comparison armadillo-3.900.4/include/armadillo_bits/op_diagmat_meat.hpp @ 49:1ec0e2823891

Switch to using subrepo copies of qm-dsp, nnls-chroma, vamp-plugin-sdk; update Armadillo version; assume build without external BLAS/LAPACK

+// Copyright (C) 2008-2012 NICTA (www.nicta.com.au)
+// Copyright (C) 2008-2012 Conrad Sanderson
+// 
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this
+// file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+
+//! \addtogroup op_diagmat
+//! @{
+
+
+
+template<typename T1>
+inline
+void
+op_diagmat::apply(Mat<typename T1::elem_type>& out, const Op<T1, op_diagmat>& X)
+  {
+  arma_extra_debug_sigprint();
+  
+  typedef typename T1::elem_type eT;
+  
+  const Proxy<T1> P(X.m);
+  
+  const uword n_rows = P.get_n_rows();
+  const uword n_cols = P.get_n_cols();
+  
+  const bool P_is_vec = (n_rows == 1) || (n_cols == 1);
+  
+  
+  if(P.is_alias(out) == false)
+    {
+    if(P_is_vec)    // generate a diagonal matrix out of a vector
+      {
+      const uword N = (n_rows == 1) ? n_cols : n_rows;
+      
+      out.zeros(N, N);
+      
+      if(Proxy<T1>::prefer_at_accessor == false)
+        {
+        typename Proxy<T1>::ea_type P_ea = P.get_ea();
+        
+        for(uword i=0; i < N; ++i) { out.at(i,i) = P_ea[i]; }
+        }
+      else
+        {
+        if(n_rows == 1)
+          {
+          for(uword i=0; i < N; ++i) { out.at(i,i) = P.at(0,i); }
+          }
+        else
+          {
+          for(uword i=0; i < N; ++i) { out.at(i,i) = P.at(i,0); }
+          }
+        }
+      }
+    else   // generate a diagonal matrix out of a matrix
+      {
+      arma_debug_check( (n_rows != n_cols), "diagmat(): given matrix is not square" );
+      
+      out.zeros(n_rows, n_rows);
+      
+      for(uword i=0; i < n_rows; ++i) { out.at(i,i) = P.at(i,i); }
+      }
+    }
+  else   // we have aliasing
+    {
+    if(P_is_vec)   // generate a diagonal matrix out of a vector
+      {
+      const uword N = (n_rows == 1) ? n_cols : n_rows;
+      
+      podarray<eT> tmp(N);
+      eT* tmp_mem = tmp.memptr();
+      
+      if(Proxy<T1>::prefer_at_accessor == false)
+        {
+        typename Proxy<T1>::ea_type P_ea = P.get_ea();
+        
+        for(uword i=0; i < N; ++i) { tmp_mem[i] = P_ea[i]; }
+        }
+      else
+        {
+        if(n_rows == 1)
+          {
+          for(uword i=0; i < N; ++i) { tmp_mem[i] = P.at(0,i); }
+          }
+        else
+          {
+          for(uword i=0; i < N; ++i) { tmp_mem[i] = P.at(i,0); }
+          }
+        }
+      
+      out.zeros(N, N);
+      
+      for(uword i=0; i < N; ++i) { out.at(i,i) = tmp_mem[i]; }
+      }
+    else   // generate a diagonal matrix out of a matrix
+      {
+      arma_debug_check( (n_rows != n_cols), "diagmat(): given matrix is not square" );
+      
+      if( (Proxy<T1>::has_subview == false) && (Proxy<T1>::fake_mat == false) )
+        {
+        // NOTE: we have aliasing and it's not due to a subview, hence we're assuming that the output matrix already has the correct size
+        
+        for(uword i=0; i < n_rows; ++i)
+          {
+          const eT val = P.at(i,i);
+          
+          arrayops::inplace_set(out.colptr(i), eT(0), n_rows);
+          
+          out.at(i,i) = val;
+          }
+        }
+      else
+        {
+        podarray<eT> tmp(n_rows);
+        eT* tmp_mem = tmp.memptr();
+        
+        for(uword i=0; i < n_rows; ++i)  { tmp_mem[i] = P.at(i,i); }
+        
+        out.zeros(n_rows, n_rows);
+        
+        for(uword i=0; i < n_rows; ++i)  { out.at(i,i) = tmp_mem[i]; }
+        }
+      }
+    }
+  }
+
+
+
+//! @}