contrib/nvi/ip/ip_screen.c

   1 /*-
   2  * Copyright (c) 1996
   3  *      Keith Bostic.  All rights reserved.
   4  *
   5  * See the LICENSE file for redistribution information.
   6  */
   7
   8 #include "config.h"
   9
  10 #ifndef lint
  11 static const char sccsid[] = "@(#)ip_screen.c   8.2 (Berkeley) 10/13/96";
  12 #endif /* not lint */
  13
  14 #include <sys/types.h>
  15 #include <sys/queue.h>
  16
  17 #include <bitstring.h>
  18 #include <stdio.h>
  19
  20 #include "../common/common.h"
  21 #include "ip.h"
  22
  23 /*
  24  * ip_screen --
  25  *      Initialize/shutdown the IP screen.
  26  *
  27  * PUBLIC: int ip_screen __P((SCR *, u_int32_t));
  28  */
  29 int
  30 ip_screen(sp, flags)
  31         SCR *sp;
  32         u_int32_t flags;
  33 {
  34         GS *gp;
  35         IP_PRIVATE *ipp;
  36
  37         gp = sp->gp;
  38         ipp = IPP(sp);
  39
  40         /* See if the current information is incorrect. */
  41         if (F_ISSET(gp, G_SRESTART)) {
  42                 if (ip_quit(gp))
  43                         return (1);
  44                 F_CLR(gp, G_SRESTART);
  45         }
  46
  47         /* See if we're already in the right mode. */
  48         if (LF_ISSET(SC_VI) && F_ISSET(ipp, IP_SCR_VI_INIT))
  49                 return (0);
  50
  51         /* Ex isn't possible. */
  52         if (LF_ISSET(SC_EX))
  53                 return (1);
  54
  55         /* Initialize terminal based information. */
  56         if (ip_term_init(sp))
  57                 return (1);
  58
  59         /* Put up the first file name. */
  60         if (ip_rename(sp))
  61                 return (1);
  62
  63         F_SET(ipp, IP_SCR_VI_INIT);
  64         return (0);
  65 }
  66
  67 /*
  68  * ip_quit --
  69  *      Shutdown the screens.
  70  *
  71  * PUBLIC: int ip_quit __P((GS *));
  72  */
  73 int
  74 ip_quit(gp)
  75         GS *gp;
  76 {
  77         IP_PRIVATE *ipp;
  78         int rval;
  79
  80         /* Clean up the terminal mappings. */
  81         rval = ip_term_end(gp);
  82
  83         ipp = GIPP(gp);
  84         F_CLR(ipp, IP_SCR_VI_INIT);
  85
  86         return (rval);
  87 }