NetBSD/usr.bin/vi/ex/ex_equal.c

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1998-01-09 11:03:16 +03:00
/* $NetBSD: ex_equal.c,v 1.7 1998/01/09 08:07:47 perry Exp $ */
/*-
* Copyright (c) 1992, 1993, 1994
* The Regents of the University of California. All rights reserved.
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* Copyright (c) 1992, 1993, 1994, 1995, 1996
* Keith Bostic. All rights reserved.
*
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* See the LICENSE file for redistribution information.
*/
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#include "config.h"
#ifndef lint
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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>
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#include "../common/common.h"
/*
* ex_equal -- :address =
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*
* PUBLIC: int ex_equal __P((SCR *, EXCMD *));
*/
int
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ex_equal(sp, cmdp)
SCR *sp;
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EXCMD *cmdp;
{
recno_t lno;
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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.
*/
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if (F_ISSET(cmdp, E_ADDR_DEF)) {
if (db_last(sp, &lno))
return (1);
} else
lno = cmdp->addr1.lno;
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(void)ex_printf(sp, "%ld\n", lno);
return (0);
}