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 // Created on: 1996-11-25
 // Created by: Christophe LEYNADIER
 // Copyright (c) 1996-1999 Matra Datavision
 // Copyright (c) 1999-2014 OPEN CASCADE SAS
 //
 // This file is part of Open CASCADE Technology software library.
 //
 // This library is free software; you can redistribute it and/or modify it under
 // the terms of the GNU Lesser General Public License version 2.1 as published
 // by the Free Software Foundation, with special exception defined in the file
 // OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
 // distribution for complete text of the license and disclaimer of any warranty.
 //
 // Alternatively, this file may be used under the terms of Open CASCADE
 // commercial license or contractual agreement.
 
 #ifndef _Storage_BaseDriver_HeaderFile
 #define _Storage_BaseDriver_HeaderFile
 
 #include <Storage_OpenMode.hxx>
 #include <Storage_Data.hxx>
 #include <Storage_Position.hxx>
 #include <TCollection_AsciiString.hxx>
 #include <TColStd_SequenceOfAsciiString.hxx>
 #include <TColStd_SequenceOfExtendedString.hxx>
 
 class TCollection_ExtendedString;
 
 DEFINE_STANDARD_HANDLE(Storage_BaseDriver,Standard_Transient)
 
 //! Root class for drivers. A driver assigns a physical container
 //! to data to be stored or retrieved, for instance a file.
 //! The FSD package provides two derived concrete classes :
 //! -   FSD_File is a general driver which defines a
 //! file as the container of data.
 class Storage_BaseDriver : public Standard_Transient
 {
 public:
   DEFINE_STANDARD_RTTIEXT(Storage_BaseDriver,Standard_Transient)
 
 public:
 
   Standard_EXPORT virtual ~Storage_BaseDriver();
   
   TCollection_AsciiString Name() const { return myName; }
   
   Storage_OpenMode OpenMode() const { return myOpenMode; }
 
   Standard_EXPORT static TCollection_AsciiString ReadMagicNumber(Standard_IStream& theIStream);
   
 public:
   //!@name Virtual methods, to be provided by descendants
 
   Standard_EXPORT virtual Storage_Error Open (const TCollection_AsciiString& aName, const Storage_OpenMode aMode) = 0;
   
   //! returns True if we are at end of the stream
   Standard_EXPORT virtual Standard_Boolean IsEnd() = 0;
   
   //! return position in the file. Return -1 upon error.
   Standard_EXPORT virtual Storage_Position Tell() = 0;
   
   Standard_EXPORT virtual Storage_Error BeginWriteInfoSection() = 0;
   
   Standard_EXPORT virtual void WriteInfo (const Standard_Integer nbObj, const TCollection_AsciiString& dbVersion, const TCollection_AsciiString& date, const TCollection_AsciiString& schemaName, const TCollection_AsciiString& schemaVersion, const TCollection_ExtendedString& appName, const TCollection_AsciiString& appVersion, const TCollection_ExtendedString& objectType, const TColStd_SequenceOfAsciiString& userInfo) = 0;
   
   Standard_EXPORT virtual Storage_Error EndWriteInfoSection() = 0;
   
   Standard_EXPORT virtual Storage_Error BeginReadInfoSection() = 0;
   
   Standard_EXPORT virtual void ReadInfo (Standard_Integer& nbObj, TCollection_AsciiString& dbVersion, TCollection_AsciiString& date, TCollection_AsciiString& schemaName, TCollection_AsciiString& schemaVersion, TCollection_ExtendedString& appName, TCollection_AsciiString& appVersion, TCollection_ExtendedString& objectType, TColStd_SequenceOfAsciiString& userInfo) = 0;
 
   Standard_EXPORT virtual void ReadCompleteInfo (Standard_IStream& theIStream, Handle(Storage_Data)& theData) = 0;
   
   Standard_EXPORT virtual Storage_Error EndReadInfoSection() = 0;
   
   Standard_EXPORT virtual Storage_Error BeginWriteCommentSection() = 0;
   
   Standard_EXPORT virtual void WriteComment (const TColStd_SequenceOfExtendedString& userComments) = 0;
   
