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/*******************************************************************************
* Copyright (c) 2000, 2006 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.swt.internal;
import java.io.*;
public class Library {
/* SWT Version - Mmmm (M=major, mmm=minor) */
/**
* SWT Major version number (must be >= 0)
*/
static int MAJOR_VERSION = 3;
/**
* SWT Minor version number (must be in the range 0..999)
*/
static int MINOR_VERSION = 320;
/**
* SWT revision number (must be >= 0)
*/
static int REVISION = 0;
/**
* The JAVA and SWT versions
*/
public static final int JAVA_VERSION, SWT_VERSION;
static final String SEPARATOR;
static {
SEPARATOR = System.getProperty("file.separator");
JAVA_VERSION = parseVersion(System.getProperty("java.version"));
SWT_VERSION = SWT_VERSION(MAJOR_VERSION, MINOR_VERSION);
}
static int parseVersion(String version) {
if (version == null) return 0;
int major = 0, minor = 0, micro = 0;
int length = version.length(), index = 0, start = 0;
while (index < length && Character.isDigit(version.charAt(index))) index++;
try {
if (start < length) major = Integer.parseInt(version.substring(start, index));
} catch (NumberFormatException e) {}
start = ++index;
while (index < length && Character.isDigit(version.charAt(index))) index++;
try {
if (start < length) minor = Integer.parseInt(version.substring(start, index));
} catch (NumberFormatException e) {}
start = ++index;
while (index < length && Character.isDigit(version.charAt(index))) index++;
try {
if (start < length) micro = Integer.parseInt(version.substring(start, index));
} catch (NumberFormatException e) {}
return JAVA_VERSION(major, minor, micro);
}
/**
* Returns the Java version number as an integer.
*
* @param major
* @param minor
* @param micro
* @return the version
*/
public static int JAVA_VERSION (int major, int minor, int micro) {
return (major << 16) + (minor << 8) + micro;
}
/**
* Returns the SWT version number as an integer.
*
* @param major
* @param minor
* @return the version
*/
public static int SWT_VERSION (int major, int minor) {
return major * 1000 + minor;
}
static boolean extract (String fileName, String mappedName) {
FileOutputStream os = null;
InputStream is = null;
File file = new File(fileName);
try {
if (!file.exists ()) {
is = Library.class.getResourceAsStream ("/" + mappedName); //$NON-NLS-1$
if (is != null) {
int read;
byte [] buffer = new byte [4096];
os = new FileOutputStream (fileName);
while ((read = is.read (buffer)) != -1) {
os.write(buffer, 0, read);
}
os.close ();
is.close ();
if (!Platform.PLATFORM.equals ("win32")) { //$NON-NLS-1$
try {
Runtime.getRuntime ().exec (new String []{"chmod", "755", fileName}).waitFor(); //$NON-NLS-1$ //$NON-NLS-2$
} catch (Throwable e) {}
}
if (load (fileName)) return true;
}
}
} catch (Throwable e) {
try {
if (os != null) os.close ();
} catch (IOException e1) {}
try {
if (is != null) is.close ();
} catch (IOException e1) {}
}
if (file.exists ()) file.delete ();
return false;
}
static boolean load (String libName) {
try {
if (libName.indexOf (SEPARATOR) != -1) {
System.load (libName);
} else {
System.loadLibrary (libName);
}
return true;
} catch (UnsatisfiedLinkError e) {}
return false;
}
/**
* Loads the shared library that matches the version of the
* Java code which is currently running. SWT shared libraries
* follow an encoding scheme where the major, minor and revision
* numbers are embedded in the library name and this along with
* <code>name</code> is used to load the library. If this fails,
* <code>name</code> is used in another attempt to load the library,
* this time ignoring the SWT version encoding scheme.
*
* @param name the name of the library to load
*/
public static void loadLibrary (String name) {
/*
* Include platform name to support different windowing systems
* on same operating system.
*/
String platform = Platform.PLATFORM;
/*
* Get version qualifier.
*/
String version = System.getProperty ("swt.version"); //$NON-NLS-1$
if (version == null) {
version = "" + MAJOR_VERSION; //$NON-NLS-1$
/* Force 3 digits in minor version number */
if (MINOR_VERSION < 10) {
version += "00"; //$NON-NLS-1$
} else {
if (MINOR_VERSION < 100) version += "0"; //$NON-NLS-1$
}
version += MINOR_VERSION;
/* No "r" until first revision */
if (REVISION > 0) version += "r" + REVISION; //$NON-NLS-1$
}
String libName1 = name + "-" + platform + "-" + version; //$NON-NLS-1$ //$NON-NLS-2$
String libName2 = name + "-" + platform; //$NON-NLS-1$
String mappedName1 = System.mapLibraryName (libName1);
String mappedName2 = System.mapLibraryName (libName2);
/* Try loading library from swt library path */
String path = System.getProperty ("swt.library.path"); //$NON-NLS-1$
if (path != null) {
path = new File (path).getAbsolutePath ();
if (load (path + SEPARATOR + mappedName1)) return;
if (load (path + SEPARATOR + mappedName2)) return;
}
/* Try loading library from java library path */
if (load (libName1)) return;
if (load (libName2)) return;
/* Try loading library from the tmp directory if swt library path is not specified */
if (path == null) {
path = System.getProperty ("java.io.tmpdir"); //$NON-NLS-1$
path = new File (path).getAbsolutePath ();
if (load (path + SEPARATOR + mappedName1)) return;
if (load (path + SEPARATOR + mappedName2)) return;
}
/* Try extracting and loading library from jar */
if (path != null) {
if (extract (path + SEPARATOR + mappedName1, mappedName1)) return;
if (extract (path + SEPARATOR + mappedName2, mappedName2)) return;
}
/* Failed to find the library */
throw new UnsatisfiedLinkError ("no " + libName1 + " or " + libName2 + " in swt.library.path, java.libary.path or the jar file"); //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$
}
}
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