1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
|
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* This file incorporates work covered by the following license notice:
*
* 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 .
*/
#include <sal/config.h>
#include <com/sun/star/io/IOException.hpp>
#include <com/sun/star/io/NotConnectedException.hpp>
#include <com/sun/star/io/TempFile.hpp>
#include <com/sun/star/io/XOutputStream.hpp>
#include <comphelper/seekableinput.hxx>
using namespace ::com::sun::star;
namespace comphelper
{
const sal_Int32 nConstBufferSize = 32000;
static void copyInputToOutput_Impl( const uno::Reference< io::XInputStream >& xIn,
const uno::Reference< io::XOutputStream >& xOut )
{
sal_Int32 nRead;
uno::Sequence< sal_Int8 > aSequence( nConstBufferSize );
do
{
nRead = xIn->readBytes( aSequence, nConstBufferSize );
if ( nRead < nConstBufferSize )
{
uno::Sequence< sal_Int8 > aTempBuf( aSequence.getConstArray(), nRead );
xOut->writeBytes( aTempBuf );
}
else
xOut->writeBytes( aSequence );
}
while ( nRead == nConstBufferSize );
}
OSeekableInputWrapper::OSeekableInputWrapper(
const uno::Reference< io::XInputStream >& xInStream,
const uno::Reference< uno::XComponentContext >& rxContext )
: m_xContext( rxContext )
, m_xOriginalStream( xInStream )
{
if ( !m_xContext.is() )
throw uno::RuntimeException();
}
OSeekableInputWrapper::~OSeekableInputWrapper()
{
}
uno::Reference< io::XInputStream > OSeekableInputWrapper::CheckSeekableCanWrap(
const uno::Reference< io::XInputStream >& xInStream,
const uno::Reference< uno::XComponentContext >& rxContext )
{
// check that the stream is seekable and just wrap it if it is not
uno::Reference< io::XSeekable > xSeek( xInStream, uno::UNO_QUERY );
if ( xSeek.is() )
return xInStream;
return new OSeekableInputWrapper(xInStream, rxContext);
}
void OSeekableInputWrapper::PrepareCopy_Impl()
{
if ( !m_xCopyInput.is() )
{
if ( !m_xContext.is() )
throw uno::RuntimeException();
uno::Reference< io::XOutputStream > xTempOut(
io::TempFile::create(m_xContext),
uno::UNO_QUERY_THROW );
copyInputToOutput_Impl( m_xOriginalStream, xTempOut );
xTempOut->closeOutput();
uno::Reference< io::XSeekable > xTempSeek( xTempOut, uno::UNO_QUERY );
if ( xTempSeek.is() )
{
xTempSeek->seek( 0 );
m_xCopyInput.set( xTempOut, uno::UNO_QUERY );
if ( m_xCopyInput.is() )
m_xCopySeek = xTempSeek;
}
}
if ( !m_xCopyInput.is() )
throw io::IOException();
}
// XInputStream
sal_Int32 SAL_CALL OSeekableInputWrapper::readBytes( uno::Sequence< sal_Int8 >& aData, sal_Int32 nBytesToRead )
{
::osl::MutexGuard aGuard( m_aMutex );
if ( !m_xOriginalStream.is() )
throw io::NotConnectedException();
PrepareCopy_Impl();
return m_xCopyInput->readBytes( aData, nBytesToRead );
}
sal_Int32 SAL_CALL OSeekableInputWrapper::readSomeBytes( uno::Sequence< sal_Int8 >& aData, sal_Int32 nMaxBytesToRead )
{
::osl::MutexGuard aGuard( m_aMutex );
if ( !m_xOriginalStream.is() )
throw io::NotConnectedException();
PrepareCopy_Impl();
return m_xCopyInput->readSomeBytes( aData, nMaxBytesToRead );
}
void SAL_CALL OSeekableInputWrapper::skipBytes( sal_Int32 nBytesToSkip )
{
::osl::MutexGuard aGuard( m_aMutex );
if ( !m_xOriginalStream.is() )
throw io::NotConnectedException();
PrepareCopy_Impl();
m_xCopyInput->skipBytes( nBytesToSkip );
}
sal_Int32 SAL_CALL OSeekableInputWrapper::available()
{
::osl::MutexGuard aGuard( m_aMutex );
if ( !m_xOriginalStream.is() )
throw io::NotConnectedException();
PrepareCopy_Impl();
return m_xCopyInput->available();
}
void SAL_CALL OSeekableInputWrapper::closeInput()
{
::osl::MutexGuard aGuard( m_aMutex );
if ( !m_xOriginalStream.is() )
throw io::NotConnectedException();
m_xOriginalStream->closeInput();
m_xOriginalStream.clear();
if ( m_xCopyInput.is() )
{
m_xCopyInput->closeInput();
m_xCopyInput.clear();
}
m_xCopySeek.clear();
}
// XSeekable
void SAL_CALL OSeekableInputWrapper::seek( sal_Int64 location )
{
::osl::MutexGuard aGuard( m_aMutex );
if ( !m_xOriginalStream.is() )
throw io::NotConnectedException();
PrepareCopy_Impl();
m_xCopySeek->seek( location );
}
sal_Int64 SAL_CALL OSeekableInputWrapper::getPosition()
{
::osl::MutexGuard aGuard( m_aMutex );
if ( !m_xOriginalStream.is() )
throw io::NotConnectedException();
PrepareCopy_Impl();
return m_xCopySeek->getPosition();
}
sal_Int64 SAL_CALL OSeekableInputWrapper::getLength()
{
::osl::MutexGuard aGuard( m_aMutex );
if ( !m_xOriginalStream.is() )
throw io::NotConnectedException();
PrepareCopy_Impl();
return m_xCopySeek->getLength();
}
} // namespace comphelper
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
|
