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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