busybox/libbb/human_readable.c

/* vi: set sw=4 ts=4: */
/*
 * Utility routines.
 *
 * Copyright (C) tons of folks.  Tracking down who wrote what
 * isn't something I'm going to worry about...  If you wrote something
 * here, please feel free to acknowledge your work.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 *
 * Based in part on code from sash, Copyright (c) 1999 by David I. Bell 
 * Permission has been granted to redistribute this code under the GPL.
 *
 */

#include <stdio.h>
#include "libbb.h"



const char *make_human_readable_str(unsigned long val, unsigned long hr)
{
	int i=0;
	static char str[10] = "\0";
	static const char strings[] = { 'k', 'M', 'G', 'T', 0 };
	unsigned long divisor = 1;

	if(val == 0)
		return("0");
	if(hr)
		snprintf(str, 9, "%ld", val/hr);
	else {
		while(val >= divisor && i <= 4) {
			divisor=divisor<<10, i++;
		} 
		divisor=divisor>>10, i--;
		snprintf(str, 9, "%.1Lf%c", (long double)(val)/divisor, strings[i]);
	}
	return(str);
}


/* END CODE */
/*
Local Variables:
c-file-style: "linux"
c-basic-offset: 4
tab-width: 4
End:
*/