comparison armadillo-2.4.4/include/armadillo_bits/diagmat_proxy.hpp @ 0:8b6102e2a9b0

Armadillo Library

+// Copyright (C) 2008-2011 NICTA (www.nicta.com.au)
+// Copyright (C) 2008-2011 Conrad Sanderson
+// 
+// This file is part of the Armadillo C++ library.
+// It is provided without any warranty of fitness
+// for any purpose. You can redistribute this file
+// and/or modify it under the terms of the GNU
+// Lesser General Public License (LGPL) as published
+// by the Free Software Foundation, either version 3
+// of the License or (at your option) any later version.
+// (see http://www.opensource.org/licenses for more info)
+
+
+//! \addtogroup diagmat_proxy
+//! @{
+
+
+
+template<typename T1>
+class diagmat_proxy
+  {
+  public:
+  
+  typedef typename T1::elem_type                   elem_type;
+  typedef typename get_pod_type<elem_type>::result pod_type;
+  
+  inline diagmat_proxy(const Base<typename T1::elem_type,T1>& X)
+    : P       ( X.get_ref() )
+    , P_is_vec( (P.get_n_rows() == 1) || (P.get_n_cols() == 1) )
+    , n_elem  ( P_is_vec ? P.get_n_elem() : (std::min)(P.get_n_elem(), P.get_n_rows()) )
+    {
+    arma_extra_debug_sigprint();
+    
+    arma_debug_check
+      (
+      (P_is_vec == false) && (P.get_n_rows() != P.get_n_cols()),
+      "diagmat(): only vectors and square matrices are accepted"
+      );
+    }
+  
+  
+  arma_inline
+  elem_type
+  operator[](const uword i) const
+    {
+    if( (Proxy<T1>::prefer_at_accessor == true) || (P_is_vec == false) )
+      {
+      return P.at(i,i);
+      }
+    else
+      {
+      return P[i];
+      }
+    }
+  
+  
+  arma_inline
+  elem_type
+  at(const uword row, const uword col) const
+    {
+    if(row == col)
+      {
+      if( (Proxy<T1>::prefer_at_accessor == true) || (P_is_vec == false) )
+        {
+        return P.at(row,row);
+        }
+      else
+        {
+        return P[row];
+        }
+      }
+    else
+      {
+      return elem_type(0);
+      }
+    }
+  
+  
+  const Proxy<T1> P;
+  const bool      P_is_vec;
+  const uword     n_elem;
+  };
+
+
+
+template<typename eT>
+class diagmat_proxy< Mat<eT> >
+  {
+  public:
+  
+  typedef          eT                              elem_type;
+  typedef typename get_pod_type<elem_type>::result pod_type;
+  
+  
+  inline diagmat_proxy(const Mat<eT>& X)
+    : P(X)
+    , P_is_vec( (P.n_rows == 1) || (P.n_cols == 1) )
+    , n_elem( P_is_vec ? P.n_elem : (std::min)(P.n_elem, P.n_rows) )
+    {
+    arma_extra_debug_sigprint();
+    
+    arma_debug_check
+      (
+      (P_is_vec == false) && (P.n_rows != P.n_cols),
+      "diagmat(): only vectors and square matrices are accepted"
+      );
+    }
+  
+  
+  arma_inline elem_type operator[] (const uword i)                    const { return P_is_vec ? P[i] : P.at(i,i);                                         }
+  arma_inline elem_type at         (const uword row, const uword col) const { return (row == col) ? ( P_is_vec ? P[row] : P.at(row,row) ) : elem_type(0); }
+
+  const Mat<eT>& P;
+  const bool     P_is_vec;
+  const uword    n_elem;
+  };
+
+
+
+template<typename eT>
+class diagmat_proxy< Row<eT> >
+  {
+  public:
+  
+  typedef          eT                              elem_type;
+  typedef typename get_pod_type<elem_type>::result pod_type;
+  
+  
+  inline diagmat_proxy(const Row<eT>& X)
+    : P(X)
+    , P_is_vec(true)
+    , n_elem(P.n_elem)
+    {
+    arma_extra_debug_sigprint();
+    }
+  
+  
+  arma_inline elem_type operator[] (const uword i)                    const { return P[i];                                                                }
+  arma_inline elem_type at         (const uword row, const uword col) const { return (row == col) ? P[row] : elem_type(0); }
+
+
+  const Row<eT>& P;
+  const bool     P_is_vec;
+  const uword    n_elem;
+  };
+
+
+
+template<typename eT>
+class diagmat_proxy< Col<eT> >
+  {
+  public:
+  
+  typedef          eT                              elem_type;
+  typedef typename get_pod_type<elem_type>::result pod_type;
+  
+  
+  inline diagmat_proxy(const Col<eT>& X)
+    : P(X)
+    , P_is_vec(true)
+    , n_elem(P.n_elem)
+    {
+    arma_extra_debug_sigprint();
+    }
+  
+  
+  arma_inline elem_type operator[] (const uword i)                    const { return P[i];                                 }
+  arma_inline elem_type at         (const uword row, const uword col) const { return (row == col) ? P[row] : elem_type(0); }
+  
+
+  const Col<eT>& P;
+  const bool     P_is_vec;
+  const uword    n_elem;
