max@0: // Copyright (C) 2009-2011 NICTA (www.nicta.com.au)
max@0: // Copyright (C) 2009-2011 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: //! \addtogroup glue_solve
max@0: //! @{
max@0: 
max@0: 
max@0: 
max@0: template<typename T1, typename T2>
max@0: inline
max@0: void
max@0: glue_solve::apply(Mat<typename T1::elem_type>& out, const Glue<T1,T2,glue_solve>& X)
max@0:   {
max@0:   arma_extra_debug_sigprint();
max@0:   
max@0:   typedef typename T1::elem_type eT;
max@0:   
max@0:   Mat<eT> A = X.A.get_ref();
max@0:   
max@0:   const unwrap_check<T2> B_tmp(X.B, out);
max@0:   const Mat<eT>& B = B_tmp.M;
max@0:   
max@0:   arma_debug_check( (A.n_rows != B.n_rows), "solve(): number of rows in A and B must be the same" );
max@0:   
max@0:   bool status;
max@0:   
max@0:   if(A.n_rows == A.n_cols)
max@0:     {
max@0:     const uword mode = X.aux_uword;
max@0:     
max@0:     status = (mode == 0) ? auxlib::solve(out, A, B) : auxlib::solve(out, A, B, true);
max@0:     }
max@0:   else
max@0:   if(A.n_rows > A.n_cols)
max@0:     {
max@0:     arma_extra_debug_print("solve(): detected over-determined system");
max@0:     status = auxlib::solve_od(out, A, B);
max@0:     }
max@0:   else
max@0:     {
max@0:     arma_extra_debug_print("solve(): detected under-determined system");
max@0:     status = auxlib::solve_ud(out, A, B);
max@0:     }
max@0:   
max@0:   if(status == false)
max@0:     {
max@0:     out.reset();
max@0:     arma_bad("solve(): solution not found");
max@0:     }
max@0:   }
max@0: 
max@0: 
max@0: 
max@0: template<typename T1, typename T2>
max@0: inline
max@0: void
max@0: glue_solve_tr::apply(Mat<typename T1::elem_type>& out, const Glue<T1,T2,glue_solve_tr>& X)
max@0:   {
max@0:   arma_extra_debug_sigprint();
max@0:   
max@0:   typedef typename T1::elem_type eT;
max@0:   
max@0:   const unwrap_check<T1> A_tmp(X.A, out);
max@0:   const unwrap_check<T2> B_tmp(X.B, out);
max@0:   
max@0:   const Mat<eT>& A = A_tmp.M;
max@0:   const Mat<eT>& B = B_tmp.M;
max@0:   
max@0:   bool  err_state = false;
max@0:   char* err_msg   = 0;
max@0:   
max@0:   arma_debug_set_error( err_state, err_msg, ((&A) == (&B)),           "solve(): A is an alias of B" );
max@0:   arma_debug_set_error( err_state, err_msg, (A.n_rows != B.n_rows),   "solve(): number of rows in A and B must be the same" );
max@0:   arma_debug_set_error( err_state, err_msg, (A.is_square() == false), "solve(): A is not a square matrix" );
max@0:   
max@0:   arma_debug_check(err_state, err_msg);
max@0:   
max@0:   const bool status = auxlib::solve_tr(out, A, B, X.aux_uword);
max@0:   
max@0:   if(status == false)
max@0:     {
max@0:     out.reset();
max@0:     arma_bad("solve(): solution not found");
max@0:     }
max@0:   }
max@0: 
max@0: 
max@0: 
max@0: //! @}