38a54df863
People keep tripping over the old copyrights and copy-pasting them to new files. Search and replace "Cloudius Systems" with "ScyllaDB". Message-Id: <1460013664-25966-1-git-send-email-penberg@scylladb.com>
48 lines
1.5 KiB
C++
48 lines
1.5 KiB
C++
/*
|
|
* Copyright (C) 2015 ScyllaDB
|
|
*/
|
|
|
|
/*
|
|
* This file is part of Scylla.
|
|
*
|
|
* Scylla is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU Affero General Public License as published by
|
|
* the Free Software Foundation, either version 3 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* Scylla 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 General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with Scylla. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include "large_bitset.hh"
|
|
#include <algorithm>
|
|
#include <seastar/core/align.hh>
|
|
|
|
large_bitset::large_bitset(size_t nr_bits) : _nr_bits(nr_bits) {
|
|
auto nr_blocks = align_up(nr_bits, bits_per_block()) / bits_per_block();
|
|
_storage.reserve(nr_blocks);
|
|
size_t nr_ints = align_up(nr_bits, bits_per_int()) / bits_per_int();
|
|
while (nr_ints) {
|
|
auto now = std::min(ints_per_block(), nr_ints);
|
|
_storage.push_back(std::make_unique<int_type[]>(now));
|
|
std::fill_n(_storage.back().get(), now, 0);
|
|
nr_ints -= now;
|
|
}
|
|
}
|
|
|
|
void
|
|
large_bitset::clear() {
|
|
size_t nr_ints = align_up(_nr_bits, bits_per_int()) / bits_per_int();
|
|
auto bp = _storage.begin();
|
|
while (nr_ints) {
|
|
auto now = std::min(ints_per_block(), nr_ints);
|
|
std::fill_n(bp++->get(), now, 0);
|
|
nr_ints -= now;
|
|
}
|
|
}
|