pax_global_header00006660000000000000000000000064121057404530014513gustar00rootroot0000000000000052 comment=1b7489d30484130d2dcddfbe888fb0d03149127b buffer-crc32-0.2.1/000077500000000000000000000000001210574045300136765ustar00rootroot00000000000000buffer-crc32-0.2.1/.gitignore000066400000000000000000000000141210574045300156610ustar00rootroot00000000000000node_modulesbuffer-crc32-0.2.1/.travis.yml000066400000000000000000000001641210574045300160100ustar00rootroot00000000000000language: node_js node_js: - 0.6 - 0.8 notifications: email: recipients: - brianloveswords@gmail.combuffer-crc32-0.2.1/LICENSE000066400000000000000000000020541210574045300147040ustar00rootroot00000000000000Copyright (c) 2013 Brian J. Brennan Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. buffer-crc32-0.2.1/README.md000066400000000000000000000026621210574045300151630ustar00rootroot00000000000000# buffer-crc32 [![Build Status](https://secure.travis-ci.org/brianloveswords/buffer-crc32.png?branch=master)](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) // -> // 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') // -> // 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); // -> ``` # 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 buffer-crc32-0.2.1/index.js000066400000000000000000000075111210574045300153470ustar00rootroot00000000000000var Buffer = require('buffer').Buffer; var CRC_TABLE = [ 0x00000000, 0x77073096, 0xee0e612c, 0x990951ba, 0x076dc419, 0x706af48f, 0xe963a535, 0x9e6495a3, 0x0edb8832, 0x79dcb8a4, 0xe0d5e91e, 0x97d2d988, 0x09b64c2b, 0x7eb17cbd, 0xe7b82d07, 0x90bf1d91, 0x1db71064, 0x6ab020f2, 0xf3b97148, 0x84be41de, 0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7, 0x136c9856, 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec, 0x14015c4f, 0x63066cd9, 0xfa0f3d63, 0x8d080df5, 0x3b6e20c8, 0x4c69105e, 0xd56041e4, 0xa2677172, 0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b, 0x35b5a8fa, 0x42b2986c, 0xdbbbc9d6, 0xacbcf940, 0x32d86ce3, 0x45df5c75, 0xdcd60dcf, 0xabd13d59, 0x26d930ac, 0x51de003a, 0xc8d75180, 0xbfd06116, 0x21b4f4b5, 0x56b3c423, 0xcfba9599, 0xb8bda50f, 0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924, 0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d, 0x76dc4190, 0x01db7106, 0x98d220bc, 0xefd5102a, 0x71b18589, 0x06b6b51f, 0x9fbfe4a5, 0xe8b8d433, 0x7807c9a2, 0x0f00f934, 0x9609a88e, 0xe10e9818, 0x7f6a0dbb, 0x086d3d2d, 0x91646c97, 0xe6635c01, 0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e, 0x6c0695ed, 0x1b01a57b, 0x8208f4c1, 0xf50fc457, 0x65b0d9c6, 0x12b7e950, 0x8bbeb8ea, 0xfcb9887c, 0x62dd1ddf, 0x15da2d49, 0x8cd37cf3, 0xfbd44c65, 0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2, 0x4adfa541, 0x3dd895d7, 0xa4d1c46d, 0xd3d6f4fb, 0x4369e96a, 0x346ed9fc, 0xad678846, 0xda60b8d0, 0x44042d73, 0x33031de5, 0xaa0a4c5f, 0xdd0d7cc9, 0x5005713c, 0x270241aa, 0xbe0b1010, 0xc90c2086, 0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f, 0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4, 0x59b33d17, 0x2eb40d81, 0xb7bd5c3b, 0xc0ba6cad, 0xedb88320, 0x9abfb3b6, 0x03b6e20c, 0x74b1d29a, 0xead54739, 0x9dd277af, 0x04db2615, 0x73dc1683, 0xe3630b12, 0x94643b84, 0x0d6d6a3e, 0x7a6a5aa8, 0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1, 0xf00f9344, 0x8708a3d2, 0x1e01f268, 0x6906c2fe, 0xf762575d, 0x806567cb, 0x196c3671, 0x6e6b06e7, 0xfed41b76, 0x89d32be0, 0x10da7a5a, 0x67dd4acc, 0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5, 0xd6d6a3e8, 0xa1d1937e, 0x38d8c2c4, 0x4fdff252, 0xd1bb67f1, 0xa6bc5767, 0x3fb506dd, 0x48b2364b, 0xd80d2bda, 0xaf0a1b4c, 0x36034af6, 0x41047a60, 0xdf60efc3, 0xa867df55, 0x316e8eef, 0x4669be79, 0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236, 0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f, 0xc5ba3bbe, 0xb2bd0b28, 0x2bb45a92, 0x5cb36a04, 0xc2d7ffa7, 0xb5d0cf31, 0x2cd99e8b, 0x5bdeae1d, 0x9b64c2b0, 0xec63f226, 0x756aa39c, 0x026d930a, 0x9c0906a9, 0xeb0e363f, 0x72076785, 0x05005713, 0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38, 0x92d28e9b, 0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21, 0x86d3d2d4, 0xf1d4e242, 0x68ddb3f8, 0x1fda836e, 0x81be16cd, 0xf6b9265b, 0x6fb077e1, 