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/* -*- 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 .
*/
#ifndef INCLUDED_OOX_OLE_AXBINARYREADER_HXX
#define INCLUDED_OOX_OLE_AXBINARYREADER_HXX
#include <cstddef>
#include <utility>
#include <vector>
#include <oox/helper/binaryinputstream.hxx>
#include <oox/helper/binarystreambase.hxx>
#include <oox/helper/refvector.hxx>
#include <rtl/ustring.hxx>
#include <sal/types.h>
namespace oox::ole { struct AxFontData; }
namespace oox::ole {
/** A wrapper for a binary input stream that supports aligned read operations.
The implementation does not support seeking back the wrapped stream. All
seeking operations (tell, seekTo, align) are performed relative to the
position of the wrapped stream at construction time of this wrapper. It is
possible to construct this wrapper with an unseekable input stream without
losing any functionality.
*/
class AxAlignedInputStream final : public BinaryInputStream
{
public:
explicit AxAlignedInputStream( BinaryInputStream& rInStrm );
/** Returns the size of the data this stream represents, if the wrapped
stream supports the size() operation. */
virtual sal_Int64 size() const override;
/** Return the current relative stream position (relative to position of
the wrapped stream at construction time). */
virtual sal_Int64 tell() const override;
/** Seeks the stream to the passed relative position, if it is behind the
current position. */
virtual void seek( sal_Int64 nPos ) override;
/** Closes the input stream but not the wrapped stream. */
virtual void close() override;
/** Reads nBytes bytes to the passed sequence.
@return Number of bytes really read. */
virtual sal_Int32 readData( StreamDataSequence& orData, sal_Int32 nBytes, size_t nAtomSize = 1 ) override;
/** Reads nBytes bytes to the (existing) buffer opMem.
@return Number of bytes really read. */
virtual sal_Int32 readMemory( void* opMem, sal_Int32 nBytes, size_t nAtomSize = 1 ) override;
/** Seeks the stream forward by the passed number of bytes. */
virtual void skip( sal_Int32 nBytes, size_t nAtomSize = 1 ) override;
/** Aligns the stream to a multiple of the passed size (relative to the
position of the wrapped stream at construction time). */
void align( size_t nSize );
/** Aligns the stream according to the passed type and reads a value. */
template< typename Type >
[[nodiscard]]
Type readAligned() { align( sizeof( Type ) ); return readValue< Type >(); }
/** Aligns the stream according to the passed type and skips the size of the type. */
template< typename Type >
void skipAligned() { align( sizeof( Type ) ); skip( sizeof( Type ) ); }
private:
BinaryInputStream* mpInStrm; ///< The wrapped input stream.
sal_Int64 mnStrmPos; ///< Tracks relative position in the stream.
sal_Int64 mnStrmSize; ///< Size of the wrapped stream data.
};
/** A pair of integer values as a property. */
typedef ::std::pair< sal_Int32, sal_Int32 > AxPairData;
/** An array of string values as a property. */
typedef ::std::vector< OUString > AxArrayString;
/** Import helper to read simple and complex ActiveX form control properties
from a binary input stream. */
class AxBinaryPropertyReader
{
public:
explicit AxBinaryPropertyReader( BinaryInputStream& rInStrm, bool b64BitPropFlags = false );
/** Reads the next integer property value from the stream, if the
respective flag in the property mask is set. */
template< typename StreamType, typename DataType >
void readIntProperty( DataType& ornValue )
{ if( startNextProperty() ) ornValue = maInStrm.readAligned< StreamType >(); }
/** Reads the next boolean property value from the stream, if the
respective flag in the property mask is set. */
void readBoolProperty( bool& orbValue, bool bReverse = false );
/** Reads the next pair property from the stream, if the respective flag in
the property mask is set. */
void readPairProperty( AxPairData& orPairData );
/** Reads the next string property from the stream, if the respective flag
in the property mask is set. */
void readStringProperty( OUString& orValue );
/** Reads ArrayString, an array of fmString ( compressed or uncompressed )
is read from the stream and inserted into rStrings */
void readArrayStringProperty( std::vector< OUString >& rStrings );
/** Reads the next GUID property from the stream, if the respective flag
in the property mask is set. The GUID will be enclosed in braces. */
void readGuidProperty( OUString& orGuid );
/** Reads the next font property from the stream, if the respective flag in
the property mask is set. */
void readFontProperty( AxFontData& orFontData );
