-
-
Save danlark1/69c9d5e1d356eaa32dbdfccb2e19f401 to your computer and use it in GitHub Desktop.
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
#include <stdint.h> | |
#include <stddef.h> | |
#include <stdio.h> | |
#define FNV32INIT 2166136261U | |
#define FNV32PRIME 16777619U | |
#define FNV64INIT 14695981039346656037ULL | |
#define FNV64PRIME 1099511628211ULL | |
// Any table | |
extern unsigned long crc64table[256]; | |
unsigned long fnv64(const void *p, size_t len) { | |
unsigned long init = FNV64INIT; | |
const unsigned char *_p = (const unsigned char *)p; | |
for (size_t i = 0; i < len; ++i) { | |
init = (init * FNV64PRIME) ^ _p[i]; | |
} | |
return init; | |
} | |
unsigned long crc64(unsigned long crc, const void *p, size_t len) { | |
size_t i, t; | |
const unsigned char *_p = (const unsigned char *)p; | |
for (i = 0; i < len; i++) { | |
t = ((crc >> 56) ^ (*_p++)) & 0xFF; | |
crc = crc64table[t] ^ (crc << 8); | |
} | |
return crc; | |
} | |
int main() { | |
const char* data1 = "l.im/8ca"; | |
const char* data2 = "l.im/8cf"; | |
size_t size = 8; | |
unsigned long crc = crc64(fnv64(data1, size), data1, size); | |
printf("%lu\n", crc); // 6193082687915471267 | |
crc = crc64(fnv64(data2, size), data2, size); | |
printf("%lu\n", crc); // 6193082687915471267 | |
} | |
unsigned long crc64table[256] = { | |
0x0000000000000000ULL, 0x42f0e1eba9ea3693ULL, | |
0x85e1c3d753d46d26ULL, 0xc711223cfa3e5bb5ULL, | |
0x493366450e42ecdfULL, 0x0bc387aea7a8da4cULL, | |
0xccd2a5925d9681f9ULL, 0x8e224479f47cb76aULL, | |
0x9266cc8a1c85d9beULL, 0xd0962d61b56fef2dULL, | |
0x17870f5d4f51b498ULL, 0x5577eeb6e6bb820bULL, | |
0xdb55aacf12c73561ULL, 0x99a54b24bb2d03f2ULL, | |
0x5eb4691841135847ULL, 0x1c4488f3e8f96ed4ULL, | |
0x663d78ff90e185efULL, 0x24cd9914390bb37cULL, | |
0xe3dcbb28c335e8c9ULL, 0xa12c5ac36adfde5aULL, | |
0x2f0e1eba9ea36930ULL, 0x6dfeff5137495fa3ULL, | |
0xaaefdd6dcd770416ULL, 0xe81f3c86649d3285ULL, | |
0xf45bb4758c645c51ULL, 0xb6ab559e258e6ac2ULL, | |
0x71ba77a2dfb03177ULL, 0x334a9649765a07e4ULL, | |
0xbd68d2308226b08eULL, 0xff9833db2bcc861dULL, | |
0x388911e7d1f2dda8ULL, 0x7a79f00c7818eb3bULL, | |
0xcc7af1ff21c30bdeULL, 0x8e8a101488293d4dULL, | |
0x499b3228721766f8ULL, 0x0b6bd3c3dbfd506bULL, | |
0x854997ba2f81e701ULL, 0xc7b97651866bd192ULL, | |
0x00a8546d7c558a27ULL, 0x4258b586d5bfbcb4ULL, | |
0x5e1c3d753d46d260ULL, 0x1cecdc9e94ace4f3ULL, | |
0xdbfdfea26e92bf46ULL, 0x990d1f49c77889d5ULL, | |
0x172f5b3033043ebfULL, 0x55dfbadb9aee082cULL, | |
0x92ce98e760d05399ULL, 0xd03e790cc93a650aULL, | |
0xaa478900b1228e31ULL, 0xe8b768eb18c8b8a2ULL, | |
