Move into version control

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diff --git a/src/armadillo/include/armadillo_bits/op_sum_meat.hpp b/src/armadillo/include/armadillo_bits/op_sum_meat.hpp
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+++ b/src/armadillo/include/armadillo_bits/op_sum_meat.hpp
@@ -0,0 +1,430 @@
+// SPDX-License-Identifier: Apache-2.0
+// 
+// Copyright 2008-2016 Conrad Sanderson (http://conradsanderson.id.au)
+// Copyright 2008-2016 National ICT Australia (NICTA)
+// 
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+// http://www.apache.org/licenses/LICENSE-2.0
+// 
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+// ------------------------------------------------------------------------
+
+
+//! \addtogroup op_sum
+//! @{
+
+
+
+template<typename T1>
+inline
+void
+op_sum::apply(Mat<typename T1::elem_type>& out, const Op<T1,op_sum>& in)
+  {
+  arma_extra_debug_sigprint();
+  
+  typedef typename T1::elem_type eT;
+  
+  const uword dim = in.aux_uword_a;
+  arma_debug_check( (dim > 1), "sum(): parameter 'dim' must be 0 or 1" );
+  
+  const Proxy<T1> P(in.m);
+  
+  if(P.is_alias(out) == false)
+    {
+    op_sum::apply_noalias(out, P, dim);
+    }
+  else
+    {
+    Mat<eT> tmp;
+    
+    op_sum::apply_noalias(tmp, P, dim);
+    
+    out.steal_mem(tmp);
+    }
+  }
+
+
+
+template<typename T1>
+inline
+void
+op_sum::apply_noalias(Mat<typename T1::elem_type>& out, const Proxy<T1>& P, const uword dim)
+  {
+  arma_extra_debug_sigprint();
+  
+  if(is_Mat<typename Proxy<T1>::stored_type>::value || (arma_config::openmp && Proxy<T1>::use_mp))
+    {
+    op_sum::apply_noalias_unwrap(out, P, dim);
+    }
+  else
+    {
+    op_sum::apply_noalias_proxy(out, P, dim);
+    }
+  }
+
+
+
+template<typename T1>
+inline
+void
+op_sum::apply_noalias_unwrap(Mat<typename T1::elem_type>& out, const Proxy<T1>& P, const uword dim)
+  {
+  arma_extra_debug_sigprint();
+  
+  typedef typename T1::elem_type eT;
+  
+  typedef typename Proxy<T1>::stored_type P_stored_type;
+  
+  const unwrap<P_stored_type> tmp(P.Q);
+  
+  const typename unwrap<P_stored_type>::stored_type& X = tmp.M;
+  
+  const uword X_n_rows = X.n_rows;
+  const uword X_n_cols = X.n_cols;
+  
+  const uword out_n_rows = (dim == 0) ? uword(1) : X_n_rows;
+  const uword out_n_cols = (dim == 0) ? X_n_cols : uword(1);
+  
+  out.set_size(out_n_rows, out_n_cols);
+  
+  if(X.n_elem == 0)  { out.zeros(); return; }
+  
+  const eT* X_colptr =   X.memptr();
+        eT* out_mem  = out.memptr();
+  
+  if(dim == 0)
+    {
+    for(uword col=0; col < X_n_cols; ++col)
+      {
+      out_mem[col] = arrayops::accumulate( X_colptr, X_n_rows );
+      
+      X_colptr += X_n_rows;
+      }
+    }
+  else
+    {
+    arrayops::copy(out_mem, X_colptr, X_n_rows);
+    
+    X_colptr += X_n_rows;
+    
+    for(uword col=1; col < X_n_cols; ++col)
+      {
+      arrayops::inplace_plus( out_mem, X_colptr, X_n_rows );
+      
+      X_colptr += X_n_rows;
+      }
+    }
+  }
+
+
+
+template<typename T1>
+inline
+void
+op_sum::apply_noalias_proxy(Mat<typename T1::elem_type>& out, const Proxy<T1>& P, const uword dim)
+  {
+  arma_extra_debug_sigprint();
+  
