[Pkg-javascript-commits] [node-crc] 01/02: Imported Upstream version 3.0.0
Leo Iannacone
l3on-guest at moszumanska.debian.org
Fri Oct 10 13:19:22 UTC 2014
This is an automated email from the git hooks/post-receive script.
l3on-guest pushed a commit to branch master
in repository node-crc.
commit 0ee6535c0a69a8673e898dbb6fe18771de5dfa8c
Author: Leo Iannacone <l3on at ubuntu.com>
Date: Fri Oct 10 14:21:44 2014 +0200
Imported Upstream version 3.0.0
---
.npmignore | 4 ++
.travis.yml | 3 ++
LICENSE | 22 +++++++++++
README.md | 89 +++++++++++++++++++++++++++++++++++++++++++
benchmark/benchmark.coffee | 31 +++++++++++++++
benchmark/crc32-100b.coffee | 15 ++++++++
benchmark/crc32-100kb.coffee | 16 ++++++++
benchmark/crc32-1kb.coffee | 16 ++++++++
benchmark/crc32-1mb.coffee | 16 ++++++++
benchmark/crc32-5kb.coffee | 16 ++++++++
lib/crc.js | 71 ++++++++++++++++++++++++++++++++++
lib/crc1.js | 21 ++++++++++
lib/crc16.js | 25 ++++++++++++
lib/crc16_ccitt.js | 25 ++++++++++++
lib/crc16_modbus.js | 25 ++++++++++++
lib/crc24.js | 25 ++++++++++++
lib/crc32.js | 25 ++++++++++++
lib/crc8.js | 25 ++++++++++++
lib/crc8_1wire.js | 25 ++++++++++++
lib/create.js | 10 +++++
lib/hex.js | 9 +++++
lib/index.js | 11 ++++++
package.json | 34 +++++++++++++++++
src/crc1.coffee | 12 ++++++
src/crc16.coffee | 47 +++++++++++++++++++++++
src/crc16_ccitt.coffee | 47 +++++++++++++++++++++++
src/crc16_modbus.coffee | 47 +++++++++++++++++++++++
src/crc24.coffee | 47 +++++++++++++++++++++++
src/crc32.coffee | 79 ++++++++++++++++++++++++++++++++++++++
src/crc8.coffee | 31 +++++++++++++++
src/crc8_1wire.coffee | 31 +++++++++++++++
src/create.coffee | 6 +++
src/index.coffee | 9 +++++
test/crc1.spec.coffee | 7 ++++
test/crc16.spec.coffee | 7 ++++
test/crc16_ccitt.spec.coffee | 7 ++++
test/crc16_modbus.spec.coffee | 7 ++++
test/crc24.spec.coffee | 7 ++++
test/crc32.spec.coffee | 13 +++++++
test/crc8.spec.coffee | 7 ++++
test/crc8_1wire.spec.coffee | 7 ++++
test/mocha.opts | 5 +++
test/test_helpers.coffee | 21 ++++++++++
43 files changed, 1003 insertions(+)
diff --git a/.npmignore b/.npmignore
new file mode 100644
index 0000000..b84a005
--- /dev/null
+++ b/.npmignore
@@ -0,0 +1,4 @@
+benchmark
+src
+test
+.travis.yml
diff --git a/.travis.yml b/.travis.yml
new file mode 100644
index 0000000..244b7e8
--- /dev/null
+++ b/.travis.yml
@@ -0,0 +1,3 @@
+language: node_js
+node_js:
+ - '0.10'
diff --git a/LICENSE b/LICENSE
new file mode 100644
index 0000000..c49097c
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,22 @@
+The MIT License (MIT)
+
+Copyright 2014 Alex Gorbatchev
+
+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.
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..3fdef99
--- /dev/null
+++ b/README.md
@@ -0,0 +1,89 @@
+# crc
+
+[](https://www.gittip.com/alexgorbatchev/)
+[](https://david-dm.org/alexgorbatchev/node-crc)
+[](https://david-dm.org/alexgorbatchev/node-crc#info=devDependencies)
+[](https://travis-ci.org/alexgorbatchev/node-crc)
+
+[](https://npmjs.org/package/node-crc)
+
+Module for calculating Cyclic Redundancy Check (CRC).
+
+## Features
+
+* Version 3 is 3-4 times faster than version 2.
+* Pure JavaScript implementation, no dependencies.
+* Provides CRC Tables for optimized calculations.
+* Provides support for the following CRC algorithms:
+ * CRC1 `crc.crc1(…)`
+ * CRC8 `crc.crc8(…)`
+ * CRC8 1-Wire `crc.crc81wire(…)`
+ * CRC16 `crc.crc16(…)`
+ * CRC16 CCITT `crc.crc16ccitt(…)`
+ * CRC16 Modbus `crc.crc16modbus(…)`
+ * CRC24 `crc.crc24(…)`
+ * CRC32 `crc.crc32(…)`
+
+## Installation
+
+ npm install crc
+
+## Running tests
+
+ $ npm install
+ $ npm test
+
+## Usage Example
+
+Calculate a CRC32:
+
+ var crc = require('crc');
+
+ crc.crc32('hello').toString(16);
+ # => "3610a686"
+
+Calculate a CRC32 of a file:
+
+ crc.crc32(fs.readFileSync('README.md', 'utf8')).toString(16);
+ # => "127ad531"
+
+Or using a `Buffer`:
+
+ crc.crc32(fs.readFileSync('README.md')).toString(16);
+ # => "127ad531"
+
+Incrementally calculate a CRC32:
+
+ value = crc32('one');
+ value = crc32('two', value);
+ value = crc32('three', value);
+ value.toString(16);
+ # => "09e1c092"
+
+## Thanks!
+
+[pycrc](http://www.tty1.net/pycrc/) library is which the source of all of the CRC tables.
+
+# License
+
+The MIT License (MIT)
+
+Copyright (c) 2014 Alex Gorbatchev
+
+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.
diff --git a/benchmark/benchmark.coffee b/benchmark/benchmark.coffee
new file mode 100644
index 0000000..49f7179
--- /dev/null
+++ b/benchmark/benchmark.coffee
@@ -0,0 +1,31 @@
+benchmark = require 'benchmark'
+benchmarks = require 'beautify-benchmark'
+seedrandom = require 'seedrandom'
+
+getBuffer = (size) ->
+ buffer = new Buffer size
+ rng = seedrandom 'body ' + size
+
+ for i in [0..buffer.length - 1]
+ buffer[i] = (rng() * 94 + 32) | 0
+
+ buffer
+
+global.crc = require '../src'
+global.bufferCRC32 = require 'buffer-crc32'
+
+suite = new benchmark.Suite
+
+suite.on 'start', (e) ->
+ process.stdout.write 'Working...\n\n'
+
+suite.on 'cycle', (e) ->
+ benchmarks.add e.target
+
+suite.on 'complete', ->
+ benchmarks.log()
+
+module.exports =
+ getBuffer: getBuffer
+ add: -> suite.add arguments...
