crc32 that works with binary data and fancy character sets, outputs buffer, signed or unsigned data and has tests.
Derived from the sample CRC implementation in the PNG specification: http://www.w3.org/TR/PNG/#D-CRCAppendix
npm install buffer-crc32
var crc32 = require('buffer-crc32'); // works with buffers var buf = Buffer([0x00, 0x73, 0x75, 0x70, 0x20, 0x62, 0x72, 0x6f, 0x00]) crc32(buf) // -> <Buffer 94 5a ab 4a> // has convenience methods for getting signed or unsigned ints crc32.signed(buf) // -> -1805997238 crc32.unsigned(buf) // -> 2488970058 // will cast to buffer if given a string, so you can // directly use foreign characters safely crc32('自動販売機') // -> <Buffer cb 03 1a c5> // and works in append mode too var partialCrc = crc32('hey'); var partialCrc = crc32(' ', partialCrc); var partialCrc = crc32('sup', partialCrc); var partialCrc = crc32(' ', partialCrc); var finalCrc = crc32('bros', partialCrc); // -> <Buffer 47 fa 55 70>
This was tested against the output of zlib's crc32 method. You can run
the tests with
npm test (requires tap)
supports buffer inputs and return unsigned ints (thanks @tjholowaychuk).
The npm package buffer-crc32 receives a total of 11,450,058 weekly downloads. As such, buffer-crc32 popularity was classified as popular.
We found that buffer-crc32 demonstrated a not healthy version release cadence and project activity because the last version was released a year ago.It has 1 open source maintainer collaborating on the project.