X-Git-Url: https://codewiz.org/gitweb?a=blobdiff_plain;f=cfg%2Fmacros.h;h=f0520eff74b24d5a145eabe29f994aa2d0496f88;hb=3d99acee09d6ea368be717347d0f887dae83b8d7;hp=b3be457fb9b8c185aa0d1932678fdc39db1403cc;hpb=3110ae0831fa4ba081c9206663390e21c7a4f78a;p=bertos.git

diff --git a/cfg/macros.h b/cfg/macros.h
index b3be457f..f0520eff 100644
--- a/cfg/macros.h
+++ b/cfg/macros.h
@@ -297,5 +297,20 @@
 #define ROTL(var, rot) (((var) << (rot)) | ((var) >> ((sizeof(var) * 8) - (rot))))
 /*\}*/
 
+/**
+ * Make an id from 4 letters, useful for
+ * file formats and kfile ids.
+ */
+#define MAKE_ID(a,b,c,d) \
+ 	( ((uint32_t)(a) << 24) \
+ 	| ((uint32_t)(b) << 16) \
+ 	| ((uint32_t)(c) <<  8) \
+ 	| ((uint32_t)(d) <<  0) )
+
+/**
+ * Type for id generated by MAKE_ID().
+ */
+typedef uint32_t id_t;
+
 #endif /* MACROS_H */