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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/.
*/
#include <WPXSvInputStream.hxx>
#include <com/sun/star/packages/zip/XZipFileAccess2.hpp>
#include <comphelper/processfactory.hxx>
#include <comphelper/seekableinput.hxx>
#include <rtl/string.hxx>
#include <sot/storage.hxx>
#include <tools/stream.hxx>
#include <unotools/streamwrap.hxx>
#include <unotools/ucbstreamhelper.hxx>
#include <limits>
#include <memory>
#include <unordered_map>
#include <vector>
namespace writerperfect
{
using namespace ::com::sun::star::uno;
using namespace ::com::sun::star::io;
namespace container = com::sun::star::container;
namespace packages = com::sun::star::packages;
namespace
{
class PositionHolder
{
public:
explicit PositionHolder(const Reference<XSeekable> &rxSeekable);
~PositionHolder();
PositionHolder(const PositionHolder &) = delete;
PositionHolder &operator=(const PositionHolder &) = delete;
private:
const Reference<XSeekable> mxSeekable;
const sal_uInt64 mnPosition;
};
PositionHolder::PositionHolder(const Reference<XSeekable> &rxSeekable)
: mxSeekable(rxSeekable)
, mnPosition(rxSeekable->getPosition())
{
}
PositionHolder::~PositionHolder()
{
try
{
mxSeekable->seek(mnPosition);
}
catch (...) {}
}
} // anonymous namespace
typedef struct
{
tools::SvRef<SotStorage> ref;
} SotStorageRefWrapper;
typedef struct
{
tools::SvRef<SotStorageStream> ref;
} SotStorageStreamRefWrapper;
namespace
{
rtl::OUString lcl_normalizeSubStreamPath(const rtl::OUString &rPath)
{
// accept paths which begin by '/'
// TODO: maybe this should to a full normalization
if (rPath.startsWith("/") && rPath.getLength() >= 2)
return rPath.copy(1);
return rPath;
}
}
namespace
{
const rtl::OUString concatPath(const rtl::OUString &lhs, const rtl::OUString &rhs)
{
if (lhs.isEmpty())
return rhs;
return lhs + "/" + rhs;
}
struct OLEStreamData
{
explicit OLEStreamData(const rtl::OString &rName);
SotStorageStreamRefWrapper stream;
/** Name of the stream.
*
* This is not @c rtl::OUString, because we need to be able to
* produce const char* from it.
*/
rtl::OString name;
};
typedef std::unordered_map<rtl::OUString, std::size_t, rtl::OUStringHash> NameMap_t;
typedef std::unordered_map<rtl::OUString, SotStorageRefWrapper, rtl::OUStringHash> OLEStorageMap_t;
/** Representation of an OLE2 storage.
*
* This class tries to bring a bit of sanity to use of SotStorage with
* respect to the needs of @c librevenge::RVNGInputStream API. It
* holds all nested storages for the whole lifetime (more precisely,
* since initialization, which is performed by calling @c
* initialize()), thus ensuring that no created stream is destroyed
* just because its parent storage went out of scope. It also holds a
* bidirectional map of stream names to their indexes (index of a
* stream is determined by deep-first traversal), which is also
* populated during initialization (member variables @c maStreams and
* @c maNameMap).
*
* Streams are created on demand (and saved, for the same reason as
* storages).
*/
struct OLEStorageImpl
{
OLEStorageImpl();
void initialize(SvStream *pStream);
tools::SvRef<SotStorageStream> getStream(const rtl::OUString &rPath);
tools::SvRef<SotStorageStream> const & getStream(std::size_t nId);
private:
void traverse(const tools::SvRef<SotStorage> &rStorage, const rtl::OUString &rPath);
tools::SvRef<SotStorageStream> createStream(const rtl::OUString &rPath);
public:
SotStorageRefWrapper mxRootStorage; //< root storage of the OLE2
OLEStorageMap_t maStorageMap; //< map of all sub storages by name
::std::vector< OLEStreamData > maStreams; //< list of streams and their names
NameMap_t maNameMap; //< map of stream names to indexes (into @c maStreams)
bool mbInitialized;
};
OLEStreamData::OLEStreamData(const rtl::OString &rName)
: stream()
, name(rName)
{
}
OLEStorageImpl::OLEStorageImpl()
: mxRootStorage()
, maStorageMap()
, maStreams()
, maNameMap()
, mbInitialized(false)
{
}
void OLEStorageImpl::initialize(SvStream *const pStream)
{
if (!pStream)
return;
mxRootStorage.ref = new SotStorage(pStream, true);
traverse(mxRootStorage.ref, "");
mbInitialized = true;
}
tools::SvRef<SotStorageStream> OLEStorageImpl::getStream(const rtl::OUString &rPath)
{
const rtl::OUString aPath(lcl_normalizeSubStreamPath(rPath));
NameMap_t::iterator aIt = maNameMap.find(aPath);
// For the while don't return stream in this situation.
