mirror of https://github.com/bsnes-emu/bsnes.git
62 lines
1.5 KiB
C++
62 lines
1.5 KiB
C++
#pragma once
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namespace nall {
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template<typename T, enable_if_t<is_unsigned<T>::value>>
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inline auto upper(T value) -> T {
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return value >> sizeof(T) * 4;
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}
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template<typename T, enable_if_t<is_unsigned<T>::value>>
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inline auto lower(T value) -> T {
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static const T Mask = ~T(0) >> sizeof(T) * 4;
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return value & Mask;
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}
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template<typename T, typename U, enable_if_t<is_unsigned<T>::value>, enable_if_t<is_unsigned<U>::value>>
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inline auto mul(T lhs, U rhs) -> uintmax {
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return lhs * rhs;
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}
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template<typename T, enable_if_t<is_unsigned<T>::value>>
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inline auto square(T value) -> uintmax {
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return value * value;
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}
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template<typename T, typename U>
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inline auto rol(T lhs, U rhs, enable_if_t<is_unsigned<T>::value>* = 0) -> T {
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return lhs << rhs | lhs >> sizeof(T) * 8 - rhs;
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}
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template<typename T, typename U>
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inline auto ror(T lhs, U rhs, enable_if_t<is_unsigned<T>::value>* = 0) -> T {
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return lhs >> rhs | lhs << sizeof(T) * 8 - rhs;
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}
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#if INTMAX_BITS >= 128
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inline auto operator"" _u128(const char* s) -> uint128_t {
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uint128_t p = 0;
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if(s[0] == '0' && (s[1] == 'x' || s[1] == 'X')) {
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s += 2;
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while(*s) {
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auto c = *s++;
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if(c == '\'');
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else if(c >= '0' && c <= '9') p = (p << 4) + (c - '0');
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else if(c >= 'a' && c <= 'f') p = (p << 4) + (c - 'a' + 10);
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else if(c >= 'A' && c <= 'F') p = (p << 4) + (c - 'A' + 10);
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else break;
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}
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} else {
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while(*s) {
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auto c = *s++;
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if(c == '\'');
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else if(c >= '0' && c <= '9') p = (p << 3) + (p << 1) + (c - '0');
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else break;
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}
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}
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return p;
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}
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#endif
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}
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