Chris@49: // Copyright (C) 2010-2013 NICTA (www.nicta.com.au)
Chris@49: // Copyright (C) 2010-2013 Conrad Sanderson
Chris@49: // Copyright (C) 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_find
Chris@49: //! @{
Chris@49: 
Chris@49: 
Chris@49: 
Chris@49: template<typename T1>
Chris@49: inline
Chris@49: uword
Chris@49: op_find::helper
Chris@49:   (
Chris@49:   Mat<uword>& indices,
Chris@49:   const Base<typename T1::elem_type, T1>& X
Chris@49:   )
Chris@49:   {
Chris@49:   arma_extra_debug_sigprint();
Chris@49:   
Chris@49:   typedef typename T1::elem_type eT;
Chris@49:   
Chris@49:   const Proxy<T1> A(X.get_ref());
Chris@49:   
Chris@49:   const uword n_elem = A.get_n_elem();
Chris@49:   
Chris@49:   indices.set_size(n_elem, 1);
Chris@49:   
Chris@49:   uword* indices_mem = indices.memptr();
Chris@49:   uword  n_nz        = 0;
Chris@49:   
Chris@49:   if(Proxy<T1>::prefer_at_accessor == false)
Chris@49:     {
Chris@49:     typename Proxy<T1>::ea_type PA = A.get_ea();
Chris@49:     
Chris@49:     for(uword i=0; i<n_elem; ++i)
Chris@49:       {
Chris@49:       if(PA[i] != eT(0))  { indices_mem[n_nz] = i;  ++n_nz; }
Chris@49:       }
Chris@49:     }
Chris@49:   else
Chris@49:     {
Chris@49:     const uword n_rows = A.get_n_rows();
Chris@49:     const uword n_cols = A.get_n_cols();
Chris@49:     
Chris@49:     uword i = 0;
Chris@49:     
Chris@49:     for(uword col=0; col < n_cols; ++col)
Chris@49:     for(uword row=0; row < n_rows; ++row)
Chris@49:       {
Chris@49:       if(A.at(row,col) != eT(0))  { indices_mem[n_nz] = i; ++n_nz; }
Chris@49:       
Chris@49:       ++i;
Chris@49:       }
Chris@49:     }
Chris@49:   
Chris@49:   return n_nz;
Chris@49:   }
Chris@49: 
Chris@49: 
Chris@49: 
Chris@49: template<typename T1, typename op_type>
Chris@49: inline
Chris@49: uword
Chris@49: op_find::helper
Chris@49:   (
Chris@49:   Mat<uword>& indices,
Chris@49:   const mtOp<uword, T1, op_type>& X,
Chris@49:   const typename arma_op_rel_only<op_type>::result           junk1,
Chris@49:   const typename arma_not_cx<typename T1::elem_type>::result junk2
Chris@49:   )
Chris@49:   {
Chris@49:   arma_extra_debug_sigprint();
Chris@49:   arma_ignore(junk1);
Chris@49:   arma_ignore(junk2);
Chris@49:   
Chris@49:   typedef typename T1::elem_type eT;
Chris@49:   
Chris@49:   const eT val = X.aux;
Chris@49:   
Chris@49:   const Proxy<T1> A(X.m);
Chris@49:   
Chris@49:   const uword n_elem = A.get_n_elem();
Chris@49:   
Chris@49:   indices.set_size(n_elem, 1);
Chris@49:   
Chris@49:   uword* indices_mem = indices.memptr();
Chris@49:   uword  n_nz        = 0;
Chris@49:   
Chris@49:   if(Proxy<T1>::prefer_at_accessor == false)
Chris@49:     {
Chris@49:     typename Proxy<T1>::ea_type PA = A.get_ea();
Chris@49:     
Chris@49:     uword i,j;
Chris@49:     for(i=0, j=1; j < n_elem; i+=2, j+=2)
Chris@49:       {
Chris@49:       const eT tpi = PA[i];
Chris@49:       const eT tpj = PA[j];
Chris@49:       
Chris@49:       bool not_zero_i;
Chris@49:       bool not_zero_j;
Chris@49:       
Chris@49:            if(is_same_type<op_type, op_rel_lt_pre   >::value == true)  { not_zero_i = (val <  tpi); }