// Later, given how libcdr's zip stream implementation behaves,
// return the first stream in the storage if there is one.
if (maNameMap.end() == aIt)
return tools::SvRef<SotStorageStream>();
if (!maStreams[aIt->second].stream.ref.Is())
maStreams[aIt->second].stream.ref = createStream(aPath);
return maStreams[aIt->second].stream.ref;
}
tools::SvRef<SotStorageStream> const & OLEStorageImpl::getStream(const std::size_t nId)
{
if (!maStreams[nId].stream.ref.Is())
maStreams[nId].stream.ref = createStream(rtl::OStringToOUString(maStreams[nId].name, RTL_TEXTENCODING_UTF8));
return maStreams[nId].stream.ref;
}
void OLEStorageImpl::traverse(const tools::SvRef<SotStorage> &rStorage, const rtl::OUString &rPath)
{
SvStorageInfoList infos;
rStorage->FillInfoList(&infos);
for (SvStorageInfoList::const_iterator aIt = infos.begin(); infos.end() != aIt; ++aIt)
{
if (aIt->IsStream())
{
maStreams.push_back(OLEStreamData(rtl::OUStringToOString(concatPath(rPath, aIt->GetName()), RTL_TEXTENCODING_UTF8)));
maNameMap[concatPath(rPath, aIt->GetName())] = maStreams.size() - 1;
}
else if (aIt->IsStorage())
{
const rtl::OUString aPath = concatPath(rPath, aIt->GetName());
SotStorageRefWrapper aStorage;
aStorage.ref = rStorage->OpenSotStorage(aIt->GetName(), StreamMode::STD_READ);
maStorageMap[aPath] = aStorage;
// deep-first traversal
traverse(aStorage.ref, aPath);
}
else
{
SAL_WARN("writerperfect", "OLEStorageImpl::traverse: invalid storage entry, neither stream nor file");
}
}
}
tools::SvRef<SotStorageStream> OLEStorageImpl::createStream(const rtl::OUString &rPath)
{
const sal_Int32 nDelim = rPath.lastIndexOf(sal_Unicode('/'));
if (-1 == nDelim)
return mxRootStorage.ref->OpenSotStream(rPath, StreamMode::STD_READ);
const rtl::OUString aDir = rPath.copy(0, nDelim);
const rtl::OUString aName = rPath.copy(nDelim + 1);
const OLEStorageMap_t::const_iterator aIt = maStorageMap.find(aDir);
if (maStorageMap.end() == aIt)
return nullptr;
return aIt->second.ref->OpenSotStream(aName, StreamMode::STD_READ);
}
}
namespace
{
struct ZipStreamData
{
explicit ZipStreamData(const rtl::OString &rName);
Reference<XInputStream> xStream;
/** Name of the stream.
*
* This is not @c rtl::OUString, because we need to be able to
* produce const char* from it.
*/
rtl::OString aName;
};
/** Representation of a Zip storage.
*
* This is quite similar to OLEStorageImpl, except that we do not need
* to keep all storages (folders) open.
*/
struct ZipStorageImpl
{
explicit ZipStorageImpl(const Reference<container::XNameAccess> &rxContainer);
/** Initialize for access.
*
* This creates a bidirectional map of stream names to their
* indexes (index of a stream is determined by deep-first
* traversal).
*/
void initialize();
Reference<XInputStream> getStream(const rtl::OUString &rPath);
Reference<XInputStream> getStream(std::size_t nId);
private:
void traverse(const Reference<container::XNameAccess> &rxEnum);
Reference<XInputStream> createStream(const rtl::OUString &rPath);
public:
Reference<container::XNameAccess> mxContainer; //< root of the Zip
::std::vector< ZipStreamData > maStreams; //< list of streams and their names
NameMap_t maNameMap; //< map of stream names to indexes (into @c maStreams)
bool mbInitialized;
};
ZipStreamData::ZipStreamData(const rtl::OString &rName)
: xStream()
, aName(rName)
{
}
ZipStorageImpl::ZipStorageImpl(const Reference<container::XNameAccess> &rxContainer)
: mxContainer(rxContainer)
, maStreams()
, maNameMap()
, mbInitialized(false)
{
assert(mxContainer.is());
}
void ZipStorageImpl::initialize()
{
traverse(mxContainer);
mbInitialized = true;
}
Reference<XInputStream> ZipStorageImpl::getStream(const rtl::OUString &rPath)
{
const rtl::OUString aPath(lcl_normalizeSubStreamPath(rPath));
NameMap_t::iterator aIt = maNameMap.find(aPath);
// For the while don't return stream in this situation.
