freebsd-src/contrib/nvi/ex/ex_equal.c
Peter Wemm b8ba871bd9 Import of nvi-1.79, minus a few bits that we dont need (eg: postscript
files, curses, db, regex etc that we already have).  The other glue will
follow shortly.

Obtained from: Keith Bostic <bostic@bostic.com>
1996-11-01 06:45:43 +00:00

60 lines
1.3 KiB
C

/*-
* Copyright (c) 1992, 1993, 1994
* The Regents of the University of California. All rights reserved.
* Copyright (c) 1992, 1993, 1994, 1995, 1996
* Keith Bostic. All rights reserved.
*
* See the LICENSE file for redistribution information.
*/
#include "config.h"
#ifndef lint
static const char sccsid[] = "@(#)ex_equal.c 10.10 (Berkeley) 3/6/96";
#endif /* not lint */
#include <sys/types.h>
#include <sys/queue.h>
#include <bitstring.h>
#include <limits.h>
#include <stdio.h>
#include "../common/common.h"
/*
* ex_equal -- :address =
*
* PUBLIC: int ex_equal __P((SCR *, EXCMD *));
*/
int
ex_equal(sp, cmdp)
SCR *sp;
EXCMD *cmdp;
{
recno_t lno;
NEEDFILE(sp, cmdp);
/*
* Print out the line number matching the specified address,
* or the number of the last line in the file if no address
* specified.
*
* !!!
* Historically, ":0=" displayed 0, and ":=" or ":1=" in an
* empty file displayed 1. Until somebody complains loudly,
* we're going to do it right. The tables in excmd.c permit
* lno to get away with any address from 0 to the end of the
* file, which, in an empty file, is 0.
*/
if (F_ISSET(cmdp, E_ADDR_DEF)) {
if (db_last(sp, &lno))
return (1);
} else
lno = cmdp->addr1.lno;
(void)ex_printf(sp, "%ld\n", lno);
return (0);
}