NAME
    CurrentChunk -- Get context node for current chunk.

SYNOPSIS
    top = CurrentChunk (iff)
    d0                  a0

    struct contextnode        *top;
    struct iffhandle  *iff;

FUNCTION
    Returns top context node for the given iffhandle struct.  the top
    context node corresponds to the chunk most recently pushed on the
    stack, which is the chunk where the stream is currently positioned.
    The contextnode structure contains information on the type of chunk
    currently being parsed (or written), its size and the current
    position within the chunk.

INPUTS
    iff     - pointer to iffhandle struct.

RESULT
    top     - pointer to top context node or NULL if none.

EXAMPLE

NOTES

BUGS

SEE ALSO
    pushchunk(), popchunk(), parseiff(), parentchunk()