diff options
Diffstat (limited to 'src/org/traccar/helper/BitBuffer.java')
-rw-r--r-- | src/org/traccar/helper/BitBuffer.java | 101 |
1 files changed, 0 insertions, 101 deletions
diff --git a/src/org/traccar/helper/BitBuffer.java b/src/org/traccar/helper/BitBuffer.java deleted file mode 100644 index ac307efdf..000000000 --- a/src/org/traccar/helper/BitBuffer.java +++ /dev/null @@ -1,101 +0,0 @@ -/* - * Copyright 2016 - 2017 Anton Tananaev (anton@traccar.org) - * - * Licensed under the Apache License, Version 2.0 (the "License"); - * you may not use this file except in compliance with the License. - * You may obtain a copy of the License at - * - * http://www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, software - * distributed under the License is distributed on an "AS IS" BASIS, - * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - * See the License for the specific language governing permissions and - * limitations under the License. - */ -package org.traccar.helper; - -import org.jboss.netty.buffer.ChannelBuffer; -import org.jboss.netty.buffer.ChannelBuffers; - -public class BitBuffer { - - private final ChannelBuffer buffer; - - private int writeByte; - private int writeCount; - - private int readByte; - private int readCount; - - public BitBuffer() { - buffer = ChannelBuffers.dynamicBuffer(); - } - - public BitBuffer(ChannelBuffer buffer) { - this.buffer = buffer; - } - - public void writeEncoded(byte[] bytes) { - for (byte b : bytes) { - b -= 48; - if (b > 40) { - b -= 8; - } - write(b); - } - } - - public void write(int b) { - if (writeCount == 0) { - writeByte |= b; - writeCount = 6; - } else { - int remaining = 8 - writeCount; - writeByte <<= remaining; - writeByte |= b >> (6 - remaining); - buffer.writeByte(writeByte); - writeByte = b & ((1 << (6 - remaining)) - 1); - writeCount = 6 - remaining; - } - } - - public int readUnsigned(int length) { - int result = 0; - - while (length > 0) { - if (readCount == 0) { - readByte = buffer.readUnsignedByte(); - readCount = 8; - } - if (readCount >= length) { - result <<= length; - result |= readByte >> (readCount - length); - readByte &= (1 << (readCount - length)) - 1; - readCount -= length; - length = 0; - } else { - result <<= readCount; - result |= readByte; - length -= readCount; - readByte = 0; - readCount = 0; - } - } - - return result; - } - - public int readSigned(int length) { - int result = readUnsigned(length); - int signBit = 1 << (length - 1); - if ((result & signBit) == 0) { - return result; - } else { - result &= signBit - 1; - result += ~(signBit - 1); - return result; - } - } - -} |