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#pragma once
namespace nall {
template<typename T, enable_if_t<is_unsigned<T>::value>>
inline auto upper(T value) -> T {
return value >> sizeof(T) * 4;
}
template<typename T, enable_if_t<is_unsigned<T>::value>>
inline auto lower(T value) -> T {
static const T Mask = ~T(0) >> sizeof(T) * 4;
return value & Mask;
}
template<typename T, typename U, enable_if_t<is_unsigned<T>::value>, enable_if_t<is_unsigned<U>::value>>
inline auto mul(T lhs, U rhs) -> uintmax {
return lhs * rhs;
}
template<typename T, enable_if_t<is_unsigned<T>::value>>
inline auto square(T value) -> uintmax {
return value * value;
}
template<typename T, typename U>
inline auto rol(T lhs, U rhs, enable_if_t<is_unsigned<T>::value>* = 0) -> T {
return lhs << rhs | lhs >> sizeof(T) * 8 - rhs;
}
template<typename T, typename U>
inline auto ror(T lhs, U rhs, enable_if_t<is_unsigned<T>::value>* = 0) -> T {
return lhs >> rhs | lhs << sizeof(T) * 8 - rhs;
}
#if defined(__SIZEOF_INT128__)
inline auto operator"" _u128(const char* s) -> u128 {
u128 p = 0;
if(s[0] == '0' && (s[1] == 'x' || s[1] == 'X')) {
s += 2;
while(*s) {
auto c = *s++;
if(c == '\'');
else if(c >= '0' && c <= '9') p = (p << 4) + (c - '0');
else if(c >= 'a' && c <= 'f') p = (p << 4) + (c - 'a' + 10);
else if(c >= 'A' && c <= 'F') p = (p << 4) + (c - 'A' + 10);
else break;
}
} else {
while(*s) {
auto c = *s++;
if(c == '\'');
else if(c >= '0' && c <= '9') p = (p << 3) + (p << 1) + (c - '0');
else break;
}
}
return p;
}
#endif
}
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