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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 : : #ifndef _COMPHELPER_SEQSTREAM_HXX
20 : : #define _COMPHELPER_SEQSTREAM_HXX
21 : :
22 : : #include <com/sun/star/uno/Sequence.hxx>
23 : : #include <com/sun/star/uno/Reference.hxx>
24 : : #include <com/sun/star/io/XInputStream.hpp>
25 : : #include <com/sun/star/io/XOutputStream.hpp>
26 : : #include <com/sun/star/io/XSeekable.hpp>
27 : : #include <osl/mutex.hxx>
28 : : #include <cppuhelper/implbase1.hxx>
29 : : #include <cppuhelper/implbase2.hxx>
30 : : #include "comphelper/comphelperdllapi.h"
31 : :
32 : : namespace comphelper
33 : : {
34 : :
35 : : typedef ::com::sun::star::uno::Sequence<sal_Int8> ByteSequence;
36 : :
37 : : //==================================================================
38 : : // SequenceInputStream
39 : : // stream for reading data from a sequence of bytes
40 : : //==================================================================
41 : :
42 : :
43 [ + - ][ + - ]: 13816 : class COMPHELPER_DLLPUBLIC SequenceInputStream
[ - + ]
44 : : : public ::cppu::WeakImplHelper2< ::com::sun::star::io::XInputStream, ::com::sun::star::io::XSeekable >
45 : : {
46 : : ::osl::Mutex m_aMutex;
47 : : ByteSequence m_aData;
48 : : sal_Int32 m_nPos;
49 : :
50 : : public:
51 : : SequenceInputStream(const ByteSequence& rData);
52 : :
53 : : // com::sun::star::io::XInputStream
54 : : virtual sal_Int32 SAL_CALL readBytes( ::com::sun::star::uno::Sequence<sal_Int8>& aData, sal_Int32 nBytesToRead )
55 : : throw(::com::sun::star::io::NotConnectedException, ::com::sun::star::io::BufferSizeExceededException,
56 : : ::com::sun::star::io::IOException, ::com::sun::star::uno::RuntimeException);
57 : :
58 : : virtual sal_Int32 SAL_CALL readSomeBytes( ::com::sun::star::uno::Sequence<sal_Int8>& aData, sal_Int32 nMaxBytesToRead )
59 : : throw(::com::sun::star::io::NotConnectedException, ::com::sun::star::io::BufferSizeExceededException,
60 : : ::com::sun::star::io::IOException, ::com::sun::star::uno::RuntimeException);
61 : :
62 : : virtual void SAL_CALL skipBytes( sal_Int32 nBytesToSkip )
63 : : throw(::com::sun::star::io::NotConnectedException, ::com::sun::star::io::BufferSizeExceededException,
64 : : ::com::sun::star::io::IOException, ::com::sun::star::uno::RuntimeException);
65 : :
66 : : virtual sal_Int32 SAL_CALL available( )
67 : : throw(::com::sun::star::io::NotConnectedException, ::com::sun::star::io::IOException, ::com::sun::star::uno::RuntimeException);
68 : :
69 : : virtual void SAL_CALL closeInput( )
70 : : throw(::com::sun::star::io::NotConnectedException, ::com::sun::star::io::IOException, ::com::sun::star::uno::RuntimeException);
71 : :
72 : : virtual void SAL_CALL seek( sal_Int64 location ) throw (::com::sun::star::lang::IllegalArgumentException, ::com::sun::star::io::IOException, ::com::sun::star::uno::RuntimeException);
73 : : virtual sal_Int64 SAL_CALL getPosition( ) throw (::com::sun::star::io::IOException, ::com::sun::star::uno::RuntimeException);
74 : : virtual sal_Int64 SAL_CALL getLength( ) throw (::com::sun::star::io::IOException, ::com::sun::star::uno::RuntimeException);
75 : :
76 : : private:
77 : : inline sal_Int32 avail();
78 : : };
79 : : typedef ::cppu::WeakImplHelper1< ::com::sun::star::io::XOutputStream > OSequenceOutputStream_Base;
80 : :
81 : : class OSequenceOutputStream : public OSequenceOutputStream_Base
82 : : {
83 : : protected:
84 : : ::com::sun::star::uno::Sequence< sal_Int8 >& m_rSequence;
85 : : double m_nResizeFactor;
86 : : sal_Int32 m_nMinimumResize;
87 : : sal_Int32 m_nMaximumResize;
88 : : sal_Int32 m_nSize;
89 : : // the size of the virtual stream. This is not the size of the sequence, but the number of bytes written
90 : : // into the stream at a given moment.
91 : :
92 : : sal_Bool m_bConnected;
93 : : // closeOutput has been called ?
94 : :
95 : : ::osl::Mutex m_aMutex;
96 : :
97 : : protected:
98 [ - + ][ # # ]: 4 : ~OSequenceOutputStream() { if (m_bConnected) closeOutput(); }
[ + - ][ - + ]
99 : :
100 : : public:
101 : : /** constructs the object. Everything written into the stream through the XOutputStream methods will be forwarded
102 : : to the sequence, reallocating it if neccessary. Writing will start at offset 0 within the sequence.
103 : : @param _rSeq a reference to the sequence which will be used for output.
104 : : The caller is responsible for taking care of the lifetime of the stream
105 : : object and the sequence. If you're in doubt about this, use <code>closeOutput</code>
106 : : before destroying the sequence
107 : : @param _nResizeFactor the factor which is used for resizing the sequence when neccessary. In every
108 : : resize step, the new sequence size will be calculated by multiplying the current
109 : : size with this factor, rounded off to the next multiple of 4.
110 : : @param _nMinimumResize the minmal number of bytes which is additionally allocated on resizing
111 : : @param _nMaximumResize as the growth of the stream size is exponential, you may want to specify a
112 : : maxmimum amount of memory which the sequence will grow by. If -1 is used,
113 : : no limit is applied
114 : : @see closeOutput
115 : : */
116 : : OSequenceOutputStream(
117 : : ::com::sun::star::uno::Sequence< sal_Int8 >& _rSeq,
118 : : double _nResizeFactor = 1.3,
119 : : sal_Int32 _nMinimumResize = 128,
120 : : sal_Int32 _nMaximumResize = -1
121 : : );
122 : :
123 : : /// same as XOutputStream::writeBytes (as expected :)
124 : : virtual void SAL_CALL writeBytes( const ::com::sun::star::uno::Sequence< sal_Int8 >& aData ) throw(::com::sun::star::io::NotConnectedException, ::com::sun::star::io::BufferSizeExceededException, ::com::sun::star::io::IOException, ::com::sun::star::uno::RuntimeException);
125 : : /// this is a dummy in this implementation, no buffering is used
126 : : virtual void SAL_CALL flush( ) throw(::com::sun::star::io::NotConnectedException, ::com::sun::star::io::BufferSizeExceededException, ::com::sun::star::io::IOException, ::com::sun::star::uno::RuntimeException);
127 : : /** closes the output stream. In the case of this class, this means that the sequence used for writing is
128 : : resized to the really used size and not used any further, every subsequent call to one of the XOutputStream
129 : : methods will throw a <code>NotConnectedException</code>.
130 : : */
131 : : virtual void SAL_CALL closeOutput( ) throw(::com::sun::star::io::NotConnectedException, ::com::sun::star::io::BufferSizeExceededException, ::com::sun::star::io::IOException, ::com::sun::star::uno::RuntimeException);
132 : : };
133 : :
134 : : } // namespace comphelper
135 : :
136 : : #endif //_COMPHELPER_SEQSTREAM_HXX
137 : :
138 : :
139 : : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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