crc64 computes the CRC-64 of strings using the ECMA-182 standard. CRCs are full userdata values, to avoid issues with interpreters configured to use 32-bit integers.
In addition to computing the CRC, it's possible to:
- Create a CRC from two 32-bit integers
- Directly compare two CRCs using the
==operator - Get an hexadecimal representation of a CRC
It's just one file, either add it to your project or build a loadable Lua module with:
$ gcc -std=c99 -O2 -Werror -Wall -Wpedantic -shared -fPIC -o crc64.so crc64.c
local crc64 = require 'crc64'
local test1 = crc64.compute('123456789')
assert(test1 == crc64.create(0x995dc9bb, 0xdf1939fa))
print(test1) -- prints 0x995dc9bbdf1939fa
local test2 = crc64.compute('This is a test of the emergency broadcast system.')
assert(test2 == crc64.create(0x27db187f, 0xc15bbc72))
print(test2) -- prints 0x27db187fc15bbc72- 1.0.0
- First public release
MIT, enjoy.
Contains source code Copyright (C) 2014, UChicago Argonne, LLC. Check crc64.c.