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Tim van der Lippe
9f4406f5e2
This updates the package-lock.json to pickup the latest versions of transitive dependencies that have the correct security fixes. R=jacktfranklin@chromium.org DISABLE_THIRD_PARTY_CHECK=Update node modules Fixed: 1068145 Change-Id: Ie9f476981cca78dcd8a5f6b3a75e659f36094eb0 Reviewed-on: https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/2144049 Commit-Queue: Tim van der Lippe <tvanderlippe@chromium.org> Auto-Submit: Tim van der Lippe <tvanderlippe@chromium.org> Reviewed-by: Jack Franklin <jacktfranklin@chromium.org>
1.4 KiB
1.4 KiB
buffer-crc32
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
install
npm install buffer-crc32
example
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>
tests
This was tested against the output of zlib's crc32 method. You can run
the tests withnpm test (requires tap)
see also
https://github.com/alexgorbatchev/node-crc, crc.buffer.crc32 also
supports buffer inputs and return unsigned ints (thanks @tjholowaychuk).
license
MIT/X11