+ run: -> suite.run async: false
diff --git a/benchmark/crc32-100b.coffee b/benchmark/crc32-100b.coffee
new file mode 100644
index 0000000..31cce39
--- /dev/null
+++ b/benchmark/crc32-100b.coffee
@@ -0,0 +1,15 @@
+benchmark = require './benchmark'
+
+global.string = benchmark.getBuffer(100).toString()
+
+benchmark.add
+ minSamples : 100
+ name : 'crc/crc32 100b'
+ fn : 'var val = crc.crc32(string)'
+
+benchmark.add
+ minSamples : 100
+ name : 'buffer-crc32 100b'
+ fn : 'var val = bufferCRC32(string)'
+
+benchmark.run()
diff --git a/benchmark/crc32-100kb.coffee b/benchmark/crc32-100kb.coffee
new file mode 100644
index 0000000..8bc19fb
--- /dev/null
+++ b/benchmark/crc32-100kb.coffee
@@ -0,0 +1,16 @@
+benchmark = require './benchmark'
+
+global.string = benchmark.getBuffer(100 * 1024).toString()
+
+benchmark.add
+ minSamples : 100
+ name : 'crc/crc32 100kb'
+ fn : 'var val = crc.crc32(string)'
+
+benchmark.add
+ minSamples : 100
+ name : 'buffer-crc32 100kb'
+ fn : 'var val = bufferCRC32(string)'
+
+benchmark.run()
+
diff --git a/benchmark/crc32-1kb.coffee b/benchmark/crc32-1kb.coffee
new file mode 100644
index 0000000..9ca4324
--- /dev/null
+++ b/benchmark/crc32-1kb.coffee
@@ -0,0 +1,16 @@
+benchmark = require './benchmark'
+
+global.string = benchmark.getBuffer(1024).toString()
+
+benchmark.add
+ minSamples : 100
+ name : 'crc/crc32 1kb'
+ fn : 'var val = crc.crc32(string)'
+
+benchmark.add
+ minSamples : 100
+ name : 'buffer-crc32 1kb'
+ fn : 'var val = bufferCRC32(string)'
+
+benchmark.run()
+
diff --git a/benchmark/crc32-1mb.coffee b/benchmark/crc32-1mb.coffee
new file mode 100644
index 0000000..928956d
--- /dev/null
+++ b/benchmark/crc32-1mb.coffee
@@ -0,0 +1,16 @@
+benchmark = require './benchmark'
+
+global.string = benchmark.getBuffer(1000 * 1024).toString()
+
+benchmark.add
+ minSamples : 100
+ name : 'crc/crc32 1mb'
+ fn : 'var val = crc.crc32(string)'
+
+benchmark.add
+ minSamples : 100
+ name : 'buffer-crc32 1mb'
+ fn : 'var val = bufferCRC32(string)'
+
+benchmark.run()
+
diff --git a/benchmark/crc32-5kb.coffee b/benchmark/crc32-5kb.coffee
new file mode 100644
index 0000000..c0d9e32
--- /dev/null
+++ b/benchmark/crc32-5kb.coffee
@@ -0,0 +1,16 @@
+benchmark = require './benchmark'
+
+global.string = benchmark.getBuffer(5 * 1024).toString()
+
+benchmark.add
+ minSamples : 100
+ name : 'crc/crc32 5kb'
+ fn : 'var val = crc.crc32(string)'
+
+benchmark.add
+ minSamples : 100
+ name : 'buffer-crc32 5kb'
+ fn : 'var val = bufferCRC32(string)'
+
+benchmark.run()
+
diff --git a/lib/crc.js b/lib/crc.js
new file mode 100644
index 0000000..1c342b7
--- /dev/null
+++ b/lib/crc.js
@@ -0,0 +1,71 @@
+// Generated by CoffeeScript 1.7.1
+var CRC, hex;
+
+hex = require('./hex');
+
+module.exports = CRC = (function() {
+ CRC.prototype.INIT_CRC = 0x00;
+
+ CRC.prototype.XOR_MASK = 0x00;
+
+ CRC.prototype.WIDTH = 0;
+
+ CRC.prototype.pack = function(crc) {
+ return '';
+ };
+
+ CRC.prototype.each_byte = function(buf, cb) {
+ var i, _i, _ref, _results;
+ if (!Buffer.isBuffer(buf)) {
+ buf = Buffer(buf);
+ }
+ _results = [];
+ for (i = _i = 0, _ref = buf.length - 1; 0 <= _ref ? _i <= _ref : _i >= _ref; i = 0 <= _ref ? ++_i : --_i) {
+ _results.push(cb(buf[i]));
+ }
+ return _results;
+ };
+
+ function CRC() {
+ this.crc = this.INIT_CRC;
+ }
+
+ CRC.prototype.digest_length = function() {
+ return Math.ceil(this.WIDTH / 8.0);
+ };
+
+ CRC.prototype.update = function(data) {};
+
+ CRC.prototype.reset = function() {
+ return this.crc = this.INIT_CRC;
+ };
+
+ CRC.prototype.checksum = function(signed) {
+ var sum;
+ if (signed == null) {
+ signed = true;
+ }
+ sum = this.crc ^ this.XOR_MASK;
+ if (signed) {
+ sum = sum >>> 0;
+ }
+ return sum;
+ };
+
+ CRC.prototype.finish = function() {
+ return this.pack(this.checksum());
+ };
+
+ CRC.prototype.hexdigest = function(value) {
+ var result;
+ if (value != null) {
+ this.update(value);
+ }
+ result = this.finish();
+ this.reset();
+ return result;
+ };
+
+ return CRC;
+
+})();
diff --git a/lib/crc1.js b/lib/crc1.js
new file mode 100644
index 0000000..3cb4fa9
--- /dev/null
+++ b/lib/crc1.js
@@ -0,0 +1,21 @@
+// Generated by CoffeeScript 1.7.1
+var Buffer, create;
+
+Buffer = require('buffer').Buffer;
+
+create = require('./create');
+
+module.exports = create(function(buf, previous) {
+ var accum, byte, crc, _i, _len;
+ if (!Buffer.isBuffer(buf)) {
+ buf = Buffer(buf);
+ }
+ crc = ~~previous;
+ accum = 0;
+ for (_i = 0, _len = buf.length; _i < _len; _i++) {
+ byte = buf[_i];
+ accum += byte;
+ }
+ crc += accum % 256;
+ return crc % 256;
+});
diff --git a/lib/crc16.js b/lib/crc16.js
new file mode 100644
index 0000000..f19faa8
--- /dev/null
+++ b/lib/crc16.js
@@ -0,0 +1,25 @@
+// Generated by CoffeeScript 1.7.1
+var Buffer, TABLE, create;
+
+Buffer = require('buffer').Buffer;
+
+create = require('./create');
+
+TABLE = [0x0000, 0xc0c1, 0xc181, 0x0140, 0xc301, 0x03c0, 0x0280, 0xc241, 0xc601, 0x06c0, 0x0780, 0xc741, 0x0500, 0xc5c1, 0xc481, 0x0440, 0xcc01, 0x0cc0, 0x0d80, 0xcd41, 0x0f00, 0xcfc1, 0xce81, 0x0e40, 0x0a00, 0xcac1, 0xcb81, 0x0b40, 0xc901, 0x09c0, 0x0880, 0xc841, 0xd801, 0x18c0, 0x1980, 0xd941, 0x1b00, 0xdbc1, 0xda81, 0x1a40, 0x1e00, 0xdec1, 0xdf81, 0x1f40, 0xdd01, 0x1dc0, 0x1c80, 0xdc41, 0x1400, 0xd4c1, 0xd581, 0x1540, 0xd701, 0x17c0, 0x1680, 0xd641, 0xd201, 0x12c0, 0x1380, 0xd341, 0x1 [...]
+
+if (typeof Int32Array !== 'undefined') {
+ TABLE = new Int32Array(TABLE);
+}
+
+module.exports = create(function(buf, previous) {
+ var byte, crc, _i, _len;
+ if (!Buffer.isBuffer(buf)) {
+ buf = Buffer(buf);
+ }
+ crc = ~~previous;
+ for (_i = 0, _len = buf.length; _i < _len; _i++) {
+ byte = buf[_i];
+ crc = (TABLE[(crc ^ byte) & 0xff] ^ (crc >> 8)) & 0xffff;
+ }
+ return crc;
+});
diff --git a/lib/crc16_ccitt.js b/lib/crc16_ccitt.js
new file mode 100644
index 0000000..5331638
--- /dev/null
+++ b/lib/crc16_ccitt.js
@@ -0,0 +1,25 @@
+// Generated by CoffeeScript 1.7.1
+var Buffer, TABLE, create;
+
+Buffer = require('buffer').Buffer;
+
+create = require('./create');
+
+TABLE = [0x0000, 0x1021, 0x2042, 0x3063, 0x4084, 0x50a5, 0x60c6, 0x70e7, 0x8108, 0x9129, 0xa14a, 0xb16b, 0xc18c, 0xd1ad, 0xe1ce, 0xf1ef, 0x1231, 0x0210, 0x3273, 0x2252, 0x52b5, 0x4294, 0x72f7, 0x62d6, 0x9339, 0x8318, 0xb37b, 0xa35a, 0xd3bd, 0xc39c, 0xf3ff, 0xe3de, 0x2462, 0x3443, 0x0420, 0x1401, 0x64e6, 0x74c7, 0x44a4, 0x5485, 0xa56a, 0xb54b, 0x8528, 0x9509, 0xe5ee, 0xf5cf, 0xc5ac, 0xd58d, 0x3653, 0x2672, 0x1611, 0x0630, 0x76d7, 0x66f6, 0x5695, 0x46b4, 0xb75b, 0xa77a, 0x9719, 0x8738, 0xf [...]
