Initial commit

.gitignore

@@ -0,0 +1,2 @@
+node_modules
+misc/coverage.html

.jscs.json

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+{
+  "requireCommaBeforeLineBreak": true,
+  "disallowTrailingWhitespace": true,
+  "disallowTrailingComma": true
+}
+

.travis.yml

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+language: node_js
+node_js:
+  - "0.11"
+  - "0.10"
+  - "0.8"
+before_install:
+  - "npm install -g mocha"
+  - "npm install blanket"
+  - "npm install coveralls mocha-lcov-reporter"
+after_success:
+  - "make coveralls-spin"

LICENSE

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+Copyright (C) 2014  SheetJS
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+

Makefile

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+LIB=crc32
+DEPS=$(sort $(wildcard bits/*.js))
+TARGET=$(LIB).js
+
+$(TARGET): $(DEPS)
+	cat $^ | tr -d '\15\32' > $@
+	cp -f $@ ctest/ 
+
+bits/01_version.js: package.json
+	echo "CRC32.version = '"`grep version package.json | awk '{gsub(/[^0-9a-z\.-]/,"",$$2); print $$2}'`"';" > $@
+
+.PHONY: clean
+clean:
+	rm -f $(TARGET)
+
+.PHONY: test mocha
+test mocha: test.js
+	mocha -R spec
+
+.PHONY: ctest
+ctest:
+	cat misc/*.js > ctest/fixtures.js
+	cp -f test.js ctest/test.js
+	cp -f $(TARGET) ctest/ 
+
+.PHONY: lint
+lint: $(TARGET)
+	jshint --show-non-errors $(TARGET)
+	jscs $(TARGET)
+
+.PHONY: cov cov-spin
+cov: misc/coverage.html
+cov-spin:
+	make cov & bash misc/spin.sh $$!
+
+COVFMT=$(patsubst %,cov_%,$(FMT))
+.PHONY: $(COVFMT)
+$(COVFMT): cov_%:
+	FMTS=$* make cov
+
+misc/coverage.html: $(TARGET) test.js
+	mocha --require blanket -R html-cov > $@
+
+.PHONY: coveralls coveralls-spin
+coveralls:
+	mocha --require blanket --reporter mocha-lcov-reporter | ./node_modules/coveralls/bin/coveralls.js
+
+coveralls-spin:
+	make coveralls & bash misc/spin.sh $$!
+
+.PHONY: perf
+perf:
+	bash perf/perf.sh

README.md

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+# crc32
+
+Standard CRC-32 algorithm implementation in JS (for the browser and nodejs).
+Emphasis on correctness and performance.
+
+## Installation
+
+In [nodejs](https://www.npmjs.org/package/crc-32):
+
+    npm install crc-32
+
+In the browser:
+
+    <script lang="javascript" src="crc32.js"></script>
+
+The browser exposes a variable CRC32
+
+## Usage
+
+- `CRC32.buf(byte array or buffer)` assumes the argument is a set of 8 bit
+  unsigned integers (e.g. nodejs `Buffer` or simple array of ints)
+
+- `CRC32.bstr(binary string)` interprets the argument as a binary string where
+  the `i`-th byte is `str.charCodeAt(i)`
+
+- `CRC32.str(string)` interprets the argument as a standard JS string
+
+## Testing
+
+`make test` will run the nodejs-based test.  To run the in-browser tests, run a
+local server and go to the `ctest` directory.  To update the browser artifacts,
+run `make ctest`.
+
+## Performance
+
+`make perf` will run performance tests.
+
+## In the future ... 
+
+- Specifying an arbitrary initial CRC value
+
+- Supporting different polynomials (e.g. CRC32C)
+
+## License
+
+Please consult the attached LICENSE file for details.  All rights not explicitly
+granted by the Apache 2.0 license are reserved by the Original Author.
+
+[![Build Status](https://travis-ci.org/SheetJS/js-crc32.png?branch=master)](https://travis-ci.org/SheetJS/js-crc32)
+
+[![Coverage Status](https://coveralls.io/repos/SheetJS/js-crc32/badge.png?branch=master)](https://coveralls.io/r/SheetJS/js-crc32?branch=master)
+
+[![githalytics.com alpha](https://cruel-carlota.pagodabox.com/ee0e89f8b1d5b861ffbf264b8ce329a6 "githalytics.com")](http://githalytics.com/SheetJS/js-crc32)
+

bits/00_header.js

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+/* crc32.js (C) 2014 SheetJS -- http://sheetjs.com */
+/* vim: set ts=2: */
+var CRC32 = {};
+(function(CRC32) {

bits/01_version.js

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+CRC32.version = '0.1.0';

