Re: Curses And Informix?

>From: uunet!npri6.npri.com!jhagen (Jarom Hagen) >Date: 3 Apr 92 17:29:22 GMT >Message-Id: <5269@npri6.npri.com> >Subject: Curses And Informix? >X-Informix-List-Id: <news.968> > >Hi, > >I am trying to evaluate Informix and it looks good except for curses >handling. Apparently Informix has put several "curses" routines in >its libraries used for linking an executable. #include <disclaimer.h> Informix uses its own implementation of curses with termcap, and I think it uses its own version of terminfo too (though I'd stand to be corrected on that). This library originates way back in the long-lost mists of history, and need not bear any resemblance to any other form of termcap/terminfo library. It has never been documented that you can ever call any curses routines and have them work the way you expect. All that has been said is that you can use the termcap (and possibly terminfo) terminal definitions (with some Informix-only extensions if desired) to describe your terminal in a format that Informix will understand. Thus, any linking problems you have using curses are because you are doing unsupported things. If you wish to use curses yourself, you may do so, but you need to decide to do without any of Informix's termcap/terminfo stuff. Specifically, forget about form handling. Hence, you should be using ESQL/C, not Informix-4GL, because ESQL/C has no termcap routines in it. (Comment: it might coincidentally have one or two routines with the same name, but I haven't checked this out -- there are no routines deliberately with the same name. If there are name collisions, then you have a problem unless the two versions of the routine definitely have the same interface and functionality.) >I have run into the following problems: >1. I have to draw a form before I can use a curses routine called > from a C program. (Calling intscr() from a C program causes > the application to crash when a form is brought up.) >2. wclear() does not clear a window defined in a C program. >3. wprintw() is not defined. >4. I can't link with the curses library because I get multiple > definitions. >There may be other problems, but these make it hard if not unworkable >to use curses. > >Any help would be appreciated. >Jarom >------------------------------------------------------------------------------- > *Not paid for and/or endorsed by NPRI. 602 Cameron St, Alexandria VA 22314 > (UUCP: ...uunet!uupsi!npri6!jhagen) (Internet: jhagen@npri.com) Summary: don't use curses functions with I4GL -- it only causes grief. Jonathan Leffler (johnl@obelix.informix.com) #include <disclaimer.h>