359 lines
7.3 KiB
C++
359 lines
7.3 KiB
C++
// Copyright (C) 2008-2015 National ICT Australia (NICTA)
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//
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// This Source Code Form is subject to the terms of the Mozilla Public
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// License, v. 2.0. If a copy of the MPL was not distributed with this
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// file, You can obtain one at http://mozilla.org/MPL/2.0/.
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// -------------------------------------------------------------------
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//
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// Written by Conrad Sanderson - http://conradsanderson.id.au
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// Written by Ryan Curtin
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//! \addtogroup operator_minus
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//! @{
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//! unary -
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template<typename T1>
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arma_inline
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typename
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enable_if2< is_arma_type<T1>::value, const eOp<T1, eop_neg> >::result
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operator-
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(const T1& X)
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{
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arma_extra_debug_sigprint();
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return eOp<T1,eop_neg>(X);
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}
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//! cancellation of two consecutive negations: -(-T1)
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template<typename T1>
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arma_inline
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const typename Proxy<T1>::stored_type&
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operator-
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(const eOp<T1, eop_neg>& X)
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{
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arma_extra_debug_sigprint();
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return X.P.Q;
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}
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//! Base - scalar
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template<typename T1>
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arma_inline
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typename
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enable_if2< is_arma_type<T1>::value, const eOp<T1, eop_scalar_minus_post> >::result
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operator-
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(
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const T1& X,
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const typename T1::elem_type k
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)
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{
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arma_extra_debug_sigprint();
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return eOp<T1, eop_scalar_minus_post>(X, k);
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}
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//! scalar - Base
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template<typename T1>
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arma_inline
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typename
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enable_if2< is_arma_type<T1>::value, const eOp<T1, eop_scalar_minus_pre> >::result
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operator-
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(
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const typename T1::elem_type k,
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const T1& X
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)
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{
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arma_extra_debug_sigprint();
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return eOp<T1, eop_scalar_minus_pre>(X, k);
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}
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//! complex scalar - non-complex Base
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template<typename T1>
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arma_inline
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typename
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enable_if2
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<
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(is_arma_type<T1>::value && is_cx<typename T1::elem_type>::no),
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const mtOp<typename std::complex<typename T1::pod_type>, T1, op_cx_scalar_minus_pre>
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>::result
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operator-
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(
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const std::complex<typename T1::pod_type>& k,
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const T1& X
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)
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{
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arma_extra_debug_sigprint();
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return mtOp<typename std::complex<typename T1::pod_type>, T1, op_cx_scalar_minus_pre>('j', X, k);
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}
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//! non-complex Base - complex scalar
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template<typename T1>
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arma_inline
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typename
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enable_if2
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<
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(is_arma_type<T1>::value && is_cx<typename T1::elem_type>::no),
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const mtOp<typename std::complex<typename T1::pod_type>, T1, op_cx_scalar_minus_post>
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>::result
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operator-
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(
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const T1& X,
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const std::complex<typename T1::pod_type>& k
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)
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{
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arma_extra_debug_sigprint();
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return mtOp<typename std::complex<typename T1::pod_type>, T1, op_cx_scalar_minus_post>('j', X, k);
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}
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//! subtraction of Base objects with same element type
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template<typename T1, typename T2>
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arma_inline
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typename
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enable_if2
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<
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is_arma_type<T1>::value && is_arma_type<T2>::value && is_same_type<typename T1::elem_type, typename T2::elem_type>::value,
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const eGlue<T1, T2, eglue_minus>
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>::result
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operator-
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(
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const T1& X,
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const T2& Y
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)
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{
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arma_extra_debug_sigprint();
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return eGlue<T1, T2, eglue_minus>(X, Y);
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}
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//! subtraction of Base objects with different element types
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template<typename T1, typename T2>
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inline
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typename
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enable_if2
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<
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(is_arma_type<T1>::value && is_arma_type<T2>::value && (is_same_type<typename T1::elem_type, typename T2::elem_type>::no)),
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const mtGlue<typename promote_type<typename T1::elem_type, typename T2::elem_type>::result, T1, T2, glue_mixed_minus>
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>::result
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operator-
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(
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const T1& X,
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const T2& Y
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)
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{
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arma_extra_debug_sigprint();
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typedef typename T1::elem_type eT1;
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typedef typename T2::elem_type eT2;
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typedef typename promote_type<eT1,eT2>::result out_eT;
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promote_type<eT1,eT2>::check();
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return mtGlue<out_eT, T1, T2, glue_mixed_minus>( X, Y );
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}
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//! unary "-" for sparse objects
