123 lines
3.2 KiB
C++
123 lines
3.2 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 2010-2016 Danny Robson <danny@nerdcruft.net>
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*/
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#include "extent.hpp"
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#include "debug.hpp"
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#include "maths.hpp"
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#include <algorithm>
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#include <numeric>
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using util::extent;
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///////////////////////////////////////////////////////////////////////////////
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template <size_t S, typename T>
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extent<S,T>::extent (vector<S,T> _v)
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{
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std::transform (std::begin (_v),
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std::end (_v),
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this->begin (),
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[] (auto i) {
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// using std::abs gives unsigned abs warnings under clang. this tricks
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// it sufficiently to quiet the warnings.
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return i < 0 ? -i : i;
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});
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}
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///////////////////////////////////////////////////////////////////////////////
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template <size_t S, typename T>
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extent<S,T>
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extent<S,T>::expanded (util::vector<S,T> mag) const
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{
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return *this + mag;
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}
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//-----------------------------------------------------------------------------
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template <size_t S, typename T>
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extent<S,T>
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extent<S,T>::expanded (T t) const
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{
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return *this + util::vector<S,T> {t};
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}
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//-----------------------------------------------------------------------------
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template <size_t S, typename T>
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extent<S,T>
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extent<S,T>::contracted (vector<S,T> t) const
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{
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return *this - t;
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}
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//-----------------------------------------------------------------------------
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template <size_t S, typename T>
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extent<S,T>
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extent<S,T>::contracted (T t) const
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{
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return *this - vector<S,T> {t};
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}
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///////////////////////////////////////////////////////////////////////////////
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template <size_t S, typename T>
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bool
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extent<S,T>::empty (void) const
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{
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return almost_zero (area());
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}
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///////////////////////////////////////////////////////////////////////////////
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namespace util::debug {
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template <size_t S, typename T>
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struct validator<extent<S,T>> {
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static bool is_valid (const extent<S,T> &e)
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{
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return std::all_of (std::begin (e.data),
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std::end (e.data),
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[] (auto i) { return i >= 0; });
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}
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};
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}
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//-----------------------------------------------------------------------------
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#define INSTANTIATE_S_T(S,T) \
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template struct ::util::extent<S,T>; \
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template bool ::util::debug::is_valid (const ::util::extent<S,T>&); \
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template struct ::util::debug::validator<::util::extent<S,T>>;
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#define INSTANTIATE(T) \
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INSTANTIATE_S_T(1,T) \
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INSTANTIATE_S_T(2,T) \
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INSTANTIATE_S_T(3,T)
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INSTANTIATE( int16_t)
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INSTANTIATE( int32_t)
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INSTANTIATE( int64_t)
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INSTANTIATE(uint16_t)
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INSTANTIATE(uint32_t)
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INSTANTIATE(uint64_t)
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INSTANTIATE(float)
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INSTANTIATE(double)
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