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crc32.c
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crc32.c
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/* Copyright (c) 2012-2016, David Hauweele <[email protected]>
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
1. Redistributions of source code must retain the above copyright notice, this
list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright notice,
this list of conditions and the following disclaimer in the documentation
and/or other materials provided with the distribution.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <stdint.h>
#include "crc32.h"
/* TODO:
- ARM64 HW
- CRC-32K
*/
/* The classic CRC32 used in Ethernet, GZ, BZ2, PNG, PNG, MPEG2, ...
This is generally called simply 'crc32'. In this implementation
it is called 'crc32_IEEE' to avoid confusion with other common
polynomial. Unfortunately there is no hardware optimization.
Name : crc32_IEEE
Polynomial: 0x04c11db7
Reversed : 0xedb88320
*/
static const uint32_t crc32_IEEE_tbl[] = {
0x00000000L, 0x77073096L, 0xee0e612cL, 0x990951baL,
0x076dc419L, 0x706af48fL, 0xe963a535L, 0x9e6495a3L,
0x0edb8832L, 0x79dcb8a4L, 0xe0d5e91eL, 0x97d2d988L,
0x09b64c2bL, 0x7eb17cbdL, 0xe7b82d07L, 0x90bf1d91L,
0x1db71064L, 0x6ab020f2L, 0xf3b97148L, 0x84be41deL,
0x1adad47dL, 0x6ddde4ebL, 0xf4d4b551L, 0x83d385c7L,
0x136c9856L, 0x646ba8c0L, 0xfd62f97aL, 0x8a65c9ecL,
0x14015c4fL, 0x63066cd9L, 0xfa0f3d63L, 0x8d080df5L,
0x3b6e20c8L, 0x4c69105eL, 0xd56041e4L, 0xa2677172L,
0x3c03e4d1L, 0x4b04d447L, 0xd20d85fdL, 0xa50ab56bL,
0x35b5a8faL, 0x42b2986cL, 0xdbbbc9d6L, 0xacbcf940L,
0x32d86ce3L, 0x45df5c75L, 0xdcd60dcfL, 0xabd13d59L,
0x26d930acL, 0x51de003aL, 0xc8d75180L, 0xbfd06116L,
0x21b4f4b5L, 0x56b3c423L, 0xcfba9599L, 0xb8bda50fL,
0x2802b89eL, 0x5f058808L, 0xc60cd9b2L, 0xb10be924L,
0x2f6f7c87L, 0x58684c11L, 0xc1611dabL, 0xb6662d3dL,
0x76dc4190L, 0x01db7106L, 0x98d220bcL, 0xefd5102aL,
0x71b18589L, 0x06b6b51fL, 0x9fbfe4a5L, 0xe8b8d433L,
0x7807c9a2L, 0x0f00f934L, 0x9609a88eL, 0xe10e9818L,
0x7f6a0dbbL, 0x086d3d2dL, 0x91646c97L, 0xe6635c01L,
0x6b6b51f4L, 0x1c6c6162L, 0x856530d8L, 0xf262004eL,
0x6c0695edL, 0x1b01a57bL, 0x8208f4c1L, 0xf50fc457L,
0x65b0d9c6L, 0x12b7e950L, 0x8bbeb8eaL, 0xfcb9887cL,
0x62dd1ddfL, 0x15da2d49L, 0x8cd37cf3L, 0xfbd44c65L,
0x4db26158L, 0x3ab551ceL, 0xa3bc0074L, 0xd4bb30e2L,
0x4adfa541L, 0x3dd895d7L, 0xa4d1c46dL, 0xd3d6f4fbL,