bits/20_crctable.js

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+/* see perf/crc32table.js */
+function signed_crc_table() {
+	var c, table = new Array(256);
+
+	for(var n =0; n != 256; ++n){
+		c = n;
+		c = ((c&1) ? (-306674912 ^ (c >>> 1)) : (c >>> 1));
+		c = ((c&1) ? (-306674912 ^ (c >>> 1)) : (c >>> 1));
+		c = ((c&1) ? (-306674912 ^ (c >>> 1)) : (c >>> 1));
+		c = ((c&1) ? (-306674912 ^ (c >>> 1)) : (c >>> 1));
+		c = ((c&1) ? (-306674912 ^ (c >>> 1)) : (c >>> 1));
+		c = ((c&1) ? (-306674912 ^ (c >>> 1)) : (c >>> 1));
+		c = ((c&1) ? (-306674912 ^ (c >>> 1)) : (c >>> 1));
+		c = ((c&1) ? (-306674912 ^ (c >>> 1)) : (c >>> 1));
+		table[n] = c;
+	}
+
+	return table;
+}
+
+var table = signed_crc_table();

bits/40_crc.js

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+/* charCodeAt is the best approach for binary strings */
+function crc32_bstr(bstr) {
+	for(var crc = -1, i = 0, L=bstr.length-1; i < L;) {
+		crc = (crc >>> 8) ^ table[(crc ^ bstr.charCodeAt(i++)) & 0xFF];
+		crc = (crc >>> 8) ^ table[(crc ^ bstr.charCodeAt(i++)) & 0xFF];
+	}
+	if(i === L) crc = (crc >>> 8) ^ table[(crc ^ bstr.charCodeAt(i++)) & 0xFF];
+	return crc ^ -1;
+}
+
+function crc32_buf(buf) {
+	for(var crc = -1, i = 0; i != buf.length; ++i) {
+		crc = (crc >>> 8) ^ table[(crc ^ buf[i]) & 0xFF];
+	}
+	return crc ^ -1;
+}
+
+/* much much faster to intertwine utf8 and crc */
+function crc32_str(str) {
+	for(var crc = -1, i = 0, L=str.length, c, d; i < L;) {
+		c = str.charCodeAt(i++);
+		if(c < 0x80) {
+			crc = (crc >>> 8) ^ table[(crc ^ c) & 0xFF];
+		} else if(c < 0x800) {
+			crc = (crc >>> 8) ^ table[(crc ^ (192|((c>>6)&31))) & 0xFF];
+			crc = (crc >>> 8) ^ table[(crc ^ (128|(c&63))) & 0xFF];
+		} else if(c >= 0xD800 && c < 0xE000) {
+			c = (c&1023)+64; d = str.charCodeAt(i++) & 1023;
+			crc = (crc >>> 8) ^ table[(crc ^ (240|((c>>8)&7))) & 0xFF];
+			crc = (crc >>> 8) ^ table[(crc ^ (128|((c>>2)&63))) & 0xFF];
+			crc = (crc >>> 8) ^ table[(crc ^ (128|((d>>6)&15)|(c&3))) & 0xFF];
+			crc = (crc >>> 8) ^ table[(crc ^ (128|(d&63))) & 0xFF];
+		} else {
+			crc = (crc >>> 8) ^ table[(crc ^ (224|((c>>12)&15))) & 0xFF];
+			crc = (crc >>> 8) ^ table[(crc ^ (128|((c>>6)&63))) & 0xFF];
+			crc = (crc >>> 8) ^ table[(crc ^ (128|(c&63))) & 0xFF];
+		}
+	}
+	return crc ^ -1;
+}

bits/90_exports.js

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+CRC32.table = table;
+CRC32.bstr = crc32_bstr;
+CRC32.buf = crc32_buf;
+CRC32.str = crc32_str;

bits/99_footer.js

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+})(typeof exports !== "undefined" && typeof DO_NOT_EXPORT_CRC === 'undefined' ? exports : CRC32);

