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arvidn
92 lines
3.2 KiB
C++
92 lines
3.2 KiB
C++
/*
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Copyright (c) 2014-2017, 2019-2020, Arvid Norberg
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Copyright (c) 2016, Alden Torres
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions
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are met:
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* Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in
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the documentation and/or other materials provided with the distribution.
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* Neither the name of the author nor the names of its
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contributors may be used to endorse or promote products derived
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from this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "libtorrent/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 = 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 = 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 = 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 = 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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