8187443: Forest Consolidation: Move files to unified layout

Reviewed-by: darcy, ihse

src/java.base/share/classes/java/net/SocketInputStream.java

@@ -0,0 +1,293 @@
+/*
+ * Copyright (c) 1995, 2017, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code 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
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package java.net;
+
+import java.io.FileDescriptor;
+import java.io.FileInputStream;
+import java.io.IOException;
+import java.nio.channels.FileChannel;
+
+import sun.net.ConnectionResetException;
+
+/**
+ * This stream extends FileInputStream to implement a
+ * SocketInputStream. Note that this class should <b>NOT</b> be
+ * public.
+ *
+ * @author      Jonathan Payne
+ * @author      Arthur van Hoff
+ */
+class SocketInputStream extends FileInputStream
+{
+    static {
+        init();
+    }
+
+    private boolean eof;
+    private AbstractPlainSocketImpl impl = null;
+    private byte temp[];
+    private Socket socket = null;
+
+    /**
+     * Creates a new SocketInputStream. Can only be called
+     * by a Socket. This method needs to hang on to the owner Socket so
+     * that the fd will not be closed.
+     * @param impl the implemented socket input stream
+     */
+    SocketInputStream(AbstractPlainSocketImpl impl) throws IOException {
+        super(impl.getFileDescriptor());
+        this.impl = impl;
+        socket = impl.getSocket();
+    }
+
+    /**
+     * Returns the unique {@link java.nio.channels.FileChannel FileChannel}
+     * object associated with this file input stream.</p>
+     *
+     * The {@code getChannel} method of {@code SocketInputStream}
+     * returns {@code null} since it is a socket based stream.</p>
+     *
+     * @return  the file channel associated with this file input stream
+     *
+     * @since 1.4
+     * @spec JSR-51
+     */
+    public final FileChannel getChannel() {
+        return null;
+    }
+
+    /**
+     * Reads into an array of bytes at the specified offset using
+     * the received socket primitive.
+     * @param fd the FileDescriptor
+     * @param b the buffer into which the data is read
+     * @param off the start offset of the data
+     * @param len the maximum number of bytes read
+     * @param timeout the read timeout in ms
+     * @return the actual number of bytes read, -1 is
+     *          returned when the end of the stream is reached.
+     * @exception IOException If an I/O error has occurred.
+     */
+    private native int socketRead0(FileDescriptor fd,
+                                   byte b[], int off, int len,
+                                   int timeout)
+        throws IOException;
+
+    // wrap native call to allow instrumentation
+    /**
+     * Reads into an array of bytes at the specified offset using
+     * the received socket primitive.
+     * @param fd the FileDescriptor
+     * @param b the buffer into which the data is read
+     * @param off the start offset of the data
+     * @param len the maximum number of bytes read
+     * @param timeout the read timeout in ms
+     * @return the actual number of bytes read, -1 is
+     *          returned when the end of the stream is reached.
+     * @exception IOException If an I/O error has occurred.
+     */
+    private int socketRead(FileDescriptor fd,
+                           byte b[], int off, int len,
+                           int timeout)
+        throws IOException {
+        return socketRead0(fd, b, off, len, timeout);
+    }
+
+    /**
+     * Reads into a byte array data from the socket.
+     * @param b the buffer into which the data is read
+     * @return the actual number of bytes read, -1 is
+     *          returned when the end of the stream is reached.
+     * @exception IOException If an I/O error has occurred.
+     */
+    public int read(byte b[]) throws IOException {
+        return read(b, 0, b.length);
+    }
+
+    /**
+     * Reads into a byte array <i>b</i> at offset <i>off</i>,
+     * <i>length</i> bytes of data.
+     * @param b the buffer into which the data is read
+     * @param off the start offset of the data
+     * @param length the maximum number of bytes read
+     * @return the actual number of bytes read, -1 is
+     *          returned when the end of the stream is reached.
