/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4; fill-column: 100 -*- */

/*

 * This file is part of the LibreOffice project.

 *

 * This Source Code Form is subject to the terms of the Mozilla Public

 * License, v. 2.0. If a copy of the MPL was not distributed with this

 * file, You can obtain one at http://mozilla.org/MPL/2.0/.

 */

#pragma once

#include <sal/config.h>

#include <basegfx/numeric/ftools.hxx>

#include <sal/types.h>

#include <o3tl/strong_int.hxx>

#include <o3tl/unit_conversion.hxx>

#include <cstdlib>

#include <numeric>

template <int N> struct FractionTag;

// 1/Nth fraction of a degree

template <typename I, int N> using Degree = o3tl::strong_int<I, FractionTag<N>>;

template <typename I, int N> char (&NofDegree(Degree<I, N>))[N]; // helper

// Nof<DegreeN> gives compile-time constant N, needed in templates

template <class D> constexpr int Nof = sizeof(NofDegree(std::declval<D>()));

/** tenths of a Degree, normally rotation */

typedef Degree<sal_Int16, 10> Degree10;

/** custom literal */

constexpr Degree10 operator""_deg10(unsigned long long n) { return Degree10{ n }; }

/** hundredths of a Degree, normally rotation */

typedef Degree<sal_Int32, 100> Degree100;

// Android has trouble calling the correct overload of std::abs

#ifdef ANDROID

inline Degree100 abs(Degree100 x) { return Degree100(std::abs(static_cast<int>(x.get()))); }

#else

inline Degree100 abs(Degree100 x) { return Degree100(std::abs(x.get())); }

#endif

/** custom literal */

constexpr Degree100 operator""_deg100(unsigned long long n) { return Degree100{ n }; }

/** conversion functions */

template <class To, typename IofFrom, int NofFrom> inline To to(Degree<IofFrom, NofFrom> x)

{

    constexpr sal_Int64 m = Nof<To> / std::gcd(Nof<To>, NofFrom);

    constexpr sal_Int64 d = NofFrom / std::gcd(Nof<To>, NofFrom);

    return To{ o3tl::convert(x.get(), m, d) };

}

o3tl::strong_int<short, FractionTag<10> > to<o3tl::strong_int<short, FractionTag<10> >, int, 100>(o3tl::strong_int<int, FractionTag<100> >)

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{

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    constexpr sal_Int64 m = Nof<To> / std::gcd(Nof<To>, NofFrom);

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    constexpr sal_Int64 d = NofFrom / std::gcd(Nof<To>, NofFrom);

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    return To{ o3tl::convert(x.get(), m, d) };

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}

Unexecuted instantiation: o3tl::strong_int<int, FractionTag<100> > to<o3tl::strong_int<int, FractionTag<100> >, short, 10>(o3tl::strong_int<short, FractionTag<10> >)

template <class D> inline double toRadians(D x) { return basegfx::deg2rad<Nof<D>>(x.get()); }

double toRadians<o3tl::strong_int<short, FractionTag<10> > >(o3tl::strong_int<short, FractionTag<10> >)

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template <class D> inline double toRadians(D x) { return basegfx::deg2rad<Nof<D>>(x.get()); }

double toRadians<o3tl::strong_int<int, FractionTag<100> > >(o3tl::strong_int<int, FractionTag<100> >)

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template <class D> inline double toRadians(D x) { return basegfx::deg2rad<Nof<D>>(x.get()); }

template <class D> inline double toDegrees(D x) { return x.get() / static_cast<double>(Nof<D>); }

Unexecuted instantiation: double toDegrees<o3tl::strong_int<short, FractionTag<10> > >(o3tl::strong_int<short, FractionTag<10> >)

double toDegrees<o3tl::strong_int<int, FractionTag<100> > >(o3tl::strong_int<int, FractionTag<100> >)

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template <class D> inline double toDegrees(D x) { return x.get() / static_cast<double>(Nof<D>); }

/* vim:set shiftwidth=4 softtabstop=4 expandtab cinoptions=b1,g0,N-s cinkeys+=0=break: */