NekoX/TMessagesProj/src/main/java/jawnae/pyronet/traffic/ByteSinkEndsWith.java

75 lines
2.9 KiB
Java
Executable File

/*
* Copyright (c) 2008, https://code.google.com/p/pyronet/
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
*
* Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.
* Neither the name of the <ORGANIZATION> nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
* OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package jawnae.pyronet.traffic;
import java.nio.ByteBuffer;
public abstract class ByteSinkEndsWith implements ByteSink {
private final ByteBuffer result;
private final byte[] endsWith;
private final boolean includeEndsWith;
private int matchCount;
private int filled;
public ByteSinkEndsWith(byte[] endsWith, int capacity,
boolean includeEndsWith) {
if (endsWith == null || endsWith.length == 0)
throw new IllegalStateException();
this.result = ByteBuffer.allocate(capacity);
this.endsWith = endsWith;
this.includeEndsWith = includeEndsWith;
this.reset();
}
@Override
public void reset() {
this.result.clear();
this.matchCount = 0;
this.filled = 0;
}
@Override
public int feed(byte b) {
if (this.endsWith[this.matchCount] == b) {
this.matchCount++;
} else {
this.matchCount = 0;
}
this.result.put(this.filled, b);
this.filled += 1;
if (this.matchCount == this.endsWith.length) {
int len = this.filled
- (this.includeEndsWith ? 0 : this.endsWith.length);
this.result.limit(len);
this.onReady(this.result);
return FEED_ACCEPTED_LAST;
}
return ByteSink.FEED_ACCEPTED;
}
}