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<title>Code coverage report for utf8.js/utf8.js</title>
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<div class="header high">
<h1>Code coverage report for <span class="entity">utf8.js/utf8.js</span></h1>
<h2>
Statements: <span class="metric">92.31% <small>(120 / 130)</small></span> &nbsp;&nbsp;&nbsp;&nbsp;
Branches: <span class="metric">78.79% <small>(52 / 66)</small></span> &nbsp;&nbsp;&nbsp;&nbsp;
Functions: <span class="metric">90% <small>(9 / 10)</small></span> &nbsp;&nbsp;&nbsp;&nbsp;
Lines: <span class="metric">92.31% <small>(120 / 130)</small></span> &nbsp;&nbsp;&nbsp;&nbsp;
</h2>
<div class="path"><a href="../index.html">All files</a> &#187; <a href="index.html">utf8.js/</a> &#187; utf8.js</div>
</div>
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<span class="cline-any cline-neutral">&nbsp;</span></td><td class="text"><pre class="prettyprint lang-js">/*! http://mths.be/utf8js v2.0.0 by @mathias */
;(function(root) {
&nbsp;
// Detect free variables `exports`
var freeExports = typeof exports == 'object' &amp;&amp; exports;
&nbsp;
// Detect free variable `module`
var freeModule = typeof module == 'object' &amp;&amp; module &amp;&amp;
module.exports == freeExports &amp;&amp; module;
&nbsp;
// Detect free variable `global`, from Node.js or Browserified code,
// and use it as `root`
var freeGlobal = typeof global == 'object' &amp;&amp; global;
<span class="missing-if-branch" title="else path not taken"" >E</span>if (freeGlobal.global === freeGlobal || <span class="branch-1 cbranch-no" title="branch not covered" >freeGlobal.window === freeGlobal)</span> {
root = freeGlobal;
}
&nbsp;
/*--------------------------------------------------------------------------*/
&nbsp;
var stringFromCharCode = String.fromCharCode;
&nbsp;
// Taken from http://mths.be/punycode
function ucs2decode(string) {
var output = [];
var counter = 0;
var length = string.length;
var value;
var extra;
while (counter &lt; length) {
value = string.charCodeAt(counter++);
if (value &gt;= 0xD800 &amp;&amp; value &lt;= 0xDBFF &amp;&amp; counter &lt; length) {
// high surrogate, and there is a next character
extra = string.charCodeAt(counter++);
if ((extra &amp; 0xFC00) == 0xDC00) { // low surrogate
output.push(((value &amp; 0x3FF) &lt;&lt; 10) + (extra &amp; 0x3FF) + 0x10000);
} else {
// unmatched surrogate; only append this code unit, in case the next
// code unit is the high surrogate of a surrogate pair
output.push(value);
counter--;
}
} else {
output.push(value);
}
}
return output;
}
&nbsp;
// Taken from http://mths.be/punycode
function ucs2encode(array) {
var length = array.length;
var index = -1;
var value;
var output = '';
while (++index &lt; length) {
value = array[index];
if (value &gt; 0xFFFF) {
value -= 0x10000;
output += stringFromCharCode(value &gt;&gt;&gt; 10 &amp; 0x3FF | 0xD800);
value = 0xDC00 | value &amp; 0x3FF;
}
output += stringFromCharCode(value);
}
return output;
}
&nbsp;
/*--------------------------------------------------------------------------*/
&nbsp;
// https://github.com/php/php-src/blob/master/ext/mbstring/oniguruma/enc/utf8.c
function createByte(codePoint, shift) {
return stringFromCharCode(((codePoint &gt;&gt; shift) &amp; 0x3F) | 0x80);
}
&nbsp;
function encodeCodePoint(codePoint) {
if ((codePoint &amp; 0xFFFFFF80) == 0) { // 1-byte sequence
return stringFromCharCode(codePoint);
}
var symbol = '';
if ((codePoint &amp; 0xFFFFF800) == 0) { // 2-byte sequence
symbol = stringFromCharCode(((codePoint &gt;&gt; 6) &amp; 0x1F) | 0xC0);
}
else if ((codePoint &amp; 0xFFFF0000) == 0) { // 3-byte sequence
symbol = stringFromCharCode(((codePoint &gt;&gt; 12) &amp; 0x0F) | 0xE0);
symbol += createByte(codePoint, 6);
}
else <span class="missing-if-branch" title="else path not taken"" >E</span>if ((codePoint &amp; 0xFFE00000) == 0) { // 4-byte sequence
symbol = stringFromCharCode(((codePoint &gt;&gt; 18) &amp; 0x07) | 0xF0);
symbol += createByte(codePoint, 12);
symbol += createByte(codePoint, 6);
}
symbol += stringFromCharCode((codePoint &amp; 0x3F) | 0x80);
return symbol;
}
&nbsp;
function utf8encode(string) {
var codePoints = ucs2decode(string);
&nbsp;
// console.log(JSON.stringify(codePoints.map(function(x) {
// return 'U+' + x.toString(16).toUpperCase();
// })));
&nbsp;
var length = codePoints.length;
var index = -1;
var codePoint;
var byteString = '';
while (++index &lt; length) {
codePoint = codePoints[index];
byteString += encodeCodePoint(codePoint);
