rfc4180plus.js : この gist は http://gist.github.com/606500 に統合されました

rfc4180plus.js

function RFC4180Plus () {
  var

   CRLF = '(?:\r\n|[\r\n])',
   escaped = '"(?:""|[^"])*"',
   non_escaped = '[^\n\r",]*',
   field = '(?:' + escaped + '|' + non_escaped + ')',
   record = field + '(?:,' + field + ')*',
   file = record + '(?:' + CRLF + record + ')*' + CRLF + '?';

   this.non_escaped = new RegExp('^' + non_escaped + '$');
   this.file = new RegExp('^' + file + '$');
   this.convert_strings = new RegExp([
     ',',
     CRLF,
     escaped,
     non_escaped,
     '[\\s\\S]'
   ].join('|'), 'g');
}

RFC4180Plus.prototype.isCSV = function (csvString) {
  if ('string' !== typeof csvString) throw new TypeError(csvString + ' is not a string');
  return this.file.test(csvString);
};

RFC4180Plus.prototype.toArray = function (csvString) {
  if ('string' !== typeof csvString) throw new TypeError(csvString + ' is not a string');

  var non_escaped, callback, result, records, i, separatorAfterFlag;

  separatorAfterFlag = true;
  non_escaped = this.non_escaped;
  records = [[]];
  i = 0;

  callback = function (token) {
    switch (token.charAt(0)) {
      case '"':
        records[i].push(token.slice(1, token.length - 1).replace(/""/g, '"'));
        separatorAfterFlag = false;
        break;
      case ',':
        if (separatorAfterFlag) records[i].push('');
        separatorAfterFlag = true;
        break;
      case '\r':
      case '\n':
        if (separatorAfterFlag) records[i].push('');
        i++;
        records[i] = [];
        separatorAfterFlag = true;
        break;
      default:
        if (non_escaped.test(token)) {
          if (separatorAfterFlag) {
            records[i].push(token);
            separatorAfterFlag = false;
          }
        } else {
          throw new Error('not well-formed CSV (RFC 4180+)');
        }
        break;
    }
    return '';
  };

  result = csvString.replace(this.convert_strings, callback);
  callback = null;

  if (result.length !== 0 || records.length < 1) throw new Error('not well-formed CSV (RFC 4180+)');

  return records;
};

RFC4180Plus.prototype.toTable = function (csvString, doc, theadFlag) {
  if (typeof csvString !== 'string') throw new TypeError(csvString + ' is not a string');
  if (typeof doc !== 'object' || typeof Node === 'function' && doc.nodeType !== Node.DOCUMENT_NODE || doc.nodeType !== 9) throw new TypeError(doc + ' is not a document');

  var non_escaped, callback, result, table, tbody, rows, tr, cellElement, cells, i, separatorAfterFlag;

  separatorAfterFlag = true;
  non_escaped = this.non_escaped;
  table = doc.createElement('table');
  cellElement = theadFlag ? doc.createElement('th') : doc.createElement('td');
  tbody = theadFlag ? table.appendChild(doc.createElement('thead')) : table.appendChild(doc.createElement('tbody'));
  rows = tbody.rows;
  tr = tbody.insertRow(0);
  cells = tr.cells;
  i = 0;

  callback = function (token) {
    switch (token.charAt(0)) {
      case '"':
        tr.appendChild(cellElement.cloneNode(false)).appendChild(doc.createTextNode(token.slice(1, token.length - 1).replace(/""/g, '"')));
        separatorAfterFlag = false;
        break;
      case ',':
        if (separatorAfterFlag) tr.appendChild(cellElement.cloneNode(false));
        separatorAfterFlag = true;
        break;
      case '\r':
      case '\n':
        if (separatorAfterFlag) tr.appendChild(cellElement.cloneNode(false));
        if (theadFlag) {
          tbody = table.appendChild(doc.createElement('tbody'));
          rows = tbody.rows;
          cellElement = doc.createElement('td');
          theadFlag = false;
        }
        tr = tbody.insertRow(rows.length);
        cells = tr.cells;
        separatorAfterFlag = true;
        break;
      default:
        if (non_escaped.test(token)) {
          if (separatorAfterFlag) {
            tr.appendChild(cellElement.cloneNode(false)).appendChild(doc.createTextNode(token));
            separatorAfterFlag = false;
          }
        } else {
          throw new Error('not well-formed CSV (RFC 4180+)');
        }
        break;
    }
    return '';
  };

  result = csvString.replace(this.convert_strings, callback);
  callback = null;

  if (result.length !== 0 || cells.length === 0) throw new Error('not well-formed CSV (RFC 4180+)');

  return table;
};

rfc4180plus.js は rfc4180.js に統合されましたので、rfc4180.js の方を利用してください。(rfc4180plus.js はもう更新しません)

gist: 606500 (rfc4180.js) - GitHub
http://gist.github.com/606500