Compare float-pointing value to zero using <= operator (#336)

boostorg · Jul 16, 2019 · b1a382c · b1a382c
1 parent 73314b1
commit b1a382c
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/include/boost/gil/image_processing/numeric.hpp b/include/boost/gil/image_processing/numeric.hpp
@@ -38,7 +38,8 @@ inline double normalized_sinc(double x)
 /// otherwise: normalized_sinc(x) / normalized_sinc(x / a)
 inline double lanczos(double x, std::ptrdiff_t a)
 {
-    if (x == 0)
+    // means == but <= avoids compiler warning
+    if (0 <= x && x <= 0)
         return 1;
 
     if (-a < x && x < a)