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

   1 /*      $NetBSD: v_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: v_delete.c,v 10.11 2001/06/25 15:19:31 skimo Exp  (Berkeley) Date: 2001/06/25 15:19:31 ";
  17 #endif /* not lint */
  18 #else
  19 __RCSID("$NetBSD: v_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 #include <sys/time.h>
  25
  26 #include <bitstring.h>
  27 #include <limits.h>
  28 #include <stdio.h>
  29
  30 #include "../common/common.h"
  31 #include "vi.h"
  32
  33 /*
  34  * v_delete -- [buffer][count]d[count]motion
  35  *             [buffer][count]D
  36  *      Delete a range of text.
  37  *
  38  * PUBLIC: int v_delete __P((SCR *, VICMD *));
  39  */
  40 int
  41 v_delete(SCR *sp, VICMD *vp)
  42 {
  43         db_recno_t nlines;
  44         size_t len;
  45         int lmode;
  46
  47         lmode = F_ISSET(vp, VM_LMODE) ? CUT_LINEMODE : 0;
  48
  49         /* Yank the lines. */
  50         if (cut(sp, F_ISSET(vp, VC_BUFFER) ? &vp->buffer : NULL,
  51             &vp->m_start, &vp->m_stop,
  52             lmode | (F_ISSET(vp, VM_CUTREQ) ? CUT_NUMREQ : CUT_NUMOPT)))
  53                 return (1);
  54
  55         /* Delete the lines. */
  56         if (del(sp, &vp->m_start, &vp->m_stop, lmode))
  57                 return (1);
  58
  59         /*
  60          * Check for deletion of the entire file.  Try to check a close
  61          * by line so we don't go to the end of the file unnecessarily.
  62          */
  63         if (!db_exist(sp, vp->m_final.lno + 1)) {
  64                 if (db_last(sp, &nlines))
  65                         return (1);
  66                 if (nlines == 0) {
  67                         vp->m_final.lno = 1;
  68                         vp->m_final.cno = 0;
  69                         return (0);
  70                 }
  71         }
  72
  73         /*
  74          * One special correction, in case we've deleted the current line or
  75          * character.  We check it here instead of checking in every command
  76          * that can be a motion component.
  77          */
  78         if (db_get(sp, vp->m_final.lno, 0, NULL, &len)) {
  79                 if (db_get(sp, nlines, DBG_FATAL, NULL, &len))
  80                         return (1);
  81                 vp->m_final.lno = nlines;
  82         }
  83
  84         /*
  85          * !!!
  86          * Cursor movements, other than those caused by a line mode command
  87          * moving to another line, historically reset the relative position.
  88          *
  89          * This currently matches the check made in v_yank(), I'm hoping that
  90          * they should be consistent...
  91          */
  92         if (!F_ISSET(vp, VM_LMODE)) {
  93                 F_CLR(vp, VM_RCM_MASK);
  94                 F_SET(vp, VM_RCM_SET);
  95
  96                 /* Make sure the set cursor position exists. */
  97                 if (vp->m_final.cno >= len)
  98                         vp->m_final.cno = len ? len - 1 : 0;
  99         }
 100
 101         /*
 102          * !!!
 103          * The "dd" command moved to the first non-blank; "d<motion>"
 104          * didn't.
 105          */
 106         if (F_ISSET(vp, VM_LDOUBLE)) {
 107                 F_CLR(vp, VM_RCM_MASK);
 108                 F_SET(vp, VM_RCM_SETFNB);
 109         }
 110         return (0);
 111 }