usr.bin/vi/nvi/v_mark.c

/*-
 * Copyright (c) 1992, 1993
 *      The Regents of the University of California.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *      This product includes software developed by the University of
 *      California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#ifndef lint
static char sccsid[] = "@(#)v_mark.c    8.3 (Berkeley) 10/31/93";
#endif /* not lint */

#include <sys/types.h>

#include "vi.h"
#include "vcmd.h"

/*
 * v_mark -- m[a-z]
 *      Set a mark.
 */
int
v_mark(sp, ep, vp, fm, tm, rp)
        SCR *sp;
        EXF *ep;
        VICMDARG *vp;
        MARK *fm, *tm, *rp;
{
        rp->lno = fm->lno;
        rp->cno = fm->cno;
        return (mark_set(sp, ep, vp->character, fm, 1));
}

/*
 * v_gomark -- '['`a-z], or `['`a-z]
 *      Move to a mark.
 *
 *      The single quote form moves to the first nonblank character of a line
 *      containing a mark.  The back quote form moves to a mark, setting both
 *      row and column.  We use a single routine for both forms, taking care
 *      of the nonblank behavior using a flag for the command.
 *
 *      Although not commonly known, the "'`" and "'`" forms are historically
 *      valid.  The behavior is determined by the first character, so "`'" is
 *      the same as "``".  Remember this fact -- you'll be amazed at how many
 *      people don't know it and will be delighted that you are able to tell
 *      them.
 */
int
v_gomark(sp, ep, vp, fm, tm, rp)
        SCR *sp;
        EXF *ep;
        VICMDARG *vp;
        MARK *fm, *tm, *rp;
{
        MARK *mp;

        if ((mp = mark_get(sp, ep, vp->character)) == NULL)
                return (1);
        *rp = *mp;
        return (0);
}