97 lines
2.1 KiB
C++
97 lines
2.1 KiB
C++
/***
|
|
Copyright (C) 2022 J Reece Wilson (a/k/a "Reece"). All rights reserved.
|
|
|
|
File: auNumberUtils.hpp
|
|
Date: 2022-2-1
|
|
Author: Reece
|
|
***/
|
|
#pragma once
|
|
|
|
template <typename A, typename B, typename Ret_t =
|
|
AuConditional_t<AuIsClass_v<A>, A, AuCommonType_t<A, B>>>
|
|
constexpr Ret_t AuMin(const A &a, const B &b)
|
|
{
|
|
return a < b ? a : b;
|
|
}
|
|
|
|
template <typename A, typename B, typename Ret_t =
|
|
AuConditional_t<AuIsClass_v<A>, A, AuCommonType_t<A, B>>>
|
|
constexpr Ret_t AuMax(const A &a, const B &b)
|
|
{
|
|
return a < b ? b : a;
|
|
}
|
|
|
|
template <class T>
|
|
constexpr const T AuConstPow(const T base, const AuUInt8 exponent)
|
|
{
|
|
return exponent ? base * AuConstPow(base, exponent - 1) : 1;
|
|
}
|
|
|
|
template <class T>
|
|
constexpr const T AuPageRoundUp(const T value, const T pageSize)
|
|
{
|
|
return (value + (pageSize - 1)) & ~(pageSize - 1);
|
|
}
|
|
|
|
template <class T>
|
|
constexpr const T AuPageRound(const T value, const T pageSize)
|
|
{
|
|
return value & ~(pageSize - 1);
|
|
}
|
|
|
|
// TODO: out of order
|
|
#include "auBitsUtils.hpp"
|
|
|
|
template <class T>
|
|
const bool AuIsPow2(const T value)
|
|
{
|
|
return (value) && (value & (value - 1) == 0);
|
|
}
|
|
|
|
template <class T>
|
|
const T AuNextPow2(const T value)
|
|
{
|
|
if constexpr (AuIsSame_v<T, AuUInt16> ||
|
|
AuIsSame_v<T, AuUInt8>)
|
|
{
|
|
return AuNextPow2<AuUInt32>(value);
|
|
}
|
|
else
|
|
{
|
|
AuUInt8 ret;
|
|
AuBitScanReverse(ret, value);
|
|
return T(1) << (T(ret) + T(1));
|
|
}
|
|
}
|
|
|
|
template <class T>
|
|
const T AuRoundUpPow2(const T value)
|
|
{
|
|
if constexpr (AuIsSame_v<T, AuUInt16> ||
|
|
AuIsSame_v<T, AuUInt8>)
|
|
{
|
|
return AuRoundUpPow2<AuUInt32>(value);
|
|
}
|
|
else
|
|
{
|
|
AuUInt8 ret;
|
|
AuBitScanReverse(ret, value);
|
|
return T(1) << (T(ret) + T(T(1) << T(ret) == value ? 0 : 1));
|
|
}
|
|
}
|
|
|
|
template <class T>
|
|
const T AuRoundDownPow2(const T value)
|
|
{
|
|
if constexpr (AuIsSame_v<T, AuUInt16> ||
|
|
AuIsSame_v<T, AuUInt8>)
|
|
{
|
|
return AuRoundDownPow2<AuUInt32>(value);
|
|
}
|
|
else
|
|
{
|
|
AuUInt8 ret;
|
|
AuBitScanReverse(ret, value);
|
|
return T(1) << T(ret);
|
|
}
|
|
} |