0x18b74777, 0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c, 0x8f659eff, 0xf862ae69, 0x616bffd3, 0x166ccf45, 0xa00ae278, 0xd70dd2ee, 0x4e048354, 0x3903b3c2, 0xa7672661, 0xd06016f7, 0x4969474d, 0x3e6e77db, 0xaed16a4a, 0xd9d65adc, 0x40df0b66, 0x37d83bf0, 0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9, 0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6, 0xbad03605, 0xcdd70693, 0x54de5729, 0x23d967bf, 0xb3667a2e, 0xc4614ab8, 0x5d681b02, 0x2a6f2b94, 0xb40bbe37, 0xc30c8ea1, 0x5a05df1b, 0x2d02ef8d ]; function bufferizeInt(num) { var tmp = Buffer(4); tmp.writeInt32BE(num, 0); return tmp; } function _crc32(buf, previous) { if (!Buffer.isBuffer(buf)) { buf = Buffer(buf); } if (Buffer.isBuffer(previous)) { previous = previous.readUInt32BE(0); } var crc = ~~previous ^ -1; for (var n = 0; n < buf.length; n++) { crc = CRC_TABLE[(crc ^ buf[n]) & 0xff] ^ (crc >>> 8); } return (crc ^ -1); } function crc32() { return bufferizeInt(_crc32.apply(null, arguments)); } crc32.signed = function () { return _crc32.apply(null, arguments); }; crc32.unsigned = function () { return _crc32.apply(null, arguments) >>> 0; }; module.exports = crc32; buffer-crc32-0.2.1/package.json000066400000000000000000000013101210574045300161570ustar00rootroot00000000000000{ "author": "Brian J. Brennan (http://bjb.io)", "name": "buffer-crc32", "description": "A pure javascript CRC32 algorithm that plays nice with binary data", "version": "0.2.1", "contributors": [ { "name": "Vladimir Kuznetsov", "github": "mistakster" } ], "homepage": "https://github.com/brianloveswords/buffer-crc32", "repository": { "type": "git", "url": "git://github.com/brianloveswords/buffer-crc32.git" }, "main": "index.js", "scripts": { "test": "./node_modules/.bin/tap tests/*.test.js" }, "dependencies": {}, "devDependencies": { "tap": "~0.2.5" }, "optionalDependencies": {}, "engines": { "node": "*" } } buffer-crc32-0.2.1/tests/000077500000000000000000000000001210574045300150405ustar00rootroot00000000000000buffer-crc32-0.2.1/tests/crc.test.js000066400000000000000000000042161210574045300171260ustar00rootroot00000000000000var crc32 = require('..'); var test = require('tap').test; test('simple crc32 is no problem', function (t) { var input = Buffer('hey sup bros'); var expected = Buffer([0x47, 0xfa, 0x55, 0x70]); t.same(crc32(input), expected); t.end(); }); test('another simple one', function (t) { var input = Buffer('IEND'); var expected = Buffer([0xae, 0x42, 0x60, 0x82]); t.same(crc32(input), expected); t.end(); }); test('slightly more complex', function (t) { var input = Buffer([0x00, 0x00, 0x00]); var expected = Buffer([0xff, 0x41, 0xd9, 0x12]); t.same(crc32(input), expected); t.end(); }); test('complex crc32 gets calculated like a champ', function (t) { var input = Buffer('शीर्षक'); var expected = Buffer([0x17, 0xb8, 0xaf, 0xf1]); t.same(crc32(input), expected); t.end(); }); test('casts to buffer if necessary', function (t) { var input = 'शीर्षक'; var expected = Buffer([0x17, 0xb8, 0xaf, 0xf1]); t.same(crc32(input), expected); t.end(); }); test('can do signed', function (t) { var input = 'ham sandwich'; var expected = -1891873021; t.same(crc32.signed(input), expected); t.end(); }); test('can do unsigned', function (t) { var input = 'bear sandwich'; var expected = 3711466352; t.same(crc32.unsigned(input), expected); t.end(); }); test('simple crc32 in append mode', function (t) { var input = [Buffer('hey'), Buffer(' '), Buffer('sup'), Buffer(' '), Buffer('bros')]; var expected = Buffer([0x47, 0xfa, 0x55, 0x70]); for (var crc = 0, i = 0; i < input.length; i++) { crc = crc32(input[i], crc); } t.same(crc, expected); t.end(); }); test('can do signed in append mode', function (t) { var input1 = 'ham'; var input2 = ' '; var input3 = 'sandwich'; var expected = -1891873021; var crc = crc32.signed(input1); crc = crc32.signed(input2, crc); crc = crc32.signed(input3, crc); t.same(crc, expected); t.end(); }); test('can do unsigned in append mode', function (t) { var input1 = 'bear san'; var input2 = 'dwich'; var expected = 3711466352; var crc = crc32.unsigned(input1); crc = crc32.unsigned(input2, crc); t.same(crc, expected); t.end(); });