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// SPDX-License-Identifier: GPL-2.0+
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <math.h>
#include <asm/types.h>
#include "utils.h"
/* See http://physics.nist.gov/cuu/Units/binary.html */
static const struct rate_suffix {
const char *name;
double scale;
} suffixes[] = {
{ "bit", 1. },
{ "Kibit", 1024. },
{ "kbit", 1000. },
{ "mibit", 1024.*1024. },
{ "mbit", 1000000. },
{ "gibit", 1024.*1024.*1024. },
{ "gbit", 1000000000. },
{ "tibit", 1024.*1024.*1024.*1024. },
{ "tbit", 1000000000000. },
{ "Bps", 8. },
{ "KiBps", 8.*1024. },
{ "KBps", 8000. },
{ "MiBps", 8.*1024*1024. },
{ "MBps", 8000000. },
{ "GiBps", 8.*1024.*1024.*1024. },
{ "GBps", 8000000000. },
{ "TiBps", 8.*1024.*1024.*1024.*1024. },
{ "TBps", 8000000000000. },
{ NULL }
};
int get_rate(unsigned int *rate, const char *str)
{
char *p;
double bps = strtod(str, &p);
const struct rate_suffix *s;
if (p == str)
return -1;
for (s = suffixes; s->name; ++s) {
if (strcasecmp(s->name, p) == 0) {
bps *= s->scale;
p += strlen(p);
break;
}
}
if (*p)
return -1; /* unknown suffix */
bps /= 8; /* -> bytes per second */
*rate = bps;
/* detect if an overflow happened */
if (*rate != floor(bps))
return -1;
return 0;
}
int get_rate64(__u64 *rate, const char *str)
{
char *p;
double bps = strtod(str, &p);
const struct rate_suffix *s;
if (p == str)
return -1;
for (s = suffixes; s->name; ++s) {
if (strcasecmp(s->name, p) == 0) {
bps *= s->scale;
p += strlen(p);
break;
}
}
if (*p)
return -1; /* unknown suffix */
bps /= 8; /* -> bytes per second */
*rate = bps;
return 0;
}
int get_size64(__u64 *size, const char *str)
{
double sz;
char *p;
sz = strtod(str, &p);
if (p == str)
return -1;
if (*p) {
if (strcasecmp(p, "kb") == 0 || strcasecmp(p, "k") == 0)
sz *= 1024;
else if (strcasecmp(p, "gb") == 0 || strcasecmp(p, "g") == 0)
sz *= 1024*1024*1024;
else if (strcasecmp(p, "gbit") == 0)
sz *= 1024*1024*1024/8;
else if (strcasecmp(p, "mb") == 0 || strcasecmp(p, "m") == 0)
sz *= 1024*1024;
else if (strcasecmp(p, "mbit") == 0)
sz *= 1024*1024/8;
else if (strcasecmp(p, "kbit") == 0)
sz *= 1024/8;
else if (strcasecmp(p, "b") != 0)
return -1;
}
*size = sz;
/* detect if an overflow happened */
if (*size != floor(sz))
return -1;
return 0;
}
int get_size(unsigned int *size, const char *str)
{
__u64 sz64;
int rv;
rv = get_size64(&sz64, str);
*size = sz64;
if (rv)
return rv;
if (sz64 > UINT_MAX)
return -1;
return 0;
}
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