crc-utils
v0.9.9
Published
CRC Utils. Combines two or more CRC32 checksums into new one.
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Node CRC32 Utils
Combines two or more CRC32 checksums into new one.
##How to build/install:
node-gyp configure build
or
npm install crc-utils
##Example:
var crcUtils = require('crc-utils');
// for crc32 checksum use lib: https://github.com/brianloveswords/buffer-crc32/
var crc32 = require('buffer-crc32');
var foo = new Buffer('foo');
var bar = new Buffer('bar');
var fooCrc32 = crc32(foo); // <Buffer 8c 73 65 21>
var barCrc32 = crc32(bar); // <Buffer 76 ff 8c aa>
var foobar = new Buffer('foobar');
var foobarCrc32 = crc32(foobar);
var foobarCrc32Combined = crcUtils.crc32_combine(
fooCrc32.readUInt32BE(0),
barCrc32.readUInt32BE(0),
bar.length
);
// Endianness prepared for GZIP format
console.log(foobarCrc32); // <Buffer 9e f6 1f 95>
console.log(foobarCrc32Combined); // <Buffer 95 1f f6 9e>