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util: introduce format_bytes_full()

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And move it into format-util.c.
This commit is contained in:
Yu Watanabe
2019-06-19 23:15:19 +09:00
parent 33a8695fdc
commit aa89266900
11 changed files with 77 additions and 49 deletions
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src/basic/format-util.c
+57
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@@ -1,5 +1,7 @@
/* SPDX-License-Identifier: LGPL-2.1+ */
#include <stdio.h>
#include "format-util.h"
#include "memory-util.h"
@@ -8,3 +10,58 @@ char *format_ifname(int ifindex, char buf[static IF_NAMESIZE + 1]) {
memzero(buf, IF_NAMESIZE + 1);
return if_indextoname(ifindex, 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_non_iec[] = {
{ "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 i;
assert_cc(ELEMENTSOF(table_iec) == ELEMENTSOF(table_non_iec));
if (t == (uint64_t) -1)
return NULL;
table = flag & FORMAT_BYTES_USE_IEC ? table_iec : table_non_iec;
for (i = 0; i < ELEMENTSOF(table_iec); i++)
if (t >= table[i].factor) {
if (flag & FORMAT_BYTES_BELOW_POINT)
snprintf(buf, l,
"%" PRIu64 ".%" PRIu64 "%s",
t / table[i].factor,
((t*UINT64_C(10)) / table[i].factor) % UINT64_C(10),
table[i].suffix);
else
snprintf(buf, l,
"%" PRIu64 "%s",
t / table[i].factor,
table[i].suffix);
goto finish;
}
snprintf(buf, l, "%" PRIu64 "%s", t, flag & FORMAT_BYTES_TRAILING_B ? "B" : "");
finish:
buf[l-1] = 0;
return buf;
}