libitpp-dev 4.3.1-6 / usr / include / itpp / fixed / fix_functions.h

/*!
 * \file
 * \brief Definitions of a set of functions for Fix, Fixed, CFix and
 * CFixed classes
 * \author Johan Bergman
 *
 * -------------------------------------------------------------------------
 *
 * Copyright (C) 1995-2010  (see AUTHORS file for a list of contributors)
 *
 * This file is part of IT++ - a C++ library of mathematical, signal
 * processing, speech processing, and communications classes and functions.
 *
 * IT++ 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.
 *
 * IT++ 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 IT++.  If not, see <http://www.gnu.org/licenses/>.
 *
 * -------------------------------------------------------------------------
 */

#ifndef FIX_FUNCTIONS_H
#define FIX_FUNCTIONS_H

#include <itpp/fixed/cfix.h>
#include <itpp/base/vec.h>
#include <itpp/base/mat.h>
#include <itpp/base/array.h>
#include <itpp/base/converters.h>
#include <itpp/itexports.h>


namespace itpp
{

//! \addtogroup fixed
//!@{

//! Return true only if argument is of type Fix or CFix (or an Array/Vec/Mat of Fix or CFix)
template<class T> inline bool is_fix(const T &) {return false;}
//! Return true only if argument is of type Fix or CFix (or an Array/Vec/Mat of Fix or CFix)
template<> inline bool is_fix(const Fix &) {return true;}
//! Return true only if argument is of type Fix or CFix (or an Array/Vec/Mat of Fix or CFix)
template<> inline bool is_fix(const fixvec &) {return true;}
//! Return true only if argument is of type Fix or CFix (or an Array/Vec/Mat of Fix or CFix)
template<> inline bool is_fix(const fixmat &) {return true;}
//! Return true only if argument is of type Fix or CFix (or an Array/Vec/Mat of Fix or CFix)
template<> inline bool is_fix(const CFix &) {return true;}
//! Return true only if argument is of type Fix or CFix (or an Array/Vec/Mat of Fix or CFix)
template<> inline bool is_fix(const cfixvec &) {return true;}
//! Return true only if argument is of type Fix or CFix (or an Array/Vec/Mat of Fix or CFix)
template<> inline bool is_fix(const cfixmat &) {return true;}
//! Return true only if argument is of type Fix or CFix (or an Array/Vec/Mat of Fix or CFix)
template<class T> inline bool is_fix(const Array<T> &) {return is_fix(T());}

//! Set <tt>y = x * pow2(n)</tt> using the quantization mode of \c y
inline void set_fix(Fix &y, double x, int n) {y.set(x, n);}
//! Set <tt>y = x * pow2(n)</tt> using the specified quantization mode \c q
inline void set_fix(Fix &y, double x, int n, q_mode q) {y.set(x, n, q);}
//! Set <tt>y = x * pow2(n)</tt> using the quantization mode of \c y
inline void set_fix(fixvec &y, const vec &x, int n)
{
  y.set_size(x.length());
  for (int i = 0; i < y.size(); i++) y(i).set(x(i), n);
}
//! Set <tt>y = x * pow2(n)</tt> using the specified quantization mode \c q
inline void set_fix(fixvec &y, const vec &x, int n, q_mode q)
{
  y.set_size(x.length());
  for (int i = 0; i < y.size(); i++) y(i).set(x(i), n, q);
}
//! Set <tt>y = x * pow2(n)</tt> using the quantization mode of \c y
inline void set_fix(fixmat &y, const mat &x, int n)
{
  y.set_size(x.rows(), x.cols());
  for (int i = 0; i < y.size(); i++) y(i).set(x(i), n);
}
//! Set <tt>y = x * pow2(n)</tt> using the specified quantization mode \c q
inline void set_fix(fixmat &y, const mat &x, int n, q_mode q)
{
  y.set_size(x.rows(), x.cols());
  for (int i = 0; i < y.size(); i++) y(i).set(x(i), n, q);
}
//! Set <tt>y = x</tt>. Useful in templated code
inline void set_fix(double &y, double x, int) {y = x;}
//! Set <tt>y = x</tt>. Useful in templated code
inline void set_fix(double &y, double x, int, q_mode) {y = x;}
//! Set <tt>y = x</tt>. Useful in templated code
inline void set_fix(vec &y, const vec &x, int) {y = x;}
//! Set <tt>y = x</tt>. Useful in templated code
inline void set_fix(vec &y, const vec &x, int, q_mode) {y = x;}
//! Set <tt>y = x</tt>. Useful in templated code
inline void set_fix(mat &y, const mat &x, int) {y = x;}
//! Set <tt>y = x</tt>. Useful in templated code
inline void set_fix(mat &y, const mat &x, int, q_mode) {y = x;}