   Standard_EXPORT virtual Storage_Error EndWriteCommentSection() = 0;
   
   Standard_EXPORT virtual Storage_Error BeginReadCommentSection() = 0;
   
   Standard_EXPORT virtual void ReadComment (TColStd_SequenceOfExtendedString& userComments) = 0;
   
   Standard_EXPORT virtual Storage_Error EndReadCommentSection() = 0;
   
   Standard_EXPORT virtual Storage_Error BeginWriteTypeSection() = 0;
   
   Standard_EXPORT virtual void SetTypeSectionSize (const Standard_Integer aSize) = 0;
   
   Standard_EXPORT virtual void WriteTypeInformations (const Standard_Integer typeNum, const TCollection_AsciiString& typeName) = 0;
   
   Standard_EXPORT virtual Storage_Error EndWriteTypeSection() = 0;
   
   Standard_EXPORT virtual Storage_Error BeginReadTypeSection() = 0;
   
   Standard_EXPORT virtual Standard_Integer TypeSectionSize() = 0;
   
   Standard_EXPORT virtual void ReadTypeInformations (Standard_Integer& typeNum, TCollection_AsciiString& typeName) = 0;
   
   Standard_EXPORT virtual Storage_Error EndReadTypeSection() = 0;
   
   Standard_EXPORT virtual Storage_Error BeginWriteRootSection() = 0;
   
   Standard_EXPORT virtual void SetRootSectionSize (const Standard_Integer aSize) = 0;
   
   Standard_EXPORT virtual void WriteRoot (const TCollection_AsciiString& rootName, const Standard_Integer aRef, const TCollection_AsciiString& aType) = 0;
   
   Standard_EXPORT virtual Storage_Error EndWriteRootSection() = 0;
   
   Standard_EXPORT virtual Storage_Error BeginReadRootSection() = 0;
   
   Standard_EXPORT virtual Standard_Integer RootSectionSize() = 0;
   
   Standard_EXPORT virtual void ReadRoot (TCollection_AsciiString& rootName, Standard_Integer& aRef, TCollection_AsciiString& aType) = 0;
   
   Standard_EXPORT virtual Storage_Error EndReadRootSection() = 0;
   
   Standard_EXPORT virtual Storage_Error BeginWriteRefSection() = 0;
   
   Standard_EXPORT virtual void SetRefSectionSize (const Standard_Integer aSize) = 0;
   
   Standard_EXPORT virtual void WriteReferenceType (const Standard_Integer reference, const Standard_Integer typeNum) = 0;
   
   Standard_EXPORT virtual Storage_Error EndWriteRefSection() = 0;
   
   Standard_EXPORT virtual Storage_Error BeginReadRefSection() = 0;
   
   Standard_EXPORT virtual Standard_Integer RefSectionSize() = 0;
   
   Standard_EXPORT virtual void ReadReferenceType (Standard_Integer& reference, Standard_Integer& typeNum) = 0;
   
   Standard_EXPORT virtual Storage_Error EndReadRefSection() = 0;
   
   Standard_EXPORT virtual Storage_Error BeginWriteDataSection() = 0;
   
   Standard_EXPORT virtual void WritePersistentObjectHeader (const Standard_Integer aRef, const Standard_Integer aType) = 0;
   
   Standard_EXPORT virtual void BeginWritePersistentObjectData() = 0;
   
   Standard_EXPORT virtual void BeginWriteObjectData() = 0;
   
   Standard_EXPORT virtual void EndWriteObjectData() = 0;
   
   Standard_EXPORT virtual void EndWritePersistentObjectData() = 0;
   
   Standard_EXPORT virtual Storage_Error EndWriteDataSection() = 0;
   
   Standard_EXPORT virtual Storage_Error BeginReadDataSection() = 0;
   
   Standard_EXPORT virtual void ReadPersistentObjectHeader (Standard_Integer& aRef, Standard_Integer& aType) = 0;
   
   Standard_EXPORT virtual void BeginReadPersistentObjectData() = 0;
   
   Standard_EXPORT virtual void BeginReadObjectData() = 0;
   
   Standard_EXPORT virtual void EndReadObjectData() = 0;
   