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template<typename T1>
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inline
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typename
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enable_if2
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<
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is_arma_sparse_type<T1>::value && is_signed<typename T1::elem_type>::value,
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SpOp<T1,spop_scalar_times>
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>::result
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operator-
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(const T1& X)
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{
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arma_extra_debug_sigprint();
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typedef typename T1::elem_type eT;
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return SpOp<T1,spop_scalar_times>(X, eT(-1));
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}
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//! subtraction of two sparse objects
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template<typename T1, typename T2>
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inline
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typename
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enable_if2
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<
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(is_arma_sparse_type<T1>::value && is_arma_sparse_type<T2>::value && is_same_type<typename T1::elem_type, typename T2::elem_type>::value),
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const SpGlue<T1,T2,spglue_minus>
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>::result
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operator-
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(
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const T1& X,
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const T2& Y
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)
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{
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arma_extra_debug_sigprint();
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return SpGlue<T1,T2,spglue_minus>(X,Y);
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}
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//! subtraction of one sparse and one dense object
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template<typename T1, typename T2>
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inline
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typename
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enable_if2
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<
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(is_arma_sparse_type<T1>::value && is_arma_type<T2>::value && is_same_type<typename T1::elem_type, typename T2::elem_type>::value),
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Mat<typename T1::elem_type>
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>::result
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operator-
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(
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const T1& x,
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const T2& y
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)
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{
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arma_extra_debug_sigprint();
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const SpProxy<T1> pa(x);
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Mat<typename T1::elem_type> result(-y);
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arma_debug_assert_same_size( pa.get_n_rows(), pa.get_n_cols(), result.n_rows, result.n_cols, "subtraction" );
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typename SpProxy<T1>::const_iterator_type it = pa.begin();
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typename SpProxy<T1>::const_iterator_type it_end = pa.end();
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while(it != it_end)
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{
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result.at(it.row(), it.col()) += (*it);
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++it;
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}
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return result;
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}
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//! subtraction of one dense and one sparse object
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template<typename T1, typename T2>
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inline
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typename
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enable_if2
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<
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(is_arma_type<T1>::value && is_arma_sparse_type<T2>::value && is_same_type<typename T1::elem_type, typename T2::elem_type>::value),
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Mat<typename T1::elem_type>
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>::result
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operator-
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(
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const T1& x,
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const T2& y
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)
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{
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arma_extra_debug_sigprint();
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Mat<typename T1::elem_type> result(x);
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const SpProxy<T2> pb(y.get_ref());
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arma_debug_assert_same_size( result.n_rows, result.n_cols, pb.get_n_rows(), pb.get_n_cols(), "subtraction" );
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typename SpProxy<T2>::const_iterator_type it = pb.begin();
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typename SpProxy<T2>::const_iterator_type it_end = pb.end();
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while(it != it_end)
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{
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result.at(it.row(), it.col()) -= (*it);
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++it;
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}
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return result;
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}
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template<typename parent, unsigned int mode, typename T2>
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arma_inline
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Mat<typename parent::elem_type>
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operator-
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(
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const subview_each1<parent,mode>& X,
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const Base<typename parent::elem_type,T2>& Y
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)
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{
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arma_extra_debug_sigprint();
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return subview_each1_aux::operator_minus(X, Y.get_ref());
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}
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template<typename T1, typename parent, unsigned int mode>
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arma_inline
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Mat<typename parent::elem_type>
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operator-
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(
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const Base<typename parent::elem_type,T1>& X,
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const subview_each1<parent,mode>& Y
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)
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{
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arma_extra_debug_sigprint();
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return subview_each1_aux::operator_minus(X.get_ref(), Y);
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}
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template<typename parent, unsigned int mode, typename TB, typename T2>
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arma_inline
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Mat<typename parent::elem_type>
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operator-
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(
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const subview_each2<parent,mode,TB>& X,
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const Base<typename parent::elem_type,T2>& Y
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)
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{
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arma_extra_debug_sigprint();
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return subview_each2_aux::operator_minus(X, Y.get_ref());
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}
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template<typename T1, typename parent, unsigned int mode, typename TB>
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arma_inline
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Mat<typename parent::elem_type>
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operator-
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(
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const Base<typename parent::elem_type,T1>& X,
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const subview_each2<parent,mode,TB>& Y
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)
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{
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arma_extra_debug_sigprint();
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return subview_each2_aux::operator_minus(X.get_ref(), Y);
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}
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//! @}
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