+package org.simgrid;
+
+import java.io.FileOutputStream;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.io.File;
+
+public final class NativeLib {
+
+ public static String getPath() {
+ String prefix = "NATIVE";
+ String os = System.getProperty("os.name");
+ String arch = System.getProperty("os.arch");
+
+ if (os.toLowerCase().startsWith("^win"))
+ os = "Windows";
+ else if (os.contains("OS X"))
+ os = "Darwin";
+
+ if (arch.matches("^i[3-6]86$"))
+ arch = "x86";
+ else if (arch.equalsIgnoreCase("amd64"))
+ arch = "x86_64";
+
+ os = os.replace(' ', '_');
+ arch = arch.replace(' ', '_');
+
+ return prefix + "/" + os + "/" + arch + "/";
+ }
+ public static void nativeInit(String name) {
+ try {
+ /* prefer the version on disk, if existing */
+ System.loadLibrary(name);
+ } catch (UnsatisfiedLinkError e) {
+ /* If not found, unpack the one bundled into the jar file and use it */
+ loadLib(name);
+ }
+ }
+
+ private static void loadLib (String name) {
+ String Path = NativeLib.getPath();
+
+ String filename=name;
+ InputStream in = NativeLib.class.getClassLoader().getResourceAsStream(Path+filename);
+
+ if (in == null) {
+ filename = "lib"+name+".so";
+ in = NativeLib.class.getClassLoader().getResourceAsStream(Path+filename);
+ }
+ if (in == null) {
+ filename = name+".dll";
+ in = NativeLib.class.getClassLoader().getResourceAsStream(Path+filename);
+ }
+ if (in == null) {
+ filename = "lib"+name+".dll";
+ in = NativeLib.class.getClassLoader().getResourceAsStream(Path+filename);
+ }
+ if (in == null) {
+ filename = "lib"+name+".dylib";
+ in = NativeLib.class.getClassLoader().getResourceAsStream(Path+filename);
+ }
+ if (in == null) {
+ throw new RuntimeException("Cannot find library "+name+" in path "+Path+". Sorry, but this jar does not seem to be usable on your machine.");
+ }
+ try {
+ // We must write the lib onto the disk before loading it -- stupid operating systems
+ File fileOut = new File(filename);
+ fileOut = File.createTempFile(name+"-", ".tmp");
+ // don't leak the file on disk, but remove it on JVM shutdown
+ Runtime.getRuntime().addShutdownHook(new Thread(new FileCleaner(fileOut.getAbsolutePath())));
+ OutputStream out = new FileOutputStream(fileOut);
+
+ /* copy the library in position */
+ byte[] buffer = new byte[4096];
+ int bytes_read;
+ while ((bytes_read = in.read(buffer)) != -1) // Read until EOF
+ out.write(buffer, 0, bytes_read);
+
+ /* close all file descriptors, and load that shit */
+ in.close();
+ out.close();
+ System.load(fileOut.getAbsolutePath());
+
+ } catch (Exception e) {
+ System.err.println("Cannot load the bindings to the "+name+" library: ");
+ e.printStackTrace();
+ System.err.println("This jar file does not seem to fit your system, sorry");
+ System.exit(1);
+ }
+ }
+
+ /* A hackish mechanism used to remove the file containing our library when the JVM shuts down */
+ private static class FileCleaner implements Runnable {
+ private String target;
+ public FileCleaner(String name) {
+ target = name;
+ }
+ public void run() {
+ try {
+ new File(target).delete();
+ } catch(Exception e) {
+ System.out.println("Unable to clean temporary file "+target+" during shutdown.");
+ e.printStackTrace();
+ }
+ }
+ }
+
+
+ public static void main(String[] args) {
+ System.out.println(getPath());
+ }
+}
