588 lines
20 KiB
C++
588 lines
20 KiB
C++
//========= Copyright Valve Corporation, All rights reserved. ============//
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//
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// Purpose:
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//
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//=============================================================================
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#include "dmserializerbinary.h"
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#include "datamodel/idatamodel.h"
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#include "datamodel.h"
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#include "datamodel/dmelement.h"
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#include "datamodel/dmattributevar.h"
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#include "dmattributeinternal.h"
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#include "dmelementdictionary.h"
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#include "tier1/utlbuffer.h"
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#include "DmElementFramework.h"
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//-----------------------------------------------------------------------------
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// Forward declarations
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//-----------------------------------------------------------------------------
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class CUtlBuffer;
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class CBaseSceneObject;
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//-----------------------------------------------------------------------------
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// special element indices
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//-----------------------------------------------------------------------------
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enum
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{
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ELEMENT_INDEX_NULL = -1,
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ELEMENT_INDEX_EXTERNAL = -2,
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};
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//-----------------------------------------------------------------------------
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// Serialization class for Binary output
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//-----------------------------------------------------------------------------
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class CDmSerializerBinary : public IDmSerializer
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{
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public:
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CDmSerializerBinary() {}
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// Inherited from IDMSerializer
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virtual const char *GetName() const { return "binary"; }
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virtual const char *GetDescription() const { return "Binary"; }
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virtual bool StoresVersionInFile() const { return true; }
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virtual bool IsBinaryFormat() const { return true; }
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virtual int GetCurrentVersion() const { return 2; }
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virtual bool Serialize( CUtlBuffer &buf, CDmElement *pRoot );
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virtual bool Unserialize( CUtlBuffer &buf, const char *pEncodingName, int nEncodingVersion,
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const char *pSourceFormatName, int nFormatVersion,
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DmFileId_t fileid, DmConflictResolution_t idConflictResolution, CDmElement **ppRoot );
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private:
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// Methods related to serialization
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void SerializeElementIndex( CUtlBuffer& buf, CDmElementSerializationDictionary& list, DmElementHandle_t hElement, DmFileId_t fileid );
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void SerializeElementAttribute( CUtlBuffer& buf, CDmElementSerializationDictionary& list, CDmAttribute *pAttribute );
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void SerializeElementArrayAttribute( CUtlBuffer& buf, CDmElementSerializationDictionary& list, CDmAttribute *pAttribute );
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bool SerializeAttributes( CUtlBuffer& buf, CDmElementSerializationDictionary& list, unsigned short *symbolToIndexMap, CDmElement *pElement );
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bool SaveElementDict( CUtlBuffer& buf, unsigned short *symbolToIndexMap, CDmElement *pElement );
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bool SaveElement( CUtlBuffer& buf, CDmElementSerializationDictionary& dict, unsigned short *symbolToIndexMap, CDmElement *pElement);
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// Methods related to unserialization
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DmElementHandle_t UnserializeElementIndex( CUtlBuffer &buf, CUtlVector<CDmElement*> &elementList );
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void UnserializeElementAttribute( CUtlBuffer &buf, CDmAttribute *pAttribute, CUtlVector<CDmElement*> &elementList );
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void UnserializeElementArrayAttribute( CUtlBuffer &buf, CDmAttribute *pAttribute, CUtlVector<CDmElement*> &elementList );
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bool UnserializeAttributes( CUtlBuffer &buf, CDmElement *pElement, CUtlVector<CDmElement*> &elementList, UtlSymId_t *symbolTable );
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bool UnserializeElements( CUtlBuffer &buf, DmFileId_t fileid, DmConflictResolution_t idConflictResolution, CDmElement **ppRoot, UtlSymId_t *symbolTable );
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};
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//-----------------------------------------------------------------------------
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// Singleton instance
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//-----------------------------------------------------------------------------
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static CDmSerializerBinary s_DMSerializerBinary;
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void InstallBinarySerializer( IDataModel *pFactory )
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{
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pFactory->AddSerializer( &s_DMSerializerBinary );
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}
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//-----------------------------------------------------------------------------
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// Write out the index of the element to avoid looks at read time
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//-----------------------------------------------------------------------------