0x4369e96aL, 0x346ed9fcL, 0xad678846L, 0xda60b8d0L,
0x44042d73L, 0x33031de5L, 0xaa0a4c5fL, 0xdd0d7cc9L,
0x5005713cL, 0x270241aaL, 0xbe0b1010L, 0xc90c2086L,
0x5768b525L, 0x206f85b3L, 0xb966d409L, 0xce61e49fL,
0x5edef90eL, 0x29d9c998L, 0xb0d09822L, 0xc7d7a8b4L,
0x59b33d17L, 0x2eb40d81L, 0xb7bd5c3bL, 0xc0ba6cadL,
0xedb88320L, 0x9abfb3b6L, 0x03b6e20cL, 0x74b1d29aL,
0xead54739L, 0x9dd277afL, 0x04db2615L, 0x73dc1683L,
0xe3630b12L, 0x94643b84L, 0x0d6d6a3eL, 0x7a6a5aa8L,
0xe40ecf0bL, 0x9309ff9dL, 0x0a00ae27L, 0x7d079eb1L,
0xf00f9344L, 0x8708a3d2L, 0x1e01f268L, 0x6906c2feL,
0xf762575dL, 0x806567cbL, 0x196c3671L, 0x6e6b06e7L,
0xfed41b76L, 0x89d32be0L, 0x10da7a5aL, 0x67dd4accL,
0xf9b9df6fL, 0x8ebeeff9L, 0x17b7be43L, 0x60b08ed5L,
0xd6d6a3e8L, 0xa1d1937eL, 0x38d8c2c4L, 0x4fdff252L,
0xd1bb67f1L, 0xa6bc5767L, 0x3fb506ddL, 0x48b2364bL,
0xd80d2bdaL, 0xaf0a1b4cL, 0x36034af6L, 0x41047a60L,
0xdf60efc3L, 0xa867df55L, 0x316e8eefL, 0x4669be79L,
0xcb61b38cL, 0xbc66831aL, 0x256fd2a0L, 0x5268e236L,
0xcc0c7795L, 0xbb0b4703L, 0x220216b9L, 0x5505262fL,
0xc5ba3bbeL, 0xb2bd0b28L, 0x2bb45a92L, 0x5cb36a04L,
0xc2d7ffa7L, 0xb5d0cf31L, 0x2cd99e8bL, 0x5bdeae1dL,
0x9b64c2b0L, 0xec63f226L, 0x756aa39cL, 0x026d930aL,
0x9c0906a9L, 0xeb0e363fL, 0x72076785L, 0x05005713L,
0x95bf4a82L, 0xe2b87a14L, 0x7bb12baeL, 0x0cb61b38L,
0x92d28e9bL, 0xe5d5be0dL, 0x7cdcefb7L, 0x0bdbdf21L,
0x86d3d2d4L, 0xf1d4e242L, 0x68ddb3f8L, 0x1fda836eL,
0x81be16cdL, 0xf6b9265bL, 0x6fb077e1L, 0x18b74777L,
0x88085ae6L, 0xff0f6a70L, 0x66063bcaL, 0x11010b5cL,
0x8f659effL, 0xf862ae69L, 0x616bffd3L, 0x166ccf45L,
0xa00ae278L, 0xd70dd2eeL, 0x4e048354L, 0x3903b3c2L,
0xa7672661L, 0xd06016f7L, 0x4969474dL, 0x3e6e77dbL,
0xaed16a4aL, 0xd9d65adcL, 0x40df0b66L, 0x37d83bf0L,
0xa9bcae53L, 0xdebb9ec5L, 0x47b2cf7fL, 0x30b5ffe9L,
0xbdbdf21cL, 0xcabac28aL, 0x53b39330L, 0x24b4a3a6L,
0xbad03605L, 0xcdd70693L, 0x54de5729L, 0x23d967bfL,
0xb3667a2eL, 0xc4614ab8L, 0x5d681b02L, 0x2a6f2b94L,
0xb40bbe37L, 0xc30c8ea1L, 0x5a05df1bL, 0x2d02ef8dL
};
uint32_t crc32_IEEE(const unsigned char *s,
unsigned long len,
uint32_t crc)
{
crc = ~crc;
while(len--)
crc = crc32_IEEE_tbl[(crc ^ *s++) & 0xff] ^ (crc >> 8);
return ~crc;
}
/* The Castagnoli polynomial also known as 'crc32c'.
Another common CRC32 polynomial used in SCTP, ext4,
BTRFS, ... It is generally used in newer standards,
and has the benefits of hardware optimizations on
some architectures.
