Clean up file names, add namespace
diff --git a/src/hb-common.h b/src/hb-common.h
new file mode 100644
index 0000000..4ad3bd1
--- /dev/null
+++ b/src/hb-common.h
@@ -0,0 +1,14 @@
+#ifndef HB_COMMON_H
+#define HB_COMMON_H
+
+#include <stdint.h>
+
+# ifdef __cplusplus
+# define HB_BEGIN_DECLS() extern "C" { extern int hb_dummy_prototype (int)
+# define HB_END_DECLS() } extern "C" int hb_dummy_prototype (int)
+# else /* !__cplusplus */
+# define HB_BEGIN_DECLS() extern int hb_dummy_prototype (int)
+# define HB_END_DECLS() extern int hb_dummy_prototype (int)
+# endif /* !__cplusplus */
+
+#endif /* HB_COMMON_H */