C

Compress and Decompress a String

See more Compression Examples

Demonstrates how to compress and decompress a string. C

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

void ChilkatSample(void)
    {
    BOOL success;
    HCkStringBuilder sb;
    int i;
    HCkCompression compress;
    HCkByteData compressedBytes;
    const char *compressedBase64;
    const char *decompressedString;

    success = FALSE;

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

    sb = CkStringBuilder_Create();

    for (i = 1; i <= 20; i++) {
        CkStringBuilder_Append(sb,"This is the original uncompressed string.\r\n");
    }

    compress = CkCompression_Create();
    CkCompression_putAlgorithm(compress,"deflate");
    //  Indicate that the utf-8 byte representation of the string should be compressed.
    CkCompression_putCharset(compress,"utf-8");

    compressedBytes = CkByteData_Create();
    success = CkCompression_CompressString(compress,CkStringBuilder_getAsString(sb),compressedBytes);

    //  If the compressed data is desired in string format, then get the base64 representation of the bytes.
    CkCompression_putEncodingMode(compress,"base64");
    compressedBase64 = CkCompression_compressStringENC(compress,CkStringBuilder_getAsString(sb));
    printf("Compressed Bytes as Base64: %s\n",compressedBase64);

    //  Now decompress...
    decompressedString = CkCompression_decompressString(compress,compressedBytes);
    printf("The original string after decompressing from binary compressed data:\n");
    printf("%s\n",decompressedString);

    //  To decompress from Base64...
    CkCompression_putEncodingMode(compress,"base64");
    decompressedString = CkCompression_decompressStringENC(compress,compressedBase64);
    printf("The original string after decompressing from Base64:\n");
    printf("%s\n",decompressedString);


    CkStringBuilder_Dispose(sb);
    CkCompression_Dispose(compress);
    CkByteData_Dispose(compressedBytes);

    }