150 lines
3.4 KiB
C++
150 lines
3.4 KiB
C++
/*
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----
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This file is part of SECONDO.
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Copyright (C) 2004, University in Hagen, Department of Computer Science,
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Database Systems for New Applications.
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SECONDO is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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SECONDO is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with SECONDO; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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----
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January-April 2006, M. Spiekermann
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*/
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#ifndef CONS_TEMPLATES_H
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#define CONS_TEMPLATES_H
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#include "AlgebraTypes.h"
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#include "Attribute.h"
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/*
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The templates below define some default functions which can be passed to the
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constructor of class ~TypeConstructor~. Whenever these defaults are not
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sufficient you must implement your own functions.
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*/
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template<class T>
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struct ConstructorFunctions
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{
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OutObject out;
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InObject in;
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OutObject saveToList;
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InObject restoreFromList;
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ObjectCreation create;
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ObjectDeletion deletion;
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ObjectOpen open;
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ObjectSave save;
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ObjectClose close;
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ObjectClone clone;
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ObjectCast cast;
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ObjectSizeof sizeOf;
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TypeCheckFunction kindCheck;
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ConstructorFunctions() :
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out(Out),
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in(In),
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saveToList(0),
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restoreFromList(0),
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create(Create),
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deletion(Delete),
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open(Open),
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save(Save),
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close(Close),
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clone(Clone),
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cast(Cast),
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sizeOf(SizeOf),
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kindCheck(0)
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{}
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static void* Cast( void* addr )
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{
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//std::cerr << "CAST" << std::endl;
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return (new (addr)T );
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}
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static Word Create( const ListExpr __attribute__((unused)) typeInfo )
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{
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return (SetWord( new T() ));
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}
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static void Delete( const ListExpr, Word& w )
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{
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delete (T *)w.addr;
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w.addr = 0;
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}
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static void Close( const ListExpr, Word& w )
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{
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delete (T *)w.addr;
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w.addr = 0;
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}
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static Word Clone( const ListExpr, const Word& w )
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{
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return SetWord( new T(*(T *)w.addr) );
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}
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static int SizeOf()
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{
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return sizeof(T);
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}
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static bool Open( SmiRecord& valueRecord,
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size_t& offset,
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const ListExpr typeInfo,
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Word& value )
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{
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T* p = (T*)Attribute::Open( valueRecord, offset, typeInfo );
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value = SetWord( p );
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return true;
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}
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static bool Save( SmiRecord& valueRecord,
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size_t& offset,
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const ListExpr typeInfo,
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Word& value )
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{
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T* p = (T *)value.addr;
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Attribute::Save( valueRecord, offset, typeInfo, (Attribute*)p );
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return true;
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}
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static ListExpr Out( ListExpr __attribute__((unused)) typeInfo,
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Word __attribute__((unused)) value )
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{
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assert(false);
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return 0;
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}
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static Word In( const ListExpr __attribute__((unused)) typeInfo,
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const ListExpr __attribute__((unused)) instance,
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const int __attribute__((unused)) errorPos,
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ListExpr __attribute__((unused)) & errorInfo,
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bool __attribute__((unused)) & correct )
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{
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assert(false);
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return SetWord(Address(0));
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}
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};
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#endif
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