dist/nvi/ex/ex_delete.c

   1 /*      $NetBSD$ */
   2
   3 /*-
   4  * Copyright (c) 1992, 1993, 1994
   5  *      The Regents of the University of California.  All rights reserved.
   6  * Copyright (c) 1992, 1993, 1994, 1995, 1996
   7  *      Keith Bostic.  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[] = "Id: ex_delete.c,v 10.11 2001/06/25 15:19:15 skimo Exp (Berkeley) Date: 2001/06/25 15:19:15";
  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
  25 #include "../common/common.h"
  26
  27 /*
  28  * ex_delete: [line [,line]] d[elete] [buffer] [count] [flags]
  29  *
  30  *      Delete lines from the file.
  31  *
  32  * PUBLIC: int ex_delete __P((SCR *, EXCMD *));
  33  */
  34 int
  35 ex_delete(SCR *sp, EXCMD *cmdp)
  36 {
  37         db_recno_t lno;
  38
  39         NEEDFILE(sp, cmdp);
  40
  41         /*
  42          * !!!
  43          * Historically, lines deleted in ex were not placed in the numeric
  44          * buffers.  We follow historic practice so that we don't overwrite
  45          * vi buffers accidentally.
  46          */
  47         if (cut(sp,
  48             FL_ISSET(cmdp->iflags, E_C_BUFFER) ? &cmdp->buffer : NULL,
  49             &cmdp->addr1, &cmdp->addr2, CUT_LINEMODE))
  50                 return (1);
  51
  52         /* Delete the lines. */
  53         if (del(sp, &cmdp->addr1, &cmdp->addr2, 1))
  54                 return (1);
  55
  56         /* Set the cursor to the line after the last line deleted. */
  57         sp->lno = cmdp->addr1.lno;
  58
  59         /* Or the last line in the file if deleted to the end of the file. */
  60         if (db_last(sp, &lno))
  61                 return (1);
  62         if (sp->lno > lno)
  63                 sp->lno = lno;
  64         return (0);
  65 }