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Diffstat (limited to 'src/3rdparty/v8/tools/csvparser.js')
-rw-r--r-- | src/3rdparty/v8/tools/csvparser.js | 78 |
1 files changed, 78 insertions, 0 deletions
diff --git a/src/3rdparty/v8/tools/csvparser.js b/src/3rdparty/v8/tools/csvparser.js new file mode 100644 index 0000000..c7d46b5 --- /dev/null +++ b/src/3rdparty/v8/tools/csvparser.js @@ -0,0 +1,78 @@ +// 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. + + +/** + * Creates a CSV lines parser. + */ +function CsvParser() { +}; + + +/** + * A regex for matching a CSV field. + * @private + */ +CsvParser.CSV_FIELD_RE_ = /^"((?:[^"]|"")*)"|([^,]*)/; + + +/** + * A regex for matching a double quote. + * @private + */ +CsvParser.DOUBLE_QUOTE_RE_ = /""/g; + + +/** + * Parses a line of CSV-encoded values. Returns an array of fields. + * + * @param {string} line Input line. + */ +CsvParser.prototype.parseLine = function(line) { + var fieldRe = CsvParser.CSV_FIELD_RE_; + var doubleQuoteRe = 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; +}; |