crc32.js

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+/* crc32.js (C) 2014 SheetJS -- http://sheetjs.com */
+/* vim: set ts=2: */
+var CRC32 = {};
+(function(CRC32) {
+CRC32.version = '0.1.0';
+/* see perf/crc32table.js */
+function signed_crc_table() {
+	var c, table = new Array(256);
+
+	for(var n =0; n != 256; ++n){
+		c = n;
+		c = ((c&1) ? (-306674912 ^ (c >>> 1)) : (c >>> 1));
+		c = ((c&1) ? (-306674912 ^ (c >>> 1)) : (c >>> 1));
+		c = ((c&1) ? (-306674912 ^ (c >>> 1)) : (c >>> 1));
+		c = ((c&1) ? (-306674912 ^ (c >>> 1)) : (c >>> 1));
+		c = ((c&1) ? (-306674912 ^ (c >>> 1)) : (c >>> 1));
+		c = ((c&1) ? (-306674912 ^ (c >>> 1)) : (c >>> 1));
+		c = ((c&1) ? (-306674912 ^ (c >>> 1)) : (c >>> 1));
+		c = ((c&1) ? (-306674912 ^ (c >>> 1)) : (c >>> 1));
+		table[n] = c;
+	}
+
+	return table;
+}
+
+var table = signed_crc_table();
+/* charCodeAt is the best approach for binary strings */
+function crc32_bstr(bstr) {
+	for(var crc = -1, i = 0, L=bstr.length-1; i < L;) {
+		crc = (crc >>> 8) ^ table[(crc ^ bstr.charCodeAt(i++)) & 0xFF];
+		crc = (crc >>> 8) ^ table[(crc ^ bstr.charCodeAt(i++)) & 0xFF];
+	}
+	if(i === L) crc = (crc >>> 8) ^ table[(crc ^ bstr.charCodeAt(i++)) & 0xFF];
+	return crc ^ -1;
+}
+
+function crc32_buf(buf) {
+	for(var crc = -1, i = 0; i != buf.length; ++i) {
+		crc = (crc >>> 8) ^ table[(crc ^ buf[i]) & 0xFF];
+	}
+	return crc ^ -1;
+}
+
+/* much much faster to intertwine utf8 and crc */
+function crc32_str(str) {
+	for(var crc = -1, i = 0, L=str.length, c, d; i < L;) {
+		c = str.charCodeAt(i++);
+		if(c < 0x80) {
+			crc = (crc >>> 8) ^ table[(crc ^ c) & 0xFF];
+		} else if(c < 0x800) {
+			crc = (crc >>> 8) ^ table[(crc ^ (192|((c>>6)&31))) & 0xFF];
+			crc = (crc >>> 8) ^ table[(crc ^ (128|(c&63))) & 0xFF];
+		} else if(c >= 0xD800 && c < 0xE000) {
+			c = (c&1023)+64; d = str.charCodeAt(i++) & 1023;
+			crc = (crc >>> 8) ^ table[(crc ^ (240|((c>>8)&7))) & 0xFF];
+			crc = (crc >>> 8) ^ table[(crc ^ (128|((c>>2)&63))) & 0xFF];
+			crc = (crc >>> 8) ^ table[(crc ^ (128|((d>>6)&15)|(c&3))) & 0xFF];
+			crc = (crc >>> 8) ^ table[(crc ^ (128|(d&63))) & 0xFF];
+		} else {
+			crc = (crc >>> 8) ^ table[(crc ^ (224|((c>>12)&15))) & 0xFF];
+			crc = (crc >>> 8) ^ table[(crc ^ (128|((c>>6)&63))) & 0xFF];
+			crc = (crc >>> 8) ^ table[(crc ^ (128|(c&63))) & 0xFF];
+		}
+	}
+	return crc ^ -1;
+}
+CRC32.table = table;
+CRC32.bstr = crc32_bstr;
+CRC32.buf = crc32_buf;
+CRC32.str = crc32_str;
+})(typeof exports !== "undefined" && typeof DO_NOT_EXPORT_CRC === 'undefined' ? exports : CRC32);