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void CDmSerializerBinary::SerializeElementIndex( CUtlBuffer& buf, CDmElementSerializationDictionary& list, DmElementHandle_t hElement, DmFileId_t fileid )
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{
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if ( hElement == DMELEMENT_HANDLE_INVALID )
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{
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buf.PutInt( ELEMENT_INDEX_NULL ); // invalid handle
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}
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else
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{
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CDmElement *pElement = g_pDataModel->GetElement( hElement );
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if ( pElement )
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{
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if ( pElement->GetFileId() == fileid )
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{
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buf.PutInt( list.Find( pElement ) );
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}
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else
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{
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buf.PutInt( ELEMENT_INDEX_EXTERNAL );
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char idstr[ 40 ];
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UniqueIdToString( pElement->GetId(), idstr, sizeof( idstr ) );
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buf.PutString( idstr );
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}
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}
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else
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{
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DmObjectId_t *pId = NULL;
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DmElementReference_t *pRef = g_pDataModelImp->FindElementReference( hElement, &pId );
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if ( pRef && pId )
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{
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buf.PutInt( ELEMENT_INDEX_EXTERNAL );
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char idstr[ 40 ];
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UniqueIdToString( *pId, idstr, sizeof( idstr ) );
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buf.PutString( idstr );
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}
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else
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{
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buf.PutInt( ELEMENT_INDEX_NULL ); // invalid handle
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}
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}
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}
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}
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//-----------------------------------------------------------------------------
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// Writes out element attributes
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//-----------------------------------------------------------------------------
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void CDmSerializerBinary::SerializeElementAttribute( CUtlBuffer& buf, CDmElementSerializationDictionary& list, CDmAttribute *pAttribute )
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{
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SerializeElementIndex( buf, list, pAttribute->GetValue< DmElementHandle_t >(), pAttribute->GetOwner()->GetFileId() );
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}
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//-----------------------------------------------------------------------------
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// Writes out element array attributes
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//-----------------------------------------------------------------------------
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void CDmSerializerBinary::SerializeElementArrayAttribute( CUtlBuffer& buf, CDmElementSerializationDictionary& list, CDmAttribute *pAttribute )
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{
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DmFileId_t fileid = pAttribute->GetOwner()->GetFileId();
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CDmrElementArray<> vec( pAttribute );
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int nCount = vec.Count();
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buf.PutInt( nCount );
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for ( int i = 0; i < nCount; ++i )
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{
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SerializeElementIndex( buf, list, vec.GetHandle(i), fileid );
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}
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}
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//-----------------------------------------------------------------------------
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// Writes out all attributes
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//-----------------------------------------------------------------------------
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bool CDmSerializerBinary::SerializeAttributes( CUtlBuffer& buf, CDmElementSerializationDictionary& list, unsigned short *symbolToIndexMap, CDmElement *pElement )
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{
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// Collect the attributes to be written
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CDmAttribute **ppAttributes = ( CDmAttribute** )_alloca( pElement->AttributeCount() * sizeof( CDmAttribute* ) );
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int nAttributes = 0;
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for ( CDmAttribute *pAttribute = pElement->FirstAttribute(); pAttribute; pAttribute = pAttribute->NextAttribute() )
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{
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if ( pAttribute->IsFlagSet( FATTRIB_DONTSAVE | FATTRIB_STANDARD ) )
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continue;
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ppAttributes[ nAttributes++ ] = pAttribute;
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}
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// Now write them all out in reverse order, since FirstAttribute is actually the *last* attribute for perf reasons
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buf.PutInt( nAttributes );
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for ( int i = nAttributes - 1; i >= 0; --i )
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{
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CDmAttribute *pAttribute = ppAttributes[ i ];
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Assert( pAttribute );
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buf.PutShort( symbolToIndexMap[ pAttribute->GetNameSymbol() ] );
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buf.PutChar( pAttribute->GetType() );
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switch( pAttribute->GetType() )
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{
