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

   1 /*      $NetBSD: ex_delete.c,v 1.3 2014/01/26 21:43:45 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 #include <sys/cdefs.h>
  14 #if 0
  15 #ifndef lint
  16 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 ";
  17 #endif /* not lint */
  18 #else
  19 __RCSID("$NetBSD: ex_delete.c,v 1.3 2014/01/26 21:43:45 christos Exp $");
  20 #endif
  21
  22 #include <sys/types.h>
  23 #include <sys/queue.h>
  24
  25 #include <bitstring.h>
  26 #include <limits.h>
  27 #include <stdio.h>
  28
  29 #include "../common/common.h"
  30
  31 /*
  32  * ex_delete: [line [,line]] d[elete] [buffer] [count] [flags]
  33  *
  34  *      Delete lines from the file.
  35  *
  36  * PUBLIC: int ex_delete __P((SCR *, EXCMD *));
  37  */
  38 int
  39 ex_delete(SCR *sp, EXCMD *cmdp)
  40 {
  41         db_recno_t lno;
  42
  43         NEEDFILE(sp, cmdp);
  44
  45         /*
  46          * !!!
  47          * Historically, lines deleted in ex were not placed in the numeric
  48          * buffers.  We follow historic practice so that we don't overwrite
  49          * vi buffers accidentally.
  50          */
  51         if (cut(sp,
  52             FL_ISSET(cmdp->iflags, E_C_BUFFER) ? &cmdp->buffer : NULL,
  53             &cmdp->addr1, &cmdp->addr2, CUT_LINEMODE))
  54                 return (1);
  55
  56         /* Delete the lines. */
  57         if (del(sp, &cmdp->addr1, &cmdp->addr2, 1))
  58                 return (1);
  59
  60         /* Set the cursor to the line after the last line deleted. */
  61         sp->lno = cmdp->addr1.lno;
  62
  63         /* Or the last line in the file if deleted to the end of the file. */
  64         if (db_last(sp, &lno))
  65                 return (1);
  66         if (sp->lno > lno)
  67                 sp->lno = lno;
  68         return (0);
  69 }