public static void BuildHashCodesTable(Type type, out int[] values, out ulong[] hashCodes)
{
var fields = type.GetFields(BindingFlags.Public | BindingFlags.Static);
var enumValues = fields.Select(field => ConvertToInt(Enum.Parse(type, field.Name), type.GetEnumUnderlyingType())).ToArray();
var uniqueValues = new HashSet <int>(enumValues).ToArray();
var nameHashes = GroBufHelpers.CalcHashesAndCheck(fields.Select(DataMember.Create));
var hashSet = new HashSet <uint>();
for (var x = (uint)enumValues.Length;; ++x)
{
hashSet.Clear();
var ok = true;
foreach (var value in uniqueValues)
{
var item = ((uint)value) % x;
if (hashSet.Contains(item))
{
ok = false;
break;
}
hashSet.Add(item);
}
if (!ok)
{
continue;
}
hashCodes = new ulong[x];
values = new int[x];
for (var i = 0; i < x; ++i)
{
values[i] = -1;
}
for (var i = 0; i < enumValues.Length; i++)
{
var value = enumValues[i];
var index = ((uint)value) % x;
hashCodes[index] = nameHashes[i];
values[index] = value;
}
break;
}
}
public static void BuildValuesTable(Type type, out int[] values, out ulong[] hashCodes)
{
var fields = type.GetFields(BindingFlags.Public | BindingFlags.Static);
var arr = fields.Select(field => ConvertToInt(Enum.Parse(type, field.Name), type.GetEnumUnderlyingType())).ToArray();
var hashes = GroBufHelpers.CalcHashesAndCheck(fields.Select(DataMember.Create));
var hashSet = new HashSet <uint>();
for (var x = (uint)hashes.Length;; ++x)
{
hashSet.Clear();
var ok = true;
foreach (var hash in hashes)
{
var item = (uint)(hash % x);
if (hashSet.Contains(item))
{
ok = false;
break;
}
hashSet.Add(item);
}
if (!ok)
{
continue;
}
hashCodes = new ulong[x];
values = new int[x];
for (var i = 0; i < hashes.Length; i++)
{
var hash = hashes[i];
var index = (int)(hash % x);
hashCodes[index] = hash;
values[index] = (int)arr.GetValue(i);
}
return;
}
}
