// // Copyright Aliaksei Levin (levlam@telegram.org), Arseny Smirnov (arseny30@gmail.com) 2014-2022 // // Distributed under the Boost Software License, Version 1.0. (See accompanying // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) // #pragma once #include "td/utils/common.h" #include "td/utils/Slice.h" namespace td { template <size_t size> struct UInt { static_assert(size % 8 == 0, "size should be divisible by 8"); uint8 raw[size / 8]; Slice as_slice() const { return Slice(raw, size / 8); } MutableSlice as_slice() { return MutableSlice(raw, size / 8); } bool is_zero() const { for (size_t i = 0; i < size / 8; i++) { if (raw[i] != 0) { return false; } } return true; } void set_zero() { for (size_t i = 0; i < size / 8; i++) { raw[i] = 0; } } static UInt zero() { UInt v; v.set_zero(); return v; } }; template <size_t size> bool operator==(const UInt<size> &a, const UInt<size> &b) { return a.as_slice() == b.as_slice(); } template <size_t size> bool operator!=(const UInt<size> &a, const UInt<size> &b) { return !(a == b); } template <size_t size> UInt<size> operator^(const UInt<size> &a, const UInt<size> &b) { UInt<size> res; for (size_t i = 0; i < size / 8; i++) { res.raw[i] = static_cast<uint8>(a.raw[i] ^ b.raw[i]); } return res; } template <size_t size> int get_kth_bit(const UInt<size> &a, uint32 bit) { uint8 b = a.raw[bit / 8]; bit &= 7; return (b >> (7 - bit)) & 1; } template <size_t size> Slice as_slice(const UInt<size> &value) { return value.as_slice(); } template <size_t size> MutableSlice as_slice(UInt<size> &value) { return value.as_slice(); } template <size_t size> bool operator<(const UInt<size> &a, const UInt<size> &b) { return a.as_slice() < b.as_slice(); } using UInt128 = UInt<128>; using UInt256 = UInt<256>; } // namespace td