+
+if (typeof Int32Array !== 'undefined') {
+ TABLE = new Int32Array(TABLE);
+}
+
+module.exports = create(function(buf, previous) {
+ var byte, crc, _i, _len;
+ if (!Buffer.isBuffer(buf)) {
+ buf = Buffer(buf);
+ }
+ crc = ~~previous || 0xffff;
+ for (_i = 0, _len = buf.length; _i < _len; _i++) {
+ byte = buf[_i];
+ crc = (TABLE[((crc >> 8) ^ byte) & 0xff] ^ (crc << 8)) & 0xffff;
+ }
+ return crc;
+});
diff --git a/lib/crc16_modbus.js b/lib/crc16_modbus.js
new file mode 100644
index 0000000..dcbd41b
--- /dev/null
+++ b/lib/crc16_modbus.js
@@ -0,0 +1,25 @@
+// Generated by CoffeeScript 1.7.1
+var Buffer, TABLE, create;
+
+Buffer = require('buffer').Buffer;
+
+create = require('./create');
+
+TABLE = [0x0000, 0xc0c1, 0xc181, 0x0140, 0xc301, 0x03c0, 0x0280, 0xc241, 0xc601, 0x06c0, 0x0780, 0xc741, 0x0500, 0xc5c1, 0xc481, 0x0440, 0xcc01, 0x0cc0, 0x0d80, 0xcd41, 0x0f00, 0xcfc1, 0xce81, 0x0e40, 0x0a00, 0xcac1, 0xcb81, 0x0b40, 0xc901, 0x09c0, 0x0880, 0xc841, 0xd801, 0x18c0, 0x1980, 0xd941, 0x1b00, 0xdbc1, 0xda81, 0x1a40, 0x1e00, 0xdec1, 0xdf81, 0x1f40, 0xdd01, 0x1dc0, 0x1c80, 0xdc41, 0x1400, 0xd4c1, 0xd581, 0x1540, 0xd701, 0x17c0, 0x1680, 0xd641, 0xd201, 0x12c0, 0x1380, 0xd341, 0x1 [...]
+
+if (typeof Int32Array !== 'undefined') {
+ TABLE = new Int32Array(TABLE);
+}
+
+module.exports = create(function(buf, previous) {
+ var byte, crc, _i, _len;
+ if (!Buffer.isBuffer(buf)) {
+ buf = Buffer(buf);
+ }
+ crc = ~~previous || 0xffff;
+ for (_i = 0, _len = buf.length; _i < _len; _i++) {
+ byte = buf[_i];
+ crc = (TABLE[(crc ^ byte) & 0xff] ^ (crc >> 8)) & 0xffff;
+ }
+ return crc;
+});
diff --git a/lib/crc24.js b/lib/crc24.js
new file mode 100644
index 0000000..413d159
--- /dev/null
+++ b/lib/crc24.js
@@ -0,0 +1,25 @@
+// Generated by CoffeeScript 1.7.1
+var Buffer, TABLE, create;
+
+Buffer = require('buffer').Buffer;
+
+create = require('./create');
+
+TABLE = [0x000000, 0x864cfb, 0x8ad50d, 0x0c99f6, 0x93e6e1, 0x15aa1a, 0x1933ec, 0x9f7f17, 0xa18139, 0x27cdc2, 0x2b5434, 0xad18cf, 0x3267d8, 0xb42b23, 0xb8b2d5, 0x3efe2e, 0xc54e89, 0x430272, 0x4f9b84, 0xc9d77f, 0x56a868, 0xd0e493, 0xdc7d65, 0x5a319e, 0x64cfb0, 0xe2834b, 0xee1abd, 0x685646, 0xf72951, 0x7165aa, 0x7dfc5c, 0xfbb0a7, 0x0cd1e9, 0x8a9d12, 0x8604e4, 0x00481f, 0x9f3708, 0x197bf3, 0x15e205, 0x93aefe, 0xad50d0, 0x2b1c2b, 0x2785dd, 0xa1c926, 0x3eb631, 0xb8faca, 0xb4633c, 0x322fc7, 0xc [...]
+
+if (typeof Int32Array !== 'undefined') {
+ TABLE = new Int32Array(TABLE);
+}
+
+module.exports = create(function(buf, previous) {
+ var byte, crc, _i, _len;
+ if (!Buffer.isBuffer(buf)) {
+ buf = Buffer(buf);
+ }
+ crc = ~~previous || 0xb704ce;
+ for (_i = 0, _len = buf.length; _i < _len; _i++) {
+ byte = buf[_i];
+ crc = (TABLE[((crc >> 16) ^ byte) & 0xff] ^ (crc << 8)) & 0xffffff;
+ }
+ return crc;
+});
diff --git a/lib/crc32.js b/lib/crc32.js
new file mode 100644
index 0000000..eb2c85e
--- /dev/null
+++ b/lib/crc32.js
@@ -0,0 +1,25 @@
+// Generated by CoffeeScript 1.7.1
+var Buffer, TABLE, create;
+
+Buffer = require('buffer').Buffer;
+
+create = require('./create');
+
+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, 0x3 [...]
+
+if (typeof Int32Array !== 'undefined') {
+ TABLE = new Int32Array(TABLE);
+}
+
+module.exports = create(function(buf, previous) {
+ var byte, crc, _i, _len;
+ if (!Buffer.isBuffer(buf)) {
+ buf = Buffer(buf);
+ }
+ crc = ~~previous ^ -1;
+ for (_i = 0, _len = buf.length; _i < _len; _i++) {
+ byte = buf[_i];
+ crc = TABLE[(crc ^ byte) & 0xff] ^ (crc >>> 8);
+ }
+ return crc ^ -1;
+});
diff --git a/lib/crc8.js b/lib/crc8.js
new file mode 100644
index 0000000..d6518c1
--- /dev/null
+++ b/lib/crc8.js
@@ -0,0 +1,25 @@
+// Generated by CoffeeScript 1.7.1
+var Buffer, TABLE, create;
+
+Buffer = require('buffer').Buffer;
+
+create = require('./create');
+
+TABLE = [0x00, 0x07, 0x0e, 0x09, 0x1c, 0x1b, 0x12, 0x15, 0x38, 0x3f, 0x36, 0x31, 0x24, 0x23, 0x2a, 0x2d, 0x70, 0x77, 0x7e, 0x79, 0x6c, 0x6b, 0x62, 0x65, 0x48, 0x4f, 0x46, 0x41, 0x54, 0x53, 0x5a, 0x5d, 0xe0, 0xe7, 0xee, 0xe9, 0xfc, 0xfb, 0xf2, 0xf5, 0xd8, 0xdf, 0xd6, 0xd1, 0xc4, 0xc3, 0xca, 0xcd, 0x90, 0x97, 0x9e, 0x99, 0x8c, 0x8b, 0x82, 0x85, 0xa8, 0xaf, 0xa6, 0xa1, 0xb4, 0xb3, 0xba, 0xbd, 0xc7, 0xc0, 0xc9, 0xce, 0xdb, 0xdc, 0xd5, 0xd2, 0xff, 0xf8, 0xf1, 0xf6, 0xe3, 0xe4, 0xed, 0xea, 0xb [...]
+
+if (typeof Int32Array !== 'undefined') {
+ TABLE = new Int32Array(TABLE);
+}
+
+module.exports = create(function(buf, previous) {
+ var byte, crc, _i, _len;
+ if (!Buffer.isBuffer(buf)) {
+ buf = Buffer(buf);
+ }
+ crc = ~~previous;
+ for (_i = 0, _len = buf.length; _i < _len; _i++) {
+ byte = buf[_i];
+ crc = (TABLE[(crc ^ byte) & 0xff] ^ (crc << 8)) & 0xff;
+ }
+ return crc;
+});
diff --git a/lib/crc8_1wire.js b/lib/crc8_1wire.js
new file mode 100644
index 0000000..c63a422
--- /dev/null
+++ b/lib/crc8_1wire.js
@@ -0,0 +1,25 @@
+// Generated by CoffeeScript 1.7.1
+var Buffer, TABLE, create;
+
+Buffer = require('buffer').Buffer;
+
+create = require('./create');
+
+TABLE = [0x00, 0x5e, 0xbc, 0xe2, 0x61, 0x3f, 0xdd, 0x83, 0xc2, 0x9c, 0x7e, 0x20, 0xa3, 0xfd, 0x1f, 0x41, 0x9d, 0xc3, 0x21, 0x7f, 0xfc, 0xa2, 0x40, 0x1e, 0x5f, 0x01, 0xe3, 0xbd, 0x3e, 0x60, 0x82, 0xdc, 0x23, 0x7d, 0x9f, 0xc1, 0x42, 0x1c, 0xfe, 0xa0, 0xe1, 0xbf, 0x5d, 0x03, 0x80, 0xde, 0x3c, 0x62, 0xbe, 0xe0, 0x02, 0x5c, 0xdf, 0x81, 0x63, 0x3d, 0x7c, 0x22, 0xc0, 0x9e, 0x1d, 0x43, 0xa1, 0xff, 0x46, 0x18, 0xfa, 0xa4, 0x27, 0x79, 0x9b, 0xc5, 0x84, 0xda, 0x38, 0x66, 0xe5, 0xbb, 0x59, 0x07, 0xd [...]
