    Special case binary symbology for encoding a 32 bit input, with
    optional triangular delimiters at each end.

    PostScript integers are 32 signed values so this code contains logic
    to avoid numeric overflows when converting the input to a binary
    string.

    Available options:

    symtype - EMS (default) / BOBST / anything else for custom type
    xwidth - width for wide bar for custom symbol type
    ywidth - width for spacing for custom symbol type
    zwidth - width for narrow bar for custom symbol type
    height - set symbol height in mm
    width - force symbol to given width in mm
    laterallsb, lateralmsb - triangular delimiters
    lsbgap, msbgap - width of the space between bar and diemark
    inkspread, includetext, textpos, textxpost, textfont, textsize,
    showborder, borderwidth, borderleft/right/top/bottom - usual meanings