/** Reads the next picture property from the stream, if the respective flag
in the property mask is set. */
void readPictureProperty( StreamDataSequence& orPicData );
/** Skips the next integer property value in the stream, if the respective
flag in the property mask is set. */
template< typename StreamType >
void skipIntProperty() { if( startNextProperty() ) maInStrm.skipAligned< StreamType >(); }
/** Skips the next boolean property value in the stream, if the respective
flag in the property mask is set. */
void skipBoolProperty() { (void)startNextProperty(); }
/** Skips the next string property in the stream, if the respective flag in
the property mask is set. */
void skipStringProperty() { readStringProperty( maDummyString ); }
/** Skips the next ArrayString property in the stream, if the respective flag in
the property mask is set. */
void skipArrayStringProperty() { readArrayStringProperty( maDummyArrayString ); }
/** Skips the next GUID property in the stream, if the respective flag in
the property mask is set. */
void skipGuidProperty() { readGuidProperty( maDummyString ); }
/** Skips the next picture property in the stream, if the respective flag
in the property mask is set. */
void skipPictureProperty() { readPictureProperty( maDummyPicData ); }
/** Has to be called for undefined properties. If the respective flag in
the mask is set, the property import cannot be finished successfully. */
void skipUndefinedProperty() { ensureValid( !startNextProperty() ); }
/** Final processing, reads contents of all complex properties. */
bool finalizeImport();
private:
bool ensureValid( bool bCondition = true );
bool startNextProperty();
private:
/** Base class for complex properties such as string, point, size, GUID, picture. */
struct ComplexProperty
{
virtual ~ComplexProperty();
virtual bool readProperty( AxAlignedInputStream& rInStrm ) = 0;
};
/** Complex property for a 32-bit value pair, e.g. point or size. */
struct PairProperty final : public ComplexProperty
{
AxPairData& mrPairData;
explicit PairProperty( AxPairData& rPairData ) :
mrPairData( rPairData ) {}
virtual bool readProperty( AxAlignedInputStream& rInStrm ) override;
};
/** Complex property for a string value. */
struct StringProperty final : public ComplexProperty
{
OUString& mrValue;
sal_uInt32 mnSize;
explicit StringProperty( OUString& rValue, sal_uInt32 nSize ) :
mrValue( rValue ), mnSize( nSize ) {}
virtual bool readProperty( AxAlignedInputStream& rInStrm ) override;
};
/** Complex property for an array of strings. */
struct ArrayStringProperty final : public ComplexProperty
{
AxArrayString& mrArray;
sal_uInt32 mnSize;
explicit ArrayStringProperty( AxArrayString& rArray, sal_uInt32 nSize ) :
mrArray( rArray ), mnSize( nSize ) {}
virtual bool readProperty( AxAlignedInputStream& rInStrm ) override;
};
/** Complex property for a GUID value. */
struct GuidProperty final : public ComplexProperty
{
OUString& mrGuid;
explicit GuidProperty( OUString& rGuid ) :
mrGuid( rGuid ) {}
virtual bool readProperty( AxAlignedInputStream& rInStrm ) override;
};
/** Stream property for a font structure. */
struct FontProperty final : public ComplexProperty
{
AxFontData& mrFontData;
explicit FontProperty( AxFontData& rFontData ) :
mrFontData( rFontData ) {}
virtual bool readProperty( AxAlignedInputStream& rInStrm ) override;
};
/** Stream property for a picture or mouse icon. */
struct PictureProperty final : public ComplexProperty
{
StreamDataSequence& mrPicData;
explicit PictureProperty( StreamDataSequence& rPicData ) :
mrPicData( rPicData ) {}
virtual bool readProperty( AxAlignedInputStream& rInStrm ) override;
};
typedef RefVector< ComplexProperty > ComplexPropVector;
private:
AxAlignedInputStream maInStrm; ///< The input stream to read from.
ComplexPropVector maLargeProps; ///< Stores info for all used large properties.
ComplexPropVector maStreamProps; ///< Stores info for all used stream data properties.
StreamDataSequence maDummyPicData; ///< Dummy picture for unsupported properties.
OUString maDummyString; ///< Dummy string for unsupported properties.
AxArrayString maDummyArrayString; ///< Dummy strings for unsupported ArrayString properties.
sal_Int64 mnPropFlags; ///< Flags specifying existing properties.
sal_Int64 mnNextProp; ///< Next property to read.
sal_Int64 mnPropsEnd; ///< End position of simple/large properties.
bool mbValid; ///< True = stream still valid.
};
} // namespace oox::ole
#endif
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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