Objective-C

Ascii85 Encoding and Decoding

See more Encryption Examples

Demonstrates ascii85 encoding and decoding.

Note: Requires Chilkat v9.5.0.79 or greater.

Objective-C

#import <CkoStringBuilder.h>
#import <NSString.h>
#import <CkoBinData.h>

BOOL success = NO;

//  First demonstrate encoding strings to ascii85 and back.
CkoStringBuilder *sb = [[CkoStringBuilder alloc] init];

success = [sb Append: @"Man is distinguished, not only by his reason, but by this singular passion from other animals, which is a lust of the mind, that by a perseverance of delight in the continued and indefatigable generation of knowledge, exceeds the short vehemence of any carnal pleasure."];

NSString *encodedAscii85 = [sb GetEncoded: @"ascii85" charset: @"utf-8"];
NSLog(@"%@",encodedAscii85);

//  Result is: 9jqo^BlbD-BleB1DJ+*+F(f,q/0JhKF<GL>Cj@.4 ... DII?(E,9)oF*2M7/c

//  Decode back to the original:
[sb Clear];
[sb Append: encodedAscii85];
success = [sb Decode: @"ascii85" charset: @"utf-8"];
NSLog(@"%@",@"Original:");
NSLog(@"%@",[sb GetAsString]);

//  ---- Now encode binary data to ascii85 ----
CkoBinData *bd = [[CkoBinData alloc] init];
success = [bd LoadFile: @"qa_data/jpg/starfish20.jpg"];
encodedAscii85 = [bd GetEncoded: @"ascii85"];
NSLog(@"%@",encodedAscii85);

//  Result is:  s4IA0!"_al8O`[\!<E0k!([(is8E!F7VQ[M+Eqj?FED)3+C]U=6"Fn ...

//  Decode...
[bd Clear];
[bd AppendEncoded: encodedAscii85 encoding: @"ascii85"];
success = [bd WriteFile: @"qa_output/starfish20.jpg"];