summaryrefslogtreecommitdiff
path: root/xmlhelp/source/cxxhelp/provider/inputstream.cxx
blob: 59c87cef40fcdaa197e99a9e756bf9c43e1e6b00 (plain)
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
/* -*- 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 "inputstream.hxx"

#include <com/sun/star/io/IOException.hpp>
#include <com/sun/star/lang/IllegalArgumentException.hpp>
#include <cppuhelper/queryinterface.hxx>


using namespace chelp;
using namespace com::sun::star;


XInputStream_impl::XInputStream_impl( const OUString& aUncPath )
    : m_bIsOpen( false ),
      m_aFile( aUncPath )
{
    m_bIsOpen = ( osl::FileBase::E_None == m_aFile.open( osl_File_OpenFlag_Read ) );
}

XInputStream_impl::~XInputStream_impl()
{
    if (m_bIsOpen)
        m_aFile.close();
}

uno::Any SAL_CALL
XInputStream_impl::queryInterface( const uno::Type& rType )
{
    uno::Any aRet = cppu::queryInterface( rType,
                                          static_cast< io::XInputStream* >(this),
                                          static_cast< io::XSeekable* >(this) );
    return aRet.hasValue() ? aRet : OWeakObject::queryInterface( rType );
}


void SAL_CALL
XInputStream_impl::acquire()
    noexcept
{
    OWeakObject::acquire();
}


void SAL_CALL
XInputStream_impl::release()
    noexcept
{
    OWeakObject::release();
}


sal_Int32 SAL_CALL
XInputStream_impl::readBytes(
                 uno::Sequence< sal_Int8 >& aData,
                 sal_Int32 nBytesToRead )
{
    if( ! m_bIsOpen )
        throw io::IOException();

    if (aData.getLength() < nBytesToRead)
        aData.realloc(nBytesToRead);
    //TODO! translate memory exhaustion (if it were detectable...) into
    // io::BufferSizeExceededException

    sal_uInt64 nBytesRead;
    m_aFile.read( aData.getArray(), sal_uInt64(nBytesToRead), nBytesRead );

    // Shrink aData in case we read less than nBytesToRead (XInputStream
    // documentation does not tell whether this is required, and I do not know
    // if any code relies on this, so be conservative---SB):
    if (nBytesRead != sal::static_int_cast<sal_uInt64>(nBytesToRead) )
        aData.realloc(sal_Int32(nBytesRead));
    return static_cast<sal_Int32>(nBytesRead);
}

sal_Int32 SAL_CALL
XInputStream_impl::readSomeBytes(
    uno::Sequence< sal_Int8 >& aData,
    sal_Int32 nMaxBytesToRead )
{
    return readBytes( aData,nMaxBytesToRead );
}


void SAL_CALL
XInputStream_impl::skipBytes(
    sal_Int32 nBytesToSkip )
{
    if (m_aFile.setPos(osl_Pos_Current, sal_uInt64(nBytesToSkip)) != osl::FileBase::E_None)
    {
        throw io::IOException("XInputStream_impl::skipBytes failed seek");
    }
}


sal_Int32 SAL_CALL
XInputStream_impl::available()
{
    sal_uInt64 uPos;
    if( osl::FileBase::E_None != m_aFile.getPos( uPos ) )
        throw io::IOException();
    sal_uInt64 uSize;
    if( osl::FileBase::E_None != m_aFile.getSize( uSize ) )
        throw io::IOException();
    return std::min<sal_uInt64>(SAL_MAX_INT32, uSize - uPos);
}


void SAL_CALL
XInputStream_impl::closeInput()
{
    if( m_bIsOpen )
    {
        osl::FileBase::RC err = m_aFile.close();
        if( err != osl::FileBase::E_None )
            throw io::IOException();
        m_bIsOpen = false;
    }
}


void SAL_CALL
XInputStream_impl::seek( sal_Int64 location )
{
    if( location < 0 )
        throw lang::IllegalArgumentException();
    if( osl::FileBase::E_None != m_aFile.setPos( osl_Pos_Absolut, sal_uInt64( location ) ) )
        throw io::IOException();
}


sal_Int64 SAL_CALL
XInputStream_impl::getPosition()
{
    sal_uInt64 uPos;
    if( osl::FileBase::E_None != m_aFile.getPos( uPos ) )
        throw io::IOException();
    return sal_Int64( uPos );
}

sal_Int64 SAL_CALL
XInputStream_impl::getLength()
{
    osl::FileBase::RC   err;
    sal_uInt64          uCurrentPos, uEndPos;

    err = m_aFile.getPos( uCurrentPos );
    if( err != osl::FileBase::E_None )
        throw io::IOException();

    err = m_aFile.setPos( osl_Pos_End, 0 );
    if( err != osl::FileBase::E_None )
        throw io::IOException();

    err = m_aFile.getPos( uEndPos );
    if( err != osl::FileBase::E_None )
        throw io::IOException();

    err = m_aFile.setPos( osl_Pos_Absolut, uCurrentPos );
    if( err != osl::FileBase::E_None )
        throw io::IOException();

    return sal_Int64( uEndPos );
}

/* vim:set shiftwidth=4 softtabstop=4 expandtab: */