + static { + // x86 mappings + archMapping.put(X86, X86); + archMapping.put("i386", X86); + archMapping.put("i486", X86); + archMapping.put("i586", X86); + archMapping.put("i686", X86); + archMapping.put("pentium", X86); + + // x86_64 mappings + archMapping.put(X86_64, X86_64); + archMapping.put("amd64", X86_64); + archMapping.put("em64t", X86_64); + archMapping.put("universal", X86_64); // Needed for openjdk7 in Mac + + // Itenium 64-bit mappings + archMapping.put(IA64, IA64); + archMapping.put("ia64w", IA64); + + // Itenium 32-bit mappings, usually an HP-UX construct + archMapping.put(IA64_32, IA64_32); + archMapping.put("ia64n", IA64_32); + + // PowerPC mappings + archMapping.put(PPC, PPC); + archMapping.put("pwoer", PPC); + archMapping.put("powerpc", PPC); + archMapping.put("power_pc", PPC); + archMapping.put("power_rs", PPC); + + // TODO: PowerPC 64bit mappings + } + + public static void main(String[] args) { if (args.length >= 1) { if ("--os".equals(args[0])) { @@ -78,8 +122,10 @@ public class OSInfo // ignored: fall back to "arm" arch (soft-float ABI) } } - else if(getOSName().equals("Mac") && (osArch.equals("universal") || osArch.equals("amd64"))) { - return "x86_64"; // Fix for openjdk7 + else { + String lc = osArch.toLowerCase(Locale.US); + if(archMapping.containsKey(lc)) + return archMapping.get(lc); } return translateArchNameToFolderName(osArch); } diff --git a/src/main/java/org/xerial/snappy/PureJavaCrc32C.java b/src/main/java/org/xerial/snappy/PureJavaCrc32C.java new file mode 100644 index 0000000..fec20eb --- /dev/null +++ b/src/main/java/org/xerial/snappy/PureJavaCrc32C.java @@ -0,0 +1,617 @@ +/** + * 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. + * + * Some portions of this file Copyright (c) 2004-2006 Intel Corportation + * and licensed under the BSD license. + */ +package org.xerial.snappy; + +import java.util.zip.Checksum; + +/** + * A pure-java implementation of the CRC32 checksum that uses + * the CRC32-C polynomial, the same polynomial used by iSCSI + * and implemented on many Intel chipsets supporting SSE4.2. + */ +public class PureJavaCrc32C implements Checksum { + + /** the current CRC value, bit-flipped */ + private int crc; + + /** Create a new PureJavaCrc32 object. */ + public PureJavaCrc32C() { + reset(); + } + + public int getIntegerValue() { + return ~crc; + } + + /** {@inheritDoc} */ + public long getValue() { + long ret = crc; + return (~ret) & 0xffffffffL; + } + + /** {@inheritDoc} */ + public void reset() { + crc = 0xffffffff; + } + + /** {@inheritDoc} */ + public void update(byte[] b, int off, int len) { + int localCrc = crc; + while(len > 7) { + int c0 = b[off++] ^ localCrc; + int c1 = b[off++] ^ (localCrc >>>= 8); + int c2 = b[off++] ^ (localCrc >>>= 8); + int c3 = b[off++] ^ (localCrc >>>= 8); + localCrc = (T8_7[c0 & 0xff] ^ T8_6[c1 & 0xff]) + ^ (T8_5[c2 & 0xff] ^ T8_4[c3 & 0xff]); + + localCrc ^= (T8_3[b[off++] & 0xff] ^ T8_2[b[off++] & 0xff]) + ^ (T8_1[b[off++] & 0xff] ^ T8_0[b[off++] & 0xff]); + + len -= 8; + } + while(len > 0) { + localCrc = (localCrc >>> 8) ^ T8_0[(localCrc ^ b[off++]) & 0xff]; + len--; + } + + // Publish crc out to object + crc = localCrc; + } + + /** {@inheritDoc} */ + final public void update(int b) { + crc = (crc >>> 8) ^ T8_0[(crc ^ b) & 0xff]; + } + + // CRC polynomial tables generated by: + // java -cp build/test/classes/:build/classes/ \ + // org.apache.hadoop.util.TestPureJavaCrc32\$Table 82F63B78 + + static final int[] T8_0 = new int[] { + 0x00000000, 0xF26B8303, 0xE13B70F7, 0x1350F3F4, + 0xC79A971F, 0x35F1141C, 0x26A1E7E8, 0xD4CA64EB, + 0x8AD958CF, 0x78B2DBCC, 0x6BE22838, 0x9989AB3B, + 0x4D43CFD0, 0xBF284CD3, 0xAC78BF27, 0x5E133C24, + 0x105EC76F, 0xE235446C, 0xF165B798, 0x030E349B, + 0xD7C45070, 0x25AFD373, 0x36FF2087, 0xC494A384, + 0x9A879FA0, 0x68EC1CA3, 0x7BBCEF57, 0x89D76C54, + 0x5D1D08BF, 0xAF768BBC, 0xBC267848, 0x4E4DFB4B, + 0x20BD8EDE, 0xD2D60DDD, 0xC186FE29, 0x33ED7D2A, + 0xE72719C1, 0x154C9AC2, 0x061C6936, 0xF477EA35, + 0xAA64D611, 0x580F5512, 0x4B5FA6E6, 0xB93425E5, + 0x6DFE410E, 0x9F95C20D, 0x8CC531F9, 0x7EAEB2FA, + 0x30E349B1, 0xC288CAB2, 0xD1D83946, 0x23B3BA45, + 0xF779DEAE, 0x05125DAD, 0x1642AE59, 0xE4292D5A, + 0xBA3A117E, 0x4851927D, 0x5B016189, 0xA96AE28A, + 0x7DA08661, 0x8FCB0562, 0x9C9BF696, 0x6EF07595, + 0x417B1DBC, 0xB3109EBF, 0xA0406D4B, 0x522BEE48, + 0x86E18AA3, 0x748A09A0, 0x67DAFA54, 0x95B17957, + 0xCBA24573, 0x39C9C670, 0x2A993584, 0xD8F2B687, + 0x0C38D26C, 0xFE53516F, 0xED03A29B, 0x1F682198, + 0x5125DAD3, 0xA34E59D0, 0xB01EAA24, 0x42752927, + 0x96BF4DCC, 0x64D4CECF, 0x77843D3B, 0x85EFBE38, + 0xDBFC821C, 0x2997011F, 0x3AC7F2EB, 0xC8AC71E8, + 0x1C661503, 0xEE0D9600, 0xFD5D65F4, 0x0F36E6F7, + 0x61C69362, 0x93AD1061, 0x80FDE395, 0x72966096, + 0xA65C047D, 0x5437877E, 0x4767748A, 0xB50CF789, + 0xEB1FCBAD, 0x197448AE, 0x0A24BB5A, 0xF84F3859, + 0x2C855CB2, 0xDEEEDFB1, 0xCDBE2C45, 0x3FD5AF46, + 0x7198540D, 0x83F3D70E, 0x90A324FA, 0x62C8A7F9, + 0xB602C312, 0x44694011, 0x5739B3E5, 0xA55230E6, + 0xFB410CC2, 0x092A8FC1, 0x1A7A7C35, 0xE811FF36, + 0x3CDB9BDD, 0xCEB018DE, 0xDDE0EB2A, 0x2F8B6829, + 0x82F63B78, 0x709DB87B, 0x63CD4B8F, 0x91A6C88C, + 0x456CAC67, 0xB7072F64, 0xA457DC90, 0x563C5F93, + 0x082F63B7, 0xFA44E0B4, 0xE9141340, 0x1B7F9043, + 0xCFB5F4A8, 0x3DDE77AB, 0x2E8E845F, 0xDCE5075C, + 0x92A8FC17, 0x60C37F14, 0x73938CE0, 0x81F80FE3, + 0x55326B08, 0xA759E80B, 0xB4091BFF, 0x466298FC, + 0x1871A4D8, 0xEA1A27DB, 0xF94AD42F, 0x0B21572C, + 0xDFEB33C7, 0x2D80B0C4, 0x3ED04330, 0xCCBBC033, + 0xA24BB5A6, 0x502036A5, 0x4370C551, 0xB11B4652, + 0x65D122B9, 0x97BAA1BA, 0x84EA524E, 0x7681D14D, + 0x2892ED69, 0xDAF96E6A, 0xC9A99D9E, 0x3BC21E9D, + 0xEF087A76, 0x1D63F975, 0x0E330A81, 0xFC588982, + 0xB21572C9, 0x407EF1CA, 0x532E023E, 0xA145813D, + 0x758FE5D6, 0x87E466D5, 0x94B49521, 0x66DF1622, + 0x38CC2A06, 0xCAA7A905, 0xD9F75AF1, 0x2B9CD9F2, + 0xFF56BD19, 0x0D3D3E1A, 0x1E6DCDEE, 0xEC064EED, + 0xC38D26C4, 0x31E6A5C7, 0x22B65633, 0xD0DDD530, + 0x0417B1DB, 0xF67C32D8, 0xE52CC12C, 0x1747422F, + 0x49547E0B, 0xBB3FFD08, 0xA86F0EFC, 0x5A048DFF, + 0x8ECEE914, 0x7CA56A17, 0x6FF599E3, 0x9D9E1AE0, + 0xD3D3E1AB, 0x21B862A8, 0x32E8915C, 0xC083125F, + 0x144976B4, 0xE622F5B7, 0xF5720643, 0x07198540, + 0x590AB964, 0xAB613A67, 0xB831C993, 0x4A5A4A90, + 0x9E902E7B, 0x6CFBAD78, 0x7FAB5E8C, 0x8DC0DD8F, + 0xE330A81A, 0x115B2B19, 0x020BD8ED, 0xF0605BEE, + 0x24AA3F05, 0xD6C1BC06, 0xC5914FF2, 0x37FACCF1, + 0x69E9F0D5, 0x9B8273D6, 0x88D28022, 0x7AB90321, + 0xAE7367CA, 0x5C18E4C9, 0x4F48173D, 0xBD23943E, + 0xF36E6F75, 0x0105EC76, 0x12551F82, 0xE03E9C81, + 0x34F4F86A, 0xC69F7B69, 0xD5CF889D, 0x27A40B9E, + 0x79B737BA, 0x8BDCB4B9, 0x988C474D, 0x6AE7C44E, + 0xBE2DA0A5, 0x4C4623A6, 0x5F16D052, 0xAD7D5351 + }; + static final int[] T8_1 = new int[] { + 0x00000000, 0x13A29877, 0x274530EE, 0x34E7A899, + 0x4E8A61DC, 0x5D28F9AB, 0x69CF5132, 0x7A6DC945, + 0x9D14C3B8, 0x8EB65BCF, 0xBA51F356, 0xA9F36B21, + 0xD39EA264, 0xC03C3A13, 0xF4DB928A, 0xE7790AFD, + 0x3FC5F181, 0x2C6769F6, 0x1880C16F, 0x0B225918, + 0x714F905D, 0x62ED082A, 0x560AA0B3, 0x45A838C4, + 0xA2D13239, 0xB173AA4E, 0x859402D7, 0x96369AA0, + 0xEC5B53E5, 0xFFF9CB92, 0xCB1E630B, 0xD8BCFB7C, + 0x7F8BE302, 0x6C297B75, 0x58CED3EC, 0x4B6C4B9B, + 0x310182DE, 0x22A31AA9, 0x1644B230, 0x05E62A47, + 0xE29F20BA, 0xF13DB8CD, 0xC5DA1054, 0xD6788823, + 0xAC154166, 0xBFB7D911, 0x8B507188, 0x98F2E9FF, + 0x404E1283, 0x53EC8AF4, 0x670B226D, 0x74A9BA1A, + 0x0EC4735F, 0x1D66EB28, 0x298143B1, 0x3A23DBC6, + 0xDD5AD13B, 0xCEF8494C, 0xFA1FE1D5, 0xE9BD79A2, + 0x93D0B0E7, 0x80722890, 0xB4958009, 0xA737187E, + 0xFF17C604, 0xECB55E73, 0xD852F6EA, 0xCBF06E9D, + 0xB19DA7D8, 0xA23F3FAF, 0x96D89736, 0x857A0F41, + 0x620305BC, 0x71A19DCB, 0x45463552, 0x56E4AD25, + 0x2C896460, 0x3F2BFC17, 0x0BCC548E, 0x186ECCF9, + 0xC0D23785, 0xD370AFF2, 0xE797076B, 0xF4359F1C, + 0x8E585659, 0x9DFACE2E, 0xA91D66B7, 0xBABFFEC0, + 0x5DC6F43D, 0x4E646C4A, 0x7A83C4D3, 0x69215CA4, + 0x134C95E1, 0x00EE0D96, 0x3409A50F, 0x27AB3D78, + 0x809C2506, 0x933EBD71, 0xA7D915E8, 0xB47B8D9F, + 0xCE1644DA, 0xDDB4DCAD, 0xE9537434, 0xFAF1EC43, + 0x1D88E6BE, 0x0E2A7EC9, 0x3ACDD650, 0x296F4E27, + 0x53028762, 0x40A01F15, 0x7447B78C, 0x67E52FFB, + 0xBF59D487, 0xACFB4CF0, 0x981CE469, 0x8BBE7C1E, + 0xF1D3B55B, 0xE2712D2C, 0xD69685B5, 0xC5341DC2, + 0x224D173F, 0x31EF8F48, 0x050827D1, 0x16AABFA6, + 0x6CC776E3, 0x7F65EE94, 0x4B82460D, 0x5820DE7A, + 0xFBC3FAF9, 0xE861628E, 0xDC86CA17, 0xCF245260, + 0xB5499B25, 0xA6EB0352, 0x920CABCB, 0x81AE33BC, + 0x66D73941, 0x7575A136, 0x419209AF, 0x523091D8, + 0x285D589D, 0x3BFFC0EA, 0x0F186873, 0x1CBAF004, + 0xC4060B78, 0xD7A4930F, 0xE3433B96, 0xF0E1A3E1, + 0x8A8C6AA4, 0x992EF2D3, 0xADC95A4A, 0xBE6BC23D, + 0x5912C8C0, 0x4AB050B7, 0x7E57F82E, 0x6DF56059, + 0x1798A91C, 0x043A316B, 0x30DD99F2, 0x237F0185, + 0x844819FB, 0x97EA818C, 0xA30D2915, 0xB0AFB162, + 0xCAC27827, 0xD960E050, 0xED8748C9, 0xFE25D0BE, + 0x195CDA43, 0x0AFE4234, 0x3E19EAAD, 0x2DBB72DA, + 0x57D6BB9F, 0x447423E8, 0x70938B71, 0x63311306, + 0xBB8DE87A, 0xA82F700D, 0x9CC8D894, 0x8F6A40E3, + 0xF50789A6, 0xE6A511D1, 0xD242B948, 0xC1E0213F, + 0x26992BC2, 0x353BB3B5, 0x01DC1B2C, 0x127E835B, + 0x68134A1E, 0x7BB1D269, 0x4F567AF0, 0x5CF4E287, + 0x04D43CFD, 0x1776A48A, 0x23910C13, 0x30339464, + 0x4A5E5D21, 0x59FCC556, 0x6D1B6DCF, 0x7EB9F5B8, + 0x99C0FF45, 0x8A626732, 0xBE85CFAB, 0xAD2757DC, + 0xD74A9E99, 0xC4E806EE, 0xF00FAE77, 0xE3AD3600, + 0x3B11CD7C, 0x28B3550B, 0x1C54FD92, 0x0FF665E5, + 0x759BACA0, 0x663934D7, 0x52DE9C4E, 0x417C0439, + 0xA6050EC4, 0xB5A796B3, 0x81403E2A, 0x92E2A65D, + 0xE88F6F18, 0xFB2DF76F, 0xCFCA5FF6, 0xDC68C781, + 0x7B5FDFFF, 0x68FD4788, 0x5C1AEF11, 0x4FB87766, + 0x35D5BE23, 0x26772654, 0x12908ECD, 0x013216BA, + 0xE64B1C47, 0xF5E98430, 0xC10E2CA9, 0xD2ACB4DE, + 0xA8C17D9B, 0xBB63E5EC, 0x8F844D75, 0x9C26D502, + 0x449A2E7E, 0x5738B609, 0x63DF1E90, 0x707D86E7, + 0x0A104FA2, 0x19B2D7D5, 0x2D557F4C, 0x3EF7E73B, + 0xD98EEDC6, 0xCA2C75B1, 0xFECBDD28, 0xED69455F, + 0x97048C1A, 0x84A6146D, 0xB041BCF4, 0xA3E32483 + }; + static final int[] T8_2 = new int[] { + 0x00000000, 0xA541927E, 0x4F6F520D, 0xEA2EC073, + 0x9EDEA41A, 0x3B9F3664, 0xD1B1F617, 0x74F06469, + 0x38513EC5, 0x9D10ACBB, 0x773E6CC8, 0xD27FFEB6, + 0xA68F9ADF, 0x03CE08A1, 0xE9E0C8D2, 0x4CA15AAC, + 0x70A27D8A, 0xD5E3EFF4, 0x3FCD2F87, 0x9A8CBDF9, + 0xEE7CD990, 0x4B3D4BEE, 0xA1138B9D, 0x045219E3, + 0x48F3434F, 0xEDB2D131, 0x079C1142, 0xA2DD833C, + 0xD62DE755, 0x736C752B, 0x9942B558, 0x3C032726, + 0xE144FB14, 0x4405696A, 0xAE2BA919, 0x0B6A3B67, + 0x7F9A5F0E, 0xDADBCD70, 0x30F50D03, 0x95B49F7D, + 0xD915C5D1, 0x7C5457AF, 0x967A97DC, 0x333B05A2, + 0x47CB61CB, 0xE28AF3B5, 0x08A433C6, 0xADE5A1B8, + 0x91E6869E, 0x34A714E0, 0xDE89D493, 0x7BC846ED, + 0x0F382284, 0xAA79B0FA, 0x40577089, 0xE516E2F7, + 0xA9B7B85B, 0x0CF62A25, 0xE6D8EA56, 0x43997828, + 0x37691C41, 0x92288E3F, 0x78064E4C, 0xDD47DC32, + 0xC76580D9, 0x622412A7, 0x880AD2D4, 0x2D4B40AA, + 0x59BB24C3, 0xFCFAB6BD, 0x16D476CE, 0xB395E4B0, + 0xFF34BE1C, 0x5A752C62, 0xB05BEC11, 0x151A7E6F, + 0x61EA1A06, 0xC4AB8878, 0x2E85480B, 0x8BC4DA75, + 0xB7C7FD53, 0x12866F2D, 0xF8A8AF5E, 0x5DE93D20, + 0x29195949, 0x8C58CB37, 0x66760B44, 0xC337993A, + 0x8F96C396, 0x2AD751E8, 0xC0F9919B, 0x65B803E5, + 0x1148678C, 0xB409F5F2, 0x5E273581, 0xFB66A7FF, + 0x26217BCD, 0x8360E9B3, 0x694E29C0, 0xCC0FBBBE, + 0xB8FFDFD7, 0x1DBE4DA9, 0xF7908DDA, 0x52D11FA4, + 0x1E704508, 0xBB31D776, 0x511F1705, 0xF45E857B, + 0x80AEE112, 0x25EF736C, 0xCFC1B31F, 0x6A802161, + 0x56830647, 0xF3C29439, 0x19EC544A, 0xBCADC634, + 0xC85DA25D, 0x6D1C3023, 0x8732F050, 0x2273622E, + 0x6ED23882, 0xCB93AAFC, 0x21BD6A8F, 0x84FCF8F1, + 0xF00C9C98, 0x554D0EE6, 0xBF63CE95, 0x1A225CEB, + 0x8B277743, 0x2E66E53D, 0xC448254E, 0x6109B730, + 0x15F9D359, 0xB0B84127, 0x5A968154, 0xFFD7132A, + 0xB3764986, 0x1637DBF8, 0xFC191B8B, 0x595889F5, + 0x2DA8ED9C, 0x88E97FE2, 0x62C7BF91, 0xC7862DEF, + 0xFB850AC9, 0x5EC498B7, 0xB4EA58C4, 0x11ABCABA, + 0x655BAED3, 0xC01A3CAD, 0x2A34FCDE, 0x8F756EA0, + 0xC3D4340C, 0x6695A672, 0x8CBB6601, 0x29FAF47F, + 0x5D0A9016, 0xF84B0268, 0x1265C21B, 0xB7245065, + 0x6A638C57, 0xCF221E29, 0x250CDE5A, 0x804D4C24, + 0xF4BD284D, 0x51FCBA33, 0xBBD27A40, 0x1E93E83E, + 0x5232B292, 0xF77320EC, 0x1D5DE09F, 0xB81C72E1, + 0xCCEC1688, 0x69AD84F6, 0x83834485, 0x26C2D6FB, + 0x1AC1F1DD, 0xBF8063A3, 0x55AEA3D0, 0xF0EF31AE, + 0x841F55C7, 0x215EC7B9, 0xCB7007CA, 0x6E3195B4, + 0x2290CF18, 0x87D15D66, 0x6DFF9D15, 0xC8BE0F6B, + 0xBC4E6B02, 0x190FF97C, 0xF321390F, 0x5660AB71, + 0x4C42F79A, 0xE90365E4, 0x032DA597, 0xA66C37E9, + 0xD29C5380, 0x77DDC1FE, 0x9DF3018D, 0x38B293F3, + 0x7413C95F, 0xD1525B21, 0x3B7C9B52, 0x9E3D092C, + 0xEACD6D45, 0x4F8CFF3B, 0xA5A23F48, 0x00E3AD36, + 0x3CE08A10, 0x99A1186E, 0x738FD81D, 0xD6CE4A63, + 0xA23E2E0A, 0x077FBC74, 0xED517C07, 0x4810EE79, + 0x04B1B4D5, 0xA1F026AB, 0x4BDEE6D8, 0xEE9F74A6, + 0x9A6F10CF, 0x3F2E82B1, 0xD50042C2, 0x7041D0BC, + 0xAD060C8E, 0x08479EF0, 0xE2695E83, 0x4728CCFD, + 0x33D8A894, 0x96993AEA, 0x7CB7FA99, 0xD9F668E7, + 0x9557324B, 0x3016A035, 0xDA386046, 0x7F79F238, + 0x0B899651, 0xAEC8042F, 0x44E6C45C, 0xE1A75622, + 0xDDA47104, 0x78E5E37A, 