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// SPDX-License-Identifier: Apache-2.0
//
// Copyright 2008-2016 Conrad Sanderson (http://conradsanderson.id.au)
// Copyright 2008-2016 National ICT Australia (NICTA)
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// ------------------------------------------------------------------------
//! \addtogroup spglue_join
//! @{
template<typename T1, typename T2>
inline
void
spglue_join_cols::apply(SpMat<typename T1::elem_type>& out, const SpGlue<T1,T2,spglue_join_cols>& X)
{
arma_extra_debug_sigprint();
typedef typename T1::elem_type eT;
const unwrap_spmat<T1> UA(X.A);
const unwrap_spmat<T2> UB(X.B);
if(UA.is_alias(out) || UB.is_alias(out))
{
SpMat<eT> tmp;
spglue_join_cols::apply_noalias(tmp, UA.M, UB.M);
out.steal_mem(tmp);
}
else
{
spglue_join_cols::apply_noalias(out, UA.M, UB.M);
}
}
template<typename eT>
inline
void
spglue_join_cols::apply_noalias(SpMat<eT>& out, const SpMat<eT>& A, const SpMat<eT>& B)
{
arma_extra_debug_sigprint();
const uword A_n_rows = A.n_rows;
const uword A_n_cols = A.n_cols;
const uword B_n_rows = B.n_rows;
const uword B_n_cols = B.n_cols;
arma_debug_check
(
( (A_n_cols != B_n_cols) && ( (A_n_rows > 0) || (A_n_cols > 0) ) && ( (B_n_rows > 0) || (B_n_cols > 0) ) ),
"join_cols() / join_vert(): number of columns must be the same"
);
out.set_size( A_n_rows + B_n_rows, (std::max)(A_n_cols, B_n_cols) );
if( out.n_elem > 0 )
{
if(A.is_empty() == false)
{
out.submat(0, 0, A_n_rows-1, out.n_cols-1) = A;
}
if(B.is_empty() == false)
{
out.submat(A_n_rows, 0, out.n_rows-1, out.n_cols-1) = B;
}
}
}
template<typename eT, typename T1, typename T2, typename T3>
inline
void
spglue_join_cols::apply(SpMat<eT>& out, const SpBase<eT,T1>& A_expr, const SpBase<eT,T2>& B_expr, const SpBase<eT,T3>& C_expr)
{
arma_extra_debug_sigprint();
const unwrap_spmat<T1> UA(A_expr.get_ref());
const unwrap_spmat<T2> UB(B_expr.get_ref());
const unwrap_spmat<T3> UC(C_expr.get_ref());
const SpMat<eT>& A = UA.M;
const SpMat<eT>& B = UB.M;
const SpMat<eT>& C = UC.M;
const uword out_n_rows = A.n_rows + B.n_rows + C.n_rows;
const uword out_n_cols = (std::max)((std::max)(A.n_cols, B.n_cols), C.n_cols);
arma_debug_check( ((A.n_cols != out_n_cols) && ((A.n_rows > 0) || (A.n_cols > 0))), "join_cols() / join_vert(): number of columns must be the same" );
arma_debug_check( ((B.n_cols != out_n_cols) && ((B.n_rows > 0) || (B.n_cols > 0))), "join_cols() / join_vert(): number of columns must be the same" );
arma_debug_check( ((C.n_cols != out_n_cols) && ((C.n_rows > 0) || (C.n_cols > 0))), "join_cols() / join_vert(): number of columns must be the same" );
out.set_size(out_n_rows, out_n_cols);
if(out.n_elem == 0) { return; }
uword row_start = 0;
uword row_end_p1 = 0;
if(A.n_elem > 0) { row_end_p1 += A.n_rows; out.rows(row_start, row_end_p1 - 1) = A; }
row_start = row_end_p1;
if(B.n_elem > 0) { row_end_p1 += B.n_rows; out.rows(row_start, row_end_p1 - 1) = B; }
row_start = row_end_p1;
if(C.n_elem > 0) { row_end_p1 += C.n_rows; out.rows(row_start, row_end_p1 - 1) = C; }