ctest/crc32.js

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+/* crc32.js (C) 2014 SheetJS -- http://sheetjs.com */
+/* vim: set ts=2: */
+var CRC32 = {};
+(function(CRC32) {
+CRC32.version = '0.1.0';
+/* see perf/crc32table.js */
+function signed_crc_table() {
+	var c, table = new Array(256);
+
+	for(var n =0; n != 256; ++n){
+		c = n;
+		c = ((c&1) ? (-306674912 ^ (c >>> 1)) : (c >>> 1));
+		c = ((c&1) ? (-306674912 ^ (c >>> 1)) : (c >>> 1));
+		c = ((c&1) ? (-306674912 ^ (c >>> 1)) : (c >>> 1));
+		c = ((c&1) ? (-306674912 ^ (c >>> 1)) : (c >>> 1));
+		c = ((c&1) ? (-306674912 ^ (c >>> 1)) : (c >>> 1));
+		c = ((c&1) ? (-306674912 ^ (c >>> 1)) : (c >>> 1));
+		c = ((c&1) ? (-306674912 ^ (c >>> 1)) : (c >>> 1));
+		c = ((c&1) ? (-306674912 ^ (c >>> 1)) : (c >>> 1));
+		table[n] = c;
+	}
+
+	return table;
+}
+
+var table = signed_crc_table();
+/* charCodeAt is the best approach for binary strings */
+function crc32_bstr(bstr) {
+	for(var crc = -1, i = 0, L=bstr.length-1; i < L;) {
+		crc = (crc >>> 8) ^ table[(crc ^ bstr.charCodeAt(i++)) & 0xFF];
+		crc = (crc >>> 8) ^ table[(crc ^ bstr.charCodeAt(i++)) & 0xFF];
+	}
+	if(i === L) crc = (crc >>> 8) ^ table[(crc ^ bstr.charCodeAt(i++)) & 0xFF];
+	return crc ^ -1;
+}
+
+function crc32_buf(buf) {
+	for(var crc = -1, i = 0; i != buf.length; ++i) {
+		crc = (crc >>> 8) ^ table[(crc ^ buf[i]) & 0xFF];
+	}
+	return crc ^ -1;
+}
+
+/* much much faster to intertwine utf8 and crc */
+function crc32_str(str) {
+	for(var crc = -1, i = 0, L=str.length, c, d; i < L;) {
+		c = str.charCodeAt(i++);
+		if(c < 0x80) {
+			crc = (crc >>> 8) ^ table[(crc ^ c) & 0xFF];
+		} else if(c < 0x800) {
+			crc = (crc >>> 8) ^ table[(crc ^ (192|((c>>6)&31))) & 0xFF];
+			crc = (crc >>> 8) ^ table[(crc ^ (128|(c&63))) & 0xFF];
+		} else if(c >= 0xD800 && c < 0xE000) {
+			c = (c&1023)+64; d = str.charCodeAt(i++) & 1023;
+			crc = (crc >>> 8) ^ table[(crc ^ (240|((c>>8)&7))) & 0xFF];
+			crc = (crc >>> 8) ^ table[(crc ^ (128|((c>>2)&63))) & 0xFF];
+			crc = (crc >>> 8) ^ table[(crc ^ (128|((d>>6)&15)|(c&3))) & 0xFF];
+			crc = (crc >>> 8) ^ table[(crc ^ (128|(d&63))) & 0xFF];
+		} else {
+			crc = (crc >>> 8) ^ table[(crc ^ (224|((c>>12)&15))) & 0xFF];
+			crc = (crc >>> 8) ^ table[(crc ^ (128|((c>>6)&63))) & 0xFF];
+			crc = (crc >>> 8) ^ table[(crc ^ (128|(c&63))) & 0xFF];
+		}
+	}
+	return crc ^ -1;
+}
+CRC32.table = table;
+CRC32.bstr = crc32_bstr;
+CRC32.buf = crc32_buf;
+CRC32.str = crc32_str;
+})(typeof exports !== "undefined" && typeof DO_NOT_EXPORT_CRC === 'undefined' ? exports : CRC32);

