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 */ 32 function CsvParser() { 33 }; 34 35 36 /** 37 * A regex for matching a CSV field. 38 * @private 39 */ 40 CsvParser.CSV_FIELD_RE_ = /^"((?:[^"]|"")*)"|([^,]*)/; 41 42 43 /** 44 * A regex for matching a double quote. 45 * @private 46 */ 47 CsvParser.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 */ 55 CsvParser.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
