void ReadEngineLanguageTable <TDoc, TCursor>(IO.TagElementStream <TDoc, TCursor, string> s)
where TDoc : class
where TCursor : class
{
const string kElementNameEntry = "E";
const string kAttributeNameGameIndex = "id";
const string kAttributeNameLangIndex = "lang";
const string kAttributeNameOptional = "optional";
// number of languages for this build of the engine
int lang_count = 0;
foreach (var e in s.ElementsByName(kElementNameEntry))
{
using (s.EnterCursorBookmark(e))
{
int game_index = TypeExtensions.kNone;
int lang_index = TypeExtensions.kNone;
bool is_optional = false;
s.ReadAttribute(kAttributeNameGameIndex, ref game_index, NumeralBase.Decimal);
LanguageRegistry.SerializeLanguageId(s, kAttributeNameLangIndex, ref lang_index);
s.ReadAttributeOpt(kAttributeNameOptional, ref is_optional);
if (IsInvalidGameIndexFromStream(game_index) || lang_index.IsNone())
{
s.ThrowReadException(new System.IO.InvalidDataException("Invalid table entry data"));
}
mEngineLanguageTable[lang_index] = new GameLanguageHandle(mBuildHandle, lang_index, game_index);
if (is_optional)
{
mOptionalEngineLanguageFlags[lang_index] = true;
mOptionalGameLanguageFlags[game_index] = true;
}
lang_count++;
}
}
if (lang_count == 0)
{
s.ThrowReadException(new System.IO.InvalidDataException("Table has no entries"));
}
if (!InitializeGameLanguageTableFromEngineTable(lang_count))
{
s.ThrowReadException(new System.IO.InvalidDataException("Invalid game index data"));
}
}
void InitializeEngineLanguageTableWithBuildHandle()
{
mEngineLanguageTable = new GameLanguageHandle[LanguageRegistry.NumberOfLanguages];
for (int langIndex = 0; langIndex < mEngineLanguageTable.Length; langIndex++)
{
mEngineLanguageTable[langIndex] =
new GameLanguageHandle(mBuildHandle, langIndex, TypeExtensions.kNone);
}
Contract.Assert(LanguageRegistry.NumberOfLanguages <= Bits.kInt32BitCount,
nameof(mOptionalEngineLanguageFlags) + " and " + nameof(mOptionalGameLanguageFlags) +
" are too small to actually be a language bitvector");
}
static bool IsInvalidGameIndexFromStream(int index)
{
return(index < 0 || !GameLanguageHandle.IsValidGameIndex(index));
}