num2str: fix precision loss bug when the fractional part is close to 1

example:
	The result of num2str(11999999999999, 4, 1, 0, N2S_NONE) should
	be "12.0G", but current result is "11.0G".

Signed-off-by: Jiahao Li <gloit042@gmail.com>

diff --git a/lib/num2str.c b/lib/num2str.c
index 726f1c44159fd8a16379777411030b262eeb6cb1..423d97b2573986ac75fbf577358830b523fa2a83 100644 (file)
--- a/lib/num2str.c
+++ b/lib/num2str.c
@@ -112,6 +112,9 @@ done:
        sprintf(tmp, "%.*f", (int)(maxlen - strlen(tmp) - 1),
                (double)modulo / (double)thousand);
 
+       if (tmp[0] == '1')
+               num++;
+
        if (asprintf(&buf, "%llu.%s%s%s", (unsigned long long) num, &tmp[2],
                     unitprefix[post_index], unitstr[units]) < 0)
                buf = NULL;