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Added template parameter clamp functions

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This commit is contained in:
John Wellbelove 2024-05-28 11:58:07 +01:00
parent 1908ab5b57
commit bbfce66abc
2 changed files with 54 additions and 4 deletions
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22
include/etl/algorithm.h
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@ -2142,19 +2142,33 @@ namespace etl
///\ingroup algorithm
//***************************************************************************
template<typename T, typename TCompare>
ETL_CONSTEXPR
const T& clamp(const T& value, const T& low, const T& high, TCompare compare)
ETL_CONSTEXPR
T clamp(const T& value, const T& low, const T& high, TCompare compare)
{
return compare(value, low) ? low : compare(high, value) ? high : value;
}
template <typename T>
ETL_CONSTEXPR
const T& clamp(const T& value, const T& low, const T& high )
ETL_CONSTEXPR
T clamp(const T& value, const T& low, const T& high)
{
return clamp(value, low, high, etl::less<T>());
}
template<typename T, T Low, T High, typename TCompare>
ETL_CONSTEXPR
T clamp(const T& value, TCompare compare)
{
return compare(value, Low) ? Low : compare(High, value) ? High : value;
}
template <typename T, T Low, T High>
ETL_CONSTEXPR
T clamp(const T& value)
{
return clamp<T, Low, High>(value, etl::less<T>());
}
//***************************************************************************
/// Remove
///\ingroup algorithm

36
test/test_algorithm.cpp
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@ -2384,5 +2384,41 @@ namespace
data = initial;
}
}
//*************************************************************************
TEST(clamp_run_time)
{
CHECK_EQUAL(5, etl::clamp(5, 0, 10));
CHECK_EQUAL(0, etl::clamp(-5, 0, 10));
CHECK_EQUAL(10, etl::clamp(15, 0, 10));
}
//*************************************************************************
TEST(clamp_compile_time)
{
CHECK_EQUAL(5, (etl::clamp<int, 0, 10>(5)));
CHECK_EQUAL(0, (etl::clamp<int, 0, 10>(-5)));
CHECK_EQUAL(10, (etl::clamp<int, 0, 10>(15)));
}
//*************************************************************************
TEST(clamp_constexpr)
{
constexpr int result1 = etl::clamp(5, 0, 10);
constexpr int result2 = etl::clamp(-5, 0, 10);
constexpr int result3 = etl::clamp(15, 0, 10);
constexpr int result4 = etl::clamp<int, 0, 10>(5);
constexpr int result5 = etl::clamp<int, 0, 10>(-5);
constexpr int result6 = etl::clamp<int, 0, 10>(15);
CHECK_EQUAL(5, result1);
CHECK_EQUAL(0, result2);
CHECK_EQUAL(10, result3);
CHECK_EQUAL(5, result4);
CHECK_EQUAL(0, result5);
CHECK_EQUAL(10, result6);
}
};
}