| // Licensed to the Apache Software Foundation (ASF) under one |
| // or more contributor license agreements. See the NOTICE file |
| // distributed with this work for additional information |
| // regarding copyright ownership. The ASF licenses this file |
| // to you 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 common.asn1; |
| |
| import streamer.ByteBuffer; |
| |
| /** |
| * Variable length integer. |
| */ |
| public class Asn1Integer extends Tag { |
| |
| public Long value = null; |
| |
| public Asn1Integer(String name) { |
| super(name); |
| tagType = INTEGER; |
| } |
| |
| @Override |
| public void readTagValue(ByteBuffer buf, BerType typeAndFlags) { |
| // Type is already read by parent parser |
| |
| long length = buf.readBerLength(); |
| if (length > 8) |
| throw new RuntimeException("[" + this + "] ERROR: Integer value is too long: " + length + " bytes. Cannot handle integers more than 8 bytes long. Data: " |
| + buf + "."); |
| |
| value = buf.readSignedVarInt((int)length); |
| } |
| |
| @Override |
| public Tag deepCopy(String suffix) { |
| return new Asn1Integer(name + suffix).copyFrom(this); |
| } |
| |
| @Override |
| public Tag copyFrom(Tag tag) { |
| super.copyFrom(tag); |
| value = ((Asn1Integer)tag).value; |
| return this; |
| } |
| |
| @Override |
| public String toString() { |
| return super.toString() + "= " + value; |
| } |
| |
| @Override |
| public long calculateLengthOfValuePayload() { |
| if (value <= 0xff) |
| return 1; |
| if (value <= 0xffFF) |
| return 2; |
| if (value <= 0xffFFff) |
| return 3; |
| if (value <= 0xffFFffFFL) |
| return 4; |
| if (value <= 0xffFFffFFffL) |
| return 5; |
| if (value <= 0xffFFffFFffFFL) |
| return 6; |
| if (value <= 0xffFFffFFffFFffL) |
| return 7; |
| |
| return 8; |
| } |
| |
| @Override |
| public void writeTagValuePayload(ByteBuffer buf) { |
| long value = this.value.longValue(); |
| |
| if (value < 0xff) { |
| buf.writeByte((int)value); |
| } else if (value <= 0xffFF) { |
| buf.writeShort((int)value); |
| } else if (value <= 0xffFFff) { |
| buf.writeByte((int)(value >> 16)); |
| buf.writeShort((int)value); |
| } else if (value <= 0xffFFffFFL) { |
| buf.writeInt((int)value); |
| } else if (value <= 0xffFFffFFffL) { |
| buf.writeByte((int)(value >> 32)); |
| buf.writeInt((int)value); |
| } else if (value <= 0xffFFffFFffFFL) { |
| buf.writeShort((int)(value >> 32)); |
| buf.writeInt((int)value); |
| } else if (value <= 0xffFFffFFffFFffL) { |
| buf.writeByte((int)(value >> (32 + 16))); |
| buf.writeShort((int)(value >> 32)); |
| buf.writeInt((int)value); |
| } else { |
| buf.writeInt((int)(value >> 32)); |
| buf.writeInt((int)value); |
| } |
| } |
| |
| @Override |
| public boolean isValueSet() { |
| return value != null; |
| } |
| |
| } |