Acme.BookStore.HttpApi.Host/node_modules/ret/lib/util.js

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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;