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

   1 /*      $NetBSD: v_yank.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_yank.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_yank -- [buffer][count]y[count][motion]
  30  *           [buffer][count]Y
  31  *      Yank text (or lines of text) into a cut buffer.
  32  *
  33  * !!!
  34  * Historic vi moved the cursor to the from MARK if it was before the current
  35  * cursor and on a different line, e.g., "yk" moves the cursor but "yj" and
  36  * "yl" do not.  Unfortunately, it's too late to change this now.  Matching
  37  * the historic semantics isn't easy.  The line number was always changed and
  38  * column movement was usually relative.  However, "y'a" moved the cursor to
  39  * the first non-blank of the line marked by a, while "y`a" moved the cursor
  40  * to the line and column marked by a.  Hopefully, the motion component code
  41  * got it right...   Unlike delete, we make no adjustments here.
  42  *
  43  * PUBLIC: int v_yank __P((SCR *, VICMD *));
  44  */
  45 int
  46 v_yank(SCR *sp, VICMD *vp)
  47 {
  48         size_t len;
  49
  50         if (cut(sp,
  51             F_ISSET(vp, VC_BUFFER) ? &vp->buffer : NULL, &vp->m_start,
  52             &vp->m_stop, F_ISSET(vp, VM_LMODE) ? CUT_LINEMODE : 0))
  53                 return (1);
  54         sp->rptlines[L_YANKED] += (vp->m_stop.lno - vp->m_start.lno) + 1;
  55
  56         /*
  57          * One special correction, in case we've deleted the current line or
  58          * character.  We check it here instead of checking in every command
  59          * that can be a motion component.
  60          */
  61         if (db_get(sp, vp->m_final.lno, DBG_FATAL, NULL, &len))
  62                 return (1);
  63
  64         /*
  65          * !!!
  66          * Cursor movements, other than those caused by a line mode command
  67          * moving to another line, historically reset the relative position.
  68          *
  69          * This currently matches the check made in v_delete(), I'm hoping
  70          * that they should be consistent...
  71          */
  72         if (!F_ISSET(vp, VM_LMODE)) {
  73                 F_CLR(vp, VM_RCM_MASK);
  74                 F_SET(vp, VM_RCM_SET);
  75
  76                 /* Make sure the set cursor position exists. */
  77                 if (vp->m_final.cno >= len)
  78                         vp->m_final.cno = len ? len - 1 : 0;
  79         }
  80         return (0);
  81 }