79 lines
2.0 KiB
C++
79 lines
2.0 KiB
C++
/*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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* Copyright 2010-2015 Danny Robson <danny@nerdcruft.net>
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*/
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#ifdef __UTIL_RANGE_IPP
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#error
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#else
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#define __UTIL_RANGE_IPP
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#endif
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#include <limits>
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#include <type_traits>
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//-----------------------------------------------------------------------------
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template <typename T>
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template <typename U>
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U
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util::range<T>::normalise (T val) const
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{
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static_assert (std::is_floating_point<U>::value,
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"normalise isn't implemented for integer types");
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return static_cast<U> (val - lo) /
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static_cast<U> ( hi - lo);
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}
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///////////////////////////////////////////////////////////////////////////////
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template <typename T>
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constexpr
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util::range<T>
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util::range<T>::unlimited (void)
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{
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return {
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std::numeric_limits<T>::has_infinity ? -std::numeric_limits<T>::infinity () :
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std::numeric_limits<T>::lowest (),
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std::numeric_limits<T>::has_infinity ? std::numeric_limits<T>::infinity () :
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std::numeric_limits<T>::max ()
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};
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}
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//-----------------------------------------------------------------------------
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template <typename T>
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constexpr
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util::range<T>
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util::range<T>::max (void)
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{
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return {
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std::numeric_limits<T>::lowest (),
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std::numeric_limits<T>::max ()
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};
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}
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//-----------------------------------------------------------------------------
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template <typename T>
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constexpr
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util::range<T>
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util::range<T>::unit (void)
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{
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return {
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T {0}, T {1}
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};
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}
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