/*
* Take the given ActionScript value and push it onto the
* stack with the correct metatable.
*/
int push_as3_lua_userdata(lua_State * L, AS3_Val val)
{
LCALL(L, stack);
AS3LuaUserData * userdata = NULL;
AS3_Acquire(val);
userdata = (AS3LuaUserData *)lua_newuserdata(L, sizeof(AS3LuaUserData));
userdata->value = val;
luaL_getmetatable(L, AS3LUA_METATABLE);
lua_setmetatable(L, -2);
LRETURN(L, stack, 1);
}
/*
* Take the Lua stack item at index i and convert it into an
* ActionScript value.
*/
AS3_Val get_as3_value_from_lua_stack_type(lua_State * L, int i, int type)
{
/* WARNING: Panic alert! Use L*_FN checkers here! */
LCALL(L, stack);
AS3_Val value;
switch (type)
{
case LUA_TSTRING: /* strings */
{
size_t length = 0;
const char * str = lua_tolstring(L, i, &length);
if (str == NULL) /* NOTE: This is unreachable. Assert instead */
{
length = 6;
str = "(null)";
}
/* NOTE: Alchemy .5a truncates embedded zeroes in string
* regardless to the passed length
*/
value = AS3_StringN(str, length);
}
break;
case LUA_TBOOLEAN: /* booleans */
value = lua_toboolean(L, i) ? AS3_True() : AS3_False();
break;
case LUA_TNUMBER: /* numbers */
value = AS3_Number(lua_tonumber(L, i));
break;
case LUA_TNONE: /* fall through */
case LUA_TNIL: /* nil */
value = AS3_Null();
break;
case LUA_TUSERDATA: /* userdata */
{
void * userdata = lua_touserdata(L, i);
lua_getfield(L, LUA_REGISTRYINDEX, AS3LUA_METATABLE);
if (userdata == NULL || !lua_getmetatable(L, i))
{
lua_pop(L, 1); /* Pop AS3LUA_METATABLE */
value = as3_value_from_foreign_userdata(L, i);
}
else if (!lua_rawequal(L, -2, -1))
{
lua_pop(L, 2); /* Pop AS3LUA_METATABLE and userdata metatable */
value = as3_value_from_foreign_userdata(L, i);
}
else
{
lua_pop(L, 2); /* Pop AS3LUA_METATABLE and userdata metatable */
AS3LuaUserData * userdata = (AS3LuaUserData *)lua_touserdata(L, i);
value = userdata->value;
/*
* We just created one more reference to the AS3 value,
* as it still lives inside Lua.
* (And will probably be collected by GC.)
*/
AS3_Acquire(value);
}
}
break;
case LUA_TFUNCTION: /* function */
value = setup_callback(L, i);
break;
case LUA_TLIGHTUSERDATA: /* TODO: blackbox this type */
case LUA_TTABLE: /* TODO: deal with this type */
case LUA_TTHREAD: /* TODO: blackbox this type */
value = AS3_String(lua_typename(L, type));
break;
default: /* unreachable */
fatal_error("unknown Lua type");
break;
}
#ifdef DO_SPAM
SPAM(("get_as3_value_from_lua_stack(): end"));
AS3_Trace(
AS3_Call(
getQualifiedClassName_method, NULL, AS3_Array("AS3ValType", value)
)
);
#endif /* DO_SPAM */
LCHECK_FN(L, stack, 0, fatal_error);
return value;
}
void qspSetReturnValue(AS3_Val res)
{
result = res;
AS3_Acquire(result);
}
