Modify print_size() so that it can accept numbers larger than 4GB on 32-bit
systems.
Add support for display terabyte, petabyte, and exabyte sizes. Change the
output to use International Electrotechnical Commission binary prefix standard.
Signed-off-by: Timur Tabi <ti...@freescale.com>
---
optimized the loop. If I had a log-base-10 function, I could eliminate it
completely, but it appears only ppc has __ilog2.
lib_generic/display_options.c | 29 +++++++++++++++++------------
1 files changed, 17 insertions(+), 12 deletions(-)
diff --git a/lib_generic/display_options.c b/lib_generic/display_options.c
index da17a62..86df05d 100644
--- a/lib_generic/display_options.c
+++ b/lib_generic/display_options.c
@@ -39,25 +39,30 @@ int display_options (void)
}
/*
- * print sizes as "xxx kB", "xxx.y kB", "xxx MB", "xxx.y MB",
- * xxx GB, or xxx.y GB as needed; allow for optional trailing string
+ * print sizes as "xxx KiB", "xxx.y KiB", "xxx MiB", "xxx.y MiB",
+ * xxx GiB, xxx.y GiB, etc as needed; allow for optional trailing string
* (like "\n")
*/
void print_size(unsigned long long size, const char *s)
{
unsigned long m = 0, n;
- unsigned long long d = 1 << 30; /* 1 GB */
- char c = 'G';
-
- if (size < d) { /* try MB */
- c = 'M';
- d = 1 << 20;
- if (size < d) { /* print in kB */
- c = 'k';
- d = 1 << 10;
+ static const char names[] = {'E', 'P', 'T', 'G', 'M', 'K'};
+ unsigned long long d = 1ULL << (10 * ARRAY_SIZE(names));
+ char c = 0;
+ unsigned int i;
+
+ for (i = 0; i < ARRAY_SIZE(names); i++, d >>= 10) {
+ if (size >= d) {
+ c = names[i];
+ break;
}
}
+ if (!c) {
+ printf("%llu Bytes%s", size, s);
+ return;
+ }
+
n = size / d;
/* If there's a remainder, deal with it */
@@ -70,11 +75,11 @@ void print_size(unsigned long long size, const char *s)
}
}
- printf ("%2ld", n);
+ printf ("%lu", n);
if (m) {
printf (".%ld", m);
}
- printf (" %cB%s", c, s);
+ printf (" %ciB%s", c, s);
}
/*
--
1.6.5
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