comparison armadillo-2.4.4/include/armadillo_bits/op_resize_meat.hpp @ 0:8b6102e2a9b0

Armadillo Library

+// Copyright (C) 2011 NICTA (www.nicta.com.au)
+// Copyright (C) 2011 Conrad Sanderson
+// 
+// This file is part of the Armadillo C++ library.
+// It is provided without any warranty of fitness
+// for any purpose. You can redistribute this file
+// and/or modify it under the terms of the GNU
+// Lesser General Public License (LGPL) as published
+// by the Free Software Foundation, either version 3
+// of the License or (at your option) any later version.
+// (see http://www.opensource.org/licenses for more info)
+
+
+
+//! \addtogroup op_resize
+//! @{
+
+
+
+template<typename T1>
+inline
+void
+op_resize::apply(Mat<typename T1::elem_type>& actual_out, const Op<T1,op_resize>& in)
+  {
+  arma_extra_debug_sigprint();
+  
+  typedef typename T1::elem_type eT;
+  
+  const uword out_n_rows = in.aux_uword_a;
+  const uword out_n_cols = in.aux_uword_b;
+  
+  const unwrap<T1>   tmp(in.m);
+  const Mat<eT>& A = tmp.M;
+  
+  const uword A_n_rows = A.n_rows;
+  const uword A_n_cols = A.n_cols;
+  
+  Mat<eT> B;
+  
+  const bool alias = (&actual_out == &A);
+  
+  Mat<eT>& out = alias ? B : actual_out;
+  
+  out.set_size(out_n_rows, out_n_cols);
+  
+  if( (out_n_rows > A_n_rows) || (out_n_cols > A_n_cols) )
+    {
+    out.zeros();
+    }
+  
+  if( (out.n_elem > 0) && (A.n_elem > 0) )
+    {
+    const uword end_row = (std::min)(out_n_rows, A_n_rows) - 1;
+    const uword end_col = (std::min)(out_n_cols, A_n_cols) - 1;
+    
+    out.submat(0, 0, end_row, end_col) = A.submat(0, 0, end_row, end_col);
+    }
+  
+  if(alias)
+    {
+    actual_out.steal_mem(B);
+    }
+  
+  }
+
+
+
+template<typename T1>
+inline
+void
+op_resize::apply(Cube<typename T1::elem_type>& actual_out, const OpCube<T1,op_resize>& in)
+  {
+  arma_extra_debug_sigprint();
+  
+  typedef typename T1::elem_type eT;
+  
+  const uword out_n_rows   = in.aux_uword_a;
+  const uword out_n_cols   = in.aux_uword_b;
+  const uword out_n_slices = in.aux_uword_c;
+  
+  const unwrap_cube<T1> tmp(in.m);
+  const Cube<eT>& A   = tmp.M;
+  
+  const uword A_n_rows   = A.n_rows;
+  const uword A_n_cols   = A.n_cols;
+  const uword A_n_slices = A.n_slices;
+  
+  Cube<eT> B;
+  
+  const bool alias = (&actual_out == &A);
+  
+  Cube<eT>& out = alias ? B : actual_out;
+  
+  out.set_size(out_n_rows, out_n_cols, out_n_slices);
+  
+  if( (out_n_rows > A_n_rows) || (out_n_cols > A_n_cols) || (out_n_slices > A_n_slices) )
+    {
+    out.zeros();
+    }
+  
+  if( (out.n_elem > 0) && (A.n_elem > 0) )
+    {
+    const uword end_row   = (std::min)(out_n_rows,   A_n_rows)   - 1;
+    const uword end_col   = (std::min)(out_n_cols,   A_n_cols)   - 1;
+    const uword end_slice = (std::min)(out_n_slices, A_n_slices) - 1;
+    
+    out.subcube(0, 0, 0, end_row, end_col, end_slice) = A.subcube(0, 0, 0, end_row, end_col, end_slice);
+    }
+  
+  if(alias)
+    {
+    actual_out.steal_mem(B);
+    }
+  
+  }
+
+
+
+//! @}