max@0: // Copyright (C) 2008-2011 NICTA (www.nicta.com.au)
max@0: // Copyright (C) 2008-2011 Conrad Sanderson
max@0: // 
max@0: // This file is part of the Armadillo C++ library.
max@0: // It is provided without any warranty of fitness
max@0: // for any purpose. You can redistribute this file
max@0: // and/or modify it under the terms of the GNU
max@0: // Lesser General Public License (LGPL) as published
max@0: // by the Free Software Foundation, either version 3
max@0: // of the License or (at your option) any later version.
max@0: // (see http://www.opensource.org/licenses for more info)
max@0: 
max@0: 
max@0: 
max@0: //! \addtogroup op_reshape
max@0: //! @{
max@0: 
max@0: 
max@0: 
max@0: template<typename T1>
max@0: inline
max@0: void
max@0: op_reshape::apply(Mat<typename T1::elem_type>& out, const Op<T1,op_reshape>& in)
max@0:   {
max@0:   arma_extra_debug_sigprint();
max@0:   
max@0:   typedef typename T1::elem_type eT;
max@0:   
max@0:   const unwrap<T1>   tmp(in.m);
max@0:   const Mat<eT>& A = tmp.M;
max@0:   
max@0:   const uword in_n_rows = in.aux_uword_a;
max@0:   const uword in_n_cols = in.aux_uword_b;
max@0:   const uword in_dim    = in.aux_uword_c;
max@0:   
max@0:   const uword in_n_elem = in_n_rows * in_n_cols;
max@0:   
max@0:   if(A.n_elem == in_n_elem)
max@0:     {
max@0:     if(in_dim == 0)
max@0:       {
max@0:       if(&out != &A)
max@0:         {
max@0:         out.set_size(in_n_rows, in_n_cols);
max@0:         arrayops::copy( out.memptr(), A.memptr(), out.n_elem );
max@0:         }
max@0:       else  // &out == &A, i.e. inplace resize
max@0:         {
max@0:         const bool same_size = ( (out.n_rows == in_n_rows) && (out.n_cols == in_n_cols) );
max@0:         
max@0:         if(same_size == false)
max@0:           {
max@0:           arma_debug_check
max@0:             (
max@0:             (out.mem_state == 3),
max@0:             "reshape(): size can't be changed as template based size specification is in use"
max@0:             );
max@0:           
max@0:           access::rw(out.n_rows) = in_n_rows;
max@0:           access::rw(out.n_cols) = in_n_cols;
max@0:           }
max@0:         }
max@0:       }
max@0:     else
max@0:       {
max@0:       unwrap_check< Mat<eT> > tmp(A, out);
max@0:       const Mat<eT>& B      = tmp.M;
max@0:       
max@0:       out.set_size(in_n_rows, in_n_cols);
max@0:       
max@0:       eT* out_mem = out.memptr();
max@0:       uword i = 0;
max@0:       
max@0:       const uword B_n_rows = B.n_rows;
max@0:       const uword B_n_cols = B.n_cols;
max@0:       
max@0:       for(uword row=0; row<B_n_rows; ++row)
max@0:         {
max@0:         for(uword col=0; col<B_n_cols; ++col)
max@0:           {
max@0:           out_mem[i] = B.at(row,col);
max@0:           ++i;
max@0:           }
max@0:         }
max@0:         
max@0:       }
max@0:     }
max@0:   else
max@0:     {
max@0:     const unwrap_check< Mat<eT> > tmp(A, out);
max@0:     const Mat<eT>& B            = tmp.M;
max@0:     
max@0:     const uword n_elem_to_copy = (std::min)(B.n_elem, in_n_elem);
max@0:     
max@0:     out.set_size(in_n_rows, in_n_cols);
max@0:     
max@0:     eT* out_mem = out.memptr();
max@0:     
max@0:     if(in_dim == 0)
max@0:       {
max@0:       arrayops::copy( out_mem, B.memptr(), n_elem_to_copy );
max@0:       }
max@0:     else
max@0:       {
max@0:       uword row = 0;
max@0:       uword col = 0;
max@0:       
max@0:       const uword B_n_cols = B.n_cols;
max@0:       
max@0:       for(uword i=0; i<n_elem_to_copy; ++i)
max@0:         {
max@0:         out_mem[i] = B.at(row,col);
max@0:         
max@0:         ++col;
max@0:         
max@0:         if(col >= B_n_cols)
max@0:           {
max@0:           col = 0;
max@0:           ++row;
max@0:           }
max@0:         }
max@0:       }
max@0:     
max@0:     for(uword i=n_elem_to_copy; i<in_n_elem; ++i)
max@0:       {
max@0:       out_mem[i] = eT(0);
max@0:       }
max@0:     
max@0:     }
max@0:   }
max@0: 
max@0: 
max@0: 
max@0: template<typename T1>
max@0: inline
max@0: void
