| /* |
| * Copyright (C) 2009 The Android Open Source Project |
| * |
| * 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. |
| */ |
| |
| package com.android.archquery; |
| |
| /** |
| * Java command line tool to return the CPU architecture of the host java VM. |
| * |
| * The goal is to be able to launch SWT based applications (DDMS, Traceview, Android) on any |
| * type of OS. |
| * |
| * Because a 64 bit OS can run a 32 bit Virtual Machine, we need to query the VM itself to know |
| * whether it's 32 or 64 bit to detect which swt.jar it should use (it contains native libraries). |
| * Simply querying the OS is not enough. |
| * |
| * The other problem is that once a VM is launched it is impossible to change its classpath to |
| * point the VM to the correct version of swt.jar. |
| * |
| * The solution is this small command line tool, running in the VM, and returning the value of |
| * the 'os.arch' property. Based on the returned value, the script launching the SWT based |
| * applications will configure the Java VM with the path to the correct swt.jar |
| * |
| * Because different VMs return different values for 32 and 64 bit version of x86 CPUs, the program |
| * handles all the possible values and normalize the returned value. |
| * |
| * At this time, the normalized values are: |
| * x86: 32 bit x86 |
| * x86_64: 64 bit x86 |
| * ppc: PowerPC (WARNING: the SDK doesn't actually support this architecture). |
| * |
| * |
| */ |
| public final class Main { |
| public static void main(String[] args) { |
| |
| for (String arg : args) { |
| System.out.println(System.getProperty(arg)); |
| } |
| |
| if (args.length == 0) { |
| // Values listed from http://lopica.sourceforge.net/os.html |
| String arch = System.getProperty("os.arch"); |
| |
| if (arch.equalsIgnoreCase("x86_64") || arch.equalsIgnoreCase("amd64")) { |
| System.out.print("x86_64"); |
| |
| } else if (arch.equalsIgnoreCase("x86") |
| || arch.equalsIgnoreCase("i386") |
| || arch.equalsIgnoreCase("i686")) { |
| System.out.print("x86"); |
| |
| } else if (arch.equalsIgnoreCase("ppc") || arch.equalsIgnoreCase("PowerPC")) { |
| System.out.print("ppc"); |
| } else { |
| System.out.print(arch); |
| } |
| } |
| } |
| } |