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/* |
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****************************************************************************** |
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* * |
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* COPYRIGHT ACcESS 2004 - All Rights Reserved * |
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* * |
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* This software is the property of ACcESS. No part of this code * |
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* may be copied in any form or by any means without the expressed written * |
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* consent of ACcESS. Copying, use or modification of this software * |
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* by any unauthorised person is illegal unless that person has a software * |
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* license agreement with ACcESS. * |
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* * |
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****************************************************************************** |
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*/ |
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|
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#if !defined escript_DataAlgorithm_20040714_H |
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#define escript_DataAlgorithm_20040714_H |
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|
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#include "escript/Data/DataExpanded.h" |
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#include "escript/Data/DataTagged.h" |
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#include "escript/Data/DataConstant.h" |
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#include "escript/Data/DataArrayView.h" |
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|
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#include <iostream> |
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#include <algorithm> |
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#include <math.h> |
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#include <limits> |
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|
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namespace escript { |
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/** |
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\brief |
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Return the maximum value. |
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|
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Description: |
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Return the maximum value. |
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*/ |
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struct FMax : public std::binary_function<double,double,double> |
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{ |
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inline double operator()(double x, double y) const |
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{ |
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return std::max(x,y); |
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} |
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}; |
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|
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/** |
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\brief |
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Return the minimum value. |
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|
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Description: |
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Return the minimum value. |
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*/ |
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struct FMin : public std::binary_function<double,double,double> |
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{ |
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inline double operator()(double x, double y) const |
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{ |
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return std::min(x,y); |
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} |
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}; |
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|
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/** |
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\brief |
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Return the absolute maximum value. |
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|
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Description: |
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Return the absolute maximum value. |
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*/ |
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struct AbsMax : public std::binary_function<double,double,double> |
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{ |
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inline double operator()(double x, double y) const |
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{ |
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return std::max(fabs(x),fabs(y)); |
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} |
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}; |
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/** |
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\brief |
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Adapt algorithms so they may be used by Data. |
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|
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Description: |
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Adapt algorithms so they may be used by Data. The functor |
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maintains state, ie the currentValue retuned by the operation. |
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*/ |
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template <class BinaryFunction> |
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class DataAlgorithmAdapter { |
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public: |
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DataAlgorithmAdapter(double initialValue): |
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m_currentValue(initialValue) |
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{} |
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inline void operator()(double value) |
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{ |
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m_currentValue=operation(m_currentValue,value); |
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return; |
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} |
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inline double getResult() const |
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{ |
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return m_currentValue; |
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} |
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private: |
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// |
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// the current maximum value |
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double m_currentValue; |
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// |
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// The operation to perform |
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BinaryFunction operation; |
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}; |
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|
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/** |
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\brief |
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Perform the given operation upon all DataElements and return a single |
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result. |
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|
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Description: |
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Perform the given operation upon all DataElements and return a single |
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result. |
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*/ |
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template <class UnaryFunction> |
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inline double algorithm(DataExpanded& data, UnaryFunction operation) |
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{ |
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int i,j; |
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DataArrayView::ValueType::size_type numDPPSample=data.getNumDPPSample(); |
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DataArrayView::ValueType::size_type numSamples=data.getNumSamples(); |
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double resultLocal; |
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#pragma omp parallel private(resultLocal) |
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{ |
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#pragma omp parallel for private(i,j) schedule(static) |
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for (i=0;i<numSamples;++i) { |
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for (j=0;j<numDPPSample;++j) { |
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resultLocal=data.getPointDataView().algorithm(data.getPointOffset(i,j), |
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operation); |
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#pragma omp critical (algorithm) |
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operation(resultLocal); |
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} |
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} |
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} |
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return operation.getResult(); |
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} |
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|
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template <class UnaryFunction> |
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inline double algorithm(DataTagged& data, UnaryFunction operation) |
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{ |
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// |
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// perform the operation on each tagged value including the default |
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const DataTagged::DataMapType& lookup=data.getTagLookup(); |
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DataTagged::DataMapType::const_iterator i; |
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DataTagged::DataMapType::const_iterator lookupEnd=lookup.end(); |
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DataArrayView& dataView=data.getPointDataView(); |
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for (i=lookup.begin();i!=lookupEnd;++i) { |
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operation(dataView.algorithm(i->second,operation)); |
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} |
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// |
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// finally perform the operation on the default value |
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operation(data.getDefaultValue().algorithm(operation)); |
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return operation.getResult(); |
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} |
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|
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template <class UnaryFunction> |
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inline double algorithm(DataConstant& data, UnaryFunction operation) |
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{ |
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return data.getPointDataView().algorithm(operation); |
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} |
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|
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|
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} // end of namespace |
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#endif |
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