//! Set <tt>y = x * pow2(n)</tt> using the quantization mode of \c y
inline void set_fix(CFix &y, std::complex<double> x, int n) {y.set(x, n);}
//! Set <tt>y = (real + i*imag) * pow2(n)</tt> using the quantization mode of \c y
inline void set_fix(CFix &y, double real, double imag, int n) {y.set(real, imag, n);}
//! Set <tt>y = x * pow2(n)</tt> using the specified quantization mode \c q
inline void set_fix(CFix &y, std::complex<double> x, int n, q_mode q) {y.set(x, n, q);}
//! Set <tt>y = (real + i*imag) * pow2(n)</tt> using the specified quantization mode \c q
inline void set_fix(CFix &y, double real, double imag, int n, q_mode q) {y.set(real, imag, n, q);}
//! Set <tt>y = x * pow2(n)</tt> using the quantization mode of \c y
inline void set_fix(cfixvec &y, const cvec &x, int n)
{
  y.set_size(x.length());
  for (int i = 0; i < y.size(); i++) y(i).set(x(i), n);
}
//! Set <tt>y = (real + i*imag) * pow2(n)</tt> using the quantization mode of \c y
inline void set_fix(cfixvec &y, const vec &real, const vec &imag, int n)
{
  it_assert_debug(real.length() == imag.length(), "set_fix: real and imag should have the same size");
  y.set_size(real.length());
  for (int i = 0; i < y.size(); i++) y(i).set(real(i), imag(i), n);
}
//! Set <tt>y = x * pow2(n)</tt> using the specified quantization mode \c q
inline void set_fix(cfixvec &y, const cvec &x, int n, q_mode q)
{
  y.set_size(x.length());
  for (int i = 0; i < y.size(); i++) y(i).set(x(i), n, q);
}
//! Set <tt>y = (real + i*imag) * pow2(n)</tt> using the specified quantization mode \c q
inline void set_fix(cfixvec &y, const vec &real, const vec &imag, int n, q_mode q)
{
  it_assert_debug(real.length() == imag.length(), "set_fix: real and imag should have the same size");
  y.set_size(real.length());
  for (int i = 0; i < y.size(); i++) y(i).set(real(i), imag(i), n, q);
}
//! Set <tt>y = x * pow2(n)</tt> using the quantization mode of \c y
inline void set_fix(cfixmat &y, const cmat &x, int n)
{
  y.set_size(x.rows(), x.cols());
  for (int i = 0; i < y.size(); i++) y(i).set(x(i), n);
}
//! Set <tt>y = (real + i*imag) * pow2(n)</tt> using the quantization mode of \c y
inline void set_fix(cfixmat &y, const mat &real, const mat &imag, int n)
{
  it_assert_debug(real.rows() == imag.rows() && real.cols() == imag.cols(), "set_fix: real and imag should have the same size");
  y.set_size(real.rows(), real.cols());
  for (int i = 0; i < y.size(); i++) y(i).set(real(i), imag(i), n);
}
//! Set <tt>y = x * pow2(n)</tt> using the specified quantization mode \c q
inline void set_fix(cfixmat &y, const cmat &x, int n, q_mode q)
{
  y.set_size(x.rows(), x.cols());
  for (int i = 0; i < y.size(); i++) y(i).set(x(i), n, q);
}
//! Set <tt>y = (real + i*imag) * pow2(n)</tt> using the specified quantization mode \c q
inline void set_fix(cfixmat &y, const mat &real, const mat &imag, int n, q_mode q)
{
  it_assert_debug(real.rows() == imag.rows() && real.cols() == imag.cols(), "set_fix: real and imag should have the same size");
  y.set_size(real.rows(), real.cols());
  for (int i = 0; i < y.size(); i++) y(i).set(real(i), imag(i), n, q);
}
//! Set <tt>y = x</tt>. Useful in templated code
inline void set_fix(std::complex<double> &y, const std::complex<double> &x, int) {y = x;}
//! Set <tt>y = real + i*imag</tt>. Useful in templated code
inline void set_fix(std::complex<double> &y, double real, double imag, int) {y = std::complex<double>(real, imag);}
//! Set <tt>y = x</tt>. Useful in templated code
inline void set_fix(std::complex<double> &y, const std::complex<double> &x, int, q_mode) {y = x;}
//! Set <tt>y = real + i*imag</tt>. Useful in templated code
inline void set_fix(std::complex<double> &y, double real, double imag, int, q_mode) {y = std::complex<double>(real, imag);}
//! Set <tt>y = x</tt>. Useful in templated code
inline void set_fix(cvec &y, const cvec &x, int) {y = x;}
//! Set <tt>y = real + i*imag</tt>. Useful in templated code
inline void set_fix(cvec &y, const vec &real, const vec &imag, int) {y = to_cvec(real, imag);}
//! Set <tt>y = x</tt>. Useful in templated code
inline void set_fix(cvec &y, const cvec &x, int, q_mode) {y = x;}
//! Set <tt>y = real + i*imag</tt>. Useful in templated code
inline void set_fix(cvec &y, const vec &real, const vec &imag, int, q_mode) {y = to_cvec(real, imag);}
//! Set <tt>y = x</tt>. Useful in templated code
inline void set_fix(cmat &y, const cmat &x, int) {y = x;}
//! Set <tt>y = real + i*imag</tt>. Useful in templated code
inline void set_fix(cmat &y, const mat &real, const mat &imag, int) {y = to_cmat(real, imag);}
//! Set <tt>y = x</tt>. Useful in templated code
inline void set_fix(cmat &y, const cmat &x, int, q_mode) {y = x;}
//! Set <tt>y = real + i*imag</tt>. Useful in templated code
inline void set_fix(cmat &y, const mat &real, const mat &imag, int, q_mode) {y = to_cmat(real, imag);}

