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>
126 lines
5.3 KiB
C++
126 lines
5.3 KiB
C++
/*
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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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#define BOOST_TEST_DYN_LINK
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#define BOOST_TEST_MODULE core
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#include <boost/test/unit_test.hpp>
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#include "utils/murmur_hash.hh"
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#include "bytes.hh"
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#include "core/print.hh"
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static const bytes full_sequence("012345678901234567890123456789012345678901234567890123456789");
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static const uint64_t seed = 0xcafebabe;
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// Below are pre-calculated results of hashing consecutive prefixes of full_sequence using hash3_x64_128(),
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// staring from an empty prefix.
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std::array<uint64_t,2> prefix_hashes[] = {
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{13907055927958326333ULL, 10701141902926764871ULL},
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{16872847325129109440ULL, 5125572542408278394ULL},
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{11916219991241122015ULL, 747256650753853469ULL},
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{1492790099208671403ULL, 16635411534431524239ULL},
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{16764172998150925140ULL, 7440789969466348974ULL},
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{6846275695158209935ULL, 11251493995290334439ULL},
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{1075204625779168927ULL, 3453614304122336174ULL},
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{1404180555660983881ULL, 13684781009779545989ULL},
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{10185829608361057848ULL, 1102754042417891721ULL},
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{12850382803381855486ULL, 7404649381971707328ULL},
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{972515366528881960ULL, 4507841639019527002ULL},
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{9279316204399455969ULL, 9712180353841837616ULL},
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{16558181491899334208ULL, 17507114537353308311ULL},
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{12977947643557220239ULL, 8334539845739718010ULL},
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{3743840537387886281ULL, 15297576726012815871ULL},
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{10675210326497176757ULL, 11200838847539594424ULL},
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{16363715880225337291ULL, 2866762944263215884ULL},
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{1272769995400892137ULL, 1744366104172354624ULL},
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{17426490373034063702ULL, 12666853004117709655ULL},
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{10757142341798556363ULL, 3984810732374497004ULL},
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{4593020710048021108ULL, 14359610319437287264ULL},
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{18212086870806388719ULL, 7490375939640747191ULL},
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{11209001888824275013ULL, 6491913312740217486ULL},
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{17601044365330203914ULL, 1779402119744049378ULL},
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{3916812090790925532ULL, 17533572508631620015ULL},
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{10113761195332211536ULL, 4163484992388084181ULL},
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{4353425943622404193ULL, 1830165015196477722ULL},
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{3904126367597302219ULL, 7917741892387588561ULL},
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{7077450301176172141ULL, 8070185570157969067ULL},
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{6331768922468785771ULL, 9311778359071820659ULL},
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{7715740891587706229ULL, 16510772505395753023ULL},
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{4510384582422222090ULL, 9352450339278885986ULL},
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{6746132289648898302ULL, 15402380546251654069ULL},
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{1315904697672087497ULL, 2686857386486814319ULL},
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{16122226135709041149ULL, 1278536837434550412ULL},
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{6449104926034509627ULL, 8809488279970194649ULL},
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{9047965986959166273ULL, 14963749820458851455ULL},
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{18095596803119563681ULL, 2806499127062067052ULL},
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{545238237267145238ULL, 4583663570136224396ULL},
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{12335897404061220746ULL, 8643308333771385742ULL},
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{15016951849151361171ULL, 13012972687708005422ULL},
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{12896848725136832414ULL, 9881710852371170521ULL},
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{17900663530283054991ULL, 9606960248070178723ULL},
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{4513619521783122834ULL, 4823611535250518791ULL},
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{15572858348470724038ULL, 4882998878774456634ULL},
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{3464540909110937960ULL, 14591983318346304410ULL},
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{2951301498066556278ULL, 3029976006973164807ULL},
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{7848995488883197496ULL, 10621954303326018594ULL},
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{5702723040652442467ULL, 11325339470689059424ULL},
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{870698890980252409ULL, 8294946103885186165ULL},
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{423348447487367835ULL, 4067674294039261619ULL},
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{397951862030142664ULL, 17073640849499096681ULL},
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{9374556141781683538ULL, 10333311062251856416ULL},
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{1097707041202763764ULL, 2870200096551238743ULL},
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{11493051326088411054ULL, 12348796263566330575ULL},
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{15865059192259516415ULL, 4808544582161036476ULL},
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{2717981543414886593ULL, 5944564527643476706ULL},
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{887521262173735642ULL, 3558550013200985442ULL},
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{9496424291456600748ULL, 9845949835154361896ULL},
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{1589012859535948937ULL, 7402826160257180747ULL}
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};
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BOOST_AUTO_TEST_CASE(test_hash_output) {
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auto assert_hashes_equal = [] (bytes_view data, std::array<uint64_t,2> lhs, std::array<uint64_t,2> rhs) {
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if (lhs != rhs) {
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BOOST_FAIL(sprint("Hashes differ for %s (got {0x%x, 0x%x} and {0x%x, 0x%x})", data,
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lhs[0], lhs[1], rhs[0], rhs[1]));
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}
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};
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for (size_t i = 0; i < full_sequence.size(); ++i) {
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auto prefix = bytes_view(full_sequence.begin(), i);
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auto&& expected = prefix_hashes[i];
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{
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std::array<uint64_t, 2> dst;
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utils::murmur_hash::hash3_x64_128(prefix, seed, dst);
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assert_hashes_equal(prefix, dst, expected);
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}
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// Test the iterator version
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{
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std::array<uint64_t,2> dst;
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utils::murmur_hash::hash3_x64_128(prefix.begin(), prefix.size(), seed, dst);
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assert_hashes_equal(prefix, dst, expected);
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}
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}
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}
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