+
+if (typeof Int32Array !== 'undefined') {
+ TABLE = new Int32Array(TABLE);
+}
+
+module.exports = create(function(buf, previous) {
+ var byte, crc, _i, _len;
+ if (!Buffer.isBuffer(buf)) {
+ buf = Buffer(buf);
+ }
+ crc = ~~previous;
+ for (_i = 0, _len = buf.length; _i < _len; _i++) {
+ byte = buf[_i];
+ crc = (TABLE[(crc ^ byte) & 0xff] ^ (crc << 8)) & 0xff;
+ }
+ return crc;
+});
diff --git a/lib/create.js b/lib/create.js
new file mode 100644
index 0000000..df4d991
--- /dev/null
+++ b/lib/create.js
@@ -0,0 +1,10 @@
+// Generated by CoffeeScript 1.7.1
+module.exports = function(calc) {
+ var fn;
+ fn = function(buf, previous) {
+ return calc(buf, previous) >>> 0;
+ };
+ fn.signed = calc;
+ fn.unsigned = fn;
+ return fn;
+};
diff --git a/lib/hex.js b/lib/hex.js
new file mode 100644
index 0000000..0a6aa4c
--- /dev/null
+++ b/lib/hex.js
@@ -0,0 +1,9 @@
+// Generated by CoffeeScript 1.7.1
+module.exports = function(number) {
+ var result;
+ result = number.toString(16);
+ while (result.length % 2) {
+ result = "0" + result;
+ }
+ return result;
+};
diff --git a/lib/index.js b/lib/index.js
new file mode 100644
index 0000000..15ac34c
--- /dev/null
+++ b/lib/index.js
@@ -0,0 +1,11 @@
+// Generated by CoffeeScript 1.7.1
+module.exports = {
+ crc1: require('./crc1'),
+ crc8: require('./crc8'),
+ crc81wire: require('./crc8_1wire'),
+ crc16: require('./crc16'),
+ crc16ccitt: require('./crc16_ccitt'),
+ crc16modbus: require('./crc16_modbus'),
+ crc24: require('./crc24'),
+ crc32: require('./crc32')
+};
diff --git a/package.json b/package.json
new file mode 100644
index 0000000..808e1c2
--- /dev/null
+++ b/package.json
@@ -0,0 +1,34 @@
+{
+ "name": "crc",
+ "version": "3.0.0",
+ "description": "Various CRC JavaScript implementations",
+ "keywords": [
+ "crc"
+ ],
+ "main": "./lib/index.js",
+ "scripts": {
+ "test": "mocha test/*.spec.coffee",
+ "pretest": "coffee --bare --output ./lib --compile ./src/*.coffee"
+ },
+ "author": {
+ "name": "Alex Gorbatchev",
+ "url": "https://github.com/alexgorbatchev"
+ },
+ "devDependencies": {
+ "beautify-benchmark": "^0.2.4",
+ "benchmark": "^1.0.0",
+ "buffer-crc32": "^0.2.3",
+ "chai": "~1.9.1",
+ "coffee-errors": "~0.8.6",
+ "coffee-script": "~1.7.1",
+ "mocha": "*",
+ "seedrandom": "^2.3.6"
+ },
+ "homepage": "https://github.com/alexgorbatchev/node-crc",
+ "bugs": "https://github.com/alexgorbatchev/node-crc/issues",
+ "repository": {
+ "type": "git",
+ "url": "git://github.com/alexgorbatchev/node-crc.git"
+ },
+ "license": "MIT"
+}
diff --git a/src/crc1.coffee b/src/crc1.coffee
new file mode 100644
index 0000000..9e9893d
--- /dev/null
+++ b/src/crc1.coffee
@@ -0,0 +1,12 @@
+{Buffer} = require 'buffer'
+create = require './create'
+
+module.exports = create (buf, previous) ->
+ buf = Buffer buf unless Buffer.isBuffer buf
+
+ crc = ~~previous
+ accum = 0
+ accum += byte for byte in buf
+ crc += accum % 256
+
+ crc % 256
diff --git a/src/crc16.coffee b/src/crc16.coffee
new file mode 100644
index 0000000..420bd75
--- /dev/null
+++ b/src/crc16.coffee
@@ -0,0 +1,47 @@
+{Buffer} = require 'buffer'
+create = require './create'
+
+# Generated by `./pycrc.py --algorithm=table-driven --model=crc-16`
+TABLE = [
+ 0x0000, 0xc0c1, 0xc181, 0x0140, 0xc301, 0x03c0, 0x0280, 0xc241,
+ 0xc601, 0x06c0, 0x0780, 0xc741, 0x0500, 0xc5c1, 0xc481, 0x0440,
+ 0xcc01, 0x0cc0, 0x0d80, 0xcd41, 0x0f00, 0xcfc1, 0xce81, 0x0e40,
+ 0x0a00, 0xcac1, 0xcb81, 0x0b40, 0xc901, 0x09c0, 0x0880, 0xc841,
+ 0xd801, 0x18c0, 0x1980, 0xd941, 0x1b00, 0xdbc1, 0xda81, 0x1a40,
+ 0x1e00, 0xdec1, 0xdf81, 0x1f40, 0xdd01, 0x1dc0, 0x1c80, 0xdc41,
+ 0x1400, 0xd4c1, 0xd581, 0x1540, 0xd701, 0x17c0, 0x1680, 0xd641,
+ 0xd201, 0x12c0, 0x1380, 0xd341, 0x1100, 0xd1c1, 0xd081, 0x1040,
+ 0xf001, 0x30c0, 0x3180, 0xf141, 0x3300, 0xf3c1, 0xf281, 0x3240,
+ 0x3600, 0xf6c1, 0xf781, 0x3740, 0xf501, 0x35c0, 0x3480, 0xf441,
+ 0x3c00, 0xfcc1, 0xfd81, 0x3d40, 0xff01, 0x3fc0, 0x3e80, 0xfe41,
+ 0xfa01, 0x3ac0, 0x3b80, 0xfb41, 0x3900, 0xf9c1, 0xf881, 0x3840,
+ 0x2800, 0xe8c1, 0xe981, 0x2940, 0xeb01, 0x2bc0, 0x2a80, 0xea41,
+ 0xee01, 0x2ec0, 0x2f80, 0xef41, 0x2d00, 0xedc1, 0xec81, 0x2c40,
+ 0xe401, 0x24c0, 0x2580, 0xe541, 0x2700, 0xe7c1, 0xe681, 0x2640,
+ 0x2200, 0xe2c1, 0xe381, 0x2340, 0xe101, 0x21c0, 0x2080, 0xe041,
+ 0xa001, 0x60c0, 0x6180, 0xa141, 0x6300, 0xa3c1, 0xa281, 0x6240,
+ 0x6600, 0xa6c1, 0xa781, 0x6740, 0xa501, 0x65c0, 0x6480, 0xa441,
+ 0x6c00, 0xacc1, 0xad81, 0x6d40, 0xaf01, 0x6fc0, 0x6e80, 0xae41,
+ 0xaa01, 0x6ac0, 0x6b80, 0xab41, 0x6900, 0xa9c1, 0xa881, 0x6840,
+ 0x7800, 0xb8c1, 0xb981, 0x7940, 0xbb01, 0x7bc0, 0x7a80, 0xba41,
+ 0xbe01, 0x7ec0, 0x7f80, 0xbf41, 0x7d00, 0xbdc1, 0xbc81, 0x7c40,