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default:
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pAttribute->Serialize( buf );
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break;
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case AT_ELEMENT:
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SerializeElementAttribute( buf, list, pAttribute );
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break;
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case AT_ELEMENT_ARRAY:
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SerializeElementArrayAttribute( buf, list, pAttribute );
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break;
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}
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}
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return buf.IsValid();
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}
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bool CDmSerializerBinary::SaveElement( CUtlBuffer& buf, CDmElementSerializationDictionary& list, unsigned short *symbolToIndexMap, CDmElement *pElement )
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{
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SerializeAttributes( buf, list, symbolToIndexMap, pElement );
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return buf.IsValid();
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}
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bool CDmSerializerBinary::SaveElementDict( CUtlBuffer& buf, unsigned short *symbolToIndexMap, CDmElement *pElement )
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{
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buf.PutShort( symbolToIndexMap[ pElement->GetType() ] );
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buf.PutString( pElement->GetName() );
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buf.Put( &pElement->GetId(), sizeof(DmObjectId_t) );
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return buf.IsValid();
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}
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void MarkSymbol( UtlSymId_t *indexToSymbolMap, unsigned short *symbolToIndexMap, unsigned short &nSymbols, UtlSymId_t sym )
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{
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if ( symbolToIndexMap[ sym ] != 0xffff )
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return;
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symbolToIndexMap[ sym ] = nSymbols;
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indexToSymbolMap[ nSymbols ] = sym;
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nSymbols++;
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}
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void MarkSymbols( UtlSymId_t *indexToSymbolMap, unsigned short *symbolToIndexMap, unsigned short &nSymbols, CDmElement *pElement )
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{
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MarkSymbol( indexToSymbolMap, symbolToIndexMap, nSymbols, pElement->GetType() );
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for ( CDmAttribute *pAttr = pElement->FirstAttribute(); pAttr; pAttr = pAttr->NextAttribute() )
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{
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MarkSymbol( indexToSymbolMap, symbolToIndexMap, nSymbols, pAttr->GetNameSymbol() );
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}
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}
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bool CDmSerializerBinary::Serialize( CUtlBuffer &outBuf, CDmElement *pRoot )
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{
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// Save elements, attribute links
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CDmElementSerializationDictionary dict;
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dict.BuildElementList( pRoot, true );
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// TODO - consider allowing dmxconvert to skip the collection step, since the only datamodel symbols will be the ones from the file
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unsigned short nTotalSymbols = g_pDataModelImp->GetSymbolCount();
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UtlSymId_t *indexToSymbolMap = ( UtlSymId_t * )stackalloc( nTotalSymbols * sizeof( UtlSymId_t ) );
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unsigned short *symbolToIndexMap = ( unsigned short* )stackalloc( nTotalSymbols * sizeof( unsigned short ) );
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V_memset( indexToSymbolMap, 0xff, nTotalSymbols * sizeof( UtlSymId_t ) );
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V_memset( symbolToIndexMap, 0xff, nTotalSymbols * sizeof( unsigned short ) );
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// collect list of attribute names and element types into string table
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unsigned short nUsedSymbols = 0;
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DmElementDictHandle_t i;
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for ( i = dict.FirstRootElement(); i != ELEMENT_DICT_HANDLE_INVALID; i = dict.NextRootElement(i) )
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{
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MarkSymbols( indexToSymbolMap, symbolToIndexMap, nUsedSymbols, dict.GetRootElement( i ) );
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}
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Assert( nUsedSymbols <= nTotalSymbols );
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// write out the symbol table for this file (may be significantly smaller than datamodel's full symbol table)
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outBuf.PutShort( nUsedSymbols );
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for ( int si = 0; si < nUsedSymbols; ++si )
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{
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UtlSymId_t sym = indexToSymbolMap[ si ];
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const char *pStr = g_pDataModel->GetString( sym );
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outBuf.PutString( pStr );
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}
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// First write out the dictionary of all elements (to avoid later stitching up in unserialize)
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outBuf.PutInt( dict.RootElementCount() );
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for ( i = dict.FirstRootElement(); i != ELEMENT_DICT_HANDLE_INVALID; i = dict.NextRootElement(i) )
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{
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SaveElementDict( outBuf, symbolToIndexMap, dict.GetRootElement( i ) );
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}
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// Now write out the attributes of each of those elements
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for ( i = dict.FirstRootElement(); i != ELEMENT_DICT_HANDLE_INVALID; i = dict.NextRootElement(i) )
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{
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SaveElement( outBuf, dict, symbolToIndexMap, dict.GetRootElement( i ) );
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}
