Index: include/asterisk/strings.h
===================================================================
--- include/asterisk/strings.h	(revision 192353)
+++ include/asterisk/strings.h	(working copy)
@@ -899,4 +899,23 @@
 	return abs(hash);
 }
 
+/*!
+ * \brief Check if an input to the function is a number string or not
+ *
+ * This is a shamefull hack for this, and it really needs to be
+ * changed into something more suitable. Return value is set to 0 in
+ * case str includes non-numeric characters.
+ */
+static force_inline int ast_is_numeric(const char *str)
+{
+	if (strncmp(str,"-",1) || strncmp(str,"+",1))
+		str++;
+	while(*str) {
+		if(!isdigit(*str))
+			return 0;
+		str++;
+	}
+	return 1;
+}
+
 #endif /* _ASTERISK_STRINGS_H */