+ 0xb401, 0x74c0, 0x7580, 0xb541, 0x7700, 0xb7c1, 0xb681, 0x7640,
+ 0x7200, 0xb2c1, 0xb381, 0x7340, 0xb101, 0x71c0, 0x7080, 0xb041,
+ 0x5000, 0x90c1, 0x9181, 0x5140, 0x9301, 0x53c0, 0x5280, 0x9241,
+ 0x9601, 0x56c0, 0x5780, 0x9741, 0x5500, 0x95c1, 0x9481, 0x5440,
+ 0x9c01, 0x5cc0, 0x5d80, 0x9d41, 0x5f00, 0x9fc1, 0x9e81, 0x5e40,
+ 0x5a00, 0x9ac1, 0x9b81, 0x5b40, 0x9901, 0x59c0, 0x5880, 0x9841,
+ 0x8801, 0x48c0, 0x4980, 0x8941, 0x4b00, 0x8bc1, 0x8a81, 0x4a40,
+ 0x4e00, 0x8ec1, 0x8f81, 0x4f40, 0x8d01, 0x4dc0, 0x4c80, 0x8c41,
+ 0x4400, 0x84c1, 0x8581, 0x4540, 0x8701, 0x47c0, 0x4680, 0x8641,
+ 0x8201, 0x42c0, 0x4380, 0x8341, 0x4100, 0x81c1, 0x8081, 0x4040
+]
+
+TABLE = new Int32Array TABLE if typeof Int32Array isnt 'undefined'
+
+module.exports = create (buf, previous) ->
+ buf = Buffer buf unless Buffer.isBuffer buf
+
+ crc = ~~previous
+ crc = ((TABLE[(crc ^ byte) & 0xff] ^ (crc >> 8)) & 0xffff) for byte in buf
+ crc
diff --git a/src/crc16_ccitt.coffee b/src/crc16_ccitt.coffee
new file mode 100644
index 0000000..0546b1a
--- /dev/null
+++ b/src/crc16_ccitt.coffee
@@ -0,0 +1,47 @@
+{Buffer} = require 'buffer'
+create = require './create'
+
+# Generated by `./pycrc.py --algorithm=table-driven --model=ccitt --generate=c`
+TABLE = [
+ 0x0000, 0x1021, 0x2042, 0x3063, 0x4084, 0x50a5, 0x60c6, 0x70e7,
+ 0x8108, 0x9129, 0xa14a, 0xb16b, 0xc18c, 0xd1ad, 0xe1ce, 0xf1ef,
+ 0x1231, 0x0210, 0x3273, 0x2252, 0x52b5, 0x4294, 0x72f7, 0x62d6,
+ 0x9339, 0x8318, 0xb37b, 0xa35a, 0xd3bd, 0xc39c, 0xf3ff, 0xe3de,
+ 0x2462, 0x3443, 0x0420, 0x1401, 0x64e6, 0x74c7, 0x44a4, 0x5485,
+ 0xa56a, 0xb54b, 0x8528, 0x9509, 0xe5ee, 0xf5cf, 0xc5ac, 0xd58d,
+ 0x3653, 0x2672, 0x1611, 0x0630, 0x76d7, 0x66f6, 0x5695, 0x46b4,
+ 0xb75b, 0xa77a, 0x9719, 0x8738, 0xf7df, 0xe7fe, 0xd79d, 0xc7bc,
+ 0x48c4, 0x58e5, 0x6886, 0x78a7, 0x0840, 0x1861, 0x2802, 0x3823,
+ 0xc9cc, 0xd9ed, 0xe98e, 0xf9af, 0x8948, 0x9969, 0xa90a, 0xb92b,
+ 0x5af5, 0x4ad4, 0x7ab7, 0x6a96, 0x1a71, 0x0a50, 0x3a33, 0x2a12,
+ 0xdbfd, 0xcbdc, 0xfbbf, 0xeb9e, 0x9b79, 0x8b58, 0xbb3b, 0xab1a,
+ 0x6ca6, 0x7c87, 0x4ce4, 0x5cc5, 0x2c22, 0x3c03, 0x0c60, 0x1c41,
+ 0xedae, 0xfd8f, 0xcdec, 0xddcd, 0xad2a, 0xbd0b, 0x8d68, 0x9d49,
+ 0x7e97, 0x6eb6, 0x5ed5, 0x4ef4, 0x3e13, 0x2e32, 0x1e51, 0x0e70,
+ 0xff9f, 0xefbe, 0xdfdd, 0xcffc, 0xbf1b, 0xaf3a, 0x9f59, 0x8f78,
+ 0x9188, 0x81a9, 0xb1ca, 0xa1eb, 0xd10c, 0xc12d, 0xf14e, 0xe16f,
+ 0x1080, 0x00a1, 0x30c2, 0x20e3, 0x5004, 0x4025, 0x7046, 0x6067,
+ 0x83b9, 0x9398, 0xa3fb, 0xb3da, 0xc33d, 0xd31c, 0xe37f, 0xf35e,
+ 0x02b1, 0x1290, 0x22f3, 0x32d2, 0x4235, 0x5214, 0x6277, 0x7256,
+ 0xb5ea, 0xa5cb, 0x95a8, 0x8589, 0xf56e, 0xe54f, 0xd52c, 0xc50d,
+ 0x34e2, 0x24c3, 0x14a0, 0x0481, 0x7466, 0x6447, 0x5424, 0x4405,
+ 0xa7db, 0xb7fa, 0x8799, 0x97b8, 0xe75f, 0xf77e, 0xc71d, 0xd73c,
+ 0x26d3, 0x36f2, 0x0691, 0x16b0, 0x6657, 0x7676, 0x4615, 0x5634,
+ 0xd94c, 0xc96d, 0xf90e, 0xe92f, 0x99c8, 0x89e9, 0xb98a, 0xa9ab,
+ 0x5844, 0x4865, 0x7806, 0x6827, 0x18c0, 0x08e1, 0x3882, 0x28a3,
+ 0xcb7d, 0xdb5c, 0xeb3f, 0xfb1e, 0x8bf9, 0x9bd8, 0xabbb, 0xbb9a,
+ 0x4a75, 0x5a54, 0x6a37, 0x7a16, 0x0af1, 0x1ad0, 0x2ab3, 0x3a92,
+ 0xfd2e, 0xed0f, 0xdd6c, 0xcd4d, 0xbdaa, 0xad8b, 0x9de8, 0x8dc9,
+ 0x7c26, 0x6c07, 0x5c64, 0x4c45, 0x3ca2, 0x2c83, 0x1ce0, 0x0cc1,
+ 0xef1f, 0xff3e, 0xcf5d, 0xdf7c, 0xaf9b, 0xbfba, 0x8fd9, 0x9ff8,
+ 0x6e17, 0x7e36, 0x4e55, 0x5e74, 0x2e93, 0x3eb2, 0x0ed1, 0x1ef0
+]
+
+TABLE = new Int32Array TABLE if typeof Int32Array isnt 'undefined'
+
+module.exports = create (buf, previous) ->
+ buf = Buffer buf unless Buffer.isBuffer buf
+
+ crc = ~~previous || 0xffff
+ crc = ((TABLE[((crc >> 8) ^ byte) & 0xff] ^ (crc << 8)) & 0xffff) for byte in buf
+ crc
diff --git a/src/crc16_modbus.coffee b/src/crc16_modbus.coffee
new file mode 100644
index 0000000..72ac7e8
--- /dev/null
+++ b/src/crc16_modbus.coffee
@@ -0,0 +1,47 @@
+{Buffer} = require 'buffer'
+create = require './create'
+
+# Generated by `./pycrc.py --algorithm=table-driven --model=crc-16-modbus --generate=c`
+TABLE = [
+ 0x0000, 0xc0c1, 0xc181, 0x0140, 0xc301, 0x03c0, 0x0280, 0xc241,
+ 0xc601, 0x06c0, 0x0780, 0xc741, 0x0500, 0xc5c1, 0xc481, 0x0440,
+ 0xcc01, 0x0cc0, 0x0d80, 0xcd41, 0x0f00, 0xcfc1, 0xce81, 0x0e40,
+ 0x0a00, 0xcac1, 0xcb81, 0x0b40, 0xc901, 0x09c0, 0x0880, 0xc841,
+ 0xd801, 0x18c0, 0x1980, 0xd941, 0x1b00, 0xdbc1, 0xda81, 0x1a40,
+ 0x1e00, 0xdec1, 0xdf81, 0x1f40, 0xdd01, 0x1dc0, 0x1c80, 0xdc41,
+ 0x1400, 0xd4c1, 0xd581, 0x1540, 0xd701, 0x17c0, 0x1680, 0xd641,
+ 0xd201, 0x12c0, 0x1380, 0xd341, 0x1100, 0xd1c1, 0xd081, 0x1040,
+ 0xf001, 0x30c0, 0x3180, 0xf141, 0x3300, 0xf3c1, 0xf281, 0x3240,
+ 0x3600, 0xf6c1, 0xf781, 0x3740, 0xf501, 0x35c0, 0x3480, 0xf441,
+ 0x3c00, 0xfcc1, 0xfd81, 0x3d40, 0xff01, 0x3fc0, 0x3e80, 0xfe41,
