C++

Compress Text Feed to Binary

See more Compression Examples

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

#include <CkBinData.h>
#include <CkCompression.h>
#include <CkStringBuilder.h>

void ChilkatSample(void)
    {
    bool success = false;

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

    CkBinData bdCompressed;

    CkCompression compress;
    compress.put_Algorithm("deflate");
    compress.put_Charset("utf-8");

    CkStringBuilder sbUncompressedChunk;

    compress.put_FirstChunk(true);
    compress.put_LastChunk(false);

    int i;
    for (i = 0; i <= 24; i++) {
        if (i == 24) {
            compress.put_LastChunk(true);
        }

        sbUncompressedChunk.Clear();
        sbUncompressedChunk.AppendInt(i);
        sbUncompressedChunk.Append(": This is a line of data to be compressed...\r\n");

        compress.CompressSb(sbUncompressedChunk,bdCompressed);

        compress.put_FirstChunk(false);
    }

    // Show the compressed data in hex format:
    std::cout << "The hex encoded compressed text:" << "\r\n";
    std::cout << bdCompressed.getEncoded("hex") << "\r\n";

    // Now decompress in one call.  It is important to set both FirstChunk and LastChunk = true
    CkBinData bdDecompressed;
    compress.put_FirstChunk(true);
    compress.put_LastChunk(true);
    success = compress.DecompressBd2(bdCompressed,bdDecompressed);
    if (success == false) {
        std::cout << compress.lastErrorText() << "\r\n";
        return;
    }

    const char *originalText = bdDecompressed.getString("utf-8");
    std::cout << originalText << "\r\n";
    }