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-rw-r--r--qapi/string-output-visitor.c23
1 files changed, 12 insertions, 11 deletions
diff --git a/qapi/string-output-visitor.c b/qapi/string-output-visitor.c
index 67a8798292..fb1d2e806d 100644
--- a/qapi/string-output-visitor.c
+++ b/qapi/string-output-visitor.c
@@ -15,6 +15,7 @@
#include "qapi/visitor-impl.h"
#include "qapi/qmp/qerror.h"
#include "qemu/host-utils.h"
+#include <math.h>
struct StringOutputVisitor
{
@@ -47,30 +48,30 @@ static void print_type_size(Visitor *v, uint64_t *obj, const char *name,
Error **errp)
{
StringOutputVisitor *sov = DO_UPCAST(StringOutputVisitor, visitor, v);
- static const char suffixes[] = { 'B', 'K', 'M', 'G', 'T' };
+ static const char suffixes[] = { 'B', 'K', 'M', 'G', 'T', 'P', 'E' };
uint64_t div, val;
char *out;
int i;
if (!sov->human) {
- out = g_strdup_printf("%llu", (long long) *obj);
+ out = g_strdup_printf("%"PRIu64, *obj);
string_output_set(sov, out);
return;
}
val = *obj;
- /* Compute floor(log2(val)). */
- i = 64 - clz64(val);
-
- /* Find the power of 1024 that we'll display as the units. */
- i /= 10;
- if (i >= ARRAY_SIZE(suffixes)) {
- i = ARRAY_SIZE(suffixes) - 1;
- }
+ /* The exponent (returned in i) minus one gives us
+ * floor(log2(val * 1024 / 1000). The correction makes us
+ * switch to the higher power when the integer part is >= 1000.
+ */
+ frexp(val / (1000.0 / 1024.0), &i);
+ i = (i - 1) / 10;
+ assert(i < ARRAY_SIZE(suffixes));
div = 1ULL << (i * 10);
- out = g_strdup_printf("%0.03f%c", (double)val/div, suffixes[i]);
+ out = g_strdup_printf("%"PRIu64" (%0.3g %c%s)", val,
+ (double)val/div, suffixes[i], i ? "iB" : "");
string_output_set(sov, out);
}