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The GNU General Public License (GPL)
Version 2, June 1991
Copyright (C) 1989, 1991 Free Software Foundation, Inc.
59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
Everyone is permitted to copy and distribute verbatim copies of this license
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Preamble
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/*
* Copyright (c) 1996, 2013, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
#ifndef _JAVASOFT_JNI_MD_H_
#define _JAVASOFT_JNI_MD_H_
#ifndef __has_attribute
#define __has_attribute(x) 0
#endif
#if (defined(__GNUC__) && ((__GNUC__ > 4) || (__GNUC__ == 4) && (__GNUC_MINOR__ > 2))) || __has_attribute(visibility)
#define JNIEXPORT __attribute__((visibility("default")))
#define JNIIMPORT __attribute__((visibility("default")))
#else
#define JNIEXPORT
#define JNIIMPORT
#endif
#define JNICALL
typedef int jint;
#ifdef _LP64 /* 64-bit Solaris */
typedef long jlong;
#else
typedef long long jlong;
#endif
typedef signed char jbyte;
#endif /* !_JAVASOFT_JNI_MD_H_ */

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import org.gradle.internal.os.OperatingSystem
apply plugin: 'java'
apply plugin: 'net.ltgt.errorprone'
repositories {
mavenCentral()
}
configurations.errorprone {
resolutionStrategy.force 'com.google.errorprone:error_prone_core:2.0.9'
}
def generatedJNIHeaderLoc = "${buildDir}/include"
sourceSets {
main {
java {
srcDirs = ["${rootDir}/java/src"]
}
}
}
jar {
description = 'Generates CameraServer jar, with the JNI shared libraries embedded'
baseName = 'cameraserver'
classifier = "$buildPlatform"
duplicatesStrategy = 'exclude'
dependsOn { classes }
model {
binaries {
withType(SharedLibraryBinarySpec) { binary ->
from(file(binary.sharedLibraryFile)) {
into getPlatformPath(binary)
}
}
}
}
}
project.tasks.whenTaskAdded { task ->
if (isArm) {
if (task.name == 'cameraserverSharedLibrary') jar.dependsOn task
} else {
if (task.name == 'cameraserverX64SharedLibrary' || task.name == 'cameraserverX86SharedLibrary')
jar.dependsOn task
}
}
task cameraserverJavaSource(type: Jar, dependsOn: classes) {
description = 'Generates the source jar for CameraServer java'
group = 'WPILib'
baseName = 'cameraserver'
classifier = "sources"
duplicatesStrategy = 'exclude'
from sourceSets.main.allJava
}
task cameraserverJavadoc(type: Jar, dependsOn: javadoc) {
description = 'Generates the javadoc jar for CameraServer java'
group = 'WPILib'
baseName = 'cameraserver'
classifier = "javadoc"
duplicatesStrategy = 'exclude'
from javadoc.destinationDir
}
build.dependsOn cameraserverJavaSource
build.dependsOn cameraserverJavadoc
/**
* Generates the JNI headers
*/
task jniHeadersCameraServer {
description = 'Generates JNI headers from edu.wpi.cameraserver.*'
group = 'WPILib'
def outputFolder = file(generatedJNIHeaderLoc)
inputs.files sourceSets.main.output
outputs.file outputFolder
doLast {
outputFolder.mkdirs()
exec {
executable org.gradle.internal.jvm.Jvm.current().getExecutable('javah')
args '-d', outputFolder
args '-classpath', sourceSets.main.output.classesDir
args 'edu.wpi.cameraserver.CameraServerJNI'
}
}
}
clean {
delete generatedJNIHeaderLoc
}
compileJava {
options.compilerArgs << '-Xlint:unchecked'
}
javadoc {
options.addStringOption('Xdoclint:none', '-quiet')
}
// This creates a lambda that the main build.gradle can access, which sets up the JNI includes for the
// target build platform. This lambda is exposed as a property in the main build.gradle.
