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21 
22 
23 
24 #ifndef OOX_HELPER_BINARYOUTPUTSTREAM_HXX
25 #define OOX_HELPER_BINARYOUTPUTSTREAM_HXX
26 
27 #include "oox/helper/binarystreambase.hxx"
28 
29 namespace com { namespace sun { namespace star {
30     namespace io { class XOutputStream; }
31 } } }
32 
33 namespace oox {
34 
35 // ============================================================================
36 
37 /** Interface for binary output stream classes.
38 
39     The binary data in the stream is written in little-endian format.
40  */
41 class BinaryOutputStream : public virtual BinaryStreamBase
42 {
43 public:
44     /** Derived classes implement writing the contents of the passed data
45         sequence.
46 
47         @param nAtomSize
48             The size of the elements in the memory block, if available. Derived
49             classes may be interested in this information.
50      */
51     virtual void        writeData( const StreamDataSequence& rData, size_t nAtomSize = 1 ) = 0;
52 
53     /** Derived classes implement writing the contents of the (preallocated!)
54         memory buffer pMem.
55 
56         @param nAtomSize
57             The size of the elements in the memory block, if available. Derived
58             classes may be interested in this information.
59      */
60     virtual void        writeMemory( const void* pMem, sal_Int32 nBytes, size_t nAtomSize = 1 ) = 0;
61 
62     /** Writes a value to the stream and converts it to platform byte order.
63         All data types supported by the ByteOrderConverter class can be used.
64      */
65     template< typename Type >
66     void                writeValue( Type nValue );
67 
68     /** Stream operator for all data types supported by the writeValue() function. */
69     template< typename Type >
operator <<(Type nValue)70     inline BinaryOutputStream& operator<<( Type nValue ) { writeValue( nValue ); return *this; }
71 
72 protected:
73     /** This dummy default c'tor will never call the c'tor of the virtual base
74         class BinaryStreamBase as this class cannot be instanciated directly. */
BinaryOutputStream()75     inline explicit     BinaryOutputStream() : BinaryStreamBase( false ) {}
76 };
77 
78 typedef ::boost::shared_ptr< BinaryOutputStream > BinaryOutputStreamRef;
79 
80 // ----------------------------------------------------------------------------
81 
82 template< typename Type >
writeValue(Type nValue)83 void BinaryOutputStream::writeValue( Type nValue )
84 {
85     ByteOrderConverter::convertLittleEndian( nValue );
86     writeMemory( &nValue, static_cast< sal_Int32 >( sizeof( Type ) ), sizeof( Type ) );
87 }
88 
89 // ============================================================================
90 
91 /** Wraps a UNO output stream and provides convenient access functions.
92 
93     The binary data in the stream is written in little-endian format.
94  */
95 class BinaryXOutputStream : public BinaryXSeekableStream, public BinaryOutputStream
96 {
97 public:
98     /** Constructs the wrapper object for the passed output stream.
99 
100         @param rxOutStream
101             The com.sun.star.io.XOutputStream interface of the output stream to
102             be wrapped.
103 
104         @param bAutoClose
105             True = automatically close the wrapped output stream on destruction
106             of this wrapper or when close() is called.
107      */
108     explicit            BinaryXOutputStream(
109                             const ::com::sun::star::uno::Reference< ::com::sun::star::io::XOutputStream >& rxOutStrm,
110                             bool bAutoClose );
111 
112     virtual             ~BinaryXOutputStream();
113 
114     /** Flushes and closes the output stream. Does also close the wrapped UNO
115         output stream if bAutoClose has been set to true in the constructor. */
116     void                close();
117 
118     /** Writes the passed data sequence. */
119     virtual void        writeData( const StreamDataSequence& rData, size_t nAtomSize = 1 );
120 
121     /** Write nBytes bytes from the (preallocated!) buffer pMem. */
122     virtual void        writeMemory( const void* pMem, sal_Int32 nBytes, size_t nAtomSize = 1 );
123 
124     /** Stream operator for all data types supported by the writeValue() function. */
125     template< typename Type >
operator <<(Type nValue)126     inline BinaryXOutputStream& operator<<( Type nValue ) { writeValue( nValue ); return *this; }
127 
128     /** Returns the XOutputStream interface of the wrapped output stream. */
129     inline ::com::sun::star::uno::Reference< ::com::sun::star::io::XOutputStream >
getXOutputStream() const130                         getXOutputStream() const { return mxOutStrm; }
131 
132 private:
133     StreamDataSequence  maBuffer;       /// Data buffer used in writeMemory() function.
134     ::com::sun::star::uno::Reference< ::com::sun::star::io::XOutputStream >
135                         mxOutStrm;      /// Reference to the output stream.
136     bool                mbAutoClose;    /// True = automatically close stream on destruction.
137 };
138 
139 // ============================================================================
140 
141 /** Wraps a StreamDataSequence and provides convenient access functions.
142 
143     The binary data in the stream is written in little-endian format. After
144     construction, the stream points to the beginning of the passed data
145     sequence. The data sequence is expanded automatically while writing to it.
146  */
147 class SequenceOutputStream : public SequenceSeekableStream, public BinaryOutputStream
148 {
149 public:
150     /** Constructs the wrapper object for the passed data sequence.
151 
152         @attention
153             The passed data sequence MUST live at least as long as this stream
154             wrapper. The data sequence MUST NOT be changed from outside as long
155             as this stream wrapper is used to write to it.
156      */
157     explicit            SequenceOutputStream( StreamDataSequence& rData );
158 
159     /** Writes the passed data sequence. */
160     virtual void        writeData( const StreamDataSequence& rData, size_t nAtomSize = 1 );
161 
162     /** Write nBytes bytes from the (preallocated!) buffer pMem. */
163     virtual void        writeMemory( const void* pMem, sal_Int32 nBytes, size_t nAtomSize = 1 );
164 
165     /** Stream operator for all data types supported by the writeValue() function. */
166     template< typename Type >
operator <<(Type nValue)167     inline SequenceOutputStream& operator<<( Type nValue ) { writeValue( nValue ); return *this; }
168 };
169 
170 // ============================================================================
171 
172 } // namespace oox
173 
174 #endif
175