Imported GNU Classpath 0.19 + gcj-import-20051115.

* sources.am: Regenerated. * Makefile.in: Likewise. * scripts/makemake.tcl: Use glob -nocomplain. From-SVN: r107049
2005-11-15 23:20:01 +00:00
parent 02e549bfaa
commit 8f523f3a10
1241 changed files with 97711 additions and 25284 deletions
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+/* LimitedLengthInputStream.java --
+   Copyright (C) 2005 Free Software Foundation, Inc.
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+ 
+GNU Classpath 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 for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING.  If not, write to the
+Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library.  Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module.  An independent module is a module which is not derived from
+or based on this library.  If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so.  If you do not wish to do so, delete this
+exception statement from your version. */
+
+
+package gnu.java.net.protocol.http;
+
+import java.io.IOException;
+import java.io.InputStream;
+
+/**
+ * InputStream that limits the total number of bytes that can be read
+ * from an underlying stream.  In addition to limiting the number of
+ * bytes read, close() is not propagated to the underlying stream.
+ *
+ * @author David Daney (ddaney@avtrex.com)
+ */
+class LimitedLengthInputStream
+  extends InputStream
+{
+  private long remainingLen;
+  private boolean restrictLen;
+  private HTTPConnection connection;
+  private boolean eof;
+  private InputStream in;
+  private boolean doClose;
+  
+  
+  private void handleClose()
+    throws IOException
+  {
+    eof = true;
+    if (doClose)
+      {
+        in.close();
+      }
+    else
+      {
+        connection.release();
+      }
+    in = null;
+    connection = null;
+  }
+
+  /**
+   * Constructor.
+   *
+   * @param in the underlying stream
+   *
+   * @param maxLen the maximum number of bytes to read
+   *
+   * @param restrictLen if true the number of bytes that can be read
+   * from this stream will be limited to maxLen, otherwise the number
+   * of bytes is not restricted.
+   * 
+   * @param con the HTTPConnection associated with this stream
+   *
+   * @param doClose if true con will be closed when finished reading,
+   * else it will be placed back in the connection pool.
+   *
+   */
+  LimitedLengthInputStream(InputStream in,
+                           long maxLen,
+                           boolean restrictLen,
+                           HTTPConnection con,
+                           boolean doClose)
+    throws IOException
+
+  {
+    this.in = in;
+    this.remainingLen = maxLen;
+    this.restrictLen = restrictLen;
+    this.connection = con;
+    this.doClose = doClose;
+
+    if (restrictLen)
+      {
+        if (maxLen < 0)
+          throw new IllegalArgumentException();
+        else if (maxLen == 0)
+          handleClose(); // Nothing to do, release the connection.
+      }
+  }
+
+  public synchronized int read()
+    throws IOException
+  {
+    if (eof)
+      return -1; // EOF
+
+    int r;
+    
+    if (restrictLen)
+      {
+        r = in.read();
+        if (-1 != r)
+          remainingLen--;
+
+        if (0 == remainingLen)
+          handleClose();
+      }
+    else
+      {
+        r = in.read();
+        if (r == -1)
+          handleClose();
+      }
+    
+    return r;
+  }
+
+  public int read(byte[] buffer)
+    throws IOException
+  {
+    return read(buffer, 0, buffer.length);
+  }
+
+  public synchronized int read(byte[] buffer, int offset, int length)
+    throws IOException
+  {
+    if (eof)
+      return -1; // EOF
+
+    if (restrictLen && length > remainingLen)
+      length = (int) remainingLen;
+      
+    int r = in.read(buffer, offset, length);
+    
+    if (-1 == r)
+      handleClose();
+    
+    if (restrictLen && r > 0)
+      {
+        remainingLen -= r;
+        if (0 == remainingLen)
+          handleClose();
+      }
+    return r;
+  }
+
+  public synchronized long skip(long n)
+    throws IOException
+  {
+
+    if (eof)
+      return 0;
+
+    if (restrictLen && n > remainingLen)
+      n = remainingLen;
+
+    long r = in.skip(n);
+    
+    if (restrictLen)
+      {
+        remainingLen -= r;
+        if (0 == remainingLen)
+          handleClose();
+      }
+    return r;
+  }
+
+  public synchronized int available()
+    throws IOException
+  {
+    if (eof)
+      return 0;
+
+    int a = in.available();
+    if (restrictLen && a > remainingLen)
+      a = (int)remainingLen;
+    return a;
+  }
+
+  public synchronized void close()
+    throws IOException
+  {
+    if (eof)
+      return;
+
+    // If we get to here, the stream was not fully read.  Just throw
+    // it away.
+
+    doClose = true;
+    
+    handleClose();
+  }
+}