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1 : /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
2 : /*************************************************************************
3 : *
4 : * The Contents of this file are made available subject to the terms of
5 : * either of the following licenses
6 : *
7 : * - GNU Lesser General Public License Version 2.1
8 : * - Sun Industry Standards Source License Version 1.1
9 : *
10 : * Sun Microsystems Inc., October, 2000
11 : *
12 : * GNU Lesser General Public License Version 2.1
13 : * =============================================
14 : * Copyright 2000 by Sun Microsystems, Inc.
15 : * 901 San Antonio Road, Palo Alto, CA 94303, USA
16 : *
17 : * This library is free software; you can redistribute it and/or
18 : * modify it under the terms of the GNU Lesser General Public
19 : * License version 2.1, as published by the Free Software Foundation.
20 : *
21 : * This library is distributed in the hope that it will be useful,
22 : * but WITHOUT ANY WARRANTY; without even the implied warranty of
23 : * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
24 : * Lesser General Public License for more details.
25 : *
26 : * You should have received a copy of the GNU Lesser General Public
27 : * License along with this library; if not, write to the Free Software
28 : * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
29 : * MA 02111-1307 USA
30 : *
31 : *
32 : * Sun Industry Standards Source License Version 1.1
33 : * =================================================
34 : * The contents of this file are subject to the Sun Industry Standards
35 : * Source License Version 1.1 (the "License"); You may not use this file
36 : * except in compliance with the License. You may obtain a copy of the
37 : * License at http://www.openoffice.org/license.html.
38 : *
39 : * Software provided under this License is provided on an "AS IS" basis,
40 : * WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING,
41 : * WITHOUT LIMITATION, WARRANTIES THAT THE SOFTWARE IS FREE OF DEFECTS,
42 : * MERCHANTABLE, FIT FOR A PARTICULAR PURPOSE, OR NON-INFRINGING.
43 : * See the License for the specific provisions governing your rights and
44 : * obligations concerning the Software.
45 : *
46 : * The Initial Developer of the Original Code is: IBM Corporation
47 : *
48 : * Copyright: 2008 by IBM Corporation
49 : *
50 : * All Rights Reserved.
51 : *
52 : * Contributor(s): _______________________________________
53 : *
54 : *
55 : ************************************************************************/
56 : /*************************************************************************
57 : * @file
58 : * For LWP filter architecture prototype
59 : ************************************************************************/
60 : /*************************************************************************
61 : * Change History
62 : Jan 2005 Created
63 : ************************************************************************/
64 :
65 : #include "lwpobjhdr.hxx"
66 : #include "lwpdefs.hxx"
67 : #include "lwpfilehdr.hxx"
68 :
69 938 : LwpObjectHeader::LwpObjectHeader()
70 938 : : m_nTag(0), m_ID(), m_nSize(0), m_bCompressed(false)
71 : // m_nHeaderSize(0), m_nVersionID(0), m_nRefCount(0), m_nFlagBits(0),
72 : //m_nNextVersionOffset(0), m_nNextVersionID(0),
73 938 : {}
74 : /**
75 : * @descr read header from stream
76 : */
77 938 : bool LwpObjectHeader::Read(LwpSvStream &rStrm)
78 : {
79 938 : sal_uInt32 nVersionID = 0;