Name : crc32_c
Polynomial: 0x1edc6f41
Reversed : 0x82f63b78
*/
#ifdef __SSE4_2__ /* crc32 instruction was introduced with SSE 4.2 */
# ifdef __x86_64__
typedef uint64_t wide_reg;
# define CRC32_OPERAND_SIZE "q"
# else /* __i386__ */
typedef uint32_t wide_reg;
# define CRC32_OPERAND_SIZE "l"
# endif /* arch */
static unsigned long crc32_intel(const unsigned char *s,
unsigned long len,
unsigned long crc)
{
unsigned int quot = len / sizeof(wide_reg);
unsigned int rem = len % sizeof(wide_reg);
const wide_reg * ul = (const wide_reg *)s;
while(quot--)
__asm__("crc32" CRC32_OPERAND_SIZE " %[ul], %[crc]"
: [crc] "=r" (crc)
: "[crc]" (crc), [ul] "r" (*ul++));
s = (const unsigned char *)ul;
while(rem--)
__asm__("crc32b %[s], %[crc]"
: [crc] "=r" (crc)
: "[crc]" (crc), [s] "r" (*s++));
return crc;
}
uint32_t crc32_c(const unsigned char *s,
unsigned long len,
uint32_t crc)
{
return crc32_intel(s, len, crc);
}
#else /* generic */
static const uint32_t crc32_c_tbl[] = {
0x00000000L, 0xf26b8303L, 0xe13b70f7L, 0x1350f3f4L,
0xc79a971fL, 0x35f1141cL, 0x26a1e7e8L, 0xd4ca64ebL,
0x8ad958cfL, 0x78b2dbccL, 0x6be22838L, 0x9989ab3bL,
0x4d43cfd0L, 0xbf284cd3L, 0xac78bf27L, 0x5e133c24L,
0x105ec76fL, 0xe235446cL, 0xf165b798L, 0x030e349bL,
0xd7c45070L, 0x25afd373L, 0x36ff2087L, 0xc494a384L,
0x9a879fa0L, 0x68ec1ca3L, 0x7bbcef57L, 0x89d76c54L,
0x5d1d08bfL, 0xaf768bbcL, 0xbc267848L, 0x4e4dfb4bL,
0x20bd8edeL, 0xd2d60dddL, 0xc186fe29L, 0x33ed7d2aL,
0xe72719c1L, 0x154c9ac2L, 0x061c6936L, 0xf477ea35L,
0xaa64d611L, 0x580f5512L, 0x4b5fa6e6L, 0xb93425e5L,
0x6dfe410eL, 0x9f95c20dL, 0x8cc531f9L, 0x7eaeb2faL,
0x30e349b1L, 0xc288cab2L, 0xd1d83946L, 0x23b3ba45L,
0xf779deaeL, 0x05125dadL, 0x1642ae59L, 0xe4292d5aL,
0xba3a117eL, 0x4851927dL, 0x5b016189L, 0xa96ae28aL,
0x7da08661L, 0x8fcb0562L, 0x9c9bf696L, 0x6ef07595L,
0x417b1dbcL, 0xb3109ebfL, 0xa0406d4bL, 0x522bee48L,
0x86e18aa3L, 0x748a09a0L, 0x67dafa54L, 0x95b17957L,
0xcba24573L, 0x39c9c670L, 0x2a993584L, 0xd8f2b687L,
0x0c38d26cL, 0xfe53516fL, 0xed03a29bL, 0x1f682198L,
0x5125dad3L, 0xa34e59d0L, 0xb01eaa24L, 0x42752927L,
0x96bf4dccL, 0x64d4cecfL, 0x77843d3bL, 0x85efbe38L,
0xdbfc821cL, 0x2997011fL, 0x3ac7f2ebL, 0xc8ac71e8L,
0x1c661503L, 0xee0d9600L, 0xfd5d65f4L, 0x0f36e6f7L,
