[Commit-gnuradio] [gnuradio] 04/05: math: fix for index lookup of fast_atan2f; prevents a segfault when x=inf and y=inf.

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trondeau pushed a commit to branch maint
in repository gnuradio.

commit 5764b7959ab7052b0afd61d887f37fccf4cd6965
Author: Sylvain Munaut <address@hidden>
Date:   Tue Mar 18 11:31:27 2014 -0400

    math: fix for index lookup of fast_atan2f; prevents a segfault when x=inf 
and y=inf.
---
 gnuradio-runtime/lib/math/fast_atan2f.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/gnuradio-runtime/lib/math/fast_atan2f.cc 
b/gnuradio-runtime/lib/math/fast_atan2f.cc
index 2cafeec..20e21be 100644
--- a/gnuradio-runtime/lib/math/fast_atan2f.cc
+++ b/gnuradio-runtime/lib/math/fast_atan2f.cc
@@ -148,7 +148,7 @@ namespace gr {
     else {
       /* find index and interpolation value */
       alpha = z * (float)TAN_MAP_SIZE - .5;
-      index = (int)alpha;
+      index = (int)alpha & 0xff;
       alpha -= (float)index;
       /* determine base angle based on quadrant and */
       /* add or subtract table value from base angle based on quadrant */