pax_global_header00006660000000000000000000000064130147174670014524gustar00rootroot0000000000000052 comment=e9b66c7356f4ea6f7c2f89d51160a1ef6117849f buffer-crc32-0.2.13/000077500000000000000000000000001301471746700137725ustar00rootroot00000000000000buffer-crc32-0.2.13/.gitignore000066400000000000000000000000141301471746700157550ustar00rootroot00000000000000node_modulesbuffer-crc32-0.2.13/.travis.yml000066400000000000000000000002031301471746700160760ustar00rootroot00000000000000language: node_js node_js: - 0.10 - 0.12 - 4 - 6 notifications: email: recipients: - brianloveswords@gmail.com buffer-crc32-0.2.13/LICENSE000066400000000000000000000020751301471746700150030ustar00rootroot00000000000000The MIT License Copyright (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-crc32-0.2.13/README.md000066400000000000000000000026621301471746700152570ustar00rootroot00000000000000# 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-crc32-0.2.13/index.js000066400000000000000000000106451301471746700154450ustar00rootroot00000000000000var 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 ]; if (typeof Int32Array !== 'undefined') { CRC_TABLE = new Int32Array(CRC_TABLE); } function ensureBuffer(input) { if (Buffer.isBuffer(input)) { return input; } var hasNewBufferAPI = typeof Buffer.alloc === "function" && typeof Buffer.from === "function"; if (typeof input === "number") { return hasNewBufferAPI ? Buffer.alloc(input) : new Buffer(input); } else if (typeof input === "string") { return hasNewBufferAPI ? Buffer.from(input) : new Buffer(input); } else { throw new Error("input must be buffer, number, or string, received " + typeof input); } } function bufferizeInt(num) { var tmp = ensureBuffer(4); tmp.writeInt32BE(num, 0); return tmp; } function _crc32(buf, previous) { buf = ensureBuffer(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-crc32-0.2.13/package.json000066400000000000000000000015741301471746700162670ustar00rootroot00000000000000{ "author": "Brian J. Brennan ", "name": "buffer-crc32", "description": "A pure javascript CRC32 algorithm that plays nice with binary data", "version": "0.2.13", "licenses": [ { "type": "MIT", "url": "https://github.com/brianloveswords/buffer-crc32/raw/master/LICENSE" } ], "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": "*" }, "license": "MIT", "files": [ "index.js" ] } buffer-crc32-0.2.13/tests/000077500000000000000000000000001301471746700151345ustar00rootroot00000000000000buffer-crc32-0.2.13/tests/crc.test.js000066400000000000000000000052051301471746700172210ustar00rootroot00000000000000var crc32 = require('..'); var test = require('tap').test; test('simple crc32 is no problem', function (t) { var input = new Buffer('hey sup bros'); var expected = new Buffer([0x47, 0xfa, 0x55, 0x70]); t.same(crc32(input), expected); t.end(); }); test('another simple one', function (t) { var input = new Buffer('IEND'); var expected = new Buffer([0xae, 0x42, 0x60, 0x82]); t.same(crc32(input), expected); t.end(); }); test('slightly more complex', function (t) { var input = new Buffer([0x00, 0x00, 0x00]); var expected = new Buffer([0xff, 0x41, 0xd9, 0x12]); t.same(crc32(input), expected); t.end(); }); test('complex crc32 gets calculated like a champ', function (t) { var input = new Buffer('शीर्षक'); var expected = new 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 = new 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 = [new Buffer('hey'), new Buffer(' '), new Buffer('sup'), new Buffer(' '), new Buffer('bros')]; var expected = new 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('make sure crc32 can accept integers as first arg ', function (t) { try { t.same(crc32(0), new Buffer([0x00, 0x00, 0x00, 0x00])); } catch (e) { t.fail("should be able to accept integer"); } finally { t.end(); } }); test('make sure crc32 throws on bad input', function (t) { try { crc32({}); t.fail("should fail on garbage input"); } catch (e) { t.ok("should pass"); } finally { 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(); });