Move fourCC to a separate file

components/esm/defs.hpp

@@ -8,6 +8,7 @@
 
 #include <osg/Vec3f>
 
+#include "components/esm/fourcc.hpp"
 #include <components/esm4/common.hpp>
 
 namespace ESM

components/esm/format.hpp

@@ -1,7 +1,7 @@
 #ifndef COMPONENT_ESM_FORMAT_H
 #define COMPONENT_ESM_FORMAT_H
 
-#include "defs.hpp"
+#include "components/esm/fourcc.hpp"
 
 #include <cstdint>
 #include <iosfwd>

components/esm/fourcc.hpp

@@ -0,0 +1,13 @@
+#ifndef OPENMW_COMPONENTS_ESM_FOURCC_H
+#define OPENMW_COMPONENTS_ESM_FOURCC_H
+
+namespace ESM
+{
+    inline constexpr unsigned int fourCC(const char (&name)[5])
+    {
+        return static_cast<unsigned char>(name[0]) | (static_cast<unsigned char>(name[1]) << 8)
+            | (static_cast<unsigned char>(name[2]) << 16) | (static_cast<unsigned char>(name[3]) << 24);
+    }
+}
+
+#endif // OPENMW_COMPONENTS_ESM_FOURCC_H

components/esm4/common.hpp

@@ -30,18 +30,9 @@
 #include <cstdint>
 #include <string>
 
-#include "formid.hpp"
+#include "components/esm/fourcc.hpp"
 
-namespace ESM
+#include "formid.hpp"
-{
-    template <std::size_t len>
-    constexpr unsigned int fourCC(const char (&name)[len])
-    {
-        static_assert(len == 5, "Constant must be 4 characters long. (Plus null terminator)");
-        return static_cast<unsigned char>(name[0]) | (static_cast<unsigned char>(name[1]) << 8)
-            | (static_cast<unsigned char>(name[2]) << 16) | (static_cast<unsigned char>(name[3]) << 24);
-    }
-}
 
 namespace ESM4
 {