Chris@49: // Copyright (C) 2008-2012 NICTA (www.nicta.com.au)
Chris@49: // Copyright (C) 2008-2012 Conrad Sanderson
Chris@49: // 
Chris@49: // This Source Code Form is subject to the terms of the Mozilla Public
Chris@49: // License, v. 2.0. If a copy of the MPL was not distributed with this
Chris@49: // file, You can obtain one at http://mozilla.org/MPL/2.0/.
Chris@49: 
Chris@49: 
Chris@49: 
Chris@49: //! \addtogroup op_reshape
Chris@49: //! @{
Chris@49: 
Chris@49: 
Chris@49: 
Chris@49: template<typename T1>
Chris@49: inline
Chris@49: void
Chris@49: op_reshape::apply(Mat<typename T1::elem_type>& out, const Op<T1,op_reshape>& in)
Chris@49:   {
Chris@49:   arma_extra_debug_sigprint();
Chris@49:   
Chris@49:   typedef typename T1::elem_type eT;
Chris@49:   
Chris@49:   const unwrap<T1>   A_tmp(in.m);
Chris@49:   const Mat<eT>& A = A_tmp.M;
Chris@49:   
Chris@49:   const bool is_alias = (&out == &A);
Chris@49:   
Chris@49:   const uword in_n_rows = in.aux_uword_a;
Chris@49:   const uword in_n_cols = in.aux_uword_b;
Chris@49:   const uword in_dim    = in.aux_uword_c;
Chris@49:   
Chris@49:   const uword in_n_elem = in_n_rows * in_n_cols;
Chris@49:   
Chris@49:   if(A.n_elem == in_n_elem)
Chris@49:     {
Chris@49:     if(in_dim == 0)
Chris@49:       {
Chris@49:       if(is_alias == false)
Chris@49:         {
Chris@49:         out.set_size(in_n_rows, in_n_cols);
Chris@49:         arrayops::copy( out.memptr(), A.memptr(), out.n_elem );
Chris@49:         }
Chris@49:       else  // &out == &A, i.e. inplace resize
Chris@49:         {
Chris@49:         const bool same_size = ( (out.n_rows == in_n_rows) && (out.n_cols == in_n_cols) );
Chris@49:         
Chris@49:         if(same_size == false)
Chris@49:           {
Chris@49:           arma_debug_check
Chris@49:             (
Chris@49:             (out.mem_state == 3),
Chris@49:             "reshape(): size can't be changed as template based size specification is in use"
Chris@49:             );
Chris@49:           
Chris@49:           access::rw(out.n_rows) = in_n_rows;
Chris@49:           access::rw(out.n_cols) = in_n_cols;
Chris@49:           }
Chris@49:         }
Chris@49:       }
Chris@49:     else
Chris@49:       {
Chris@49:       unwrap_check< Mat<eT> > B_tmp(A, is_alias);
Chris@49:       const Mat<eT>& B      = B_tmp.M;
Chris@49:       
Chris@49:       out.set_size(in_n_rows, in_n_cols);
Chris@49:       
Chris@49:       eT* out_mem = out.memptr();
Chris@49:       uword i = 0;
Chris@49:       
Chris@49:       const uword B_n_rows = B.n_rows;
Chris@49:       const uword B_n_cols = B.n_cols;
Chris@49:       
Chris@49:       for(uword row=0; row<B_n_rows; ++row)
Chris@49:       for(uword col=0; col<B_n_cols; ++col)
Chris@49:         {
Chris@49:         out_mem[i] = B.at(row,col);
Chris@49:         ++i;
Chris@49:         }
Chris@49:       }
Chris@49:     }
Chris@49:   else
Chris@49:     {
Chris@49:     const unwrap_check< Mat<eT> > B_tmp(A, is_alias);
Chris@49:     const Mat<eT>& B            = B_tmp.M;
Chris@49:     
Chris@49:     const uword n_elem_to_copy = (std::min)(B.n_elem, in_n_elem);
Chris@49:     
Chris@49:     out.set_size(in_n_rows, in_n_cols);
Chris@49:     
Chris@49:     eT* out_mem = out.memptr();
Chris@49:     
Chris@49:     if(in_dim == 0)
Chris@49:       {
Chris@49:       arrayops::copy( out_mem, B.memptr(), n_elem_to_copy );
Chris@49:       }
Chris@49:     else
Chris@49:       {
Chris@49:       uword row = 0;
Chris@49:       uword col = 0;
Chris@49:       
Chris@49:       const uword B_n_cols = B.n_cols;
Chris@49:       
Chris@49:       for(uword i=0; i<n_elem_to_copy; ++i)
Chris@49:         {
Chris@49:         out_mem[i] = B.at(row,col);
Chris@49:         
Chris@49:         ++col;
Chris@49:         
Chris@49:         if(col >= B_n_cols)
Chris@49:           {
Chris@49:           col = 0;
Chris@49:           ++row;
Chris@49:           }
Chris@49:         }
Chris@49:       }
Chris@49:     
Chris@49:     for(uword i=n_elem_to_copy; i<in_n_elem; ++i)
Chris@49:       {
Chris@49:       out_mem[i] = eT(0);
Chris@49:       }
Chris@49:     
Chris@49:     }
Chris@49:   }
Chris@49: 
Chris@49: 
Chris@49: 
Chris@49: template<typename T1>
Chris@49: inline
Chris@49: void
Chris@49: op_reshape::apply(Cube<typename T1::elem_type>& out, const OpCube<T1,op_reshape>& in)
