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feat: upgrade session keys to use mersenne twister (#1155)

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* upgrade session keys to use mersenne twister

* arithmetic type static assert and windows min/max macro undef
This commit is contained in:
avery
2023-07-23 14:59:43 -07:00
committed by GitHub
parent c791d1a237
commit bd5ead40f6
3 changed files with 43 additions and 24 deletions
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61
dCommon/GeneralUtils.h
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@@ -111,29 +111,6 @@ namespace GeneralUtils {
*/
bool CheckBit(int64_t value, uint32_t index);
// MARK: Random Number Generation
//! Generates a random number
/*!
\param min The minimum the generate from
\param max The maximum to generate to
*/
template <typename T>
inline T GenerateRandomNumber(std::size_t min, std::size_t max) {
// Make sure it is a numeric type
static_assert(std::is_arithmetic<T>::value, "Not an arithmetic type");
if constexpr (std::is_integral_v<T>) { // constexpr only necessary on first statement
std::uniform_int_distribution<T> distribution(min, max);
return distribution(Game::randomEngine);
} else if (std::is_floating_point_v<T>) {
std::uniform_real_distribution<T> distribution(min, max);
return distribution(Game::randomEngine);
}
return T();
}
bool ReplaceInString(std::string& str, const std::string& from, const std::string& to);
std::u16string ReadWString(RakNet::BitStream* inStream);
@@ -223,4 +200,42 @@ namespace GeneralUtils {
std::hash<T> h;
s ^= h(v) + 0x9e3779b9 + (s << 6) + (s >> 2);
}
// MARK: Random Number Generation
//! Generates a random number
/*!
\param min The minimum the generate from
\param max The maximum to generate to
*/
template <typename T>
inline T GenerateRandomNumber(std::size_t min, std::size_t max) {
// Make sure it is a numeric type
static_assert(std::is_arithmetic<T>::value, "Not an arithmetic type");
if constexpr (std::is_integral_v<T>) { // constexpr only necessary on first statement
std::uniform_int_distribution<T> distribution(min, max);
return distribution(Game::randomEngine);
} else if (std::is_floating_point_v<T>) {
std::uniform_real_distribution<T> distribution(min, max);
return distribution(Game::randomEngine);
}
return T();
}
// on Windows we need to undef these or else they conflict with our numeric limits calls
// DEVELOPERS DEVELOPERS DEVELOPERS DEVELOPERS DEVELOPERS DEVELOPERS DEVELOPERS DEVELOPERS
#ifdef _WIN32
#undef min
#undef max
#endif
template <typename T>
inline T GenerateRandomNumber() {
// Make sure it is a numeric type
static_assert(std::is_arithmetic<T>::value, "Not an arithmetic type");
return GenerateRandomNumber<T>(std::numeric_limits<T>::min(), std::numeric_limits<T>::max());
}
}