172 lines
3.7 KiB
C++
172 lines
3.7 KiB
C++
/*
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This file is part of SECONDO.
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Copyright (C) 2013, 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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/*
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TileAlgebra includes
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*/
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#include "load.h"
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#include "../t/tintArray.h"
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#include "../t/tintFlob.h"
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/*
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declaration of namespace TileAlgebra
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*/
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namespace TileAlgebra
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{
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/*
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Template method loadFunction calls load method of specific datatype
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and returns the result of this call.
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author: Dirk Zacher
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parameters: pArguments - a pointer to the arguments of load operator
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rResult - reference to a Word containing the result
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message - message to distinguish call modes of loadFunction
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rLocal - reference to a Word to store local method information
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supplier - an Address to a supplier of information of operator tree
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return value: 0 if loadFunction successfully executed, otherwise FAILURE
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exceptions: -
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*/
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template <typename Type>
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int loadFunction(Word* pArguments,
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Word& rResult,
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int message,
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Word& rLocal,
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Supplier supplier)
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{
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int nRetVal = FAILURE;
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if(qp != 0 &&
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pArguments != 0)
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{
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Type* pType = static_cast<Type*>(pArguments[0].addr);
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if(pType != 0)
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{
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rResult = qp->ResultStorage(supplier);
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if(rResult.addr != 0)
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{
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CcBool* pResult = static_cast<CcBool*>(rResult.addr);
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if(pResult != 0)
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{
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pResult->Set(true, pType->load());
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nRetVal = 0;
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}
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}
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}
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}
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return nRetVal;
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}
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/*
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definition of loadFunctions array.
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*/
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ValueMapping loadFunctions[] =
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{
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loadFunction<tintArray>,
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loadFunction<tintFlob>,
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0
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};
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/*
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Method loadSelectFunction returns the index of specific load function
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in loadFunctions array depending on the arguments.
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author: Dirk Zacher
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parameters: arguments - arguments of load operator
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return value: index of specific load function in loadFunctions
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exceptions: -
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*/
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int loadSelectFunction(ListExpr arguments)
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{
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int functionIndex = -1;
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if(arguments != 0)
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{
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NList argumentsList(arguments);
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if(argumentsList.hasLength(1))
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{
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NList argument1 = argumentsList.first();
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if(argument1.isSymbol(tintArray::BasicType()))
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{
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functionIndex = 0;
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}
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else if(argument1.isSymbol(tintFlob::BasicType()))
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{
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functionIndex = 1;
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}
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}
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}
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return functionIndex;
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}
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/*
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Method loadTypeMappingFunction returns the return value type
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of load operator in the form of a ListExpr.
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author: Dirk Zacher
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parameters: arguments - arguments of load operator
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return value: return value type of load operator
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exceptions: -
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*/
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ListExpr loadTypeMappingFunction(ListExpr arguments)
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{
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ListExpr type = NList::typeError("Operator load expects "
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"a tintArray or a tintFlob.");
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NList argumentsList(arguments);
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if(argumentsList.hasLength(1))
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{
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std::string argument1 = argumentsList.first().str();
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if(argument1 == tintArray::BasicType() ||
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argument1 == tintFlob::BasicType())
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{
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type = NList(CcBool::BasicType()).listExpr();
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}
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}
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return type;
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}
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}
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