+ 0xfa01, 0x3ac0, 0x3b80, 0xfb41, 0x3900, 0xf9c1, 0xf881, 0x3840,
+ 0x2800, 0xe8c1, 0xe981, 0x2940, 0xeb01, 0x2bc0, 0x2a80, 0xea41,
+ 0xee01, 0x2ec0, 0x2f80, 0xef41, 0x2d00, 0xedc1, 0xec81, 0x2c40,
+ 0xe401, 0x24c0, 0x2580, 0xe541, 0x2700, 0xe7c1, 0xe681, 0x2640,
+ 0x2200, 0xe2c1, 0xe381, 0x2340, 0xe101, 0x21c0, 0x2080, 0xe041,
+ 0xa001, 0x60c0, 0x6180, 0xa141, 0x6300, 0xa3c1, 0xa281, 0x6240,
+ 0x6600, 0xa6c1, 0xa781, 0x6740, 0xa501, 0x65c0, 0x6480, 0xa441,
+ 0x6c00, 0xacc1, 0xad81, 0x6d40, 0xaf01, 0x6fc0, 0x6e80, 0xae41,
+ 0xaa01, 0x6ac0, 0x6b80, 0xab41, 0x6900, 0xa9c1, 0xa881, 0x6840,
+ 0x7800, 0xb8c1, 0xb981, 0x7940, 0xbb01, 0x7bc0, 0x7a80, 0xba41,
+ 0xbe01, 0x7ec0, 0x7f80, 0xbf41, 0x7d00, 0xbdc1, 0xbc81, 0x7c40,
+ 0xb401, 0x74c0, 0x7580, 0xb541, 0x7700, 0xb7c1, 0xb681, 0x7640,
+ 0x7200, 0xb2c1, 0xb381, 0x7340, 0xb101, 0x71c0, 0x7080, 0xb041,
+ 0x5000, 0x90c1, 0x9181, 0x5140, 0x9301, 0x53c0, 0x5280, 0x9241,
+ 0x9601, 0x56c0, 0x5780, 0x9741, 0x5500, 0x95c1, 0x9481, 0x5440,
+ 0x9c01, 0x5cc0, 0x5d80, 0x9d41, 0x5f00, 0x9fc1, 0x9e81, 0x5e40,
+ 0x5a00, 0x9ac1, 0x9b81, 0x5b40, 0x9901, 0x59c0, 0x5880, 0x9841,
+ 0x8801, 0x48c0, 0x4980, 0x8941, 0x4b00, 0x8bc1, 0x8a81, 0x4a40,
+ 0x4e00, 0x8ec1, 0x8f81, 0x4f40, 0x8d01, 0x4dc0, 0x4c80, 0x8c41,
+ 0x4400, 0x84c1, 0x8581, 0x4540, 0x8701, 0x47c0, 0x4680, 0x8641,
+ 0x8201, 0x42c0, 0x4380, 0x8341, 0x4100, 0x81c1, 0x8081, 0x4040
+]
+
+TABLE = new Int32Array TABLE if typeof Int32Array isnt 'undefined'
+
+module.exports = create (buf, previous) ->
+ buf = Buffer buf unless Buffer.isBuffer buf
+
+ crc = ~~previous || 0xffff
+ crc = ((TABLE[(crc ^ byte) & 0xff] ^ (crc >> 8)) & 0xffff) for byte in buf
+ crc
diff --git a/src/crc24.coffee b/src/crc24.coffee
new file mode 100644
index 0000000..3cb7eda
--- /dev/null
+++ b/src/crc24.coffee
@@ -0,0 +1,47 @@
+{Buffer} = require 'buffer'
+create = require './create'
+
+# Generated by `./pycrc.py --algorithm=table-drive --model=crc24 --generate=c`
+TABLE = [
+ 0x000000, 0x864cfb, 0x8ad50d, 0x0c99f6, 0x93e6e1, 0x15aa1a, 0x1933ec, 0x9f7f17,
+ 0xa18139, 0x27cdc2, 0x2b5434, 0xad18cf, 0x3267d8, 0xb42b23, 0xb8b2d5, 0x3efe2e,
+ 0xc54e89, 0x430272, 0x4f9b84, 0xc9d77f, 0x56a868, 0xd0e493, 0xdc7d65, 0x5a319e,
+ 0x64cfb0, 0xe2834b, 0xee1abd, 0x685646, 0xf72951, 0x7165aa, 0x7dfc5c, 0xfbb0a7,
+ 0x0cd1e9, 0x8a9d12, 0x8604e4, 0x00481f, 0x9f3708, 0x197bf3, 0x15e205, 0x93aefe,
+ 0xad50d0, 0x2b1c2b, 0x2785dd, 0xa1c926, 0x3eb631, 0xb8faca, 0xb4633c, 0x322fc7,
+ 0xc99f60, 0x4fd39b, 0x434a6d, 0xc50696, 0x5a7981, 0xdc357a, 0xd0ac8c, 0x56e077,
+ 0x681e59, 0xee52a2, 0xe2cb54, 0x6487af, 0xfbf8b8, 0x7db443, 0x712db5, 0xf7614e,
+ 0x19a3d2, 0x9fef29, 0x9376df, 0x153a24, 0x8a4533, 0x0c09c8, 0x00903e, 0x86dcc5,
+ 0xb822eb, 0x3e6e10, 0x32f7e6, 0xb4bb1d, 0x2bc40a, 0xad88f1, 0xa11107, 0x275dfc,
+ 0xdced5b, 0x5aa1a0, 0x563856, 0xd074ad, 0x4f0bba, 0xc94741, 0xc5deb7, 0x43924c,
+ 0x7d6c62, 0xfb2099, 0xf7b96f, 0x71f594, 0xee8a83, 0x68c678, 0x645f8e, 0xe21375,
+ 0x15723b, 0x933ec0, 0x9fa736, 0x19ebcd, 0x8694da, 0x00d821, 0x0c41d7, 0x8a0d2c,
+ 0xb4f302, 0x32bff9, 0x3e260f, 0xb86af4, 0x2715e3, 0xa15918, 0xadc0ee, 0x2b8c15,
+ 0xd03cb2, 0x567049, 0x5ae9bf, 0xdca544, 0x43da53, 0xc596a8, 0xc90f5e, 0x4f43a5,
+ 0x71bd8b, 0xf7f170, 0xfb6886, 0x7d247d, 0xe25b6a, 0x641791, 0x688e67, 0xeec29c,
+ 0x3347a4, 0xb50b5f, 0xb992a9, 0x3fde52, 0xa0a145, 0x26edbe, 0x2a7448, 0xac38b3,
+ 0x92c69d, 0x148a66, 0x181390, 0x9e5f6b, 0x01207c, 0x876c87, 0x8bf571, 0x0db98a,
+ 0xf6092d, 0x7045d6, 0x7cdc20, 0xfa90db, 0x65efcc, 0xe3a337, 0xef3ac1, 0x69763a,
+ 0x578814, 0xd1c4ef, 0xdd5d19, 0x5b11e2, 0xc46ef5, 0x42220e, 0x4ebbf8, 0xc8f703,
+ 0x3f964d, 0xb9dab6, 0xb54340, 0x330fbb, 0xac70ac, 0x2a3c57, 0x26a5a1, 0xa0e95a,
+ 0x9e1774, 0x185b8f, 0x14c279, 0x928e82, 0x0df195, 0x8bbd6e, 0x872498, 0x016863,
+ 0xfad8c4, 0x7c943f, 0x700dc9, 0xf64132, 0x693e25, 0xef72de, 0xe3eb28, 0x65a7d3,
+ 0x5b59fd, 0xdd1506, 0xd18cf0, 0x57c00b, 0xc8bf1c, 0x4ef3e7, 0x426a11, 0xc426ea,
+ 0x2ae476, 0xaca88d, 0xa0317b, 0x267d80, 0xb90297, 0x3f4e6c, 0x33d79a, 0xb59b61,
+ 0x8b654f, 0x0d29b4, 0x01b042, 0x87fcb9, 0x1883ae, 0x9ecf55, 0x9256a3, 0x141a58,
+ 0xefaaff, 0x69e604, 0x657ff2, 0xe33309, 0x7c4c1e, 0xfa00e5, 0xf69913, 0x70d5e8,
+ 0x4e2bc6, 0xc8673d, 0xc4fecb, 0x42b230, 0xddcd27, 0x5b81dc, 0x57182a, 0xd154d1,
+ 0x26359f, 0xa07964, 0xace092, 0x2aac69, 0xb5d37e, 0x339f85, 0x3f0673, 0xb94a88,
+ 0x87b4a6, 0x01f85d, 0x0d61ab, 0x8b2d50, 0x145247, 0x921ebc, 0x9e874a, 0x18cbb1,
+ 0xe37b16, 0x6537ed, 0x69ae1b, 0xefe2e0, 0x709df7, 0xf6d10c, 0xfa48fa, 0x7c0401,
+ 0x42fa2f, 0xc4b6d4, 0xc82f22, 0x4e63d9, 0xd11cce, 0x575035, 0x5bc9c3, 0xdd8538
+]
+
+TABLE = new Int32Array TABLE if typeof Int32Array isnt 'undefined'
+
