302 lines
10 KiB
C
302 lines
10 KiB
C
/****************************************************************************
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* libc/misc/lib_crc64.c
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*
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* Copyright (C) 2016 Omni Hoverboards Inc. All rights reserved.
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* Author: Paul Alexander Patience <paul-a.patience@polymtl.ca>
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*
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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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*
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* 1. 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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* 2. 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
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* 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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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <sys/types.h>
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#include <stdint.h>
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#include <crc64.h>
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/****************************************************************************
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* Private Data
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****************************************************************************/
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/****************************************************************************
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* CRC64 table generated with:
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*
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* #include <inttypes.h>
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* #include <stdint.h>
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* #include <stdio.h>
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*
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* #define CRC64_POLY ((uint64_t)0x42f0e1eba9ea3693)
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* #define CRC64_TABLEN ((size_t)256)
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*
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* int main(void)
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* {
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* uint64_t crc64val;
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* size_t i;
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* size_t j;
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*
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* printf("static const uint64_t crc64_tab[%zu] =\n", CRC64_TABLEN);
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* printf("{\n ");
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*
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* for (i = 0; i < CRC64_TABLEN; i++)
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* {
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* crc64val = (uint64_t)i << 56;
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* for (j = 0; j < 8; j++)
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* {
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* if ((crc64val & ((uint64_t)1 << 63)) != 0)
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* {
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* crc64val = (crc64val << 1) ^ CRC64_POLY;
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* }
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* else
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* {
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* crc64val = crc64val << 1;
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* }
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* }
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*
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* printf("0x%016"PRIx64, crc64val);
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* if (i + 1 >= CRC64_TABLEN)
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* {
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* printf("\n");
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* }
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* else if (i % 2 == 1)
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* {
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* printf(",\n ");
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* }
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* else
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* {
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* printf(", ");
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* }
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* }
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*
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* printf("};\n");
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* return 0;
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* }
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*
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****************************************************************************/
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#ifdef CONFIG_LIB_CRC64_FAST
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static const uint64_t crc64_tab[256] =
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{
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0x0000000000000000, 0x42f0e1eba9ea3693,
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0x85e1c3d753d46d26, 0xc711223cfa3e5bb5,
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0x493366450e42ecdf, 0x0bc387aea7a8da4c,
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0xccd2a5925d9681f9, 0x8e224479f47cb76a,
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0x9266cc8a1c85d9be, 0xd0962d61b56fef2d,
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0x17870f5d4f51b498, 0x5577eeb6e6bb820b,
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0xdb55aacf12c73561, 0x99a54b24bb2d03f2,
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0x5eb4691841135847, 0x1c4488f3e8f96ed4,
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0x663d78ff90e185ef, 0x24cd9914390bb37c,
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0xe3dcbb28c335e8c9, 0xa12c5ac36adfde5a,
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0x2f0e1eba9ea36930, 0x6dfeff5137495fa3,
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0xaaefdd6dcd770416, 0xe81f3c86649d3285,
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0xf45bb4758c645c51, 0xb6ab559e258e6ac2,
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0x71ba77a2dfb03177, 0x334a9649765a07e4,
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0xbd68d2308226b08e, 0xff9833db2bcc861d,
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0x388911e7d1f2dda8, 0x7a79f00c7818eb3b,