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return true;
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}
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//-----------------------------------------------------------------------------
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// Reads an element index and converts it to a handle (local or external)
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//-----------------------------------------------------------------------------
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DmElementHandle_t CDmSerializerBinary::UnserializeElementIndex( CUtlBuffer &buf, CUtlVector<CDmElement*> &elementList )
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{
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int nElementIndex = buf.GetInt();
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Assert( nElementIndex < elementList.Count() );
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if ( nElementIndex == ELEMENT_INDEX_EXTERNAL )
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{
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char idstr[ 40 ];
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buf.GetString( idstr );
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DmObjectId_t id;
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UniqueIdFromString( &id, idstr, sizeof( idstr ) );
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return g_pDataModelImp->FindOrCreateElementHandle( id );
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}
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Assert( nElementIndex >= 0 || nElementIndex == ELEMENT_INDEX_NULL );
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if ( nElementIndex < 0 || !elementList[ nElementIndex ] )
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return DMELEMENT_HANDLE_INVALID;
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return elementList[ nElementIndex ]->GetHandle();
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}
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//-----------------------------------------------------------------------------
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// Reads an element attribute
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//-----------------------------------------------------------------------------
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void CDmSerializerBinary::UnserializeElementAttribute( CUtlBuffer &buf, CDmAttribute *pAttribute, CUtlVector<CDmElement*> &elementList )
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{
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DmElementHandle_t hElement = UnserializeElementIndex( buf, elementList );
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if ( !pAttribute )
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return;
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pAttribute->SetValue( hElement );
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}
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//-----------------------------------------------------------------------------
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// Reads an element array attribute
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//-----------------------------------------------------------------------------
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void CDmSerializerBinary::UnserializeElementArrayAttribute( CUtlBuffer &buf, CDmAttribute *pAttribute, CUtlVector<CDmElement*> &elementList )
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{
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int nElementCount = buf.GetInt();
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if ( !pAttribute || pAttribute->GetType() != AT_ELEMENT_ARRAY )
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{
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// Parse past the data
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for ( int i = 0; i < nElementCount; ++i )
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{
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UnserializeElementIndex( buf, elementList );
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}
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return;
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}
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CDmrElementArray<> array( pAttribute );
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array.RemoveAll();
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array.EnsureCapacity( nElementCount );
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for ( int i = 0; i < nElementCount; ++i )
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{
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DmElementHandle_t hElement = UnserializeElementIndex( buf, elementList );
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array.AddToTail( hElement );
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}
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}
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//-----------------------------------------------------------------------------
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// Reads a single element
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//-----------------------------------------------------------------------------
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bool CDmSerializerBinary::UnserializeAttributes( CUtlBuffer &buf, CDmElement *pElement, CUtlVector<CDmElement*> &elementList, UtlSymId_t *symbolTable )
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{
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char nameBuf[ 1024 ];
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int nAttributeCount = buf.GetInt();
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for ( int i = 0; i < nAttributeCount; ++i )
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{
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const char *pName = NULL;
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if ( symbolTable )
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{
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unsigned short nName = buf.GetShort();
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pName = g_pDataModel->GetString( symbolTable[ nName ] );
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}
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else
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{
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buf.GetString( nameBuf );
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pName = nameBuf;
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}
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DmAttributeType_t nAttributeType = (DmAttributeType_t)buf.GetChar();
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Assert( pName != NULL && pName[ 0 ] != '\0' );
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Assert( nAttributeType != AT_UNKNOWN );
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CDmAttribute *pAttribute = pElement ? pElement->AddAttribute( pName, nAttributeType ) : NULL;
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if ( pElement && !pAttribute )
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{
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Warning("Dm: Attempted to read an attribute (\"%s\") of an inappropriate type!\n", pName );
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return false;