}
template<typename eT, typename T1, typename T2, typename T3, typename T4>
inline
void
spglue_join_cols::apply(SpMat<eT>& out, const SpBase<eT,T1>& A_expr, const SpBase<eT,T2>& B_expr, const SpBase<eT,T3>& C_expr, const SpBase<eT,T4>& D_expr)
{
arma_extra_debug_sigprint();
const unwrap_spmat<T1> UA(A_expr.get_ref());
const unwrap_spmat<T2> UB(B_expr.get_ref());
const unwrap_spmat<T3> UC(C_expr.get_ref());
const unwrap_spmat<T4> UD(D_expr.get_ref());
const SpMat<eT>& A = UA.M;
const SpMat<eT>& B = UB.M;
const SpMat<eT>& C = UC.M;
const SpMat<eT>& D = UD.M;
const uword out_n_rows = A.n_rows + B.n_rows + C.n_rows + D.n_rows;
const uword out_n_cols = (std::max)(((std::max)((std::max)(A.n_cols, B.n_cols), C.n_cols)), D.n_cols);
arma_debug_check( ((A.n_cols != out_n_cols) && ((A.n_rows > 0) || (A.n_cols > 0))), "join_cols() / join_vert(): number of columns must be the same" );
arma_debug_check( ((B.n_cols != out_n_cols) && ((B.n_rows > 0) || (B.n_cols > 0))), "join_cols() / join_vert(): number of columns must be the same" );
arma_debug_check( ((C.n_cols != out_n_cols) && ((C.n_rows > 0) || (C.n_cols > 0))), "join_cols() / join_vert(): number of columns must be the same" );
arma_debug_check( ((D.n_cols != out_n_cols) && ((D.n_rows > 0) || (D.n_cols > 0))), "join_cols() / join_vert(): number of columns must be the same" );
out.set_size(out_n_rows, out_n_cols);
if(out.n_elem == 0) { return; }
uword row_start = 0;
uword row_end_p1 = 0;
if(A.n_elem > 0) { row_end_p1 += A.n_rows; out.rows(row_start, row_end_p1 - 1) = A; }
row_start = row_end_p1;
if(B.n_elem > 0) { row_end_p1 += B.n_rows; out.rows(row_start, row_end_p1 - 1) = B; }
row_start = row_end_p1;
if(C.n_elem > 0) { row_end_p1 += C.n_rows; out.rows(row_start, row_end_p1 - 1) = C; }
row_start = row_end_p1;
if(D.n_elem > 0) { row_end_p1 += D.n_rows; out.rows(row_start, row_end_p1 - 1) = D; }
}
template<typename T1, typename T2>
inline
void
spglue_join_rows::apply(SpMat<typename T1::elem_type>& out, const SpGlue<T1,T2,spglue_join_rows>& X)
{
arma_extra_debug_sigprint();
typedef typename T1::elem_type eT;
const unwrap_spmat<T1> UA(X.A);
const unwrap_spmat<T2> UB(X.B);
if(UA.is_alias(out) || UB.is_alias(out))
{
SpMat<eT> tmp;
spglue_join_rows::apply_noalias(tmp, UA.M, UB.M);
out.steal_mem(tmp);
}
else
{
spglue_join_rows::apply_noalias(out, UA.M, UB.M);
}
}
template<typename eT>
inline
void
spglue_join_rows::apply_noalias(SpMat<eT>& out, const SpMat<eT>& A, const SpMat<eT>& B)
{
arma_extra_debug_sigprint();
const uword A_n_rows = A.n_rows;
const uword A_n_cols = A.n_cols;
const uword A_n_nz = A.n_nonzero;
const uword B_n_rows = B.n_rows;
const uword B_n_cols = B.n_cols;
const uword B_n_nz = B.n_nonzero;
arma_debug_check
(
( (A_n_rows != B.n_rows) && ( (A_n_rows > 0) || (A_n_cols > 0) ) && ( (B_n_rows > 0) || (B_n_cols > 0) ) ),
"join_rows() / join_horiz(): number of rows must be the same"
);
const uword C_n_rows = (std::max)(A_n_rows, B_n_rows);
const uword C_n_cols = A_n_cols + B_n_cols;