}
return byteString;
}
&nbsp;
/*--------------------------------------------------------------------------*/
&nbsp;
// https://github.com/php/php-src/blob/master/ext/json/utf8_decode.c
function readContinuationByte() {
if (byteIndex &gt;= byteCount) {
throw Error('Invalid byte index');
}
&nbsp;
var continuationByte = byteArray[byteIndex] &amp; 0xFF;
byteIndex++;
&nbsp;
if ((continuationByte &amp; 0xC0) == 0x80) {
return continuationByte &amp; 0x3F;
}
&nbsp;
// If we end up here, it’s not a continuation byte
throw Error('Invalid continuation byte');
}
&nbsp;
function decodeSymbol() {
var byte1;
var byte2;
var byte3;
var byte4;
var codePoint;
&nbsp;
<span class="missing-if-branch" title="if path not taken"" >I</span>if (byteIndex &gt; byteCount) {
<span class="cstat-no" title="statement not covered" > throw Error('Invalid byte index');</span>
}
&nbsp;
if (byteIndex == byteCount) {
return false;
}
&nbsp;
// Read first byte
byte1 = byteArray[byteIndex] &amp; 0xFF;
byteIndex++;
&nbsp;
// 1-byte sequence (no continuation bytes)
if ((byte1 &amp; 0x80) == 0) {
return byte1;
}
&nbsp;
// 2-byte sequence
if ((byte1 &amp; 0xE0) == 0xC0) {
var byte2 = readContinuationByte();
codePoint = ((byte1 &amp; 0x1F) &lt;&lt; 6) | byte2;
<span class="missing-if-branch" title="else path not taken"" >E</span>if (codePoint &gt;= 0x80) {
return codePoint;
} else {
<span class="cstat-no" title="statement not covered" > throw Error('Invalid continuation byte');</span>
}
}
&nbsp;
// 3-byte sequence (may include unpaired surrogates)
if ((byte1 &amp; 0xF0) == 0xE0) {
byte2 = readContinuationByte();
byte3 = readContinuationByte();
codePoint = ((byte1 &amp; 0x0F) &lt;&lt; 12) | (byte2 &lt;&lt; 6) | byte3;
<span class="missing-if-branch" title="else path not taken"" >E</span>if (codePoint &gt;= 0x0800) {
return codePoint;
} else {
<span class="cstat-no" title="statement not covered" > throw Error('Invalid continuation byte');</span>
}
}
&nbsp;
// 4-byte sequence
if ((byte1 &amp; 0xF8) == 0xF0) {
byte2 = readContinuationByte();
byte3 = readContinuationByte();
byte4 = readContinuationByte();
codePoint = ((byte1 &amp; 0x0F) &lt;&lt; 0x12) | (byte2 &lt;&lt; 0x0C) |
(byte3 &lt;&lt; 0x06) | byte4;
<span class="missing-if-branch" title="else path not taken"" >E</span>if (codePoint &gt;= 0x010000 &amp;&amp; codePoint &lt;= 0x10FFFF) {
return codePoint;
}
}
&nbsp;
throw Error('Invalid UTF-8 detected');
}
&nbsp;
var byteArray;
var byteCount;
var byteIndex;
function utf8decode(byteString) {
byteArray = ucs2decode(byteString);
byteCount = byteArray.length;
byteIndex = 0;
var codePoints = [];
var tmp;
while ((tmp = decodeSymbol()) !== false) {
codePoints.push(tmp);
}
return ucs2encode(codePoints);
}
&nbsp;
/*--------------------------------------------------------------------------*/
&nbsp;
var utf8 = {
'version': '2.0.0',
'encode': utf8encode,
'decode': utf8decode
};
&nbsp;
// Some AMD build optimizers, like r.js, check for specific condition patterns
// like the following:
<span class="missing-if-branch" title="if path not taken"" >I</span>if (
typeof define == 'function' &amp;&amp;
<span class="branch-1 cbranch-no" title="branch not covered" > typeof define.amd == 'object' </span>&amp;&amp;
<span class="branch-2 cbranch-no" title="branch not covered" > define.amd</span>
) {
<span class="cstat-no" title="statement not covered" > define(<span class="fstat-no" title="function not covered" >function() {</span></span>
<span class="cstat-no" title="statement not covered" > return utf8;</span>
});
} else <span class="missing-if-branch" title="else path not taken"" >E</span>if (freeExports &amp;&amp; !freeExports.nodeType) {
<span class="missing-if-branch" title="else path not taken"" >E</span>if (freeModule) { // in Node.js or RingoJS v0.8.0+
freeModule.exports = utf8;
} else { // in Narwhal or RingoJS v0.7.0-
<span class="cstat-no" title="statement not covered" > var object = {};</span>
<span class="cstat-no" title="statement not covered" > var hasOwnProperty = object.hasOwnProperty;</span>
<span class="cstat-no" title="statement not covered" > for (var key in utf8) {</span>
<span class="cstat-no" title="statement not covered" > hasOwnProperty.call(utf8, key) &amp;&amp; (freeExports[key] = utf8[key]);</span>
}
}
} else { // in Rhino or a web browser
<span class="cstat-no" title="statement not covered" > root.utf8 = utf8;</span>
}
&nbsp;
}(this));
&nbsp;</pre></td></tr>
</table></pre>
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