diff options
Diffstat (limited to 'oox/inc/oox/helper/binaryinputstream.hxx')
| -rw-r--r-- | oox/inc/oox/helper/binaryinputstream.hxx | 69 |
1 files changed, 69 insertions, 0 deletions
diff --git a/oox/inc/oox/helper/binaryinputstream.hxx b/oox/inc/oox/helper/binaryinputstream.hxx index 19933ca03c04..8f58e2de4d9e 100644 --- a/oox/inc/oox/helper/binaryinputstream.hxx +++ b/oox/inc/oox/helper/binaryinputstream.hxx @@ -34,6 +34,8 @@ namespace oox { +class BinaryOutputStream; + // ============================================================================ /** Interface for binary input stream classes. @@ -108,6 +110,8 @@ public: False = NUL characters are replaced by question marks (default). */ ::rtl::OUString readUnicodeArray( sal_Int32 nChars, bool bAllowNulChars = false ); + /** Copies nBytes bytes from the current position to the passed output stream. */ + void copyToStream( BinaryOutputStream& rOutStrm, sal_Int64 nBytes = SAL_MAX_INT64 ); private: /** Used by the readValue() template functions to read built-in types. @@ -216,6 +220,71 @@ typedef ::boost::shared_ptr< SequenceInputStream > SequenceInputStreamRef; // ============================================================================ +/** Wraps a BinaryInputStream and provides access to a specific part of the + stream data. + + @descr + Provides access to the stream data block starting at the current + position of the stream, and with a specific length. If the wrapped + stream is seekable, this wrapper will treat the position the wrapped + has at construction time as position "0" (therefore the class name). + */ +class RelativeInputStream : public BinaryInputStream +{ +public: + /** Constructs the wrapper object for the passed stream. + + @attention + The passed input stream MUST live at least as long as this stream + wrapper. The stream MUST NOT be changed from outside as long as + this stream wrapper is used to read from it. + + @param nLength + If specified, restricts the amount of data that can be read from + the passed input stream. + */ + explicit RelativeInputStream( + BinaryInputStream& rInStrm, + sal_Int64 nLength = SAL_MAX_INT64 ); + + /** Returns whether the wrapped stream is seekable. */ + virtual bool isSeekable() const; + /** Returns the size of the data block in the wrapped stream offered by + this wrapper. */ + virtual sal_Int64 getLength() const; + /** Returns the current relative stream position. */ + virtual sal_Int64 tell() const; + /** Seeks the stream to the passed relative position, if the wrapped stream + is seekable. */ + virtual void seek( sal_Int64 nPos ); + + /** Reads nBytes bytes to the passed sequence. Does not read out of the + data block whose size has been specified on construction. + @return Number of bytes really read. */ + virtual sal_Int32 readData( StreamDataSequence& orData, sal_Int32 nBytes ); + /** Reads nBytes bytes to the (existing) buffer opMem. Does not read out of + the data block whose size has been specified on construction. + @return Number of bytes really read. */ + virtual sal_Int32 readMemory( void* opMem, sal_Int32 nBytes ); + /** Seeks the stream forward by the passed number of bytes. This works for + non-seekable streams too. Does not seek out of the data block. */ + virtual void skip( sal_Int32 nBytes ); + + /** Stream operator for integral and floating-point types. */ + template< typename Type > + inline RelativeInputStream& operator>>( Type& ornValue ) { readValue( ornValue ); return *this; } + +private: + BinaryInputStream& mrInStrm; + sal_Int64 mnStartPos; + sal_Int64 mnRelPos; + sal_Int64 mnLength; +}; + +typedef ::boost::shared_ptr< RelativeInputStream > RelativeInputStreamRef; + +// ============================================================================ + } // namespace oox #endif |