Question

Our products use the Greenleaf Archive Library, an old compression library for Windows. We’re now looking to move to the mac, but I’m pretty sure the .lib files we got from Greenleaf won’t work on that platform.

Other than just switching to another compression library, which would be problematic for several reasons, does anyone know of any alternatives, like an open source version of the library or a mac port?

Answer 1

The 2.12 version of ArchiveLib we’ve got here shipped with full source code and builds fairly painlessly under various compilers.
Check your original install package and see if it has an option to install the source.

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Edit (much later): As I mentioned in the comments, there was one missing method in the source code. As the link I put there seems to have vanished, I’ve added the code below.

//
// void ALStorage::YieldTime()
//
// ARGUMENTS:
//
//  None.
//
// RETURNS
//
//  Nothing.
//
// DESCRIPTION
//
//  This function has two important things to do.  It gets called
//  at a few different points in the process of reading or writing data
//  from storage objects.  During normal reading and writing, it
//  will get called every time the buffer is loaded or flushed.
//
//  If we are in Windows mode, we execute a PeekMessage() loop.  This
//  makes sure that we aren't hogging the CPU.  By doing it this way,
//  the programmer can be ensure that he/she is being a good citizen
//  without any significant effort.
//
//  The second important function is that of calling the monitor function.
//  The user interface elements need to be updated regularly, and this
//  is done via this call.
//
// REVISION HISTORY
//
//   May 26, 1994  1.0A  : First release
//

void AL_PROTO ALStorage::YieldTime()
{
    if ( mpMonitor )
        mpMonitor->Progress( Tell(), *this );
    /*
     * For right now I am going to put the PeekMessage loop in the load
     * buffer routine by default.  Most Windows applications are going
     * to want to use this, right?
     */
#if defined( AL_WINDOWS_GUI )
    MSG msg;

    while ( PeekMessage( &msg, NULL, 0, 0, PM_REMOVE ) ) {
        TranslateMessage( &msg );
        DispatchMessage(&msg);
    }
#endif
}