1 files changed, 46 insertions, 0 deletions
diff --git a/src/l52util.h b/src/l52util.h
new file mode 100644
index 0000000..6391307
--- /dev/null
+++ b/src/l52util.h
@@ -0,0 +1,46 @@
+#ifndef _LZUTILS_H_
+#define _LZUTILS_H_
+
+#include "lua.h"
+#include "lauxlib.h"
+
+#if LUA_VERSION_NUM >= 502 // lua 5.2
+
+// lua_rawgetp
+// lua_rawsetp
+// luaL_setfuncs
+// lua_absindex
+
+
+#define lua_objlen      lua_rawlen
+
+int   luaL_typerror (lua_State *L, int narg, const char *tname);
+
+void luaL_register (lua_State *L, const char *libname, const luaL_Reg *l);
+
+#else                      // lua 5.1
+
+// functions form lua 5.2
+
+# define lua_absindex(L, i) (((i)>0)?(i):((i)<=LUA_REGISTRYINDEX?(i):(lua_gettop(L)+(i)+1)))
+# define lua_rawlen  lua_objlen
+
+void  lua_rawgetp   (lua_State *L, int index, const void *p);
+void  lua_rawsetp   (lua_State *L, int index, const void *p);
+void  luaL_setfuncs  (lua_State *L, const luaL_Reg *l, int nup);
+
+#endif
+
+int   lutil_newmetatablep (lua_State *L, const void *p);
+void  lutil_getmetatablep (lua_State *L, const void *p);
+void  lutil_setmetatablep (lua_State *L, const void *p);
+
+#define lutil_newudatap(L, TTYPE, TNAME) (TTYPE *)lutil_newudatap_impl(L, sizeof(TTYPE), TNAME)
+int   lutil_isudatap      (lua_State *L, int ud, const void *p);
+void *lutil_checkudatap   (lua_State *L, int ud, const void *p);
+int   lutil_createmetap   (lua_State *L, const void *p, const luaL_Reg *methods);
+
+void *lutil_newudatap_impl     (lua_State *L, size_t size, const void *p);
+
+#endif
+