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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 fn_shift
//! @{
template<typename T1>
arma_warn_unused
arma_inline
typename
enable_if2
<
is_arma_type<T1>::value && resolves_to_vector<T1>::yes,
const Op<T1, op_shift_vec>
>::result
shift
(
const T1& X,
const sword N
)
{
arma_extra_debug_sigprint();
const uword len = (N < 0) ? uword(-N) : uword(N);
const uword neg = (N < 0) ? uword( 1) : uword(0);
return Op<T1, op_shift_vec>(X, len, neg);
}
template<typename T1>
arma_warn_unused
inline
typename
enable_if2
<
is_arma_type<T1>::value && resolves_to_vector<T1>::no,
Mat<typename T1::elem_type>
>::result
shift
(
const T1& X,
const sword N
)
{
arma_extra_debug_sigprint();
typedef typename T1::elem_type eT;
const uword len = (N < 0) ? uword(-N) : uword(N);
const uword neg = (N < 0) ? uword( 1) : uword(0);
quasi_unwrap<T1> U(X);
Mat<eT> out;
op_shift::apply_noalias(out, U.M, len, neg, 0);
return out;
}
template<typename T1>
arma_warn_unused
inline
typename
enable_if2
<
(is_arma_type<T1>::value),
Mat<typename T1::elem_type>
>::result
shift
(
const T1& X,
const sword N,
const uword dim
)
{
arma_extra_debug_sigprint();
typedef typename T1::elem_type eT;
arma_debug_check( (dim > 1), "shift(): parameter 'dim' must be 0 or 1" );
const uword len = (N < 0) ? uword(-N) : uword(N);
const uword neg = (N < 0) ? uword( 1) : uword(0);
quasi_unwrap<T1> U(X);
Mat<eT> out;
op_shift::apply_noalias(out, U.M, len, neg, dim);
return out;
}
//! @}
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