80 938 : sal_uInt32 nRefCount = 0;
81 938 : sal_uInt32 nNextVersionOffset = 0;
82 938 : sal_uInt32 nHeaderSize = 0;
83 :
84 938 : sal_Int64 nStartPos = rStrm.Tell();
85 :
86 938 : if ( LwpFileHeader::m_nFileRevision < 0x000B)
87 : {
88 6 : rStrm.ReadUInt32( m_nTag );
89 6 : m_ID.Read(&rStrm);
90 6 : rStrm.ReadUInt32( nVersionID );
91 6 : rStrm.ReadUInt32( nRefCount );
92 6 : rStrm.ReadUInt32( nNextVersionOffset );
93 :
94 6 : nHeaderSize = sizeof(m_nTag) + LwpObjectID::DiskSize()
95 : + sizeof(nVersionID)
96 : + sizeof(nRefCount)
97 : + sizeof(nNextVersionOffset)
98 12 : + sizeof(m_nSize);
99 :
100 6 : if ((m_nTag == TAG_AMI) || ( LwpFileHeader::m_nFileRevision < 0x0006))
101 : {
102 6 : sal_uInt32 nNextVersionID = 0;
103 6 : rStrm.ReadUInt32( nNextVersionID );
104 6 : nHeaderSize += sizeof(nNextVersionID);
105 : }
106 6 : rStrm.ReadUInt32( m_nSize );
107 : }
108 : else
109 : {
110 932 : sal_uInt8 nFlagBits = 0;
111 932 : sal_uInt16 VOType = 0;
112 932 : rStrm.ReadUInt16( VOType );
113 932 : rStrm.ReadUInt8( nFlagBits );
114 :
115 932 : m_nTag = static_cast<sal_uInt32>(VOType);
116 932 : m_ID.ReadIndexed(&rStrm);
117 932 : nHeaderSize = sizeof(VOType) + sizeof(nFlagBits) + m_ID.DiskSizeIndexed();
118 :
119 : sal_uInt8 tmpByte;
120 : sal_uInt16 tmpShort;
121 932 : switch (nFlagBits & VERSION_BITS)
122 : {
123 : case ONE_BYTE_VERSION:
124 18 : rStrm.ReadUInt8( tmpByte );
125 18 : nVersionID = static_cast<sal_uInt32>( tmpByte );
126 18 : nHeaderSize++;
127 18 : break;
128 :
129 : case TWO_BYTE_VERSION:
130 0 : rStrm.ReadUInt16( tmpShort );
131 0 : nVersionID = static_cast<sal_uInt32>( tmpShort );
132 0 : nHeaderSize += 2;
133 0 : break;
134 :
135 : case FOUR_BYTE_VERSION:
136 0 : rStrm.ReadUInt32( nVersionID );
137 0 : nHeaderSize += 4;
138 0 : break;
139 : case DEFAULT_VERSION: //fall through
140 : default:
141 914 : nVersionID = 2;
142 914 : break; // nothing
143 : }
144 :
145 932 : switch (nFlagBits & REFCOUNT_BITS)
146 : {
147 : case ONE_BYTE_REFCOUNT:
148 932 : rStrm.ReadUInt8( tmpByte );
149 932 : nRefCount = static_cast<sal_uInt32>( tmpByte );
150 932 : nHeaderSize++;
151 932 : break;
152 :
153 : case TWO_BYTE_REFCOUNT:
154 0 : rStrm.ReadUInt16( tmpShort );
155 0 : nRefCount = static_cast<sal_uInt32>( tmpShort );
156 0 : nHeaderSize += 2;
157 0 : break;
158 :
159 : case FOUR_BYTE_REFCOUNT: //through
160 : default:
161 0 : rStrm.ReadUInt32( nRefCount );
162 0 : nHeaderSize += 4;
163 0 : break;
164 : }
165 :
166 932 : if (nFlagBits & HAS_PREVOFFSET)
167 : {
168 0 : rStrm.ReadUInt32( nNextVersionOffset );
169 0 : nHeaderSize += 4;
170 : }
171 : else
172 932 : nNextVersionOffset = BAD_OFFSET;
173 :
174 932 : switch (nFlagBits & SIZE_BITS)
175 : {
176 : case ONE_BYTE_SIZE:
177 871 : rStrm.ReadUInt8( tmpByte );
178 871 : m_nSize = static_cast<sal_uInt32>( tmpByte );
179 871 : nHeaderSize++;
180 871 : break;
181 :
182 : case TWO_BYTE_SIZE:
183 61 : rStrm.ReadUInt16( tmpShort );
184 61 : m_nSize = static_cast<sal_uInt32>(tmpShort);
185 61 : nHeaderSize += 2;
186 61 : break;
187 :
188 : case FOUR_BYTE_SIZE: //go through
189 : default:
190 0 : rStrm.ReadUInt32( m_nSize );
191 0 : nHeaderSize += 4;
192 0 : break;
193 : }
194 :
195 932 : if (nFlagBits & DATA_COMPRESSED)
196 : {
197 925 : m_bCompressed = true;
198 : }
199 : }
200 938 : sal_Int64 nEndPos = rStrm.Tell();
201 938 : return (nStartPos + nHeaderSize == nEndPos);
202 : }
203 :
204 : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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