ctest/fakeassert.js

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+var assert = {};
+assert.equal = function(x,y) { if(x !== y) throw x + " !== " + y; };

ctest/fixtures.js

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+var bits = [
+	[ "foobar", -1628037227, 1 ],
+	[ "foo bar baz", -228401567, 1 ],
+	[ "foo bar baz٪", 984445192 ],
+	[ "foo bar baz٪☃", 140429620],
+	[ "foo bar baz٪☃🍣", 1531648243]
+];
+if(typeof module !== "undefined") module.exports = bits;
+crc32table = [
+	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 module !== 'undefined') module.exports = crc32table;

ctest/index.html

@@ -0,0 +1,21 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <title>Mocha</title>
+    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <link rel="stylesheet" href="mocha.css" />
+  </head>
+  <body>
+    <div id="mocha"></div>
+    <script src="crc32.js"></script>
+    <script src="fakeassert.js"></script>
+    <script src="mocha.js"></script>
+    <script src="fixtures.js"></script>
+    <script>mocha.setup('bdd')</script>
+    <script src="test.js"></script>
+    <script>
+      mocha.run();
+    </script>
+  </body>
+</html>

ctest/mocha.css

@@ -0,0 +1,270 @@
+@charset "utf-8";
+
+body {
+  margin:0;
+}
+
+#mocha {
+  font: 20px/1.5 "Helvetica Neue", Helvetica, Arial, sans-serif;
+  margin: 60px 50px;
+}
+
+#mocha ul,
+#mocha li {
+  margin: 0;
+  padding: 0;
+}
+
+#mocha ul {
+  list-style: none;
+}
+
+#mocha h1,
+#mocha h2 {
+  margin: 0;
+}
+
+#mocha h1 {
+  margin-top: 15px;
+  font-size: 1em;
+  font-weight: 200;
+}
+
+#mocha h1 a {
+  text-decoration: none;
+  color: inherit;
+}
+
+#mocha h1 a:hover {
+  text-decoration: underline;
+}
+
+#mocha .suite .suite h1 {
+  margin-top: 0;
+  font-size: .8em;
+}
+
+#mocha .hidden {
+  display: none;
+}
+
+#mocha h2 {
+  font-size: 12px;
+  font-weight: normal;
+  cursor: pointer;
+}
+
+#mocha .suite {
+  margin-left: 15px;
+}
+
+#mocha .test {
+  margin-left: 15px;
+  overflow: hidden;
+}
+
+#mocha .test.pending:hover h2::after {
+  content: '(pending)';
+  font-family: arial, sans-serif;
+}
+
+#mocha .test.pass.medium .duration {
+  background: #c09853;
+}
+
+#mocha .test.pass.slow .duration {
+  background: #b94a48;
+}
+
+#mocha .test.pass::before {
+  content: '✓';
+  font-size: 12px;
+  display: block;
+  float: left;
+  margin-right: 5px;
+  color: #00d6b2;
+}
+
+#mocha .test.pass .duration {
+  font-size: 9px;
+  margin-left: 5px;
+  padding: 2px 5px;
+  color: #fff;
+  -webkit-box-shadow: inset 0 1px 1px rgba(0,0,0,.2);
+  -moz-box-shadow: inset 0 1px 1px rgba(0,0,0,.2);
+  box-shadow: inset 0 1px 1px rgba(0,0,0,.2);
+  -webkit-border-radius: 5px;
+  -moz-border-radius: 5px;
+  -ms-border-radius: 5px;
+  -o-border-radius: 5px;
+  border-radius: 5px;
+}
+
+#mocha .test.pass.fast .duration {
+  display: none;
+}
+
+#mocha .test.pending {
+  color: #0b97c4;
+}
+
+#mocha .test.pending::before {
+  content: '◦';
+  color: #0b97c4;
+}
+
+#mocha .test.fail {
+  color: #c00;
+}
+
+#mocha .test.fail pre {
+  color: black;
+}
+
+#mocha .test.fail::before {
+  content: '✖';
+  font-size: 12px;
+  display: block;
+  float: left;
+  margin-right: 5px;
+  color: #c00;
+}
+
+#mocha .test pre.error {
+  color: #c00;
+  max-height: 300px;
+  overflow: auto;
+}
+
+/**
+ * (1): approximate for browsers not supporting calc
+ * (2): 42 = 2*15 + 2*10 + 2*1 (padding + margin + border)
+ *      ^^ seriously
+ */
+#mocha .test pre {
+  display: block;
+  float: left;
+  clear: left;
+  font: 12px/1.5 monaco, monospace;
+  margin: 5px;
+  padding: 15px;
+  border: 1px solid #eee;
+  max-width: 85%; /*(1)*/
+  max-width: calc(100% - 42px); /*(2)*/
+  word-wrap: break-word;
+  border-bottom-color: #ddd;
+  -webkit-border-radius: 3px;
+  -webkit-box-shadow: 0 1px 3px #eee;
+  -moz-border-radius: 3px;
+  -moz-box-shadow: 0 1px 3px #eee;
+  border-radius: 3px;
+}
+
+#mocha .test h2 {
+  position: relative;
+}
+
+#mocha .test a.replay {
+  position: absolute;
+  top: 3px;
+  right: 0;
+  text-decoration: none;
+  vertical-align: middle;
+  display: block;
+  width: 15px;
+  height: 15px;
+  line-height: 15px;
+  text-align: center;
+  background: #eee;
+  font-size: 15px;
+  -moz-border-radius: 15px;
+  border-radius: 15px;
+  -webkit-transition: opacity 200ms;
+  -moz-transition: opacity 200ms;
+  transition: opacity 200ms;
+  opacity: 0.3;
+  color: #888;
+}
+
+#mocha .test:hover a.replay {
+  opacity: 1;
+}
+
+#mocha-report.pass .test.fail {
+  display: none;
+}
+
+#mocha-report.fail .test.pass {
+  display: none;
+}
+
+#mocha-report.pending .test.pass,
+#mocha-report.pending .test.fail {
+  display: none;
+}
+#mocha-report.pending .test.pass.pending {
+  display: block;
+}
+
+#mocha-error {
+  color: #c00;
+  font-size: 1.5em;
+  font-weight: 100;
+  letter-spacing: 1px;
+}
+
+#mocha-stats {
+  position: fixed;
+  top: 15px;
+  right: 10px;
+  font-size: 12px;
+  margin: 0;
+  color: #888;
+  z-index: 1;
+}
+
+#mocha-stats .progress {
+  float: right;
+  padding-top: 0;
+}
+
+#mocha-stats em {
+  color: black;
+}
+
+#mocha-stats a {
+  text-decoration: none;
+  color: inherit;
+}
+
+#mocha-stats a:hover {
+  border-bottom: 1px solid #eee;
+}
+
+#mocha-stats li {
+  display: inline-block;
+  margin: 0 5px;
+  list-style: none;
+  padding-top: 11px;
+}
+
+#mocha-stats canvas {
+  width: 40px;
+  height: 40px;
+}
+
+#mocha code .comment { color: #ddd; }
+#mocha code .init { color: #2f6fad; }
+#mocha code .string { color: #5890ad; }
+#mocha code .keyword { color: #8a6343; }
+#mocha code .number { color: #2f6fad; }
+
+@media screen and (max-device-width: 480px) {
+  #mocha {
+    margin: 60px 0px;
+  }
+
+  #mocha #stats {
+    position: absolute;
+  }
+}

