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- /*
- * HelperUtility.java
- *
- * Copyright 2011 Thomas Buck <xythobuz@me.com>
- * Copyright 2011 Max Nuding <max.nuding@gmail.com>
- * Copyright 2011 Felix Bäder <baeder.felix@gmail.com>
- *
- * This file is part of LED-Cube.
- *
- * LED-Cube is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * LED-Cube 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 for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with LED-Cube. If not, see <http://www.gnu.org/licenses/>.
- */
-
- /**
- * Helper class which runs our native library, which is loaded from inside the Jar.
- * @author Thomas Buck
- * @author Max Nuding
- * @author Felix Bäder
- * @version 1.0
- */
-
- import java.io.*;
- import java.nio.channels.*;
- import java.nio.*;
-
- public class HelperUtility {
-
- // Load libraries, copy from Jar if needed
- // Mostly from:
- // http://stackoverflow.com/questions/1611357/how-to-make-a-jar-file-that-include-dll-files
- static {
- // System.out.println("Loading Serial Library...");
- loadFromJar();
- }
-
- /**
- * When packaged into JAR extracts DLLs, places these into
- */
- private static void loadFromJar() {
- // we need to put DLL to temp dir
- String os = System.getProperty("os.name").toLowerCase();
- String path = "CC_";
- if (os.indexOf("windows") > -1) {
- loadLib(path, "Serial.dll");
- } else if (os.indexOf("mac") > -1) {
- loadLib(path, "libSerial.jnilib");
- }
- }
-
- /**
- * Puts library to temp dir and loads to memory
- */
- private static void loadLib(String path, String name) {
- try {
- // have to use a stream
- InputStream in = HelperUtility.class.getResourceAsStream(name);
- // System.out.println("Input Stream: " + in);
- File fileOut = new File(System.getProperty("java.io.tmpdir") + "/" + path + name);
- OutputStream out = new FileOutputStream(fileOut);
- ReadableByteChannel inChannel = Channels.newChannel(in);
- WritableByteChannel outChannel = Channels.newChannel(out);
- fastChannelCopy(inChannel, outChannel);
- inChannel.close();
- outChannel.close();
- System.load(fileOut.toString());
- } catch (Exception e) {
- System.out.println("Failed to load Serial Library:");
- e.printStackTrace();
- }
- }
-
- // http://thomaswabner.wordpress.com/2007/10/09/fast-stream-copy-using-javanio-channels/
- public static void fastChannelCopy(ReadableByteChannel src, WritableByteChannel dest) throws IOException {
- ByteBuffer buffer = ByteBuffer.allocateDirect(16 * 1024);
- while (src.read(buffer) != -1) {
- // prepare the buffer to be drained
- buffer.flip();
- // write to the channel, may block
- dest.write(buffer);
- // If partial transfer, shift remainder down
- // If buffer is empty, same as doing clear()
- buffer.compact();
- }
- // EOF will leave buffer in fill state
- buffer.flip();
- // make sure the buffer is fully drained.
- while (buffer.hasRemaining()) {
- dest.write(buffer);
- }
- }
-
- /**
- * Get all the existing serial port names
- * @return List of port names. \n between entries
- */
- public static String getPorts() {
- String os = System.getProperty("os.name").toLowerCase();
- if (os.indexOf("windows") > -1) {
- return getThePorts("COM");
- } else if (os.indexOf("linux") > -1) {
- return getThePorts("tty");
- } else if (os.indexOf("mac") > -1) {
- return getThePorts("tty.");
- }
-
- // Not linux, windows or mac?
- return getThePorts("wtf?");
- }
-
- private static native String getThePorts(String search);
-
- /**
- * Open Connection to a port
- * @return TRUE if successful
- * @param name Port to open
- */
- public static native boolean openPort(String name);
-
- /**
- * Close Connection to port
- */
- public static native void closePort();
-
- /**
- * Read data from Cube
- * @param length Amount of data to read
- * @return Data read
- */
- public static native short[] readData(int length);
-
- /**
- * Write data to Cube
- * @param data Data to write
- * @param length Length of data
- */
- public static native void writeData(short[] data, int length);
- }
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