// Later, given how libcdr's zip stream implementation behaves,
// return the first stream in the storage if there is one.
if (maNameMap.end() == aIt)
return Reference<XInputStream>();
if (!maStreams[aIt->second].xStream.is())
maStreams[aIt->second].xStream = createStream(aPath);
return maStreams[aIt->second].xStream;
}
Reference<XInputStream> ZipStorageImpl::getStream(const std::size_t nId)
{
if (!maStreams[nId].xStream.is())
maStreams[nId].xStream = createStream(rtl::OStringToOUString(maStreams[nId].aName, RTL_TEXTENCODING_UTF8));
return maStreams[nId].xStream;
}
void ZipStorageImpl::traverse(const Reference<container::XNameAccess> &rxContainer)
{
const Sequence<rtl::OUString> lNames = rxContainer->getElementNames();
maStreams.reserve(lNames.getLength());
for (sal_Int32 n = 0; n < lNames.getLength(); ++n)
{
if (!lNames[n].endsWith("/")) // skip dirs
{
maStreams.push_back(ZipStreamData(rtl::OUStringToOString(lNames[n], RTL_TEXTENCODING_UTF8)));
maNameMap[lNames[n]] = maStreams.size() - 1;
}
}
}
Reference<XInputStream> ZipStorageImpl::createStream(const rtl::OUString &rPath)
{
Reference<XInputStream> xStream;
try
{
const Reference<XInputStream> xInputStream(mxContainer->getByName(rPath), UNO_QUERY_THROW);
const Reference<XSeekable> xSeekable(xInputStream, UNO_QUERY);
if (xSeekable.is())
xStream = xInputStream;
else
xStream.set(new comphelper::OSeekableInputWrapper(xInputStream, comphelper::getProcessComponentContext()));
}
catch (const Exception &)
{
// nothing needed
}
return xStream;
}
}
class WPXSvInputStreamImpl
{
public:
explicit WPXSvInputStreamImpl(css::uno::Reference<
css::io::XInputStream > const & xStream);
~WPXSvInputStreamImpl();
bool isStructured();
unsigned subStreamCount();
const char *subStreamName(unsigned id);
bool existsSubStream(const char *name);
librevenge::RVNGInputStream *getSubStreamByName(const char *name);
librevenge::RVNGInputStream *getSubStreamById(unsigned id);
const unsigned char *read(unsigned long numBytes, unsigned long &numBytesRead);
int seek(long offset);
long tell();
bool isEnd();
void invalidateReadBuffer();
private:
bool isOLE();
void ensureOLEIsInitialized();
bool isZip();
void ensureZipIsInitialized();
static librevenge::RVNGInputStream *createWPXStream(const tools::SvRef<SotStorageStream> &rxStorage);
static librevenge::RVNGInputStream *createWPXStream(const Reference<XInputStream> &rxStream);
private:
css::uno::Reference< css::io::XInputStream > mxStream;
css::uno::Reference< css::io::XSeekable > mxSeekable;
css::uno::Sequence< sal_Int8 > maData;
std::unique_ptr< OLEStorageImpl > mpOLEStorage;
std::unique_ptr< ZipStorageImpl > mpZipStorage;
bool mbCheckedOLE;
bool mbCheckedZip;
public:
sal_Int64 mnLength;
const unsigned char *mpReadBuffer;
unsigned long mnReadBufferLength;
unsigned long mnReadBufferPos;
};
WPXSvInputStreamImpl::WPXSvInputStreamImpl(Reference< XInputStream > const & xStream) :
mxStream(xStream),
mxSeekable(xStream, UNO_QUERY),
maData(0),
mpOLEStorage(nullptr),
mpZipStorage(nullptr),
mbCheckedOLE(false),
mbCheckedZip(false),
mnLength(0),
mpReadBuffer(nullptr),
mnReadBufferLength(0),
mnReadBufferPos(0)
{
if (!xStream.is() || !mxStream.is())
mnLength = 0;
else
{
if (!mxSeekable.is())
mnLength = 0;
else
{
try
{
mnLength = mxSeekable->getLength();
if (0 < mxSeekable->getPosition())
mxSeekable->seek(0);
}
catch (...)
