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 = ;// works with buffersvar buf =// -> <Buffer 94 5a ab 4a>// has convenience methods for getting signed or unsigned intscrc32 // -> -1805997238crc32 // -> 2488970058// will cast to buffer if given a string, so you can// directly use foreign characters safely// -> <Buffer cb 03 1a c5>// and works in append mode toovar partialCrc = ;var partialCrc = ;var partialCrc = ;var partialCrc = ;var finalCrc = ; // -> <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).