Unicode 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. Unicode C++

#include <CkBinDataW.h>
#include <CkCompressionW.h>
#include <CkStringBuilderW.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.

    CkBinDataW bdCompressed;

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

    CkStringBuilderW 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(L": 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:
    wprintf(L"The hex encoded compressed text:\n");
    wprintf(L"%s\n",bdCompressed.getEncoded(L"hex"));

    // Now decompress in one call.  It is important to set both FirstChunk and LastChunk = true
    CkBinDataW bdDecompressed;
    compress.put_FirstChunk(true);
    compress.put_LastChunk(true);
    success = compress.DecompressBd2(bdCompressed,bdDecompressed);
    if (success == false) {
        wprintf(L"%s\n",compress.lastErrorText());
        return;
    }

    const wchar_t *originalText = bdDecompressed.getString(L"utf-8");
    wprintf(L"%s\n",originalText);
    }