kc3-lang/angle/src/common/third_party/base/anglebase/numerics/ranges.h

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• Hash : ce6f9c8f
  Author :
  Date : 2021-11-19T14:52:48
  

  Update checked numerics library.
  
  This library hadn't been updated in quite some time and had bugs
  which affected UBSAN in some operators.
  
  Bug: angleproject:5795
  Change-Id: I40f658655034ce03df29cf4c71acb3f6fe96bef0
  Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/3289941
  Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org>
  Commit-Queue: Jamie Madill <jmadill@chromium.org>
  

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• src/common/third_party/base/anglebase/numerics/ranges.h

• // Copyright 2017 The Chromium Authors. All rights reserved.
  // Use of this source code is governed by a BSD-style license that can be
  // found in the LICENSE file.
  
  #ifndef BASE_NUMERICS_RANGES_H_
  #define BASE_NUMERICS_RANGES_H_
  
  #include <algorithm>
  #include <cmath>
  
  namespace base
  {
  
  // DO NOT USE THIS FUNCTION. IT IS DUE TO BE REMOVED. https://crbug.com/1231569
  // Please use base::clamp() from base/cxx17_backports.h instead.
  //
  // This function, unlike base::clamp(), does not check if `min` is greater than
  // `max`, and returns a bogus answer if it is. Please migrate all code that
  // calls this function to use base::clamp() instead.
  //
  // If, for some reason the broken behavior is required, please re-create this
  // min/max nesting inline in the host code and explain with a comment why it
  // is needed.
  template <class T>
  constexpr const T &BrokenClampThatShouldNotBeUsed(const T &value, const T &min, const T &max)
  {
      return std::min(std::max(value, min), max);
  }
  
  template <typename T>
  constexpr bool IsApproximatelyEqual(T lhs, T rhs, T tolerance)
  {
      static_assert(std::is_arithmetic<T>::value, "Argument must be arithmetic");
      return std::abs(rhs - lhs) <= tolerance;
  }
  
  }  // namespace base
  
  #endif  // BASE_NUMERICS_RANGES_H_
  

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