max@0: op_reshape::apply(Cube<typename T1::elem_type>& out, const OpCube<T1,op_reshape>& in)
max@0:   {
max@0:   arma_extra_debug_sigprint();
max@0:   
max@0:   typedef typename T1::elem_type eT;
max@0:   
max@0:   const unwrap_cube<T1> tmp(in.m);
max@0:   const Cube<eT>& A   = tmp.M;
max@0:   
max@0:   const uword in_n_rows   = in.aux_uword_a;
max@0:   const uword in_n_cols   = in.aux_uword_b;
max@0:   const uword in_n_slices = in.aux_uword_c;
max@0:   const uword in_dim      = in.aux_uword_d;
max@0:   
max@0:   const uword in_n_elem = in_n_rows * in_n_cols * in_n_slices;
max@0:   
max@0:   if(A.n_elem == in_n_elem)
max@0:     {
max@0:     if(in_dim == 0)
max@0:       {
max@0:       if(&out != &A)
max@0:         {
max@0:         out.set_size(in_n_rows, in_n_cols, in_n_slices);
max@0:         arrayops::copy( out.memptr(), A.memptr(), out.n_elem );
max@0:         }
max@0:       else  // &out == &A, i.e. inplace resize
max@0:         {
max@0:         const bool same_size = ( (out.n_rows == in_n_rows) && (out.n_cols == in_n_cols) && (out.n_slices == in_n_slices) );
max@0:         
max@0:         if(same_size == false)
max@0:           {
max@0:           arma_debug_check
max@0:             (
max@0:             (out.mem_state == 3),
max@0:             "reshape(): size can't be changed as template based size specification is in use"
max@0:             );
max@0:           
max@0:           out.delete_mat();
max@0:           
max@0:           access::rw(out.n_rows)       = in_n_rows;
max@0:           access::rw(out.n_cols)       = in_n_cols;
max@0:           access::rw(out.n_elem_slice) = in_n_rows * in_n_cols;
max@0:           access::rw(out.n_slices)     = in_n_slices;
max@0:           
max@0:           out.create_mat();
max@0:           }
max@0:         }
max@0:       }
max@0:     else
max@0:       {
max@0:       unwrap_cube_check< Cube<eT> > tmp(A, out);
max@0:       const Cube<eT>& B           = tmp.M;
max@0:       
max@0:       out.set_size(in_n_rows, in_n_cols, in_n_slices);
max@0:       
max@0:       eT* out_mem = out.memptr();
max@0:       uword i = 0;
max@0:       
max@0:       const uword B_n_rows   = B.n_rows;
max@0:       const uword B_n_cols   = B.n_cols;
max@0:       const uword B_n_slices = B.n_slices;
max@0:       
max@0:       for(uword slice=0; slice<B_n_slices; ++slice)
max@0:         {
max@0:         for(uword row=0; row<B_n_rows; ++row)
max@0:           {
max@0:           for(uword col=0; col<B_n_cols; ++col)
max@0:             {
max@0:             out_mem[i] = B.at(row,col,slice);
max@0:             ++i;
max@0:             }
max@0:           }
max@0:         }
max@0:         
max@0:       }
max@0:     }
max@0:   else
max@0:     {
max@0:     const unwrap_cube_check< Cube<eT> > tmp(A, out);
max@0:     const Cube<eT>& B                 = tmp.M;
max@0:     
max@0:     const uword n_elem_to_copy = (std::min)(B.n_elem, in_n_elem);
max@0:     
max@0:     out.set_size(in_n_rows, in_n_cols, in_n_slices);
max@0:     
max@0:     eT* out_mem = out.memptr();
max@0:     
max@0:     if(in_dim == 0)
max@0:       {
max@0:       arrayops::copy( out_mem, B.memptr(), n_elem_to_copy );
max@0:       }
max@0:     else
max@0:       {
max@0:       uword row   = 0;
max@0:       uword col   = 0;
max@0:       uword slice = 0;
max@0:       
max@0:       const uword B_n_rows = B.n_rows;
max@0:       const uword B_n_cols = B.n_cols;
max@0:       
max@0:       for(uword i=0; i<n_elem_to_copy; ++i)
max@0:         {
max@0:         out_mem[i] = B.at(row,col,slice);
max@0:         
max@0:         ++col;
max@0:         
max@0:         if(col >= B_n_cols)
max@0:           {
max@0:           col = 0;
max@0:           ++row;
max@0:           
max@0:           if(row >= B_n_rows)
max@0:             {
max@0:             row = 0;
max@0:             ++slice;
max@0:             }
max@0:           }
max@0:         }
max@0:       }
max@0:     
max@0:     for(uword i=n_elem_to_copy; i<in_n_elem; ++i)
max@0:       {
max@0:       out_mem[i] = eT(0);
max@0:       }
max@0:     
max@0:     }
max@0:   }
max@0: 
max@0: 
max@0: 
max@0: //! @}