| /******************************************************************************* |
| * Copyright (c) 2000, 2011 QNX Software Systems 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: |
| * QNX Software Systems - Initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.cdt.utils.spawner; |
| |
| |
| import java.io.*; |
| |
| import org.eclipse.cdt.core.CCorePlugin; |
| |
| /** |
| * @noextend This class is not intended to be subclassed by clients. |
| * @noinstantiate This class is not intended to be instantiated by clients. |
| */ |
| class SpawnerInputStream extends InputStream { |
| private int fd; |
| |
| /** |
| * From a Unix valid file descriptor set a Reader. |
| * @param fd file descriptor. |
| */ |
| public SpawnerInputStream(int fd) { |
| this.fd = fd; |
| } |
| |
| /** |
| * Implementation of read for the InputStream. |
| * |
| * @exception IOException on error. |
| */ |
| @Override |
| public int read() throws IOException { |
| byte b[] = new byte[1]; |
| if (1 != read(b, 0, 1)) { |
| return -1; |
| } |
| return b[0]; |
| } |
| |
| /** |
| * @see InputStream#read(byte[], int, int) |
| */ |
| @Override |
| public int read(byte[] buf, int off, int len) throws IOException { |
| if (buf == null) { |
| throw new NullPointerException(); |
| } else if ( |
| (off < 0) |
| || (off > buf.length) |
| || (len < 0) |
| || ((off + len) > buf.length) |
| || ((off + len) < 0)) { |
| throw new IndexOutOfBoundsException(); |
| } else if (len == 0) { |
| return 0; |
| } |
| byte[] tmpBuf = off > 0 ? new byte[len] : buf; |
| |
| len = read0(fd, tmpBuf, len); |
| if (len <= 0) { |
| return -1; |
| } |
| |
| if (tmpBuf != buf) { |
| System.arraycopy(tmpBuf, 0, buf, off, len); |
| } |
| return len; |
| } |
| |
| /** |
| * Close the Reader |
| * @exception IOException on error. |
| */ |
| @Override |
| public void close() throws IOException { |
| if (fd == -1) { |
| return; |
| } |
| int status = close0(fd); |
| if (status == -1) |
| { |
| throw new IOException(CCorePlugin.getResourceString("Util.exception.closeError")); //$NON-NLS-1$ |
| } |
| fd = -1; |
| } |
| |
| @Override |
| public int available() throws IOException { |
| try { |
| return available0(fd); |
| } |
| catch (UnsatisfiedLinkError e) { |
| // for those platforms that do not implement available0 |
| return super.available(); |
| } |
| } |
| |
| @Override |
| protected void finalize() throws IOException { |
| close(); |
| } |
| |
| private native int read0(int fileDesc, byte[] buf, int len) throws IOException; |
| private native int close0(int fileDesc) throws IOException; |
| private native int available0(int fileDesc) throws IOException; |
| |
| static { |
| System.loadLibrary(Spawner.LIBRARY_NAME); |
| } |
| |
| |
| } |