1 files changed, 45 insertions, 0 deletions
diff --git a/lib/libc/gen/isfinite.c b/lib/libc/gen/isfinite.c
new file mode 100644
index 00000000000..0af06c60696
--- /dev/null
+++ b/lib/libc/gen/isfinite.c
@@ -0,0 +1,45 @@
+/*	$OpenBSD: isfinite.c,v 1.1 2008/07/24 09:31:07 martynas Exp $	*/
+/*
+ * Copyright (c) 2008 Martynas Venckus <martynas@openbsd.org>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include <sys/types.h>
+#include <machine/ieee.h>
+
+int
+__isfinite(double d)
+{
+	struct ieee_double *p = (struct ieee_double *)&d;
+
+	return (p->dbl_exp != DBL_EXP_INFNAN);
+}
+
+int
+__isfinitef(float f)
+{
+	struct ieee_single *p = (struct ieee_single *)&f;
+
+	return (p->sng_exp != SNG_EXP_INFNAN);
+}
+
+#if 0	/* XXX */
+int
+__isfinitel(long double e)
+{
+	struct ieee_ext *p = (struct ieee_ext *)&e;
+
+	return (p->ext_exp != EXT_EXP_INFNAN);
+}
+#endif	/* XXX */