1 From 51ab6db4ed115d079d7131975e4adb074ba9ef9d Mon Sep 17 00:00:00 2001
2 From: Szabolcs Nagy <nsz@port70.net>
3 Date: Wed, 12 Oct 2016 00:49:59 +0200
4 Subject: fix float formatting of some exact halfway cases
6 in nearest rounding mode exact halfway cases were not following the
7 round to even rule if the rounding happened at a base 1000000000 digit
8 boundary of the internal representation and the previous digit was odd.
10 e.g. printf("%.0f", 1.5) printed 1 instead of 2.
12 src/stdio/vfprintf.c | 3 ++-
13 1 file changed, 2 insertions(+), 1 deletion(-)
15 diff --git a/src/stdio/vfprintf.c b/src/stdio/vfprintf.c
16 index e2ab2dc..60da14d 100644
17 --- a/src/stdio/vfprintf.c
18 +++ b/src/stdio/vfprintf.c
19 @@ -345,7 +345,8 @@ static int fmt_fp(FILE *f, long double y, int w, int p, int fl, int t)
21 long double round = 2/LDBL_EPSILON;
23 - if (*d/i & 1) round += 2;
24 + if ((*d/i & 1) || (i==1000000000 && d>a && (d[-1]&1)))
26 if (x<i/2) small=0x0.8p0;
27 else if (x==i/2 && d+1==z) small=0x1.0p0;