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Convert clamp() helper to backport of std::clamp() (#3010)

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Oxan van Leeuwen 2022-01-06 12:56:10 +01:00 committed by GitHub
parent a4931f5d78
commit 5c339d4597
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2 changed files with 12 additions and 20 deletions
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11
esphome/core/helpers.cpp
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@ -215,17 +215,6 @@ void HighFrequencyLoopRequester::stop() {
}
bool HighFrequencyLoopRequester::is_high_frequency() { return high_freq_num_requests > 0; }
template<typename T> T clamp(const T val, const T min, const T max) {
if (val < min)
return min;
if (val > max)
return max;
return val;
}
template uint8_t clamp(uint8_t, uint8_t, uint8_t);
template float clamp(float, float, float);
template int clamp(int, int, int);
float lerp(float completion, float start, float end) { return start + (end - start) * completion; }
bool str_startswith(const std::string &full, const std::string &start) { return full.rfind(start, 0) == 0; }

21
esphome/core/helpers.h
View File

@ -58,15 +58,6 @@ class HighFrequencyLoopRequester {
bool started_{false};
};
/** Clamp the value between min and max.
*
* @param val The value.
* @param min The minimum value.
* @param max The maximum value.
* @return val clamped in between min and max.
*/
template<typename T> T clamp(T val, T min, T max);
/** Linearly interpolate between end start and end by completion.
*
* @tparam T The input/output typename.
@ -277,6 +268,18 @@ using std::is_trivially_copyable;
template<typename T> struct is_trivially_copyable : public std::integral_constant<bool, true> {};
#endif
// std::clamp from C++17
#if __cpp_lib_clamp >= 201603
using std::clamp;
#else
template<typename T, typename Compare> constexpr const T &clamp(const T &v, const T &lo, const T &hi, Compare comp) {
return comp(v, lo) ? lo : comp(hi, v) ? hi : v;
}
template<typename T> constexpr const T &clamp(const T &v, const T &lo, const T &hi) {
return clamp(v, lo, hi, std::less<T>{});
}
#endif
// std::bit_cast from C++20
#if __cpp_lib_bit_cast >= 201806
using std::bit_cast;