0x92CB2309, 0x378AB177, + 0x437AD51E, 0xE63B4760, 0x0C158713, 0xA954156D, + 0xE5F54FC1, 0x40B4DDBF, 0xAA9A1DCC, 0x0FDB8FB2, + 0x7B2BEBDB, 0xDE6A79A5, 0x3444B9D6, 0x91052BA8 + }; + static final int[] T8_3 = new int[] { + 0x00000000, 0xDD45AAB8, 0xBF672381, 0x62228939, + 0x7B2231F3, 0xA6679B4B, 0xC4451272, 0x1900B8CA, + 0xF64463E6, 0x2B01C95E, 0x49234067, 0x9466EADF, + 0x8D665215, 0x5023F8AD, 0x32017194, 0xEF44DB2C, + 0xE964B13D, 0x34211B85, 0x560392BC, 0x8B463804, + 0x924680CE, 0x4F032A76, 0x2D21A34F, 0xF06409F7, + 0x1F20D2DB, 0xC2657863, 0xA047F15A, 0x7D025BE2, + 0x6402E328, 0xB9474990, 0xDB65C0A9, 0x06206A11, + 0xD725148B, 0x0A60BE33, 0x6842370A, 0xB5079DB2, + 0xAC072578, 0x71428FC0, 0x136006F9, 0xCE25AC41, + 0x2161776D, 0xFC24DDD5, 0x9E0654EC, 0x4343FE54, + 0x5A43469E, 0x8706EC26, 0xE524651F, 0x3861CFA7, + 0x3E41A5B6, 0xE3040F0E, 0x81268637, 0x5C632C8F, + 0x45639445, 0x98263EFD, 0xFA04B7C4, 0x27411D7C, + 0xC805C650, 0x15406CE8, 0x7762E5D1, 0xAA274F69, + 0xB327F7A3, 0x6E625D1B, 0x0C40D422, 0xD1057E9A, + 0xABA65FE7, 0x76E3F55F, 0x14C17C66, 0xC984D6DE, + 0xD0846E14, 0x0DC1C4AC, 0x6FE34D95, 0xB2A6E72D, + 0x5DE23C01, 0x80A796B9, 0xE2851F80, 0x3FC0B538, + 0x26C00DF2, 0xFB85A74A, 0x99A72E73, 0x44E284CB, + 0x42C2EEDA, 0x9F874462, 0xFDA5CD5B, 0x20E067E3, + 0x39E0DF29, 0xE4A57591, 0x8687FCA8, 0x5BC25610, + 0xB4868D3C, 0x69C32784, 0x0BE1AEBD, 0xD6A40405, + 0xCFA4BCCF, 0x12E11677, 0x70C39F4E, 0xAD8635F6, + 0x7C834B6C, 0xA1C6E1D4, 0xC3E468ED, 0x1EA1C255, + 0x07A17A9F, 0xDAE4D027, 0xB8C6591E, 0x6583F3A6, + 0x8AC7288A, 0x57828232, 0x35A00B0B, 0xE8E5A1B3, + 0xF1E51979, 0x2CA0B3C1, 0x4E823AF8, 0x93C79040, + 0x95E7FA51, 0x48A250E9, 0x2A80D9D0, 0xF7C57368, + 0xEEC5CBA2, 0x3380611A, 0x51A2E823, 0x8CE7429B, + 0x63A399B7, 0xBEE6330F, 0xDCC4BA36, 0x0181108E, + 0x1881A844, 0xC5C402FC, 0xA7E68BC5, 0x7AA3217D, + 0x52A0C93F, 0x8FE56387, 0xEDC7EABE, 0x30824006, + 0x2982F8CC, 0xF4C75274, 0x96E5DB4D, 0x4BA071F5, + 0xA4E4AAD9, 0x79A10061, 0x1B838958, 0xC6C623E0, + 0xDFC69B2A, 0x02833192, 0x60A1B8AB, 0xBDE41213, + 0xBBC47802, 0x6681D2BA, 0x04A35B83, 0xD9E6F13B, + 0xC0E649F1, 0x1DA3E349, 0x7F816A70, 0xA2C4C0C8, + 0x4D801BE4, 0x90C5B15C, 0xF2E73865, 0x2FA292DD, + 0x36A22A17, 0xEBE780AF, 0x89C50996, 0x5480A32E, + 0x8585DDB4, 0x58C0770C, 0x3AE2FE35, 0xE7A7548D, + 0xFEA7EC47, 0x23E246FF, 0x41C0CFC6, 0x9C85657E, + 0x73C1BE52, 0xAE8414EA, 0xCCA69DD3, 0x11E3376B, + 0x08E38FA1, 0xD5A62519, 0xB784AC20, 0x6AC10698, + 0x6CE16C89, 0xB1A4C631, 0xD3864F08, 0x0EC3E5B0, + 0x17C35D7A, 0xCA86F7C2, 0xA8A47EFB, 0x75E1D443, + 0x9AA50F6F, 0x47E0A5D7, 0x25C22CEE, 0xF8878656, + 0xE1873E9C, 0x3CC29424, 0x5EE01D1D, 0x83A5B7A5, + 0xF90696D8, 0x24433C60, 0x4661B559, 0x9B241FE1, + 0x8224A72B, 0x5F610D93, 0x3D4384AA, 0xE0062E12, + 0x0F42F53E, 0xD2075F86, 0xB025D6BF, 0x6D607C07, + 0x7460C4CD, 0xA9256E75, 0xCB07E74C, 0x16424DF4, + 0x106227E5, 0xCD278D5D, 0xAF050464, 0x7240AEDC, + 0x6B401616, 0xB605BCAE, 0xD4273597, 0x09629F2F, + 0xE6264403, 0x3B63EEBB, 0x59416782, 0x8404CD3A, + 0x9D0475F0, 0x4041DF48, 0x22635671, 0xFF26FCC9, + 0x2E238253, 0xF36628EB, 0x9144A1D2, 0x4C010B6A, + 0x5501B3A0, 0x88441918, 0xEA669021, 0x37233A99, + 0xD867E1B5, 0x05224B0D, 0x6700C234, 0xBA45688C, + 0xA345D046, 0x7E007AFE, 0x1C22F3C7, 0xC167597F, + 0xC747336E, 0x1A0299D6, 0x782010EF, 0xA565BA57, + 0xBC65029D, 0x6120A825, 0x0302211C, 0xDE478BA4, + 0x31035088, 0xEC46FA30, 0x8E647309, 0x5321D9B1, + 0x4A21617B, 0x9764CBC3, 0xF54642FA, 0x2803E842 + }; + static final int[] T8_4 = new int[] { + 0x00000000, 0x38116FAC, 0x7022DF58, 0x4833B0F4, + 0xE045BEB0, 0xD854D11C, 0x906761E8, 0xA8760E44, + 0xC5670B91, 0xFD76643D, 0xB545D4C9, 0x8D54BB65, + 0x2522B521, 0x1D33DA8D, 0x55006A79, 0x6D1105D5, + 0x8F2261D3, 0xB7330E7F, 0xFF00BE8B, 0xC711D127, + 0x6F67DF63, 0x5776B0CF, 0x1F45003B, 0x27546F97, + 0x4A456A42, 0x725405EE, 0x3A67B51A, 0x0276DAB6, + 0xAA00D4F2, 0x9211BB5E, 0xDA220BAA, 0xE2336406, + 0x1BA8B557, 0x23B9DAFB, 0x6B8A6A0F, 0x539B05A3, + 0xFBED0BE7, 0xC3FC644B, 0x8BCFD4BF, 0xB3DEBB13, + 0xDECFBEC6, 0xE6DED16A, 0xAEED619E, 0x96FC0E32, + 0x3E8A0076, 0x069B6FDA, 0x4EA8DF2E, 0x76B9B082, + 0x948AD484, 0xAC9BBB28, 0xE4A80BDC, 0xDCB96470, + 0x74CF6A34, 0x4CDE0598, 0x04EDB56C, 0x3CFCDAC0, + 0x51EDDF15, 0x69FCB0B9, 0x21CF004D, 0x19DE6FE1, + 0xB1A861A5, 0x89B90E09, 0xC18ABEFD, 0xF99BD151, + 0x37516AAE, 0x0F400502, 0x4773B5F6, 0x7F62DA5A, + 0xD714D41E, 0xEF05BBB2, 0xA7360B46, 0x9F2764EA, + 0xF236613F, 0xCA270E93, 0x8214BE67, 0xBA05D1CB, + 0x1273DF8F, 0x2A62B023, 0x625100D7, 0x5A406F7B, + 0xB8730B7D, 0x806264D1, 0xC851D425, 0xF040BB89, + 0x5836B5CD, 0x6027DA61, 0x28146A95, 0x10050539, + 0x7D1400EC, 0x45056F40, 0x0D36DFB4, 0x3527B018, + 0x9D51BE5C, 0xA540D1F0, 0xED736104, 0xD5620EA8, + 0x2CF9DFF9, 0x14E8B055, 0x5CDB00A1, 0x64CA6F0D, + 0xCCBC6149, 0xF4AD0EE5, 0xBC9EBE11, 0x848FD1BD, + 0xE99ED468, 0xD18FBBC4, 0x99BC0B30, 0xA1AD649C, + 0x09DB6AD8, 0x31CA0574, 0x79F9B580, 0x41E8DA2C, + 0xA3DBBE2A, 0x9BCAD186, 0xD3F96172, 0xEBE80EDE, + 0x439E009A, 0x7B8F6F36, 0x33BCDFC2, 0x0BADB06E, + 0x66BCB5BB, 0x5EADDA17, 0x169E6AE3, 0x2E8F054F, + 0x86F90B0B, 0xBEE864A7, 0xF6DBD453, 0xCECABBFF, + 0x6EA2D55C, 0x56B3BAF0, 0x1E800A04, 0x269165A8, + 0x8EE76BEC, 0xB6F60440, 0xFEC5B4B4, 0xC6D4DB18, + 0xABC5DECD, 0x93D4B161, 0xDBE70195, 0xE3F66E39, + 0x4B80607D, 0x73910FD1, 0x3BA2BF25, 0x03B3D089, + 0xE180B48F, 0xD991DB23, 0x91A26BD7, 0xA9B3047B, + 0x01C50A3F, 0x39D46593, 0x71E7D567, 0x49F6BACB, + 0x24E7BF1E, 0x1CF6D0B2, 0x54C56046, 0x6CD40FEA, + 0xC4A201AE, 0xFCB36E02, 0xB480DEF6, 0x8C91B15A, + 0x750A600B, 0x4D1B0FA7, 0x0528BF53, 0x3D39D0FF, + 0x954FDEBB, 0xAD5EB117, 0xE56D01E3, 0xDD7C6E4F, + 0xB06D6B9A, 0x887C0436, 0xC04FB4C2, 0xF85EDB6E, + 0x5028D52A, 0x6839BA86, 0x200A0A72, 0x181B65DE, + 0xFA2801D8, 0xC2396E74, 0x8A0ADE80, 0xB21BB12C, + 0x1A6DBF68, 0x227CD0C4, 0x6A4F6030, 0x525E0F9C, + 0x3F4F0A49, 0x075E65E5, 0x4F6DD511, 0x777CBABD, + 0xDF0AB4F9, 0xE71BDB55, 0xAF286BA1, 0x9739040D, + 0x59F3BFF2, 0x61E2D05E, 0x29D160AA, 0x11C00F06, + 0xB9B60142, 0x81A76EEE, 0xC994DE1A, 0xF185B1B6, + 0x9C94B463, 0xA485DBCF, 0xECB66B3B, 0xD4A70497, + 0x7CD10AD3, 0x44C0657F, 0x0CF3D58B, 0x34E2BA27, + 0xD6D1DE21, 0xEEC0B18D, 0xA6F30179, 0x9EE26ED5, + 0x36946091, 0x0E850F3D, 0x46B6BFC9, 0x7EA7D065, + 0x13B6D5B0, 0x2BA7BA1C, 0x63940AE8, 0x5B856544, + 0xF3F36B00, 0xCBE204AC, 0x83D1B458, 0xBBC0DBF4, + 0x425B0AA5, 0x7A4A6509, 0x3279D5FD, 0x0A68BA51, + 0xA21EB415, 0x9A0FDBB9, 0xD23C6B4D, 0xEA2D04E1, + 0x873C0134, 0xBF2D6E98, 0xF71EDE6C, 0xCF0FB1C0, + 0x6779BF84, 0x5F68D028, 0x175B60DC, 0x2F4A0F70, + 0xCD796B76, 0xF56804DA, 0xBD5BB42E, 0x854ADB82, + 0x2D3CD5C6, 0x152DBA6A, 0x5D1E0A9E, 0x650F6532, + 0x081E60E7, 0x300F0F4B, 0x783CBFBF, 0x402DD013, + 0xE85BDE57, 0xD04AB1FB, 0x9879010F, 0xA0686EA3 + }; + static final int[] T8_5 = new int[] { + 0x00000000, 0xEF306B19, 0xDB8CA0C3, 0x34BCCBDA, + 0xB2F53777, 0x5DC55C6E, 0x697997B4, 0x8649FCAD, + 0x6006181F, 0x8F367306, 0xBB8AB8DC, 0x54BAD3C5, + 0xD2F32F68, 0x3DC34471, 0x097F8FAB, 0xE64FE4B2, + 0xC00C303E, 0x2F3C5B27, 0x1B8090FD, 0xF4B0FBE4, + 0x72F90749, 0x9DC96C50, 0xA975A78A, 0x4645CC93, + 0xA00A2821, 0x4F3A4338, 0x7B8688E2, 0x94B6E3FB, + 0x12FF1F56, 0xFDCF744F, 0xC973BF95, 0x2643D48C, + 0x85F4168D, 0x6AC47D94, 0x5E78B64E, 0xB148DD57, + 0x370121FA, 0xD8314AE3, 0xEC8D8139, 0x03BDEA20, + 0xE5F20E92, 0x0AC2658B, 0x3E7EAE51, 0xD14EC548, + 0x570739E5, 0xB83752FC, 0x8C8B9926, 0x63BBF23F, + 0x45F826B3, 0xAAC84DAA, 0x9E748670, 0x7144ED69, + 0xF70D11C4, 0x183D7ADD, 0x2C81B107, 0xC3B1DA1E, + 0x25FE3EAC, 0xCACE55B5, 0xFE729E6F, 0x1142F576, + 0x970B09DB, 0x783B62C2, 0x4C87A918, 0xA3B7C201, + 0x0E045BEB, 0xE13430F2, 0xD588FB28, 0x3AB89031, + 0xBCF16C9C, 0x53C10785, 0x677DCC5F, 0x884DA746, + 0x6E0243F4, 0x813228ED, 0xB58EE337, 0x5ABE882E, + 0xDCF77483, 0x33C71F9A, 0x077BD440, 0xE84BBF59, + 0xCE086BD5, 0x213800CC, 0x1584CB16, 0xFAB4A00F, + 0x7CFD5CA2, 0x93CD37BB, 0xA771FC61, 0x48419778, + 0xAE0E73CA, 0x413E18D3, 0x7582D309, 0x9AB2B810, + 0x1CFB44BD, 0xF3CB2FA4, 0xC777E47E, 0x28478F67, + 0x8BF04D66, 0x64C0267F, 0x507CEDA5, 0xBF4C86BC, + 0x39057A11, 0xD6351108, 0xE289DAD2, 0x0DB9B1CB, + 0xEBF65579, 0x04C63E60, 0x307AF5BA, 0xDF4A9EA3, + 0x5903620E, 0xB6330917, 0x828FC2CD, 0x6DBFA9D4, + 0x4BFC7D58, 0xA4CC1641, 0x9070DD9B, 0x7F40B682, + 0xF9094A2F, 0x16392136, 0x2285EAEC, 0xCDB581F5, + 0x2BFA6547, 0xC4CA0E5E, 0xF076C584, 0x1F46AE9D, + 0x990F5230, 0x763F3929, 0x4283F2F3, 0xADB399EA, + 0x1C08B7D6, 0xF338DCCF, 0xC7841715, 0x28B47C0C, + 0xAEFD80A1, 0x41CDEBB8, 0x75712062, 0x9A414B7B, + 0x7C0EAFC9, 0x933EC4D0, 0xA7820F0A, 0x48B26413, + 0xCEFB98BE, 0x21CBF3A7, 0x1577387D, 0xFA475364, + 0xDC0487E8, 0x3334ECF1, 0x0788272B, 0xE8B84C32, + 0x6EF1B09F, 0x81C1DB86, 0xB57D105C, 0x5A4D7B45, + 0xBC029FF7, 0x5332F4EE, 0x678E3F34, 0x88BE542D, + 0x0EF7A880, 0xE1C7C399, 0xD57B0843, 0x3A4B635A, + 0x99FCA15B, 0x76CCCA42, 0x42700198, 0xAD406A81, + 0x2B09962C, 0xC439FD35, 0xF08536EF, 0x1FB55DF6, + 0xF9FAB944, 0x16CAD25D, 0x22761987, 0xCD46729E, + 0x4B0F8E33, 0xA43FE52A, 0x90832EF0, 0x7FB345E9, + 0x59F09165, 0xB6C0FA7C, 0x827C31A6, 0x6D4C5ABF, + 0xEB05A612, 0x0435CD0B, 0x308906D1, 0xDFB96DC8, + 0x39F6897A, 0xD6C6E263, 0xE27A29B9, 0x0D4A42A0, + 0x8B03BE0D, 0x6433D514, 0x508F1ECE, 0xBFBF75D7, + 0x120CEC3D, 0xFD3C8724, 0xC9804CFE, 0x26B027E7, + 0xA0F9DB4A, 0x4FC9B053, 0x7B757B89, 0x94451090, + 0x720AF422, 0x9D3A9F3B, 0xA98654E1, 0x46B63FF8, + 0xC0FFC355, 0x2FCFA84C, 0x1B736396, 0xF443088F, + 0xD200DC03, 0x3D30B71A, 0x098C7CC0, 0xE6BC17D9, + 0x60F5EB74, 0x8FC5806D, 0xBB794BB7, 0x544920AE, + 0xB206C41C, 0x5D36AF05, 0x698A64DF, 0x86BA0FC6, + 0x00F3F36B, 0xEFC39872, 0xDB7F53A8, 0x344F38B1, + 0x97F8FAB0, 0x78C891A9, 0x4C745A73, 0xA344316A, + 0x250DCDC7, 0xCA3DA6DE, 0xFE816D04, 0x11B1061D, + 0xF7FEE2AF, 0x18CE89B6, 0x2C72426C, 0xC3422975, + 0x450BD5D8, 0xAA3BBEC1, 0x9E87751B, 0x71B71E02, + 0x57F4CA8E, 0xB8C4A197, 0x8C786A4D, 0x63480154, + 0xE501FDF9, 0x0A3196E0, 0x3E8D5D3A, 0xD1BD3623, + 0x37F2D291, 0xD8C2B988, 0xEC7E7252, 0x034E194B, + 0x8507E5E6, 0x6A378EFF, 0x5E8B4525, 0xB1BB2E3C + }; + static final int[] T8_6 = new int[] { + 0x00000000, 0x68032CC8, 0xD0065990, 0xB8057558, + 0xA5E0C5D1, 0xCDE3E919, 0x75E69C41, 0x1DE5B089, + 0x4E2DFD53, 0x262ED19B, 0x9E2BA4C3, 0xF628880B, + 0xEBCD3882, 0x83CE144A, 0x3BCB6112, 0x53C84DDA, + 0x9C5BFAA6, 0xF458D66E, 0x4C5DA336, 0x245E8FFE, + 0x39BB3F77, 0x51B813BF, 0xE9BD66E7, 0x81BE4A2F, + 0xD27607F5, 0xBA752B3D, 0x02705E65, 0x6A7372AD, + 0x7796C224, 0x1F95EEEC, 0xA7909BB4, 0xCF93B77C, + 0x3D5B83BD, 0x5558AF75, 0xED5DDA2D, 0x855EF6E5, + 0x98BB466C, 0xF0B86AA4, 0x48BD1FFC, 0x20BE3334, + 0x73767EEE, 0x1B755226, 0xA370277E, 0xCB730BB6, + 0xD696BB3F, 0xBE9597F7, 0x0690E2AF, 0x6E93CE67, + 0xA100791B, 0xC90355D3, 0x7106208B, 0x19050C43, + 0x04E0BCCA, 0x6CE39002, 0xD4E6E55A, 0xBCE5C992, + 0xEF2D8448, 0x872EA880, 0x3F2BDDD8, 0x5728F110, + 0x4ACD4199, 0x22CE6D51, 0x9ACB1809, 0xF2C834C1, + 0x7AB7077A, 0x12B42BB2, 0xAAB15EEA, 0xC2B27222, + 0xDF57C2AB, 0xB754EE63, 0x0F519B3B, 0x6752B7F3, + 0x349AFA29, 0x5C99D6E1, 0xE49CA3B9, 0x8C9F8F71, + 0x917A3FF8, 0xF9791330, 0x417C6668, 0x297F4AA0, + 0xE6ECFDDC, 0x8EEFD114, 0x36EAA44C, 0x5EE98884, + 0x430C380D, 0x2B0F14C5, 0x930A619D, 0xFB094D55, + 0xA8C1008F, 0xC0C22C47, 0x78C7591F, 0x10C475D7, + 0x0D21C55E, 0x6522E996, 0xDD279CCE, 0xB524B006, + 0x47EC84C7, 0x2FEFA80F, 0x97EADD57, 0xFFE9F19F, + 0xE20C4116, 0x8A0F6DDE, 0x320A1886, 0x5A09344E, + 0x09C17994, 0x61C2555C, 0xD9C72004, 0xB1C40CCC, + 0xAC21BC45, 0xC422908D, 0x7C27E5D5, 0x1424C91D, + 0xDBB77E61, 0xB3B452A9, 0x0BB127F1, 0x63B20B39, + 0x7E57BBB0, 0x16549778, 0xAE51E220, 0xC652CEE8, + 0x959A8332, 0xFD99AFFA, 0x459CDAA2, 0x2D9FF66A, + 0x307A46E3, 0x58796A2B, 0xE07C1F73, 0x887F33BB, + 0xF56E0EF4, 0x9D6D223C, 0x25685764, 0x4D6B7BAC, + 0x508ECB25, 0x388DE7ED, 0x808892B5, 0xE88BBE7D, + 0xBB43F3A7, 0xD340DF6F, 0x6B45AA37, 0x034686FF, + 0x1EA33676, 0x76A01ABE, 0xCEA56FE6, 0xA6A6432E, + 0x6935F452, 0x0136D89A, 0xB933ADC2, 0xD130810A, + 0xCCD53183, 0xA4D61D4B, 0x1CD36813, 0x74D044DB, + 0x27180901, 0x4F1B25C9, 0xF71E5091, 0x9F1D7C59, + 0x82F8CCD0, 0xEAFBE018, 0x52FE9540, 0x3AFDB988, + 0xC8358D49, 0xA036A181, 0x1833D4D9, 0x7030F811, + 0x6DD54898, 0x05D66450, 0xBDD31108, 0xD5D03DC0, + 0x8618701A, 0xEE1B5CD2, 0x561E298A, 0x3E1D0542, + 0x23F8B5CB, 0x4BFB9903, 0xF3FEEC5B, 0x9BFDC093, + 0x546E77EF, 0x3C6D5B27, 0x84682E7F, 0xEC6B02B7, + 0xF18EB23E, 0x998D9EF6, 0x2188EBAE, 0x498BC766, + 0x1A438ABC, 0x7240A674, 0xCA45D32C, 0xA246FFE4, + 0xBFA34F6D, 0xD7A063A5, 0x6FA516FD, 0x07A63A35, + 0x8FD9098E, 0xE7DA2546, 0x5FDF501E, 0x37DC7CD6, + 0x2A39CC5F, 0x423AE097, 0xFA3F95CF, 0x923CB907, + 0xC1F4F4DD, 0xA9F7D815, 0x11F2AD4D, 0x79F18185, + 0x6414310C, 0x0C171DC4, 0xB412689C, 0xDC114454, + 0x1382F328, 0x7B81DFE0, 0xC384AAB8, 0xAB878670, + 0xB66236F9, 0xDE611A31, 0x66646F69, 0x0E6743A1, + 0x5DAF0E7B, 0x35AC22B3, 0x8DA957EB, 0xE5AA7B23, + 0xF84FCBAA, 0x904CE762, 0x2849923A, 0x404ABEF2, + 0xB2828A33, 0xDA81A6FB, 0x6284D3A3, 0x0A87FF6B, + 0x17624FE2, 0x7F61632A, 0xC7641672, 0xAF673ABA, + 0xFCAF7760, 0x94AC5BA8, 0x2CA92EF0, 0x44AA0238, + 0x594FB2B1, 0x314C9E79, 0x8949EB21, 0xE14AC7E9, + 0x2ED97095, 0x46DA5C5D, 0xFEDF2905, 0x96DC05CD, + 