Chris@49:   {
Chris@49:   arma_extra_debug_sigprint();
Chris@49:   
Chris@49:   typedef typename T1::elem_type eT;
Chris@49:   
Chris@49:   const unwrap_cube<T1> A_tmp(in.m);
Chris@49:   const Cube<eT>& A   = A_tmp.M;
Chris@49:   
Chris@49:   const uword in_n_rows   = in.aux_uword_a;
Chris@49:   const uword in_n_cols   = in.aux_uword_b;
Chris@49:   const uword in_n_slices = in.aux_uword_c;
Chris@49:   const uword in_dim      = in.aux_uword_d;
Chris@49:   
Chris@49:   const uword in_n_elem = in_n_rows * in_n_cols * in_n_slices;
Chris@49:   
Chris@49:   if(A.n_elem == in_n_elem)
Chris@49:     {
Chris@49:     if(in_dim == 0)
Chris@49:       {
Chris@49:       if(&out != &A)
Chris@49:         {
Chris@49:         out.set_size(in_n_rows, in_n_cols, in_n_slices);
Chris@49:         arrayops::copy( out.memptr(), A.memptr(), out.n_elem );
Chris@49:         }
Chris@49:       else  // &out == &A, i.e. inplace resize
Chris@49:         {
Chris@49:         const bool same_size = ( (out.n_rows == in_n_rows) && (out.n_cols == in_n_cols) && (out.n_slices == in_n_slices) );
Chris@49:         
Chris@49:         if(same_size == false)
Chris@49:           {
Chris@49:           arma_debug_check
Chris@49:             (
Chris@49:             (out.mem_state == 3),
Chris@49:             "reshape(): size can't be changed as template based size specification is in use"
Chris@49:             );
Chris@49:           
Chris@49:           out.delete_mat();
Chris@49:           
Chris@49:           access::rw(out.n_rows)       = in_n_rows;
Chris@49:           access::rw(out.n_cols)       = in_n_cols;
Chris@49:           access::rw(out.n_elem_slice) = in_n_rows * in_n_cols;
Chris@49:           access::rw(out.n_slices)     = in_n_slices;
Chris@49:           
Chris@49:           out.create_mat();
Chris@49:           }
Chris@49:         }
Chris@49:       }
Chris@49:     else
Chris@49:       {
Chris@49:       unwrap_cube_check< Cube<eT> > B_tmp(A, out);
Chris@49:       const Cube<eT>& B           = B_tmp.M;
Chris@49:       
Chris@49:       out.set_size(in_n_rows, in_n_cols, in_n_slices);
Chris@49:       
Chris@49:       eT* out_mem = out.memptr();
Chris@49:       uword i = 0;
Chris@49:       
Chris@49:       const uword B_n_rows   = B.n_rows;
Chris@49:       const uword B_n_cols   = B.n_cols;
Chris@49:       const uword B_n_slices = B.n_slices;
Chris@49:       
Chris@49:       for(uword slice=0; slice<B_n_slices; ++slice)
Chris@49:       for(uword row=0; row<B_n_rows; ++row)
Chris@49:       for(uword col=0; col<B_n_cols; ++col)
Chris@49:         {
Chris@49:         out_mem[i] = B.at(row,col,slice);
Chris@49:         ++i;
Chris@49:         }
Chris@49:       }
Chris@49:     }
Chris@49:   else
Chris@49:     {
Chris@49:     const unwrap_cube_check< Cube<eT> > B_tmp(A, out);
Chris@49:     const Cube<eT>& B                 = B_tmp.M;
Chris@49:     
Chris@49:     const uword n_elem_to_copy = (std::min)(B.n_elem, in_n_elem);
Chris@49:     
Chris@49:     out.set_size(in_n_rows, in_n_cols, in_n_slices);
Chris@49:     
Chris@49:     eT* out_mem = out.memptr();
Chris@49:     
Chris@49:     if(in_dim == 0)
Chris@49:       {
Chris@49:       arrayops::copy( out_mem, B.memptr(), n_elem_to_copy );
Chris@49:       }
Chris@49:     else
Chris@49:       {
Chris@49:       uword row   = 0;
Chris@49:       uword col   = 0;
Chris@49:       uword slice = 0;
Chris@49:       
Chris@49:       const uword B_n_rows = B.n_rows;
Chris@49:       const uword B_n_cols = B.n_cols;
Chris@49:       
Chris@49:       for(uword i=0; i<n_elem_to_copy; ++i)
Chris@49:         {
Chris@49:         out_mem[i] = B.at(row,col,slice);
Chris@49:         
Chris@49:         ++col;
Chris@49:         
Chris@49:         if(col >= B_n_cols)
Chris@49:           {
Chris@49:           col = 0;
Chris@49:           ++row;
Chris@49:           
Chris@49:           if(row >= B_n_rows)
Chris@49:             {
Chris@49:             row = 0;
Chris@49:             ++slice;
Chris@49:             }
Chris@49:           }
Chris@49:         }
Chris@49:       }
Chris@49:     
Chris@49:     for(uword i=n_elem_to_copy; i<in_n_elem; ++i)
Chris@49:       {
Chris@49:       out_mem[i] = eT(0);
Chris@49:       }
Chris@49:     
Chris@49:     }
Chris@49:   }
Chris@49: 
Chris@49: 
Chris@49: 
Chris@49: //! @}