BSD 4_4_Lite2 release

[unix-history] / usr / src / contrib / nvi.1.43 / vi / v_util.c

/*-
* Copyright (c) 1992, 1993, 1994
*      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_util.c    9.1 (Berkeley) 11/9/94";
#endif /* not lint */

#include <sys/types.h>
#include <sys/queue.h>
#include <sys/time.h>

#include <bitstring.h>
#include <ctype.h>
#include <limits.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <termios.h>
#include <unistd.h>

#include "compat.h"
#include <db.h>
#include <regex.h>

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

/*
* v_eof --
*      Vi end-of-file error.
*/
void
v_eof(sp, mp)
       SCR *sp;
       MARK *mp;
{
       recno_t lno;

       if (mp == NULL)
               msgq(sp, M_BERR, "190|Already at end-of-file");
       else {
               if (file_lline(sp, &lno))
                       return;
               if (mp->lno >= lno)
                       msgq(sp, M_BERR, "191|Already at end-of-file");
               else
                       msgq(sp, M_BERR, "192|Movement past the end-of-file");
       }
}

/*
* v_eol --
*      Vi end-of-line error.
*/
void
v_eol(sp, mp)
       SCR *sp;
       MARK *mp;
{
       size_t len;

       if (mp == NULL)
               msgq(sp, M_BERR, "193|Already at end-of-line");
       else {
               if (file_gline(sp, mp->lno, &len) == NULL) {
                       GETLINE_ERR(sp, mp->lno);
                       return;
               }
               if (mp->cno == len - 1)
                       msgq(sp, M_BERR, "194|Already at end-of-line");
               else
                       msgq(sp, M_BERR, "195|Movement past the end-of-line");
       }
}

/*
* v_nomove --
*      Vi no cursor movement error.
*/
void
v_nomove(sp)
       SCR *sp;
{
       msgq(sp, M_BERR, "196|No cursor movement made");
}

/*
* v_sof --
*      Vi start-of-file error.
*/
void
v_sof(sp, mp)
       SCR *sp;
       MARK *mp;
{
       if (mp == NULL || mp->lno == 1)
               msgq(sp, M_BERR, "197|Already at the beginning of the file");
       else
               msgq(sp, M_BERR, "198|Movement past the beginning of the file");
}

/*
* v_sol --
*      Vi start-of-line error.
*/
void
v_sol(sp)
       SCR *sp;
{
       msgq(sp, M_BERR, "199|Already in the first column");
}

/*
* v_isempty --
*      Return if the line contains nothing but white-space characters.
*/
int
v_isempty(p, len)
       char *p;
       size_t len;
{
       for (; len--; ++p)
               if (!isblank(*p))
                       return (0);
       return (1);
}