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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 op_inv_gen
//! @{
class op_inv_gen_default
: public traits_op_default
{
public:
template<typename T1>
inline static void apply(Mat<typename T1::elem_type>& out, const Op<T1,op_inv_gen_default>& in);
template<typename T1>
inline static bool apply_direct(Mat<typename T1::elem_type>& out, const Base<typename T1::elem_type,T1>& expr, const char* caller_sig);
};
class op_inv_gen_full
: public traits_op_default
{
public:
template<const uword row, const uword col>
struct pos
{
static constexpr uword n2 = row + col*2;
static constexpr uword n3 = row + col*3;
};
template<typename T1>
inline static void apply(Mat<typename T1::elem_type>& out, const Op<T1,op_inv_gen_full>& in);
template<typename T1, const bool has_user_flags = true>
inline static bool apply_direct(Mat<typename T1::elem_type>& out, const Base<typename T1::elem_type,T1>& expr, const char* caller_sig, const uword flags);
template<typename eT>
arma_cold inline static bool apply_tiny_2x2(Mat<eT>& X);
template<typename eT>
arma_cold inline static bool apply_tiny_3x3(Mat<eT>& X);
};
template<typename T>
struct op_inv_gen_state
{
uword size = uword(0);
T rcond = T(0);
bool is_diag = false;
bool is_sym = false;
};
class op_inv_gen_rcond
: public traits_op_default
{
public:
template<typename T1>
inline static bool apply_direct(Mat<typename T1::elem_type>& out_inv, op_inv_gen_state<typename T1::pod_type>& out_state, const Base<typename T1::elem_type,T1>& expr);
};
namespace inv_opts
{
struct opts
{
const uword flags;
inline constexpr explicit opts(const uword in_flags);
inline const opts operator+(const opts& rhs) const;
};
inline
constexpr
opts::opts(const uword in_flags)
: flags(in_flags)
{}
inline
const opts
opts::operator+(const opts& rhs) const
{
const opts result( flags | rhs.flags );
return result;
}
// The values below (eg. 1u << 1) are for internal Armadillo use only.
// The values can change without notice.
static constexpr uword flag_none = uword(0 );
static constexpr uword flag_fast = uword(1u << 0);
static constexpr uword flag_tiny = uword(1u << 0); // deprecated
static constexpr uword flag_allow_approx = uword(1u << 1);
static constexpr uword flag_likely_sympd = uword(1u << 2); // deprecated
static constexpr uword flag_no_sympd = uword(1u << 3); // deprecated
static constexpr uword flag_no_ugly = uword(1u << 4);
struct opts_none : public opts { inline constexpr opts_none() : opts(flag_none ) {} };
struct opts_fast : public opts { inline constexpr opts_fast() : opts(flag_fast ) {} };
struct opts_tiny : public opts { inline constexpr opts_tiny() : opts(flag_tiny ) {} };
struct opts_allow_approx : public opts { inline constexpr opts_allow_approx() : opts(flag_allow_approx) {} };
struct opts_likely_sympd : public opts { inline constexpr opts_likely_sympd() : opts(flag_likely_sympd) {} };
struct opts_no_sympd : public opts { inline constexpr opts_no_sympd() : opts(flag_no_sympd ) {} };
struct opts_no_ugly : public opts { inline constexpr opts_no_ugly() : opts(flag_no_ugly ) {} };
static constexpr opts_none none;
static constexpr opts_fast fast;
static constexpr opts_tiny tiny;
static constexpr opts_allow_approx allow_approx;
static constexpr opts_likely_sympd likely_sympd;
static constexpr opts_no_sympd no_sympd;
static constexpr opts_no_ugly no_ugly;
}
//! @}
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