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}
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switch( nAttributeType )
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{
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default:
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if ( !pAttribute )
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{
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SkipUnserialize( buf, nAttributeType );
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}
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else
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{
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pAttribute->Unserialize( buf );
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}
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break;
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case AT_ELEMENT:
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UnserializeElementAttribute( buf, pAttribute, elementList );
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break;
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case AT_ELEMENT_ARRAY:
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UnserializeElementArrayAttribute( buf, pAttribute, elementList );
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break;
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}
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}
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return buf.IsValid();
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}
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struct DmIdPair_t
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{
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DmObjectId_t m_oldId;
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DmObjectId_t m_newId;
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DmIdPair_t &operator=( const DmIdPair_t &that )
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{
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CopyUniqueId( that.m_oldId, &m_oldId );
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CopyUniqueId( that.m_newId, &m_newId );
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return *this;
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}
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static unsigned int HashKey( const DmIdPair_t& that )
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{
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return *( unsigned int* )&that.m_oldId.m_Value;
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}
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static bool Compare( const DmIdPair_t& a, const DmIdPair_t& b )
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{
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return IsUniqueIdEqual( a.m_oldId, b.m_oldId );
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}
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};
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DmElementHandle_t CreateElementWithFallback( const char *pType, const char *pName, DmFileId_t fileid, const DmObjectId_t &id )
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{
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DmElementHandle_t hElement = g_pDataModel->CreateElement( pType, pName, fileid, &id );
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if ( hElement == DMELEMENT_HANDLE_INVALID )
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{
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Warning("Binary: Element uses unknown element type %s\n", pType );
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hElement = g_pDataModel->CreateElement( "DmElement", pName, fileid, &id );
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Assert( hElement != DMELEMENT_HANDLE_INVALID );
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}
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return hElement;
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}
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//-----------------------------------------------------------------------------
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// Main entry point for the unserialization
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//-----------------------------------------------------------------------------
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bool CDmSerializerBinary::Unserialize( CUtlBuffer &buf, const char *pEncodingName, int nEncodingVersion,
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const char *pSourceFormatName, int nSourceFormatVersion,
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DmFileId_t fileid, DmConflictResolution_t idConflictResolution, CDmElement **ppRoot )
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{
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Assert( !V_stricmp( pEncodingName, GetName() ) );
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if ( V_stricmp( pEncodingName, GetName() ) != 0 )
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return false;
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Assert( nEncodingVersion >= 0 && nEncodingVersion <= 2 );
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if ( nEncodingVersion < 0 || nEncodingVersion > 2 )
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return false;
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bool bReadSymbolTable = nEncodingVersion >= 2;
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// Read string table
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unsigned short nStrings = 0;
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UtlSymId_t *symbolTable = NULL;
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if ( bReadSymbolTable )
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{
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char stringBuf[ 256 ];
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nStrings = buf.GetShort();
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symbolTable = ( UtlSymId_t* )stackalloc( nStrings * sizeof( UtlSymId_t ) );
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for ( int i = 0; i < nStrings; ++i )
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{
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buf.GetString( stringBuf );
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symbolTable[ i ] = g_pDataModel->GetSymbol( stringBuf );
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}
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}
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bool bSuccess = UnserializeElements( buf, fileid, idConflictResolution, ppRoot, symbolTable );
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if ( !bSuccess )
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return false;
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return g_pDataModel->UpdateUnserializedElements( pSourceFormatName, nSourceFormatVersion, fileid, idConflictResolution, ppRoot );
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}
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bool CDmSerializerBinary::UnserializeElements( CUtlBuffer &buf, DmFileId_t fileid, DmConflictResolution_t idConflictResolution, CDmElement **ppRoot, UtlSymId_t *symbolTable )
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{
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*ppRoot = NULL;
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// Read in the element count.
