void PdfXRef::Write( PdfOutputDevice* pDevice )
{
PdfXRef::TCIVecXRefBlock it = m_vecBlocks.begin();
PdfXRef::TCIVecXRefItems itItems;
PdfXRef::TCIVecReferences itFree;
const PdfReference* pNextFree = NULL;
pdf_objnum nFirst = 0;
pdf_uint32 nCount = 0;
MergeBlocks();
m_offset = pDevice->Tell();
this->BeginWrite( pDevice );
while( it != m_vecBlocks.end() )
{
nCount = (*it).m_nCount;
nFirst = (*it).m_nFirst;
itFree = (*it).freeItems.begin();
itItems = (*it).items.begin();
if( nFirst == 1 )
{
--nFirst;
++nCount;
}
// when there is only one, then we need to start with 0 and the bogus object...
this->WriteSubSection( pDevice, nFirst, nCount );
if( !nFirst )
{
const PdfReference* pFirstFree = this->GetFirstFreeObject( it, itFree );
this->WriteXRefEntry( pDevice, pFirstFree ? pFirstFree->ObjectNumber() : 0, EMPTY_OBJECT_OFFSET, 'f' );
}
while( itItems != (*it).items.end() )
{
// check if there is a free object at the current position
while( itFree != (*it).freeItems.end() &&
*itFree < (*itItems).reference )
{
pdf_gennum nGen = (*itFree).GenerationNumber();
// get a pointer to the next free object
pNextFree = this->GetNextFreeObject( it, itFree );
// write free object
this->WriteXRefEntry( pDevice, pNextFree ? pNextFree->ObjectNumber() : 0, nGen, 'f' );
++itFree;
}
this->WriteXRefEntry( pDevice, (*itItems).offset, (*itItems).reference.GenerationNumber(), 'n',
(*itItems).reference.ObjectNumber() );
++itItems;
}
// Check if there are any free objects left!
while( itFree != (*it).freeItems.end() )
{
pdf_gennum nGen = (*itFree).GenerationNumber();
// get a pointer to the next free object
pNextFree = this->GetNextFreeObject( it, itFree );
// write free object
this->WriteXRefEntry( pDevice, pNextFree ? pNextFree->ObjectNumber() : 0, nGen, 'f' );
++itFree;
}
++it;
}
this->EndWrite( pDevice );
}
Pass::Status BlockMergePass::Process() {
// Process all entry point functions.
ProcessFunction pfn = [this](Function* fp) { return MergeBlocks(fp); };
bool modified = context()->ProcessEntryPointCallTree(pfn);
return modified ? Status::SuccessWithChange : Status::SuccessWithoutChange;
}