0x8B39B544, 0xE33A998C, 0x5B3FECD4, 0x333CC01C, + 0x60F48DC6, 0x08F7A10E, 0xB0F2D456, 0xD8F1F89E, + 0xC5144817, 0xAD1764DF, 0x15121187, 0x7D113D4F + }; + static final int[] T8_7 = new int[] { + 0x00000000, 0x493C7D27, 0x9278FA4E, 0xDB448769, + 0x211D826D, 0x6821FF4A, 0xB3657823, 0xFA590504, + 0x423B04DA, 0x0B0779FD, 0xD043FE94, 0x997F83B3, + 0x632686B7, 0x2A1AFB90, 0xF15E7CF9, 0xB86201DE, + 0x847609B4, 0xCD4A7493, 0x160EF3FA, 0x5F328EDD, + 0xA56B8BD9, 0xEC57F6FE, 0x37137197, 0x7E2F0CB0, + 0xC64D0D6E, 0x8F717049, 0x5435F720, 0x1D098A07, + 0xE7508F03, 0xAE6CF224, 0x7528754D, 0x3C14086A, + 0x0D006599, 0x443C18BE, 0x9F789FD7, 0xD644E2F0, + 0x2C1DE7F4, 0x65219AD3, 0xBE651DBA, 0xF759609D, + 0x4F3B6143, 0x06071C64, 0xDD439B0D, 0x947FE62A, + 0x6E26E32E, 0x271A9E09, 0xFC5E1960, 0xB5626447, + 0x89766C2D, 0xC04A110A, 0x1B0E9663, 0x5232EB44, + 0xA86BEE40, 0xE1579367, 0x3A13140E, 0x732F6929, + 0xCB4D68F7, 0x827115D0, 0x593592B9, 0x1009EF9E, + 0xEA50EA9A, 0xA36C97BD, 0x782810D4, 0x31146DF3, + 0x1A00CB32, 0x533CB615, 0x8878317C, 0xC1444C5B, + 0x3B1D495F, 0x72213478, 0xA965B311, 0xE059CE36, + 0x583BCFE8, 0x1107B2CF, 0xCA4335A6, 0x837F4881, + 0x79264D85, 0x301A30A2, 0xEB5EB7CB, 0xA262CAEC, + 0x9E76C286, 0xD74ABFA1, 0x0C0E38C8, 0x453245EF, + 0xBF6B40EB, 0xF6573DCC, 0x2D13BAA5, 0x642FC782, + 0xDC4DC65C, 0x9571BB7B, 0x4E353C12, 0x07094135, + 0xFD504431, 0xB46C3916, 0x6F28BE7F, 0x2614C358, + 0x1700AEAB, 0x5E3CD38C, 0x857854E5, 0xCC4429C2, + 0x361D2CC6, 0x7F2151E1, 0xA465D688, 0xED59ABAF, + 0x553BAA71, 0x1C07D756, 0xC743503F, 0x8E7F2D18, + 0x7426281C, 0x3D1A553B, 0xE65ED252, 0xAF62AF75, + 0x9376A71F, 0xDA4ADA38, 0x010E5D51, 0x48322076, + 0xB26B2572, 0xFB575855, 0x2013DF3C, 0x692FA21B, + 0xD14DA3C5, 0x9871DEE2, 0x4335598B, 0x0A0924AC, + 0xF05021A8, 0xB96C5C8F, 0x6228DBE6, 0x2B14A6C1, + 0x34019664, 0x7D3DEB43, 0xA6796C2A, 0xEF45110D, + 0x151C1409, 0x5C20692E, 0x8764EE47, 0xCE589360, + 0x763A92BE, 0x3F06EF99, 0xE44268F0, 0xAD7E15D7, + 0x572710D3, 0x1E1B6DF4, 0xC55FEA9D, 0x8C6397BA, + 0xB0779FD0, 0xF94BE2F7, 0x220F659E, 0x6B3318B9, + 0x916A1DBD, 0xD856609A, 0x0312E7F3, 0x4A2E9AD4, + 0xF24C9B0A, 0xBB70E62D, 0x60346144, 0x29081C63, + 0xD3511967, 0x9A6D6440, 0x4129E329, 0x08159E0E, + 0x3901F3FD, 0x703D8EDA, 0xAB7909B3, 0xE2457494, + 0x181C7190, 0x51200CB7, 0x8A648BDE, 0xC358F6F9, + 0x7B3AF727, 0x32068A00, 0xE9420D69, 0xA07E704E, + 0x5A27754A, 0x131B086D, 0xC85F8F04, 0x8163F223, + 0xBD77FA49, 0xF44B876E, 0x2F0F0007, 0x66337D20, + 0x9C6A7824, 0xD5560503, 0x0E12826A, 0x472EFF4D, + 0xFF4CFE93, 0xB67083B4, 0x6D3404DD, 0x240879FA, + 0xDE517CFE, 0x976D01D9, 0x4C2986B0, 0x0515FB97, + 0x2E015D56, 0x673D2071, 0xBC79A718, 0xF545DA3F, + 0x0F1CDF3B, 0x4620A21C, 0x9D642575, 0xD4585852, + 0x6C3A598C, 0x250624AB, 0xFE42A3C2, 0xB77EDEE5, + 0x4D27DBE1, 0x041BA6C6, 0xDF5F21AF, 0x96635C88, + 0xAA7754E2, 0xE34B29C5, 0x380FAEAC, 0x7133D38B, + 0x8B6AD68F, 0xC256ABA8, 0x19122CC1, 0x502E51E6, + 0xE84C5038, 0xA1702D1F, 0x7A34AA76, 0x3308D751, + 0xC951D255, 0x806DAF72, 0x5B29281B, 0x1215553C, + 0x230138CF, 0x6A3D45E8, 0xB179C281, 0xF845BFA6, + 0x021CBAA2, 0x4B20C785, 0x906440EC, 0xD9583DCB, + 0x613A3C15, 0x28064132, 0xF342C65B, 0xBA7EBB7C, + 0x4027BE78, 0x091BC35F, 0xD25F4436, 0x9B633911, + 0xA777317B, 0xEE4B4C5C, 0x350FCB35, 0x7C33B612, + 0x866AB316, 0xCF56CE31, 0x14124958, 0x5D2E347F, + 0xE54C35A1, 0xAC704886, 0x7734CFEF, 0x3E08B2C8, + 0xC451B7CC, 0x8D6DCAEB, 0x56294D82, 0x1F1530A5 + }; +} \ No newline at end of file diff --git a/src/main/java/org/xerial/snappy/Snappy.java b/src/main/java/org/xerial/snappy/Snappy.java index dbc29c8..99a030c 100755 --- a/src/main/java/org/xerial/snappy/Snappy.java +++ b/src/main/java/org/xerial/snappy/Snappy.java @@ -26,7 +26,6 @@ package org.xerial.snappy; import java.io.IOException; import java.io.UnsupportedEncodingException; -import java.lang.ExceptionInInitializerError; import java.net.URL; import java.nio.ByteBuffer; import java.nio.charset.Charset; @@ -35,7 +34,7 @@ import java.util.Properties; /** * Snappy API for data compression/decompression * - * Note: if the native libraries cannot be loaded, then an ExceptionInInitializerError + * Note: if the native libraries cannot be loaded, an ExceptionInInitializerError * will be thrown at first use of this class. * * @author leo @@ -53,9 +52,23 @@ public class Snappy } /** - * An instance of SnappyNativeAPI + * An instance of SnappyNative */ - private static Object impl; + private static SnappyNative impl; + + + /** + * Clean up a temporary file (native lib) generated by snappy-java. + * General users do not need to call this method, since the native library extracted in snappy-java + * is deleted upon JVM termination (vie deleteOnExit()). + * This method is useful when using a J2EE container, which will restart servlet containers multiple times without + * restarting JVM. + */ + public static void cleanUp() { + SnappyLoader.cleanUpExtractedNativeLib(); + SnappyLoader.setApi(null); + } + /** * Copy bytes from source to destination @@ -74,7 +87,7 @@ public class Snappy */ public static void arrayCopy(Object src, int offset, int byteLength, Object dest, int dest_offset) throws IOException { - ((SnappyNativeAPI) impl).arrayCopy(src, offset, byteLength, dest, dest_offset); + impl.arrayCopy(src, offset, byteLength, dest, dest_offset); } /** @@ -135,7 +148,7 @@ public class Snappy // output: compressed int uPos = uncompressed.position(); int uLen = uncompressed.remaining(); - int compressedSize = ((SnappyNativeAPI) impl).rawCompress(uncompressed, uPos, uLen, compressed, + int compressedSize = impl.rawCompress(uncompressed, uPos, uLen, compressed, compressed.position()); // pos limit @@ -284,7 +297,7 @@ public class Snappy public static boolean isValidCompressedBuffer(byte[] input, int offset, int length) throws IOException { if (input == null) throw new NullPointerException("input is null"); - return ((SnappyNativeAPI) impl).isValidCompressedBuffer(input, offset, length); + return impl.isValidCompressedBuffer(input, offset, length); } /** @@ -304,10 +317,21 @@ public class Snappy * factor of four faster than actual decompression. */ public static boolean isValidCompressedBuffer(ByteBuffer compressed) throws IOException { - return ((SnappyNativeAPI) impl).isValidCompressedBuffer(compressed, compressed.position(), + return impl.isValidCompressedBuffer(compressed, compressed.position(), compressed.remaining()); } + /** + * Returns true iff the contents of compressed buffer [offset, + * offset+length) can be uncompressed successfully. Does not return the + * uncompressed data. Takes time proportional to the input length, but is + * usually at least a factor of four faster than actual decompression. + */ + public static boolean isValidCompressedBuffer(long inputAddr, long offset, long length) throws IOException { + return impl.isValidCompressedBuffer(inputAddr, offset, length); + } + + /** * Get the maximum byte size needed for compressing data of the given byte * size. @@ -317,7 +341,7 @@ public class Snappy * @return maximum byte size of the compressed data */ public static int maxCompressedLength(int byteSize) { - return ((SnappyNativeAPI) impl).maxCompressedLength(byteSize); + return impl.maxCompressedLength(byteSize); } /** @@ -329,7 +353,7 @@ public class Snappy * @throws IOException */ public static long rawCompress(long inputAddr, long inputSize, long destAddr) throws IOException { - return ((SnappyNativeAPI) impl).rawCompress(inputAddr, inputSize, destAddr); + return impl.rawCompress(inputAddr, inputSize, destAddr); } /** @@ -341,7 +365,7 @@ public class Snappy * @throws IOException */ public static long rawUncompress(long inputAddr, long inputSize, long destAddr) throws IOException { - return ((SnappyNativeAPI) impl).rawUncompress(inputAddr, inputSize, destAddr); + return impl.rawUncompress(inputAddr, inputSize, destAddr); } @@ -356,7 +380,7 @@ public class Snappy */ public static byte[] rawCompress(Object data, int byteSize) throws IOException { byte[] buf = new byte[Snappy.maxCompressedLength(byteSize)]; - int compressedByteSize = ((SnappyNativeAPI) impl).rawCompress(data, 0, byteSize, buf, 0); + int compressedByteSize = impl.rawCompress(data, 0, byteSize, buf, 0); byte[] result = new byte[compressedByteSize]; System.arraycopy(buf, 0, result, 0, compressedByteSize); return result; @@ -384,7 +408,7 @@ public class Snappy if (input == null || output == null) throw new NullPointerException("input or output is null"); - int compressedSize = ((SnappyNativeAPI) impl) + int compressedSize = impl .rawCompress(input, inputOffset, inputLength, output, outputOffset); return compressedSize; } @@ -417,7 +441,7 @@ public class Snappy throws IOException { if (input == null || output == null) throw new NullPointerException("input or output is null"); - return ((SnappyNativeAPI) impl).rawUncompress(input, inputOffset, inputLength, output, outputOffset); + return impl.rawUncompress(input, inputOffset, inputLength, output, outputOffset); } /** @@ -489,7 +513,7 @@ public class Snappy // pos limit // [ ......UUUUUU.........] - int decompressedSize = ((SnappyNativeAPI) impl).rawUncompress(compressed, cPos, cLen, uncompressed, + int decompressedSize = impl.rawUncompress(compressed, cPos, cLen, uncompressed, uncompressed.position()); uncompressed.limit(uncompressed.position() + decompressedSize); @@ -519,7 +543,7 @@ public class Snappy public static char[] uncompressCharArray(byte[] input, int offset, int length) throws IOException { int uncompressedLength = Snappy.uncompressedLength(input, offset, length); char[] result = new char[uncompressedLength / 2]; - int byteSize = ((SnappyNativeAPI) impl).rawUncompress(input, offset, length, result, 0); + int byteSize = impl.rawUncompress(input, offset, length, result, 0); return result; } @@ -533,7 +557,7 @@ public class Snappy public static double[] uncompressDoubleArray(byte[] input) throws IOException { int uncompressedLength = Snappy.uncompressedLength(input, 0, input.length); double[] result = new double[uncompressedLength / 8]; - int byteSize = ((SnappyNativeAPI) impl).rawUncompress(input, 0, input.length, result, 0); + int byteSize = impl.rawUncompress(input, 0, input.length, result, 0); return result; } @@ -548,7 +572,7 @@ public class Snappy * {@link SnappyErrorCode#PARSING_ERROR} */ public static int uncompressedLength(byte[] input) throws IOException { - return ((SnappyNativeAPI) impl).uncompressedLength(input, 0, input.length); + return impl.uncompressedLength(input, 0, input.length); } /** @@ -567,7 +591,7 @@ public class Snappy if (input == null) throw new NullPointerException("input is null"); - return ((SnappyNativeAPI) impl).uncompressedLength(input, offset, length); + return impl.uncompressedLength(input, offset, length); } /** @@ -587,7 +611,7 @@ public class Snappy if (!compressed.isDirect()) throw new SnappyError(SnappyErrorCode.NOT_A_DIRECT_BUFFER, "input is not a direct buffer"); - return ((SnappyNativeAPI) impl).uncompressedLength(compressed, compressed.position(), compressed.remaining()); + return impl.uncompressedLength(compressed, compressed.position(), compressed.remaining()); } /** @@ -599,7 +623,7 @@ public class Snappy * {@link SnappyErrorCode#PARSING_ERROR} */ public static long uncompressedLength(long inputAddr, long len) throws IOException { - return ((SnappyNativeAPI) impl).uncompressedLength(inputAddr, len); + return impl.uncompressedLength(inputAddr, len); } /** @@ -625,7 +649,7 @@ public class Snappy public static float[] uncompressFloatArray(byte[] input, int offset, int length) throws IOException { int uncompressedLength = Snappy.uncompressedLength(input, offset, length); float[] result = new float[uncompressedLength / 4]; - int byteSize = ((SnappyNativeAPI) impl).rawUncompress(input, offset, length, result, 0); + int byteSize = impl.rawUncompress(input, offset, length, result, 0); return result; } @@ -652,7 +676,7 @@ public class Snappy public static int[] uncompressIntArray(byte[] input, int offset, int length) throws IOException { int uncompressedLength = Snappy.uncompressedLength(input, offset, length); int[] result = new int[uncompressedLength / 4]; - int byteSize = ((SnappyNativeAPI) impl).rawUncompress(input, offset, length, result, 0); + int byteSize = impl.rawUncompress(input, offset, length, result, 0); return result; } @@ -679,7 +703,7 @@ public class Snappy public static long[] uncompressLongArray(byte[] input, int offset, int length) throws IOException { int uncompressedLength = Snappy.uncompressedLength(input, offset, length); long[] result = new long[uncompressedLength / 8]; - int byteSize = ((SnappyNativeAPI) impl).rawUncompress(input, offset, length, result, 0); + int byteSize = impl.rawUncompress(input, offset, length, result, 0); return result; } @@ -706,7 +730,7 @@ public class Snappy public static short[] uncompressShortArray(byte[] input, int offset, int length) throws IOException { int uncompressedLength = Snappy.uncompressedLength(input, offset, length); short[] result = new short[uncompressedLength / 2]; - int byteSize = ((SnappyNativeAPI) impl).rawUncompress(input, offset, length, result, 0); + int byteSize = impl.rawUncompress(input, offset, length, result, 0); return result; } diff --git a/src/main/java/org/xerial/snappy/SnappyBundleActivator.java b/src/main/java/org/xerial/snappy/SnappyBundleActivator.java index f36a4f5..5b0f7a2 100755 --- a/src/main/java/org/xerial/snappy/SnappyBundleActivator.java +++ b/src/main/java/org/xerial/snappy/SnappyBundleActivator.java @@ -24,12 +24,12 @@ //-------------------------------------- package org.xerial.snappy; -import java.util.jar.Manifest; - import org.osgi.framework.Bundle; import org.osgi.framework.BundleActivator; import org.osgi.framework.BundleContext; +import java.util.jar.Manifest; + /** * OSGi bundle entry point * @@ -56,5 +56,6 @@ public class SnappyBundleActivator implements BundleActivator public void stop(BundleContext context) throws Exception { SnappyLoader.setApi(null); + SnappyLoader.cleanUpExtractedNativeLib(); } } diff --git a/src/main/java/org/xerial/snappy/SnappyCodec.java b/src/main/java/org/xerial/snappy/SnappyCodec.java index 18014bd..8358a1c 100755 --- a/src/main/java/org/xerial/snappy/SnappyCodec.java +++ b/src/main/java/org/xerial/snappy/SnappyCodec.java @@ -91,7 +91,7 @@ public class SnappyCodec public static SnappyCodec readHeader(InputStream in) throws IOException { DataInputStream d = new DataInputStream(in); byte[] magic = new byte[MAGIC_LEN]; - d.read(magic, 0, MAGIC_LEN); + d.readFully(magic, 0, MAGIC_LEN); int version = d.readInt(); int compatibleVersion = d.readInt(); return new SnappyCodec(magic, version, compatibleVersion); diff --git a/src/main/java/org/xerial/snappy/SnappyFramed.java b/src/main/java/org/xerial/snappy/SnappyFramed.java new file mode 100644 index 0000000..41fbe8d --- /dev/null +++ b/src/main/java/org/xerial/snappy/SnappyFramed.java @@ -0,0 +1,128 @@ +/* + * Created: Apr 12, 2013 + */ +package org.xerial.snappy; + +import java.io.IOException; +import java.nio.ByteBuffer; +import java.nio.channels.ReadableByteChannel; + +/** + * Constants and utilities for implementing x-snappy-framed. + * + * @author Brett Okken + * @since 1.1.0 + */ +final class SnappyFramed { + public static final int COMPRESSED_DATA_FLAG = 0x00; + + public static final int UNCOMPRESSED_DATA_FLAG = 0x01; + + public static final int STREAM_IDENTIFIER_FLAG = 0xff; + + private static final int MASK_DELTA = 0xa282ead8; + + /** + * The header consists of the stream identifier flag, 3 bytes indicating a + * length of 6, and "sNaPpY" in ASCII. + */ + public static final byte[] HEADER_BYTES = new byte[] { + (byte) STREAM_IDENTIFIER_FLAG, 0x06, 0x00, 0x00, 0x73, 0x4e, 0x61, + 0x50, 0x70, 0x59 }; + + public static int maskedCrc32c(byte[] data) + { + return maskedCrc32c(data, 0, data.length); + } + + public static int maskedCrc32c(byte[] data, int offset, int length) + { + final PureJavaCrc32C crc32c = new PureJavaCrc32C(); + crc32c.update(data, offset, length); + return mask(crc32c.getIntegerValue()); + } + + /** + * Checksums are not stored directly, but masked, as checksumming data and + * then its own checksum can be problematic. The masking is the same as used + * in Apache Hadoop: Rotate the checksum by 15 bits, then add the constant + * 0xa282ead8 (using wraparound as normal for unsigned integers). This is + * equivalent to the following C code: + * + * 
+     * uint32_t mask_checksum(uint32_t x) {
+     *     return ((x >> 15) | (x << 17)) + 0xa282ead8; 
+     * }
+     *
+ */ + public static int mask(int crc) + { + // Rotate right by 15 bits and add a constant. + return ((crc >>> 15) | (crc << 17)) + MASK_DELTA; + } + + + static final int readBytes(ReadableByteChannel source, ByteBuffer dest) throws IOException + { + // tells how many bytes to read. + final int expectedLength = dest.remaining(); + + int totalRead = 0; + + // how many bytes were read. + int lastRead = source.read(dest); + + totalRead = lastRead; + + // if we did not read as many bytes as we had hoped, try reading again. + if (lastRead < expectedLength) + { + // as long the buffer is not full (remaining() == 0) and we have not reached EOF (lastRead == -1) keep reading. + while (dest.remaining() != 0 && lastRead != -1) + { + lastRead = source.read(dest); + + // if we got EOF, do not add to total read. + if (lastRead != -1) + { + totalRead += lastRead; + } + } + } + + if (totalRead > 0) + { + dest.limit(dest.position()); + } + else + { + dest.position(dest.limit()); + } + + return totalRead; + } + + static int skip(final ReadableByteChannel source, final int skip, final ByteBuffer buffer) throws IOException + { + if (skip <= 0) { + return 0; + } + + int toSkip = skip; + int skipped = 0; + while(toSkip > 0 && skipped != -1) { + buffer.clear(); + if (toSkip < buffer.capacity()) { + buffer.limit(toSkip); + } + + skipped = source.read(buffer); + if (skipped > 0) { + toSkip -= skipped; + } + } + + buffer.clear(); + return skip - toSkip; + } +} diff --git a/src/main/java/org/xerial/snappy/SnappyFramedInputStream.java b/src/main/java/org/xerial/snappy/SnappyFramedInputStream.java new file mode 100644 index 0000000..0c02018 --- /dev/null +++ b/src/main/java/org/xerial/snappy/SnappyFramedInputStream.java @@ -0,0 +1,452 @@ +/* + * Created: Apr 15, 2013 + */ +package org.xerial.snappy; + +import static java.lang.Math.min; +import static org.xerial.snappy.SnappyFramed.*; +import static org.xerial.snappy.SnappyFramedOutputStream.*; + +import java.io.EOFException; +import java.io.IOException; +import java.io.InputStream; +import java.nio.ByteBuffer; +import java.nio.channels.Channels; +import java.nio.channels.ClosedChannelException; +import java.nio.channels.ReadableByteChannel; +import java.util.Arrays; + +/** + * Implements the x-snappy-framed as an {@link InputStream} and + * {@link ReadableByteChannel}. + * + * @author Brett Okken + * @since 1.1.0 + */ +public final class SnappyFramedInputStream extends InputStream implements + ReadableByteChannel { + + private final ReadableByteChannel rbc; + private final ByteBuffer frameHeader; + private final boolean verifyChecksums; + + /** + * A single frame read from the underlying {@link InputStream}. + */ + private ByteBuffer input; + + /** + * The decompressed data from {@link #input}. + */ + private ByteBuffer uncompressedDirect; + + /** + * Indicates if this instance has been closed. + */ + private boolean closed; + + /** + * Indicates if we have reached the EOF on {@link #in}. + */ + private boolean eof; + + /** + * The position in {@link buffer} to read to. + */ + private int valid; + + /** + * The next position to read from {@link #buffer}. + */ + private int position; + + /** + * Buffer contains a copy of the uncompressed data for the block. + */ + private byte[] buffer; + + /** + * Creates a Snappy input stream to read data from the specified underlying + * input stream. + * + * @param in + * the underlying input stream. Must not be {@code null}. + */ + public SnappyFramedInputStream(InputStream in) throws IOException { + this(in, true); + } + + /** + * Creates a Snappy input stream to read data from the specified underlying + * input stream. + * + * @param in + * the underlying input stream. Must not be {@code null}. + * @param verifyChecksums + * if true, checksums in input stream will be verified + */ + public SnappyFramedInputStream(InputStream in, boolean verifyChecksums) + throws IOException { + this(Channels.newChannel(in), verifyChecksums); + } + + /** + * Creates a Snappy input stream to read data from the specified underlying + * channel. + * + * @param in + * the underlying readable channel. Must not be {@code null}. + */ + public SnappyFramedInputStream(ReadableByteChannel in) + throws IOException { + this(in, true); + } + + /** + * Creates a Snappy input stream to read data from the specified underlying + * channel. + * + * @param in + * the underlying readable channel. Must not be {@code null}. + * @param verifyChecksums + * if true, checksums in input stream will be verified + */ + public SnappyFramedInputStream(ReadableByteChannel in, + boolean verifyChecksums) throws IOException { + if (in == null) { + throw new NullPointerException("in is null"); + } + + this.rbc = in; + this.verifyChecksums = verifyChecksums; + + allocateBuffersBasedOnSize(MAX_BLOCK_SIZE + 5); + this.frameHeader = ByteBuffer.allocate(4); + + // stream must begin with stream header + final byte[] expectedHeader = HEADER_BYTES; + final byte[] actualHeader = new byte[expectedHeader.length]; + final ByteBuffer actualBuffer = ByteBuffer.wrap(actualHeader); + + // assume that if the input cannot read 4 bytes that something is + // wrong. + final int read = in.read(actualBuffer); + if (read < expectedHeader.length) { + throw new EOFException( + "encountered EOF while reading stream header"); + } + if (!Arrays.equals(expectedHeader, actualHeader)) { + throw new IOException("invalid stream header"); + } + } + + /** + * @param size + */ + private void allocateBuffersBasedOnSize(int size) { + + input = ByteBuffer.allocateDirect(size); + final int maxCompressedLength = Snappy.maxCompressedLength(size); + uncompressedDirect = ByteBuffer.allocateDirect(maxCompressedLength); + buffer = new byte[maxCompressedLength]; + } + + @Override + public int read() throws IOException { + if (closed) { + return -1; + } + if (!ensureBuffer()) { + return -1; + } + return buffer[position++] & 0xFF; + } + + @Override + public int read(byte[] output, int offset, int length) throws IOException { + + if (output == null) { + throw new IllegalArgumentException("output is null"); + } + + if (offset < 0 || length < 0 || offset + length > output.length) { + throw new IllegalArgumentException("invalid offset [" + offset + + "] and length [" + length + ']'); + } + + if (closed) { + throw new ClosedChannelException(); + } + + if (length == 0) { + return 0; + } + if (!ensureBuffer()) { + return -1; + } + + final int size = min(length, available()); + System.arraycopy(buffer, position, output, offset, size); + position += size; + return size; + } + + @Override + public int available() throws IOException { + if (closed) { + return 0; + } + return valid - position; + } + + /** + * {@inheritDoc} + */ + @Override + public boolean isOpen() { + return !closed; + } + + /** + * {@inheritDoc} + */ + @Override + public int read(ByteBuffer dst) throws IOException { + + if (dst == null) { + throw new IllegalArgumentException("dst is null"); + } + + if (closed) { + throw new ClosedChannelException(); + } + + if (dst.remaining() == 0) { + return 0; + } + if (!ensureBuffer()) { + return -1; + } + + final int size = min(dst.remaining(), available()); + dst.put(buffer, position, size); + position += size; + return size; + } + + @Override + public void close() throws IOException { + try { + rbc.close(); + } finally { + if (!closed) { + closed = true; + } + } + } + + static enum FrameAction { + RAW, SKIP, UNCOMPRESS; + } + + public static final class FrameMetaData { + final int length; + final FrameAction frameAction; + + /** + * @param frameAction + * @param length + */ + public FrameMetaData(FrameAction frameAction, int length) { + super(); + this.frameAction = frameAction; + this.length = length; + } + } + + public static final class FrameData { + final int checkSum; + final int offset; + + /** + * @param checkSum + * @param offset + */ + public FrameData(int checkSum, int offset) { + super(); + this.checkSum = checkSum; + this.offset = offset; + } + } + + private boolean ensureBuffer() throws IOException { + if (available() > 0) { + return true; + } + if (eof) { + return false; + } + + if (!readBlockHeader()) { + eof = true; + return false; + } + + // get action based on header + final FrameMetaData frameMetaData = getFrameMetaData(frameHeader); + + if (FrameAction.SKIP == frameMetaData.frameAction) { + SnappyFramed.skip(rbc, frameMetaData.length, + ByteBuffer.wrap(buffer)); + return ensureBuffer(); + } + + if (frameMetaData.length > input.capacity()) { + allocateBuffersBasedOnSize(frameMetaData.length); + } + + input.clear(); + input.limit(frameMetaData.length); + + final int actualRead = readBytes(rbc, input); + if (actualRead != frameMetaData.length) { + throw new EOFException("unexpectd EOF when reading frame"); + } + input.flip(); + + final FrameData frameData = getFrameData(input); + + if (FrameAction.UNCOMPRESS == frameMetaData.frameAction) { + + input.position(frameData.offset); + + final int uncompressedLength = Snappy.uncompressedLength(input); + + if (uncompressedLength > uncompressedDirect.capacity()) { + uncompressedDirect = ByteBuffer + .allocateDirect(uncompressedLength); + buffer = new byte[Math.max(input.capacity(), uncompressedLength)]; + } + + uncompressedDirect.clear(); + + this.valid = Snappy.uncompress(input, uncompressedDirect); + + uncompressedDirect.get(buffer, 0, valid); + this.position = 0; + } else { + // we need to start reading at the offset + input.position(frameData.offset); + this.position = 0; + this.valid = input.remaining(); + this.input.get(buffer, 