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Improve the statistics reporting for xfs_io.
Merge of master-melb:xfs-cmds:21779a by kenmcd.

/*
 * Copyright (c) 2000-2004 Silicon Graphics, Inc.  All Rights Reserved.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of version 2 of the GNU General Public License as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it would be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 *
 * Further, this software is distributed without any warranty that it is
 * free of the rightful claim of any third person regarding infringement
 * or the like.  Any license provided herein, whether implied or
 * otherwise, applies only to this software file.  Patent licenses, if
 * any, provided herein do not apply to combinations of this program with
 * other software, or any other product whatsoever.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, write the Free Software Foundation, Inc., 59
 * Temple Place - Suite 330, Boston MA 02111-1307, USA.
 *
 * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
 * Mountain View, CA  94043, or:
 *
 * http://www.sgi.com
 *
 * For further information regarding this notice, see:
 *
 * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
 */

extern char	**breakline(char *input, int *count);
extern void	doneline(char *input, char **vec);
extern char	*fetchline(void);
extern void	init_cvtnum(int *blocksize, int *sectorsize);
extern long long cvtnum(int blocksize, int sectorsize, char *s);
extern void	cvtstr(double value, char *str, size_t sz);
extern struct timeval tsub(struct timeval t1, struct timeval t2);
extern double	tdiv(double value, struct timeval tv);

enum {
	DEFAULT_TIME		= 0x0,
	TERSE_FIXED_TIME	= 0x1,
	VERBOSE_FIXED_TIME	= 0x2,
};

extern void	timestr(struct timeval *tv, char *str, size_t sz, int flags);