path: root/src
diff options
authorRich Felker <>2014-04-07 02:05:20 -0400
committerRich Felker <>2014-04-07 02:05:20 -0400
commit89740868c9f1c84b8ee528468d12df1fa72cd392 (patch)
treefb8252ea812c9700d650bf8bacc842efecec4f5d /src
parent109048e031f39fbb370211fde44ababf6c04c8fb (diff)
fix failure of printf %g to strip trailing zeros in some cases
the code to strip trailing zeros was only looking in the last slot for up to 9 zeros, assuming that the rounding code had already removed fully-zero slots from the end. however, this ignored cases where the rounding code did not run at all, which occur when the value being printed is exactly representable in the requested precision. the simplest solution is to move the code that strips trailing zero slots to run unconditionally, immediately after rounding, rather than as the last step of rounding.
Diffstat (limited to 'src')
1 files changed, 1 insertions, 1 deletions
diff --git a/src/stdio/vfprintf.c b/src/stdio/vfprintf.c
index bec63ecf..0be75498 100644
--- a/src/stdio/vfprintf.c
+++ b/src/stdio/vfprintf.c
@@ -363,8 +363,8 @@ static int fmt_fp(FILE *f, long double y, int w, int p, int fl, int t)
if (z>d+1) z=d+1;
- for (; !z[-1] && z>a; z--);
+ for (; z>a && !z[-1]; z--);
if ((t|32)=='g') {
if (!p) p++;