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int nElementCount = buf.GetInt();
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if ( !nElementCount )
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return true;
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int nMaxIdConflicts = min( nElementCount, g_pDataModel->GetAllocatedElementCount() );
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int nExpectedIdCopyConflicts = ( idConflictResolution == CR_FORCE_COPY || idConflictResolution == CR_COPY_NEW ) ? nMaxIdConflicts : 0;
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int nBuckets = min( 0x10000, max( 16, nExpectedIdCopyConflicts / 16 ) ); // CUtlHash can only address up to 65k buckets
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CUtlHash< DmIdPair_t > idmap( nBuckets, 0, 0, DmIdPair_t::Compare, DmIdPair_t::HashKey );
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// Read + create all elements
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CUtlVector<CDmElement*> elementList( 0, nElementCount );
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for ( int i = 0; i < nElementCount; ++i )
|
|
{
|
|
char pName[2048];
|
|
DmObjectId_t id;
|
|
|
|
char typeBuf[ 256 ];
|
|
const char *pType = NULL;
|
|
if ( symbolTable )
|
|
{
|
|
unsigned short nType = buf.GetShort();
|
|
pType = g_pDataModel->GetString( symbolTable[ nType ] );
|
|
}
|
|
else
|
|
{
|
|
buf.GetString( typeBuf );
|
|
pType = typeBuf;
|
|
}
|
|
|
|
buf.GetString( pName );
|
|
buf.Get( &id, sizeof(DmObjectId_t) );
|
|
|
|
if ( idConflictResolution == CR_FORCE_COPY )
|
|
{
|
|
DmIdPair_t idpair;
|
|
CopyUniqueId( id, &idpair.m_oldId );
|
|
CreateUniqueId( &idpair.m_newId );
|
|
idmap.Insert( idpair );
|
|
|
|
CopyUniqueId( idpair.m_newId, &id );
|
|
}
|
|
|
|
DmElementHandle_t hElement = DMELEMENT_HANDLE_INVALID;
|
|
DmElementHandle_t hExistingElement = g_pDataModel->FindElement( id );
|
|
if ( hExistingElement != DMELEMENT_HANDLE_INVALID )
|
|
{
|
|
// id is already in use - need to resolve conflict
|
|
|
|
if ( idConflictResolution == CR_DELETE_NEW )
|
|
{
|
|
elementList.AddToTail( g_pDataModel->GetElement( hExistingElement ) );
|
|
continue; // just don't create this element
|
|
}
|
|
else if ( idConflictResolution == CR_DELETE_OLD )
|
|
{
|
|
g_pDataModelImp->DeleteElement( hExistingElement, HR_NEVER ); // keep the handle around until CreateElementWithFallback
|
|
hElement = CreateElementWithFallback( pType, pName, fileid, id );
|
|
Assert( hElement == hExistingElement );
|
|
}
|
|
else if ( idConflictResolution == CR_COPY_NEW )
|
|
{
|
|
DmIdPair_t idpair;
|
|
CopyUniqueId( id, &idpair.m_oldId );
|
|
CreateUniqueId( &idpair.m_newId );
|
|
idmap.Insert( idpair );
|
|
|
|
hElement = CreateElementWithFallback( pType, pName, fileid, idpair.m_newId );
|
|
}
|
|
else
|
|
Assert( 0 );
|
|
}
|
|
|
|
// if not found, then create it
|
|
if ( hElement == DMELEMENT_HANDLE_INVALID )
|
|
{
|
|
hElement = CreateElementWithFallback( pType, pName, fileid, id );
|
|
}
|
|
|
|
CDmElement *pElement = g_pDataModel->GetElement( hElement );
|
|
CDmeElementAccessor::MarkBeingUnserialized( pElement, true );
|
|
elementList.AddToTail( pElement );
|
|
}
|
|
|
|
// The root is the 0th element
|
|
*ppRoot = elementList[ 0 ];
|
|
|
|
// Now read all attributes
|
|
for ( int i = 0; i < nElementCount; ++i )
|
|
{
|
|
CDmElement *pInternal = elementList[ i ];
|
|
UnserializeAttributes( buf, pInternal->GetFileId() == fileid ? pInternal : NULL, elementList, symbolTable );
|
|
}
|
|
|
|
for ( int i = 0; i < nElementCount; ++i )
|
|
{
|
|
CDmElement *pElement = elementList[ i ];
|
|
if ( pElement->GetFileId() == fileid )
|
|
{
|
|
// mark all unserialized elements as done unserializing, and call Resolve()
|
|
CDmeElementAccessor::MarkBeingUnserialized( pElement, false );
|
|
}
|
|
}
|
|
|
|
g_pDmElementFrameworkImp->RemoveCleanElementsFromDirtyList( );
|
|
return buf.IsValid();
|
|
}
|