ctest/test.js

@@ -0,0 +1,33 @@
+/* vim: set ts=2: */
+var X;
+if(typeof require !== 'undefined') {
+	assert = require('assert');
+	describe('source',function(){it('should load',function(){X=require('./');});});
+	bits = require('./misc/bits.js');
+	crc32table = require('./misc/table.js');
+} else { X = CRC32; }
+
+describe('crc32 table', function() {
+	it('should match fixed table', function() {
+		var badness = 0;
+		for(var i = 0; i != crc32table.length; ++i) {
+			assert.equal(crc32table[i]|0, X.table[i]);
+			if(crc32table[i] !== X.table[i]) ++badness;
+		}
+		assert.equal(badness, 128);
+	});
+});
+
+describe('crc32 bits', function() {
+	bits.forEach(function(i) {
+		var l = i[0].length;
+		var msg = i[0];
+		if(l > 20) i[0].substr(0,5) + "...(" + l + ")..." + i[0].substr(-5);
+		it(msg, function() {
+			if(i[2] === 1) assert.equal(X.bstr(i[0]), i[1]|0);
+			assert.equal(X.str(i[0]), i[1]|0);
+			if(typeof Buffer !== 'undefined') assert.equal(X.buf(new Buffer(i[0])), i[1]|0);
+		});
+	});
+});
+

misc/bits.js

@@ -0,0 +1,8 @@
+var bits = [
+	[ "foobar", -1628037227, 1 ],
+	[ "foo bar baz", -228401567, 1 ],
+	[ "foo bar baz٪", 984445192 ],
+	[ "foo bar baz٪☃", 140429620],
+	[ "foo bar baz٪☃🍣", 1531648243]
+];
+if(typeof module !== "undefined") module.exports = bits;

misc/table.js

@@ -0,0 +1,67 @@
+crc32table = [
+	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 module !== 'undefined') module.exports = crc32table;

package.json

@@ -0,0 +1,27 @@
+{
+	"name": "crc-32",
+	"version": "0.1.0",
+	"author": "sheetjs",
+	"description": "Pure-JS CRC-32",
+	"keywords": [ "crc32", "checksum", "crc" ],
+	"main": "./crc32",
+	"devDependencies": {
+		"mocha":"",
+		"xlsjs":"",
+		"uglify-js":"",
+		"codepage":""
+	},
+	"repository": { "type":"git", "url":"git://github.com/SheetJS/js-crc32.git" },
+	"scripts": {
+		"pretest": "git submodule init && git submodule update",
+		"test": "make test"
+	},
+	"config": {
+		"blanket": {
+			"pattern": "crc32.js"
+		}
+	},
+	"bugs": { "url": "https://github.com/SheetJS/js-crc32/issues" },
+	"license": "Apache-2.0",
+	"engines": { "node": ">=0.8" }
+}

perf/bm.js

@@ -0,0 +1,28 @@
+/* ssf.js (C) 2014 SheetJS -- http://sheetjs.com */
+var Benchmark = require('benchmark');
+var c = require('ansi')(process.stdout);
+
+function test_end() { c.horizontalAbsolute(0).write("✓"); c.write('\n'); }
+
+function suite_end() { console.log('Fastest is ' + this.filter('fastest').pluck('name')); } 
+
+function test_cycle(e) { c.horizontalAbsolute(0); c.eraseLine(); c.write("→ "+e.target); }
+
+function BM(name) {
+	if(!(this instanceof BM)) return new BM(name);
+	console.log("--- " + name + " ---");
+	this.suite = new Benchmark.Suite(name, { onComplete: suite_end });
+}
+
+BM.prototype.run = function() { this.suite.run(); };
+
+BM.prototype.add = function(msg, test) {
+	this.suite.add(msg, {
+		onCycle: test_cycle, 
+		onComplete: test_end,
+		defer: false, 
+		fn: test
+	});
+};
+
+module.exports = BM;