//! Call set_fix for each Array element
template<class T1, class T2> inline void set_fix(Array<T1> &y, const Array<T2> &x, int n)
{
  y.set_size(x.size());
  for (int i = 0; i < y.size(); i++) set_fix(y(i), x(i), n);
}
//! Call set_fix for each Array element
template<class T1, class T2> inline void set_fix(Array<T1> &y, const Array<T2> &real, const Array<T2> &imag, int n)
{
  it_assert_debug(real.size() == imag.size(), "set_fix: real and imag should have the same size");
  y.set_size(real.size());
  for (int i = 0; i < y.size(); i++) set_fix(y(i), real(i), imag(i), n);
}
//! Call set_fix for each Array element
template<class T1, class T2> inline void set_fix(Array<T1> &y, const Array<T2> &x, int n, q_mode q)
{
  y.set_size(x.size());
  for (int i = 0; i < y.size(); i++) set_fix(y(i), x(i), n, q);
}
//! Call set_fix for each Array element
template<class T1, class T2> inline void set_fix(Array<T1> &y, const Array<T2> &real, const Array<T2> &imag, int n, q_mode q)
{
  it_assert_debug(real.size() == imag.size(), "set_fix: real and imag should have the same size");
  y.set_size(real.size());
  for (int i = 0; i < y.size(); i++) set_fix(y(i), real(i), imag(i), n, q);
}

