external/bsd/nvi/dist/ex/ex_delete.c

   1 /*      $NetBSD: ex_delete.c,v 1.2 2013/11/22 15:52:05 christos Exp $   */
   2 /*-
   3  * Copyright (c) 1992, 1993, 1994
   4  *      The Regents of the University of California.  All rights reserved.
   5  * Copyright (c) 1992, 1993, 1994, 1995, 1996
   6  *      Keith Bostic.  All rights reserved.
   7  *
   8  * See the LICENSE file for redistribution information.
   9  */
  10
  11 #include "config.h"
  12
  13 #ifndef lint
  14 static const char sccsid[] = "Id: ex_delete.c,v 10.11 2001/06/25 15:19:15 skimo Exp  (Berkeley) Date: 2001/06/25 15:19:15 ";
  15 #endif /* not lint */
  16
  17 #include <sys/types.h>
  18 #include <sys/queue.h>
  19
  20 #include <bitstring.h>
  21 #include <limits.h>
  22 #include <stdio.h>
  23
  24 #include "../common/common.h"
  25
  26 /*
  27  * ex_delete: [line [,line]] d[elete] [buffer] [count] [flags]
  28  *
  29  *      Delete lines from the file.
  30  *
  31  * PUBLIC: int ex_delete __P((SCR *, EXCMD *));
  32  */
  33 int
  34 ex_delete(SCR *sp, EXCMD *cmdp)
  35 {
  36         db_recno_t lno;
  37
  38         NEEDFILE(sp, cmdp);
  39
  40         /*
  41          * !!!
  42          * Historically, lines deleted in ex were not placed in the numeric
  43          * buffers.  We follow historic practice so that we don't overwrite
  44          * vi buffers accidentally.
  45          */
  46         if (cut(sp,
  47             FL_ISSET(cmdp->iflags, E_C_BUFFER) ? &cmdp->buffer : NULL,
  48             &cmdp->addr1, &cmdp->addr2, CUT_LINEMODE))
  49                 return (1);
  50
  51         /* Delete the lines. */
  52         if (del(sp, &cmdp->addr1, &cmdp->addr2, 1))
  53                 return (1);
  54
  55         /* Set the cursor to the line after the last line deleted. */
  56         sp->lno = cmdp->addr1.lno;
  57
  58         /* Or the last line in the file if deleted to the end of the file. */
  59         if (db_last(sp, &lno))
  60                 return (1);
  61         if (sp->lno > lno)
  62                 sp->lno = lno;
  63         return (0);
  64 }