0, input.remaining()); + } + + if (verifyChecksums) { + final int actualCrc32c = SnappyFramed.maskedCrc32c(buffer, + position, valid - position); + if (frameData.checkSum != actualCrc32c) { + throw new IOException("Corrupt input: invalid checksum"); + } + } + + return true; + } + + private boolean readBlockHeader() throws IOException { + frameHeader.clear(); + int read = readBytes(rbc, frameHeader); + + if (read == -1) { + return false; + } + + if (read < frameHeader.capacity()) { + throw new EOFException("encountered EOF while reading block header"); + } + frameHeader.flip(); + + return true; + } + + /** + * + * @param frameHeader + * @return + * @throws IOException + */ + private FrameMetaData getFrameMetaData(ByteBuffer frameHeader) + throws IOException { + + assert frameHeader.hasArray(); + + final byte[] frameHeaderArray = frameHeader.array(); + + int length = (frameHeaderArray[1] & 0xFF); + length |= (frameHeaderArray[2] & 0xFF) << 8; + length |= (frameHeaderArray[3] & 0xFF) << 16; + + int minLength = 0; + final FrameAction frameAction; + final int flag = frameHeaderArray[0] & 0xFF; + switch (flag) { + case COMPRESSED_DATA_FLAG: + frameAction = FrameAction.UNCOMPRESS; + minLength = 5; + break; + case UNCOMPRESSED_DATA_FLAG: + frameAction = FrameAction.RAW; + minLength = 5; + break; + case STREAM_IDENTIFIER_FLAG: + if (length != 6) { + throw new IOException( + "stream identifier chunk with invalid length: " + + length); + } + frameAction = FrameAction.SKIP; + minLength = 6; + break; + default: + // Reserved unskippable chunks (chunk types 0x02-0x7f) + if (flag <= 0x7f) { + throw new IOException("unsupported unskippable chunk: " + + Integer.toHexString(flag)); + } + + // all that is left is Reserved skippable chunks (chunk types + // 0x80-0xfe) + frameAction = FrameAction.SKIP; + minLength = 0; + } + + if (length < minLength) { + throw new IOException("invalid length: " + length + + " for chunk flag: " + Integer.toHexString(flag)); + } + + return new FrameMetaData(frameAction, length); + } + + /** + * + * @param content + * @return + * @throws IOException + */ + private FrameData getFrameData(ByteBuffer content) throws IOException { + return new FrameData(getCrc32c(content), 4); + } + + private int getCrc32c(ByteBuffer content) { + + final int position = content.position(); + + return ((content.get(position + 3) & 0xFF) << 24) + | ((content.get(position + 2) & 0xFF) << 16) + | ((content.get(position + 1) & 0xFF) << 8) + | (content.get(position) & 0xFF); + } +} diff --git a/src/main/java/org/xerial/snappy/SnappyFramedOutputStream.java b/src/main/java/org/xerial/snappy/SnappyFramedOutputStream.java new file mode 100644 index 0000000..221e242 --- /dev/null +++ b/src/main/java/org/xerial/snappy/SnappyFramedOutputStream.java @@ -0,0 +1,317 @@ +/* + * Created: Apr 12, 2013 + */ +package org.xerial.snappy; + +import static org.xerial.snappy.SnappyFramed.COMPRESSED_DATA_FLAG; +import static org.xerial.snappy.SnappyFramed.HEADER_BYTES; +import static org.xerial.snappy.SnappyFramed.UNCOMPRESSED_DATA_FLAG; +import static org.xerial.snappy.SnappyFramed.maskedCrc32c; + +import java.io.IOException; +import java.io.OutputStream; +import java.nio.ByteBuffer; +import java.nio.channels.ClosedChannelException; +import java.nio.channels.WritableByteChannel; + +/** + * Implements the x-snappy-framed as an {@link OutputStream} and + * {@link WritableByteChannel}. + * + * @author Brett Okken + * @since 1.1.0 + */ +public final class SnappyFramedOutputStream extends OutputStream implements + WritableByteChannel { + + /** + * The x-snappy-framed specification allows for a chunk size up to + * 16,777,211 bytes in length. However, it also goes on to state: + *

+ * + * We place an additional restriction that the uncompressed data in a chunk + * must be no longer than 65536 bytes. This allows consumers to easily use + * small fixed-size buffers. + * + *

+ */ + public static final int MAX_BLOCK_SIZE = 64 * 1024; + + /** + * The default block size to use. + */ + public static final int DEFAULT_BLOCK_SIZE = MAX_BLOCK_SIZE; + + /** + * The default min compression ratio to use. + */ + public static final double DEFAULT_MIN_COMPRESSION_RATIO = 0.85d; + + // private final int blockSize; + private final ByteBuffer buffer; + private final byte[] outputBuffer; + private final double minCompressionRatio; + + private final OutputStream out; + + // private int position; + private boolean closed; + + /** + * Creates a new {@link SnappyFramedOutputStream} using the {@link #DEFAULT_BLOCK_SIZE} + * and {@link #DEFAULT_MIN_COMPRESSION_RATIO}. + * @param out + * The underlying {@link OutputStream} to write to. Must not be + * {@code null}. + * @throws IOException + */ + public SnappyFramedOutputStream(OutputStream out) throws IOException { + this(out, DEFAULT_BLOCK_SIZE, DEFAULT_MIN_COMPRESSION_RATIO); + } + + /** + * Creates a new {@link SnappyFramedOutputStream} instance. + * + * @param out + * The underlying {@link OutputStream} to write to. Must not be + * {@code null}. + * @param blockSize + * The block size (of raw data) to compress before writing frames + * to out. Must be in (0, 65536]. + * @param minCompressionRatio + * Defines the minimum compression ratio ( + * {@code compressedLength / rawLength}) that must be achieved to + * write the compressed data. This must be in (0, 1.0]. + * @throws IOException + */ + public SnappyFramedOutputStream(OutputStream out, int blockSize, + double minCompressionRatio) throws IOException { + if (out == null) { + throw new NullPointerException(); + } + + if (minCompressionRatio <= 0 || minCompressionRatio > 1.0) { + throw new IllegalArgumentException("minCompressionRatio " + + minCompressionRatio + " must be in (0,1.0]"); + } + + if (blockSize <= 0 || blockSize > MAX_BLOCK_SIZE) { + throw new IllegalArgumentException("block size " + blockSize + + " must be in (0, 65536]"); + } + + this.out = out; + this.minCompressionRatio = minCompressionRatio; + buffer = ByteBuffer.allocate(blockSize); + outputBuffer = new byte[Snappy.maxCompressedLength(blockSize)]; + + writeHeader(out); + } + + /** + * Writes the implementation specific header or "marker bytes" to + * out. + * + * @param out + * The underlying {@link OutputStream}. + * @throws IOException + */ + private void writeHeader(OutputStream out) throws IOException { + out.write(HEADER_BYTES); + } + + /** + * {@inheritDoc} + */ + @Override + public boolean isOpen() { + return !closed; + } + + @Override + public void write(int b) throws IOException { + if (closed) { + throw new IOException("Stream is closed"); + } + if (buffer.remaining() <= 0) { + flushBuffer(); + } + buffer.put((byte) b); + } + + @Override + public void write(byte[] input, int offset, int length) throws IOException { + if (closed) { + throw new IOException("Stream is closed"); + } + + write(ByteBuffer.wrap(input, offset, length)); + } + + /** + * {@inheritDoc} + */ + @Override + public int write(ByteBuffer src) throws IOException { + if (closed) { + throw new ClosedChannelException(); + } + + if (buffer.remaining() <= 0) { + flushBuffer(); + } + + final int srcLength = src.remaining(); + + // easy case: enough free space in buffer for entire input + if (buffer.remaining() >= src.remaining()) { + buffer.put(src); + return srcLength; + } + + // store current limit + final int srcEnd = src.position() + src.remaining(); + + while ((src.position() + buffer.remaining()) <= srcEnd) { + // fill partial buffer as much as possible and flush + src.limit(src.position() + buffer.remaining()); + buffer.put(src); + flushBuffer(); + } + + // reset original limit + src.limit(srcEnd); + + // copy remaining partial block into now-empty buffer + buffer.put(src); + + return srcLength; + } + + @Override + public final void flush() throws IOException { + if (closed) { + throw new IOException("Stream is closed"); + } + flushBuffer(); + out.flush(); + } + + @Override + public final void close() throws IOException { + if (closed) { + return; + } + try { + flush(); + out.close(); + } finally { + closed = true; + } + } + + /** + * Compresses and writes out any buffered data. This does nothing if there + * is no currently buffered data. + * + * @throws IOException + */ + private void flushBuffer() throws IOException { + if (buffer.position() > 0) { + buffer.flip(); + writeCompressed(buffer); + buffer.clear(); + } + } + + /** + * {@link #calculateCRC32C(byte[], int, int) Calculates} the crc, compresses + * the data, determines if the compression ratio is acceptable and calls + * {@link #writeBlock(OutputStream, byte[], int, int, boolean, int)} to + * actually write the frame. + * + * @param input + * The byte[] containing the raw data to be compressed. + * @param offset + * The offset into input where the data starts. + * @param length + * The amount of data in input. + * @throws IOException + */ + private void writeCompressed(ByteBuffer buffer) throws IOException { + + final byte[] input = buffer.array(); + final int length = buffer.remaining(); + + // crc is based on the user supplied input data + final int crc32c = calculateCRC32C(input, 0, length); + + final int compressedLength = Snappy.compress(input, 0, length, + outputBuffer, 0); + + // only use the compressed data if copmression ratio is <= the + // minCompressonRatio + if (((double) compressedLength / (double) length) <= minCompressionRatio) { + writeBlock(out, outputBuffer, 0, compressedLength, true, crc32c); + } else { + // otherwise use the uncomprssed data. + writeBlock(out, input, 0, length, false, crc32c); + } + } + + /** + * Calculates a masked CRC32C checksum over the data. + * + * @param data + * @param offset + * @param length + * @return The CRC32 checksum. + */ + private int calculateCRC32C(byte[] data, int offset, int length) { + return maskedCrc32c(data, offset, length); + } + + /** + * Write a frame (block) to out. + * + * @param out + * The {@link OutputStream} to write to. + * @param data + * The data to write. + * @param offset + * The offset in data to start at. + * @param length + * The length of data to use. + * @param compressed + * Indicates if data is the compressed or raw content. + * This is based on whether the compression ratio desired is + * reached. + * @param crc32c + * The calculated checksum. + * @throws IOException + */ + private void writeBlock(final OutputStream out, byte[] data, int offset, + int length, boolean compressed, int crc32c) throws IOException { + out.write(compressed ? COMPRESSED_DATA_FLAG : UNCOMPRESSED_DATA_FLAG); + + // the length written out to the header is both the checksum and the + // frame + final int headerLength = length + 4; + + // write length + out.write(headerLength); + out.write(headerLength >>> 8); + out.write(headerLength >>> 16); + + // write crc32c of user input data + out.write(crc32c); + out.write(crc32c >>> 8); + out.write(crc32c >>> 16); + out.write(crc32c >>> 24); + + // write data + out.write(data, offset, length); + } +} diff --git a/src/main/java/org/xerial/snappy/SnappyLoader.java b/src/main/java/org/xerial/snappy/SnappyLoader.java index 56f719b..b946460 100755 --- a/src/main/java/org/xerial/snappy/SnappyLoader.java +++ b/src/main/java/org/xerial/snappy/SnappyLoader.java @@ -24,24 +24,11 @@ //-------------------------------------- package org.xerial.snappy; -import java.io.BufferedInputStream; -import java.io.ByteArrayOutputStream; -import java.io.File; -import java.io.FileInputStream; -import java.io.FileOutputStream; -import java.io.IOException; -import java.io.InputStream; -import java.lang.reflect.InvocationTargetException; -import java.lang.reflect.Method; +import java.io.*; import java.net.URL; -import java.security.DigestInputStream; -import java.security.MessageDigest; -import java.security.NoSuchAlgorithmException; -import java.security.ProtectionDomain; -import java.util.ArrayList; import java.util.Enumeration; -import java.util.List; import java.util.Properties; +import java.util.UUID; /** * Internal only - Do not use this class. This class loads a native @@ -94,14 +81,21 @@ public class SnappyLoader public static final String KEY_SNAPPY_DISABLE_BUNDLED_LIBS = "org.xerial.snappy.disable.bundled.libs"; // Depreciated, but preserved for backward compatibility private static volatile boolean isLoaded = false; - private static volatile Object api = null; - + private static volatile SnappyNative api = null; + + private static File nativeLibFile = null; + + static void cleanUpExtractedNativeLib() { + if(nativeLibFile != null && nativeLibFile.exists()) + nativeLibFile.delete(); + } + /** * Set the api instance. * * @param nativeCode */ - static synchronized void setApi(Object nativeCode) + static synchronized void setApi(SnappyNative nativeCode) { api = nativeCode; } @@ -142,97 +136,16 @@ public class SnappyLoader loadSnappySystemProperties(); } - private static ClassLoader getRootClassLoader() { - ClassLoader cl = Thread.currentThread().getContextClassLoader(); - while (cl.getParent() != null) { - cl = cl.getParent(); - } - return cl; - } - - private static byte[] getByteCode(String resourcePath) throws IOException { - - InputStream in = SnappyLoader.class.getResourceAsStream(resourcePath); - if (in == null) - throw new IOException(resourcePath + " is not found"); - byte[] buf = new byte[1024]; - ByteArrayOutputStream byteCodeBuf = new ByteArrayOutputStream(); - for (int readLength; (readLength = in.read(buf)) != -1;) { - byteCodeBuf.write(buf, 0, readLength); - } - in.close(); - - return byteCodeBuf.toByteArray(); - } - - public static boolean isNativeLibraryLoaded() { - return isLoaded; - } - - private static boolean hasInjectedNativeLoader() { - try { - final String nativeLoaderClassName = "org.xerial.snappy.SnappyNativeLoader"; - Class< ? > c = Class.forName(nativeLoaderClassName); - // If this native loader class is already defined, it means that another class loader already loaded the native library of snappy - return true; - } - catch (ClassNotFoundException e) { - // do loading - return false; - } - } - - /** - * Load SnappyNative and its JNI native implementation using the root class - * loader. This hack is for avoiding the JNI multi-loading issue when the - * same JNI library is loaded by different class loaders. - * - * In order to load native code in the root class loader, this method first - * inject SnappyNativeLoader class into the root class loader, because - * {@link System#load(String)} method uses the class loader of the caller - * class when loading native libraries. - * - * 
