/*
|
* Copyright 2006 Jeremias Maerki in part, and ZXing Authors in part
|
*
|
* 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.
|
*/
|
|
/**
|
* PDF417 error correction code following the algorithm described in ISO/IEC 15438:2001(E) in
|
* chapter 4.10.
|
*/
|
@interface ZXPDF417ErrorCorrection : NSObject
|
|
/**
|
* Determines the number of error correction codewords for a specified error correction
|
* level.
|
*
|
* @param errorCorrectionLevel the error correction level (0-8)
|
* @return the number of codewords generated for error correction
|
*/
|
|
+ (int)errorCorrectionCodewordCount:(int)errorCorrectionLevel;
|
|
/**
|
* Returns the recommended minimum error correction level as described in annex E of
|
* ISO/IEC 15438:2001(E).
|
*
|
* @param n the number of data codewords
|
* @return the recommended minimum error correction level
|
*/
|
+ (int)recommendedMinimumErrorCorrectionLevel:(int)n error:(NSError **)error;
|
|
/**
|
* Generates the error correction codewords according to 4.10 in ISO/IEC 15438:2001(E).
|
*
|
* @param dataCodewords the data codewords
|
* @param errorCorrectionLevel the error correction level (0-8)
|
* @return the String representing the error correction codewords
|
*/
|
+ (NSString *)generateErrorCorrection:(NSString *)dataCodewords errorCorrectionLevel:(int)errorCorrectionLevel;
|
|
@end
|
