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/glue_histc_meat.hpp     | 167 +++++++++++++++++++++
 1 file changed, 167 insertions(+)
 create mode 100644 src/armadillo/include/armadillo_bits/glue_histc_meat.hpp

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

diff --git a/src/armadillo/include/armadillo_bits/glue_histc_meat.hpp b/src/armadillo/include/armadillo_bits/glue_histc_meat.hpp
new file mode 100644
index 0000000..6e79175
--- /dev/null
+++ b/src/armadillo/include/armadillo_bits/glue_histc_meat.hpp
@@ -0,0 +1,167 @@
+// 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 glue_histc
+//! @{
+
+
+template<typename eT>
+inline
+void
+glue_histc::apply_noalias(Mat<uword>& C, const Mat<eT>& A, const Mat<eT>& B, const uword dim)
+  {
+  arma_extra_debug_sigprint();
+  
+  arma_debug_check( ((B.is_vec() == false) && (B.is_empty() == false)), "histc(): parameter 'edges' must be a vector" );
+  
+  const uword A_n_rows = A.n_rows;
+  const uword A_n_cols = A.n_cols;
+  
+  const uword B_n_elem = B.n_elem;
+  
+  if( B_n_elem == uword(0) )  { C.reset(); return; }
+  
+  arma_debug_check
+    (
+    ((Col<eT>(const_cast<eT*>(B.memptr()), B_n_elem, false, false)).is_sorted("strictascend") == false),
+    "hist(): given 'edges' vector does not contain monotonically increasing values"
+    );
+  
+  const eT*   B_mem       = B.memptr();
+  const uword B_n_elem_m1 = B_n_elem - 1;
+  
+  if(dim == uword(0))
+    {
+    C.zeros(B_n_elem, A_n_cols);
+    
+    for(uword col=0; col < A_n_cols; ++col)
+      {
+      const eT*    A_coldata = A.colptr(col);
+            uword* C_coldata = C.colptr(col);
+      
+      for(uword row=0; row < A_n_rows; ++row)
+        {
+        const eT x = A_coldata[row];
+        
+        for(uword i=0; i < B_n_elem_m1; ++i)
+          {
+               if( (B_mem[i]           <= x) && (x < B_mem[i+1]) )  { C_coldata[i]++;           break; }
+          else if(  B_mem[B_n_elem_m1] == x                      )  { C_coldata[B_n_elem_m1]++; break; }    // for compatibility with Matlab
+          }
+        }
+      }
+    }
+  else
+  if(dim == uword(1))
+    {
+    C.zeros(A_n_rows, B_n_elem);
+    
+    if(A.n_rows == 1)
+      {
+      const uword  A_n_elem = A.n_elem;
+      const eT*    A_mem    = A.memptr();
+            uword* C_mem    = C.memptr();
+      
+      for(uword j=0; j < A_n_elem; ++j)
+        {
+        const eT x = A_mem[j];
+        
+        for(uword i=0; i < B_n_elem_m1; ++i)
+          {
+               if( (B_mem[i]           <= x) && (x < B_mem[i+1]) )  { C_mem[i]++;           break; }
+          else if(  B_mem[B_n_elem_m1] == x                      )  { C_mem[B_n_elem_m1]++; break; }    // for compatibility with Matlab
+          }
+        }
+      }
+    else
+      {
+      for(uword row=0; row < A_n_rows; ++row)
+      for(uword col=0; col < A_n_cols; ++col)
+        {
+        const eT x = A.at(row,col);
+        
+        for(uword i=0; i < B_n_elem_m1; ++i)
+          {
+               if( (B_mem[i]            <= x) && (x < B_mem[i+1]) )  { C.at(row,i)++;           break; }
+          else if(  B_mem[B_n_elem_m1]  == x                      )  { C.at(row,B_n_elem_m1)++; break; }   // for compatibility with Matlab
+          }
+        }
+      }
+    }
+  }
+
+
+
+template<typename T1, typename T2>
+inline
+void
+glue_histc::apply(Mat<uword>& C, const mtGlue<uword,T1,T2,glue_histc>& expr)
+  {
+  arma_extra_debug_sigprint();
+  
+  const uword dim = expr.aux_uword;
+  
+  arma_debug_check( (dim > 1), "histc(): parameter 'dim' must be 0 or 1" );
+  
+  const quasi_unwrap<T1> UA(expr.A);
+  const quasi_unwrap<T2> UB(expr.B);
+  
+  if(UA.is_alias(C) || UB.is_alias(C))
+    {
+    Mat<uword> tmp;
+    
+    glue_histc::apply_noalias(tmp, UA.M, UB.M, dim);
+    
+    C.steal_mem(tmp);
+    }
+  else
+    {
+    glue_histc::apply_noalias(C, UA.M, UB.M, dim);
+    }
+  }
+
+
+
+template<typename T1, typename T2>
+inline
+void
+glue_histc_default::apply(Mat<uword>& C, const mtGlue<uword,T1,T2,glue_histc_default>& expr)
+  {
+  arma_extra_debug_sigprint();
+  
+  const quasi_unwrap<T1> UA(expr.A);
+  const quasi_unwrap<T2> UB(expr.B);
+  
+  const uword dim = (T1::is_xvec) ? uword(UA.M.is_rowvec() ? 1 : 0) : uword((T1::is_row) ? 1 : 0);
+  
+  if(UA.is_alias(C) || UB.is_alias(C))
+    {
+    Mat<uword> tmp;
+    
+    glue_histc::apply_noalias(tmp, UA.M, UB.M, dim);
+    
+    C.steal_mem(tmp);
+    }
+  else
+    {
+    glue_histc::apply_noalias(C, UA.M, UB.M, dim);
+    }
+  }
+
+
+//! @}
-- 
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