{
SAL_WARN("writerperfect", "mnLength = mxSeekable->getLength() threw exception");
mnLength = 0;
}
}
}
}
WPXSvInputStreamImpl::~WPXSvInputStreamImpl()
{
}
const unsigned char *WPXSvInputStreamImpl::read(unsigned long numBytes, unsigned long &numBytesRead)
{
numBytesRead = 0;
if (numBytes == 0 || isEnd())
return nullptr;
numBytesRead = mxStream->readSomeBytes(maData, numBytes);
if (numBytesRead == 0)
return nullptr;
return reinterpret_cast<const unsigned char *>(maData.getConstArray());
}
long WPXSvInputStreamImpl::tell()
{
if ((mnLength == 0) || !mxStream.is() || !mxSeekable.is())
return -1L;
else
{
sal_Int64 tmpPosition = mxSeekable->getPosition();
if ((tmpPosition < 0) || (tmpPosition > LONG_MAX))
return -1L;
return (long)tmpPosition;
}
}
int WPXSvInputStreamImpl::seek(long offset)
{
if ((mnLength == 0) || !mxStream.is() || !mxSeekable.is())
return -1;
sal_Int64 tmpPosition = mxSeekable->getPosition();
if ((tmpPosition < 0) || (tmpPosition > LONG_MAX))
return -1;
try
{
mxSeekable->seek(offset);
return 0;
}
catch (...)
{
SAL_WARN("writerperfect", "mxSeekable->seek(offset) threw exception");
return -1;
}
}
bool WPXSvInputStreamImpl::isEnd()
{
if ((mnLength == 0) || !mxStream.is() || !mxSeekable.is())
return true;
return (mxSeekable->getPosition() >= mnLength);
}
bool WPXSvInputStreamImpl::isStructured()
{
if ((mnLength == 0) || !mxStream.is() || !mxSeekable.is())
return false;
PositionHolder pos(mxSeekable);
mxSeekable->seek(0);
if (isOLE())
return true;
mxSeekable->seek(0);
return isZip();
}
unsigned WPXSvInputStreamImpl::subStreamCount()
{
if ((mnLength == 0) || !mxStream.is() || !mxSeekable.is())
return 0;
PositionHolder pos(mxSeekable);
mxSeekable->seek(0);
if (isOLE())
{
ensureOLEIsInitialized();
return mpOLEStorage->maStreams.size();
}
mxSeekable->seek(0);
if (isZip())
{
ensureZipIsInitialized();
return mpZipStorage->maStreams.size();
}
return 0;
}
const char *WPXSvInputStreamImpl::subStreamName(const unsigned id)
{
if ((mnLength == 0) || !mxStream.is() || !mxSeekable.is())
return nullptr;
PositionHolder pos(mxSeekable);
mxSeekable->seek(0);
if (isOLE())
{
ensureOLEIsInitialized();
if (mpOLEStorage->maStreams.size() <= id)
return nullptr;
return mpOLEStorage->maStreams[id].name.getStr();
}
mxSeekable->seek(0);
if (isZip())
{
ensureZipIsInitialized();
if (mpZipStorage->maStreams.size() <= id)
return nullptr;
return mpZipStorage->maStreams[id].aName.getStr();
}
return nullptr;
}
bool WPXSvInputStreamImpl::existsSubStream(const char *const name)
{
if (!name)
return false;
if ((mnLength == 0) || !mxStream.is() || !mxSeekable.is())
return false;
PositionHolder pos(mxSeekable);
mxSeekable->seek(0);
const rtl::OUString aName(rtl::OStringToOUString(rtl::OString(name), RTL_TEXTENCODING_UTF8));
if (isOLE())
{
ensureOLEIsInitialized();
return mpOLEStorage->maNameMap.end() != mpOLEStorage->maNameMap.find(aName);
}
mxSeekable->seek(0);
if (isZip())
{
ensureZipIsInitialized();
return mpZipStorage->maNameMap.end() != mpZipStorage->maNameMap.find(aName);
}
return false;
}
librevenge::RVNGInputStream *WPXSvInputStreamImpl::getSubStreamByName(const char *const name)
{
if (!name)
return nullptr;
if ((mnLength == 0) || !mxStream.is() || !mxSeekable.is())
return nullptr;
PositionHolder pos(mxSeekable);
mxSeekable->seek(0);
