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//
// Copyright Aliaksei Levin (levlam@telegram.org), Arseny Smirnov (arseny30@gmail.com) 2014-2023
//
// 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_mutable_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_mutable_slice(UInt<size> &value) {
return value.as_mutable_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
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