001/*
002 *  Licensed to the Apache Software Foundation (ASF) under one
003 *  or more contributor license agreements.  See the NOTICE file
004 *  distributed with this work for additional information
005 *  regarding copyright ownership.  The ASF licenses this file
006 *  to you under the Apache License, Version 2.0 (the
007 *  "License"); you may not use this file except in compliance
008 *  with the License.  You may obtain a copy of the License at
009 *  
010 *    http://www.apache.org/licenses/LICENSE-2.0
011 *  
012 *  Unless required by applicable law or agreed to in writing,
013 *  software distributed under the License is distributed on an
014 *  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
015 *  KIND, either express or implied.  See the License for the
016 *  specific language governing permissions and limitations
017 *  under the License. 
018 *  
019 */
020package org.apache.directory.api.asn1.ber.tlv;
021
022
023/**
024 * Stores the different states of a PDU parsing.
025 * 
026 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
027 */
028public enum TLVStateEnum
029{
030    /** Start means that the deconding hasn't read the first byte */
031    TAG_STATE_START,
032
033    /** Pending means that the Type Tag is contained in more that one byte */
034    TAG_STATE_PENDING,
035
036    /** End means that the Type is totally read */
037    TAG_STATE_END,
038
039    /**
040     * Overflow could have two meaning : either there are more than 5 bytes to
041     * encode the value (5 bytes = 5bits + 4*7 bits = 33 bits) or the value that
042     * is represented by those bytes is over MAX_INTEGER
043     */
044    TAG_STATE_OVERFLOW,
045
046    /** Start means that the decoding hasn't read the first byte */
047    LENGTH_STATE_START,
048
049    /** Pending means that the Type length is contained in more that one byte */
050    LENGTH_STATE_PENDING,
051
052    /** End means that the Length is totally read */
053    LENGTH_STATE_END,
054
055    /** Start means that the decoding hasn't read the first byte */
056    VALUE_STATE_START,
057
058    /** Pending means that the Type Value is contained in more that one byte */
059    VALUE_STATE_PENDING,
060
061    /** End means that the Value is totally read */
062    VALUE_STATE_END,
063
064    /** The decoding of a TLV is done */
065    TLV_STATE_DONE,
066
067    /** The decoding of a PDU is done */
068    PDU_DECODED,
069
070    /** The ending state */
071    GRAMMAR_END
072}