shrine-medco/apps/steward-app/src/main/js/app/server/node_modules/buffer-crc3286ddbac34a31fork/1.22.8-medco
shrine-medco/apps/steward-app/src/main/js/app/server/node_modules/buffer-crc32
86ddbac34a31fork/1.22.8-medco
README.md
README.md
buffer-crc32
![Build Status](http://travis-ci.org/brianloveswords/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
js 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 with`npm 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
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