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1 : : /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
2 : : /*
3 : : * This file is part of the LibreOffice project.
4 : : *
5 : : * This Source Code Form is subject to the terms of the Mozilla Public
6 : : * License, v. 2.0. If a copy of the MPL was not distributed with this
7 : : * file, You can obtain one at http://mozilla.org/MPL/2.0/.
8 : : *
9 : : * This file incorporates work covered by the following license notice:
10 : : *
11 : : * Licensed to the Apache Software Foundation (ASF) under one or more
12 : : * contributor license agreements. See the NOTICE file distributed
13 : : * with this work for additional information regarding copyright
14 : : * ownership. The ASF licenses this file to you under the Apache
15 : : * License, Version 2.0 (the "License"); you may not use this file
16 : : * except in compliance with the License. You may obtain a copy of
17 : : * the License at http://www.apache.org/licenses/LICENSE-2.0 .
18 : : */
19 : :
20 : : #include <comphelper/seqstream.hxx>
21 : :
22 : : #include <memory.h> // for memcpy
23 : :
24 : : namespace comphelper
25 : : {
26 : : using namespace ::com::sun::star::lang;
27 : : using namespace ::com::sun::star::io;
28 : : using namespace ::com::sun::star::uno;
29 : : using namespace ::osl;
30 : :
31 : : //---------------------------------------------------------------------------------------------
32 : : // class SequenceInputStream
33 : : //---------------------------------------------------------------------------------------------
34 : :
35 : : //------------------------------------------------------------------
36 : 6908 : SequenceInputStream::SequenceInputStream(const ByteSequence& rData)
37 : : : m_aData(rData)
38 [ + - ][ + - ]: 6908 : , m_nPos(0)
39 : : {
40 : 6908 : }
41 : :
42 : : // checks if closed, returns available size, not mutex-protected
43 : : //------------------------------------------------------------------
44 : 9638 : inline sal_Int32 SequenceInputStream::avail()
45 : : {
46 [ - + ]: 9638 : if (m_nPos == -1)
47 [ # # ][ # # ]: 0 : throw NotConnectedException(::rtl::OUString(), *this);
48 : :
49 : 9638 : return m_aData.getLength() - m_nPos;
50 : : }
51 : :
52 : : // com::sun::star::io::XInputStream
53 : : //------------------------------------------------------------------
54 : 9638 : sal_Int32 SAL_CALL SequenceInputStream::readBytes( Sequence<sal_Int8>& aData, sal_Int32 nBytesToRead )
55 : : throw(NotConnectedException, BufferSizeExceededException,
56 : : IOException, RuntimeException)
57 : : {
58 [ + - ]: 9638 : ::osl::MutexGuard aGuard( m_aMutex );
59 : :
60 [ + - ]: 9638 : sal_Int32 nAvail = avail();
61 : :
62 [ - + ]: 9638 : if (nBytesToRead < 0)
63 [ # # ][ # # ]: 0 : throw BufferSizeExceededException(::rtl::OUString(),*this);
64 : :
65 [ + + ]: 9638 : if (nAvail < nBytesToRead)
66 : 6996 : nBytesToRead = nAvail;
67 : :
68 [ + - ]: 9638 : aData.realloc(nBytesToRead);
69 [ + - ]: 9638 : memcpy(aData.getArray(), m_aData.getConstArray() + m_nPos, nBytesToRead);
70 : 9638 : m_nPos += nBytesToRead;
71 : :
72 [ + - ]: 9638 : return nBytesToRead;
73 : : }
74 : :
75 : : //------------------------------------------------------------------
76 : 0 : sal_Int32 SAL_CALL SequenceInputStream::readSomeBytes( Sequence<sal_Int8>& aData, sal_Int32 nMaxBytesToRead )
77 : : throw(NotConnectedException, BufferSizeExceededException,
78 : : IOException, RuntimeException)
79 : : {
80 : : // all data is available at once