perf/bstr.js

@@ -0,0 +1,83 @@
+var table = require('../').table;
+
+function strToArr(str) {
+	// sweet hack to turn string into a 'byte' array
+	return Array.prototype.map.call(str, function (c) {
+		return c.charCodeAt(0);
+	});
+}
+
+	function crcTable(arr, append) {
+		var crc, i, l;
+
+		// if we're in append mode, don't reset crc
+		// if arr is null or undefined, reset table and return
+		if (typeof crcTable.crc === 'undefined' || !append || !arr) {
+			crcTable.crc = 0 ^ -1;
+
+			if (!arr) {
+				return;
+			}
+		}
+
+		// store in temp variable for minor speed gain
+		crc = crcTable.crc;
+
+		for (i = 0, l = arr.length; i < l; i += 1) {
+			crc = (crc >>> 8) ^ table[(crc ^ arr[i]) & 0xff];
+		}
+
+		crcTable.crc = crc;
+
+		return crc ^ -1;
+	}
+
+function node_crc32(bstr) {
+	return crcTable(strToArr(bstr));
+}
+
+function sheetjs1(bstr) { 
+	for(var crc = -1, i = 0; i != bstr.length; ++i) {
+		crc = (crc >>> 8) ^ table[(crc ^ bstr.charCodeAt(i)) & 0xFF];
+	}
+	return crc ^ -1;
+}
+
+function sheetjs2(bstr) { 
+	for(var crc = -1, i = 0, L=bstr.length-1; i < L;) {
+		crc = (crc >>> 8) ^ table[(crc ^ bstr.charCodeAt(i++)) & 0xFF];
+		crc = (crc >>> 8) ^ table[(crc ^ bstr.charCodeAt(i++)) & 0xFF];
+	}
+	if(i === L) crc = (crc >>> 8) ^ table[(crc ^ bstr.charCodeAt(i++)) & 0xFF];
+	return crc ^ -1;
+}
+
+function sheetjs3(bstr) { 
+	for(var crc = -1, i = 0, L=bstr.length-2; i < L;) {
+		crc = (crc >>> 8) ^ table[(crc ^ bstr.charCodeAt(i++)) & 0xFF];
+		crc = (crc >>> 8) ^ table[(crc ^ bstr.charCodeAt(i++)) & 0xFF];
+		crc = (crc >>> 8) ^ table[(crc ^ bstr.charCodeAt(i++)) & 0xFF];
+	}
+	if(i === L++) crc = (crc >>> 8) ^ table[(crc ^ bstr.charCodeAt(i++)) & 0xFF];
+	if(i === L++) crc = (crc >>> 8) ^ table[(crc ^ bstr.charCodeAt(i++)) & 0xFF];
+	return crc ^ -1;
+}
+
+var BM = require('./bm');
+var suite = new BM('binary string');
+
+var foobar = "foobarbazqux";
+foobar += " " + foobar;
+foobar += " " + foobar;
+foobar += " " + foobar;
+foobar += " " + foobar;
+suite.add('npm crc32', function() { for(var j = 0; j != 1000; ++j) node_crc32(foobar); });
+suite.add('sheetjs 1', function() { for(var j = 0; j != 1000; ++j) sheetjs1(foobar); });
+suite.add('sheetjs 2', function() { for(var j = 0; j != 1000; ++j) sheetjs2(foobar); });
+suite.add('sheetjs 3', function() { for(var j = 0; j != 1000; ++j) sheetjs3(foobar); });
+suite.run();
+
+var assert = require('assert');
+assert.equal(node_crc32(foobar), sheetjs1(foobar));
+assert.equal(node_crc32(foobar), sheetjs2(foobar));
+assert.equal(node_crc32(foobar), sheetjs3(foobar));

perf/crc32table.js

@@ -0,0 +1,86 @@
+var t=[], poly = 0xEDB88320;
+function node_crc32() {
+	var c, n, k;
+
+	for (n = 0; n < 256; n += 1) {
+		c = n;
+		for (k = 0; k < 8; k += 1) {
+			if (c & 1) {
+				c = poly ^ (c >>> 1);
+			} else {
+				c = c >>> 1;
+			}
+		}
+		t[n] = c >>> 0;
+	}
+}
+
+function node_pako() {
+	var c, table = [];
+
+	for(var n =0; n < 256; n++){
+		c = n;
+		for(var k =0; k < 8; k++){
+			c = ((c&1) ? (0xEDB88320 ^ (c >>> 1)) : (c >>> 1));
+		}
+		table[n] = c;
+	}
+
+	return table;
+}
+
+function sheetjs1() {
+	var c, table = [];
+
+	for(var n =0; n != 256; ++n){
+		c = n;
+		c = ((c&1) ? (0xEDB88320 ^ (c >>> 1)) : (c >>> 1));
+		c = ((c&1) ? (0xEDB88320 ^ (c >>> 1)) : (c >>> 1));
+		c = ((c&1) ? (0xEDB88320 ^ (c >>> 1)) : (c >>> 1));
+		c = ((c&1) ? (0xEDB88320 ^ (c >>> 1)) : (c >>> 1));
+		c = ((c&1) ? (0xEDB88320 ^ (c >>> 1)) : (c >>> 1));
+		c = ((c&1) ? (0xEDB88320 ^ (c >>> 1)) : (c >>> 1));
+		c = ((c&1) ? (0xEDB88320 ^ (c >>> 1)) : (c >>> 1));
+		c = ((c&1) ? (0xEDB88320 ^ (c >>> 1)) : (c >>> 1));
+		table[n] = c;
+	}
+
+	return table;
+}
+
+function sheetjs2() {
+	var c, table = new Array(256);
+
+	for(var n =0; n != 256; ++n){
+		c = n;
+		c = ((c&1) ? (-306674912 ^ (c >>> 1)) : (c >>> 1));
+		c = ((c&1) ? (-306674912 ^ (c >>> 1)) : (c >>> 1));
+		c = ((c&1) ? (-306674912 ^ (c >>> 1)) : (c >>> 1));
+		c = ((c&1) ? (-306674912 ^ (c >>> 1)) : (c >>> 1));
+		c = ((c&1) ? (-306674912 ^ (c >>> 1)) : (c >>> 1));
+		c = ((c&1) ? (-306674912 ^ (c >>> 1)) : (c >>> 1));
+		c = ((c&1) ? (-306674912 ^ (c >>> 1)) : (c >>> 1));
+		c = ((c&1) ? (-306674912 ^ (c >>> 1)) : (c >>> 1));
+		table[n] = c;
+	}
+
+	return table;
+}
+
+var BM = require('./bm');
+var suite = new BM('building crc32 table');
+
+suite.add('npm crc32', function() { for(var j = 0; j != 1000; ++j) node_crc32(); });
+suite.add('npm  pako', function() { for(var j = 0; j != 1000; ++j) node_pako(); });
+suite.add('sheetjs 1', function() { for(var j = 0; j != 1000; ++j) sheetjs1(); });
+suite.add('sheetjs 2', function() { for(var j = 0; j != 1000; ++j) sheetjs2(); });
+suite.run()
+
+var assert    = require('assert');
+var m1 = (node_pako());
+var m2 = (sheetjs1());
+var m3 = (sheetjs2());
+
+assert.equal(m1.length, m2.length);
+assert.equal(m1.length, m3.length);
+for(var i = 0; i != m1.length; ++i) { assert.equal(m1[i], m2[i]); assert.equal(m1[i], m3[i]); }

