bencont.cxx

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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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 *  Sun Microsystems Inc., October, 2000
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 *  Sun Industry Standards Source License Version 1.1
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#include "first.hxx"
#include "tocread.hxx"
#include <algorithm>
#include <osl/diagnose.h>
#include <rtl/string.hxx>
 
namespace OpenStormBento
{
 
// String definitions
const char gsBenMagicBytes[] = BEN_MAGIC_BYTES;
 
sal_uLong BenOpenContainer(LwpSvStream * pStream, std::unique_ptr<LtcBenContainer>* ppContainer)
{
    *ppContainer = nullptr;
 
    if (nullptr == pStream)
    {
        return BenErr_ContainerWithNoObjects;
    }
 
    std::unique_ptr<LtcBenContainer> pContainer(new LtcBenContainer(pStream));
    if (pContainer->Open() != BenErr_OK) // delete two inputs
    {
        return BenErr_InvalidTOC;
    }
 
    *ppContainer = std::move(pContainer);
    return BenErr_OK;
}
 
LtcBenContainer::~LtcBenContainer()
{
}
 
BenError
LtcBenContainer::Open() // delete two inputs
{
    BenError Err;
    CBenTOCReader TOCReader(this);
    if ((Err = TOCReader.ReadLabelAndTOC()) != BenErr_OK)
    {
        return Err;
    }
    return BenErr_OK;
}
 
void
LtcBenContainer::RegisterPropertyName(const char * sPropertyName,
  CBenPropertyName ** ppPropertyName)
{
    CUtListElmt * pPrevNamedObjectListElmt;
    CBenNamedObject * pNamedObject = FindNamedObject(&cNamedObjects,
      sPropertyName, &pPrevNamedObjectListElmt);
 
    if (pNamedObject != nullptr)
    {
        if (! pNamedObject->IsPropertyName())
            return;
        else *ppPropertyName = static_cast<CBenPropertyName *>(pNamedObject);
    }
    else
    {
        CUtListElmt * pPrevObject;
        if (FindID(&cObjects, cNextAvailObjectID, &pPrevObject) != nullptr)
            return;
 
        *ppPropertyName = new CBenPropertyName(this, cNextAvailObjectID,
          pPrevObject, sPropertyName, pPrevNamedObjectListElmt);
        ++cNextAvailObjectID;
    }
}
 
CBenObject *
LtcBenContainer::GetNextObject(CBenObject const * pCurrObject)
{
    return static_cast<CBenObject *>(cObjects.GetNextOrNULL(pCurrObject));
}
 
CBenObject *
LtcBenContainer::FindNextObjectWithProperty(CBenObject * pCurrObject,
  BenObjectID PropertyID)
{
    while ((pCurrObject = GetNextObject(pCurrObject)) != nullptr)
        if (pCurrObject->UseProperty(PropertyID) != nullptr)
            return pCurrObject;
 
    return nullptr;
}
 
LtcBenContainer::LtcBenContainer(LwpSvStream * pStream)
    : cNextAvailObjectID(0)
{
    cpStream = pStream;
    pStream->Seek(STREAM_SEEK_TO_END);
    m_ulLength = pStream->Tell();
    pStream->Seek(STREAM_SEEK_TO_BEGIN);
}
 
void LtcBenContainer::Read(void * pBuffer, size_t MaxSize,
  size_t* pAmtRead)
{
    *pAmtRead = cpStream->Read(pBuffer, MaxSize);
}
BenError LtcBenContainer::ReadKnownSize(void * pBuffer, size_t Amt)
{
    size_t ulLength = cpStream->Read(pBuffer, Amt);
    if (ulLength == Amt)
    {
        return BenErr_OK;
    }
    return BenErr_ReadPastEndOfContainer;
}
void LtcBenContainer::SeekToPosition(BenContainerPos Pos)
{
    cpStream->Seek(Pos);
}
void LtcBenContainer::SeekFromEnd(tools::Long Offset)
{
    cpStream->Seek(STREAM_SEEK_TO_END);
    cpStream->SeekRel(Offset);
}
LtcUtBenValueStream * LtcBenContainer::FindNextValueStreamWithPropertyName(const char * sPropertyName)
{
    CBenPropertyName * pPropertyName(nullptr);
    RegisterPropertyName(sPropertyName, &pPropertyName);        // Get property name object
 
    if (nullptr == pPropertyName)
        return nullptr;                                            // Property not exist
 
    // Get current object
    CBenObject * pObj =FindNextObjectWithProperty(nullptr, pPropertyName->GetID()); // Get next object with same property name
    if (nullptr == pObj)
        return nullptr;
 
    CBenValue * pValue;
    LtcUtBenValueStream * pValueStream;
 
    pValue = pObj->UseValue(pPropertyName->GetID());
 
    pValueStream = new LtcUtBenValueStream(pValue);
 
    return pValueStream;
}
 
LtcUtBenValueStream * LtcBenContainer::FindValueStreamWithPropertyName(const char * sPropertyName)
{
    return FindNextValueStreamWithPropertyName(sPropertyName);
}
 
namespace
{
    void readDataInBlocks(SvStream& rSt, sal_uInt64 nDLen, std::vector<sal_uInt8>& rData)
    {
        //read data in blocks as it's more likely large values are simply broken
        //and we'll run out of data before we need to realloc
        for (sal_uInt64 i = 0; i < nDLen; i+= SAL_MAX_UINT16)
        {
           size_t nOldSize = rData.size();
           size_t nBlock = std::min<size_t>(SAL_MAX_UINT16, nDLen - nOldSize);
           rData.resize(nOldSize + nBlock);
           size_t nReadBlock = rSt.ReadBytes(rData.data() + nOldSize, nBlock);
           if (nBlock != nReadBlock)
           {
               rData.resize(nOldSize + nReadBlock);
               break;
           }
        }
    }
}
 
std::vector<sal_uInt8> LtcBenContainer::GetGraphicData(const char *pObjectName)
{
    std::vector<sal_uInt8> aData;
    if (!pObjectName)
    {
        return aData;
    }
    // construct the string of property name
    OString sSName=OString::Concat(pObjectName) + "-S";
    OString sDName=OString::Concat(pObjectName) + "-D";
 
    /* traverse the found properties and construct the stream vectors */
    // get S&D's stream and merge them together
    std::unique_ptr<SvStream> xS(FindValueStreamWithPropertyName(sSName.getStr()));
    std::unique_ptr<SvStream> xD(FindValueStreamWithPropertyName(sDName.getStr()));
 
    sal_uInt64 nDLen = 0;
    if (xD)
    {
        nDLen = xD->TellEnd();
    }
    sal_uInt64 nSLen = 0;
    if (xS)
    {
        nSLen = xS->TellEnd();
    }
 
    sal_uInt64 nLen = nDLen + nSLen;
    OSL_ENSURE(nLen > 0, "expected a non-0 length");
    // the 'D' stream is NULL or it has invalid length
    if (nLen <= 0)
    {
        return aData;
    }
 
    if (xD)
    {
        readDataInBlocks(*xD, nDLen, aData);
        xD.reset();
    }
    if (xS)
    {
        readDataInBlocks(*xS, nSLen, aData);
        xS.reset();
    }
 
    return aData;
}
 
sal_uLong LtcBenContainer::remainingSize() const
{
    return m_ulLength - cpStream->Tell();
}
 
}// end namespace OpenStormBento
 
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