Tons of Solutions Engineering work done today for the rest of the CS team! Headway, Howard Hanna, Engels, Brighton, etc. Also completed Datasnippers auth flow and worked on Anthology's script. Cloned Anthology's courses (900..) and will clone Full Story on Monday.
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# buffer-crc32
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[](http://travis-ci.org/brianloveswords/buffer-crc32)
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crc32 that works with binary data and fancy character sets, outputs
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buffer, signed or unsigned data and has tests.
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Derived from the sample CRC implementation in the PNG specification: http://www.w3.org/TR/PNG/#D-CRCAppendix
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# install
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```
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npm install buffer-crc32
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```
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# example
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```js
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var crc32 = require('buffer-crc32');
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// works with buffers
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var buf = Buffer([0x00, 0x73, 0x75, 0x70, 0x20, 0x62, 0x72, 0x6f, 0x00])
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crc32(buf) // -> <Buffer 94 5a ab 4a>
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// has convenience methods for getting signed or unsigned ints
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crc32.signed(buf) // -> -1805997238
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crc32.unsigned(buf) // -> 2488970058
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// will cast to buffer if given a string, so you can
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// directly use foreign characters safely
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crc32('自動販売機') // -> <Buffer cb 03 1a c5>
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// and works in append mode too
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var partialCrc = crc32('hey');
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var partialCrc = crc32(' ', partialCrc);
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var partialCrc = crc32('sup', partialCrc);
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var partialCrc = crc32(' ', partialCrc);
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var finalCrc = crc32('bros', partialCrc); // -> <Buffer 47 fa 55 70>
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```
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# tests
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This was tested against the output of zlib's crc32 method. You can run
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the tests with`npm test` (requires tap)
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# see also
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https://github.com/alexgorbatchev/node-crc, `crc.buffer.crc32` also
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supports buffer inputs and return unsigned ints (thanks @tjholowaychuk).
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# license
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MIT/X11
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