//! Left shift \c n bits
inline void lshift_fix(Fix &y, int n) {y.lshift(n);}
//! Right shift \c n bits using the quantization mode of \c y
inline void rshift_fix(Fix &y, int n) {y.rshift(n);}
//! Right shift \c n bits using the specified quantization mode \c q
inline void rshift_fix(Fix &y, int n, q_mode q) {y.rshift(n, q);}
//! Left shift \c n bits
inline void lshift_fix(fixvec &y, int n)
{for(int i = 0; i < y.size(); i++) y(i).lshift(n);}
//! Right shift \c n bits using the quantization mode of \c y
inline void rshift_fix(fixvec &y, int n)
{for(int i = 0; i < y.size(); i++) y(i).rshift(n);}
//! Right shift \c n bits using the specified quantization mode \c q
inline void rshift_fix(fixvec &y, int n, q_mode q)
{for(int i = 0; i < y.size(); i++) y(i).rshift(n, q);}
//! Left shift \c n bits
inline void lshift_fix(fixmat &y, int n)
{for(int i = 0; i < y.size(); i++) y(i).lshift(n);}
//! Right shift \c n bits using the quantization mode of \c y
inline void rshift_fix(fixmat &y, int n)
{for(int i = 0; i < y.size(); i++) y(i).rshift(n);}
//! Right shift \c n bits using the specified quantization mode \c q
inline void rshift_fix(fixmat &y, int n, q_mode q)
{for(int i = 0; i < y.size(); i++) y(i).rshift(n, q);}
//! Dummy function useful in templated code
inline void lshift_fix(double &, int) {}
//! Dummy function useful in templated code
inline void rshift_fix(double &, int) {}
//! Dummy function useful in templated code
inline void rshift_fix(double &, int, q_mode) {}
//! Dummy function useful in templated code
inline void lshift_fix(vec &, int) {}
//! Dummy function useful in templated code
inline void rshift_fix(vec &, int) {}
//! Dummy function useful in templated code
inline void rshift_fix(vec &, int, q_mode) {}
//! Dummy function useful in templated code
inline void lshift_fix(mat &, int) {}
//! Dummy function useful in templated code
inline void rshift_fix(mat &, int) {}
//! Dummy function useful in templated code
inline void rshift_fix(mat &, int, q_mode) {}
//! Left shift \c n bits
inline void lshift_fix(CFix &y, int n) {y.lshift(n);}
//! Right shift \c n bits using the quantization mode of \c y
inline void rshift_fix(CFix &y, int n) {y.rshift(n);}
//! Right shift \c n bits using the specified quantization mode \c q
inline void rshift_fix(CFix &y, int n, q_mode q) {y.rshift(n, q);}
//! Left shift \c n bits
inline void lshift_fix(cfixvec &y, int n)
{for(int i = 0; i < y.size(); i++) y(i).lshift(n);}
//! Right shift \c n bits using the quantization mode of \c y
inline void rshift_fix(cfixvec &y, int n)
{for(int i = 0; i < y.size(); i++) y(i).rshift(n);}
//! Right shift \c n bits using the specified quantization mode \c q
inline void rshift_fix(cfixvec &y, int n, q_mode q)
{for(int i = 0; i < y.size(); i++) y(i).rshift(n, q);}
//! Left shift \c n bits
inline void lshift_fix(cfixmat &y, int n)
{for(int i = 0; i < y.size(); i++) y(i).lshift(n);}
//! Right shift \c n bits using the quantization mode of \c y
inline void rshift_fix(cfixmat &y, int n)
{for(int i = 0; i < y.size(); i++) y(i).rshift(n);}
//! Right shift \c n bits using the specified quantization mode \c q
inline void rshift_fix(cfixmat &y, int n, q_mode q)
{for(int i = 0; i < y.size(); i++) y(i).rshift(n, q);}
//! Dummy function useful in templated code
inline void lshift_fix(std::complex<double> &, int) {}
//! Dummy function useful in templated code
inline void rshift_fix(std::complex<double> &, int) {}
//! Dummy function useful in templated code
inline void rshift_fix(std::complex<double> &, int, q_mode) {}
//! Dummy function useful in templated code
inline void lshift_fix(cvec &, int) {}
//! Dummy function useful in templated code
inline void rshift_fix(cvec &, int) {}
//! Dummy function useful in templated code
inline void rshift_fix(cvec &, int, q_mode) {}
//! Dummy function useful in templated code
inline void lshift_fix(cmat &, int) {}
//! Dummy function useful in templated code
inline void rshift_fix(cmat &, int) {}
//! Dummy function useful in templated code
inline void rshift_fix(cmat &, int, q_mode) {}
//! Call lshift_fix for each Array element
template<class T> inline void lshift_fix(Array<T> &y, int n)
{for(int i = 0; i < y.size(); i++) lshift_fix(y(i), n);}
//! Call rshift_fix for each Array element
template<class T> inline void rshift_fix(Array<T> &y, int n)
{for(int i = 0; i < y.size(); i++) rshift_fix(y(i), n);}
//! Call rshift_fix for each Array element
template<class T> inline void rshift_fix(Array<T> &y, int n, q_mode q)
{for(int i = 0; i < y.size(); i++) rshift_fix(y(i), n, q);}

//! If x is a fixed-point variable, assert that x has the specified shift value, otherwise do nothing
inline void assert_fixshift(double, int) {}
//! If x is a fixed-point variable, assert that x has the specified shift value, otherwise do nothing
inline void assert_fixshift(const std::complex<double> &, int) {}
//! If x is a fixed-point variable, assert that x has the specified shift value, otherwise do nothing
inline void assert_fixshift(const Fix &x, int shift)
{it_assert_debug(x.get_shift() == shift, "Shift should be " + to_str(shift) + " but it is " + to_str(x.get_shift()) + ".");}
//! If x is a fixed-point variable, assert that x has the specified shift value, otherwise do nothing
inline void assert_fixshift(const CFix &x, int shift)
{it_assert_debug(x.get_shift() == shift, "Shift should be " + to_str(shift) + " but it is " + to_str(x.get_shift()) + ".");}

