mirror of
https://github.com/ton-blockchain/ton
synced 2025-03-09 15:40:10 +00:00
84 lines
2.3 KiB
C++
84 lines
2.3 KiB
C++
/*
|
|
This file is part of TON Blockchain Library.
|
|
|
|
TON Blockchain Library is free software: you can redistribute it and/or modify
|
|
it under the terms of the GNU Lesser General Public License as published by
|
|
the Free Software Foundation, either version 2 of the License, or
|
|
(at your option) any later version.
|
|
|
|
TON Blockchain Library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public License
|
|
along with TON Blockchain Library. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
Copyright 2017-2020 Telegram Systems LLP
|
|
*/
|
|
#pragma once
|
|
|
|
#include "td/utils/bits.h"
|
|
#include "td/utils/int_types.h"
|
|
#include "td/utils/StringBuilder.h"
|
|
|
|
namespace td {
|
|
class StringBuilder;
|
|
}
|
|
|
|
namespace vm {
|
|
namespace detail {
|
|
class LevelMask {
|
|
public:
|
|
explicit LevelMask(td::uint32 new_mask = 0) : mask_(new_mask) {
|
|
}
|
|
td::uint32 get_mask() const {
|
|
return mask_;
|
|
}
|
|
td::uint32 get_level() const {
|
|
return 32 - td::count_leading_zeroes32(mask_);
|
|
}
|
|
td::uint32 get_hash_i() const {
|
|
return td::count_bits32(mask_);
|
|
}
|
|
td::uint32 get_hashes_count() const {
|
|
return get_hash_i() + 1;
|
|
}
|
|
LevelMask apply(td::uint32 level) const {
|
|
DCHECK(level < 32);
|
|
return LevelMask{mask_ & ((1u << level) - 1)};
|
|
}
|
|
LevelMask apply_or(LevelMask other) const {
|
|
return LevelMask{mask_ | other.mask_};
|
|
}
|
|
LevelMask shift_right() const {
|
|
return LevelMask{mask_ >> 1};
|
|
}
|
|
bool is_significant(td::uint32 level) const {
|
|
DCHECK(level < 32);
|
|
bool res = level == 0 || ((mask_ >> (level - 1)) % 2 != 0);
|
|
CHECK(res == (apply(level).get_level() == level));
|
|
return res;
|
|
}
|
|
|
|
bool operator==(const LevelMask& other) const {
|
|
return mask_ == other.mask_;
|
|
}
|
|
bool operator!=(const LevelMask& other) const {
|
|
return !(*this == other);
|
|
}
|
|
|
|
static LevelMask one_level(td::uint32 level) {
|
|
DCHECK(level < 32);
|
|
if (level == 0) {
|
|
return LevelMask(0);
|
|
}
|
|
return LevelMask(1 << (level - 1));
|
|
}
|
|
|
|
private:
|
|
td::uint32 mask_;
|
|
};
|
|
td::StringBuilder& operator<<(td::StringBuilder& sb, LevelMask level_mask);
|
|
} // namespace detail
|
|
} // namespace vm
|