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 <C_CkBinData.h>
#include <C_CkCompression.h>
#include <C_CkStringBuilder.h>

void ChilkatSample(void)
    {
    BOOL success;
    HCkBinData bdCompressed;
    HCkCompression compress;
    HCkStringBuilder sbUncompressedChunk;
    int i;
    HCkBinData bdDecompressed;
    const char *originalText;

    success = FALSE;

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

    bdCompressed = CkBinData_Create();

    compress = CkCompression_Create();
    CkCompression_putAlgorithm(compress,"deflate");
    CkCompression_putCharset(compress,"utf-8");

    sbUncompressedChunk = CkStringBuilder_Create();

    CkCompression_putFirstChunk(compress,TRUE);
    CkCompression_putLastChunk(compress,FALSE);

    for (i = 0; i <= 24; i++) {
        if (i == 24) {
            CkCompression_putLastChunk(compress,TRUE);
        }

        CkStringBuilder_Clear(sbUncompressedChunk);
        CkStringBuilder_AppendInt(sbUncompressedChunk,i);
        CkStringBuilder_Append(sbUncompressedChunk,": This is a line of data to be compressed...\r\n");

        CkCompression_CompressSb(compress,sbUncompressedChunk,bdCompressed);

        CkCompression_putFirstChunk(compress,FALSE);
    }

    // Show the compressed data in hex format:
    printf("The hex encoded compressed text:\n");
    printf("%s\n",CkBinData_getEncoded(bdCompressed,"hex"));

    // Now decompress in one call.  It is important to set both FirstChunk and LastChunk = TRUE
    bdDecompressed = CkBinData_Create();
    CkCompression_putFirstChunk(compress,TRUE);
    CkCompression_putLastChunk(compress,TRUE);
    success = CkCompression_DecompressBd2(compress,bdCompressed,bdDecompressed);
    if (success == FALSE) {
        printf("%s\n",CkCompression_lastErrorText(compress));
        CkBinData_Dispose(bdCompressed);
        CkCompression_Dispose(compress);
        CkStringBuilder_Dispose(sbUncompressedChunk);
        CkBinData_Dispose(bdDecompressed);
        return;
    }

    originalText = CkBinData_getString(bdDecompressed,"utf-8");
    printf("%s\n",originalText);


    CkBinData_Dispose(bdCompressed);
    CkCompression_Dispose(compress);
    CkStringBuilder_Dispose(sbUncompressedChunk);
    CkBinData_Dispose(bdDecompressed);

    }