(C++) Decompress Gzip Data In-Place Using BinData

See more Gzip Examples

This example demonstrates how to use the UncompressBd method to decompress Gzip data stored in a BinData object.

The compressed .gz file is first loaded into memory. The UncompressBd method then decompresses the data in-place, meaning the original compressed bytes in the BinData object are replaced with the uncompressed data.

After decompression, the example writes the resulting data to a file. This approach is useful when working entirely in memory before saving or further processing the uncompressed data.

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#include <CkGzip.h>
#include <CkBinData.h>

void ChilkatSample(void)
    {
    bool success = false;

    // This example demonstrates how to decompress Gzip data stored in a BinData object.
    // The decompression is done in-place, replacing the compressed data with the original data.

    CkGzip gzip;
    CkBinData bd;

    // Load a .gz file into BinData:
    success = bd.LoadFile("example.txt.gz");
    if (success == false) {
        std::cout << bd.lastErrorText() << "\r\n";
        return;
    }

    std::cout << "Compressed size (bytes): " << bd.get_NumBytes() << "\r\n";

    // Uncompress the data in-place:
    success = gzip.UncompressBd(bd);
    if (success == false) {
        std::cout << gzip.lastErrorText() << "\r\n";
        return;
    }

    std::cout << "Decompressed size (bytes): " << bd.get_NumBytes() << "\r\n";

    // Save the uncompressed data to a file:
    success = bd.WriteFile("example.txt");
    if (success == false) {
        std::cout << bd.lastErrorText() << "\r\n";
        return;
    }

    std::cout << "File successfully uncompressed to example.txt" << "\r\n";
    }