v8/tools/csvparser.js

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// Copyright 2009 the V8 project authors. All rights reserved.
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following
// disclaimer in the documentation and/or other materials provided
// with the distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived
// from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
// Initlialize namespaces.
var devtools = devtools || {};
devtools.profiler = devtools.profiler || {};
/**
* Creates a CSV lines parser.
*/
devtools.profiler.CsvParser = function() {
};
/**
* A regex for matching a CSV field.
* @private
*/
devtools.profiler.CsvParser.CSV_FIELD_RE_ = /^"((?:[^"]|"")*)"|([^,]*)/;
/**
* A regex for matching a double quote.
* @private
*/
devtools.profiler.CsvParser.DOUBLE_QUOTE_RE_ = /""/g;
/**
* Parses a line of CSV-encoded values. Returns an array of fields.
*
* @param {string} line Input line.
*/
devtools.profiler.CsvParser.prototype.parseLine = function(line) {
var fieldRe = devtools.profiler.CsvParser.CSV_FIELD_RE_;
var doubleQuoteRe = devtools.profiler.CsvParser.DOUBLE_QUOTE_RE_;
var pos = 0;
var endPos = line.length;
var fields = [];
if (endPos > 0) {
do {
var fieldMatch = fieldRe.exec(line.substr(pos));
if (typeof fieldMatch[1] === "string") {
var field = fieldMatch[1];
pos += field.length + 3; // Skip comma and quotes.
fields.push(field.replace(doubleQuoteRe, '"'));
} else {
// The second field pattern will match anything, thus
// in the worst case the match will be an empty string.
var field = fieldMatch[2];
pos += field.length + 1; // Skip comma.
fields.push(field);
}
} while (pos <= endPos);
}
return fields;
};