algorithm.hpp

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// Copyright (c) 2018 Maikel Nadolski
//
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// of this software and associated documentation files (the "Software"), to deal
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// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
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#ifndef FUB_CORE_ALGORITHM_HPP
#define FUB_CORE_ALGORITHM_HPP
 
#include <cassert>
#include <cstdint>
 
namespace fub {
 
template <class T, class Compare>
constexpr const T& clamp(const T& v, const T& lo, const T& hi, Compare comp) {
  return assert(!comp(hi, lo)), comp(v, lo) ? lo : comp(hi, v) ? hi : v;
}
 
template <class T>
constexpr const T& clamp(const T& v, const T& lo, const T& hi) {
  return clamp(v, lo, hi, std::less<>());
}
 
constexpr std::ptrdiff_t ipow(int base, int exponent) {
  std::ptrdiff_t prod{1};
  while (exponent > 0) {
    prod *= base;
    exponent -= 1;
  }
  return prod;
}
 
} // namespace fub
 
#endif