0x61c69362L, 0x93ad1061L, 0x80fde395L, 0x72966096L,
0xa65c047dL, 0x5437877eL, 0x4767748aL, 0xb50cf789L,
0xeb1fcbadL, 0x197448aeL, 0x0a24bb5aL, 0xf84f3859L,
0x2c855cb2L, 0xdeeedfb1L, 0xcdbe2c45L, 0x3fd5af46L,
0x7198540dL, 0x83f3d70eL, 0x90a324faL, 0x62c8a7f9L,
0xb602c312L, 0x44694011L, 0x5739b3e5L, 0xa55230e6L,
0xfb410cc2L, 0x092a8fc1L, 0x1a7a7c35L, 0xe811ff36L,
0x3cdb9bddL, 0xceb018deL, 0xdde0eb2aL, 0x2f8b6829L,
0x82f63b78L, 0x709db87bL, 0x63cd4b8fL, 0x91a6c88cL,
0x456cac67L, 0xb7072f64L, 0xa457dc90L, 0x563c5f93L,
0x082f63b7L, 0xfa44e0b4L, 0xe9141340L, 0x1b7f9043L,
0xcfb5f4a8L, 0x3dde77abL, 0x2e8e845fL, 0xdce5075cL,
0x92a8fc17L, 0x60c37f14L, 0x73938ce0L, 0x81f80fe3L,
0x55326b08L, 0xa759e80bL, 0xb4091bffL, 0x466298fcL,
0x1871a4d8L, 0xea1a27dbL, 0xf94ad42fL, 0x0b21572cL,
0xdfeb33c7L, 0x2d80b0c4L, 0x3ed04330L, 0xccbbc033L,
0xa24bb5a6L, 0x502036a5L, 0x4370c551L, 0xb11b4652L,
0x65d122b9L, 0x97baa1baL, 0x84ea524eL, 0x7681d14dL,
0x2892ed69L, 0xdaf96e6aL, 0xc9a99d9eL, 0x3bc21e9dL,
0xef087a76L, 0x1d63f975L, 0x0e330a81L, 0xfc588982L,
0xb21572c9L, 0x407ef1caL, 0x532e023eL, 0xa145813dL,
0x758fe5d6L, 0x87e466d5L, 0x94b49521L, 0x66df1622L,
0x38cc2a06L, 0xcaa7a905L, 0xd9f75af1L, 0x2b9cd9f2L,
0xff56bd19L, 0x0d3d3e1aL, 0x1e6dcdeeL, 0xec064eedL,
0xc38d26c4L, 0x31e6a5c7L, 0x22b65633L, 0xd0ddd530L,
0x0417b1dbL, 0xf67c32d8L, 0xe52cc12cL, 0x1747422fL,
0x49547e0bL, 0xbb3ffd08L, 0xa86f0efcL, 0x5a048dffL,
0x8ecee914L, 0x7ca56a17L, 0x6ff599e3L, 0x9d9e1ae0L,
0xd3d3e1abL, 0x21b862a8L, 0x32e8915cL, 0xc083125fL,
0x144976b4L, 0xe622f5b7L, 0xf5720643L, 0x07198540L,
0x590ab964L, 0xab613a67L, 0xb831c993L, 0x4a5a4a90L,
0x9e902e7bL, 0x6cfbad78L, 0x7fab5e8cL, 0x8dc0dd8fL,
0xe330a81aL, 0x115b2b19L, 0x020bd8edL, 0xf0605beeL,
0x24aa3f05L, 0xd6c1bc06L, 0xc5914ff2L, 0x37faccf1L,
0x69e9f0d5L, 0x9b8273d6L, 0x88d28022L, 0x7ab90321L,
0xae7367caL, 0x5c18e4c9L, 0x4f48173dL, 0xbd23943eL,
0xf36e6f75L, 0x0105ec76L, 0x12551f82L, 0xe03e9c81L,
0x34f4f86aL, 0xc69f7b69L, 0xd5cf889dL, 0x27a40b9eL,
0x79b737baL, 0x8bdcb4b9L, 0x988c474dL, 0x6ae7c44eL,
0xbe2da0a5L, 0x4c4623a6L, 0x5f16d052L, 0xad7d5351L
};
uint32_t crc32_c(const unsigned char *s,
unsigned long len,
uint32_t crc)
{
while(len--)
crc = crc32_c_tbl[(crc ^ *s++) & 0xff] ^ (crc >> 8);
return crc;
}
#endif