cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
Log | Files | Refs | README | LICENSE | sfeed.txt

units.c (1241B)

      1// SPDX-License-Identifier: GPL-2.0
      2#include "units.h"
      3#include <inttypes.h>
      4#include <limits.h>
      5#include <stdlib.h>
      6#include <string.h>
      7#include <linux/kernel.h>
      8#include <linux/time64.h>
      9
     10unsigned long parse_tag_value(const char *str, struct parse_tag *tags)
     11{
     12	struct parse_tag *i = tags;
     13
     14	while (i->tag) {
     15		char *s = strchr(str, i->tag);
     16
     17		if (s) {
     18			unsigned long int value;
     19			char *endptr;
     20
     21			value = strtoul(str, &endptr, 10);
     22			if (s != endptr)
     23				break;
     24
     25			if (value > ULONG_MAX / i->mult)
     26				break;
     27			value *= i->mult;
     28			return value;
     29		}
     30		i++;
     31	}
     32
     33	return (unsigned long) -1;
     34}
     35
     36double convert_unit_double(double value, char *unit)
     37{
     38	*unit = ' ';
     39
     40	if (value > 1000.0) {
     41		value /= 1000.0;
     42		*unit = 'K';
     43	}
     44
     45	if (value > 1000.0) {
     46		value /= 1000.0;
     47		*unit = 'M';
     48	}
     49
     50	if (value > 1000.0) {
     51		value /= 1000.0;
     52		*unit = 'G';
     53	}
     54
     55	return value;
     56}
     57
     58unsigned long convert_unit(unsigned long value, char *unit)
     59{
     60	double v = convert_unit_double((double)value, unit);
     61
     62	return (unsigned long)v;
     63}
     64
     65int unit_number__scnprintf(char *buf, size_t size, u64 n)
     66{
     67	char unit[4] = "BKMG";
     68	int i = 0;
     69
     70	while (((n / 1024) > 1) && (i < 3)) {
     71		n /= 1024;
     72		i++;
     73	}
     74
     75	return scnprintf(buf, size, "%" PRIu64 "%c", n, unit[i]);
     76}