From eda5bc26f44ee9a6f83dcf8c91f17296d7fc509d Mon Sep 17 00:00:00 2001
From: Nao Pross <np@0hm.ch>
Date: Mon, 12 Feb 2024 14:52:43 +0100
Subject: Move into version control

---
 .../include/armadillo_bits/op_flip_meat.hpp        | 341 +++++++++++++++++++++
 1 file changed, 341 insertions(+)
 create mode 100644 src/armadillo/include/armadillo_bits/op_flip_meat.hpp

(limited to 'src/armadillo/include/armadillo_bits/op_flip_meat.hpp')

diff --git a/src/armadillo/include/armadillo_bits/op_flip_meat.hpp b/src/armadillo/include/armadillo_bits/op_flip_meat.hpp
new file mode 100644
index 0000000..470ae92
--- /dev/null
+++ b/src/armadillo/include/armadillo_bits/op_flip_meat.hpp
@@ -0,0 +1,341 @@
+// 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_flip
+//! @{
+
+
+
+template<typename T1>
+inline
+void
+op_flipud::apply(Mat<typename T1::elem_type>& out, const Op<T1,op_flipud>& in)
+  {
+  arma_extra_debug_sigprint();
+  
+  typedef typename T1::elem_type eT;
+  
+  if(is_Mat<T1>::value)
+    {
+    // allow detection of in-place operation
+    
+    const unwrap<T1> U(in.m);
+    
+    op_flipud::apply_direct(out, U.M);
+    }
+  else
+    {
+    const Proxy<T1> P(in.m);
+    
+    if(P.is_alias(out))
+      {
+      Mat<eT> tmp;
+      
+      op_flipud::apply_proxy_noalias(tmp, P);
+      
+      out.steal_mem(tmp);
+      }
+    else
+      {
+      op_flipud::apply_proxy_noalias(out, P);
+      }
+    }
+  }
+
+
+
+template<typename eT>
+inline
+void
+op_flipud::apply_direct(Mat<eT>& out, const Mat<eT>& X)
+  {
+  arma_extra_debug_sigprint();
+  
+  const uword X_n_rows = X.n_rows;
+  const uword X_n_cols = X.n_cols;
+  
+  const uword X_n_rows_m1 = X_n_rows - 1;
+  
+  if(&out != &X)
+    {
+    out.set_size(X_n_rows, X_n_cols);
+    
+    if(X_n_cols == 1)
+      {
+      const eT*   X_mem =   X.memptr();
+            eT* out_mem = out.memptr();
+      
+      for(uword row=0; row < X_n_rows; ++row)
+        {
+        out_mem[X_n_rows_m1 - row] = X_mem[row];
+        }
+      }
+    else
+      {
+      for(uword col=0; col < X_n_cols; ++col)
+        {
+        const eT*   X_colmem =   X.colptr(col);
+              eT* out_colmem = out.colptr(col);
+        
+        for(uword row=0; row < X_n_rows; ++row)
+          {
+          out_colmem[X_n_rows_m1 - row] = X_colmem[row];
+          }
+        }
+      }
+    }
+  else  // in-place operation
+    {
+    const uword N = X_n_rows / 2;
+    
+    if(X_n_cols == 1)
+      {
+      eT* out_mem = out.memptr();
+      
+      for(uword row=0; row < N; ++row)
+        {
+        std::swap(out_mem[X_n_rows_m1 - row], out_mem[row]);
+        }
+      }
+    else
+      {
+      for(uword col=0; col < X_n_cols; ++col)
+        {
+        eT* out_colmem = out.colptr(col);
+        
+        for(uword row=0; row < N; ++row)
+          {
+          std::swap(out_colmem[X_n_rows_m1 - row], out_colmem[row]);
+          }
+        }
+      }
+    }
+  }
+
+
+
+template<typename T1>
+inline
+void
+op_flipud::apply_proxy_noalias(Mat<typename T1::elem_type>& out, const Proxy<T1>& P)
+  {
+  arma_extra_debug_sigprint();
+  
+  typedef typename T1::elem_type eT;
+  
+  typedef typename Proxy<T1>::stored_type P_stored_type;
+  
+  if(is_Mat<P_stored_type>::value)
+    {
+    const unwrap<P_stored_type> U(P.Q);
+    
+    op_flipud::apply_direct(out, U.M);
+    
+    return;
+    }
+  
+  const uword P_n_rows = P.get_n_rows();
+  const uword P_n_cols = P.get_n_cols();
+  
+  const uword P_n_rows_m1 = P_n_rows - 1;
+  
+  out.set_size(P_n_rows, P_n_cols);
+  
+  if( ((T1::is_col) || (P_n_cols == 1)) && (Proxy<T1>::use_at == false) )
