72 lines
1.6 KiB
C
72 lines
1.6 KiB
C
/*
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* (C) Copyright 2000-2002
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* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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*/
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#include <common.h>
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/*
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* return a pointer to a string containing the size
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*"as xxx KiB", "xxx.y KiB", "xxx MiB", "xxx.y MiB",
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* xxx GiB, xxx.y GiB, etc as needed;
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*/
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char *size_human_readable(unsigned long long size)
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{
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static char buf[20];
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unsigned long m = 0, n;
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unsigned long long f;
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static const char names[] = {'E', 'P', 'T', 'G', 'M', 'K'};
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unsigned long d = 10 * ARRAY_SIZE(names);
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char c = 0;
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unsigned int i;
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char *ptr = buf;
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for (i = 0; i < ARRAY_SIZE(names); i++, d -= 10) {
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if (size >> d) {
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c = names[i];
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break;
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}
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}
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if (!c) {
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sprintf(buf, "%llu Bytes", size);
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return buf;
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}
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n = size >> d;
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f = size & ((1ULL << d) - 1);
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/* If there's a remainder, deal with it */
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if (f) {
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m = (10ULL * f + (1ULL << (d - 1))) >> d;
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if (m >= 10) {
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m -= 10;
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n += 1;
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}
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}
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ptr += sprintf(buf, "%lu", n);
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if (m) {
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ptr += sprintf(ptr, ".%lu", m);
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}
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sprintf(ptr, " %ciB", c);
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return buf;
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}
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EXPORT_SYMBOL(size_human_readable);
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