| package org.eclipse.cdt.utils.pty; |
| |
| /* |
| * (c) Copyright QNX Software Systems Ltd. 2002. |
| * All Rights Reserved. |
| */ |
| |
| import java.io.InputStream; |
| import java.io.IOException; |
| |
| import org.eclipse.cdt.utils.pty.PTY.MasterFD; |
| |
| class PTYInputStream extends InputStream { |
| |
| MasterFD master; |
| |
| /** |
| * Fome a Unix valid file descriptor set a Reader. |
| * @param desc file descriptor. |
| */ |
| public PTYInputStream(MasterFD fd) { |
| master = fd; |
| } |
| |
| /** |
| * Implementation of read for the InputStream. |
| * |
| * @exception IOException on error. |
| */ |
| public int read() throws IOException { |
| byte b[] = new byte[1]; |
| if (1 != read(b, 0, 1)) |
| return -1; |
| return (int) b[0]; |
| } |
| |
| /** |
| * @see InputStream#read(byte[], int, int) |
| */ |
| 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 = new byte[len]; |
| |
| len = read0(master.getFD(), tmpBuf, len); |
| if (len <= 0) |
| return -1; |
| |
| System.arraycopy(tmpBuf, 0, buf, off, len); |
| return len; |
| } |
| |
| /** |
| * Close the Reader |
| * @exception IOException on error. |
| */ |
| public void close() throws IOException { |
| if (master.getFD() == -1) |
| return; |
| int status = close0(master.getFD()); |
| if (status == -1) |
| throw new IOException("close error"); |
| master.setFD(-1); |
| } |
| |
| private native int read0(int fd, byte[] buf, int len) throws IOException; |
| private native int close0(int fd) throws IOException; |
| |
| static { |
| System.loadLibrary("pty"); |
| } |
| |
| } |