external/bsd/nvi/dist/vi/v_delete.c

   1 /*      $NetBSD: v_delete.c,v 1.2 2013/11/22 15:52:06 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 #ifndef lint
  14 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 ";
  15 #endif /* not lint */
  16
  17 #include <sys/types.h>
  18 #include <sys/queue.h>
  19 #include <sys/time.h>
  20
  21 #include <bitstring.h>
  22 #include <limits.h>
  23 #include <stdio.h>
  24
  25 #include "../common/common.h"
  26 #include "vi.h"
  27
  28 /*
  29  * v_delete -- [buffer][count]d[count]motion
  30  *             [buffer][count]D
  31  *      Delete a range of text.
  32  *
  33  * PUBLIC: int v_delete __P((SCR *, VICMD *));
  34  */
  35 int
  36 v_delete(SCR *sp, VICMD *vp)
  37 {
  38         db_recno_t nlines;
  39         size_t len;
  40         int lmode;
  41
  42         lmode = F_ISSET(vp, VM_LMODE) ? CUT_LINEMODE : 0;
  43
  44         /* Yank the lines. */
  45         if (cut(sp, F_ISSET(vp, VC_BUFFER) ? &vp->buffer : NULL,
  46             &vp->m_start, &vp->m_stop,
  47             lmode | (F_ISSET(vp, VM_CUTREQ) ? CUT_NUMREQ : CUT_NUMOPT)))
  48                 return (1);
  49
  50         /* Delete the lines. */
  51         if (del(sp, &vp->m_start, &vp->m_stop, lmode))
  52                 return (1);
  53
  54         /*
  55          * Check for deletion of the entire file.  Try to check a close
  56          * by line so we don't go to the end of the file unnecessarily.
  57          */
  58         if (!db_exist(sp, vp->m_final.lno + 1)) {
  59                 if (db_last(sp, &nlines))
  60                         return (1);
  61                 if (nlines == 0) {
  62                         vp->m_final.lno = 1;
  63                         vp->m_final.cno = 0;
  64                         return (0);
  65                 }
  66         }
  67
  68         /*
  69          * One special correction, in case we've deleted the current line or
  70          * character.  We check it here instead of checking in every command
  71          * that can be a motion component.
  72          */
  73         if (db_get(sp, vp->m_final.lno, 0, NULL, &len)) {
  74                 if (db_get(sp, nlines, DBG_FATAL, NULL, &len))
  75                         return (1);
  76                 vp->m_final.lno = nlines;
  77         }
  78
  79         /*
  80          * !!!
  81          * Cursor movements, other than those caused by a line mode command
  82          * moving to another line, historically reset the relative position.
  83          *
  84          * This currently matches the check made in v_yank(), I'm hoping that
  85          * they should be consistent...
  86          */
  87         if (!F_ISSET(vp, VM_LMODE)) {
  88                 F_CLR(vp, VM_RCM_MASK);
  89                 F_SET(vp, VM_RCM_SET);
  90
  91                 /* Make sure the set cursor position exists. */
  92                 if (vp->m_final.cno >= len)
  93                         vp->m_final.cno = len ? len - 1 : 0;
  94         }
  95
  96         /*
  97          * !!!
  98          * The "dd" command moved to the first non-blank; "d<motion>"
  99          * didn't.
 100          */
 101         if (F_ISSET(vp, VM_LDOUBLE)) {
 102                 F_CLR(vp, VM_RCM_MASK);
 103                 F_SET(vp, VM_RCM_SETFNB);
 104         }
 105         return (0);
 106 }