Also compare to Emacs' bindat package: http://www.gnu.org/software/emacs/elisp/html_node/Byte-Packing.html http://www.gnu.org/software/emacs/elisp/html_node/Byt

Also compare to Emacs' bindat package: http://www.gnu.org/software/emacs/elisp/html_node/Byte-Packing.html http://www.gnu.org/software/emacs/elisp/html_node/Byte-Packi... It seems that the seek & tell example from this blog post could mostly be implemented in bindat through the mere datatype definitions, as they allow for variable length sequences and for skip operations.