1 files changed, 4 insertions, 0 deletions

diff --git a/lptypes.h b/lptypes.h
index 7793e76..17d406e 100644
--- a/lptypes.h
+++ b/lptypes.h
@@ -10,6 +10,7 @@
 
 #include <assert.h>
 #include <limits.h>
+#include <string.h>
 
 #include "lua.h"
 
@@ -97,6 +98,9 @@ typedef struct Charset {
 
 #define loopset(v,b)    { int v; for (v = 0; v < CHARSETSIZE; v++) {b;} }
 
+#define fillset(s,c)    memset(s,c,CHARSETSIZE)
+#define clearset(s)     fillset(s,0)
+
 /* access to charset */
 #define treebuffer(t)      ((byte *)((t) + 1))