--- a/CMakeLists.txt	Wed Jun 29 14:50:32 2016 +0200
+++ b/CMakeLists.txt	Wed Jun 29 19:02:56 2016 +0200
@@ -58,3 +58,5 @@
 add_subdirectory(modules/unicode)
 add_subdirectory(modules/xdg)
 # add_subdirectory(modules/zip)
+
+add_subdirectory(misc)

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/misc/CMakeLists.txt	Wed Jun 29 19:02:56 2016 +0200
@@ -0,0 +1,21 @@
+#
+# CMakeLists.txt -- code building for common code
+#
+# Copyright (c) 2013-2016 David Demelier <markand@malikania.fr>
+#
+# Permission to use, copy, modify, and/or 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.
+#
+
+add_executable(test-misc test-all.cpp)
+target_link_libraries(test-misc gtest)
+

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/misc/clamp.hpp	Wed Jun 29 19:02:56 2016 +0200
@@ -0,0 +1,33 @@
+/*
+ * clamp.hpp -- clamp a value
+ *
+ * Copyright (c) 2013-2016 David Demelier <markand@malikania.fr>
+ *
+ * Permission to use, copy, modify, and/or 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 <algorithm>
+
+/**
+ * Clamp the value between low and high.
+ *
+ * \param value the value
+ * \param low the minimum value
+ * \param high the maximum value
+ * \return the value between minimum and maximum
+ */
+template <typename T>
+constexpr T clamp(T value, T low, T high) noexcept
+{
+    return (value < high) ? std::max(value, low) : std::min(value, high);
+}
\ No newline at end of file

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/misc/test-all.cpp	Wed Jun 29 19:02:56 2016 +0200
@@ -0,0 +1,28 @@
+/*
+ * test-all.cpp -- test all functions
+ *
+ * Copyright (c) 2013-2016 David Demelier <markand@malikania.fr>
+ *
+ * Permission to use, copy, modify, and/or 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 <gtest/gtest.h>
+
+#include "test-clamp.cpp"
+
+int main(int argc, char **argv)
+{
+    testing::InitGoogleTest(&argc, argv);
+
+    return RUN_ALL_TESTS();
+}

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/misc/test-clamp.cpp	Wed Jun 29 19:02:56 2016 +0200
@@ -0,0 +1,44 @@
+/*
+ * test-clamp.cpp -- test clamp function
+ *
+ * Copyright (c) 2013-2016 David Demelier <markand@malikania.fr>
+ *
+ * Permission to use, copy, modify, and/or 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 "clamp.hpp"
+
+TEST(Clamp, normal)
+{
+    ASSERT_EQ(5, clamp(5, 0, 10));
+}
+
+TEST(Clamp, minimum)
+{
+    ASSERT_EQ(0, clamp(0, 0, 10));
+}
+
+TEST(Clamp, maximum)
+{
+    ASSERT_EQ(10, clamp(10, 0, 10));
+}
+
+TEST(Clamp, less)
+{
+    ASSERT_EQ(0, clamp(-10, 0, 10));
+}
+
+TEST(Clamp, higher)
+{
+    ASSERT_EQ(10, clamp(20, 0, 10));
+}