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/*
//
// Copyright 2010-2012 SRI International
//
// Copyright 2010 Torsten Rohlfing
//
// This file is part of the Computational Morphometry Toolkit.
//
// http://www.nitrc.org/projects/cmtk/
//
// The Computational Morphometry Toolkit is free software: you can
// redistribute it and/or modify it under the terms of the GNU General Public
// License as published by the Free Software Foundation, either version 3 of
// the License, or (at your option) any later version.
//
// The Computational Morphometry Toolkit is distributed in the hope that it
// will be useful, but WITHOUT ANY WARRANTY; without even the implied
// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License along
// with the Computational Morphometry Toolkit. If not, see
// <http://www.gnu.org/licenses/>.
//
// $Revision: 5436 $
//
// $LastChangedDate: 2018-12-10 19:01:20 -0800 (Mon, 10 Dec 2018) $
//
// $LastChangedBy: torstenrohlfing $
//
*/
#ifndef __cmtkFixedArray_h_included_
#define __cmtkFixedArray_h_included_
#include <cmtkconfig.h>
#include <Base/cmtkDataTypeTraits.h>
#include <System/cmtkSmartPtr.h>
#include <System/cmtkSmartConstPtr.h>
#include <algorithm>
#include <iostream>
namespace
cmtk
{
/// Class for fixed-size n-dimensional array.
template<size_t NDIM,typename T=int>
class FixedArray
{
public:
/// This class.
typedef FixedArray<NDIM,T> Self;
/// Type of the stored values.
typedef T ValueType;
/// Smart pointer to this class.
typedef SmartPointer<Self> SmartPtr;
/// Smart pointer-to-const to this class.
typedef SmartConstPointer<Self> SmartConstPtr;
/// Return vector size.
size_t Size() const { return NDIM; }
/// Zero operator.
static const Self Zero()
{
Self v;
std::fill( v.begin(), v.end(), DataTypeTraits<T>::Zero() );
return v;
}
/** Default constructor.
* note for improved efficiency, this does NOT initialize the data array.
*/
FixedArray() {}
/// Initialization constructor.
explicit FixedArray( const T& initValue )
{
std::fill( this->begin(), this->end(), initValue );
}
/// Type conversion constructor template.
template<class T2>
FixedArray( const FixedArray<NDIM,T2>& rhs )
{
for ( size_t i = 0; i < NDIM; ++i )
this->m_Data[i] = static_cast<T>( rhs[i] );
}
/// Make array from const pointer.
template<class T2> static Self FromPointer( const T2 *const ptr )
{
Self v;
for ( size_t i = 0; i < NDIM; ++i )
v[i] = ptr[i];
return v;
}
/// Get element reference.
T& operator[]( const size_t i )
{
return this->m_Data[i];
}
/// Get const element reference.
const T& operator[]( const size_t i ) const
{
return this->m_Data[i];
}
/// Equality operator.
bool operator==( const Self& rhs ) const
{
for ( size_t i = 0; i<NDIM; ++i )
if ( this->m_Data[i] != rhs.m_Data[i] )
return false;
return true;
}
/// Inequality operator.
bool operator!=( const Self& rhs ) const
{
return !this->operator==( rhs );
}
/// Pointer to first array element.
T* begin()
{
return this->m_Data;
}
/// Pointer behind last array element.
T* end()
{
return this->m_Data+NDIM;
}
/// Pointer to first array element.
const T* begin() const
{
return this->m_Data;
}
/// Pointer behind last array element.
const T* end() const
{
return this->m_Data+NDIM;
}
protected:
/// The actual index array.
T m_Data[NDIM];
};
/// Stream output operator.
template<size_t NDIM,typename T>
std::ostream& operator<<( std::ostream& stream, const FixedArray<NDIM,T>& index )
{
for ( size_t i = 0; i < NDIM; ++i )
stream << index[i] << " ";
return stream;
}
/// Stream input operator.
template<size_t NDIM,typename T>
std::istream& operator>>( std::istream& stream, FixedArray<NDIM,T>& index )
{
for ( size_t i = 0; i < NDIM; ++i )
stream >> index[i];
return stream;
}
} // namespace cmtk
#endif // #ifndef __cmtkFixedArray_h_included_
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