81 : 0 : return readBytes(aData, nMaxBytesToRead);
82 : : }
83 : :
84 : : //------------------------------------------------------------------
85 : 0 : void SAL_CALL SequenceInputStream::skipBytes( sal_Int32 nBytesToSkip )
86 : : throw(NotConnectedException, BufferSizeExceededException,
87 : : IOException, RuntimeException)
88 : : {
89 [ # # ]: 0 : ::osl::MutexGuard aGuard( m_aMutex );
90 : :
91 [ # # ]: 0 : sal_Int32 nAvail = avail();
92 : :
93 [ # # ]: 0 : if (nBytesToSkip < 0)
94 [ # # ][ # # ]: 0 : throw BufferSizeExceededException(::rtl::OUString(),*this);
95 : :
96 [ # # ]: 0 : if (nAvail < nBytesToSkip)
97 : 0 : nBytesToSkip = nAvail;
98 : :
99 [ # # ]: 0 : m_nPos += nBytesToSkip;
100 : 0 : }
101 : :
102 : : //------------------------------------------------------------------
103 : 0 : sal_Int32 SAL_CALL SequenceInputStream::available( )
104 : : throw(NotConnectedException, IOException, RuntimeException)
105 : : {
106 [ # # ]: 0 : ::osl::MutexGuard aGuard( m_aMutex );
107 : :
108 [ # # ][ # # ]: 0 : return avail();
109 : : }
110 : :
111 : : //------------------------------------------------------------------
112 : 2 : void SAL_CALL SequenceInputStream::closeInput( )
113 : : throw(NotConnectedException, IOException, RuntimeException)
114 : : {
115 [ - + ]: 2 : if (m_nPos == -1)
116 [ # # ][ # # ]: 0 : throw NotConnectedException(::rtl::OUString(), *this);
117 : :
118 : 2 : m_nPos = -1;
119 : 2 : }
120 : :
121 : 9147 : void SAL_CALL SequenceInputStream::seek( sal_Int64 location ) throw (IllegalArgumentException, IOException, RuntimeException)
122 : : {
123 [ + - ][ + - ]: 9147 : if ( location > m_aData.getLength() || location < 0 || location > SAL_MAX_INT32 )
[ - + ][ - + ]
124 [ # # ]: 0 : throw IllegalArgumentException();
125 : 9147 : m_nPos = (sal_Int32) location;
126 : 9147 : }
127 : :
128 : 0 : sal_Int64 SAL_CALL SequenceInputStream::getPosition() throw (IOException, RuntimeException)
129 : : {
130 : 0 : return m_nPos;
131 : : }
132 : :
133 : 6904 : sal_Int64 SAL_CALL SequenceInputStream::getLength( ) throw (IOException, RuntimeException)
134 : : {
135 : 6904 : return m_aData.getLength();
136 : : }
137 : :
138 : : //--------------------------------------------------------------------------
139 : 2 : OSequenceOutputStream::OSequenceOutputStream(Sequence< sal_Int8 >& _rSeq, double _nResizeFactor, sal_Int32 _nMinimumResize, sal_Int32 _nMaximumResize)
140 : : :m_rSequence(_rSeq)
141 : : ,m_nResizeFactor(_nResizeFactor)
142 : : ,m_nMinimumResize(_nMinimumResize)
143 : : ,m_nMaximumResize(_nMaximumResize)
144 : : ,m_nSize(0) // starting at position 0
145 [ + - ]: 2 : ,m_bConnected(sal_True)
146 : : {
147 : : OSL_ENSURE(m_nResizeFactor > 1, "OSequenceOutputStream::OSequenceOutputStream : invalid resize factor !");
148 : : OSL_ENSURE((m_nMaximumResize < 0) || (m_nMaximumResize > m_nMinimumResize),
149 : : "OSequenceOutputStream::OSequenceOutputStream : these limits don't make any sense !");
150 : :
151 [ - + ]: 2 : if (m_nResizeFactor <= 1)
152 : 0 : m_nResizeFactor = 1.3;
153 [ - + ][ # # ]: 2 : if ((m_nMaximumResize >= 0) && (m_nMaximumResize <= m_nMinimumResize))
154 : 0 : m_nMaximumResize = m_nMinimumResize * 2;
155 : : // this heuristic is as good as any other ... supply better parameters if you don't like it :)
156 : 2 : }
157 : :
158 : : //--------------------------------------------------------------------------
159 : 2 : void SAL_CALL OSequenceOutputStream::writeBytes( const Sequence< sal_Int8 >& _rData ) throw(NotConnectedException, BufferSizeExceededException, IOException, RuntimeException)