   Standard_EXPORT virtual void EndReadPersistentObjectData() = 0;
   
   Standard_EXPORT virtual Storage_Error EndReadDataSection() = 0;
   
   Standard_EXPORT virtual void SkipObject() = 0;
   
   Standard_EXPORT virtual Storage_Error Close() = 0;
 
 public:
   //!@name Output methods
 
   Standard_EXPORT virtual Storage_BaseDriver& PutReference (const Standard_Integer aValue) = 0;
   
   Standard_EXPORT virtual Storage_BaseDriver& PutCharacter (const Standard_Character aValue) = 0;
   Storage_BaseDriver& operator << (const Standard_Character aValue)
   {
     return PutCharacter(aValue);
   }
 
   Standard_EXPORT virtual Storage_BaseDriver& PutExtCharacter(const Standard_ExtCharacter aValue) = 0;
   Storage_BaseDriver& operator << (const Standard_ExtCharacter aValue)
   {
     return PutExtCharacter(aValue);
   }
 
   Standard_EXPORT virtual Storage_BaseDriver& PutInteger(const Standard_Integer aValue) = 0;
   Storage_BaseDriver& operator << (const Standard_Integer aValue)
   {
     return PutInteger(aValue);
   }
 
   Standard_EXPORT virtual Storage_BaseDriver& PutBoolean(const Standard_Boolean aValue) = 0;
   Storage_BaseDriver& operator << (const Standard_Boolean aValue)
   {
     return PutBoolean(aValue);
   }
 
   Standard_EXPORT virtual Storage_BaseDriver& PutReal(const Standard_Real aValue) = 0;
   Storage_BaseDriver& operator << (const Standard_Real aValue)
   {
     return PutReal(aValue);
   }
 
   Standard_EXPORT virtual Storage_BaseDriver& PutShortReal(const Standard_ShortReal aValue) = 0;
   Storage_BaseDriver& operator << (const Standard_ShortReal aValue)
   {
     return PutShortReal(aValue);
   }
 
 public:
   //!@name Input methods
 
   Standard_EXPORT virtual Storage_BaseDriver& GetReference (Standard_Integer& aValue) = 0;
   
   Standard_EXPORT virtual Storage_BaseDriver& GetCharacter (Standard_Character& aValue) = 0;
   Storage_BaseDriver& operator >> (Standard_Character& aValue)
   {
     return GetCharacter(aValue);
   }
 
   Standard_EXPORT virtual Storage_BaseDriver& GetExtCharacter(Standard_ExtCharacter& aValue) = 0;
   Storage_BaseDriver& operator >> (Standard_ExtCharacter& aValue)
   {
     return GetExtCharacter(aValue);
   }
 
   Standard_EXPORT virtual Storage_BaseDriver& GetInteger(Standard_Integer& aValue) = 0;
   Storage_BaseDriver& operator >> (Standard_Integer& aValue)
   {
     return GetInteger(aValue);
   }
 
   Standard_EXPORT virtual Storage_BaseDriver& GetBoolean(Standard_Boolean& aValue) = 0;
   Storage_BaseDriver& operator >> (Standard_Boolean& aValue)
   {
     return GetBoolean(aValue);
   }
 
   Standard_EXPORT virtual Storage_BaseDriver& GetReal(Standard_Real& aValue) = 0;
   Storage_BaseDriver& operator >> (Standard_Real& aValue)
   {
     return GetReal(aValue);
   }
 
   Standard_EXPORT virtual Storage_BaseDriver& GetShortReal(Standard_ShortReal& aValue) = 0;
   Storage_BaseDriver& operator >> (Standard_ShortReal& aValue)
   {
     return GetShortReal(aValue);
   }
 
 protected:
   
   Standard_EXPORT Storage_BaseDriver();
   
   void SetName(const TCollection_AsciiString& aName) { myName = aName; }
 
   void SetOpenMode(const Storage_OpenMode aMode) { myOpenMode = aMode; }
 
 private:
 
   Storage_OpenMode myOpenMode;
   TCollection_AsciiString myName;
 };
 
 #endif // _Storage_BaseDriver_HeaderFile

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