Add strtof() to libc, some ports seem to like it. Currently it's a simple

call to strtod() with bounding check.
Discussed with pyr@ and otto@

ok otto@ deraadt@

1 files changed, 39 insertions, 0 deletions

diff --git a/lib/libc/stdlib/strtof.c b/lib/libc/stdlib/strtof.c
new file mode 100644
index 00000000000..8c8db47ad82
--- /dev/null
+++ b/lib/libc/stdlib/strtof.c
@@ -0,0 +1,39 @@
+/*	$OpenBSD: strtof.c,v 1.1 2008/06/13 21:04:24 landry Exp $ */
+
+/*
+ * Copyright (c) 2008 Landry Breuil
+ * All rights reserved.
+ *
+ * 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 <errno.h>
+#include <limits.h>
+#include <stdlib.h>
+#include <math.h>
+
+float
+strtof(const char *s00, char **se)
+{
+	double	d;
+
+	d = strtod(s00, se);
+	if (d > FLT_MAX) {
+		errno = ERANGE;
+		return (FLT_MAX);
+	} else if (d < -FLT_MAX) {
+		errno = ERANGE;
+		return (-FLT_MAX);
+	}
+	return ((float) d);
+}