+module.exports = create (buf, previous) ->
+ buf = Buffer buf unless Buffer.isBuffer buf
+
+ crc = ~~previous || 0xb704ce
+ crc = ((TABLE[((crc >> 16) ^ byte) & 0xff] ^ (crc << 8)) & 0xffffff) for byte in buf
+ crc
diff --git a/src/crc32.coffee b/src/crc32.coffee
new file mode 100644
index 0000000..4bfb6a8
--- /dev/null
+++ b/src/crc32.coffee
@@ -0,0 +1,79 @@
+{Buffer} = require 'buffer'
+create = require './create'
+
+# Generated by `./pycrc.py --algorithm=table-driven --model=crc-32 --generate=c`
+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
+]
+
+TABLE = new Int32Array TABLE if typeof Int32Array isnt 'undefined'
+
+module.exports = create (buf, previous) ->
+ buf = Buffer buf unless Buffer.isBuffer buf
+
+ crc = ~~previous ^ -1
+ crc = TABLE[(crc ^ byte) & 0xff] ^ (crc >>> 8) for byte in buf
+ crc ^ -1
diff --git a/src/crc8.coffee b/src/crc8.coffee
new file mode 100644
index 0000000..a853c82
--- /dev/null
+++ b/src/crc8.coffee
@@ -0,0 +1,31 @@
+{Buffer} = require 'buffer'
+create = require './create'
+
+# Generated by `./pycrc.py --algorithm=table-driven --model=crc-8 --generate=c`
+TABLE = [
+ 0x00, 0x07, 0x0e, 0x09, 0x1c, 0x1b, 0x12, 0x15, 0x38, 0x3f, 0x36, 0x31, 0x24, 0x23, 0x2a, 0x2d,
+ 0x70, 0x77, 0x7e, 0x79, 0x6c, 0x6b, 0x62, 0x65, 0x48, 0x4f, 0x46, 0x41, 0x54, 0x53, 0x5a, 0x5d,
+ 0xe0, 0xe7, 0xee, 0xe9, 0xfc, 0xfb, 0xf2, 0xf5, 0xd8, 0xdf, 0xd6, 0xd1, 0xc4, 0xc3, 0xca, 0xcd,
+ 0x90, 0x97, 0x9e, 0x99, 0x8c, 0x8b, 0x82, 0x85, 0xa8, 0xaf, 0xa6, 0xa1, 0xb4, 0xb3, 0xba, 0xbd,
+ 0xc7, 0xc0, 0xc9, 0xce, 0xdb, 0xdc, 0xd5, 0xd2, 0xff, 0xf8, 0xf1, 0xf6, 0xe3, 0xe4, 0xed, 0xea,
+ 0xb7, 0xb0, 0xb9, 0xbe, 0xab, 0xac, 0xa5, 0xa2, 0x8f, 0x88, 0x81, 0x86, 0x93, 0x94, 0x9d, 0x9a,
+ 0x27, 0x20, 0x29, 0x2e, 0x3b, 0x3c, 0x35, 0x32, 0x1f, 0x18, 0x11, 0x16, 0x03, 0x04, 0x0d, 0x0a,
+ 0x57, 0x50, 0x59, 0x5e, 0x4b, 0x4c, 0x45, 0x42, 0x6f, 0x68, 0x61, 0x66, 0x73, 0x74, 0x7d, 0x7a,
+ 0x89, 0x8e, 0x87, 0x80, 0x95, 0x92, 0x9b, 0x9c, 0xb1, 0xb6, 0xbf, 0xb8, 0xad, 0xaa, 0xa3, 0xa4,
+ 0xf9, 0xfe, 0xf7, 0xf0, 0xe5, 0xe2, 0xeb, 0xec, 0xc1, 0xc6, 0xcf, 0xc8, 0xdd, 0xda, 0xd3, 0xd4,
+ 0x69, 0x6e, 0x67, 0x60, 0x75, 0x72, 0x7b, 0x7c, 0x51, 0x56, 0x5f, 0x58, 0x4d, 0x4a, 0x43, 0x44,
+ 0x19, 0x1e, 0x17, 0x10, 0x05, 0x02, 0x0b, 0x0c, 0x21, 0x26, 0x2f, 0x28, 0x3d, 0x3a, 0x33, 0x34,
+ 0x4e, 0x49, 0x40, 0x47, 0x52, 0x55, 0x5c, 0x5b, 0x76, 0x71, 0x78, 0x7f, 0x6a, 0x6d, 0x64, 0x63,
+ 0x3e, 0x39, 0x30, 0x37, 0x22, 0x25, 0x2c, 0x2b, 0x06, 0x01, 0x08, 0x0f, 0x1a, 0x1d, 0x14, 0x13,
+ 0xae, 0xa9, 0xa0, 0xa7, 0xb2, 0xb5, 0xbc, 0xbb, 0x96, 0x91, 0x98, 0x9f, 0x8a, 0x8d, 0x84, 0x83,
+ 0xde, 0xd9, 0xd0, 0xd7, 0xc2, 0xc5, 0xcc, 0xcb, 0xe6, 0xe1, 0xe8, 0xef, 0xfa, 0xfd, 0xf4, 0xf3
+]
+
+TABLE = new Int32Array TABLE if typeof Int32Array isnt 'undefined'
+
+module.exports = create (buf, previous) ->
+ buf = Buffer buf unless Buffer.isBuffer buf
+
+ crc = ~~previous
+ crc = ((TABLE[(crc ^ byte) & 0xff] ^ (crc << 8)) & 0xff) for byte in buf
+ crc
diff --git a/src/crc8_1wire.coffee b/src/crc8_1wire.coffee
new file mode 100644
index 0000000..43e68b1
--- /dev/null
+++ b/src/crc8_1wire.coffee
@@ -0,0 +1,31 @@
+{Buffer} = require 'buffer'
+create = require './create'
+
+# Generated by `./pycrc.py --algorithm=table-driven --model=dallas-1-wire --generate=c`
+TABLE = [
+ 0x00, 0x5e, 0xbc, 0xe2, 0x61, 0x3f, 0xdd, 0x83, 0xc2, 0x9c, 0x7e, 0x20, 0xa3, 0xfd, 0x1f, 0x41,
+ 0x9d, 0xc3, 0x21, 0x7f, 0xfc, 0xa2, 0x40, 0x1e, 0x5f, 0x01, 0xe3, 0xbd, 0x3e, 0x60, 0x82, 0xdc,
+ 0x23, 0x7d, 0x9f, 0xc1, 0x42, 0x1c, 0xfe, 0xa0, 0xe1, 0xbf, 0x5d, 0x03, 0x80, 0xde, 0x3c, 0x62,
+ 0xbe, 0xe0, 0x02, 0x5c, 0xdf, 0x81, 0x63, 0x3d, 0x7c, 0x22, 0xc0, 0x9e, 0x1d, 0x43, 0xa1, 0xff,
+ 0x46, 0x18, 0xfa, 0xa4, 0x27, 0x79, 0x9b, 0xc5, 0x84, 0xda, 0x38, 0x66, 0xe5, 0xbb, 0x59, 0x07,
+ 0xdb, 0x85, 0x67, 0x39, 0xba, 0xe4, 0x06, 0x58, 0x19, 0x47, 0xa5, 0xfb, 0x78, 0x26, 0xc4, 0x9a,
+ 0x65, 0x3b, 0xd9, 0x87, 0x04, 0x5a, 0xb8, 0xe6, 0xa7, 0xf9, 0x1b, 0x45, 0xc6, 0x98, 0x7a, 0x24,
+ 0xf8, 0xa6, 0x44, 0x1a, 0x99, 0xc7, 0x25, 0x7b, 0x3a, 0x64, 0x86, 0xd8, 0x5b, 0x05, 0xe7, 0xb9,
+ 0x8c, 0xd2, 0x30, 0x6e, 0xed, 0xb3, 0x51, 0x0f, 0x4e, 0x10, 0xf2, 0xac, 0x2f, 0x71, 0x93, 0xcd,
+ 0x11, 0x4f, 0xad, 0xf3, 0x70, 0x2e, 0xcc, 0x92, 0xd3, 0x8d, 0x6f, 0x31, 0xb2, 0xec, 0x0e, 0x50,
+ 0xaf, 0xf1, 0x13, 0x4d, 0xce, 0x90, 0x72, 0x2c, 0x6d, 0x33, 0xd1, 0x8f, 0x0c, 0x52, 0xb0, 0xee,
+ 0x32, 0x6c, 0x8e, 0xd0, 0x53, 0x0d, 0xef, 0xb1, 0xf0, 0xae, 0x4c, 0x12, 0x91, 0xcf, 0x2d, 0x73,
+ 0xca, 0x94, 0x76, 0x28, 0xab, 0xf5, 0x17, 0x49, 0x08, 0x56, 0xb4, 0xea, 0x69, 0x37, 0xd5, 0x8b,
+ 0x57, 0x09, 0xeb, 0xb5, 0x36, 0x68, 0x8a, 0xd4, 0x95, 0xcb, 0x29, 0x77, 0xf4, 0xaa, 0x48, 0x16,
