Fix -Wtype-limits

utils/common/checks.h

@@ -0,0 +1,43 @@
+/* Copyright (C) 2020 MariaDB Corporation
+
+   This program is free software; you can redistribute it and/or
+   modify it under the terms of the GNU General Public License
+   as published by the Free Software Foundation; version 2 of
+   the License.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+   MA 02110-1301, USA. */
+#ifndef UTILS_COMMON_CHECKS_H
+#define UTILS_COMMON_CHECKS_H
+
+#include <type_traits>
+
+namespace utils {
+
+template <typename T>
+typename std::enable_if<std::is_unsigned<T>::value, bool>::type is_nonnegative(T)
+{ return true; };
+
+template <typename T>
+typename std::enable_if<std::is_signed<T>::value, bool>::type is_nonnegative(T v)
+{ return v >= 0; };
+
+
+template <typename T>
+typename std::enable_if<std::is_unsigned<T>::value, bool>::type is_negative(T)
+{ return false; };
+
+template <typename T>
+typename std::enable_if<std::is_signed<T>::value, bool>::type is_negative(T v)
+{ return v < 0; };
+
+} // namespace utils
+
+#endif // UTILS_COMMON_CHECKS_H