'use strict';
  
  var assign        = require('es5-ext/object/assign')
    , normalizeOpts = require('es5-ext/object/normalize-options')
    , isCallable    = require('es5-ext/object/is-callable')
    , contains      = require('es5-ext/string/#/contains')
  
    , d;
  
  d = module.exports = function (dscr, value/*, options*/) {
  	var c, e, w, options, desc;
  	if ((arguments.length < 2) || (typeof dscr !== 'string')) {
  		options = value;
  		value = dscr;
  		dscr = null;
  	} else {
  		options = arguments[2];
  	}
  	if (dscr == null) {
  		c = w = true;
  		e = false;
  	} else {
  		c = contains.call(dscr, 'c');
  		e = contains.call(dscr, 'e');
  		w = contains.call(dscr, 'w');
  	}
  
  	desc = { value: value, configurable: c, enumerable: e, writable: w };
  	return !options ? desc : assign(normalizeOpts(options), desc);
  };
  
  d.gs = function (dscr, get, set/*, options*/) {
  	var c, e, options, desc;
  	if (typeof dscr !== 'string') {
  		options = set;
  		set = get;
  		get = dscr;
  		dscr = null;
  	} else {
  		options = arguments[3];
  	}
  	if (get == null) {
  		get = undefined;
  	} else if (!isCallable(get)) {
  		options = get;
  		get = set = undefined;
  	} else if (set == null) {
  		set = undefined;
  	} else if (!isCallable(set)) {
  		options = set;
  		set = undefined;
  	}
  	if (dscr == null) {
  		c = true;
  		e = false;
  	} else {
  		c = contains.call(dscr, 'c');
  		e = contains.call(dscr, 'e');
  	}
  
  	desc = { get: get, set: set, configurable: c, enumerable: e };
  	return !options ? desc : assign(normalizeOpts(options), desc);
  };