ex/ex_delete.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  *
   7  * See the LICENSE file for redistribution information.
   8  */
   9
  10 #include "config.h"
  11
  12 #ifndef lint
  13 static const char sccsid[] = "$Id: ex_delete.c,v 10.10 2000/04/21 19:00:36 skimo Exp $ (Berkeley) $Date: 2000/04/21 19:00:36 $";
  14 #endif /* not lint */
  15
  16 #include <sys/types.h>
  17 #include <sys/queue.h>
  18
  19 #include <bitstring.h>
  20 #include <limits.h>
  21 #include <stdio.h>
  22
  23 #include "../common/common.h"
  24
  25 /*
  26  * ex_delete: [line [,line]] d[elete] [buffer] [count] [flags]
  27  *
  28  *      Delete lines from the file.
  29  *
  30  * PUBLIC: int ex_delete __P((SCR *, EXCMD *));
  31  */
  32 int
  33 ex_delete(sp, cmdp)
  34         SCR *sp;
  35         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 }