void SmartBuffer::InheritFixups( const SmartBufferPtr& buffer, u32 offset )
{
// inherit all the incoming fixups
if ( !buffer->GetIncomingFixups().Empty() )
{
// first we copy the incoming fixups, since we are messing with that map
S_DumbBufferLocation incoming_fixup_copy = buffer->GetIncomingFixups();
S_DumbBufferLocation::Iterator itr = incoming_fixup_copy.Begin();
S_DumbBufferLocation::Iterator end = incoming_fixup_copy.End();
for( ; itr != end; ++itr )
{
// this is the old incoming fixup data
DumbBufferLocation source_location = (*itr);
// get the target location from the source buffer
M_OffsetToFixup::iterator i = source_location.second->m_OutgoingFixups.find( source_location.first );
HELIUM_ASSERT( i != source_location.second->m_OutgoingFixups.end() );
// get a pointer to the fixup
FixupPtr fixup = (*i).second;
// get the previous destination, we know this fixup must have one or else there
// wouldn't be an incoming entry for it
BufferLocation old_destination;
bool found_destination = fixup->GetDestination( old_destination );
HELIUM_ASSERT( found_destination && old_destination.second == buffer );
// null out the old fixup
AddFixup( source_location, NULL );
// now change the fixup to have the right Helium::SmartPtr
BufferLocation new_destination (old_destination.first + offset, this);
fixup->ChangeDestination( new_destination );
// optimization just incase this fixup is completely internal to buffer
if ( source_location.second == buffer.Ptr() )
{
source_location.first += offset;
source_location.second = this;
}
// restore the fixup with the correct destination
AddFixup( source_location, fixup );
}
}
// inherit all the outgoing fixups from the buffer
if ( !buffer->m_OutgoingFixups.empty() )
{
M_OffsetToFixup outgoing_fixups_copy = buffer->m_OutgoingFixups;
SmartBuffer::M_OffsetToFixup::const_iterator itr = outgoing_fixups_copy.begin();
SmartBuffer::M_OffsetToFixup::const_iterator end = outgoing_fixups_copy.end();
for( ; itr != end; ++itr )
{
// get a pointer to the fixup
FixupPtr fixup = (*itr).second;
// first remove the old fixup
DumbBufferLocation old_source_location ( (*itr).first, buffer );
AddFixup( old_source_location, NULL );
// we need to offset the previous fixup by the correct offset in the current buffer
DumbBufferLocation new_source_location ( offset + (*itr).first, this );
AddFixup( new_source_location, fixup );
}
}
}