//! Converts a fixvec to vec
ITPP_EXPORT vec to_vec(const fixvec &v);
//! Converts a cfixvec to cvec
ITPP_EXPORT cvec to_cvec(const cfixvec &v);
//! Converts a fixmat to mat
ITPP_EXPORT mat to_mat(const fixmat &m);
//! Converts a cfixmat to cmat
ITPP_EXPORT cmat to_cmat(const cfixmat &m);

//! \cond

//! Help class used by the conversion function to<T>(const Array<...> &x). To be merged with Convert?
template<class T, class U>
class ConvertU2T
{
public:
  typedef T result;
};
//! Template specialization for Array<T>
template<class T, class U>
class ConvertU2T<T, Array<U> >
{
public:
  typedef Array<typename ConvertU2T<T, U>::result> result;  // Recursive
};
//! Template specialization for Vec<T>
template<class T, class U>
class ConvertU2T<T, Vec<U> >
{
public:
  typedef Vec<T> result;
};
//! Template specialization for Mat<T>
template<class T, class U>
class ConvertU2T<T, Mat<U> >
{
public:
  typedef Mat<T> result;
};

//! \endcond

//! Convert double to T
template<class T> inline T to(double x) {return T(x);}
//! Convert Fix to T
template<class T> inline T to(const Fix &x) {return T(x);}
//! Convert std::complex<double> to T
template<class T> inline T to(const std::complex<double> &x) {return T(x);}
//! Convert CFix to T
template<class T> inline T to(const CFix &x) {return T(x);}
//! Convert double (real and imaginary parts) to T
template<class T> inline T to(double real, double imag) {return T(real, imag);}
//! Convert Fix (real and imaginary parts) to T
template<class T> inline T to(const Fix &real, const Fix &imag) {return T(real, imag);}

//! Convert Vec<U> to Vec<T>
template<class T, class U> Vec<T> to(const Vec<U> &x)
{
  Vec<T> y(x.length());
  for (int i = 0; i < x.length(); i++) {
    y(i) = T(x(i));
  }
  return y;
}
//! Convert vec to vec
template<> inline vec to<double>(const vec &x) {return x;}
//! Convert cvec to cvec
template<> inline cvec to<std::complex<double> >(const cvec &x) {return x;}
//! Convert fixvec to fixvec
template<> inline fixvec to<Fix>(const fixvec &x) {return x;}
//! Convert cfixvec to cfixvec
template<> inline cfixvec to<CFix>(const cfixvec &x) {return x;}

//! Convert Vec<U> (real and imaginary parts) to Vec<T>
template<class T, class U> Vec<T> to(const Vec<U> &real, const Vec<U> &imag)
{
  it_assert_debug(real.length() == imag.length(), "to: real and imag should have the same size");
  Vec<T> y(real.length());
  for (int i = 0; i < real.length(); i++) {
    y(i) = T(real(i), imag(i));
  }
  return y;
}

//! Convert Mat<U> to Mat<T>
template<class T, class U> Mat<T> to(const Mat<U> &x)
{
  Mat<T> y(x.rows(), x.cols());
  for (int i = 0; i < x.rows(); i++) {
    for (int j = 0; j < x.cols(); j++) {
      y(i, j) = T(x(i, j));
    }
  }
  return y;
}
//! Convert mat to mat
template<> inline mat to<double>(const mat &x) {return x;}
//! Convert cmat to cmat
template<> inline cmat to<std::complex<double> >(const cmat &x) {return x;}
//! Convert fixmat to fixmat
template<> inline fixmat to<Fix>(const fixmat &x) {return x;}
//! Convert cfixmat to cfixmat
template<> inline cfixmat to<CFix>(const cfixmat &x) {return x;}

//! Convert Mat<U> (real and imaginary parts) to Mat<T>
template<class T, class U> Mat<T> to(const Mat<U> &real, const Mat<U> &imag)
{
  it_assert_debug(real.rows() == imag.rows() && real.cols() == imag.cols(), "to: real and imag should have the same size");
  Mat<T> y(real.rows(), real.cols());
  for (int i = 0; i < real.rows(); i++) {
    for (int j = 0; j < real.cols(); j++) {
      y(i, j) = T(real(i, j), imag(i, j));
    }
  }
  return y;
}

