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@avocode/buffer-crc32
Advanced tools
Readme
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 withnpm test
(requires tap)
https://github.com/alexgorbatchev/node-crc, crc.buffer.crc32
also
supports buffer inputs and return unsigned ints (thanks @tjholowaychuk).
MIT/X11
FAQs
A pure javascript CRC32 algorithm that plays nice with binary data
The npm package @avocode/buffer-crc32 receives a total of 0 weekly downloads. As such, @avocode/buffer-crc32 popularity was classified as not popular.
We found that @avocode/buffer-crc32 demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 18 open source maintainers collaborating on the project.
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