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<h1>Code coverage report for <span class="entity">lib/writable_streambuffer.js</span></h1>
<h2>
Statements: <span class="metric">96.77% <small>(60 / 62)</small></span> &nbsp;&nbsp;&nbsp;&nbsp;
Branches: <span class="metric">90.63% <small>(29 / 32)</small></span> &nbsp;&nbsp;&nbsp;&nbsp;
Functions: <span class="metric">100% <small>(9 / 9)</small></span> &nbsp;&nbsp;&nbsp;&nbsp;
Lines: <span class="metric">98.25% <small>(56 / 57)</small></span> &nbsp;&nbsp;&nbsp;&nbsp;
Ignored: <span class="metric"><span class="ignore-none">none</span></span> &nbsp;&nbsp;&nbsp;&nbsp;
</h2>
<div class="path"><a href="../index.html">All files</a> &#187; <a href="index.html">lib/</a> &#187; writable_streambuffer.js</div>
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<span class="cline-any cline-neutral">&nbsp;</span></td><td class="text"><pre class="prettyprint lang-js">var util = require("util"),
stream = require("stream"),
constants = require("./constants");
&nbsp;
// TODO: clear up specs on returning false from a write and emitting a drain event.
// Does this mean if I return false from a write, I should ignore any write requests between that false return and the drain event?
var WritableStreamBuffer = module.exports = function(opts) {
var that = this;
&nbsp;
stream.Stream.call(this);
&nbsp;
opts = opts || {};
var initialSize = opts.initialSize || constants.DEFAULT_INITIAL_SIZE;
var incrementAmount = opts.incrementAmount || constants.DEFAULT_INCREMENT_AMOUNT;
&nbsp;
var buffer = new Buffer(initialSize);
var size = 0;
&nbsp;
this.writable = true;
this.readable = false;
&nbsp;
this.size = function() {
return size;
};
&nbsp;
this.maxSize = function() {
return buffer.length;
};
&nbsp;
this.getContents = function(length) {
if(!size) return false;
&nbsp;
var data = new Buffer(Math.min(length || size, size));
buffer.copy(data, 0, 0, data.length);
&nbsp;
<span class="missing-if-branch" title="if path not taken" >I</span>if(data.length &lt; size)
<span class="cstat-no" title="statement not covered" > buffer.copy(buffer, 0, data.length);</span>
&nbsp;
size -= data.length;
&nbsp;
return data;
};
&nbsp;
this.getContentsAsString = function(encoding, length) {
if(!size) return false;
&nbsp;
var data = buffer.toString(encoding || "utf8", 0, Math.min(length || size, size));
var dataLength = Buffer.byteLength(data);
&nbsp;
if(dataLength &lt; size)
buffer.copy(buffer, 0, dataLength);
&nbsp;
size -= dataLength;
return data;
};
&nbsp;
var increaseBufferIfNecessary = function(incomingDataSize) {
if((buffer.length - size) &lt; incomingDataSize) {
var factor = Math.ceil((incomingDataSize - (buffer.length - size)) / incrementAmount);
&nbsp;
var newBuffer = new Buffer(buffer.length + (incrementAmount * factor));
buffer.copy(newBuffer, 0, 0, size);
buffer = newBuffer;
}
};
&nbsp;
this.write = function(data, encoding, callback) {
if(!that.writable) return;
&nbsp;
if(Buffer.isBuffer(data)) {
increaseBufferIfNecessary(data.length);
data.copy(buffer, size, 0);
size += data.length;
}
else {
data = data + "";
increaseBufferIfNecessary(Buffer.byteLength(data));
buffer.write(data, size, encoding || "utf8");
size += Buffer.byteLength(data);
}
<span class="missing-if-branch" title="if path not taken" >I</span>if(typeof callback === "function") { <span class="cstat-no" title="statement not covered" >callback() ;}</span>
};
&nbsp;
this.end = function() {
var args = Array.prototype.slice.apply(arguments);
<span class="missing-if-branch" title="else path not taken" >E</span>if(args.length) that.write.apply(that, args);
that.emit('finish');
that.destroy();
};
&nbsp;
this.destroySoon = this.destroy = function() {
that.writable = false;
that.emit("close");
};
};
util.inherits(WritableStreamBuffer, stream.Stream);
&nbsp;</pre></td></tr>
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