vi/v_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: v_delete.c,v 10.11 2001/06/25 15:19:31 skimo Exp $ (Berkeley) $Date: 2001/06/25 15:19:31 $";
  14 #endif /* not lint */
  15
  16 #include <sys/types.h>
  17 #include <sys/queue.h>
  18 #include <sys/time.h>
  19
  20 #include <bitstring.h>
  21 #include <limits.h>
  22 #include <stdio.h>
  23
  24 #include "../common/common.h"
  25 #include "vi.h"
  26
  27 /*
  28  * v_delete -- [buffer][count]d[count]motion
  29  *             [buffer][count]D
  30  *      Delete a range of text.
  31  *
  32  * PUBLIC: int v_delete __P((SCR *, VICMD *));
  33  */
  34 int
  35 v_delete(SCR *sp, VICMD *vp)
  36 {
  37         db_recno_t nlines;
  38         size_t len;
  39         int lmode;
  40
  41         lmode = F_ISSET(vp, VM_LMODE) ? CUT_LINEMODE : 0;
  42
  43         /* Yank the lines. */
  44         if (cut(sp, F_ISSET(vp, VC_BUFFER) ? &vp->buffer : NULL,
  45             &vp->m_start, &vp->m_stop,
  46             lmode | (F_ISSET(vp, VM_CUTREQ) ? CUT_NUMREQ : CUT_NUMOPT)))
  47                 return (1);
  48
  49         /* Delete the lines. */
  50         if (del(sp, &vp->m_start, &vp->m_stop, lmode))
  51                 return (1);
  52
  53         /*
  54          * Check for deletion of the entire file.  Try to check a close
  55          * by line so we don't go to the end of the file unnecessarily.
  56          */
  57         if (!db_exist(sp, vp->m_final.lno + 1)) {
  58                 if (db_last(sp, &nlines))
  59                         return (1);
  60                 if (nlines == 0) {
  61                         vp->m_final.lno = 1;
  62                         vp->m_final.cno = 0;
  63                         return (0);
  64                 }
  65         }
  66
  67         /*
  68          * One special correction, in case we've deleted the current line or
  69          * character.  We check it here instead of checking in every command
  70          * that can be a motion component.
  71          */
  72         if (db_get(sp, vp->m_final.lno, 0, NULL, &len)) {
  73                 if (db_get(sp, nlines, DBG_FATAL, NULL, &len))
  74                         return (1);
  75                 vp->m_final.lno = nlines;
  76         }
  77
  78         /*
  79          * !!!
  80          * Cursor movements, other than those caused by a line mode command
  81          * moving to another line, historically reset the relative position.
  82          *
  83          * This currently matches the check made in v_yank(), I'm hoping that
  84          * they should be consistent...
  85          */
  86         if (!F_ISSET(vp, VM_LMODE)) {
  87                 F_CLR(vp, VM_RCM_MASK);
  88                 F_SET(vp, VM_RCM_SET);
  89
  90                 /* Make sure the set cursor position exists. */
  91                 if (vp->m_final.cno >= len)
  92                         vp->m_final.cno = len ? len - 1 : 0;
  93         }
  94
  95         /*
  96          * !!!
  97          * The "dd" command moved to the first non-blank; "d<motion>"
  98          * didn't.
  99          */
 100         if (F_ISSET(vp, VM_LDOUBLE)) {
 101                 F_CLR(vp, VM_RCM_MASK);
 102                 F_SET(vp, VM_RCM_SETFNB);
 103         }
 104         return (0);
 105 }