Abstract

Requests and Responses Working from the C-TIP routine headers of Figure 1, it is a straightforward exercise to write most of the corresponding definitions of TipRequest and TipResponse shown in Figure 2. The introduction of the type YX for screen co-ordinates is perhaps the most immediately apparent change, but other less obvious changes are more significant. The new relationship of function and argument between TIP and the application means, first, that there is no need for requests Tstart or Tstop: tip simply wraps the evaluation of its argument in an appropriate context. Secondly, data TipRequest = data TipResponse = Tbell Tkey Char --- Tbox YX YX --- Tres Response --- Tnobox YX YX --- Tvoid --- Ttitle String YX YX --- Tyx YX --- Tclear --- Tmove YX --- Trelmove YX --- Tprintf YX Int String [String] --- Tputc Char --- Tputs String --- Tread --- Trefresh type YX = (Int,Int) --- Treq Request --- Tmax --- Tpos Figure 2: Level 1 H-TIP Interface. since tip controls all I/O on behalf...

Citations