perf/perf.sh

@@ -0,0 +1,6 @@
+#!/bin/bash
+
+node perf/crc32table.js
+node perf/bstr.js
+node perf/utf8.js
+

perf/utf8.js

@@ -0,0 +1,47 @@
+var table = require('../').table;
+
+function sheetjs1(utf8) {
+	var buf = new Buffer(utf8);
+	for(var crc = -1, i = 0; i != buf.length; ++i) {
+		crc = (crc >>> 8) ^ table[(crc ^ buf[i]) & 0xFF];
+	}
+	return crc ^ -1;
+}
+
+function sheetjs2(utf8) {
+	for(var crc = -1, i = 0, L=utf8.length, c, d; i < L;) {
+		c = utf8.charCodeAt(i++);
+		if(c < 0x80) {
+			crc = (crc >>> 8) ^ table[(crc ^ c) & 0xFF];
+		} else if(c < 0x800) {
+			crc = (crc >>> 8) ^ table[(crc ^ (192|((c>>6)&31))) & 0xFF];
+			crc = (crc >>> 8) ^ table[(crc ^ (128|(c&63))) & 0xFF];
+		} else if(c >= 0xD800 && c < 0xE000) {
+			c = (c&1023)+64; d = utf8.charCodeAt(i++) & 1023;
+			crc = (crc >>> 8) ^ table[(crc ^ (240|((c>>8)&7))) & 0xFF];
+			crc = (crc >>> 8) ^ table[(crc ^ (128|((c>>2)&63))) & 0xFF];
+			crc = (crc >>> 8) ^ table[(crc ^ (128|((d>>6)&15)|(c&3))) & 0xFF];
+			crc = (crc >>> 8) ^ table[(crc ^ (128|(d&63))) & 0xFF];
+		} else {
+			crc = (crc >>> 8) ^ table[(crc ^ (224|((c>>12)&15))) & 0xFF];
+			crc = (crc >>> 8) ^ table[(crc ^ (128|((c>>6)&63))) & 0xFF];
+			crc = (crc >>> 8) ^ table[(crc ^ (128|(c&63))) & 0xFF];
+		}
+	}
+	return crc ^ -1;
+}
+
+var BM = require('./bm');
+var suite = new BM('unicode string');
+
+var foobar = "foo bar baz٪☃🍣";
+foobar += " " + foobar;
+foobar += " " + foobar;
+foobar += " " + foobar;
+foobar += " " + foobar;
+suite.add('sheetjs 1', function() { for(var j = 0; j != 1000; ++j) sheetjs1(foobar); });
+suite.add('sheetjs 2', function() { for(var j = 0; j != 1000; ++j) sheetjs2(foobar); });
+suite.run()
+var assert = require('assert');
+assert.equal(sheetjs1(foobar), sheetjs2(foobar));
+

test.js

@@ -0,0 +1,33 @@
+/* vim: set ts=2: */
+var X;
+if(typeof require !== 'undefined') {
+	assert = require('assert');
+	describe('source',function(){it('should load',function(){X=require('./');});});
+	bits = require('./misc/bits.js');
+	crc32table = require('./misc/table.js');
+} else { X = CRC32; }
+
+describe('crc32 table', function() {
+	it('should match fixed table', function() {
+		var badness = 0;
+		for(var i = 0; i != crc32table.length; ++i) {
+			assert.equal(crc32table[i]|0, X.table[i]);
+			if(crc32table[i] !== X.table[i]) ++badness;
+		}
+		assert.equal(badness, 128);
+	});
+});
+
+describe('crc32 bits', function() {
+	bits.forEach(function(i) {
+		var l = i[0].length;
+		var msg = i[0];
+		if(l > 20) i[0].substr(0,5) + "...(" + l + ")..." + i[0].substr(-5);
+		it(msg, function() {
+			if(i[2] === 1) assert.equal(X.bstr(i[0]), i[1]|0);
+			assert.equal(X.str(i[0]), i[1]|0);
+			if(typeof Buffer !== 'undefined') assert.equal(X.buf(new Buffer(i[0])), i[1]|0);
+		});
+	});
+});
+