blas.hpp

boost库提供标准的C++ API 配合dev c++使用,功能更加强大

//
//  Copyright (c) 2000-2002
//  Joerg Walter, Mathias Koch
//
//  Permission to use, copy, modify, distribute and sell this software
//  and its documentation for any purpose is hereby granted without fee,
//  provided that the above copyright notice appear in all copies and
//  that both that copyright notice and this permission notice appear
//  in supporting documentation.  The authors make no representations
//  about the suitability of this software for any purpose.
//  It is provided "as is" without express or implied warranty.
//
//  The authors gratefully acknowledge the support of
//  GeNeSys mbH & Co. KG in producing this work.
//

#ifndef BOOST_UBLAS_BLAS_H
#define BOOST_UBLAS_BLAS_H

namespace boost { namespace numeric { namespace ublas {

    namespace blas_1 {

        template<class V>
        typename type_traits<typename V::value_type>::real_type
        asum (const V &v) {
            return norm_1 (v);
        }
        template<class V>
        typename type_traits<typename V::value_type>::real_type
        nrm2 (const V &v) {
            return norm_2 (v);
        }
        template<class V>
        typename type_traits<typename V::value_type>::real_type
        amax (const V &v) {
            return norm_inf (v);
        }

        template<class V1, class V2>
        typename promote_traits<typename V1::value_type, typename V2::value_type>::promote_type
        dot (const V1 &v1, const V2 &v2) {
            return inner_prod (v1, v2);
        }

        template<class V1, class V2>
        V1 &
        copy (V1 &v1, const V2 &v2) {
            return v1.assign (v2);
        }

        template<class V1, class V2>
        void swap (V1 &v1, V2 &v2) {
            v1.swap (v2);
        }

        template<class V, class T>
        V &
        scal (V &v, const T &t) {
            return v *= t;
        }

        template<class V1, class T, class V2>
        V1 &
        axpy (V1 &v1, const T &t, const V2 &v2) {
            return v1.plus_assign (t * v2);
        }

        template<class T1, class V1, class T2, class V2>
        void
        rot (const T1 &t1, V1 &v1, const T2 &t2, V2 &v2) {
            typedef typename promote_traits<BOOST_UBLAS_TYPENAME V1::value_type, BOOST_UBLAS_TYPENAME V2::value_type>::promote_type promote_type;
            vector<promote_type> vt (t1 * v1 + t2 * v2);
            v2.assign (- t2 * v1 + t1 * v2);
            v1.assign (vt);
        }

    }

    namespace blas_2 {

        template<class V, class M>
        V &
        tmv (V &v, const M &m) {
            return v = prod (m, v);
        }

        template<class V, class M, class C>
        V &
        tsv (V &v, const M &m, C) {
            return v = solve (m, v, C ());
        }

        template<class V1, class T1, class T2, class M, class V2>
        V1 &
        gmv (V1 &v1, const T1 &t1, const T2 &t2, const M &m, const V2 &v2) {
            return v1 = t1 * v1 + t2 * prod (m, v2);
        }

        template<class M, class T, class V1, class V2>
        M &
        gr (M &m, const T &t, const V1 &v1, const V2 &v2) {
#ifdef BOOST_UBLAS_USE_ET
            return m += t * outer_prod (v1, v2);
#else
            return m = m + t * outer_prod (v1, v2);
#endif
        }

        template<class M, class T, class V>
        M &
        sr (M &m, const T &t, const V &v) {
#ifdef BOOST_UBLAS_USE_ET
            return m += t * outer_prod (v, v);
#else
            return m = m + t * outer_prod (v, v);
#endif
        }
        template<class M, class T, class V>
        M &
        hr (M &m, const T &t, const V &v) {
#ifdef BOOST_UBLAS_USE_ET
            return m += t * outer_prod (v, conj (v));
#else
            return m = m + t * outer_prod (v, conj (v));
#endif
        }

        template<class M, class T, class V1, class V2>
        M &
        sr2 (M &m, const T &t, const V1 &v1, const V2 &v2) {
#ifdef BOOST_UBLAS_USE_ET
            return m += t * (outer_prod (v1, v2) + outer_prod (v2, v1));
#else
            return m = m + t * (outer_prod (v1, v2) + outer_prod (v2, v1));
#endif
        }
        template<class M, class T, class V1, class V2>
        M &
        hr2 (M &m, const T &t, const V1 &v1, const V2 &v2) {
#ifdef BOOST_UBLAS_USE_ET
            return m += t * outer_prod (v1, conj (v2)) + type_traits<T>::conj (t) * outer_prod (v2, conj (v1));
#else
            return m = m + t * outer_prod (v1, conj (v2)) + type_traits<T>::conj (t) * outer_prod (v2, conj (v1));
#endif
        }

    }

    namespace blas_3 {

        template<class M1, class T, class M2, class M3>
        M1 &
        tmm (M1 &m1, const T &t, const M2 &m2, const M3 &m3) {
            return m1 = t * prod (m2, m3);
        }

        template<class M1, class T, class M2, class C>
        M1 &
        tsm (M1 &m1, const T &t, const M2 &m2, C) {
            return m1 = solve (m2, t * m1, C ());
        }

        template<class M1, class T1, class T2, class M2, class M3>
        M1 &
        gmm (M1 &m1, const T1 &t1, const T2 &t2, const M2 &m2, const M3 &m3) {
            return m1 = t1 * m1 + t2 * prod (m2, m3);
        }

        template<class M1, class T1, class T2, class M2>
        M1 &
        srk (M1 &m1, const T1 &t1, const T2 &t2, const M2 &m2) {
            return m1 = t1 * m1 + t2 * prod (m2, trans (m2));
        }
        template<class M1, class T1, class T2, class M2>
        M1 &
        hrk (M1 &m1, const T1 &t1, const T2 &t2, const M2 &m2) {
            return m1 = t1 * m1 + t2 * prod (m2, herm (m2));
        }

        template<class M1, class T1, class T2, class M2, class M3>
        M1 &
        sr2k (M1 &m1, const T1 &t1, const T2 &t2, const M2 &m2, const M3 &m3) {
            return m1 = t1 * m1 + t2 * (prod (m2, trans (m3)) + prod (m3, trans (m2)));
        }
        template<class M1, class T1, class T2, class M2, class M3>
        M1 &
        hr2k (M1 &m1, const T1 &t1, const T2 &t2, const M2 &m2, const M3 &m3) {
            return m1 = t1 * m1 + t2 * prod (m2, herm (m3)) + type_traits<T2>::conj (t2) * prod (m3, herm (m2));
        }

    }

}}}

#endif