1 // Copyright 2009 the V8 project authors. All rights reserved.
2 // Redistribution and use in source and binary forms, with or without
3 // modification, are permitted provided that the following conditions are
6 // * Redistributions of source code must retain the above copyright
7 // notice, this list of conditions and the following disclaimer.
8 // * Redistributions in binary form must reproduce the above
9 // copyright notice, this list of conditions and the following
10 // disclaimer in the documentation and/or other materials provided
11 // with the distribution.
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13 // contributors may be used to endorse or promote products derived
14 // from this software without specific prior written permission.
16 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
17 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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30 * Creates a CSV lines parser.
32 function CsvParser() {
37 * A regex for matching a CSV field.
40 CsvParser.CSV_FIELD_RE_ = /^"((?:[^"]|"")*)"|([^,]*)/;
44 * A regex for matching a double quote.
47 CsvParser.DOUBLE_QUOTE_RE_ = /""/g;
51 * Parses a line of CSV-encoded values. Returns an array of fields.
53 * @param {string} line Input line.
55 CsvParser.prototype.parseLine = function(line) {
56 var fieldRe = CsvParser.CSV_FIELD_RE_;
57 var doubleQuoteRe = CsvParser.DOUBLE_QUOTE_RE_;
59 var endPos = line.length;
63 var fieldMatch = fieldRe.exec(line.substr(pos));
64 if (typeof fieldMatch[1] === "string") {
65 var field = fieldMatch[1];
66 pos += field.length + 3; // Skip comma and quotes.
67 fields.push(field.replace(doubleQuoteRe, '"'));
69 // The second field pattern will match anything, thus
70 // in the worst case the match will be an empty string.
71 var field = fieldMatch[2];
72 pos += field.length + 1; // Skip comma.
75 } while (pos <= endPos);