/*

    Copyright (C) 2016 Apple Inc. All Rights Reserved.

    See LICENSE.txt for this sample’s licensing information

    Abstract:

    Implements Base64 decoding.

 */

@import Foundation;

NS_ASSUME_NONNULL_BEGIN

// Decodes a Base64 string to data.  This does not do anything particularly clever 

// (it does skip whitespace but, for example, it won't skip a PEM header or PEM footer). 

/*! Decodes a Base64 string to data.

 *  \details This only handles plain Base64 data.  Specifically, it has not skip whitespace, 

 *      nor will it deal with PEM headers and footers.

 */

@interface QCCBase64Decode : NSOperation

/*! Initialise the object to decide the supplied string.

 *  \param inputString The data to encode; this may be empty.

 *  \returns The initialised object.

 */

- (instancetype)initWithInputString:(NSString *)inputString NS_DESIGNATED_INITIALIZER;

- (instancetype)init NS_UNAVAILABLE;

/*! The data to decode.

 *  \details This is set by the init method.

 */

@property (atomic, copy,   readonly ) NSString *            inputString;

/*! The decode data. 

 *  \details This is set when the operation is finished.  This will be nil if there was 

 *      an error decoding the Base64 string.

 */

@property (atomic, copy,   readonly, nullable) NSData *     outputData;

@end

NS_ASSUME_NONNULL_END