var toString = require('../lang/toString');
var WHITE_SPACES = require('./WHITE_SPACES');
    /**
     * Remove chars from end of string.
     */
    function rtrim(str, chars) {
        str = toString(str);
        chars = chars || WHITE_SPACES;

        var end = str.length - 1,
            charLen = chars.length,
            found = true,
            i, c;

        while (found && end >= 0) {
            found = false;
            i = -1;
            c = str.charAt(end);

            while (++i < charLen) {
                if (c === chars[i]) {
                    found = true;
                    end--;
                    break;
                }
            }
        }

        return (end >= 0) ? str.substring(0, end + 1) : '';
    }

    module.exports = rtrim;