+  typedef typename T1::elem_type eT;
+  
+  const uword P_n_rows = P.get_n_rows();
+  const uword P_n_cols = P.get_n_cols();
+  
+  const uword out_n_rows = (dim == 0) ? uword(1) : P_n_rows;
+  const uword out_n_cols = (dim == 0) ? P_n_cols : uword(1);
+  
+  out.set_size(out_n_rows, out_n_cols);
+  
+  if(P.get_n_elem() == 0)  { out.zeros(); return; }
+  
+  eT* out_mem = out.memptr();
+  
+  if(Proxy<T1>::use_at == false)
+    {
+    if(dim == 0)
+      {
+      uword count = 0;
+      
+      for(uword col=0; col < P_n_cols; ++col)
+        {
+        eT val1 = eT(0);
+        eT val2 = eT(0);
+        
+        uword j;
+        for(j=1; j < P_n_rows; j+=2)
+          {
+          val1 += P[count]; ++count;
+          val2 += P[count]; ++count;
+          }
+        
+        if((j-1) < P_n_rows)
+          {
+          val1 += P[count]; ++count;
+          }
+        
+        out_mem[col] = (val1 + val2);
+        }
+      }
+    else
+      {
+      uword count = 0;
+      
+      for(uword row=0; row < P_n_rows; ++row)
+        {
+        out_mem[row] = P[count]; ++count;
+        }
+      
+      for(uword col=1; col < P_n_cols; ++col)
+      for(uword row=0; row < P_n_rows; ++row)
+        {
+        out_mem[row] += P[count]; ++count;
+        }
+      }
+    }
+  else
+    {
+    if(dim == 0)
+      {
+      for(uword col=0; col < P_n_cols; ++col)
+        {
+        eT val1 = eT(0);
+        eT val2 = eT(0);
+        
+        uword i,j;
+        for(i=0, j=1; j < P_n_rows; i+=2, j+=2)
+          {
+          val1 += P.at(i,col);
+          val2 += P.at(j,col);
+          }
+        
+        if(i < P_n_rows)
+          {
+          val1 += P.at(i,col);
+          }
+        
+        out_mem[col] = (val1 + val2);
+        }
+      }
+    else
+      {
+      for(uword row=0; row < P_n_rows; ++row)
+        {
+        out_mem[row] = P.at(row,0);
+        }
+      
+      for(uword col=1; col < P_n_cols; ++col)
+      for(uword row=0; row < P_n_rows; ++row)
+        {
+        out_mem[row] += P.at(row,col);
+        }
+      }
+    }
+  }
+
+
+
+//
+// cubes
+
+
+
+template<typename T1>
+inline
+void
+op_sum::apply(Cube<typename T1::elem_type>& out, const OpCube<T1,op_sum>& in)
+  {
+  arma_extra_debug_sigprint();
+  
+  typedef typename T1::elem_type eT;
+  
+  const uword dim = in.aux_uword_a;
+  arma_debug_check( (dim > 2), "sum(): parameter 'dim' must be 0 or 1 or 2" );
+  
+  const ProxyCube<T1> P(in.m);
+  
+  if(P.is_alias(out) == false)
+    {
+    op_sum::apply_noalias(out, P, dim);
+    }
+  else
+    {
+    Cube<eT> tmp;
+    
+    op_sum::apply_noalias(tmp, P, dim);
+    
+    out.steal_mem(tmp);
+    }
+  }
+
+
+
+template<typename T1>
+inline
+void
+op_sum::apply_noalias(Cube<typename T1::elem_type>& out, const ProxyCube<T1>& P, const uword dim)
+  {
+  arma_extra_debug_sigprint();
+  
+  if(is_Cube<typename ProxyCube<T1>::stored_type>::value || (arma_config::openmp && ProxyCube<T1>::use_mp))
+    {
+    op_sum::apply_noalias_unwrap(out, P, dim);
+    }
+  else
+    {
+    op_sum::apply_noalias_proxy(out, P, dim);
+    }
+  }
+
+
+
+template<typename T1>
+inline
+void
+op_sum::apply_noalias_unwrap(Cube<typename T1::elem_type>& out, const ProxyCube<T1>& P, const uword dim)
