1 files changed, 65 insertions, 0 deletions
diff --git a/funtools/util/nan.c b/funtools/util/nan.c
new file mode 100644
index 0000000..4c1f856
--- /dev/null
+++ b/funtools/util/nan.c
@@ -0,0 +1,65 @@
+/*
+ *	Copyright (c) 1999-2003 Smithsonian Astrophysical Observatory
+ */
+
+#include <swap.h>
+#include <prsetup.h>
+
+/*
+ *
+ * getnanf() -- return a float NaN
+ *
+ */
+#ifdef ANSI_FUNC
+float getnanf(void)
+#else
+float getnanf()
+#endif
+{
+  unsigned char nan[4];
+  int i;
+
+  for(i=0; i<4; i++)
+    nan[i] = 1;
+
+  if( is_bigendian() ){
+    nan[0] = 0x7F;
+    nan[1] = 0x80;
+  }
+  else{
+    nan[3] = 0x7F;
+    nan[2] = 0x80;
+  }
+
+  return(*((float *)nan));
+}
+
+/*
+ *
+ * getnand() -- return a double NaN
+ *
+ */
+#ifdef ANSI_FUNC
+double getnand(void)
+#else
+double getnand()
+#endif
+{
+  unsigned char nan[8];
+  int i;
+  
+  for(i=0; i<8; i++)
+    nan[i] = 1;
+
+  if( is_bigendian() ){
+    nan[0] = 0x7F;
+    nan[1] = 0xF0;
+  }
+  else{
+    nan[7] = 0x7F;
+    nan[6] = 0xF0;
+  }
+
+  return(*((double *)nan));
+}
+