77 lines
1.2 KiB
C
77 lines
1.2 KiB
C
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// SPDX-License-Identifier: GPL-2.0
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#include "units.h"
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#include <inttypes.h>
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#include <limits.h>
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#include <stdlib.h>
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#include <string.h>
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#include <linux/kernel.h>
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#include <linux/time64.h>
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unsigned long parse_tag_value(const char *str, struct parse_tag *tags)
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{
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struct parse_tag *i = tags;
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while (i->tag) {
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char *s = strchr(str, i->tag);
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if (s) {
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unsigned long int value;
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char *endptr;
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value = strtoul(str, &endptr, 10);
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if (s != endptr)
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break;
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if (value > ULONG_MAX / i->mult)
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break;
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value *= i->mult;
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return value;
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}
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i++;
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}
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return (unsigned long) -1;
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}
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double convert_unit_double(double value, char *unit)
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{
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*unit = ' ';
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if (value > 1000.0) {
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value /= 1000.0;
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*unit = 'K';
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}
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if (value > 1000.0) {
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value /= 1000.0;
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*unit = 'M';
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}
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if (value > 1000.0) {
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value /= 1000.0;
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*unit = 'G';
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}
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return value;
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}
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unsigned long convert_unit(unsigned long value, char *unit)
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{
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double v = convert_unit_double((double)value, unit);
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return (unsigned long)v;
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}
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int unit_number__scnprintf(char *buf, size_t size, u64 n)
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{
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char unit[4] = "BKMG";
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int i = 0;
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while (((n / 1024) > 1) && (i < 3)) {
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n /= 1024;
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i++;
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}
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return scnprintf(buf, size, "%" PRIu64 "%c", n, unit[i]);
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}
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