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https://github.com/arvidn/libtorrent.git
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Arvid Norberg
69 lines
1.9 KiB
C++
69 lines
1.9 KiB
C++
/*
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Copyright (c) 2014-2017, 2020-2021, Arvid Norberg
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Copyright (c) 2016, 2020, Alden Torres
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All rights reserved.
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You may use, distribute and modify this code under the terms of the BSD license,
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see LICENSE file.
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*/
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#include "libtorrent/aux_/crc32c.hpp"
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#include "libtorrent/aux_/cpuid.hpp"
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#include "libtorrent/assert.hpp"
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#include "libtorrent/aux_/byteswap.hpp"
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#include "test.hpp"
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#include "libtorrent/aux_/disable_warnings_push.hpp"
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#include <boost/crc.hpp>
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#include "libtorrent/aux_/disable_warnings_pop.hpp"
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namespace {
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std::uint32_t crc32c_buffer(char const* buf, int const len)
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{
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boost::crc_optimal<32, 0x1EDC6F41, 0xFFFFFFFF, 0xFFFFFFFF, true, true> crc;
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crc.process_block(buf, buf + len);
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return crc.checksum();
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}
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}
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TORRENT_TEST(crc32)
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{
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using namespace lt;
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std::uint32_t out;
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std::uint32_t out2;
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std::uint32_t in1 = aux::host_to_network(0xeffea55a);
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out = aux::crc32c_32(in1);
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TEST_EQUAL(out, 0x5ee3b9d5);
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std::uint64_t buf[4];
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memcpy(buf, "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"
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"\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", 32);
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// https://tools.ietf.org/html/rfc3720#appendix-B.4
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out = aux::crc32c(buf, 4);
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TEST_EQUAL(out, 0x8a9136aaU);
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out2 = crc32c_buffer(reinterpret_cast<char const*>(buf), 32);
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TEST_EQUAL(out, out2);
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memcpy(buf, "\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff"
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"\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff", 32);
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out = aux::crc32c(buf, 4);
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TEST_EQUAL(out, 0x62a8ab43U);
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out2 = crc32c_buffer(reinterpret_cast<char const*>(buf), 32);
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TEST_EQUAL(out, out2);
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memcpy(buf, "\x00\x01\x02\x03\x04\x05\x06\x07\x08\x09\x0a\x0b\x0c\x0d\x0e\x0f"
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"\x10\x11\x12\x13\x14\x15\x16\x17\x18\x19\x1a\x1b\x1c\x1d\x1e\x1f", 32);
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out = aux::crc32c(buf, 4);
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TEST_EQUAL(out, 0x46dd794eU);
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out2 = crc32c_buffer(reinterpret_cast<char const*>(buf), 32);
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TEST_EQUAL(out, out2);
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#if !TORRENT_HAS_ARM
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TORRENT_ASSERT(!aux::arm_crc32c_support);
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#endif
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}
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