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    <h1>Code coverage report for <span class="entity">lib/parsers/javascript.js</span></h1>
    <h2>
        Statements: <span class="metric">98.1% <small>(103 / 105)</small></span> &nbsp;&nbsp;&nbsp;&nbsp;
        Branches: <span class="metric">95.92% <small>(47 / 49)</small></span> &nbsp;&nbsp;&nbsp;&nbsp;
        Functions: <span class="metric">100% <small>(8 / 8)</small></span> &nbsp;&nbsp;&nbsp;&nbsp;
        Lines: <span class="metric">98.1% <small>(103 / 105)</small></span> &nbsp;&nbsp;&nbsp;&nbsp;
        Ignored: <span class="metric">1 statement, 1 branch</span> &nbsp;&nbsp;&nbsp;&nbsp;
    </h2>
    <div class="path"><a href="../../index.html">All files</a> &#187; <a href="index.html">lib/parsers/</a> &#187; javascript.js</div>
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<span class="cline-any cline-neutral">&nbsp;</span></td><td class="text"><pre class="prettyprint lang-js">'use strict';
&nbsp;
var util   = require('util');
&nbsp;
function JavascriptReplyParser() {
    this.name = exports.name;
    this._buffer            = new Buffer(0);
    this._offset            = 0;
}
&nbsp;
function IncompleteReadBuffer(message) {
    this.name = 'IncompleteReadBuffer';
    this.message = message;
}
util.inherits(IncompleteReadBuffer, Error);
&nbsp;
JavascriptReplyParser.prototype._parseResult = function (type) {
    var start = 0,
        end = 0,
        offset = 0,
        packetHeader = 0;
&nbsp;
    if (type === 43 || type === 58 || type === 45) { // + or : or -
        // up to the delimiter
        end = this._packetEndOffset() - 1;
        start = this._offset;
&nbsp;
        <span class="missing-if-branch" title="if path not taken" >I</span>if (end &gt; this._buffer.length) {
<span class="cstat-no" title="statement not covered" >            throw new IncompleteReadBuffer('Wait for more data.');</span>
        }
&nbsp;
        // include the delimiter
        this._offset = end + 2;
&nbsp;
        if (type === 43) {
            return this._buffer.slice(start, end);
        } else if (type === 58) {
            // return the coerced numeric value
            return +this._buffer.toString('ascii', start, end);
        }
        return new Error(this._buffer.toString('utf-8', start, end));
    } else if (type === 36) { // $
        // set a rewind point, as the packet could be larger than the
        // buffer in memory
        offset = this._offset - 1;
&nbsp;
        packetHeader = this.parseHeader();
&nbsp;
        // packets with a size of -1 are considered null
        if (packetHeader === -1) {
            return null;
        }
&nbsp;
        end = this._offset + packetHeader;
        start = this._offset;
&nbsp;
        if (end &gt; this._buffer.length) {
            throw new IncompleteReadBuffer('Wait for more data.');
        }
&nbsp;
        // set the offset to after the delimiter
        this._offset = end + 2;
&nbsp;
        return this._buffer.slice(start, end);
    } else if (type === 42) { // *
        offset = this._offset;
        packetHeader = this.parseHeader();
&nbsp;
        if (packetHeader === -1) {
            return null;
        }
&nbsp;
        if (packetHeader &gt; this._bytesRemaining()) {
            this._offset = offset - 1;
            throw new IncompleteReadBuffer('Wait for more data.');
        }
&nbsp;
        var reply = [];
        var ntype, i, res;
&nbsp;
        offset = this._offset - 1;
&nbsp;
        for (i = 0; i &lt; packetHeader; i++) {
            ntype = this._buffer[this._offset++];
&nbsp;
            <span class="missing-if-branch" title="if path not taken" >I</span>if (this._offset &gt; this._buffer.length) {
<span class="cstat-no" title="statement not covered" >                throw new IncompleteReadBuffer('Wait for more data.');</span>
            }
            res = this._parseResult(ntype);
            reply.push(res);
        }
&nbsp;
        return reply;
    }
};
&nbsp;
JavascriptReplyParser.prototype.execute = function (buffer) {
    this.append(buffer);
&nbsp;
    var type, ret, offset;
&nbsp;
    while (true) {
        offset = this._offset;
        // at least 4 bytes: :1\r\n
        if (this._bytesRemaining() &lt; 4) {
            break;
        }
&nbsp;
        try {
            type = this._buffer[this._offset++];
&nbsp;
            if (type === 43) { // Strings +
                ret = this._parseResult(type);
&nbsp;
                this.send_reply(ret);
            } else  if (type === 45) { // Errors -
                ret = this._parseResult(type);
&nbsp;
                this.send_error(ret);
            } else if (type === 58) { // Integers :
                ret = this._parseResult(type);
&nbsp;
                this.send_reply(ret);
            } else if (type === 36) { // Bulk strings $
                ret = this._parseResult(type);
&nbsp;
                this.send_reply(ret);
            } else if (type === 42) { // Arrays *
                // set a rewind point. if a failure occurs,
                // wait for the next execute()/append() and try again
                offset = this._offset - 1;
&nbsp;
                ret = this._parseResult(type);
&nbsp;
                this.send_reply(ret);
            } else if (type === 10 || type === 13) {
                break;
            } else {
                var err = new Error('Protocol error, got "' + String.fromCharCode(type) + '" as reply type byte');
                this.send_error(err);
            }
        } catch (err) {
            // catch the error (not enough data), rewind, and wait
            // for the next packet to appear
            this._offset = offset;
            break;
        }
    }
};
&nbsp;
JavascriptReplyParser.prototype.append = function (newBuffer) {
&nbsp;
    // out of data
    if (this._offset &gt;= this._buffer.length) {
        this._buffer = newBuffer;
        this._offset = 0;
        return;
    }
&nbsp;
    this._buffer = Buffer.concat([this._buffer.slice(this._offset), newBuffer]);
    this._offset = 0;
};
&nbsp;
JavascriptReplyParser.prototype.parseHeader = function () {
    var end   = this._packetEndOffset(),
        value = this._buffer.toString('ascii', this._offset, end - 1) | 0;
&nbsp;
    this._offset = end + 1;
&nbsp;
    return value;
};
&nbsp;
JavascriptReplyParser.prototype._packetEndOffset = function () {
    var offset = this._offset;
&nbsp;
    while (this._buffer[offset] !== 0x0d &amp;&amp; this._buffer[offset + 1] !== 0x0a) {
        offset++;
&nbsp;
        /* istanbul ignore if: activate the js parser out of memory test to test this */
        <span class="skip-if-branch" title="if path not taken" >I</span>if (offset &gt;= this._buffer.length) {
<span class="cstat-skip" title="statement not covered" >            throw new IncompleteReadBuffer('Did not see LF after NL reading multi bulk count (' + offset + ' =&gt; ' + this._buffer.length + ', ' + this._offset + ')');</span>
        }
    }
&nbsp;
    offset++;
    return offset;
};
&nbsp;
JavascriptReplyParser.prototype._bytesRemaining = function () {
    return (this._buffer.length - this._offset) &lt; 0 ? 0 : (this._buffer.length - this._offset);
};
&nbsp;
exports.Parser = JavascriptReplyParser;
exports.name = 'javascript';
&nbsp;</pre></td></tr>
</table></pre>

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