(C) Compress Text Feed to Binary

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

The purpose is to demonstrate the BeginCompressString, MoreCompressString, and EndCompressString methods.

Chilkat C/C++ Library Downloads
MS Visual C/C++ Linux/CentOS C/C++ Alpine Linux C/C++ MAC OS X C/C++	armhf/aarch64 C/C++ C++ Builder iOS C/C++ Android C/C++	Solaris C/C++ MinGW C/C++

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

void ChilkatSample(void)
    {
    BOOL success;
    HCkBinData compressedData;
    HCkByteData compressedBytes;
    HCkCompression compress;
    HCkStringBuilder sbIndex;
    int i;
    const char *originalText;

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

    compressedData = CkBinData_Create();
    compressedBytes = CkByteData_Create();

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

    sbIndex = CkStringBuilder_Create();

    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.
        CkStringBuilder_Clear(sbIndex);
        CkStringBuilder_AppendInt(sbIndex,i);
        if (i == 0) {
            success = CkCompression_BeginCompressString(compress,CkStringBuilder_getAsString(sbIndex),compressedBytes);
        }
        else {
            success = CkCompression_MoreCompressString(compress,CkStringBuilder_getAsString(sbIndex),compressedBytes);
        }

        CkBinData_AppendBinary(compressedData,compressedBytes);
        success = CkCompression_MoreCompressString(compress,": This is a line of data to be compressed...\r\n",compressedBytes);
        CkBinData_AppendBinary(compressedData,compressedBytes);
    }

    // Flush any remaining output.
    success = CkCompression_EndCompressString(compress,compressedBytes);
    CkBinData_AppendBinary(compressedData,compressedBytes);

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

    // Now decompress in one call:
    success = CkBinData_GetBinary(compressedData,compressedBytes);
    originalText = CkCompression_decompressString(compress,compressedBytes);
    printf("%s\n",originalText);


    CkBinData_Dispose(compressedData);
    CkByteData_Dispose(compressedBytes);
    CkCompression_Dispose(compress);
    CkStringBuilder_Dispose(sbIndex);

    }