text: /*
   * Copyright 2012 ZXing authors
   *
   * 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>
  
  @class ZXQRCodeVersion;
  
  /**
   * See ISO 18004:2006, 6.4.1, Tables 2 and 3. This enum encapsulates the various modes in which
   * data can be encoded to bits in the QR code standard.
   */
  @interface ZXQRCodeMode : NSObject
  
  @property (nonatomic, assign, readonly) int bits;
  @property (nonatomic, copy, readonly) NSString *name;
  
  - (id)initWithCharacterCountBitsForVersions:(NSArray *)characterCountBitsForVersions bits:(int)bits name:(NSString *)name;
  
  /**
   * @param bits four bits encoding a QR Code data mode
   * @return Mode encoded by these bits or nil if bits do not correspond to a known mode
   */
  + (ZXQRCodeMode *)forBits:(int)bits;
  
  /**
   * @param version version in question
   * @return number of bits used, in this QR Code symbol `ZXQRCodeVersion`, to encode the
   *   count of characters that will follow encoded in this Mode
   */
  - (int)characterCountBits:(ZXQRCodeVersion *)version;
  
  + (ZXQRCodeMode *)terminatorMode; // Not really a mode...
  + (ZXQRCodeMode *)numericMode;
  + (ZXQRCodeMode *)alphanumericMode;
  + (ZXQRCodeMode *)structuredAppendMode; // Not supported
  + (ZXQRCodeMode *)byteMode;
  + (ZXQRCodeMode *)eciMode; // character counts don't apply
  + (ZXQRCodeMode *)kanjiMode;
  + (ZXQRCodeMode *)fnc1FirstPositionMode;
  + (ZXQRCodeMode *)fnc1SecondPositionMode;
  
  /** See GBT 18284-2000; "Hanzi" is a transliteration of this mode name. */
  + (ZXQRCodeMode *)hanziMode;
  
  @end
  