+     * @exception IOException If an I/O error has occurred.
+     */
+    public int read(byte b[], int off, int length) throws IOException {
+        return read(b, off, length, impl.getTimeout());
+    }
+
+    int read(byte b[], int off, int length, int timeout) throws IOException {
+        int n;
+
+        // EOF already encountered
+        if (eof) {
+            return -1;
+        }
+
+        // connection reset
+        if (impl.isConnectionReset()) {
+            throw new SocketException("Connection reset");
+        }
+
+        // bounds check
+        if (length <= 0 || off < 0 || length > b.length - off) {
+            if (length == 0) {
+                return 0;
+            }
+            throw new ArrayIndexOutOfBoundsException("length == " + length
+                    + " off == " + off + " buffer length == " + b.length);
+        }
+
+        boolean gotReset = false;
+
+        // acquire file descriptor and do the read
+        FileDescriptor fd = impl.acquireFD();
+        try {
+            n = socketRead(fd, b, off, length, timeout);
+            if (n > 0) {
+                return n;
+            }
+        } catch (ConnectionResetException rstExc) {
+            gotReset = true;
+        } finally {
+            impl.releaseFD();
+        }
+
+        /*
+         * We receive a "connection reset" but there may be bytes still
+         * buffered on the socket
+         */
+        if (gotReset) {
+            impl.setConnectionResetPending();
+            impl.acquireFD();
+            try {
+                n = socketRead(fd, b, off, length, timeout);
+                if (n > 0) {
+                    return n;
+                }
+            } catch (ConnectionResetException rstExc) {
+            } finally {
+                impl.releaseFD();
+            }
+        }
+
+        /*
+         * If we get here we are at EOF, the socket has been closed,
+         * or the connection has been reset.
+         */
+        if (impl.isClosedOrPending()) {
+            throw new SocketException("Socket closed");
+        }
+        if (impl.isConnectionResetPending()) {
+            impl.setConnectionReset();
+        }
+        if (impl.isConnectionReset()) {
+            throw new SocketException("Connection reset");
+        }
+        eof = true;
+        return -1;
+    }
+
+    /**
+     * Reads a single byte from the socket.
+     */
+    public int read() throws IOException {
+        if (eof) {
+            return -1;
+        }
+        temp = new byte[1];
+        int n = read(temp, 0, 1);
+        if (n <= 0) {
+            return -1;
+        }
+        return temp[0] & 0xff;
+    }
+
+    /**
+     * Skips n bytes of input.
+     * @param numbytes the number of bytes to skip
+     * @return  the actual number of bytes skipped.
+     * @exception IOException If an I/O error has occurred.
+     */
+    public long skip(long numbytes) throws IOException {
+        if (numbytes <= 0) {
+            return 0;
+        }
+        long n = numbytes;
+        int buflen = (int) Math.min(1024, n);
+        byte data[] = new byte[buflen];
+        while (n > 0) {
+            int r = read(data, 0, (int) Math.min((long) buflen, n));
+            if (r < 0) {
+                break;
+            }
+            n -= r;
+        }
+        return numbytes - n;
+    }
+
+    /**
+     * Returns the number of bytes that can be read without blocking.
+     * @return the number of immediately available bytes
+     */
+    public int available() throws IOException {
+        return impl.available();
+    }
+
+    /**
+     * Closes the stream.
+     */
+    private boolean closing = false;
+    public void close() throws IOException {
+        // Prevent recursion. See BugId 4484411
+        if (closing)
+            return;
+        closing = true;
+        if (socket != null) {
+            if (!socket.isClosed())
+                socket.close();
+        } else
+            impl.close();
+        closing = false;
+    }
+
+    void setEOF(boolean eof) {
+        this.eof = eof;
+    }
+
+    /**
+     * Overrides finalize, the fd is closed by the Socket.
+     */
+    @SuppressWarnings("deprecation")
+    protected void finalize() {}
+
+    /**
+     * Perform class load-time initializations.
+     */
+    private static native void init();
+}