160 : : {
161 [ + - ]: 2 : MutexGuard aGuard(m_aMutex);
162 [ - + ]: 2 : if (!m_bConnected)
163 [ # # ]: 0 : throw NotConnectedException();
164 : :
165 : : // ensure the sequence has enoungh space left
166 [ + - ]: 2 : if (m_nSize + _rData.getLength() > m_rSequence.getLength())
167 : : {
168 : 2 : sal_Int32 nCurrentLength = m_rSequence.getLength();
169 : : sal_Int32 nNewLength = static_cast< sal_Int32 >(
170 : 2 : nCurrentLength * m_nResizeFactor);
171 : :
172 [ + - ]: 2 : if (m_nMinimumResize > nNewLength - nCurrentLength)
173 : : // we have a minimum so it's not too inefficient for small sequences and small write requests
174 : 2 : nNewLength = nCurrentLength + m_nMinimumResize;
175 : :
176 [ - + ][ # # ]: 2 : if ((m_nMaximumResize > 0) && (nNewLength - nCurrentLength > m_nMaximumResize))
177 : : // such a large step is not allowed
178 : 0 : nNewLength = nCurrentLength + m_nMaximumResize;
179 : :
180 [ - + ]: 2 : if (nNewLength < m_nSize + _rData.getLength())
181 : : { // it's not enough .... the data would not fit
182 : :
183 : : // let's take the double amount of the length of the data to be written, as the next write
184 : : // request could be as large as this one
185 : 0 : sal_Int32 nNewGrowth = _rData.getLength() * 2;
186 [ # # ][ # # ]: 0 : if ((m_nMaximumResize > 0) && (nNewGrowth > m_nMaximumResize))
187 : : { // we came to the limit, again ...
188 : 0 : nNewGrowth = m_nMaximumResize;
189 [ # # ]: 0 : if (nNewGrowth + nCurrentLength < m_nSize + _rData.getLength())
190 : : // but it would not fit if we respect the limit
191 : 0 : nNewGrowth = m_nSize + _rData.getLength() - nCurrentLength;
192 : : }
193 : 0 : nNewLength = nCurrentLength + nNewGrowth;
194 : : }
195 : :
196 : : // round it off to the next multiple of 4 ...
197 : 2 : nNewLength = (nNewLength + 3) / 4 * 4;
198 : :
199 [ + - ]: 2 : m_rSequence.realloc(nNewLength);
200 : : }
201 : :
202 : : OSL_ENSURE(m_rSequence.getLength() >= m_nSize + _rData.getLength(),
203 : : "ooops ... the realloc algorithm seems to be wrong :( !");
204 : :
205 [ + - ]: 2 : memcpy(m_rSequence.getArray() + m_nSize, _rData.getConstArray(), _rData.getLength());
206 [ + - ]: 2 : m_nSize += _rData.getLength();
207 : 2 : }
208 : :
209 : : //--------------------------------------------------------------------------
210 : 2 : void SAL_CALL OSequenceOutputStream::flush( ) throw(NotConnectedException, BufferSizeExceededException, IOException, RuntimeException)
211 : : {
212 [ + - ]: 2 : MutexGuard aGuard(m_aMutex);
213 [ - + ]: 2 : if (!m_bConnected)
214 [ # # ]: 0 : throw NotConnectedException();
215 : :
216 : : // cut the sequence to the real size
217 [ + - ][ + - ]: 2 : m_rSequence.realloc(m_nSize);
218 : 2 : }
219 : :
220 : : //--------------------------------------------------------------------------
221 : 2 : void SAL_CALL OSequenceOutputStream::closeOutput( ) throw(NotConnectedException, BufferSizeExceededException, IOException, RuntimeException)
222 : : {
223 [ + - ]: 2 : MutexGuard aGuard(m_aMutex);
224 [ - + ]: 2 : if (!m_bConnected)
225 [ # # ]: 0 : throw NotConnectedException();
226 : :
227 : : // cut the sequence to the real size
228 [ + - ]: 2 : m_rSequence.realloc(m_nSize);
229 : : // and don't allow any further accesses
230 [ + - ]: 2 : m_bConnected = sal_False;
231 : 2 : }
232 : :
233 : : } // namespace comphelper
234 : :
235 : : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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