Chris@49:       else if(is_same_type<op_type, op_rel_lt_post  >::value == true)  { not_zero_i = (tpi <  val); }
Chris@49:       else if(is_same_type<op_type, op_rel_gt_pre   >::value == true)  { not_zero_i = (val >  tpi); }
Chris@49:       else if(is_same_type<op_type, op_rel_gt_post  >::value == true)  { not_zero_i = (tpi >  val); }
Chris@49:       else if(is_same_type<op_type, op_rel_lteq_pre >::value == true)  { not_zero_i = (val <= tpi); }
Chris@49:       else if(is_same_type<op_type, op_rel_lteq_post>::value == true)  { not_zero_i = (tpi <= val); }
Chris@49:       else if(is_same_type<op_type, op_rel_gteq_pre >::value == true)  { not_zero_i = (val >= tpi); }
Chris@49:       else if(is_same_type<op_type, op_rel_gteq_post>::value == true)  { not_zero_i = (tpi >= val); }
Chris@49:       else if(is_same_type<op_type, op_rel_eq       >::value == true)  { not_zero_i = (tpi == val); }
Chris@49:       else if(is_same_type<op_type, op_rel_noteq    >::value == true)  { not_zero_i = (tpi != val); }
Chris@49:       else not_zero_i = false;
Chris@49:       
Chris@49:            if(is_same_type<op_type, op_rel_lt_pre   >::value == true)  { not_zero_j = (val <  tpj); }
Chris@49:       else if(is_same_type<op_type, op_rel_lt_post  >::value == true)  { not_zero_j = (tpj <  val); }
Chris@49:       else if(is_same_type<op_type, op_rel_gt_pre   >::value == true)  { not_zero_j = (val >  tpj); }
Chris@49:       else if(is_same_type<op_type, op_rel_gt_post  >::value == true)  { not_zero_j = (tpj >  val); }
Chris@49:       else if(is_same_type<op_type, op_rel_lteq_pre >::value == true)  { not_zero_j = (val <= tpj); }
Chris@49:       else if(is_same_type<op_type, op_rel_lteq_post>::value == true)  { not_zero_j = (tpj <= val); }
Chris@49:       else if(is_same_type<op_type, op_rel_gteq_pre >::value == true)  { not_zero_j = (val >= tpj); }
Chris@49:       else if(is_same_type<op_type, op_rel_gteq_post>::value == true)  { not_zero_j = (tpj >= val); }
Chris@49:       else if(is_same_type<op_type, op_rel_eq       >::value == true)  { not_zero_j = (tpj == val); }
Chris@49:       else if(is_same_type<op_type, op_rel_noteq    >::value == true)  { not_zero_j = (tpj != val); }
Chris@49:       else not_zero_j = false;
Chris@49:       
Chris@49:       if(not_zero_i == true)  { indices_mem[n_nz] = i;  ++n_nz; }
Chris@49:       if(not_zero_j == true)  { indices_mem[n_nz] = j;  ++n_nz; }
Chris@49:       }
Chris@49:     
Chris@49:     if(i < n_elem)
Chris@49:       {
Chris@49:       bool not_zero;
Chris@49:       
Chris@49:       const eT tmp = PA[i];
Chris@49:       
Chris@49:            if(is_same_type<op_type, op_rel_lt_pre   >::value == true)  { not_zero = (val <  tmp); }
Chris@49:       else if(is_same_type<op_type, op_rel_lt_post  >::value == true)  { not_zero = (tmp <  val); }
Chris@49:       else if(is_same_type<op_type, op_rel_gt_pre   >::value == true)  { not_zero = (val >  tmp); }
Chris@49:       else if(is_same_type<op_type, op_rel_gt_post  >::value == true)  { not_zero = (tmp >  val); }
Chris@49:       else if(is_same_type<op_type, op_rel_lteq_pre >::value == true)  { not_zero = (val <= tmp); }
