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60 lines
1.7 KiB
C++
60 lines
1.7 KiB
C++
/*
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* sort.cc - C++ sort functions
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* Copyright (C) 2019-2020 Yann Collet
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* GPL v2 License
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program 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 along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* You can contact the author at:
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* - xxHash homepage: https://www.xxhash.com
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* - xxHash source repository: https://github.com/Cyan4973/xxHash
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*/
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/*
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* C++ sort functions tend to run faster than C ones due to templates allowing
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* inline optimizations.
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* Also, glibc's qsort() seems to inflate memory usage, resulting in OOM
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* crashes on the test server.
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*/
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#include <algorithm> // std::sort
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#define XXH_INLINE_ALL // XXH128_cmp
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#include <xxhash.h>
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#include "sort.hh"
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void sort64(uint64_t* table, size_t size)
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{
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std::sort(table, table + size);
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}
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#include <stdlib.h> // qsort
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void sort128(XXH128_hash_t* table, size_t size)
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{
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#if 0
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// C++ sort using a custom function object
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struct {
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bool operator()(XXH128_hash_t a, XXH128_hash_t b) const
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{
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return XXH128_cmp(&a, &b);
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}
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} customLess;
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std::sort(table, table + size, customLess);
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#else
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qsort(table, size, sizeof(*table), XXH128_cmp);
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#endif
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}
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