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      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 }
     87