[FFmpeg-cvslog] lavu/eval: handle div by zero in mod().

[Clément Bœsch]

ffmpeg | branch: master | Clément Bœsch <ubitux at gmail.com> | Wed Jan  2 22:50:56 2013 +0100| [49a78e6b8cbd83d070920b8250a4cf58a6b70d8e] | committer: Clément Bœsch

lavu/eval: handle div by zero in mod().

Similarly to 03f5043f5, we use the FTRAPV config setting.

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=49a78e6b8cbd83d070920b8250a4cf58a6b70d8e
---

 libavutil/eval.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libavutil/eval.c b/libavutil/eval.c
index b41c95c..6687b64 100644
--- a/libavutil/eval.c
+++ b/libavutil/eval.c
@@ -253,7 +253,7 @@ static double eval_expr(Parser *p, AVExpr *e)
             double d = eval_expr(p, e->param[0]);
             double d2 = eval_expr(p, e->param[1]);
             switch (e->type) {
-                case e_mod: return e->value * (d - floor(d/d2)*d2);
+                case e_mod: return e->value * (d - floor((!CONFIG_FTRAPV || d2) ? d / d2 : d * INFINITY) * d2);
                 case e_gcd: return e->value * av_gcd(d,d2);
                 case e_max: return e->value * (d >  d2 ?   d : d2);
                 case e_min: return e->value * (d <  d2 ?   d : d2);