-     * (root class loader) -> [SnappyNativeLoader (load JNI code), SnappyNative (has native methods), SnappyNativeAPI, SnappyErrorCode]  (injected by this method)
-     *    |
-     *    |
-     * (child class loader) -> Sees the above classes loaded by the root class loader.
-     *   Then creates SnappyNativeAPI implementation by instantiating SnappyNaitive class.
-     *
- * - * - * 
-     * (root class loader) -> [SnappyNativeLoader, SnappyNative ...]  -> native code is loaded by once in this class loader 
-     *   |   \
-     *   |    (child2 class loader)      
-     * (child1 class loader)
-     * 
-     * child1 and child2 share the same SnappyNative code loaded by the root class loader.
-     *
- * - * Note that Java's class loader first delegates the class lookup to its - * parent class loader. So once SnappyNativeLoader is loaded by the root - * class loader, no child class loader initialize SnappyNativeLoader again. - * - * @return - */ - static synchronized Object load() + static synchronized SnappyNative load() { if (api != null) return api; try { - if (!hasInjectedNativeLoader()) { - // Inject SnappyNativeLoader (src/main/resources/org/xerial/snappy/SnappyNativeLoader.bytecode) to the root class loader - Class< ? > nativeLoader = injectSnappyNativeLoader(); - // Load the JNI code using the injected loader - loadNativeLibrary(nativeLoader); - } + loadNativeLibrary(); + setApi(new SnappyNative()); isLoaded = true; - // Look up SnappyNative, injected to the root classloder, using reflection in order to avoid the initialization of SnappyNative class in this context class loader. - Object nativeCode = Class.forName("org.xerial.snappy.SnappyNative").newInstance(); - setApi(nativeCode); } catch (Exception e) { e.printStackTrace(); @@ -243,119 +156,40 @@ public class SnappyLoader } /** - * Inject SnappyNativeLoader class to the root class loader - * - * @return native code loader class initialized in the root class loader + * Load a native library of snappy-java */ - private static Class< ? > injectSnappyNativeLoader() { + private static void loadNativeLibrary() { - try { - // Use parent class loader to load SnappyNative, since Tomcat, which uses different class loaders for each webapps, cannot load JNI interface twice - - final String nativeLoaderClassName = "org.xerial.snappy.SnappyNativeLoader"; - ClassLoader rootClassLoader = getRootClassLoader(); - // Load a byte code - byte[] byteCode = getByteCode("/org/xerial/snappy/SnappyNativeLoader.bytecode"); - // In addition, we need to load the other dependent classes (e.g., SnappyNative and SnappyException) using the system class loader - final String[] classesToPreload = new String[] { "org.xerial.snappy.SnappyNativeAPI", - "org.xerial.snappy.SnappyNative", "org.xerial.snappy.SnappyErrorCode" }; - List preloadClassByteCode = new ArrayList(classesToPreload.length); - for (String each : classesToPreload) { - preloadClassByteCode.add(getByteCode(String.format("/%s.class", each.replaceAll("\\.", "/")))); - } - - // Create SnappyNativeLoader class from a byte code - Class< ? > classLoader = Class.forName("java.lang.ClassLoader"); - Method defineClass = classLoader.getDeclaredMethod("defineClass", new Class[] { String.class, byte[].class, - int.class, int.class, ProtectionDomain.class }); - - ProtectionDomain pd = System.class.getProtectionDomain(); - - // ClassLoader.defineClass is a protected method, so we have to make it accessible - defineClass.setAccessible(true); - try { - // Create a new class using a ClassLoader#defineClass - defineClass.invoke(rootClassLoader, nativeLoaderClassName, byteCode, 0, byteCode.length, pd); - - // And also define dependent classes in the root class loader - for (int i = 0; i < classesToPreload.length; ++i) { - byte[] b = preloadClassByteCode.get(i); - defineClass.invoke(rootClassLoader, classesToPreload[i], b, 0, b.length, pd); - } - } - finally { - // Reset the accessibility to defineClass method - defineClass.setAccessible(false); - } - - // Load the SnappyNativeLoader class - return rootClassLoader.loadClass(nativeLoaderClassName); - - } - catch (Exception e) { - e.printStackTrace(System.err); - throw new SnappyError(SnappyErrorCode.FAILED_TO_LOAD_NATIVE_LIBRARY, e.getMessage()); - } - - } - - /** - * Load snappy-java's native code using load method of the - * SnappyNativeLoader class injected to the root class loader. - * - * @param loaderClass - * @throws SecurityException - * @throws NoSuchMethodException - * @throws IllegalArgumentException - * @throws IllegalAccessException - * @throws InvocationTargetException - */ - private static void loadNativeLibrary(Class< ? > loaderClass) throws SecurityException, NoSuchMethodException, - IllegalArgumentException, IllegalAccessException, InvocationTargetException { - if (loaderClass == null) - throw new SnappyError(SnappyErrorCode.FAILED_TO_LOAD_NATIVE_LIBRARY, "missing snappy native loader class"); - - File nativeLib = findNativeLibrary(); - if (nativeLib != null) { - // Load extracted or specified snappyjava native library. - Method loadMethod = loaderClass.getDeclaredMethod("load", new Class[] { String.class }); - loadMethod.invoke(null, nativeLib.getAbsolutePath()); + nativeLibFile = findNativeLibrary(); + if (nativeLibFile != null) { + // Load extracted or specified snappyjava native library. + System.load(nativeLibFile.getAbsolutePath()); } else { - // Load preinstalled snappyjava (in the path -Djava.library.path) - Method loadMethod = loaderClass.getDeclaredMethod("loadLibrary", new Class[] { String.class }); - loadMethod.invoke(null, "snappyjava"); + // Load preinstalled snappyjava (in the path -Djava.library.path) + System.loadLibrary("snappyjava"); } } - /** - * Computes the MD5 value of the input stream - * - * @param input - * @return - * @throws IOException - * @throws NoSuchAlgorithmException - */ - static String md5sum(InputStream input) throws IOException { - BufferedInputStream in = new BufferedInputStream(input); - try { - MessageDigest digest = java.security.MessageDigest.getInstance("MD5"); - DigestInputStream digestInputStream = new DigestInputStream(in, digest); - for (; digestInputStream.read() >= 0;) { - } - ByteArrayOutputStream md5out = new ByteArrayOutputStream(); - md5out.write(digest.digest()); - return md5out.toString(); + private static boolean contentsEquals(InputStream in1, InputStream in2) throws IOException { + if(!(in1 instanceof BufferedInputStream)) { + in1 = new BufferedInputStream(in1); } - catch (NoSuchAlgorithmException e) { - throw new IllegalStateException("MD5 algorithm is not available: " + e); + if(!(in2 instanceof BufferedInputStream)) { + in2 = new BufferedInputStream(in2); } - finally { - in.close(); + + int ch = in1.read(); + while(ch != -1) { + int ch2 = in2.read(); + if(ch != ch2) + return false; + ch = in1.read(); } + int ch2 = in2.read(); + return ch2 == -1; } - /** * Extract the specified library file to the target folder * @@ -366,50 +200,64 @@ public class SnappyLoader */ private static File extractLibraryFile(String libFolderForCurrentOS, String libraryFileName, String targetFolder) { String nativeLibraryFilePath = libFolderForCurrentOS + "/" + libraryFileName; - final String prefix = "snappy-" + getVersion() + "-"; - String extractedLibFileName = prefix + libraryFileName; + + // Attach UUID to the native library file to ensure multiple class loaders can read the libsnappy-java multiple times. + String uuid = UUID.randomUUID().toString(); + String extractedLibFileName = String.format("snappy-%s-%s-%s", getVersion(), uuid, libraryFileName); File extractedLibFile = new File(targetFolder, extractedLibFileName); try { - if (extractedLibFile.exists()) { - // test md5sum value - String md5sum1 = md5sum(SnappyLoader.class.getResourceAsStream(nativeLibraryFilePath)); - String md5sum2 = md5sum(new FileInputStream(extractedLibFile)); - - if (md5sum1.equals(md5sum2)) { - return new File(targetFolder, extractedLibFileName); - } - else { - // remove old native library file - boolean deletionSucceeded = extractedLibFile.delete(); - if (!deletionSucceeded) { - throw new IOException("failed to remove existing native library file: " - + extractedLibFile.getAbsolutePath()); - } - } - } - // Extract a native library file into the target directory InputStream reader = SnappyLoader.class.getResourceAsStream(nativeLibraryFilePath); FileOutputStream writer = new FileOutputStream(extractedLibFile); - byte[] buffer = new byte[8192]; - int bytesRead = 0; - while ((bytesRead = reader.read(buffer)) != -1) { - writer.write(buffer, 0, bytesRead); + try { + byte[] buffer = new byte[8192]; + int bytesRead = 0; + while ((bytesRead = reader.read(buffer)) != -1) { + writer.write(buffer, 0, bytesRead); + } } + finally { + // Delete the extracted lib file on JVM exit. + extractedLibFile.deleteOnExit(); - writer.close(); - reader.close(); + if(writer != null) + writer.close(); + if(reader != null) + reader.close(); + } // Set executable (x) flag to enable Java to load the native library if (!System.getProperty("os.name").contains("Windows")) { try { Runtime.getRuntime().exec(new String[] { "chmod", "755", extractedLibFile.getAbsolutePath() }) .waitFor(); + + // Use following methods added since Java6 (If discarding Java5 is acceptable) + //extractedLibFile.setReadable(true); + //extractedLibFile.setWritable(true, true); + //extractedLibFile.setExecutable(true); } catch (Throwable e) {} } + + // Check whether the contents are properly copied from the resource folder + { + InputStream nativeIn = SnappyLoader.class.getResourceAsStream(nativeLibraryFilePath); + InputStream extractedLibIn = new FileInputStream(extractedLibFile); + try { + if(!contentsEquals(nativeIn, extractedLibIn)) + throw new SnappyError(SnappyErrorCode.FAILED_TO_LOAD_NATIVE_LIBRARY, String.format("Failed to write a native library file at %s", extractedLibFile)); + } + finally { + if(nativeIn != null) + nativeIn.close(); + if(extractedLibIn != null) + extractedLibIn.close(); + } + } + return new File(targetFolder, extractedLibFileName); } catch (IOException e) { @@ -460,7 +308,7 @@ public class SnappyLoader throw new SnappyError(SnappyErrorCode.FAILED_TO_LOAD_NATIVE_LIBRARY, errorMessage); } - // Temporary library folder. Use the value of org.xerial.snappy.tempdir or java.io.tmpdir + // Temporary folder for the native lib. Use the value of org.xerial.snappy.tempdir or java.io.tmpdir String tempFolder = new File(System.getProperty(KEY_SNAPPY_TEMPDIR, System.getProperty("java.io.tmpdir"))).getAbsolutePath(); @@ -475,8 +323,6 @@ public class SnappyLoader - - /** * Get the snappy-java version by reading pom.properties embedded in jar. * This version data is used as a suffix of a dll file extracted from the diff --git a/src/main/java/org/xerial/snappy/SnappyNative.cpp b/src/main/java/org/xerial/snappy/SnappyNative.cpp index 386b039..78af982 100755 --- a/src/main/java/org/xerial/snappy/SnappyNative.cpp +++ b/src/main/java/org/xerial/snappy/SnappyNative.cpp @@ -33,7 +33,7 @@ void throw_exception(JNIEnv *env, jobject self, int errorCode) JNIEXPORT jstring JNICALL Java_org_xerial_snappy_SnappyNative_nativeLibraryVersion (JNIEnv * env, jobject self) { - return env->NewStringUTF("1.0.4"); + return env->NewStringUTF("1.1.0"); } JNIEXPORT jlong JNICALL Java_org_xerial_snappy_SnappyNative_rawCompress__JJJ @@ -90,6 +90,12 @@ JNIEXPORT jint JNICALL Java_org_xerial_snappy_SnappyNative_rawCompress__Ljava_la char* out = (char*) env->GetPrimitiveArrayCritical((jarray) output, 