115 lines
3.0 KiB
C
115 lines
3.0 KiB
C
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/*
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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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#ifndef TILEALGEBRA_FROMREGION_H
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#define TILEALGEBRA_FROMREGION_H
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/*
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SECONDO includes
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*/
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#include "AlgebraTypes.h"
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#include "Operator.h"
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#include "QueryProcessor.h"
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#include "Algebras/Spatial/SpatialAlgebra.h"
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#include "Stream.h"
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/*
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TileAlgebra includes
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*/
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#include "../Constants.h"
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#include "../grid/tgrid.h"
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#include "../t/tbool.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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Struct fromregionInfo describes name, syntax, meaning and signature
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of TileAlgebra operator fromregion.
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author: Dirk Zacher
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*/
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struct fromregionInfo : OperatorInfo
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{
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fromregionInfo()
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{
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name = "fromregion";
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syntax = "fromregion(_,_)";
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meaning = "Creates a stream of tbool objects from a region and a grid.";
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signature = Region::BasicType() + " x " +
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tgrid::BasicType() +
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RIGHT_ARROW + Stream<tbool>::BasicType() +
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"(" + tbool::BasicType() + ")";
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}
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};
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/*
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Method fromregionFunction implements the fromregion operator functionality.
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author: Dirk Zacher
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parameters: pArguments - a pointer to the arguments of fromregion operator
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rResult - reference to a Word containing the result
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message - message to distinguish call modes of fromregionFunction
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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 fromregionFunction successfully executed,
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YIELD if rResult contains a stream element (execution continued),
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CANCEL if all stream elements of the result already returned,
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FAILURE if an error occured
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exceptions: -
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*/
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int fromregionFunction(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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Method fromregionTypeMappingFunction returns the return value type
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of fromregion operator in the form of a ListExpr.
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author: Dirk Zacher
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parameters: arguments - arguments of fromregion operator
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return value: return value type of fromregion operator
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exceptions: -
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*/
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ListExpr fromregionTypeMappingFunction(ListExpr arguments);
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}
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#endif // TILEALGEBRA_FROMREGION_H
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