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0xcc7af1ff21c30bde, 0x8e8a101488293d4d,
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0x499b3228721766f8, 0x0b6bd3c3dbfd506b,
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0x854997ba2f81e701, 0xc7b97651866bd192,
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0x00a8546d7c558a27, 0x4258b586d5bfbcb4,
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0x5e1c3d753d46d260, 0x1cecdc9e94ace4f3,
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0xdbfdfea26e92bf46, 0x990d1f49c77889d5,
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0x172f5b3033043ebf, 0x55dfbadb9aee082c,
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0x92ce98e760d05399, 0xd03e790cc93a650a,
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0xaa478900b1228e31, 0xe8b768eb18c8b8a2,
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0x2fa64ad7e2f6e317, 0x6d56ab3c4b1cd584,
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0xe374ef45bf6062ee, 0xa1840eae168a547d,
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0x66952c92ecb40fc8, 0x2465cd79455e395b,
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0x3821458aada7578f, 0x7ad1a461044d611c,
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0xbdc0865dfe733aa9, 0xff3067b657990c3a,
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0x711223cfa3e5bb50, 0x33e2c2240a0f8dc3,
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0xf4f3e018f031d676, 0xb60301f359dbe0e5,
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0xda050215ea6c212f, 0x98f5e3fe438617bc,
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0x5fe4c1c2b9b84c09, 0x1d14202910527a9a,
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0x93366450e42ecdf0, 0xd1c685bb4dc4fb63,
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0x16d7a787b7faa0d6, 0x5427466c1e109645,
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0x4863ce9ff6e9f891, 0x0a932f745f03ce02,
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0xcd820d48a53d95b7, 0x8f72eca30cd7a324,
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0x0150a8daf8ab144e, 0x43a04931514122dd,
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0x84b16b0dab7f7968, 0xc6418ae602954ffb,
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0xbc387aea7a8da4c0, 0xfec89b01d3679253,
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0x39d9b93d2959c9e6, 0x7b2958d680b3ff75,
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0xf50b1caf74cf481f, 0xb7fbfd44dd257e8c,
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0x70eadf78271b2539, 0x321a3e938ef113aa,
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0x2e5eb66066087d7e, 0x6cae578bcfe24bed,
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0xabbf75b735dc1058, 0xe94f945c9c3626cb,
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0x676dd025684a91a1, 0x259d31cec1a0a732,
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0xe28c13f23b9efc87, 0xa07cf2199274ca14,
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0x167ff3eacbaf2af1, 0x548f120162451c62,
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0x939e303d987b47d7, 0xd16ed1d631917144,
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0x5f4c95afc5edc62e, 0x1dbc74446c07f0bd,
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0xdaad56789639ab08, 0x985db7933fd39d9b,
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0x84193f60d72af34f, 0xc6e9de8b7ec0c5dc,
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0x01f8fcb784fe9e69, 0x43081d5c2d14a8fa,
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0xcd2a5925d9681f90, 0x8fdab8ce70822903,
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0x48cb9af28abc72b6, 0x0a3b7b1923564425,
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0x70428b155b4eaf1e, 0x32b26afef2a4998d,
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0xf5a348c2089ac238, 0xb753a929a170f4ab,
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0x3971ed50550c43c1, 0x7b810cbbfce67552,
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0xbc902e8706d82ee7, 0xfe60cf6caf321874,
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0xe224479f47cb76a0, 0xa0d4a674ee214033,
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0x67c58448141f1b86, 0x253565a3bdf52d15,
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0xab1721da49899a7f, 0xe9e7c031e063acec,
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0x2ef6e20d1a5df759, 0x6c0603e6b3b7c1ca,
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0xf6fae5c07d3274cd, 0xb40a042bd4d8425e,
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0x731b26172ee619eb, 0x31ebc7fc870c2f78,
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0xbfc9838573709812, 0xfd39626eda9aae81,
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0x3a28405220a4f534, 0x78d8a1b9894ec3a7,
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0x649c294a61b7ad73, 0x266cc8a1c85d9be0,
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0xe17dea9d3263c055, 0xa38d0b769b89f6c6,
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0x2daf4f0f6ff541ac, 0x6f5faee4c61f773f,
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0xa84e8cd83c212c8a, 0xeabe6d3395cb1a19,
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0x90c79d3fedd3f122, 0xd2377cd44439c7b1,
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0x15265ee8be079c04, 0x57d6bf0317edaa97,
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0xd9f4fb7ae3911dfd, 0x9b041a914a7b2b6e,
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0x5c1538adb04570db, 0x1ee5d94619af4648,
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0x02a151b5f156289c, 0x4051b05e58bc1e0f,
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0x87409262a28245ba, 0xc5b073890b687329,
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0x4b9237f0ff14c443, 0x0962d61b56fef2d0,
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0xce73f427acc0a965, 0x8c8315cc052a9ff6,
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0x3a80143f5cf17f13, 0x7870f5d4f51b4980,
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0xbf61d7e80f251235, 0xfd913603a6cf24a6,
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0x73b3727a52b393cc, 0x31439391fb59a55f,
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0xf652b1ad0167feea, 0xb4a25046a88dc879,
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0xa8e6d8b54074a6ad, 0xea16395ee99e903e,
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0x2d071b6213a0cb8b, 0x6ff7fa89ba4afd18,
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0xe1d5bef04e364a72, 0xa3255f1be7dc7ce1,
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0x64347d271de22754, 0x26c49cccb40811c7,
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0x5cbd6cc0cc10fafc, 0x1e4d8d2b65facc6f,
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0xd95caf179fc497da, 0x9bac4efc362ea149,
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0x158e0a85c2521623, 0x577eeb6e6bb820b0,
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0x906fc95291867b05, 0xd29f28b9386c4d96,
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0xcedba04ad0952342, 0x8c2b41a1797f15d1,
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0x4b3a639d83414e64, 0x09ca82762aab78f7,