0x2fa64ad7e2f6e317ULL, 0x6d56ab3c4b1cd584ULL, | |
0xe374ef45bf6062eeULL, 0xa1840eae168a547dULL, | |
0x66952c92ecb40fc8ULL, 0x2465cd79455e395bULL, | |
0x3821458aada7578fULL, 0x7ad1a461044d611cULL, | |
0xbdc0865dfe733aa9ULL, 0xff3067b657990c3aULL, | |
0x711223cfa3e5bb50ULL, 0x33e2c2240a0f8dc3ULL, | |
0xf4f3e018f031d676ULL, 0xb60301f359dbe0e5ULL, | |
0xda050215ea6c212fULL, 0x98f5e3fe438617bcULL, | |
0x5fe4c1c2b9b84c09ULL, 0x1d14202910527a9aULL, | |
0x93366450e42ecdf0ULL, 0xd1c685bb4dc4fb63ULL, | |
0x16d7a787b7faa0d6ULL, 0x5427466c1e109645ULL, | |
0x4863ce9ff6e9f891ULL, 0x0a932f745f03ce02ULL, | |
0xcd820d48a53d95b7ULL, 0x8f72eca30cd7a324ULL, | |
0x0150a8daf8ab144eULL, 0x43a04931514122ddULL, | |
0x84b16b0dab7f7968ULL, 0xc6418ae602954ffbULL, | |
0xbc387aea7a8da4c0ULL, 0xfec89b01d3679253ULL, | |
0x39d9b93d2959c9e6ULL, 0x7b2958d680b3ff75ULL, | |
0xf50b1caf74cf481fULL, 0xb7fbfd44dd257e8cULL, | |
0x70eadf78271b2539ULL, 0x321a3e938ef113aaULL, | |
0x2e5eb66066087d7eULL, 0x6cae578bcfe24bedULL, | |
0xabbf75b735dc1058ULL, 0xe94f945c9c3626cbULL, | |
0x676dd025684a91a1ULL, 0x259d31cec1a0a732ULL, | |
0xe28c13f23b9efc87ULL, 0xa07cf2199274ca14ULL, | |
0x167ff3eacbaf2af1ULL, 0x548f120162451c62ULL, | |
0x939e303d987b47d7ULL, 0xd16ed1d631917144ULL, | |
0x5f4c95afc5edc62eULL, 0x1dbc74446c07f0bdULL, | |
0xdaad56789639ab08ULL, 0x985db7933fd39d9bULL, | |
0x84193f60d72af34fULL, 0xc6e9de8b7ec0c5dcULL, | |
0x01f8fcb784fe9e69ULL, 0x43081d5c2d14a8faULL, | |
0xcd2a5925d9681f90ULL, 0x8fdab8ce70822903ULL, | |
0x48cb9af28abc72b6ULL, 0x0a3b7b1923564425ULL, | |
0x70428b155b4eaf1eULL, 0x32b26afef2a4998dULL, | |
0xf5a348c2089ac238ULL, 0xb753a929a170f4abULL, | |
0x3971ed50550c43c1ULL, 0x7b810cbbfce67552ULL, | |
0xbc902e8706d82ee7ULL, 0xfe60cf6caf321874ULL, | |
0xe224479f47cb76a0ULL, 0xa0d4a674ee214033ULL, | |
0x67c58448141f1b86ULL, 0x253565a3bdf52d15ULL, | |
0xab1721da49899a7fULL, 0xe9e7c031e063acecULL, | |
0x2ef6e20d1a5df759ULL, 0x6c0603e6b3b7c1caULL, | |
0xf6fae5c07d3274cdULL, 0xb40a042bd4d8425eULL, | |
0x731b26172ee619ebULL, 0x31ebc7fc870c2f78ULL, | |
0xbfc9838573709812ULL, 0xfd39626eda9aae81ULL, | |
0x3a28405220a4f534ULL, 0x78d8a1b9894ec3a7ULL, | |
0x649c294a61b7ad73ULL, 0x266cc8a1c85d9be0ULL, | |
0xe17dea9d3263c055ULL, 0xa38d0b769b89f6c6ULL, | |
0x2daf4f0f6ff541acULL, 0x6f5faee4c61f773fULL, | |
0xa84e8cd83c212c8aULL, 0xeabe6d3395cb1a19ULL, | |
0x90c79d3fedd3f122ULL, 0xd2377cd44439c7b1ULL, | |
0x15265ee8be079c04ULL, 0x57d6bf0317edaa97ULL, | |
0xd9f4fb7ae3911dfdULL, 0x9b041a914a7b2b6eULL, | |
0x5c1538adb04570dbULL, 0x1ee5d94619af4648ULL, | |
0x02a151b5f156289cULL, 0x4051b05e58bc1e0fULL, | |
