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 4// met: 5// 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. 12// * Neither the name of Google Inc. nor the names of its 13// contributors may be used to endorse or promote products derived 14// from this software without specific prior written permission. 15// 16// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 18// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 19// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 20// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 21// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 22// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 26// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 28 29/** 30 * Creates a CSV lines parser. 31 */ 32function CsvParser() { 33}; 34 35 36/** 37 * A regex for matching a CSV field. 38 * @private 39 */ 40CsvParser.CSV_FIELD_RE_ = /^"((?:[^"]|"")*)"|([^,]*)/; 41 42 43/** 44 * A regex for matching a double quote. 45 * @private 46 */ 47CsvParser.DOUBLE_QUOTE_RE_ = /""/g; 48 49 50/** 51 * Parses a line of CSV-encoded values. Returns an array of fields. 52 * 53 * @param {string} line Input line. 54 */ 55CsvParser.prototype.parseLine = function(line) { 56 var fieldRe = CsvParser.CSV_FIELD_RE_; 57 var doubleQuoteRe = CsvParser.DOUBLE_QUOTE_RE_; 58 var pos = 0; 59 var endPos = line.length; 60 var fields = []; 61 if (endPos > 0) { 62 do { 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, '"')); 68 } else { 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. 73 fields.push(field); 74 } 75 } while (pos <= endPos); 76 } 77 return fields; 78}; 79