diff -r 4fd19a188509 -r 5770be2d5f3f util.c
--- a/util.c	Mon Feb 09 13:39:36 2009 +0200
+++ b/util.c	Sat Feb 14 16:40:09 2009 +0200
@@ -25,6 +25,9 @@
 	return NULL;
 }
 
+/// argument enum field
+/// String that will be converted to number or just plain number, that will be passed as is.
+/// Note, that if enum name is not recognized no error will be raised and default vale will be used.
 enum_value_t luaL_checkenum (lua_State *L, int index, const string2enum_t *set)
 {
 	if (lua_type (L, index) == LUA_TNUMBER)
@@ -33,6 +36,8 @@
 		return string2enum (luaL_checkstring (L, index), set);
 }
 
+/// return enum field
+/// String. If no string found, plain number will be returned.
 void luaL_pushenum (lua_State *L, enum_value_t value, const string2enum_t *set)
 {
 	const char *string = enum2string (value, set);
@@ -42,6 +47,12 @@
 		lua_pushinteger (L, value);
 }
 
+/// argument flags field
+/// Can be just plain number, then it is passed as is.
+/// Can be a string, then it is recognized as a single enabled flag.
+/// Or can be a table of the following format:
+/// * integer keys should have string values, that will be used as enabled flag names or numerical values, that will be just ORed;
+/// * string keys should be flag names, that will be enabled, if corresponding value contains true value.
 enum_value_t luaL_checkenum_multi (lua_State *L, int index, const string2enum_t *set)
 {
 	int type = lua_type (L, index);
@@ -74,6 +85,10 @@
 	return 0; // never happens
 }
 
+/// returned flags field
+/// Is always a table with present flag names as keys with true values.
+/// Not present flags are not present in table either.
+/// Not recognized values, if present, will be stored as a number in a first sequential table member (table[1]).
 void luaL_pushenum_multi (lua_State *L, enum_value_t value, const string2enum_t *set)
 {
 	enum_value_t matched = 0;