be99101f36
sprint() recently became more strict, throwing on sprint("%s", 5). Replace
with the more modern format().
Mechanically converted with https://github.com/avikivity/unsprint.
54 lines
1.7 KiB
C++
54 lines
1.7 KiB
C++
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/*
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* Copyright (C) 2015 ScyllaDB
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*/
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/*
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* This file is part of Scylla.
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*
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* Scylla is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* Scylla is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with Scylla. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "log.hh"
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#include "bloom_filter.hh"
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#include "bloom_calculations.hh"
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#include <seastar/core/thread.hh>
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namespace utils {
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static logging::logger filterlog("bloom_filter");
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filter_ptr i_filter::get_filter(int64_t num_elements, double max_false_pos_probability, filter_format fformat) {
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assert(seastar::thread::running_in_thread());
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if (max_false_pos_probability > 1.0) {
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throw std::invalid_argument(format("Invalid probability {:f}: must be lower than 1.0", max_false_pos_probability));
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}
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if (max_false_pos_probability == 1.0) {
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return std::make_unique<filter::always_present_filter>();
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}
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int buckets_per_element = bloom_calculations::max_buckets_per_element(num_elements);
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auto spec = bloom_calculations::compute_bloom_spec(buckets_per_element, max_false_pos_probability);
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return filter::create_filter(spec.K, num_elements, spec.buckets_per_element, fformat);
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}
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hashed_key make_hashed_key(bytes_view b) {
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std::array<uint64_t, 2> h;
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utils::murmur_hash::hash3_x64_128(b, 0, h);
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return { h };
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}
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}
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