+  {
+  arma_extra_debug_sigprint();
+  
+  typedef typename T1::elem_type eT;
+  
+  typedef typename ProxyCube<T1>::stored_type P_stored_type;
+  
+  const unwrap_cube<P_stored_type> tmp(P.Q);
+  
+  const Cube<eT>& X = tmp.M;
+  
+  const uword X_n_rows   = X.n_rows;
+  const uword X_n_cols   = X.n_cols;
+  const uword X_n_slices = X.n_slices;
+  
+  if(dim == 0)
+    {
+    out.set_size(1, X_n_cols, X_n_slices);
+    
+    for(uword slice=0; slice < X_n_slices; ++slice)
+      {
+      eT* out_mem = out.slice_memptr(slice);
+      
+      for(uword col=0; col < X_n_cols; ++col)
+        {
+        out_mem[col] = arrayops::accumulate( X.slice_colptr(slice,col), X_n_rows );
+        }
+      }
+    }
+  else
+  if(dim == 1)
+    {
+    out.zeros(X_n_rows, 1, X_n_slices);
+    
+    for(uword slice=0; slice < X_n_slices; ++slice)
+      {
+      eT* out_mem = out.slice_memptr(slice);
+      
+      for(uword col=0; col < X_n_cols; ++col)
+        {
+        arrayops::inplace_plus( out_mem, X.slice_colptr(slice,col), X_n_rows );
+        }
+      }
+    }
+  else
+  if(dim == 2)
+    {
+    out.zeros(X_n_rows, X_n_cols, 1);
+    
+    eT* out_mem = out.memptr();
+    
+    for(uword slice=0; slice < X_n_slices; ++slice)
+      {
+      arrayops::inplace_plus(out_mem, X.slice_memptr(slice), X.n_elem_slice );
+      }
+    }
+  }
+
+
+
+template<typename T1>
+inline
+void
+op_sum::apply_noalias_proxy(Cube<typename T1::elem_type>& out, const ProxyCube<T1>& P, const uword dim)
+  {
+  arma_extra_debug_sigprint();
+  
+  typedef typename T1::elem_type eT;
+  
+  const uword P_n_rows   = P.get_n_rows();
+  const uword P_n_cols   = P.get_n_cols();
+  const uword P_n_slices = P.get_n_slices();
+  
+  if(dim == 0)
+    {
+    out.set_size(1, P_n_cols, P_n_slices);
+    
+    for(uword slice=0; slice < P_n_slices; ++slice)
+      {
+      eT* out_mem = out.slice_memptr(slice);
+      
+      for(uword col=0; col < P_n_cols; ++col)
+        {
+        eT val1 = eT(0);
+        eT val2 = eT(0);
+        
+        uword i,j;
+        for(i=0, j=1; j < P_n_rows; i+=2, j+=2)
+          {
+          val1 += P.at(i,col,slice);
+          val2 += P.at(j,col,slice);
+          }
+        
+        if(i < P_n_rows)
+          {
+          val1 += P.at(i,col,slice);
+          }
+        
+        out_mem[col] = (val1 + val2);
+        }
+      }
+    }
+  else
+  if(dim == 1)
+    {
+    out.zeros(P_n_rows, 1, P_n_slices);
+    
+    for(uword slice=0; slice < P_n_slices; ++slice)
+      {
+      eT* out_mem = out.slice_memptr(slice);
+      
+      for(uword col=0; col < P_n_cols; ++col)
+      for(uword row=0; row < P_n_rows; ++row)
+        {
+        out_mem[row] += P.at(row,col,slice);
+        }
+      }
+    }
+  else
+  if(dim == 2)
+    {
+    out.zeros(P_n_rows, P_n_cols, 1);
+    
+    for(uword slice=0; slice < P_n_slices; ++slice)
+      {
+      for(uword col=0; col < P_n_cols; ++col)
+        {
+        eT* out_mem = out.slice_colptr(0,col);
+        
+        for(uword row=0; row < P_n_rows; ++row)
+          {
+          out_mem[row] += P.at(row,col,slice);
+          }
+        }
+      }
+    }
+  }
+
+
+
+//! @}