1 files changed, 6 insertions, 0 deletions
diff --git a/missing/finite.c b/missing/finite.c
new file mode 100644
index 0000000000..07fe3263e9
--- /dev/null
+++ b/missing/finite.c
@@ -0,0 +1,6 @@
+int
+finite(n)
+    double n;
+{
+    return !isnan(n) && !isinf(n);
+}