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authorHarpreet2016-09-03 00:34:27 +0530
committerHarpreet2016-09-03 00:34:27 +0530
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treed9d06639fb7fa61aef59be0363655e4747105ec7 /newstructure/thirdparty/linux/include/coin/CoinDenseVector.hpp
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+/* $Id: CoinDenseVector.hpp 1372 2011-01-03 23:31:00Z lou $ */
+// Copyright (C) 2003, International Business Machines
+// Corporation and others. All Rights Reserved.
+// This code is licensed under the terms of the Eclipse Public License (EPL).
+
+#ifndef CoinDenseVector_H
+#define CoinDenseVector_H
+
+#if defined(_MSC_VER)
+// Turn off compiler warning about long names
+# pragma warning(disable:4786)
+#endif
+
+#include <cassert>
+#include <cstdlib>
+#include <cmath>
+#include "CoinHelperFunctions.hpp"
+
+//#############################################################################
+/** A function that tests the methods in the CoinDenseVector class. The
+ only reason for it not to be a member method is that this way it doesn't
+ have to be compiled into the library. And that's a gain, because the
+ library should be compiled with optimization on, but this method should be
+ compiled with debugging. */
+ template <typename T> void
+ CoinDenseVectorUnitTest(T dummy);
+
+//#############################################################################
+/** Dense Vector
+
+Stores a dense (or expanded) vector of floating point values.
+Type of vector elements is controlled by templating.
+(Some working quantities such as accumulated sums
+are explicitly declared of type double). This allows the
+components of the vector integer, single or double precision.
+
+Here is a sample usage:
+@verbatim
+ const int ne = 4;
+ double el[ne] = { 10., 40., 1., 50. }
+
+ // Create vector and set its value
+ CoinDenseVector<double> r(ne,el);
+
+ // access each element
+ assert( r.getElements()[0]==10. );
+ assert( r.getElements()[1]==40. );
+ assert( r.getElements()[2]== 1. );
+ assert( r.getElements()[3]==50. );
+
+ // Test for equality
+ CoinDenseVector<double> r1;
+ r1=r;
+
+ // Add dense vectors.
+ // Similarly for subtraction, multiplication,
+ // and division.
+ CoinDenseVector<double> add = r + r1;
+ assert( add[0] == 10.+10. );
+ assert( add[1] == 40.+40. );
+ assert( add[2] == 1.+ 1. );
+ assert( add[3] == 50.+50. );
+
+ assert( r.sum() == 10.+40.+1.+50. );
+@endverbatim
+*/
+template <typename T> class CoinDenseVector {
+private:
+ /**@name Private member data */
+ //@{
+ /// Size of element vector
+ int nElements_;
+ ///Vector elements
+ T * elements_;
+ //@}
+
+public:
+ /**@name Get methods. */
+ //@{
+ /// Get the size
+ inline int getNumElements() const { return nElements_; }
+ inline int size() const { return nElements_; }
+ /// Get element values
+ inline const T * getElements() const { return elements_; }
+ /// Get element values
+ inline T * getElements() { return elements_; }
+ //@}
+
+ //-------------------------------------------------------------------
+ // Set indices and elements
+ //-------------------------------------------------------------------
+ /**@name Set methods */
+ //@{
+ /// Reset the vector (i.e. set all elemenets to zero)
+ void clear();
+ /** Assignment operator */
+ CoinDenseVector & operator=(const CoinDenseVector &);
+ /** Member of array operator */
+ T & operator[](int index) const;
+
+ /** Set vector size, and elements.
+ Size is the length of the elements vector.
+ The element vector is copied into this class instance's
+ member data. */
+ void setVector(int size, const T * elems);
+
+
+ /** Elements set to have the same scalar value */
+ void setConstant(int size, T elems);
+
+
+ /** Set an existing element in the dense vector
+ The first argument is the "index" into the elements() array
+ */
+ void setElement(int index, T element);
+ /** Resize the dense vector to be the first newSize elements.
