text: /* Copyright (c) 2012 Google Inc.
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *     http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  #import <Foundation/Foundation.h>
  
  NSData *GTLDecodeBase64(NSString *base64Str);
  NSString *GTLEncodeBase64(NSData *data);
  
  // "Web-safe" encoding substitutes - and _ for + and / in the encoding table,
  // per http://www.ietf.org/rfc/rfc4648.txt section 5.
  
  NSData *GTLDecodeWebSafeBase64(NSString *base64Str);
  NSString *GTLEncodeWebSafeBase64(NSData *data);
  