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/src/lib/libc/stdlib/strtof.c b/src/lib/libc/stdlib/strtof.c
new file mode 100644
index 0000000000..8c8db47ad8
--- /dev/null
+++ b/src/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);
+}