From 22951aaaebb6c4c314c58ad576960a9c57695bbc Mon Sep 17 00:00:00 2001 From: Peter Xu Date: Fri, 12 May 2017 12:17:40 +0800 Subject: utils: provide size_to_str() Moving the algorithm from print_type_size() into size_to_str() so that other component can also leverage it. With that, refactor print_type_size(). The assert() in that logic is removed though, since even UINT64_MAX would not overflow. Signed-off-by: Peter Xu Message-Id: <1494562661-9063-3-git-send-email-peterx@redhat.com> Reviewed-by: Markus Armbruster Signed-off-by: Dr. David Alan Gilbert --- qapi/string-output-visitor.c | 22 ++++++---------------- 1 file changed, 6 insertions(+), 16 deletions(-) (limited to 'qapi/string-output-visitor.c') diff --git a/qapi/string-output-visitor.c b/qapi/string-output-visitor.c index 94ac8211d1..53c2175d81 100644 --- a/qapi/string-output-visitor.c +++ b/qapi/string-output-visitor.c @@ -211,10 +211,8 @@ static void print_type_size(Visitor *v, const char *name, uint64_t *obj, Error **errp) { StringOutputVisitor *sov = to_sov(v); - static const char suffixes[] = { 'B', 'K', 'M', 'G', 'T', 'P', 'E' }; - uint64_t div, val; - char *out; - int i; + uint64_t val; + char *out, *psize; if (!sov->human) { out = g_strdup_printf("%"PRIu64, *obj); @@ -223,19 +221,11 @@ static void print_type_size(Visitor *v, const char *name, uint64_t *obj, } val = *obj; - - /* 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("%"PRIu64" (%0.3g %c%s)", val, - (double)val/div, suffixes[i], i ? "iB" : ""); + psize = size_to_str(val); + out = g_strdup_printf("%"PRIu64" (%s)", val, psize); string_output_set(sov, out); + + g_free(psize); } static void print_type_bool(Visitor *v, const char *name, bool *obj, -- cgit v1.2.3-55-g7522