+ If length is decreased, vector is truncated. If increased
+ new entries, set to new default element */
+ void resize(int newSize, T fill=T());
+
+ /** Append a dense vector to this dense vector */
+ void append(const CoinDenseVector &);
+ //@}
+
+ /**@name norms, sum and scale */
+ //@{
+ /// 1-norm of vector
+ inline T oneNorm() const {
+ T norm = 0;
+ for (int i=0; i<nElements_; i++)
+ norm += CoinAbs(elements_[i]);
+ return norm;
+ }
+ /// 2-norm of vector
+ inline double twoNorm() const {
+ double norm = 0.;
+ for (int i=0; i<nElements_; i++)
+ norm += elements_[i] * elements_[i];
+ // std namespace removed because it was causing a compile
+ // problem with Microsoft Visual C++
+ return /*std::*/sqrt(norm);
+ }
+ /// infinity-norm of vector
+ inline T infNorm() const {
+ T norm = 0;
+ for (int i=0; i<nElements_; i++)
+ norm = CoinMax(norm, CoinAbs(elements_[i]));
+ return norm;
+ }
+ /// sum of vector elements
+ inline T sum() const {
+ T sume = 0;
+ for (int i=0; i<nElements_; i++)
+ sume += elements_[i];
+ return sume;
+ }
+ /// scale vector elements
+ inline void scale(T factor) {
+ for (int i=0; i<nElements_; i++)
+ elements_[i] *= factor;
+ return;
+ }
+ //@}
+
+ /**@name Arithmetic operators. */
+ //@{
+ /// add <code>value</code> to every entry
+ void operator+=(T value);
+ /// subtract <code>value</code> from every entry
+ void operator-=(T value);
+ /// multiply every entry by <code>value</code>
+ void operator*=(T value);
+ /// divide every entry by <code>value</code>
+ void operator/=(T value);
+ //@}
+
+ /**@name Constructors and destructors */
+ //@{
+ /** Default constructor */
+ CoinDenseVector();
+ /** Alternate Constructors - set elements to vector of Ts */
+ CoinDenseVector(int size, const T * elems);
+ /** Alternate Constructors - set elements to same scalar value */
+ CoinDenseVector(int size, T element=T());
+ /** Copy constructors */
+ CoinDenseVector(const CoinDenseVector &);
+
+ /** Destructor */
+ ~CoinDenseVector ();
+ //@}
+
+private:
+ /**@name Private methods */
+ //@{
+ /// Copy internal data
+ void gutsOfSetVector(int size, const T * elems);
+ /// Set all elements to a given value
+ void gutsOfSetConstant(int size, T value);
+ //@}
+};
+
+//#############################################################################
+
+/**@name Arithmetic operators on dense vectors.
+
+ <strong>NOTE</strong>: Because these methods return an object (they can't
+ return a reference, though they could return a pointer...) they are
+ <em>very</em> inefficient...
+ */
+//@{
+/// Return the sum of two dense vectors
+template <typename T> inline
+CoinDenseVector<T> operator+(const CoinDenseVector<T>& op1,
+ const CoinDenseVector<T>& op2){
+ assert(op1.size() == op2.size());
+ int size = op1.size();
+ CoinDenseVector<T> op3(size);
+ const T *elements1 = op1.getElements();
+ const T *elements2 = op2.getElements();
+ T *elements3 = op3.getElements();
+ for(int i=0; i<size; i++)
+ elements3[i] = elements1[i] + elements2[i];
+ return op3;
+}
+
+/// Return the difference of two dense vectors
+template <typename T> inline
+CoinDenseVector<T> operator-(const CoinDenseVector<T>& op1,
+ const CoinDenseVector<T>& op2){
+ assert(op1.size() == op2.size());
+ int size = op1.size();
+ CoinDenseVector<T> op3(size);
+ const T *elements1 = op1.getElements();
+ const T *elements2 = op2.getElements();
+ T *elements3 = op3.getElements();
+ for(int i=0; i<size; i++)
+ elements3[i] = elements1[i] - elements2[i];
+ return op3;
+}
+
+
+/// Return the element-wise product of two dense vectors
+template <typename T> inline
+CoinDenseVector<T> operator*(const CoinDenseVector<T>& op1,
+ const CoinDenseVector<T>& op2){
+ assert(op1.size() == op2.size());
+ int size = op1.size();
+ CoinDenseVector<T> op3(size);
+ const T *elements1 = op1.getElements();
+ const T *elements2 = op2.getElements();
+ T *elements3 = op3.getElements();
+ for(int i=0; i<size; i++)
+ elements3[i] = elements1[i] * elements2[i];
+ return op3;
+}
+
+/// Return the element-wise ratio of two dense vectors
+template <typename T> inline
+CoinDenseVector<T> operator/(const CoinDenseVector<T>& op1,
+ const CoinDenseVector<T>& op2){
+ assert(op1.size() == op2.size());
+ int size = op1.size();
+ CoinDenseVector<T> op3(size);
+ const T *elements1 = op1.getElements();
+ const T *elements2 = op2.getElements();
+ T *elements3 = op3.getElements();
+ for(int i=0; i<size; i++)
+ elements3[i] = elements1[i] / elements2[i];
+ return op3;
+}
+//@}
+
+/**@name Arithmetic operators on dense vector and a constant.