ext.setupJniIncludes = { binaries ->
def platformSpecificIncludeFlag = { loc, cppCompiler ->
if (OperatingSystem.current().isWindows()) {
cppCompiler.args "/I$loc"
} else {
cppCompiler.args '-I', loc
}
}
binaries.all {
tasks.withType(CppCompile) {
if (buildPlatform == 'arm') {
cppCompiler.args '-I', file("${rootDir}/java/arm-linux").absolutePath
cppCompiler.args '-I', file("${rootDir}/java/arm-linux/linux").absolutePath
} else {
def jdkLocation = org.gradle.internal.jvm.Jvm.current().javaHome
platformSpecificIncludeFlag("${jdkLocation}/include", cppCompiler)
if (targetPlatform.operatingSystem.macOsX) {
platformSpecificIncludeFlag("${jdkLocation}/include/darwin", cppCompiler)
} else if (targetPlatform.operatingSystem.linux) {
platformSpecificIncludeFlag("${jdkLocation}/include/linux", cppCompiler)
} else if (targetPlatform.operatingSystem.windows) {
platformSpecificIncludeFlag("${jdkLocation}/include/win32", cppCompiler)
} else if (targetPlatform.operatingSystem.freeBSD) {
platformSpecificIncludeFlag("${jdkLocation}/include/freebsd", cppCompiler)
} else if (file("$jdkLocation/include/darwin").exists()) {
// TODO: As of Gradle 2.8, targetPlatform.operatingSystem.macOsX returns false
// on El Capitan. We therefore manually test for the darwin folder and include it
// if it exists
platformSpecificIncludeFlag("${jdkLocation}/include/darwin", cppCompiler)
}
}
jniHeadersCameraServer.outputs.files.each { file ->
if (buildPlatform == 'arm') {
cppCompiler.args '-I', file.getPath()
} else {
platformSpecificIncludeFlag(file.getPath(), cppCompiler)
}
}
dependsOn jniHeadersCameraServer
}
}
}

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package edu.wpi.cameraserver;
import java.io.File;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.nio.ByteBuffer;
public class CameraServerJNI {
static boolean libraryLoaded = false;
static File jniLibrary = null;
static {
if (!libraryLoaded) {
try {
String osname = System.getProperty("os.name");
String resname;
if (osname.startsWith("Windows"))
resname = "/Windows/" + System.getProperty("os.arch") + "/";
else
resname = "/" + osname + "/" + System.getProperty("os.arch") + "/";
//System.out.println("platform: " + resname);
if (osname.startsWith("Windows"))
resname += "cameraserver.dll";
else if (osname.startsWith("Mac"))
resname += "libcameraserver.dylib";
else
resname += "libcameraserver.so";
InputStream is = CameraServerJNI.class.getResourceAsStream(resname);
if (is != null) {
// create temporary file
if (System.getProperty("os.name").startsWith("Windows"))
jniLibrary = File.createTempFile("NetworkTablesJNI", ".dll");
else if (System.getProperty("os.name").startsWith("Mac"))
jniLibrary = File.createTempFile("libNetworkTablesJNI", ".dylib");
else
jniLibrary = File.createTempFile("libNetworkTablesJNI", ".so");
// flag for delete on exit
jniLibrary.deleteOnExit();
OutputStream os = new FileOutputStream(jniLibrary);
byte[] buffer = new byte[1024];
int readBytes;
try {
while ((readBytes = is.read(buffer)) != -1) {
os.write(buffer, 0, readBytes);
}
} finally {
os.close();
is.close();
}
try {
System.load(jniLibrary.getAbsolutePath());
} catch (UnsatisfiedLinkError e) {
System.loadLibrary("cameraserver");
}
} else {
System.loadLibrary("cameraserver");
}
} catch (IOException ex) {
ex.printStackTrace();
System.exit(1);
}
libraryLoaded = true;
}
}
}