4  */
   5 /*
   6  * Licensed to the Apache Software Foundation (ASF) under one or more
   7  * contributor license agreements.  See the NOTICE file distributed with
   8  * this work for additional information regarding copyright ownership.
   9  * The ASF licenses this file to You under the Apache License, Version 2.0
  10  * (the "License"); you may not use this file except in compliance with
  11  * the License.  You may obtain a copy of the License at
  12  *
  13  *      http://www.apache.org/licenses/LICENSE-2.0
  14  *
  15  * Unless required by applicable law or agreed to in writing, software
  16  * distributed under the License is distributed on an "AS IS" BASIS,
  17  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  18  * See the License for the specific language governing permissions and
  19  * limitations under the License.
  20  */
  21 
  22 package com.sun.org.apache.bcel.internal.util;
  23 
  24 import java.io.*;

  25 
  26 /**
  27  * Utility class that implements a sequence of bytes which can be read
  28  * via the `readByte()' method. This is used to implement a wrapper for the
  29  * Java byte code stream to gain some more readability.
  30  *
  31  * @author  <A HREF="mailto:markus.dahm@berlin.de">M. Dahm</A>
  32  */
  33 public final class ByteSequence extends DataInputStream {
  34   private ByteArrayStream byte_stream;
  35 
  36   public ByteSequence(byte[] bytes) {



  37     super(new ByteArrayStream(bytes));
  38     byte_stream = (ByteArrayStream)in;
  39   }
  40 
  41   public final int getIndex()   { return byte_stream.getPosition(); }
  42   final  void      unreadByte() { byte_stream.unreadByte(); }







  43 
  44   private static final class ByteArrayStream extends ByteArrayInputStream {
  45     ByteArrayStream(byte[] bytes) { super(bytes); }
  46     final int  getPosition() { return pos; } // is protected in ByteArrayInputStream
  47     final void unreadByte()  { if(pos > 0) pos--; }












  48   }
  49 }

   4  */
   5 /*
   6  * Licensed to the Apache Software Foundation (ASF) under one or more
   7  * contributor license agreements.  See the NOTICE file distributed with
   8  * this work for additional information regarding copyright ownership.
   9  * The ASF licenses this file to You under the Apache License, Version 2.0
  10  * (the "License"); you may not use this file except in compliance with
  11  * the License.  You may obtain a copy of the License at
  12  *
  13  *      http://www.apache.org/licenses/LICENSE-2.0
  14  *
  15  * Unless required by applicable law or agreed to in writing, software
  16  * distributed under the License is distributed on an "AS IS" BASIS,
  17  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  18  * See the License for the specific language governing permissions and
  19  * limitations under the License.
  20  */
  21 
  22 package com.sun.org.apache.bcel.internal.util;
  23 
  24 import java.io.ByteArrayInputStream;
  25 import java.io.DataInputStream;
  26 
  27 /**
  28  * Utility class that implements a sequence of bytes which can be read
  29  * via the `readByte()' method. This is used to implement a wrapper for the
  30  * Java byte code stream to gain some more readability.
  31  *
  32  * @version $Id: ByteSequence.java 1747278 2016-06-07 17:28:43Z britter $
  33  */
  34 public final class ByteSequence extends DataInputStream {

  35 
  36     private final ByteArrayStream byteStream;
  37 
  38 
  39     public ByteSequence(final byte[] bytes) {
  40         super(new ByteArrayStream(bytes));
  41         byteStream = (ByteArrayStream) in;
  42     }
  43 
  44 
  45     public final int getIndex() {
  46         return byteStream.getPosition();
  47     }
  48 
  49 
  50     final void unreadByte() {
  51         byteStream.unreadByte();
  52     }
  53 
  54     private static final class ByteArrayStream extends ByteArrayInputStream {
  55 
  56         ByteArrayStream(final byte[] bytes) {
  57             super(bytes);
  58         }
  59 
  60         final int getPosition() {
  61             // pos is protected in ByteArrayInputStream
  62             return pos;
  63         }
  64 
  65         final void unreadByte() {
  66             if (pos > 0) {
  67                 pos--;
  68             }
  69         }
  70     }
  71 }