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_cumsum_meat.hpp      | 174 +++++++++++++++++++++
 1 file changed, 174 insertions(+)
 create mode 100644 src/armadillo/include/armadillo_bits/op_cumsum_meat.hpp

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

diff --git a/src/armadillo/include/armadillo_bits/op_cumsum_meat.hpp b/src/armadillo/include/armadillo_bits/op_cumsum_meat.hpp
new file mode 100644
index 0000000..d46eda2
--- /dev/null
+++ b/src/armadillo/include/armadillo_bits/op_cumsum_meat.hpp
@@ -0,0 +1,174 @@
+// 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_cumsum
+//! @{
+
+
+
+template<typename eT>
+inline
+void
+op_cumsum::apply_noalias(Mat<eT>& out, const Mat<eT>& X, const uword dim)
+  {
+  arma_extra_debug_sigprint();
+  
+  uword n_rows = X.n_rows;
+  uword n_cols = X.n_cols;
+  
+  out.set_size(n_rows,n_cols);
+  
+  if(out.n_elem == 0)  { return; }
+  
+  if(dim == 0)
+    {
+    if(n_cols == 1)
+      {
+      const eT*   X_mem =   X.memptr();
+            eT* out_mem = out.memptr();
+      
+      eT acc = eT(0);
+      
+      for(uword row=0; row < n_rows; ++row)
+        {
+        acc += X_mem[row];
+        
+        out_mem[row] = acc;
+        }
+      }
+    else
+      {
+      for(uword col=0; col < n_cols; ++col)
+        {
+        const eT*   X_colmem =   X.colptr(col);
+              eT* out_colmem = out.colptr(col);
+        
+        eT acc = eT(0);
+        
+        for(uword row=0; row < n_rows; ++row)
+          {
+          acc += X_colmem[row];
+          
+          out_colmem[row] = acc;
+          }
+        }
+      }
+    }
+  else
+  if(dim == 1)
+    {
+    if(n_rows == 1)
+      {
+      const eT*   X_mem =   X.memptr();
+            eT* out_mem = out.memptr();
+      
+      eT acc = eT(0);
+      
+      for(uword col=0; col < n_cols; ++col)
+        {
+        acc += X_mem[col];
+        
+        out_mem[col] = acc;
+        }
+      }
+    else
+      {
+      if(n_cols > 0)
+        {
+        arrayops::copy( out.colptr(0), X.colptr(0), n_rows );
+        
+        for(uword col=1; col < n_cols; ++col)
+          {
+          const eT* out_colmem_prev = out.colptr(col-1);
+                eT* out_colmem      = out.colptr(col  );
+          const eT*   X_colmem      =   X.colptr(col  );
+          
+          for(uword row=0; row < n_rows; ++row)
+            {
+            out_colmem[row] = out_colmem_prev[row] + X_colmem[row];
+            }
+          }
+        }
+      }
+    }
+  }
+
+
+
+template<typename T1>
+inline
+void
+op_cumsum::apply(Mat<typename T1::elem_type>& out, const Op<T1,op_cumsum>& in)
+  {
+  arma_extra_debug_sigprint();
+  
+  typedef typename T1::elem_type eT;
+  
+  const uword dim = in.aux_uword_a;
+  
+  arma_debug_check( (dim > 1), "cumsum(): parameter 'dim' must be 0 or 1" );
+  
+  const quasi_unwrap<T1> U(in.m);
+  
+  if(U.is_alias(out))
+    {
+    Mat<eT> tmp;
+    
+    op_cumsum::apply_noalias(tmp, U.M, dim);
+    
+    out.steal_mem(tmp);
+    }
+  else
+    {
+    op_cumsum::apply_noalias(out, U.M, dim);
+    }
+  }
+
+
+
+template<typename T1>
+inline
+void
+op_cumsum_vec::apply(Mat<typename T1::elem_type>& out, const Op<T1,op_cumsum_vec>& in)
+  {
+  arma_extra_debug_sigprint();
+  
+  typedef typename T1::elem_type eT;
+  
+  const quasi_unwrap<T1> U(in.m);
+  
+  const uword dim = (T1::is_xvec) ? uword(U.M.is_rowvec() ? 1 : 0) : uword((T1::is_row) ? 1 : 0);
+  
+  if(U.is_alias(out))
+    {
+    Mat<eT> tmp;
+    
+    op_cumsum::apply_noalias(tmp, U.M, dim);
+    
+    out.steal_mem(tmp);
+    }
+  else
+    {
+    op_cumsum::apply_noalias(out, U.M, dim);
+    }
+  }
+
+
+
+//! @}
+
-- 
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