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

   1 /*      $NetBSD: v_yank.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_yank.c,v 10.10 2001/06/25 15:19:36 skimo Exp  (Berkeley) Date: 2001/06/25 15:19:36 ";
  17 #endif /* not lint */
  18 #else
  19 __RCSID("$NetBSD: v_yank.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_yank -- [buffer][count]y[count][motion]
  35  *           [buffer][count]Y
  36  *      Yank text (or lines of text) into a cut buffer.
  37  *
  38  * !!!
  39  * Historic vi moved the cursor to the from MARK if it was before the current
  40  * cursor and on a different line, e.g., "yk" moves the cursor but "yj" and
  41  * "yl" do not.  Unfortunately, it's too late to change this now.  Matching
  42  * the historic semantics isn't easy.  The line number was always changed and
  43  * column movement was usually relative.  However, "y'a" moved the cursor to
  44  * the first non-blank of the line marked by a, while "y`a" moved the cursor
  45  * to the line and column marked by a.  Hopefully, the motion component code
  46  * got it right...   Unlike delete, we make no adjustments here.
  47  *
  48  * PUBLIC: int v_yank __P((SCR *, VICMD *));
  49  */
  50 int
  51 v_yank(SCR *sp, VICMD *vp)
  52 {
  53         size_t len;
  54
  55         if (cut(sp,
  56             F_ISSET(vp, VC_BUFFER) ? &vp->buffer : NULL, &vp->m_start,
  57             &vp->m_stop, F_ISSET(vp, VM_LMODE) ? CUT_LINEMODE : 0))
  58                 return (1);
  59         sp->rptlines[L_YANKED] += (vp->m_stop.lno - vp->m_start.lno) + 1;
  60
  61         /*
  62          * One special correction, in case we've deleted the current line or
  63          * character.  We check it here instead of checking in every command
  64          * that can be a motion component.
  65          */
  66         if (db_get(sp, vp->m_final.lno, DBG_FATAL, NULL, &len))
  67                 return (1);
  68
  69         /*
  70          * !!!
  71          * Cursor movements, other than those caused by a line mode command
  72          * moving to another line, historically reset the relative position.
  73          *
  74          * This currently matches the check made in v_delete(), I'm hoping
  75          * that they should be consistent...
  76          */
  77         if (!F_ISSET(vp, VM_LMODE)) {
  78                 F_CLR(vp, VM_RCM_MASK);
  79                 F_SET(vp, VM_RCM_SET);
  80
  81                 /* Make sure the set cursor position exists. */
  82                 if (vp->m_final.cno >= len)
  83                         vp->m_final.cno = len ? len - 1 : 0;
  84         }
  85         return (0);
  86 }