Chris@49: // Copyright (C) 2009-2012 NICTA (www.nicta.com.au)
Chris@49: // Copyright (C) 2009-2012 Conrad Sanderson
Chris@49: // Copyright (C) 2009-2010 Dimitrios Bouzas
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_repmat
Chris@49: //! @{
Chris@49: 
Chris@49: 
Chris@49: 
Chris@49: //! \brief
Chris@49: //! implementation of the 'repeat matrix' operation, used for constructing matrices
Chris@49: template<typename T1>
Chris@49: inline
Chris@49: void
Chris@49: op_repmat::apply(Mat<typename T1::elem_type>& out, const Op<T1,op_repmat>& 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_check<T1> tmp(in.m, out);
Chris@49:   const Mat<eT>& X     = tmp.M;
Chris@49:   
Chris@49:   const uword copies_per_row = in.aux_uword_a;
Chris@49:   const uword copies_per_col = in.aux_uword_b;
Chris@49:   
Chris@49:   const uword X_n_rows = X.n_rows;
Chris@49:   const uword X_n_cols = X.n_cols;
Chris@49:   
Chris@49:   out.set_size(X_n_rows * copies_per_row, X_n_cols * copies_per_col);
Chris@49:   
Chris@49:   const uword out_n_rows = out.n_rows;
Chris@49:   const uword out_n_cols = out.n_cols;
Chris@49:   
Chris@49:   // if( (out_n_rows > 0) && (out_n_cols > 0) )
Chris@49:   //   {
Chris@49:   //   for(uword col = 0; col < out_n_cols; col += X_n_cols)
Chris@49:   //   for(uword row = 0; row < out_n_rows; row += X_n_rows)
Chris@49:   //     {
Chris@49:   //     out.submat(row, col, row+X_n_rows-1, col+X_n_cols-1) = X;
Chris@49:   //     }
Chris@49:   //   }
Chris@49:   
Chris@49:   if( (out_n_rows > 0) && (out_n_cols > 0) )
Chris@49:     {
Chris@49:     if(copies_per_row != 1)
Chris@49:       {
Chris@49:       for(uword col_copy=0; col_copy < copies_per_col; ++col_copy)
Chris@49:         {
Chris@49:         const uword out_col_offset = X_n_cols * col_copy;
Chris@49:         
Chris@49:         for(uword col=0; col < X_n_cols; ++col)
Chris@49:           {
Chris@49:                 eT* out_colptr = out.colptr(col + out_col_offset);
Chris@49:           const eT* X_colptr   = X.colptr(col);
Chris@49:           
Chris@49:           for(uword row_copy=0; row_copy < copies_per_row; ++row_copy)
Chris@49:             {
Chris@49:             const uword out_row_offset = X_n_rows * row_copy;
Chris@49:             
Chris@49:             arrayops::copy( &out_colptr[out_row_offset], X_colptr, X_n_rows );
Chris@49:             }
Chris@49:           }
Chris@49:         }
Chris@49:       }
Chris@49:     else
Chris@49:       {
Chris@49:       for(uword col_copy=0; col_copy < copies_per_col; ++col_copy)
Chris@49:         {
Chris@49:         const uword out_col_offset = X_n_cols * col_copy;
Chris@49:         
Chris@49:         for(uword col=0; col < X_n_cols; ++col)
Chris@49:           {
Chris@49:                 eT* out_colptr = out.colptr(col + out_col_offset);
Chris@49:           const eT* X_colptr   = X.colptr(col);
Chris@49:           
Chris@49:           arrayops::copy( out_colptr, X_colptr, X_n_rows );
Chris@49:           }
Chris@49:         }
Chris@49:       }
Chris@49:     }
Chris@49:   
Chris@49:   }
Chris@49: 
Chris@49: 
Chris@49: 
Chris@49: //! @}