Chris@49:       else if(is_same_type<op_type, op_rel_lteq_post>::value == true)  { not_zero = (tmp <= val); }
Chris@49:       else if(is_same_type<op_type, op_rel_gteq_pre >::value == true)  { not_zero = (val >= tmp); }
Chris@49:       else if(is_same_type<op_type, op_rel_gteq_post>::value == true)  { not_zero = (tmp >= val); }
Chris@49:       else if(is_same_type<op_type, op_rel_eq       >::value == true)  { not_zero = (tmp == val); }
Chris@49:       else if(is_same_type<op_type, op_rel_noteq    >::value == true)  { not_zero = (tmp != val); }
Chris@49:       else not_zero = false;
Chris@49:       
Chris@49:       if(not_zero == true)  { indices_mem[n_nz] = i;  ++n_nz; }
Chris@49:       }
Chris@49:     }
Chris@49:   else
Chris@49:     {
Chris@49:     const uword n_rows = A.get_n_rows();
Chris@49:     const uword n_cols = A.get_n_cols();
Chris@49:     
Chris@49:     uword i = 0;
Chris@49:     
Chris@49:     for(uword col=0; col < n_cols; ++col)
Chris@49:     for(uword row=0; row < n_rows; ++row)
Chris@49:       {
Chris@49:       const eT tmp = A.at(row,col);
Chris@49:       
Chris@49:       bool not_zero;
Chris@49:       
Chris@49:            if(is_same_type<op_type, op_rel_lt_pre   >::value == true)  { not_zero = (val <  tmp); }
Chris@49:       else if(is_same_type<op_type, op_rel_lt_post  >::value == true)  { not_zero = (tmp <  val); }
Chris@49:       else if(is_same_type<op_type, op_rel_gt_pre   >::value == true)  { not_zero = (val >  tmp); }
Chris@49:       else if(is_same_type<op_type, op_rel_gt_post  >::value == true)  { not_zero = (tmp >  val); }
Chris@49:       else if(is_same_type<op_type, op_rel_lteq_pre >::value == true)  { not_zero = (val <= tmp); }
Chris@49:       else if(is_same_type<op_type, op_rel_lteq_post>::value == true)  { not_zero = (tmp <= val); }
Chris@49:       else if(is_same_type<op_type, op_rel_gteq_pre >::value == true)  { not_zero = (val >= tmp); }
Chris@49:       else if(is_same_type<op_type, op_rel_gteq_post>::value == true)  { not_zero = (tmp >= val); }
Chris@49:       else if(is_same_type<op_type, op_rel_eq       >::value == true)  { not_zero = (tmp == val); }
Chris@49:       else if(is_same_type<op_type, op_rel_noteq    >::value == true)  { not_zero = (tmp != val); }
Chris@49:       else not_zero = false;
Chris@49:       
Chris@49:       if(not_zero == true)  { indices_mem[n_nz] = i;  ++n_nz; }
Chris@49:       
Chris@49:       ++i;
Chris@49:       }
Chris@49:     }
Chris@49:   
Chris@49:   return n_nz;
Chris@49:   }
Chris@49: 
Chris@49: 
Chris@49: 
Chris@49: template<typename T1, typename op_type>
Chris@49: inline
Chris@49: uword
Chris@49: op_find::helper
Chris@49:   (
Chris@49:   Mat<uword>& indices,
Chris@49:   const mtOp<uword, T1, op_type>& X,
Chris@49:   const typename arma_op_rel_only<op_type>::result            junk1,
Chris@49:   const typename arma_cx_only<typename T1::elem_type>::result junk2
Chris@49:   )
Chris@49:   {
Chris@49:   arma_extra_debug_sigprint();
Chris@49:   arma_ignore(junk1);
Chris@49:   arma_ignore(junk2);
Chris@49:   
Chris@49:   typedef typename T1::elem_type      eT;
