1 files changed, 22 insertions, 0 deletions
diff --git a/winsup/mingw/mingwex/complex/cproj.c b/winsup/mingw/mingwex/complex/cproj.c
new file mode 100644
index 000000000..cc7c48d0f
--- /dev/null
+++ b/winsup/mingw/mingwex/complex/cproj.c
@@ -0,0 +1,22 @@
+/*
+   cproj.c
+   Contributed by Danny Smith
+   2003-10-20
+*/
+
+#include <math.h>
+#include <complex.h>
+
+/* Return the value of the projection onto the Riemann sphere.*/
+
+double complex cproj (double complex Z)
+{
+  complex double Res = Z;
+  if (isinf (__real__ Z) || isinf (__imag__ Z))
+    {
+      __real__ Res = HUGE_VAL;
+      __imag__ Res = copysign (0.0, __imag__ Z);
+    }
+  return Res;
+}
+