org.spearce.jgit.test/tst/org/spearce/jgit/lib/XInputStream.java

   1 /*
   2  * Copyright (C) 2008, Shawn O. Pearce <spearce@spearce.org>
   3  *
   4  * All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or
   7  * without modification, are permitted provided that the following
   8  * conditions are met:
   9  *
  10  * - Redistributions of source code must retain the above copyright
  11  *   notice, this list of conditions and the following disclaimer.
  12  *
  13  * - Redistributions in binary form must reproduce the above
  14  *   copyright notice, this list of conditions and the following
  15  *   disclaimer in the documentation and/or other materials provided
  16  *   with the distribution.
  17  *
  18  * - Neither the name of the Git Development Community nor the
  19  *   names of its contributors may be used to endorse or promote
  20  *   products derived from this software without specific prior
  21  *   written permission.
  22  *
  23  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
  24  * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
  25  * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  26  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  27  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
  28  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  29  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  30  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  31  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
  32  * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  33  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  34  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
  35  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  36  */
  37
  38 package org.spearce.jgit.lib;
  39
  40 import java.io.BufferedInputStream;
  41 import java.io.EOFException;
  42 import java.io.IOException;
  43 import java.io.InputStream;
  44
  45 import org.spearce.jgit.util.NB;
  46
  47 class XInputStream extends BufferedInputStream {
  48         private final byte[] intbuf = new byte[8];
  49
  50         XInputStream(final InputStream s) {
  51                 super(s);
  52         }
  53
  54         synchronized byte[] readFully(final int len) throws IOException {
  55                 final byte[] b = new byte[len];
  56                 readFully(b, 0, len);
  57                 return b;
  58         }
  59
  60         synchronized void readFully(final byte[] b, int o, int len)
  61                         throws IOException {
  62                 int r;
  63                 while (len > 0 && (r = read(b, o, len)) > 0) {
  64                         o += r;
  65                         len -= r;
  66                 }
  67                 if (len > 0)
  68                         throw new EOFException();
  69         }
  70
  71         int readUInt8() throws IOException {
  72                 final int r = read();
  73                 if (r < 0)
  74                         throw new EOFException();
  75                 return r;
  76         }
  77
  78         long readUInt32() throws IOException {
  79                 readFully(intbuf, 0, 4);
  80                 return NB.decodeUInt32(intbuf, 0);
  81         }
  82 }