0); if(in == 0 || out == 0) { // out of memory + if(in != 0) { + env->ReleasePrimitiveArrayCritical((jarray) input, in, 0); + } + if(out != 0) { + env->ReleasePrimitiveArrayCritical((jarray) output, out, 0); + } throw_exception(env, self, 4); return 0; } @@ -110,6 +116,12 @@ JNIEXPORT jint JNICALL Java_org_xerial_snappy_SnappyNative_rawUncompress__Ljava_ char* out = (char*) env->GetPrimitiveArrayCritical((jarray) output, 0); if(in == 0 || out == 0) { // out of memory + if(in != 0) { + env->ReleasePrimitiveArrayCritical((jarray) input, in, 0); + } + if(out != 0) { + env->ReleasePrimitiveArrayCritical((jarray) output, out, 0); + } throw_exception(env, self, 4); return 0; } @@ -258,6 +270,19 @@ JNIEXPORT jboolean JNICALL Java_org_xerial_snappy_SnappyNative_isValidCompressed return ret; } +JNIEXPORT jboolean JNICALL Java_org_xerial_snappy_SnappyNative_isValidCompressedBuffer__JJJ + (JNIEnv * env, jobject self, jlong inputAddr, jlong offset, jlong length) +{ + if(inputAddr == 0) { + // out of memory + throw_exception(env, self, 4); + return 0; + } + bool ret = snappy::IsValidCompressedBuffer((char*) (inputAddr + offset), (size_t) length); + return ret; +} + + JNIEXPORT void JNICALL Java_org_xerial_snappy_SnappyNative_arrayCopy (JNIEnv * env, jobject self, jobject input, jint offset, jint length, jobject output, jint output_offset) { @@ -265,6 +290,12 @@ JNIEXPORT void JNICALL Java_org_xerial_snappy_SnappyNative_arrayCopy char* dest = (char*) env->GetPrimitiveArrayCritical((jarray) output, 0); if(src == 0 || dest == 0) { // out of memory + if(src != 0) { + env->ReleasePrimitiveArrayCritical((jarray) input, src, 0); + } + if(dest != 0) { + env->ReleasePrimitiveArrayCritical((jarray) output, dest, 0); + } throw_exception(env, self, 4); return; } diff --git a/src/main/java/org/xerial/snappy/SnappyNative.h b/src/main/java/org/xerial/snappy/SnappyNative.h index 477d30a..d1f3e58 100755 --- a/src/main/java/org/xerial/snappy/SnappyNative.h +++ b/src/main/java/org/xerial/snappy/SnappyNative.h @@ -111,6 +111,14 @@ JNIEXPORT jboolean JNICALL Java_org_xerial_snappy_SnappyNative_isValidCompressed JNIEXPORT jboolean JNICALL Java_org_xerial_snappy_SnappyNative_isValidCompressedBuffer__Ljava_lang_Object_2II (JNIEnv *, jobject, jobject, jint, jint); +/* + * Class: org_xerial_snappy_SnappyNative + * Method: isValidCompressedBuffer + * Signature: (JJJ)Z + */ +JNIEXPORT jboolean JNICALL Java_org_xerial_snappy_SnappyNative_isValidCompressedBuffer__JJJ + (JNIEnv *, jobject, jlong, jlong, jlong); + /* * Class: org_xerial_snappy_SnappyNative * Method: arrayCopy diff --git a/src/main/java/org/xerial/snappy/SnappyNative.java b/src/main/java/org/xerial/snappy/SnappyNative.java index fdcb617..b95e213 100755 --- a/src/main/java/org/xerial/snappy/SnappyNative.java +++ b/src/main/java/org/xerial/snappy/SnappyNative.java @@ -28,8 +28,7 @@ import java.io.IOException; import java.nio.ByteBuffer; /** - * Internal only - Do not use this class. JNI interface of the - * {@link SnappyNativeAPI} implementation. The native method in this class is + * JNI interface of the {@link Snappy} implementation. The native method in this class is * defined in SnappyNative.h (genereted by javah) and SnappyNative.cpp * *

@@ -40,7 +39,7 @@ import java.nio.ByteBuffer; * @author leo * */ -public class SnappyNative implements SnappyNativeAPI +public class SnappyNative { public native String nativeLibraryVersion(); @@ -77,6 +76,8 @@ public class SnappyNative implements SnappyNativeAPI public native boolean isValidCompressedBuffer(Object input, int offset, int len) throws IOException; + public native boolean isValidCompressedBuffer(long inputAddr, long offset, long len) throws IOException; + public native void arrayCopy(Object src, int offset, int byteLength, Object dest, int dOffset) throws IOException; public void throw_error(int errorCode) throws IOException { diff --git a/src/main/java/org/xerial/snappy/SnappyNativeAPI.java b/src/main/java/org/xerial/snappy/SnappyNativeAPI.java deleted file mode 100755 index b6c92d0..0000000 --- a/src/main/java/org/xerial/snappy/SnappyNativeAPI.java +++ /dev/null @@ -1,82 +0,0 @@ -/*-------------------------------------------------------------------------- - * Copyright 2011 Taro L. Saito - * - * Licensed under the Apache License, Version 2.0 (the "License"); - * you may not use this file except in compliance with the License. - * You may obtain a copy of the License at - * - * http://www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, software - * distributed under the License is distributed on an "AS IS" BASIS, - * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - * See the License for the specific language governing permissions and - * limitations under the License. - *--------------------------------------------------------------------------*/ -//-------------------------------------- -// snappy-java Project -// -// SnappyNative.java -// Since: 2011/03/30 -// -// $URL$ -// $Author$ -//-------------------------------------- -package org.xerial.snappy; - -import java.io.IOException; -import java.nio.ByteBuffer; - -/** - * Internal only - Do not use this class. - * - * Interface to access the native code of Snappy. Although this class members - * are public, do not use them directly. Use {@link Snappy} API instead. - * - * - * @author leo - * - */ -public interface SnappyNativeAPI -{ - - public String nativeLibraryVersion(); - - // ------------------------------------------------------------------------ - // Generic compression/decompression routines. - // ------------------------------------------------------------------------ - public long rawCompress(long inputAddr, long inputSize, long destAddr) throws IOException; - public long rawUncompress(long inputAddr, long inputSize, long destAddr) throws IOException; - - public int rawCompress(ByteBuffer input, int inputOffset, int inputLength, ByteBuffer compressed, int outputOffset) - throws IOException; - - public int rawCompress(Object input, int inputOffset, int inputByteLength, Object output, int outputOffset) throws IOException; - - public int rawUncompress(ByteBuffer compressed, int inputOffset, int inputLength, ByteBuffer uncompressed, - int outputOffset) throws IOException; - - public int rawUncompress(Object input, int inputOffset, int inputLength, Object output, int outputOffset) - throws IOException; - - // Returns the maximal size of the compressed representation of - // input data that is "source_bytes" bytes in length; - public int maxCompressedLength(int source_bytes); - - // This operation takes O(1) time. - public int uncompressedLength(ByteBuffer compressed, int offset, int len) throws IOException; - - public int uncompressedLength(Object input, int offset, int len) throws IOException; - - public long uncompressedLength(long inputAddr, long len) throws IOException; - - - public boolean isValidCompressedBuffer(ByteBuffer compressed, int offset, int len) throws IOException; - - public boolean isValidCompressedBuffer(Object input, int offset, int len) throws IOException; - - public void arrayCopy(Object src, int offset, int byteLength, Object dest, int dOffset) throws IOException; - - public void throw_error(int errorCode) throws IOException; - -} diff --git a/src/main/resources/org/xerial/snappy/native/Linux/amd64/libsnappyjava.so b/src/main/resources/org/xerial/snappy/native/Linux/amd64/libsnappyjava.so deleted file mode 100755 index 20cf560..0000000 Binary files a/src/main/resources/org/xerial/snappy/native/Linux/amd64/libsnappyjava.so and /dev/null differ diff --git a/src/main/resources/org/xerial/snappy/native/Linux/arm/libsnappyjava.so b/src/main/resources/org/xerial/snappy/native/Linux/arm/libsnappyjava.so index 3299072..0aa1d90 100755 Binary files a/src/main/resources/org/xerial/snappy/native/Linux/arm/libsnappyjava.so and b/src/main/resources/org/xerial/snappy/native/Linux/arm/libsnappyjava.so differ diff --git a/src/main/resources/org/xerial/snappy/native/Linux/armhf/libsnappyjava.so b/src/main/resources/org/xerial/snappy/native/Linux/armhf/libsnappyjava.so index 23b37c6..1bf749c 100755 Binary files a/src/main/resources/org/xerial/snappy/native/Linux/armhf/libsnappyjava.so and 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/dev/null and b/src/main/resources/org/xerial/snappy/native/SunOS/sparc/libsnappyjava.so differ diff --git a/src/main/resources/org/xerial/snappy/native/SunOS/x86/libsnappyjava.so b/src/main/resources/org/xerial/snappy/native/SunOS/x86/libsnappyjava.so new file mode 100755 index 0000000..e9edcf5 Binary files /dev/null and b/src/main/resources/org/xerial/snappy/native/SunOS/x86/libsnappyjava.so differ diff --git a/src/main/resources/org/xerial/snappy/native/Windows/x86/snappyjava.dll b/src/main/resources/org/xerial/snappy/native/Windows/x86/snappyjava.dll index 5fc4252..5317765 100755 Binary files a/src/main/resources/org/xerial/snappy/native/Windows/x86/snappyjava.dll and b/src/main/resources/org/xerial/snappy/native/Windows/x86/snappyjava.dll differ diff --git a/src/main/resources/org/xerial/snappy/native/Windows/amd64/snappyjava.dll b/src/main/resources/org/xerial/snappy/native/Windows/x86_64/snappyjava.dll similarity index 58% rename from src/main/resources/org/xerial/snappy/native/Windows/amd64/snappyjava.dll rename to src/main/resources/org/xerial/snappy/native/Windows/x86_64/snappyjava.dll index a54064f..b367f2a 100755 Binary files a/src/main/resources/org/xerial/snappy/native/Windows/amd64/snappyjava.dll and b/src/main/resources/org/xerial/snappy/native/Windows/x86_64/snappyjava.dll differ diff --git a/src/test/java/org/xerial/snappy/CalgaryTest.java b/src/test/java/org/xerial/snappy/CalgaryTest.java index 1f98af2..de72038 100755 --- a/src/test/java/org/xerial/snappy/CalgaryTest.java +++ b/src/test/java/org/xerial/snappy/CalgaryTest.java @@ -24,14 +24,20 @@ //-------------------------------------- package org.xerial.snappy; -import static org.junit.Assert.*; +import static org.junit.Assert.assertArrayEquals; +import static org.junit.Assert.assertEquals; import java.io.ByteArrayInputStream; import java.io.ByteArrayOutputStream; +import java.io.File; +import java.io.FileInputStream; +import java.io.FileOutputStream; import java.io.IOException; import java.io.InputStream; +import org.junit.Rule; import org.junit.Test; +import org.junit.rules.TemporaryFolder; import org.xerial.util.FileResource; import org.xerial.util.log.Logger; @@ -44,6 +50,9 @@ import org.xerial.util.log.Logger; public class CalgaryTest { private static Logger _logger = Logger.getLogger(CalgaryTest.class); + + @Rule + public final TemporaryFolder tempFolder = new TemporaryFolder(); static byte[] readFile(String file) throws IOException { InputStream in = FileResource.find(CalgaryTest.class, file).openStream(); @@ -91,6 +100,83 @@ public class CalgaryTest } } + @Test + public void streamFramed() throws Exception { + for (String f : files) { + byte[] orig = readFile("testdata/calgary/" + f); + + ByteArrayOutputStream compressedBuf = new ByteArrayOutputStream(); + SnappyFramedOutputStream out = new SnappyFramedOutputStream(compressedBuf); + out.write(orig); + out.close(); + + SnappyFramedInputStream in = new SnappyFramedInputStream(new ByteArrayInputStream(compressedBuf.toByteArray())); + + byte[] uncompressed = new byte[orig.length]; + int readBytes = readBytes(in, uncompressed, 0, orig.length); + + assertEquals(orig.length, readBytes); + assertArrayEquals(orig, uncompressed); + } + } + + @Test + public void streamFramedToFile() throws Exception { + for (String f : files) { + byte[] orig = readFile("testdata/calgary/" + f); + + final File tempFile = tempFolder.newFile(f); + final FileOutputStream compressedFOS = new FileOutputStream(tempFile); + try + { + SnappyFramedOutputStream out = new SnappyFramedOutputStream(compressedFOS); + out.write(orig); + out.close(); + } + finally + { + compressedFOS.close(); + } + + byte[] uncompressed = new byte[orig.length]; + + final FileInputStream compressedFIS = new FileInputStream(tempFile); + try + { + SnappyFramedInputStream in = new SnappyFramedInputStream(compressedFIS.getChannel()); + int readBytes = readBytes(in, uncompressed, 0, orig.length); + + assertEquals(orig.length, readBytes); + } + finally + { + compressedFIS.close(); + } + + assertArrayEquals(orig, uncompressed); + } + } + + @Test + public void streamFramedNoCRCVerify() throws Exception { + for (String f : files) { + byte[] orig = readFile("testdata/calgary/" + f); + + ByteArrayOutputStream compressedBuf = new ByteArrayOutputStream(); + SnappyFramedOutputStream out = new SnappyFramedOutputStream(compressedBuf); + out.write(orig); + out.close(); + + SnappyFramedInputStream in = new SnappyFramedInputStream(new ByteArrayInputStream(compressedBuf.toByteArray()), false); + + byte[] uncompressed = new byte[orig.length]; + int readBytes = readBytes(in, uncompressed, 0, orig.length); + + assertEquals(orig.length, readBytes); + assertArrayEquals(orig, uncompressed); + } + } + @Test public void byteWiseRead() throws Exception { for (String f : files) { @@ -115,4 +201,28 @@ public class CalgaryTest } } + static final int readBytes(InputStream source, byte[] dest, int offset, int length) throws IOException + { + // how many bytes were read. + int lastRead = source.read(dest, offset, length); + + int totalRead = lastRead; + + // if we did not read as many bytes as we had hoped, try reading again. + if (lastRead < length) + { + // as long the buffer is not full (remaining() == 0) and we have not reached EOF (lastRead == -1) keep reading. + while (totalRead < length && lastRead != -1) + { + lastRead = source.read(dest, offset + totalRead, length - totalRead); + + // if we got EOF, do not add to total read. + if (lastRead != -1) + { + totalRead += lastRead; + } + } + } + return totalRead; + } } diff --git a/src/test/java/org/xerial/snappy/RandomGenerator.java b/src/test/java/org/xerial/snappy/RandomGenerator.java new file mode 100644 index 0000000..c75a8aa --- /dev/null +++ b/src/test/java/org/xerial/snappy/RandomGenerator.java @@ -0,0 +1,68 @@ +/* + * Created: Apr 15, 2013 + */ +package org.xerial.snappy; + +import java.util.Random; + +/** + * Generates random data with specific expected snappy performance characteristics. + * + *