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0x87e8c60fded7cf9d, 0xc51827e4773df90e,
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0x020905d88d03a2bb, 0x40f9e43324e99428,
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0x2cffe7d5975e55e2, 0x6e0f063e3eb46371,
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0xa91e2402c48a38c4, 0xebeec5e96d600e57,
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0x65cc8190991cb93d, 0x273c607b30f68fae,
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0xe02d4247cac8d41b, 0xa2dda3ac6322e288,
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0xbe992b5f8bdb8c5c, 0xfc69cab42231bacf,
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0x3b78e888d80fe17a, 0x7988096371e5d7e9,
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0xf7aa4d1a85996083, 0xb55aacf12c735610,
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0x724b8ecdd64d0da5, 0x30bb6f267fa73b36,
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0x4ac29f2a07bfd00d, 0x08327ec1ae55e69e,
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0xcf235cfd546bbd2b, 0x8dd3bd16fd818bb8,
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0x03f1f96f09fd3cd2, 0x41011884a0170a41,
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0x86103ab85a2951f4, 0xc4e0db53f3c36767,
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0xd8a453a01b3a09b3, 0x9a54b24bb2d03f20,
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0x5d45907748ee6495, 0x1fb5719ce1045206,
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0x919735e51578e56c, 0xd367d40ebc92d3ff,
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0x1476f63246ac884a, 0x568617d9ef46bed9,
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0xe085162ab69d5e3c, 0xa275f7c11f7768af,
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0x6564d5fde549331a, 0x279434164ca30589,
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0xa9b6706fb8dfb2e3, 0xeb46918411358470,
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0x2c57b3b8eb0bdfc5, 0x6ea7525342e1e956,
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0x72e3daa0aa188782, 0x30133b4b03f2b111,
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0xf7021977f9cceaa4, 0xb5f2f89c5026dc37,
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0x3bd0bce5a45a6b5d, 0x79205d0e0db05dce,
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0xbe317f32f78e067b, 0xfcc19ed95e6430e8,
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0x86b86ed5267cdbd3, 0xc4488f3e8f96ed40,
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0x0359ad0275a8b6f5, 0x41a94ce9dc428066,
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0xcf8b0890283e370c, 0x8d7be97b81d4019f,
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0x4a6acb477bea5a2a, 0x089a2aacd2006cb9,
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0x14dea25f3af9026d, 0x562e43b4931334fe,
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0x913f6188692d6f4b, 0xd3cf8063c0c759d8,
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0x5dedc41a34bbeeb2, 0x1f1d25f19d51d821,
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0xd80c07cd676f8394, 0x9afce626ce85b507
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};
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#endif
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: crc64part
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*
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* Description:
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* Continue CRC calculation on a part of the buffer.
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*
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****************************************************************************/
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#ifdef CONFIG_LIB_CRC64_FAST
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uint64_t crc64part(FAR const uint8_t *src, size_t len, uint64_t crc64val)
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{
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size_t i;
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for (i = 0; i < len; i++)
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{
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crc64val = crc64_tab[((crc64val >> 56) & 0xff) ^ src[i]] ^
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(crc64val << 8);
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}
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return crc64val;
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}
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#else
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uint64_t crc64part(FAR const uint8_t *src, size_t len, uint64_t crc64val)
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{
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size_t i;
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size_t j;
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for (i = 0; i < len; i++)
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{
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crc64val ^= (uint64_t)src[i] << 56;
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for (j = 0; j < 8; j++)
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{
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if ((crc64val & ((uint64_t)1 << 63)) != 0)
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{
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crc64val = (crc64val << 1) ^ CRC64_POLY;
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}
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else
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{
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crc64val = crc64val << 1;
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}
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}
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}
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return crc64val;
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}
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#endif
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/****************************************************************************
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* Name: crc64
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*
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* Description:
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* Return a 64-bit CRC of the contents of the 'src' buffer, length 'len'.
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*
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****************************************************************************/
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uint64_t crc64(FAR const uint8_t *src, size_t len)
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{
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return crc64part(src, len, CRC64_INIT) ^ CRC64_XOROUT;
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}
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