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

   1 /*      $NetBSD: v_xchar.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_xchar.c,v 10.10 2001/06/25 15:19:36 skimo Exp  (Berkeley) Date: 2001/06/25 15:19:36 ";
  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_xchar -- [buffer] [count]x
  30  *      Deletes the character(s) on which the cursor sits.
  31  *
  32  * PUBLIC: int v_xchar __P((SCR *, VICMD *));
  33  */
  34 int
  35 v_xchar(SCR *sp, VICMD *vp)
  36 {
  37         size_t len;
  38         int isempty;
  39
  40         if (db_eget(sp, vp->m_start.lno, NULL, &len, &isempty)) {
  41                 if (isempty)
  42                         goto nodel;
  43                 return (1);
  44         }
  45         if (len == 0) {
  46 nodel:          msgq(sp, M_BERR, "206|No characters to delete");
  47                 return (1);
  48         }
  49
  50         /*
  51          * Delete from the cursor toward the end of line, w/o moving the
  52          * cursor.
  53          *
  54          * !!!
  55          * Note, "2x" at EOL isn't the same as "xx" because the left movement
  56          * of the cursor as part of the 'x' command isn't taken into account.
  57          * Historically correct.
  58          */
  59         if (F_ISSET(vp, VC_C1SET))
  60                 vp->m_stop.cno += vp->count - 1;
  61         if (vp->m_stop.cno >= len - 1) {
  62                 vp->m_stop.cno = len - 1;
  63                 vp->m_final.cno = vp->m_start.cno ? vp->m_start.cno - 1 : 0;
  64         } else
  65                 vp->m_final.cno = vp->m_start.cno;
  66
  67         if (cut(sp,
  68             F_ISSET(vp, VC_BUFFER) ? &vp->buffer : NULL,
  69             &vp->m_start, &vp->m_stop, 0))
  70                 return (1);
  71         return (del(sp, &vp->m_start, &vp->m_stop, 0));
  72 }
  73
  74 /*
  75  * v_Xchar -- [buffer] [count]X
  76  *      Deletes the character(s) immediately before the current cursor
  77  *      position.
  78  *
  79  * PUBLIC: int v_Xchar __P((SCR *, VICMD *));
  80  */
  81 int
  82 v_Xchar(SCR *sp, VICMD *vp)
  83 {
  84         u_long cnt;
  85
  86         if (vp->m_start.cno == 0) {
  87                 v_sol(sp);
  88                 return (1);
  89         }
  90
  91         cnt = F_ISSET(vp, VC_C1SET) ? vp->count : 1;
  92         if (cnt >= vp->m_start.cno)
  93                 vp->m_start.cno = 0;
  94         else
  95                 vp->m_start.cno -= cnt;
  96         --vp->m_stop.cno;
  97         vp->m_final.cno = vp->m_start.cno;
  98
  99         if (cut(sp,
 100             F_ISSET(vp, VC_BUFFER) ? &vp->buffer : NULL,
 101             &vp->m_start, &vp->m_stop, 0))
 102                 return (1);
 103         return (del(sp, &vp->m_start, &vp->m_stop, 0));
 104 }