(Objective-C) Compress String Feed to Base64

This example receives incoming text data in chunks, compresses as a stream, and accumulates the compressed data in base64.

The purpose is to demonstrate the BeginCompressStringENC, MoreCompressStringENC, and EndCompressStringENC methods.

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

// This example assumes the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

BOOL success;
CkoStringBuilder *sbCompressedBase64 = [[CkoStringBuilder alloc] init];

CkoCompression *compress = [[CkoCompression alloc] init];
compress.Algorithm = @"deflate";
compress.Charset = @"utf-8";
compress.EncodingMode = @"base64";

CkoStringBuilder *sbIndex = [[CkoStringBuilder alloc] init];

int i;
for (i = 0; i <= 24; i++) {
    // Note: It is possible (and normal) for a BeginCompress* or MoreCompress* method to return
    // an empty string (or 0 bytes).  When this happens, the input data is not lost.  It will be flushed
    // in a subsequent call.
    [sbIndex Clear];
    [sbIndex AppendInt: [NSNumber numberWithInt: i]];
    if (i == 0) {
        [sbCompressedBase64 Append: [compress BeginCompressStringENC: [sbIndex GetAsString]]];
    }
    else {
        [sbCompressedBase64 Append: [compress MoreCompressStringENC: [sbIndex GetAsString]]];
    }

    [sbCompressedBase64 Append: [compress MoreCompressStringENC: @": This is a line of data to be compressed...\r\n"]];
}

// Flush any remaining output.
[sbCompressedBase64 Append: [compress EndCompressStringENC]];

NSLog(@"%@",@"The base64 encoded compressed text:");
NSLog(@"%@",[sbCompressedBase64 GetAsString]);

// Now decompress in one call:
NSString *originalText = [compress DecompressStringENC: [sbCompressedBase64 GetAsString]];
NSLog(@"%@",originalText);