+    {
+    eT* out_mem = out.memptr();
+    
+    const typename Proxy<T1>::ea_type P_ea = P.get_ea();
+    
+    for(uword row=0; row < P_n_rows; ++row)
+      {
+      out_mem[P_n_rows_m1 - row] = P_ea[row];
+      }
+    }
+  else
+    {
+    for(uword col=0; col < P_n_cols; ++col)
+      {
+      eT* out_colmem = out.colptr(col);
+      
+      for(uword row=0; row < P_n_rows; ++row)
+        {
+        out_colmem[P_n_rows_m1 - row] = P.at(row, col);
+        }
+      }
+    }
+  }
+
+
+
+//
+
+
+
+template<typename T1>
+inline
+void
+op_fliplr::apply(Mat<typename T1::elem_type>& out, const Op<T1,op_fliplr>& in)
+  {
+  arma_extra_debug_sigprint();
+  
+  typedef typename T1::elem_type eT;
+  
+  if(is_Mat<T1>::value)
+    {
+    // allow detection of in-place operation
+    
+    const unwrap<T1> U(in.m);
+    
+    op_fliplr::apply_direct(out, U.M);
+    }
+  else
+    {
+    const Proxy<T1> P(in.m);
+    
+    if(P.is_alias(out))
+      {
+      Mat<eT> tmp;
+      
+      op_fliplr::apply_proxy_noalias(tmp, P);
+      
+      out.steal_mem(tmp);
+      }
+    else
+      {
+      op_fliplr::apply_proxy_noalias(out, P);
+      }
+    }
+  }
+
+
+
+template<typename eT>
+inline
+void
+op_fliplr::apply_direct(Mat<eT>& out, const Mat<eT>& X)
+  {
+  arma_extra_debug_sigprint();
+  
+  const uword X_n_rows = X.n_rows;
+  const uword X_n_cols = X.n_cols;
+  
+  const uword X_n_cols_m1 = X_n_cols - 1;
+  
+  if(&out != &X)
+    {
+    out.set_size(X_n_rows, X_n_cols);
+    
+    if(X_n_rows == 1)
+      {
+      const eT*   X_mem =   X.memptr();
+            eT* out_mem = out.memptr();
+      
+      for(uword col=0; col < X_n_cols; ++col)
+        {
+        out_mem[X_n_cols_m1 - col] = X_mem[col];
+        }
+      }
+    else
+      {
+      for(uword col=0; col < X_n_cols; ++col)
+        {
+        out.col(X_n_cols_m1 - col) = X.col(col);
+        }
+      }
+    }
+  else  // in-place operation
+    {
+    const uword N = X_n_cols / 2;
+    
+    if(X_n_rows == 1)
+      {
+      eT* out_mem = out.memptr();
+      
+      for(uword col=0; col < N; ++col)
+        {
+        std::swap(out_mem[X_n_cols_m1 - col], out_mem[col]);
+        }
+      }
+    else
+      {
+      for(uword col=0; col < N; ++col)
+        {
+        out.swap_cols(X_n_cols_m1 - col, col);
+        }
+      }
+    }
+  }
+
+
+
+template<typename T1>
+inline
+void
+op_fliplr::apply_proxy_noalias(Mat<typename T1::elem_type>& out, const Proxy<T1>& P)
+  {
+  arma_extra_debug_sigprint();
+  
+  typedef typename T1::elem_type eT;
+  
+  typedef typename Proxy<T1>::stored_type P_stored_type;
+  
+  if(is_Mat<P_stored_type>::value)
+    {
+    const unwrap<P_stored_type> U(P.Q);
+    
+    op_fliplr::apply_direct(out, U.M);
+    
+    return;
+    }
+  
+  const uword P_n_rows = P.get_n_rows();
+  const uword P_n_cols = P.get_n_cols();
+  
+  const uword P_n_cols_m1 = P_n_cols - 1;
+  
+  out.set_size(P_n_rows, P_n_cols);
+  
+  if( ((T1::is_row) || (P_n_rows == 1)) && (Proxy<T1>::use_at == false) )
+    {
+    eT* out_mem = out.memptr();
+    
+    const typename Proxy<T1>::ea_type P_ea = P.get_ea();
+    
+    for(uword col=0; col < P_n_cols; ++col)
+      {
+      out_mem[P_n_cols_m1 - col] = P_ea[col];
+      }
+    }
+  else
+    {
+    for(uword col=0; col < P_n_cols; ++col)
+      {
+      eT* out_colmem = out.colptr(P_n_cols_m1 - col);
+      
+      for(uword row=0; row < P_n_rows; ++row)
+        {
+        out_colmem[row] = P.at(row,col);
+        }
+      }
+    }
+  }
+
+
+
+//! @}
-- 
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