+  };
+
+
+
+template<typename T1>
+class diagmat_proxy_check
+  {
+  public:
+  
+  typedef typename T1::elem_type                   elem_type;
+  typedef typename get_pod_type<elem_type>::result pod_type;
+  
+  inline diagmat_proxy_check(const Base<typename T1::elem_type,T1>& X, const Mat<typename T1::elem_type>& out)
+    : P(X.get_ref())
+    , P_is_vec( (P.n_rows == 1) || (P.n_cols == 1) )
+    , n_elem( P_is_vec ? P.n_elem : (std::min)(P.n_elem, P.n_rows) )
+    {
+    arma_extra_debug_sigprint();
+    arma_ignore(out);
+    
+    arma_debug_check
+      (
+      (P_is_vec == false) && (P.n_rows != P.n_cols),
+      "diagmat(): only vectors and square matrices are accepted"
+      );
+    }
+  
+  
+  arma_inline elem_type operator[] (const uword i)                    const { return P_is_vec ? P[i] : P.at(i,i);                                         }
+  arma_inline elem_type at         (const uword row, const uword col) const { return (row == col) ? ( P_is_vec ? P[row] : P.at(row,row) ) : elem_type(0); }
+  
+
+  const Mat<elem_type> P;
+  const bool           P_is_vec;
+  const uword          n_elem;
+  };
+
+
+
+template<typename eT>
+class diagmat_proxy_check< Mat<eT> >
+  {
+  public:
+  
+  typedef          eT                              elem_type;
+  typedef typename get_pod_type<elem_type>::result pod_type;
+  
+  
+  inline diagmat_proxy_check(const Mat<eT>& X, const Mat<eT>& out)
+    : P_local ( (&X == &out) ? new Mat<eT>(X) : 0  )
+    , P       ( (&X == &out) ? (*P_local)     : X  )
+    , P_is_vec( (P.n_rows == 1) || (P.n_cols == 1) )
+    , n_elem  ( P_is_vec ? P.n_elem : (std::min)(P.n_elem, P.n_rows) )
+    {
+    arma_extra_debug_sigprint();
+    
+    arma_debug_check
+      (
+      (P_is_vec == false) && (P.n_rows != P.n_cols),
+      "diagmat(): only vectors and square matrices are accepted"
+      );
+    }
+  
+  inline ~diagmat_proxy_check()
+    {
+    if(P_local)
+      {
+      delete P_local;
+      }
+    }
+  
+  
+  arma_inline elem_type operator[] (const uword i)                    const { return P_is_vec ? P[i] : P.at(i,i);                                         }
+  arma_inline elem_type at         (const uword row, const uword col) const { return (row == col) ? ( P_is_vec ? P[row] : P.at(row,row) ) : elem_type(0); }
+  
+
+  const Mat<eT>* P_local;
+  const Mat<eT>& P;
+  const bool     P_is_vec;
+  const uword    n_elem;
+  };
+
+
+
+template<typename eT>
+class diagmat_proxy_check< Row<eT> >
+  {
+  public:
+  
+  typedef          eT                              elem_type;
+  typedef typename get_pod_type<elem_type>::result pod_type;
+  
+  inline diagmat_proxy_check(const Row<eT>& X, const Mat<eT>& out)
+    : P_local ( (&X == reinterpret_cast<const Row<eT>*>(&out)) ? new Row<eT>(X) : 0 )
+    , P       ( (&X == reinterpret_cast<const Row<eT>*>(&out)) ? (*P_local)     : X )
+    , P_is_vec(true)
+    , n_elem  (P.n_elem)
+    {
+    arma_extra_debug_sigprint();
+    }
+  
+  
+  inline ~diagmat_proxy_check()
+    {
+    if(P_local)
+      {
+      delete P_local;
+      }
+    }
+  
+  
+  arma_inline elem_type operator[] (const uword i)                    const { return P[i];                                 }
+  arma_inline elem_type at         (const uword row, const uword col) const { return (row == col) ? P[row] : elem_type(0); }
+  
+  
+  const Row<eT>* P_local;
+  const Row<eT>& P;
+  const bool     P_is_vec;
+  const uword    n_elem;
+  };
+
+
+
+
+
+
+template<typename eT>
+class diagmat_proxy_check< Col<eT> >
+  {
+  public:
+  
+  typedef          eT                              elem_type;
+  typedef typename get_pod_type<elem_type>::result pod_type;
+  
+  inline diagmat_proxy_check(const Col<eT>& X, const Mat<eT>& out)
+    : P_local ( (&X == reinterpret_cast<const Col<eT>*>(&out)) ? new Col<eT>(X) : 0 )
+    , P       ( (&X == reinterpret_cast<const Col<eT>*>(&out)) ? (*P_local)     : X )
+    , P_is_vec(true)
+    , n_elem  (P.n_elem)
+    {
+    arma_extra_debug_sigprint();
+    }
+  
+  
+  inline ~diagmat_proxy_check()
+    {
+    if(P_local)
+      {
+      delete P_local;
+      }
+    }
+  
+  
+  arma_inline elem_type operator[] (const uword i)                    const { return P[i];                                 }
+  arma_inline elem_type at         (const uword row, const uword col) const { return (row == col) ? P[row] : elem_type(0); }
+  
+  
+  const Col<eT>* P_local;
+  const Col<eT>& P;
+  const bool     P_is_vec;
+  const uword    n_elem;
+  };
+
+
+
+//! @}