+ * This has been copied from dain's snappy implementation.. + *

+ */ +public class RandomGenerator { + + public final byte[] data; + public int position; + + public RandomGenerator(double compressionRatio) { + // We use a limited amount of data over and over again and ensure + // that it is larger than the compression window (32KB), and also + // large enough to serve all typical value sizes we want to write. + Random rnd = new Random(301); + data = new byte[1048576 + 100]; + for (int i = 0; i < 1048576; i += 100) { + // Add a short fragment that is as compressible as specified ratio + System.arraycopy(compressibleData(rnd, compressionRatio, 100), 0, + data, i, 100); + } + } + + public int getNextPosition(int length) { + if (position + length > data.length) { + position = 0; + assert (length < data.length); + } + int result = position; + position += length; + return result; + } + + private static byte[] compressibleData(Random random, + double compressionRatio, int length) { + int raw = (int) (length * compressionRatio); + if (raw < 1) { + raw = 1; + } + byte[] rawData = generateRandomData(random, raw); + + // Duplicate the random data until we have filled "length" bytes + byte[] dest = new byte[length]; + for (int i = 0; i < length;) { + int chunkLength = Math.min(rawData.length, length - i); + System.arraycopy(rawData, 0, dest, i, chunkLength); + i += chunkLength; + } + return dest; + } + + private static byte[] generateRandomData(Random random, int length) { + byte[] rawData = new byte[length]; + for (int i = 0; i < rawData.length; i++) { + rawData[i] = (byte) random.nextInt(256); + } + return rawData; + } +} \ No newline at end of file diff --git a/src/test/java/org/xerial/snappy/SnappyFramedStreamTest.java b/src/test/java/org/xerial/snappy/SnappyFramedStreamTest.java new file mode 100644 index 0000000..decb43e --- /dev/null +++ b/src/test/java/org/xerial/snappy/SnappyFramedStreamTest.java @@ -0,0 +1,300 @@ +/* + * Created: Mar 14, 2013 + */ +package org.xerial.snappy; + +import static org.xerial.snappy.SnappyFramed.*; +import static org.junit.Assert.*; + +import java.io.ByteArrayInputStream; +import java.io.ByteArrayOutputStream; +import java.io.EOFException; +import java.io.IOException; +import java.io.InputStream; +import java.io.OutputStream; +import java.util.Arrays; + +import org.junit.Test; + +/** + * Tests the functionality of {@link org.xerial.snappy.SnappyFramedInputStream} + * and {@link org.xerial.snappy.SnappyFramedOutputStream}. + * + * @author Brett Okken + */ +public class SnappyFramedStreamTest { + + /** + * @throws IOException + */ + protected OutputStream createOutputStream(OutputStream target) + throws IOException { + return new SnappyFramedOutputStream(target); + } + + /** + * {@inheritDoc} + * + * @throws IOException + */ + protected InputStream createInputStream(InputStream source, + boolean verifyCheckSums) throws IOException { + return new SnappyFramedInputStream(source, verifyCheckSums); + } + + protected byte[] getMarkerFrame() { + return HEADER_BYTES; + } + + @Test + public void testSimple() throws Exception { + byte[] original = "aaaaaaaaaaaabbbbbbbaaaaaa".getBytes("utf-8"); + + byte[] compressed = compress(original); + byte[] uncompressed = uncompress(compressed); + + assertArrayEquals(uncompressed, original); + // 10 byte stream header, 4 byte block header, 4 byte crc, 19 bytes + assertEquals(compressed.length, 37); + + // stream header + assertArrayEquals(Arrays.copyOf(compressed, 10), HEADER_BYTES); + + // flag: compressed + assertEquals(toInt(compressed[10]), COMPRESSED_DATA_FLAG); + + // length: 23 = 0x000017 + assertEquals(toInt(compressed[11]), 0x17); + assertEquals(toInt(compressed[12]), 0x00); + assertEquals(toInt(compressed[13]), 0x00); + + // crc32c: 0x9274cda8 + assertEquals(toInt(compressed[17]), 0x92); + assertEquals(toInt(compressed[16]), 0x74); + assertEquals(toInt(compressed[15]), 0xCD); + assertEquals(toInt(compressed[14]), 0xA8); + } + + @Test + public void testUncompressable() throws Exception { + byte[] random = getRandom(1, 5000); + int crc32c = maskedCrc32c(random); + + byte[] compressed = compress(random); + byte[] uncompressed = uncompress(compressed); + + assertArrayEquals(uncompressed, random); + assertEquals(compressed.length, random.length + 10 + 4 + 4); + + // flag: uncompressed + assertEquals(toInt(compressed[10]), UNCOMPRESSED_DATA_FLAG); + + // length: 5004 = 0x138c + assertEquals(toInt(compressed[13]), 0x00); + assertEquals(toInt(compressed[12]), 0x13); + assertEquals(toInt(compressed[11]), 0x8c); + } + + @Test + public void testEmptyCompression() throws Exception { + byte[] empty = new byte[0]; + assertArrayEquals(compress(empty), HEADER_BYTES); + assertArrayEquals(uncompress(HEADER_BYTES), empty); + } + + @Test(expected = EOFException.class) + public void testShortBlockHeader() throws Exception { + uncompressBlock(new byte[] { 0 }); + } + + @Test(expected = EOFException.class) + public void testShortBlockData() throws Exception { + // flag = 0, size = 8, crc32c = 0, block data= [x, x] + uncompressBlock(new byte[] { 1, 8, 0, 0, 0, 0, 0, 0, 'x', 'x' }); + } + + @Test + public void testUnskippableChunkFlags() throws Exception { + for (int i = 2; i <= 0x7f; i++) { + try { + uncompressBlock(new byte[] { (byte) i, 5, 0, 0, 0, 0, 0, 0, 0 }); + fail("no exception thrown with flag: " + Integer.toHexString(i)); + } catch (IOException e) { + + } + } + } + + @Test + public void testSkippableChunkFlags() throws Exception { + for (int i = 0x80; i <= 0xfe; i++) { + try { + uncompressBlock(new byte[] { (byte) i, 5, 0, 0, 0, 0, 0, 0, 0 }); + } catch (IOException e) { + fail("exception thrown with flag: " + Integer.toHexString(i)); + } + } + } + + @Test(expected = IOException.class) + public void testInvalidBlockSizeZero() throws Exception { + // flag = '0', block size = 4, crc32c = 0 + uncompressBlock(new byte[] { 1, 4, 0, 0, 0, 0, 0, 0 }); + } + + @Test(expected = IOException.class) + public void testInvalidChecksum() throws Exception { + // flag = 0, size = 5, crc32c = 0, block data = [a] + uncompressBlock(new byte[] { 1, 5, 0, 0, 0, 0, 0, 0, 'a' }); + } + + @Test + public void testInvalidChecksumIgnoredWhenVerificationDisabled() + throws Exception { + // flag = 0, size = 4, crc32c = 0, block data = [a] + byte[] block = { 1, 5, 0, 0, 0, 0, 0, 0, 'a' }; + ByteArrayInputStream inputData = new ByteArrayInputStream( + blockToStream(block)); + assertArrayEquals(toByteArray(createInputStream(inputData, false)), + new byte[] { 'a' }); + } + + @Test + public void testLargerFrames_raw_() throws IOException { + final byte[] random = getRandom(0.5, 100000); + + final byte[] stream = new byte[HEADER_BYTES.length + 8 + random.length]; + System.arraycopy(HEADER_BYTES, 0, stream, 0, HEADER_BYTES.length); + + stream[10] = UNCOMPRESSED_DATA_FLAG; + + int length = random.length + 4; + stream[11] = (byte) length; + stream[12] = (byte) (length >>> 8); + stream[13] = (byte) (length >>> 16); + + int crc32c = maskedCrc32c(random); + stream[14] = (byte) crc32c; + stream[15] = (byte) (crc32c >>> 8); + stream[16] = (byte) (crc32c >>> 16); + stream[17] = (byte) (crc32c >>> 24); + + System.arraycopy(random, 0, stream, 18, random.length); + + final byte[] uncompressed = uncompress(stream); + + assertArrayEquals(random, uncompressed); + } + + @Test + public void testLargerFrames_compressed_() throws IOException { + final byte[] random = getRandom(0.5, 500000); + + final byte[] compressed = Snappy.compress(random); + + final byte[] stream = new byte[HEADER_BYTES.length + 8 + compressed.length]; + System.arraycopy(HEADER_BYTES, 0, stream, 0, HEADER_BYTES.length); + + stream[10] = COMPRESSED_DATA_FLAG; + + int length = compressed.length + 4; + stream[11] = (byte) length; + stream[12] = (byte) (length >>> 8); + stream[13] = (byte) (length >>> 16); + + int crc32c = maskedCrc32c(random); + stream[14] = (byte) crc32c; + stream[15] = (byte) (crc32c >>> 8); + stream[16] = (byte) (crc32c >>> 16); + stream[17] = (byte) (crc32c >>> 24); + + System.arraycopy(compressed, 0, stream, 18, compressed.length); + + final byte[] uncompressed = uncompress(stream); + + assertArrayEquals(random, uncompressed); + } + + @Test + public void testLargerFrames_compressed_smaller_raw_larger() + throws IOException { + final byte[] random = getRandom(0.5, 100000); + + final byte[] compressed = Snappy.compress(random); + + final byte[] stream = new byte[HEADER_BYTES.length + 8 + + compressed.length]; + System.arraycopy(HEADER_BYTES, 0, stream, 0, HEADER_BYTES.length); + + stream[10] = COMPRESSED_DATA_FLAG; + + int length = compressed.length + 4; + stream[11] = (byte) length; + stream[12] = (byte) (length >>> 8); + stream[13] = (byte) (length >>> 16); + + int crc32c = maskedCrc32c(random); + stream[14] = (byte) crc32c; + stream[15] = (byte) (crc32c >>> 8); + stream[16] = (byte) (crc32c >>> 16); + stream[17] = (byte) (crc32c >>> 24); + + System.arraycopy(compressed, 0, stream, 18, compressed.length); + + final byte[] uncompressed = uncompress(stream); + + assertArrayEquals(random, uncompressed); + } + + private byte[] uncompressBlock(byte[] block) throws IOException { + return uncompress(blockToStream(block)); + } + + private static byte[] blockToStream(byte[] block) { + byte[] stream = new byte[HEADER_BYTES.length + block.length]; + System.arraycopy(HEADER_BYTES, 0, stream, 0, HEADER_BYTES.length); + System.arraycopy(block, 0, stream, HEADER_BYTES.length, block.length); + return stream; + } + + + protected byte[] compress(byte[] original) throws IOException { + ByteArrayOutputStream out = new ByteArrayOutputStream(); + OutputStream snappyOut = createOutputStream(out); + snappyOut.write(original); + snappyOut.close(); + return out.toByteArray(); + } + + protected byte[] uncompress(byte[] compressed) throws IOException { + return toByteArray(createInputStream(new ByteArrayInputStream( + compressed), true)); + } + + private static byte[] toByteArray(InputStream createInputStream) throws IOException { + final ByteArrayOutputStream baos = new ByteArrayOutputStream(64 * 1024); + + final byte[] buffer = new byte[8 * 1024]; + + int read; + while((read = createInputStream.read(buffer)) > 0) { + baos.write(buffer, 0, read); + } + + return baos.toByteArray(); + } + + static int toInt(byte value) { + return value & 0xFF; + } + + private byte[] getRandom(double compressionRatio, int length) { + RandomGenerator gen = new RandomGenerator( + compressionRatio); + gen.getNextPosition(length); + byte[] random = Arrays.copyOf(gen.data, length); + assertEquals(random.length, length); + return random; + } + +} diff --git a/src/test/java/org/xerial/snappy/SnappyLoaderTest.java b/src/test/java/org/xerial/snappy/SnappyLoaderTest.java index 81ecd53..9bcc85f 100755 --- a/src/test/java/org/xerial/snappy/SnappyLoaderTest.java +++ b/src/test/java/org/xerial/snappy/SnappyLoaderTest.java @@ -24,23 +24,20 @@ //-------------------------------------- package org.xerial.snappy; -import static org.junit.Assert.*; - -import java.io.BufferedInputStream; -import java.io.ByteArrayOutputStream; -import java.io.File; -import java.io.FileNotFoundException; -import java.io.IOException; -import java.lang.reflect.Method; -import java.net.URL; -import java.net.URLClassLoader; - import org.codehaus.plexus.classworlds.ClassWorld; import org.codehaus.plexus.classworlds.realm.ClassRealm; import org.junit.Test; import org.xerial.util.FileResource; import org.xerial.util.log.Logger; +import java.io.*; +import java.lang.reflect.Method; +import java.net.URL; +import java.net.URLClassLoader; + +import static org.junit.Assert.assertArrayEquals; +import static org.junit.Assert.fail; + public class SnappyLoaderTest { private static Logger _logger = Logger.getLogger(SnappyLoaderTest.class);