contrib/nvi/ex/ex_tcl.c

   1 /*-
   2  * Copyright (c) 1992, 1993, 1994
   3  *      The Regents of the University of California.  All rights reserved.
   4  * Copyright (c) 1992, 1993, 1994, 1995, 1996
   5  *      Keith Bostic.  All rights reserved.
   6  * Copyright (c) 1995
   7  *      George V. Neville-Neil.  All rights reserved.
   8  *
   9  * See the LICENSE file for redistribution information.
  10  */
  11
  12 #include "config.h"
  13
  14 #ifndef lint
  15 static const char sccsid[] = "@(#)ex_tcl.c      8.10 (Berkeley) 9/15/96";
  16 #endif /* not lint */
  17
  18 #include <sys/types.h>
  19 #include <sys/queue.h>
  20
  21 #include <bitstring.h>
  22 #include <limits.h>
  23 #include <stdio.h>
  24 #include <string.h>
  25 #include <termios.h>
  26 #include <unistd.h>
  27
  28 #include "../common/common.h"
  29
  30 #ifdef HAVE_TCL_INTERP
  31 #include <tcl.h>
  32 #endif
  33
  34 /*
  35  * ex_tcl -- :[line [,line]] tcl [command]
  36  *      Run a command through the tcl interpreter.
  37  *
  38  * PUBLIC: int ex_tcl __P((SCR*, EXCMD *));
  39  */
  40 int
  41 ex_tcl(sp, cmdp)
  42         SCR *sp;
  43         EXCMD *cmdp;
  44 {
  45 #ifdef HAVE_TCL_INTERP
  46         CHAR_T *p;
  47         GS *gp;
  48         size_t len;
  49         char buf[128];
  50
  51         /* Initialize the interpreter. */
  52         gp = sp->gp;
  53         if (gp->tcl_interp == NULL && tcl_init(gp))
  54                 return (1);
  55
  56         /* Skip leading white space. */
  57         if (cmdp->argc != 0)
  58                 for (p = cmdp->argv[0]->bp,
  59                     len = cmdp->argv[0]->len; len > 0; --len, ++p)
  60                         if (!isblank(*p))
  61                                 break;
  62         if (cmdp->argc == 0 || len == 0) {
  63                 ex_emsg(sp, cmdp->cmd->usage, EXM_USAGE);
  64                 return (1);
  65         }
  66
  67         (void)snprintf(buf, sizeof(buf),
  68             "set viScreenId %d\nset viStartLine %lu\nset viStopLine %lu",
  69             sp->id, cmdp->addr1.lno, cmdp->addr2.lno);
  70         if (Tcl_Eval(gp->tcl_interp, buf) == TCL_OK &&
  71             Tcl_Eval(gp->tcl_interp, cmdp->argv[0]->bp) == TCL_OK)
  72                 return (0);
  73
  74         msgq(sp, M_ERR, "Tcl: %s", ((Tcl_Interp *)gp->tcl_interp)->result);
  75         return (1);
  76 #else
  77         msgq(sp, M_ERR, "302|Vi was not loaded with a Tcl interpreter");
  78         return (1);
  79 #endif /* HAVE_TCL_INTERP */
  80 }