Standard CRC-32 algorithm implementation in JS (for the browser and nodejs). Emphasis on correctness and performance.
In nodejs:
npm install crc-32
In the browser:
<script lang="javascript" src="crc32.js"></script>
The browser exposes a variable CRC32
-
CRC32.buf(byte array or buffer)assumes the argument is a set of 8 bit unsigned integers (e.g. nodejsBufferor simple array of ints) -
CRC32.bstr(binary string)interprets the argument as a binary string where thei-th byte isstr.charCodeAt(i) -
CRC32.str(string)interprets the argument as a standard JS string
make test will run the nodejs-based test. To run the in-browser tests, run a
local server and go to the ctest directory. To update the browser artifacts,
run make ctest.
make perf will run performance tests.
Unexpected code patterns were based on performance testing in node and browser:
-
Specifying an arbitrary initial CRC value
-
Supporting different polynomials (e.g. CRC32C)
Please consult the attached LICENSE file for details. All rights not explicitly granted by the Apache 2.0 license are reserved by the Original Author.
