--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/util.h	Sun Feb 01 21:28:57 2009 +0200
@@ -0,0 +1,42 @@
+
+#ifndef MISC_LUA_UTIL_H
+#define MISC_LUA_UTIL_H
+
+#include <lua.h>
+
+#ifndef enum_value_t
+#define enum_value_t int
+#endif
+
+// Array of string2eunm_t's must be ended with pair { NULL, fallback_value }
+typedef struct {
+	const char   *string;
+	enum_value_t  value;
+} string2enum_t;
+
+// If not found, fallback_value is returned
+enum_value_t  string2enum (const char *string, const string2enum_t *set);
+// If not found, NULL is returned
+const char   *enum2string (enum_value_t value, const string2enum_t *set);
+
+// returns result of string2enum on specified stack index, can handle plain numbers (no s2e called in this case)
+enum_value_t luaL_checkenum (lua_State *L, int index, const string2enum_t *set);
+// pushes onto a stack result of enum2string on a given value, if not recognized, pushes value as number
+void         luaL_pushenum (lua_State *L, enum_value_t value, const string2enum_t *set);
+
+// as luaL_checknum, but additionally handles tables as a multiple flags set.
+// table can contain both array and hash key-value pairs
+// hash entries are ORed with string2enum(key) if value resolves to lua true value
+// array entries are always ORed with string2enum(value)
+// eg { flag1, flag2, 16, flag3 = true, flag4 = { }, flag5 = nil } will set all flags except flag5 (and 16 too will be ORed)
+enum_value_t luaL_checkenum_multi (lua_State *L, int index, const string2enum_t *set);
+// pushes to stack table with all matched values from a set in a hash format
+// eg { flag1 = true, flag2 = true, flag6 = true, 16 } - that's it, if some bits will not match, they will be passed as a first array element.
+void         luaL_pushenum_multi (lua_State *L, enum_value_t value, const string2enum_t *set);
+
+void *luaL_malloc (lua_State *L, size_t size);
+void *luaL_realloc (lua_State *L, void *ptr, size_t osize, size_t nsize);
+void  luaL_free (lua_State *L, void *ptr);
+
+#endif
+