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Place constexpr functions in anonymous namespace (#10651)

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This commit is contained in:
Michał Janiszewski
2020-02-06 08:50:10 +01:00
committed by GitHub
parent 06174adf14
commit 2340206b34
1 changed files with 20 additions and 17 deletions
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37
src/openrct2/common.h
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@@ -51,26 +51,29 @@ const constexpr auto ror32 = ror<uint32_t>;
const constexpr auto rol64 = rol<uint64_t>;
const constexpr auto ror64 = ror<uint64_t>;
constexpr bool is_power_of_2(int v)
namespace
{
return v && ((v & (v - 1)) == 0);
}
[[maybe_unused]] constexpr bool is_power_of_2(int v)
{
return v && ((v & (v - 1)) == 0);
}
// Rounds an integer down to the given power of 2. y must be a power of 2.
constexpr int floor2(const int x, const int y)
{
if (!is_power_of_2(y))
throw std::logic_error("floor2 should only operate on power of 2");
return x & ~(y - 1);
}
// Rounds an integer down to the given power of 2. y must be a power of 2.
[[maybe_unused]] constexpr int floor2(const int x, const int y)
{
if (!is_power_of_2(y))
throw std::logic_error("floor2 should only operate on power of 2");
return x & ~(y - 1);
}
// Rounds an integer up to the given power of 2. y must be a power of 2.
constexpr int ceil2(const int x, const int y)
{
if (!is_power_of_2(y))
throw std::logic_error("ceil2 should only operate on power of 2");
return (x + y - 1) & ~(y - 1);
}
// Rounds an integer up to the given power of 2. y must be a power of 2.
[[maybe_unused]] constexpr int ceil2(const int x, const int y)
{
if (!is_power_of_2(y))
throw std::logic_error("ceil2 should only operate on power of 2");
return (x + y - 1) & ~(y - 1);
}
} // namespace
// Gets the name of a symbol as a C string
#define nameof(symbol) #symbol