How do I use Minizip (on Zlib)?

Question

I'm trying to archive files for a cross-platform application, and it looks like Minizip (built on zlib) is about as portable as archivers come.

When I try to run the following dummy code, however, I get a system error [my executable] has stopped working. Windows can check online for a solution to the problem.

Can anyone help me see how to use this library? — (there's no doc or tutorial anywhere that I can find)

zip_fileinfo zfi;

int main()
{
    zipFile zf = zipOpen("myarch.zip",APPEND_STATUS_ADDINZIP);
    int ret = zipOpenNewFileInZip(zf,
        "myfile.txt",
        &zfi,
        NULL,   0,
        NULL,   0,
        "my comment for this interior file",
        Z_DEFLATED,
        Z_NO_COMPRESSION
        );
    zipCloseFileInZip(zf);
    zipClose(zf, "my comment for exterior file");
    return 0;
}

Specs: Msys + MinGW, Windows 7, using zlibwapi.dll from zlib125dll.zip/dll32

Answer 1

Since I found this question via Google and it didn't contain any complete, working code, I am providing some here for future visitors.

int CreateZipFile (std::vector<wstring> paths)
{
    zipFile zf = zipOpen(std::string(destinationPath.begin(), destinationPath.end()).c_str(), APPEND_STATUS_CREATE);
    if (zf == NULL)
        return 1;

    bool _return = true;
    for (size_t i = 0; i < paths.size(); i++)
    {
        std::fstream file(paths[i].c_str(), std::ios::binary | std::ios::in);
        if (file.is_open())
        {
            file.seekg(0, std::ios::end);
            long size = file.tellg();
            file.seekg(0, std::ios::beg);

            std::vector<char> buffer(size);
            if (size == 0 || file.read(&buffer[0], size))
            {
                zip_fileinfo zfi = { 0 };
                std::wstring fileName = paths[i].substr(paths[i].rfind('\\')+1);

                if (S_OK == zipOpenNewFileInZip(zf, std::string(fileName.begin(), fileName.end()).c_str(), &zfi, NULL, 0, NULL, 0, NULL, Z_DEFLATED, Z_DEFAULT_COMPRESSION))
                {
                    if (zipWriteInFileInZip(zf, size == 0 ? "" : &buffer[0], size))
                        _return = false;

                    if (zipCloseFileInZip(zf))
                        _return = false;

                    file.close();
                    continue;
                }
            }
            file.close();
        }
        _return = false;
    }

    if (zipClose(zf, NULL))
        return 3;

    if (!_return)
        return 4;
    return S_OK;
}