(Unicode C) GZip Create / Extract .gz File

Demonstrates how to compress a file to create a .gz (GZip) file.

Note: The .gz file format is a compressed file format. It contains a single file. The .gz file format is not an archive format (i.e. it does not contain a collection of files/directories such as with the .zip, .rar, or .tar file formats). GZip is often combined with TAR to create a .tgz (or .tar.gz).

Note: It is possible for a .gz to contain more than one file, but this is very uncommon.

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#include <C_CkGzipW.h>

void ChilkatSample(void)
    {
    HCkGzipW gzip;
    BOOL success;
    const wchar_t *xmlStr;

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

    gzip = CkGzipW_Create();

    // File-to-file GZip:
    // Compress "hamlet.xml" to create "hamlet.xml.gz"
    success = CkGzipW_CompressFile(gzip,L"hamlet.xml",L"hamlet.xml.gz");
    if (success != TRUE) {
        wprintf(L"%s\n",CkGzipW_lastErrorText(gzip));
        CkGzipW_Dispose(gzip);
        return;
    }

    // File-to-file ungzip
    // Decompress "hamlet.xml.gz" to create "hamletOut.xml"
    success = CkGzipW_UncompressFile(gzip,L"hamlet.xml.gz",L"hamletOut.xml");
    if (success != TRUE) {
        wprintf(L"%s\n",CkGzipW_lastErrorText(gzip));
        CkGzipW_Dispose(gzip);
        return;
    }

    // File-to-string ungzip
    // Decompress the contents of a .gz directly to a string variable:
    // The 2nd argument indicates the charset of the character
    // data after it is decompressed.

    xmlStr = CkGzipW_uncompressFileToString(gzip,L"hamlet.xml.gz",L"utf-8");
    if (success != TRUE) {
        wprintf(L"%s\n",CkGzipW_lastErrorText(gzip));
        CkGzipW_Dispose(gzip);
        return;
    }

    wprintf(L"%s\n",xmlStr);

    // The Chilkat GZip API provides much more flexibility than shown
    // here.  See the reference documentation at 
    // http://www.chilkatsoft.com/refdoc for more information


    CkGzipW_Dispose(gzip);

    }