1 files changed, 134 insertions, 0 deletions
diff --git a/src/share/classes/sun/rmi/log/LogInputStream.java b/src/share/classes/sun/rmi/log/LogInputStream.java
new file mode 100644
index 000000000..cdf6e2a1d
--- /dev/null
+++ b/src/share/classes/sun/rmi/log/LogInputStream.java
@@ -0,0 +1,134 @@
+/*
+ * Copyright 1997-1999 Sun Microsystems, Inc.  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.  Sun designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ */
+
+package sun.rmi.log;
+
+import java.io.*;
+
+public
+class LogInputStream extends InputStream {
+    private InputStream in;
+    private int length;
+
+    /**
+     * Creates a log input file with the specified system dependent
+     * file descriptor.
+     * @param fd the system dependent file descriptor
+     * @param length the total number of bytes allowed to be read
+     * @exception IOException If an I/O error has occurred.
+     */
+    public LogInputStream(InputStream in, int length) throws IOException {
+        this.in = in;
+        this.length = length;
+    }
+
+    /**
+     * Reads a byte of data. This method will block if no input is
+     * available.
+     * @return  the byte read, or -1 if the end of the log or end of the
+     *          stream is reached.
+     * @exception IOException If an I/O error has occurred.
+     */
+    public int read() throws IOException {
+        if (length == 0)
+            return -1;
+        int c = in.read();
+        length = (c != -1) ? length - 1 : 0;
+        return c;
+    }
+
+    /**
+     * Reads data into an array of bytes.
+     * This method blocks until some input is available.
+     * @param b the buffer into which the data is read
+     * @return  the actual number of bytes read, or -1 if the end of the log
+     *          or 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 data into an array of bytes.
+     * This method blocks until some input is available.
+     * @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
+     * @return  the actual number of bytes read, or -1 if the end of the log or
+     *          end of the stream is reached.
+     * @exception IOException If an I/O error has occurred.
+     */
+    public int read(byte b[], int off, int len) throws IOException {
+        if (length == 0)
+            return -1;
+        len = (length < len) ? length : len;
+        int n = in.read(b, off, len);
+        length = (n != -1) ? length - n : 0;
+        return n;
+    }
+
+    /**
+     * Skips n bytes of input.
+     * @param n the number of bytes to be skipped
+     * @return  the actual number of bytes skipped.
+     * @exception IOException If an I/O error has occurred.
+     */
+    public long skip(long n) throws IOException {
+        if (n > Integer.MAX_VALUE)
+            throw new IOException("Too many bytes to skip - " + n);
+        if (length == 0)
+            return 0;
+        n = (length < n) ? length : n;
+        n = in.skip(n);
+        length -= n;
+        return n;
+    }
+
+    /**
+     * Returns the number of bytes that can be read without blocking.
+     * @return  the number of available bytes, which is initially
+     *          equal to the file size.
+     */
+    public int available() throws IOException {
+        int avail = in.available();
+        return (length < avail) ? length : avail;
+    }
+
+    /**
+     * Closes the input stream.  No further input can be read.
+     * the stream.
+     */
+    public void close() {
+        length = 0;
+    }
+
+    /**
+     * Closes the stream when garbage is collected.
+     */
+    protected void finalize() throws IOException {
+        close();
+    }
+}