0x87409262a28245baULL, 0xc5b073890b687329ULL, | |
0x4b9237f0ff14c443ULL, 0x0962d61b56fef2d0ULL, | |
0xce73f427acc0a965ULL, 0x8c8315cc052a9ff6ULL, | |
0x3a80143f5cf17f13ULL, 0x7870f5d4f51b4980ULL, | |
0xbf61d7e80f251235ULL, 0xfd913603a6cf24a6ULL, | |
0x73b3727a52b393ccULL, 0x31439391fb59a55fULL, | |
0xf652b1ad0167feeaULL, 0xb4a25046a88dc879ULL, | |
0xa8e6d8b54074a6adULL, 0xea16395ee99e903eULL, | |
0x2d071b6213a0cb8bULL, 0x6ff7fa89ba4afd18ULL, | |
0xe1d5bef04e364a72ULL, 0xa3255f1be7dc7ce1ULL, | |
0x64347d271de22754ULL, 0x26c49cccb40811c7ULL, | |
0x5cbd6cc0cc10fafcULL, 0x1e4d8d2b65facc6fULL, | |
0xd95caf179fc497daULL, 0x9bac4efc362ea149ULL, | |
0x158e0a85c2521623ULL, 0x577eeb6e6bb820b0ULL, | |
0x906fc95291867b05ULL, 0xd29f28b9386c4d96ULL, | |
0xcedba04ad0952342ULL, 0x8c2b41a1797f15d1ULL, | |
0x4b3a639d83414e64ULL, 0x09ca82762aab78f7ULL, | |
0x87e8c60fded7cf9dULL, 0xc51827e4773df90eULL, | |
0x020905d88d03a2bbULL, 0x40f9e43324e99428ULL, | |
0x2cffe7d5975e55e2ULL, 0x6e0f063e3eb46371ULL, | |
0xa91e2402c48a38c4ULL, 0xebeec5e96d600e57ULL, | |
0x65cc8190991cb93dULL, 0x273c607b30f68faeULL, | |
0xe02d4247cac8d41bULL, 0xa2dda3ac6322e288ULL, | |
0xbe992b5f8bdb8c5cULL, 0xfc69cab42231bacfULL, | |
0x3b78e888d80fe17aULL, 0x7988096371e5d7e9ULL, | |
0xf7aa4d1a85996083ULL, 0xb55aacf12c735610ULL, | |
0x724b8ecdd64d0da5ULL, 0x30bb6f267fa73b36ULL, | |
0x4ac29f2a07bfd00dULL, 0x08327ec1ae55e69eULL, | |
0xcf235cfd546bbd2bULL, 0x8dd3bd16fd818bb8ULL, | |
0x03f1f96f09fd3cd2ULL, 0x41011884a0170a41ULL, | |
0x86103ab85a2951f4ULL, 0xc4e0db53f3c36767ULL, | |
0xd8a453a01b3a09b3ULL, 0x9a54b24bb2d03f20ULL, | |
0x5d45907748ee6495ULL, 0x1fb5719ce1045206ULL, | |
0x919735e51578e56cULL, 0xd367d40ebc92d3ffULL, | |
0x1476f63246ac884aULL, 0x568617d9ef46bed9ULL, | |
0xe085162ab69d5e3cULL, 0xa275f7c11f7768afULL, | |
0x6564d5fde549331aULL, 0x279434164ca30589ULL, | |
0xa9b6706fb8dfb2e3ULL, 0xeb46918411358470ULL, | |
0x2c57b3b8eb0bdfc5ULL, 0x6ea7525342e1e956ULL, | |
0x72e3daa0aa188782ULL, 0x30133b4b03f2b111ULL, | |
0xf7021977f9cceaa4ULL, 0xb5f2f89c5026dc37ULL, | |
0x3bd0bce5a45a6b5dULL, 0x79205d0e0db05dceULL, | |
0xbe317f32f78e067bULL, 0xfcc19ed95e6430e8ULL, | |
0x86b86ed5267cdbd3ULL, 0xc4488f3e8f96ed40ULL, | |
0x0359ad0275a8b6f5ULL, 0x41a94ce9dc428066ULL, | |
0xcf8b0890283e370cULL, 0x8d7be97b81d4019fULL, | |
0x4a6acb477bea5a2aULL, 0x089a2aacd2006cb9ULL, | |
0x14dea25f3af9026dULL, 0x562e43b4931334feULL, | |
0x913f6188692d6f4bULL, 0xd3cf8063c0c759d8ULL, | |
0x5dedc41a34bbeeb2ULL, 0x1f1d25f19d51d821ULL, | |
0xd80c07cd676f8394ULL, 0x9afce626ce85b507ULL, | |
}; |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment