(Unicode 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 <CkGzipW.h>
#include <CkBinDataW.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.

    CkGzipW gzip;
    CkBinDataW bd;

    // Load a .gz file into BinData:
    success = bd.LoadFile(L"example.txt.gz");
    if (success == false) {
        wprintf(L"%s\n",bd.lastErrorText());
        return;
    }

    wprintf(L"Compressed size (bytes): %d\n",bd.get_NumBytes());

    // Uncompress the data in-place:
    success = gzip.UncompressBd(bd);
    if (success == false) {
        wprintf(L"%s\n",gzip.lastErrorText());
        return;
    }

    wprintf(L"Decompressed size (bytes): %d\n",bd.get_NumBytes());

    // Save the uncompressed data to a file:
    success = bd.WriteFile(L"example.txt");
    if (success == false) {
        wprintf(L"%s\n",bd.lastErrorText());
        return;
    }

    wprintf(L"File successfully uncompressed to example.txt\n");
    }