+ These functions create a dense vector as a result. That dense vector will
+ have the same indices as <code>op1</code> and the specified operation is
+ done entry-wise with the given value. */
+//@{
+/// Return the sum of a dense vector and a constant
+template <typename T> inline
+CoinDenseVector<T> operator+(const CoinDenseVector<T>& op1, T value){
+ int size = op1.size();
+ CoinDenseVector<T> op3(size);
+ const T *elements1 = op1.getElements();
+ T *elements3 = op3.getElements();
+ double dvalue = value;
+ for(int i=0; i<size; i++)
+ elements3[i] = elements1[i] + dvalue;
+ return op3;
+}
+
+/// Return the difference of a dense vector and a constant
+template <typename T> inline
+CoinDenseVector<T> operator-(const CoinDenseVector<T>& op1, T value){
+ int size = op1.size();
+ CoinDenseVector<T> op3(size);
+ const T *elements1 = op1.getElements();
+ T *elements3 = op3.getElements();
+ double dvalue = value;
+ for(int i=0; i<size; i++)
+ elements3[i] = elements1[i] - dvalue;
+ return op3;
+}
+
+/// Return the element-wise product of a dense vector and a constant
+template <typename T> inline
+CoinDenseVector<T> operator*(const CoinDenseVector<T>& op1, T value){
+ int size = op1.size();
+ CoinDenseVector<T> op3(size);
+ const T *elements1 = op1.getElements();
+ T *elements3 = op3.getElements();
+ double dvalue = value;
+ for(int i=0; i<size; i++)
+ elements3[i] = elements1[i] * dvalue;
+ return op3;
+}
+
+/// Return the element-wise ratio of a dense vector and a constant
+template <typename T> inline
+CoinDenseVector<T> operator/(const CoinDenseVector<T>& op1, T value){
+ int size = op1.size();
+ CoinDenseVector<T> op3(size);
+ const T *elements1 = op1.getElements();
+ T *elements3 = op3.getElements();
+ double dvalue = value;
+ for(int i=0; i<size; i++)
+ elements3[i] = elements1[i] / dvalue;
+ return op3;
+}
+
+/// Return the sum of a constant and a dense vector
+template <typename T> inline
+CoinDenseVector<T> operator+(T value, const CoinDenseVector<T>& op1){
+ int size = op1.size();
+ CoinDenseVector<T> op3(size);
+ const T *elements1 = op1.getElements();
+ T *elements3 = op3.getElements();
+ double dvalue = value;
+ for(int i=0; i<size; i++)
+ elements3[i] = elements1[i] + dvalue;
+ return op3;
+}
+
+/// Return the difference of a constant and a dense vector
+template <typename T> inline
+CoinDenseVector<T> operator-(T value, const CoinDenseVector<T>& op1){
+ int size = op1.size();
+ CoinDenseVector<T> op3(size);
+ const T *elements1 = op1.getElements();
+ T *elements3 = op3.getElements();
+ double dvalue = value;
+ for(int i=0; i<size; i++)
+ elements3[i] = dvalue - elements1[i];
+ return op3;
+}
+
+/// Return the element-wise product of a constant and a dense vector
+template <typename T> inline
+CoinDenseVector<T> operator*(T value, const CoinDenseVector<T>& op1){
+ int size = op1.size();
+ CoinDenseVector<T> op3(size);
+ const T *elements1 = op1.getElements();
+ T *elements3 = op3.getElements();
+ double dvalue = value;
+ for(int i=0; i<size; i++)
+ elements3[i] = elements1[i] * dvalue;
+ return op3;
+}
+
+/// Return the element-wise ratio of a a constant and dense vector
+template <typename T> inline
+CoinDenseVector<T> operator/(T value, const CoinDenseVector<T>& op1){
+ int size = op1.size();
+ CoinDenseVector<T> op3(size);
+ const T *elements1 = op1.getElements();
+ T *elements3 = op3.getElements();
+ double dvalue = value;
+ for(int i=0; i<size; i++)
+ elements3[i] = dvalue / elements1[i];
+ return op3;
+}
+//@}
+
+#endif