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/spop_reverse_meat.hpp   | 185 +++++++++++++++++++++
 1 file changed, 185 insertions(+)
 create mode 100644 src/armadillo/include/armadillo_bits/spop_reverse_meat.hpp

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

diff --git a/src/armadillo/include/armadillo_bits/spop_reverse_meat.hpp b/src/armadillo/include/armadillo_bits/spop_reverse_meat.hpp
new file mode 100644
index 0000000..2ba6e45
--- /dev/null
+++ b/src/armadillo/include/armadillo_bits/spop_reverse_meat.hpp
@@ -0,0 +1,185 @@
+// 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 spop_reverse
+//! @{
+
+
+
+template<typename eT>
+inline
+void
+spop_reverse::apply_spmat(SpMat<eT>& out, const SpMat<eT>& X, const uword dim)
+  {
+  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;
+  const uword X_n_cols_m1 = X_n_cols - 1;
+  
+  const uword N = X.n_nonzero;
+  
+  if(N == uword(0))
+    {
+    out.zeros(X_n_rows, X_n_cols);
+    return;
+    }
+  
+  umat locs(2, N, arma_nozeros_indicator());
+  
+  uword* locs_mem = locs.memptr();
+  
+  typename SpMat<eT>::const_iterator it = X.begin();
+  
+  if(dim == 0)
+    {
+    for(uword i=0; i < N; ++i)
+      {
+      const uword row = it.row();
+      const uword col = it.col();
+      
+      (*locs_mem) = X_n_rows_m1 - row;  locs_mem++;
+      (*locs_mem) =               col;  locs_mem++;
+      
+      ++it;
+      }
+    }
+  else
+  if(dim == 1)
+    {
+    for(uword i=0; i < N; ++i)
+      {
+      const uword row = it.row();
+      const uword col = it.col();
+      
+      (*locs_mem) =               row;  locs_mem++;
+      (*locs_mem) = X_n_cols_m1 - col;  locs_mem++;
+      
+      ++it;
+      }
+    }
+  
+  const Col<eT> vals(const_cast<eT*>(X.values), N, false);
+  
+  SpMat<eT> tmp(locs, vals, X_n_rows, X_n_cols, true, false);
+  
+  out.steal_mem(tmp);
+  }
+
+
+
+template<typename T1>
+inline
+void
+spop_reverse::apply_proxy(SpMat<typename T1::elem_type>& out, const T1& X, const uword dim)
+  {
+  arma_extra_debug_sigprint();
+  
+  typedef typename T1::elem_type eT;
+  
+  const SpProxy<T1> P(X);
+  
+  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;
+  const uword P_n_cols_m1 = P_n_cols - 1;
+  
+  const uword N = P.get_n_nonzero();
+  
+  if(N == uword(0))
+    {
+    out.zeros(P_n_rows, P_n_cols);
+    return;
+    }
+  
+  umat    locs(2, N, arma_nozeros_indicator());
+  Col<eT> vals(   N, arma_nozeros_indicator());
+  
+  uword* locs_mem = locs.memptr();
+  eT*    vals_mem = vals.memptr();
+  
+  typename SpProxy<T1>::const_iterator_type it = P.begin();
+  
+  if(dim == 0)
+    {
+    for(uword i=0; i < N; ++i)
+      {
+      const uword row = it.row();
+      const uword col = it.col();
+      
+      (*locs_mem) = P_n_rows_m1 - row;  locs_mem++;
+      (*locs_mem) =               col;  locs_mem++;
+      
+      (*vals_mem) = (*it);  vals_mem++;
+      
+      ++it;
+      }
+    }
+  else
+  if(dim == 1)
+    {
+    for(uword i=0; i < N; ++i)
+      {
+      const uword row = it.row();
+      const uword col = it.col();
+      
+      (*locs_mem) =               row;  locs_mem++;
+      (*locs_mem) = P_n_cols_m1 - col;  locs_mem++;
+      
+      (*vals_mem) = (*it);  vals_mem++;
+      
+      ++it;
+      }
+    }
+  
+  SpMat<eT> tmp(locs, vals, P_n_rows, P_n_cols, true, false);
+  
+  out.steal_mem(tmp);
+  }
+
+
+
+template<typename T1>
+inline
+void
+spop_reverse::apply(SpMat<typename T1::elem_type>& out, const SpOp<T1,spop_reverse>& in)
+  {
+  arma_extra_debug_sigprint();
+  
+  const uword dim = in.aux_uword_a;
+  
+  arma_debug_check( (dim > 1), "reverse(): parameter 'dim' must be 0 or 1" );
+  
+  if(is_SpMat<T1>::value)
+    {
+    const unwrap_spmat<T1> tmp(in.m);
+    
+    spop_reverse::apply_spmat(out, tmp.M, dim);
+    }
+  else
+    {
+    spop_reverse::apply_proxy(out, in.m, dim);
+    }
+  }
+
+
+
+//! @}
-- 
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