1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0
2*4882a593Smuzhiyun #include "units.h"
3*4882a593Smuzhiyun #include <inttypes.h>
4*4882a593Smuzhiyun #include <limits.h>
5*4882a593Smuzhiyun #include <stdlib.h>
6*4882a593Smuzhiyun #include <string.h>
7*4882a593Smuzhiyun #include <linux/kernel.h>
8*4882a593Smuzhiyun #include <linux/time64.h>
9*4882a593Smuzhiyun
parse_tag_value(const char * str,struct parse_tag * tags)10*4882a593Smuzhiyun unsigned long parse_tag_value(const char *str, struct parse_tag *tags)
11*4882a593Smuzhiyun {
12*4882a593Smuzhiyun struct parse_tag *i = tags;
13*4882a593Smuzhiyun
14*4882a593Smuzhiyun while (i->tag) {
15*4882a593Smuzhiyun char *s = strchr(str, i->tag);
16*4882a593Smuzhiyun
17*4882a593Smuzhiyun if (s) {
18*4882a593Smuzhiyun unsigned long int value;
19*4882a593Smuzhiyun char *endptr;
20*4882a593Smuzhiyun
21*4882a593Smuzhiyun value = strtoul(str, &endptr, 10);
22*4882a593Smuzhiyun if (s != endptr)
23*4882a593Smuzhiyun break;
24*4882a593Smuzhiyun
25*4882a593Smuzhiyun if (value > ULONG_MAX / i->mult)
26*4882a593Smuzhiyun break;
27*4882a593Smuzhiyun value *= i->mult;
28*4882a593Smuzhiyun return value;
29*4882a593Smuzhiyun }
30*4882a593Smuzhiyun i++;
31*4882a593Smuzhiyun }
32*4882a593Smuzhiyun
33*4882a593Smuzhiyun return (unsigned long) -1;
34*4882a593Smuzhiyun }
35*4882a593Smuzhiyun
convert_unit(unsigned long value,char * unit)36*4882a593Smuzhiyun unsigned long convert_unit(unsigned long value, char *unit)
37*4882a593Smuzhiyun {
38*4882a593Smuzhiyun *unit = ' ';
39*4882a593Smuzhiyun
40*4882a593Smuzhiyun if (value > 1000) {
41*4882a593Smuzhiyun value /= 1000;
42*4882a593Smuzhiyun *unit = 'K';
43*4882a593Smuzhiyun }
44*4882a593Smuzhiyun
45*4882a593Smuzhiyun if (value > 1000) {
46*4882a593Smuzhiyun value /= 1000;
47*4882a593Smuzhiyun *unit = 'M';
48*4882a593Smuzhiyun }
49*4882a593Smuzhiyun
50*4882a593Smuzhiyun if (value > 1000) {
51*4882a593Smuzhiyun value /= 1000;
52*4882a593Smuzhiyun *unit = 'G';
53*4882a593Smuzhiyun }
54*4882a593Smuzhiyun
55*4882a593Smuzhiyun return value;
56*4882a593Smuzhiyun }
57*4882a593Smuzhiyun
unit_number__scnprintf(char * buf,size_t size,u64 n)58*4882a593Smuzhiyun int unit_number__scnprintf(char *buf, size_t size, u64 n)
59*4882a593Smuzhiyun {
60*4882a593Smuzhiyun char unit[4] = "BKMG";
61*4882a593Smuzhiyun int i = 0;
62*4882a593Smuzhiyun
63*4882a593Smuzhiyun while (((n / 1024) > 1) && (i < 3)) {
64*4882a593Smuzhiyun n /= 1024;
65*4882a593Smuzhiyun i++;
66*4882a593Smuzhiyun }
67*4882a593Smuzhiyun
68*4882a593Smuzhiyun return scnprintf(buf, size, "%" PRIu64 "%c", n, unit[i]);
69*4882a593Smuzhiyun }
70