+ 0xe9, 0xb7, 0x55, 0x0b, 0x88, 0xd6, 0x34, 0x6a, 0x2b, 0x75, 0x97, 0xc9, 0x4a, 0x14, 0xf6, 0xa8,
+ 0x74, 0x2a, 0xc8, 0x96, 0x15, 0x4b, 0xa9, 0xf7, 0xb6, 0xe8, 0x0a, 0x54, 0xd7, 0x89, 0x6b, 0x35
+]
+
+TABLE = new Int32Array TABLE if typeof Int32Array isnt 'undefined'
+
+module.exports = create (buf, previous) ->
+ buf = Buffer buf unless Buffer.isBuffer buf
+
+ crc = ~~previous
+ crc = ((TABLE[(crc ^ byte) & 0xff] ^ (crc << 8)) & 0xff) for byte in buf
+ crc
diff --git a/src/create.coffee b/src/create.coffee
new file mode 100644
index 0000000..ebfc51b
--- /dev/null
+++ b/src/create.coffee
@@ -0,0 +1,6 @@
+module.exports = (calc) ->
+ fn = (buf, previous) -> calc(buf, previous) >>> 0
+ fn.signed = calc
+ fn.unsigned = fn
+
+ fn
diff --git a/src/index.coffee b/src/index.coffee
new file mode 100644
index 0000000..ea74bc5
--- /dev/null
+++ b/src/index.coffee
@@ -0,0 +1,9 @@
+module.exports =
+ crc1 : require './crc1'
+ crc8 : require './crc8'
+ crc81wire : require './crc8_1wire'
+ crc16 : require './crc16'
+ crc16ccitt : require './crc16_ccitt'
+ crc16modbus : require './crc16_modbus'
+ crc24 : require './crc24'
+ crc32 : require './crc32'
diff --git a/test/crc1.spec.coffee b/test/crc1.spec.coffee
new file mode 100644
index 0000000..14ce51c
--- /dev/null
+++ b/test/crc1.spec.coffee
@@ -0,0 +1,7 @@
+require './test_helpers'
+
+describe 'CRC1', ->
+ example
+ crc: require '../src/crc1'
+ string: '1234567890'
+ expected: 'd'
diff --git a/test/crc16.spec.coffee b/test/crc16.spec.coffee
new file mode 100644
index 0000000..321a0aa
--- /dev/null
+++ b/test/crc16.spec.coffee
@@ -0,0 +1,7 @@
+require './test_helpers'
+
+describe 'CRC16', ->
+ example
+ crc: require '../src/crc16'
+ string: '1234567890'
+ expected: 'c57a'
diff --git a/test/crc16_ccitt.spec.coffee b/test/crc16_ccitt.spec.coffee
new file mode 100644
index 0000000..7e5b7ca
--- /dev/null
+++ b/test/crc16_ccitt.spec.coffee
@@ -0,0 +1,7 @@
+require './test_helpers'
+
+describe 'CRC16CCITT', ->
+ example
+ crc: require '../src/crc16_ccitt'
+ string: '1234567890'
+ expected: '3218'
diff --git a/test/crc16_modbus.spec.coffee b/test/crc16_modbus.spec.coffee
new file mode 100644
index 0000000..7ad92e8
--- /dev/null
+++ b/test/crc16_modbus.spec.coffee
@@ -0,0 +1,7 @@
+require './test_helpers'
+
+describe 'CRC16Modbus', ->
+ example
+ crc: require '../src/crc16_modbus'
+ string: '1234567890'
+ expected: 'c20a'
diff --git a/test/crc24.spec.coffee b/test/crc24.spec.coffee
new file mode 100644
index 0000000..e4bb3f3
--- /dev/null
+++ b/test/crc24.spec.coffee
@@ -0,0 +1,7 @@
+require './test_helpers'
+
+describe 'CRC24', ->
+ example
+ crc: require '../src/crc24'
+ string: '1234567890'
+ expected: '8c0072'
diff --git a/test/crc32.spec.coffee b/test/crc32.spec.coffee
new file mode 100644
index 0000000..2efe678
--- /dev/null
+++ b/test/crc32.spec.coffee
@@ -0,0 +1,13 @@
+require './test_helpers'
+crc = require '../src/crc32'
+
+describe 'CRC32', ->
+ example
+ crc: crc
+ string: '1234567890'
+ expected: '261daee5'
+
+ example
+ crc: crc
+ string: 'Hello, world'
+ expected: 'e79aa9c2'
diff --git a/test/crc8.spec.coffee b/test/crc8.spec.coffee
new file mode 100644
index 0000000..b75478f
--- /dev/null
+++ b/test/crc8.spec.coffee
@@ -0,0 +1,7 @@
+require './test_helpers'
+
+describe 'CRC8', ->
+ example
+ crc: require '../src/crc8'
+ string: '1234567890'
+ expected: '52'
diff --git a/test/crc8_1wire.spec.coffee b/test/crc8_1wire.spec.coffee
new file mode 100644
index 0000000..d174f2d
--- /dev/null
+++ b/test/crc8_1wire.spec.coffee
@@ -0,0 +1,7 @@
+require './test_helpers'
+
+describe 'CRC8 1 Wire', ->
+ example
+ crc: require '../src/crc8_1wire'
+ string: '1234567890'
+ expected: '4f'
diff --git a/test/mocha.opts b/test/mocha.opts
new file mode 100644
index 0000000..091b333
--- /dev/null
+++ b/test/mocha.opts
@@ -0,0 +1,5 @@
+--compilers coffee:coffee-script/register
+--recursive
+--reporter spec
+--ui bdd
+--timeout 1000
diff --git a/test/test_helpers.coffee b/test/test_helpers.coffee
new file mode 100644
index 0000000..f30aa6a
--- /dev/null
+++ b/test/test_helpers.coffee
@@ -0,0 +1,21 @@
+require 'coffee-errors'
+
+path = require 'path'
+chai = require 'chai'
+
+GLOBAL.should = chai.should()
+
+GLOBAL.example = ({crc, string, expected}) ->
+ describe "crc for `#{string}`", ->
+ it 'should calculate a checksum for text', ->
+ crc(string).toString(16).should.equal expected
+
+ it 'should calculate a checksum for multiple data', ->
+ middle = string.length / 2
+ chunk1 = string.substr 0, middle
+ chunk2 = string.substr middle
+
+ v1 = crc chunk1
+ v2 = crc chunk2, v1
+
+ v2.toString(16).should.equal expected
--
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