| 1 | |
| 2 | #include "units.h"
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| 3 | #include <inttypes.h>
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| 4 | #include <limits.h>
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| 5 | #include <stdlib.h>
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| 6 | #include <string.h>
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| 7 | #include <linux/kernel.h>
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| 8 | #include <linux/time64.h>
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| 9 |
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| 10 | unsigned long parse_tag_value(const char *str, struct parse_tag *tags)
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| 11 | {
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| 12 | struct parse_tag *i = tags;
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| 13 |
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| 14 | while (i->tag) {
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| 15 | const char *s = strchr(str, i->tag);
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| 16 |
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| 17 | if (s) {
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| 18 | unsigned long int value;
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| 19 | char *endptr;
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| 20 |
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| 21 | value = strtoul(str, &endptr, 10);
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| 22 | if (s != endptr)
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| 23 | break;
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| 24 |
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| 25 | if (value > ULONG_MAX / i->mult)
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| 26 | break;
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| 27 | value *= i->mult;
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| 28 | return value;
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| 29 | }
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| 30 | i++;
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| 31 | }
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| 32 |
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| 33 | return (unsigned long) -1;
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| 34 | }
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| 35 |
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| 36 | double convert_unit_double(double value, char *unit)
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| 37 | {
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| 38 | *unit = ' ';
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| 39 |
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| 40 | if (value > 1000.0) {
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| 41 | value /= 1000.0;
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| 42 | *unit = 'K';
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| 43 | }
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| 44 |
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| 45 | if (value > 1000.0) {
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| 46 | value /= 1000.0;
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| 47 | *unit = 'M';
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| 48 | }
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| 49 |
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| 50 | if (value > 1000.0) {
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| 51 | value /= 1000.0;
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| 52 | *unit = 'G';
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| 53 | }
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| 54 |
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| 55 | return value;
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| 56 | }
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| 57 |
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| 58 | unsigned long convert_unit(unsigned long value, char *unit)
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| 59 | {
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| 60 | double v = convert_unit_double((double)value, unit);
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| 61 |
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| 62 | return (unsigned long)v;
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| 63 | }
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| 64 |
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| 65 | int unit_number__scnprintf(char *buf, size_t size, u64 n)
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| 66 | {
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| 67 | char unit[] = "BKMG";
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| 68 | int i = 0;
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| 69 |
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| 70 | while (((n / 1024) > 1) && (i < 3)) {
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| 71 | n /= 1024;
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| 72 | i++;
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| 73 | }
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| 74 |
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| 75 | return scnprintf(buf, size, "%" PRIu64 "%c", n, unit[i]);
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| 76 | }
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