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Dir : ~/var/www/invoice/node_modules/ret/lib/

Edit File: util.js

var types = require('./types');
var sets  = require('./sets');

// All of these are private and only used by randexp.
// It's assumed that they will always be called with the correct input.

var CTRL = '@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]^ ?';
var SLSH = { '0': 0, 't': 9, 'n': 10, 'v': 11, 'f': 12, 'r': 13 };

/**
 * Finds character representations in str and convert all to
 * their respective characters
 *
 * @param {String} str
 * @return {String}
 */
exports.strToChars = function(str) {
  /* jshint maxlen: false */
  var chars_regex = /(\[\\b\])|(\\)?\\(?:u([A-F0-9]{4})|x([A-F0-9]{2})|(0?[0-7]{2})|c([@A-Z\[\\\]\^?])|([0tnvfr]))/g;
  str = str.replace(chars_regex, function(s, b, lbs, a16, b16, c8, dctrl, eslsh) {
    if (lbs) {
      return s;
    }

var code = b     ? 8 :
               a16   ? parseInt(a16, 16) :
               b16   ? parseInt(b16, 16) :
               c8    ? parseInt(c8,   8) :
               dctrl ? CTRL.indexOf(dctrl) :
               SLSH[eslsh];

var c = String.fromCharCode(code);

// Escape special regex characters.
    if (/[\[\]{}\^$.|?*+()]/.test(c)) {
      c = '\\' + c;
    }

return c;
  });

return str;
};

/**
 * turns class into tokens
 * reads str until it encounters a ] not preceeded by a \
 *
 * @param {String} str
 * @param {String} regexpStr
 * @return {Array.<Array.<Object>, Number>}
 */
exports.tokenizeClass = function(str, regexpStr) {
  /* jshint maxlen: false */
  var tokens = [];
  var regexp = /\$?:(w)|(d)|(s)|(W)|(D)|(S))|((?:(?:\$(.)|([^\]\\]))-(?:\\)?([^\]]))|(\])|(?:\\)?(.)/g;
  var rs, c;

while ((rs = regexp.exec(str)) != null) {
    if (rs[1]) {
      tokens.push(sets.words());

} else if (rs[2]) {
      tokens.push(sets.ints());

} else if (rs[3]) {
      tokens.push(sets.whitespace());

} else if (rs[4]) {
      tokens.push(sets.notWords());

} else if (rs[5]) {
      tokens.push(sets.notInts());

} else if (rs[6]) {
      tokens.push(sets.notWhitespace());

} else if (rs[7]) {
      tokens.push({
        type: types.RANGE,
        from: (rs[8] || rs[9]).charCodeAt(0),
          to: rs[10].charCodeAt(0),
      });

} else if (c = rs[12]) {
      tokens.push({
        type: types.CHAR,
        value: c.charCodeAt(0),
      });

} else {
      return [tokens, regexp.lastIndex];
    }
  }

exports.error(regexpStr, 'Unterminated character class');
};

/**
 * Shortcut to throw errors.
 *
 * @param {String} regexp
 * @param {String} msg
 */
exports.error = function(regexp, msg) {
  throw new SyntaxError('Invalid regular expression: /' + regexp + '/: ' + msg);
};