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v_xchar.c revision 1.3 
      1 /*	$NetBSD: v_xchar.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_xchar.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_xchar.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_xchar -- [buffer] [count]x
     35  *	Deletes the character(s) on which the cursor sits.
     36  *
     37  * PUBLIC: int v_xchar __P((SCR *, VICMD *));
     38  */
     39 int
     40 v_xchar(SCR *sp, VICMD *vp)
     41 {
     42 	size_t len;
     43 	int isempty;
     44 
     45 	if (db_eget(sp, vp->m_start.lno, NULL, &len, &isempty)) {
     46 		if (isempty)
     47 			goto nodel;
     48 		return (1);
     49 	}
     50 	if (len == 0) {
     51 nodel:		msgq(sp, M_BERR, "206|No characters to delete");
     52 		return (1);
     53 	}
     54 
     55 	/*
     56 	 * Delete from the cursor toward the end of line, w/o moving the
     57 	 * cursor.
     58 	 *
     59 	 * !!!
     60 	 * Note, "2x" at EOL isn't the same as "xx" because the left movement
     61 	 * of the cursor as part of the 'x' command isn't taken into account.
     62 	 * Historically correct.
     63 	 */
     64 	if (F_ISSET(vp, VC_C1SET))
     65 		vp->m_stop.cno += vp->count - 1;
     66 	if (vp->m_stop.cno >= len - 1) {
     67 		vp->m_stop.cno = len - 1;
     68 		vp->m_final.cno = vp->m_start.cno ? vp->m_start.cno - 1 : 0;
     69 	} else
     70 		vp->m_final.cno = vp->m_start.cno;
     71 
     72 	if (cut(sp,
     73 	    F_ISSET(vp, VC_BUFFER) ? &vp->buffer : NULL,
     74 	    &vp->m_start, &vp->m_stop, 0))
     75 		return (1);
     76 	return (del(sp, &vp->m_start, &vp->m_stop, 0));
     77 }
     78 
     79 /*
     80  * v_Xchar -- [buffer] [count]X
     81  *	Deletes the character(s) immediately before the current cursor
     82  *	position.
     83  *
     84  * PUBLIC: int v_Xchar __P((SCR *, VICMD *));
     85  */
     86 int
     87 v_Xchar(SCR *sp, VICMD *vp)
     88 {
     89 	u_long cnt;
     90 
     91 	if (vp->m_start.cno == 0) {
     92 		v_sol(sp);
     93 		return (1);
     94 	}
     95 
     96 	cnt = F_ISSET(vp, VC_C1SET) ? vp->count : 1;
     97 	if (cnt >= vp->m_start.cno)
     98 		vp->m_start.cno = 0;
     99 	else
    100 		vp->m_start.cno -= cnt;
    101 	--vp->m_stop.cno;
    102 	vp->m_final.cno = vp->m_start.cno;
    103 
    104 	if (cut(sp,
    105 	    F_ISSET(vp, VC_BUFFER) ? &vp->buffer : NULL,
    106 	    &vp->m_start, &vp->m_stop, 0))
    107 		return (1);
    108 	return (del(sp, &vp->m_start, &vp->m_stop, 0));
    109 }
    110