forked from openkylin/vc
74 lines
2.6 KiB
C++
74 lines
2.6 KiB
C++
/* This file is part of the Vc library. {{{
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Copyright © 2016 Matthias Kretz <kretz@kde.org>
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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* Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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* Neither the names of contributing organizations nor the
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names of its contributors may be used to endorse or promote products
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derived from this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE FOR ANY
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DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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}}}*/
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#include <limits>
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#include <type_traits>
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template <typename T, typename F>
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inline typename std::enable_if<std::is_floating_point<T>::value>::type
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iterateNumericRange(F &&f)
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{
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using L = std::numeric_limits<T>;
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constexpr int nsteps = 17;
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const T step = L::max() / nsteps;
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for (int i = 0; i < nsteps; ++i) {
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f(T(L::lowest() + i * step));
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}
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for (int i = 0; i < nsteps; ++i) {
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f(T(L::max() - i * step));
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}
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f(T(-1));
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f(-L::min());
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f(-L::denorm_min());
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f(T(0));
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f(L::denorm_min());
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f(L::min());
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f(T(1));
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}
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template <typename T, typename F>
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inline typename std::enable_if<std::is_integral<T>::value>::type iterateNumericRange(
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F &&f)
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{
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using L = std::numeric_limits<T>;
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constexpr int nsteps = 17;
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const T step = L::max() / nsteps;
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for (int i = 0; i < nsteps; ++i) {
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f(T(L::max() - i * step));
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}
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f(T(1));
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f(T(0));
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if (std::is_signed<T>::value) {
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f(T(-1));
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for (int i = 0; i < nsteps; ++i) {
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f(T(L::min() + i * step));
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}
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}
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}
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// vim: foldmethod=marker
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