Chris@49:   typedef typename Proxy<T1>::ea_type ea_type;
Chris@49:   
Chris@49:   const eT val = X.aux;
Chris@49:   
Chris@49:   const Proxy<T1> A(X.m);
Chris@49:   
Chris@49:   ea_type     PA     = A.get_ea();
Chris@49:   const uword n_elem = A.get_n_elem();
Chris@49:   
Chris@49:   indices.set_size(n_elem, 1);
Chris@49:   
Chris@49:   uword* indices_mem = indices.memptr();
Chris@49:   uword  n_nz        = 0;
Chris@49:   
Chris@49:   for(uword i=0; i<n_elem; ++i)
Chris@49:     {
Chris@49:     const eT tmp = PA[i];
Chris@49:     
Chris@49:     bool not_zero;
Chris@49:     
Chris@49:          if(is_same_type<op_type, op_rel_eq   >::value == true)  { not_zero = (tmp == val); }
Chris@49:     else if(is_same_type<op_type, op_rel_noteq>::value == true)  { not_zero = (tmp != val); }
Chris@49:     else not_zero = false;
Chris@49:     
Chris@49:     if(not_zero == true) { indices_mem[n_nz] = i;  ++n_nz; }
Chris@49:     }
Chris@49:   
Chris@49:   return n_nz;
Chris@49:   }
Chris@49: 
Chris@49: 
Chris@49: 
Chris@49: template<typename T1, typename T2, typename glue_type>
Chris@49: inline
Chris@49: uword
Chris@49: op_find::helper
Chris@49:   (
Chris@49:   Mat<uword>& indices,
Chris@49:   const mtGlue<uword, T1, T2, glue_type>& X,
Chris@49:   const typename arma_glue_rel_only<glue_type>::result       junk1,
Chris@49:   const typename arma_not_cx<typename T1::elem_type>::result junk2,
Chris@49:   const typename arma_not_cx<typename T2::elem_type>::result junk3
Chris@49:   )
Chris@49:   {
Chris@49:   arma_extra_debug_sigprint();
Chris@49:   arma_ignore(junk1);
Chris@49:   arma_ignore(junk2);
Chris@49:   arma_ignore(junk3);
Chris@49:   
Chris@49:   typedef typename T1::elem_type eT1;
Chris@49:   typedef typename T2::elem_type eT2;
Chris@49:   
Chris@49:   typedef typename Proxy<T1>::ea_type ea_type1;
Chris@49:   typedef typename Proxy<T2>::ea_type ea_type2;
Chris@49:   
Chris@49:   const Proxy<T1> A(X.A);
Chris@49:   const Proxy<T2> B(X.B);
Chris@49:   
Chris@49:   arma_debug_assert_same_size(A, B, "relational operator");
Chris@49:   
Chris@49:   ea_type1 PA = A.get_ea();
Chris@49:   ea_type2 PB = B.get_ea();
Chris@49:   
Chris@49:   const uword n_elem = B.get_n_elem();
Chris@49:   
Chris@49:   indices.set_size(n_elem, 1);
Chris@49:   
Chris@49:   uword* indices_mem = indices.memptr();
Chris@49:   uword  n_nz        = 0;
Chris@49:   
Chris@49:   for(uword i=0; i<n_elem; ++i)
Chris@49:     {
Chris@49:     const eT1 tmp1 = PA[i];
Chris@49:     const eT2 tmp2 = PB[i];
Chris@49:     
Chris@49:     bool not_zero;
Chris@49:     
Chris@49:          if(is_same_type<glue_type, glue_rel_lt    >::value == true)  { not_zero = (tmp1 <  tmp2); }
Chris@49:     else if(is_same_type<glue_type, glue_rel_gt    >::value == true)  { not_zero = (tmp1 >  tmp2); }
Chris@49:     else if(is_same_type<glue_type, glue_rel_lteq  >::value == true)  { not_zero = (tmp1 <= tmp2); }
Chris@49:     else if(is_same_type<glue_type, glue_rel_gteq  >::value == true)  { not_zero = (tmp1 >= tmp2); }
Chris@49:     else if(is_same_type<glue_type, glue_rel_eq    >::value == true)  { not_zero = (tmp1 == tmp2); }