const rtl::OUString aName(rtl::OStringToOUString(rtl::OString(name), RTL_TEXTENCODING_UTF8));
if (isOLE())
{
ensureOLEIsInitialized();
return createWPXStream(mpOLEStorage->getStream(aName));
}
mxSeekable->seek(0);
if (isZip())
{
ensureZipIsInitialized();
try
{
return createWPXStream(mpZipStorage->getStream(aName));
}
catch (const Exception &)
{
// nothing needed
}
}
return nullptr;
}
librevenge::RVNGInputStream *WPXSvInputStreamImpl::getSubStreamById(const unsigned id)
{
if ((mnLength == 0) || !mxStream.is() || !mxSeekable.is())
return nullptr;
PositionHolder pos(mxSeekable);
mxSeekable->seek(0);
if (isOLE())
{
ensureOLEIsInitialized();
if (mpOLEStorage->maStreams.size() <= id)
return nullptr;
return createWPXStream(mpOLEStorage->getStream(id));
}
mxSeekable->seek(0);
if (isZip())
{
ensureZipIsInitialized();
if (mpZipStorage->maStreams.size() <= id)
return nullptr;
try
{
return createWPXStream(mpZipStorage->getStream(id));
}
catch (const Exception &)
{
// nothing needed
}
}
return nullptr;
}
void WPXSvInputStreamImpl::invalidateReadBuffer()
{
if (mpReadBuffer)
{
seek((long) tell() + (long)mnReadBufferPos - (long)mnReadBufferLength);
mpReadBuffer = nullptr;
mnReadBufferPos = 0;
mnReadBufferLength = 0;
}
}
librevenge::RVNGInputStream *WPXSvInputStreamImpl::createWPXStream(const tools::SvRef<SotStorageStream> &rxStorage)
{
if (rxStorage.Is())
{
Reference < XInputStream > xContents(new utl::OSeekableInputStreamWrapper(rxStorage));
return new WPXSvInputStream(xContents);
}
return nullptr;
}
librevenge::RVNGInputStream *WPXSvInputStreamImpl::createWPXStream(const Reference<XInputStream> &rxStream)
{
if (rxStream.is())
return new WPXSvInputStream(rxStream);
else
return nullptr;
}
bool WPXSvInputStreamImpl::isOLE()
{
if (!mbCheckedOLE)
{
assert(0 == mxSeekable->getPosition());
std::unique_ptr<SvStream> pStream(utl::UcbStreamHelper::CreateStream(mxStream));
if (pStream && SotStorage::IsOLEStorage(pStream.get()))
mpOLEStorage.reset(new OLEStorageImpl());
mbCheckedOLE = true;
}
return bool(mpOLEStorage);
}
bool WPXSvInputStreamImpl::isZip()
{
if (!mbCheckedZip)
{
assert(0 == mxSeekable->getPosition());
try
{
Sequence<Any> aArgs(1);
aArgs[0] <<= mxStream;
const Reference<XComponentContext> xContext(comphelper::getProcessComponentContext(), UNO_QUERY_THROW);
const Reference<packages::zip::XZipFileAccess2> xZip(
xContext->getServiceManager()->createInstanceWithArgumentsAndContext("com.sun.star.packages.zip.ZipFileAccess", aArgs, xContext),
UNO_QUERY_THROW);
mpZipStorage.reset(new ZipStorageImpl(xZip));
}
catch (const Exception &)
{
// ignore
}
mbCheckedZip = true;
}
return bool(mpZipStorage);
}
void WPXSvInputStreamImpl::ensureOLEIsInitialized()
{
assert(mpOLEStorage);
if (!mpOLEStorage->mbInitialized)
mpOLEStorage->initialize(utl::UcbStreamHelper::CreateStream(mxStream));
}
void WPXSvInputStreamImpl::ensureZipIsInitialized()
{
assert(mpZipStorage);
if (!mpZipStorage->mbInitialized)
mpZipStorage->initialize();
}
WPXSvInputStream::WPXSvInputStream(Reference< XInputStream > const & xStream) :
mpImpl(new WPXSvInputStreamImpl(xStream))
{
}
WPXSvInputStream::~WPXSvInputStream()
{
}
#define BUFFER_MAX 65536
const unsigned char *WPXSvInputStream::read(unsigned long numBytes, unsigned long &numBytesRead)
{
