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 10.11 2001/06/25 15:19:15 skimo Exp $ (Berkeley) $Date: 2001/06/25 15:19:15 $";
  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(SCR *sp, EXCMD *cmdp)
  34 {
  35         db_recno_t lno;
  36
  37         NEEDFILE(sp, cmdp);
  38
  39         /*
  40          * !!!
  41          * Historically, lines deleted in ex were not placed in the numeric
  42          * buffers.  We follow historic practice so that we don't overwrite
  43          * vi buffers accidentally.
  44          */
  45         if (cut(sp,
  46             FL_ISSET(cmdp->iflags, E_C_BUFFER) ? &cmdp->buffer : NULL,
  47             &cmdp->addr1, &cmdp->addr2, CUT_LINEMODE))
  48                 return (1);
  49
  50         /* Delete the lines. */
  51         if (del(sp, &cmdp->addr1, &cmdp->addr2, 1))
  52                 return (1);
  53
  54         /* Set the cursor to the line after the last line deleted. */
  55         sp->lno = cmdp->addr1.lno;
  56
  57         /* Or the last line in the file if deleted to the end of the file. */
  58         if (db_last(sp, &lno))
  59                 return (1);
  60         if (sp->lno > lno)
  61                 sp->lno = lno;
  62         return (0);
  63 }