Chris@49:     else if(is_same_type<glue_type, glue_rel_noteq >::value == true)  { not_zero = (tmp1 != tmp2); }
Chris@49:     else not_zero = false;
Chris@49:     
Chris@49:     if(not_zero == true)  { indices_mem[n_nz] = i;  ++n_nz; }
Chris@49:     }
Chris@49:   
Chris@49:   return n_nz;
Chris@49:   }
Chris@49: 
Chris@49: 
Chris@49: 
Chris@49: template<typename T1, typename T2, typename glue_type>
Chris@49: inline
Chris@49: uword
Chris@49: op_find::helper
Chris@49:   (
Chris@49:   Mat<uword>& indices,
Chris@49:   const mtGlue<uword, T1, T2, glue_type>& X,
Chris@49:   const typename arma_glue_rel_only<glue_type>::result        junk1,
Chris@49:   const typename arma_cx_only<typename T1::elem_type>::result junk2,
Chris@49:   const typename arma_cx_only<typename T2::elem_type>::result junk3
Chris@49:   )
Chris@49:   {
Chris@49:   arma_extra_debug_sigprint();
Chris@49:   arma_ignore(junk1);
Chris@49:   arma_ignore(junk2);
Chris@49:   arma_ignore(junk3);
Chris@49:   
Chris@49:   typedef typename Proxy<T1>::ea_type ea_type1;
Chris@49:   typedef typename Proxy<T2>::ea_type ea_type2;
Chris@49:   
Chris@49:   const Proxy<T1> A(X.A);
Chris@49:   const Proxy<T2> B(X.B);
Chris@49:   
Chris@49:   arma_debug_assert_same_size(A, B, "relational operator");
Chris@49:   
Chris@49:   ea_type1 PA = A.get_ea();
Chris@49:   ea_type2 PB = B.get_ea();
Chris@49:   
Chris@49:   const uword n_elem = B.get_n_elem();
Chris@49:   
Chris@49:   indices.set_size(n_elem, 1);
Chris@49:   
Chris@49:   uword* indices_mem = indices.memptr();
Chris@49:   uword  n_nz        = 0;
Chris@49:   
Chris@49:   for(uword i=0; i<n_elem; ++i)
Chris@49:     {
Chris@49:     bool not_zero;
Chris@49:     
Chris@49:          if(is_same_type<glue_type, glue_rel_eq    >::value == true)  { not_zero = (PA[i] == PB[i]); }
Chris@49:     else if(is_same_type<glue_type, glue_rel_noteq >::value == true)  { not_zero = (PA[i] != PB[i]); }
Chris@49:     else not_zero = false;
Chris@49:     
Chris@49:     if(not_zero == true)  { indices_mem[n_nz] = i;  ++n_nz; }
Chris@49:     }
Chris@49:   
Chris@49:   return n_nz;
Chris@49:   }
Chris@49: 
Chris@49: 
Chris@49: 
Chris@49: template<typename T1>
Chris@49: inline
Chris@49: void
Chris@49: op_find::apply(Mat<uword>& out, const mtOp<uword, T1, op_find>& X)
Chris@49:   {
Chris@49:   arma_extra_debug_sigprint();
Chris@49:   
Chris@49:   const uword k    = X.aux_uword_a;
Chris@49:   const uword type = X.aux_uword_b;
Chris@49:   
Chris@49:   Mat<uword> indices;
Chris@49:   const uword n_nz = op_find::helper(indices, X.m);
Chris@49:   
Chris@49:   if(n_nz > 0)
Chris@49:     {
Chris@49:     if(type == 0)   // "first"
Chris@49:       {
Chris@49:       out = (k > 0 && k <= n_nz) ? indices.rows(0,      k-1   ) : indices.rows(0, n_nz-1);
Chris@49:       }
Chris@49:     else   // "last"
Chris@49:       {
Chris@49:       out = (k > 0 && k <= n_nz) ? indices.rows(n_nz-k, n_nz-1) : indices.rows(0, n_nz-1);
Chris@49:       }
Chris@49:     }
Chris@49:   else
Chris@49:     {
Chris@49:     out.set_size(0,1);  // empty column vector
Chris@49:     }
Chris@49:   }
Chris@49: 
Chris@49: 
Chris@49: 
Chris@49: //! @}