1 files changed, 6 insertions, 0 deletions
diff --git a/macros.h b/macros.h
index 55007c594..f5c78cc35 100644
--- a/macros.h
+++ b/macros.h
@@ -180,4 +180,10 @@ static inline uint16 ReadLE16Unaligned(const void* x)
  */
 #define ALIGN(x, n) (((x) + (n) - 1) & ~((n) - 1))
 
+/** return the largest value that can be entered in a variable.
+ *  known to work for uint32.
+ *  used by TGP to set the max value of the _patches.generation_seed in its definition
+ */
+#define MAX_UVALUE(type) ((type)~(type)0)
+
 #endif /* MACROS_H */