//! Convert Array<U>, where U can be an Array/Vec/Mat, to a corresponding Array with T elements
template<class T, class U>
Array<typename ConvertU2T<T, U>::result> to(const Array<U> &x)
{
  Array<typename ConvertU2T<T, U>::result> y(x.size());
  for (int i = 0; i < x.size(); i++) {
    y(i) = to<T>(x(i));
  }
  return y;
}

//! Convert Array<U> (real and imaginary parts), where U can be an Array/Vec/Mat, to a corresponding Array with T elements
template<class T, class U>
Array<typename ConvertU2T<T, U>::result> to(const Array<U> &real, const Array<U> &imag)
{
  it_assert_debug(real.size() == imag.size(), "to: real and imag should have the same size");
  Array<typename ConvertU2T<T, U>::result> y(real.size());
  for (int i = 0; i < real.size(); i++) {
    y(i) = to<T>(real(i), imag(i));
  }
  return y;
}

//! Convert Fix to double by multiplying the bit representation with pow2(-shift)
inline double unfix(const Fix &x) {return x.unfix();}
//! Convert CFix to std::complex<double> by multiplying the bit representation with pow2(-shift)
inline std::complex<double> unfix(const CFix &x) {return x.unfix();}
//! Convert fixvec to vec by multiplying the bit representations with pow2(-shift)
inline vec unfix(const fixvec &x) {return to_vec(x);}
//! Convert cfixvec to cvec by multiplying the bit representations with pow2(-shift)
inline cvec unfix(const cfixvec &x) {return to_cvec(x);}
//! Convert fixmat to mat by multiplying the bit representations with pow2(-shift)
inline mat unfix(const fixmat &x) {return to_mat(x);}
//! Convert cfixmat to cmat by multiplying the bit representations with pow2(-shift)
inline cmat unfix(const cfixmat &x) {return to_cmat(x);}

//! Convert double to double i.e. do nothing
inline double unfix(double x) {return x;}
//! Convert std::complex<double> to std::complex<double> i.e. do nothing
inline std::complex<double> unfix(const std::complex<double> &x) {return x;}
//! Convert vec to vec i.e. do nothing
inline vec unfix(const vec &x) {return x;}
//! Convert cvec to cvec i.e. do nothing
inline cvec unfix(const cvec &x) {return x;}
//! Convert mat to mat i.e. do nothing
inline mat unfix(const mat &x) {return x;}
//! Convert cmat to cmat i.e. do nothing
inline cmat unfix(const cmat &x) {return x;}

//! \cond

//! Help class used by the conversion function unfix(const Array<T> &x)
template<class T>
class Convert
{
public:
  typedef double to_double;
};
//! Template specialization for CFix
template<>
class Convert<CFix>
{
public:
  typedef std::complex<double> to_double;
};
//! Template specialization for std::complex<T>
template<class T>
class Convert<std::complex<T> >
{
public:
  typedef std::complex<double> to_double;
};
//! Template specialization for Array<T>
template<class T>
class Convert<Array<T> >
{
public:
  typedef Array<typename Convert<T>::to_double> to_double;  // Recursive
};
//! Template specialization for Vec<T>
template<class T>
class Convert<Vec<T> >
{
public:
  typedef Vec<typename Convert<T>::to_double> to_double;  // Recursive
};
//! Template specialization for Mat<T>
template<class T>
class Convert<Mat<T> >
{
public:
  typedef Mat<typename Convert<T>::to_double> to_double;  // Recursive
};

//! \endcond

//! Convert floating- or fixed-point Array to floating-point Array
template<class T>
Array<typename Convert<T>::to_double> unfix(const Array<T> &x)
{
  Array<typename Convert<T>::to_double> y(x.size());
  for (int i = 0; i < x.size(); i++) {
    y(i) = unfix(x(i));
  }
  return y;
}

//! Absolute value
ITPP_EXPORT Fix abs(const Fix &x);
//! Real part of complex value
ITPP_EXPORT Fix real(const CFix &x);
//! Imaginary part of complex value
ITPP_EXPORT Fix imag(const CFix &x);
//! Conjugate of complex value
ITPP_EXPORT CFix conj(const CFix &x);

//!@}

} // namespace itpp

#endif // #ifndef FIX_FUNCTIONS_H