qd.h (flens/hacks/qd.h)

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/*
*   Copyright (c) 2011, Michael Lehn
*
*   All rights reserved.
*
*   Redistribution and use in source and binary forms, with or without
*   modification, are permitted provided that the following conditions
*   are met:
*
*   1) Redistributions of source code must retain the above copyright
*      notice, this list of conditions and the following disclaimer.
*   2) Redistributions in binary form must reproduce the above copyright
*      notice, this list of conditions and the following disclaimer in
*      the documentation and/or other materials provided with the
*      distribution.
*   3) Neither the name of the FLENS development group nor the names of
*      its contributors may be used to endorse or promote products derived
*      from this software without specific prior written permission.
*
*   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
*   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
*   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
*   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
*   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
*   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
*   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
*   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
*   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
*   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
*   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/

#if defined(QD_API) && !defined(FLENS_HACKS_QD_H)
#define FLENS_HACKS_QD_H 1

#include <flens/auxiliary/explicit_cast.h>

namespace std {

//
// signbit
// TODO: At the moment this functions returns signbit(x[0]).  We have
//       to figure out how we actually get the signbit ...
//

int
signbit(const dd_real &x);

int
signbit(const qd_real &x);

} // namespace std

namespace flens {

//
// dd_real explicit_cast
//

template <>
    int
    explicit_cast(const dd_real &from);

template <>
    double
    explicit_cast(const dd_real &from);

//
// qd_real explicit_cast
//

template <>
    int
    explicit_cast(const qd_real &from);

template <>
    double
    explicit_cast(const qd_real &from);

template <>
    dd_real
    explicit_cast(const qd_real &from);

} // namespace flens

#endif // defined(QD_API) && !defined(FLENS_HACKS_QD_H)