const uword C_n_nz = A_n_nz + B_n_nz;
if( ((C_n_rows * C_n_cols) == 0) || (C_n_nz == 0) )
{
out.zeros(C_n_rows, C_n_cols);
return;
}
out.reserve(C_n_rows, C_n_cols, C_n_nz);
arrayops::copy( access::rwp(out.values), A.values, A_n_nz );
arrayops::copy( access::rwp(out.values) + A_n_nz, B.values, B_n_nz+1 );
arrayops::copy( access::rwp(out.row_indices), A.row_indices, A_n_nz );
arrayops::copy( access::rwp(out.row_indices) + A_n_nz, B.row_indices, B_n_nz+1 );
arrayops::copy( access::rwp(out.col_ptrs), A.col_ptrs, A_n_cols );
arrayops::copy( access::rwp(out.col_ptrs) + A_n_cols, B.col_ptrs, B_n_cols+2 );
arrayops::inplace_plus( access::rwp(out.col_ptrs) + A_n_cols, A_n_nz, B_n_cols+1 );
// // OLD METHOD
//
// umat locs(2, C_n_nz, arma_nozeros_indicator());
// Col<eT> vals( C_n_nz, arma_nozeros_indicator());
//
// uword* locs_mem = locs.memptr();
// eT* vals_mem = vals.memptr();
//
// typename SpMat<eT>::const_iterator A_it = A.begin();
//
// for(uword i=0; i < A_n_nz; ++i)
// {
// const uword row = A_it.row();
// const uword col = A_it.col();
//
// (*locs_mem) = row; locs_mem++;
// (*locs_mem) = col; locs_mem++;
//
// (*vals_mem) = (*A_it); vals_mem++;
//
// ++A_it;
// }
//
// typename SpMat<eT>::const_iterator B_it = B.begin();
//
// for(uword i=0; i < B_n_nz; ++i)
// {
// const uword row = B_it.row();
// const uword col = A_n_cols + B_it.col();
//
// (*locs_mem) = row; locs_mem++;
// (*locs_mem) = col; locs_mem++;
//
// (*vals_mem) = (*B_it); vals_mem++;
//
// ++B_it;
// }
//
// // TODO: the first element of B within C will always have a larger index than the last element of A in C;
// // TODO: so, is sorting really necessary here?
// SpMat<eT> tmp(locs, vals, C_n_rows, C_n_cols, true, false);
//
// out.steal_mem(tmp);
}
template<typename eT, typename T1, typename T2, typename T3>
inline
void
spglue_join_rows::apply(SpMat<eT>& out, const SpBase<eT,T1>& A_expr, const SpBase<eT,T2>& B_expr, const SpBase<eT,T3>& C_expr)
{
arma_extra_debug_sigprint();
const unwrap_spmat<T1> UA(A_expr.get_ref());
const unwrap_spmat<T2> UB(B_expr.get_ref());
const unwrap_spmat<T3> UC(C_expr.get_ref());
const SpMat<eT>& A = UA.M;
const SpMat<eT>& B = UB.M;
const SpMat<eT>& C = UC.M;
SpMat<eT> tmp;
spglue_join_rows::apply_noalias(tmp, A, B);
spglue_join_rows::apply_noalias(out, tmp, C);
}
template<typename eT, typename T1, typename T2, typename T3, typename T4>
inline
void
spglue_join_rows::apply(SpMat<eT>& out, const SpBase<eT,T1>& A_expr, const SpBase<eT,T2>& B_expr, const SpBase<eT,T3>& C_expr, const SpBase<eT,T4>& D_expr)
{
arma_extra_debug_sigprint();
const unwrap_spmat<T1> UA(A_expr.get_ref());
const unwrap_spmat<T2> UB(B_expr.get_ref());
const unwrap_spmat<T3> UC(C_expr.get_ref());
const unwrap_spmat<T4> UD(D_expr.get_ref());
const SpMat<eT>& A = UA.M;
const SpMat<eT>& B = UB.M;
const SpMat<eT>& C = UC.M;
const SpMat<eT>& D = UD.M;
SpMat<eT> AB;
SpMat<eT> ABC;
spglue_join_rows::apply_noalias(AB, A, B);
spglue_join_rows::apply_noalias(ABC, AB, C);
spglue_join_rows::apply_noalias(out, ABC, D);
}
//! @}
|
