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[] = "$Id: ip_screen.c,v 8.4 1996/12/18 10:28:03 bostic Exp $ (Berkeley) $Date: 1996/12/18 10:28:03 $";
  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 "../ipc/ip.h"
  22 #include "extern.h"
  23
  24 /*
  25  * ip_screen --
  26  *      Initialize/shutdown the IP screen.
  27  *
  28  * PUBLIC: int ip_screen __P((SCR *, u_int32_t));
  29  */
  30 int
  31 ip_screen(sp, flags)
  32         SCR *sp;
  33         u_int32_t flags;
  34 {
  35         GS *gp;
  36         IP_PRIVATE *ipp;
  37
  38         gp = sp->gp;
  39         ipp = IPP(sp);
  40
  41         /* See if the current information is incorrect. */
  42         if (F_ISSET(gp, G_SRESTART)) {
  43                 if (ip_quit(gp))
  44                         return (1);
  45                 F_CLR(gp, G_SRESTART);
  46         }
  47
  48         /* See if we're already in the right mode. */
  49         if (LF_ISSET(SC_VI) && F_ISSET(ipp, IP_SCR_VI_INIT))
  50                 return (0);
  51
  52         /* Ex isn't possible. */
  53         if (LF_ISSET(SC_EX))
  54                 return (1);
  55
  56         /* Initialize terminal based information. */
  57         if (ip_term_init(sp))
  58                 return (1);
  59
  60         F_SET(ipp, IP_SCR_VI_INIT);
  61         return (0);
  62 }
  63
  64 /*
  65  * ip_quit --
  66  *      Shutdown the screens.
  67  *
  68  * PUBLIC: int ip_quit __P((GS *));
  69  */
  70 int
  71 ip_quit(gp)
  72         GS *gp;
  73 {
  74         IP_PRIVATE *ipp;
  75         int rval;
  76
  77         /* Clean up the terminal mappings. */
  78         rval = ip_term_end(gp);
  79
  80         ipp = GIPP(gp);
  81         F_CLR(ipp, IP_SCR_VI_INIT);
  82
  83         return (rval);
  84 }