numBytesRead = 0;
if (numBytes == 0 || numBytes > (std::numeric_limits<unsigned long>::max)()/2)
return nullptr;
if (mpImpl->mpReadBuffer)
{
if ((mpImpl->mnReadBufferPos + numBytes > mpImpl->mnReadBufferPos) && (mpImpl->mnReadBufferPos + numBytes <= mpImpl->mnReadBufferLength))
{
const unsigned char *pTmp = mpImpl->mpReadBuffer + mpImpl->mnReadBufferPos;
mpImpl->mnReadBufferPos += numBytes;
numBytesRead = numBytes;
return pTmp;
}
mpImpl->invalidateReadBuffer();
}
unsigned long curpos = (unsigned long) mpImpl->tell();
if (curpos == (unsigned long)-1) // returned ERROR
return nullptr;
if ((curpos + numBytes < curpos) /*overflow*/ ||
(curpos + numBytes >= (sal_uInt64)mpImpl->mnLength)) /*reading more than available*/
{
numBytes = mpImpl->mnLength - curpos;
}
if (numBytes < BUFFER_MAX)
{
if (BUFFER_MAX < mpImpl->mnLength - curpos)
mpImpl->mnReadBufferLength = BUFFER_MAX;
else /* BUFFER_MAX >= mpImpl->mnLength - curpos */
mpImpl->mnReadBufferLength = mpImpl->mnLength - curpos;
}
else
mpImpl->mnReadBufferLength = numBytes;
unsigned long tmpNumBytes(0);
mpImpl->mpReadBuffer = mpImpl->read(mpImpl->mnReadBufferLength, tmpNumBytes);
if (tmpNumBytes != mpImpl->mnReadBufferLength)
mpImpl->mnReadBufferLength = tmpNumBytes;
mpImpl->mnReadBufferPos = 0;
if (!mpImpl->mnReadBufferLength)
return nullptr;
numBytesRead = numBytes;
mpImpl->mnReadBufferPos += numBytesRead;
return mpImpl->mpReadBuffer;
}
long WPXSvInputStream::tell()
{
long retVal = mpImpl->tell();
return retVal - (long)mpImpl->mnReadBufferLength + (long)mpImpl->mnReadBufferPos;
}
int WPXSvInputStream::seek(long offset, librevenge::RVNG_SEEK_TYPE seekType)
{
sal_Int64 tmpOffset = offset;
if (seekType == librevenge::RVNG_SEEK_CUR)
tmpOffset += tell();
if (seekType == librevenge::RVNG_SEEK_END)
tmpOffset += mpImpl->mnLength;
int retVal = 0;
if (tmpOffset < 0)
{
tmpOffset = 0;
retVal = -1;
}
if (tmpOffset > mpImpl->mnLength)
{
tmpOffset = mpImpl->mnLength;
retVal = -1;
}
if (tmpOffset < mpImpl->tell() && (unsigned long)tmpOffset >= (unsigned long)mpImpl->tell() - mpImpl->mnReadBufferLength)
{
mpImpl->mnReadBufferPos = (unsigned long)(tmpOffset + (long) mpImpl->mnReadBufferLength - (long) mpImpl->tell());
return retVal;
}
mpImpl->invalidateReadBuffer();
if (mpImpl->seek(tmpOffset))
return -1;
return retVal;
}
bool WPXSvInputStream::isEnd()
{
return mpImpl->isEnd() && mpImpl->mnReadBufferPos == mpImpl->mnReadBufferLength;
}
bool WPXSvInputStream::isStructured()
{
mpImpl->invalidateReadBuffer();
return mpImpl->isStructured();
}
unsigned WPXSvInputStream::subStreamCount()
{
mpImpl->invalidateReadBuffer();
return mpImpl->subStreamCount();
}
const char *WPXSvInputStream::subStreamName(const unsigned id)
{
mpImpl->invalidateReadBuffer();
return mpImpl->subStreamName(id);
}
bool WPXSvInputStream::existsSubStream(const char *const name)
{
mpImpl->invalidateReadBuffer();
return mpImpl->existsSubStream(name);
}
librevenge::RVNGInputStream *WPXSvInputStream::getSubStreamByName(const char *name)
{
mpImpl->invalidateReadBuffer();
return mpImpl->getSubStreamByName(name);
}
librevenge::RVNGInputStream *WPXSvInputStream::getSubStreamById(const unsigned id)
{
mpImpl->invalidateReadBuffer();
return mpImpl->getSubStreamById(id);
}
}
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