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/* SPDX-License-Identifier: LGPL-2.1-or-later */
#include "format-util.h"
#include "memory-util.h"
#include "stdio-util.h"
#include "strxcpyx.h"
assert_cc(STRLEN("%") + DECIMAL_STR_MAX(int) <= IF_NAMESIZE);
int format_ifname_full(int ifindex, FormatIfnameFlag flag, char buf[static IF_NAMESIZE]) {
if (ifindex <= 0)
return -EINVAL;
if (if_indextoname(ifindex, buf))
return 0;
if (!FLAGS_SET(flag, FORMAT_IFNAME_IFINDEX))
return -errno;
if (FLAGS_SET(flag, FORMAT_IFNAME_IFINDEX_WITH_PERCENT))
assert(snprintf_ok(buf, IF_NAMESIZE, "%%%d", ifindex));
else
assert(snprintf_ok(buf, IF_NAMESIZE, "%d", ifindex));
return 0;
}
int format_ifname_full_alloc(int ifindex, FormatIfnameFlag flag, char **ret) {
char buf[IF_NAMESIZE];
int r;
assert(ret);
r = format_ifname_full(ifindex, flag, buf);
if (r < 0)
return r;
return strdup_to(ret, buf);
}
char *format_bytes_full(char *buf, size_t l, uint64_t t, FormatBytesFlag flag) {
typedef struct {
const char *suffix;
uint64_t factor;
} suffix_table;
static const suffix_table table_iec[] = {
{ "E", UINT64_C(1024)*UINT64_C(1024)*UINT64_C(1024)*UINT64_C(1024)*UINT64_C(1024)*UINT64_C(1024) },
{ "P", UINT64_C(1024)*UINT64_C(1024)*UINT64_C(1024)*UINT64_C(1024)*UINT64_C(1024) },
{ "T", UINT64_C(1024)*UINT64_C(1024)*UINT64_C(1024)*UINT64_C(1024) },
{ "G", UINT64_C(1024)*UINT64_C(1024)*UINT64_C(1024) },
{ "M", UINT64_C(1024)*UINT64_C(1024) },
{ "K", UINT64_C(1024) },
}, table_si[] = {
{ "E", UINT64_C(1000)*UINT64_C(1000)*UINT64_C(1000)*UINT64_C(1000)*UINT64_C(1000)*UINT64_C(1000) },
{ "P", UINT64_C(1000)*UINT64_C(1000)*UINT64_C(1000)*UINT64_C(1000)*UINT64_C(1000) },
{ "T", UINT64_C(1000)*UINT64_C(1000)*UINT64_C(1000)*UINT64_C(1000) },
{ "G", UINT64_C(1000)*UINT64_C(1000)*UINT64_C(1000) },
{ "M", UINT64_C(1000)*UINT64_C(1000) },
{ "K", UINT64_C(1000) },
};
const suffix_table *table;
size_t n;
assert_cc(ELEMENTSOF(table_iec) == ELEMENTSOF(table_si));
if (t == UINT64_MAX)
return NULL;
table = flag & FORMAT_BYTES_USE_IEC ? table_iec : table_si;
n = ELEMENTSOF(table_iec);
for (size_t i = 0; i < n; i++)
if (t >= table[i].factor) {
uint64_t remainder = i != n - 1 ?
(t / table[i + 1].factor * 10 / table[n - 1].factor) % 10 :
(t * 10 / table[i].factor) % 10;
if (FLAGS_SET(flag, FORMAT_BYTES_BELOW_POINT) && remainder > 0)
(void) snprintf(buf, l,
"%" PRIu64 ".%" PRIu64 "%s",
t / table[i].factor,
remainder,
table[i].suffix);
else
(void) snprintf(buf, l,
"%" PRIu64 "%s",
t / table[i].factor,
table[i].suffix);
goto finish;
}
(void) snprintf(buf, l, "%" PRIu64 "%s", t, flag & FORMAT_BYTES_TRAILING_B ? "B" : "");
finish:
buf[l-1] = 0;
return buf;
}
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