Method ReadMetaString

csharp/src/Fory/TypeResolver.cs:1597–1647

(
        ReadContext context,
        MetaStringDecoder decoder,
        IReadOnlyList<MetaStringEncoding> encodings)

    }

    private static MetaString ReadMetaString(
        ReadContext context,
        MetaStringDecoder decoder,
        IReadOnlyList<MetaStringEncoding> encodings)
    {
        uint header = context.Reader.ReadVarUInt32();
        int length = checked((int)(header >> 1));
        bool isRef = (header & 1) == 1;
        if (isRef)
        {
            int index = length - 1;
            MetaString? cached = context.GetReadMetaString(index);
            if (cached is null)
            {
                throw new InvalidDataException($"unknown meta string ref index {index}");
            }

            return cached.Value;
        }

        MetaString value;
        if (length == 0)
        {
            value = MetaString.Empty(decoder.SpecialChar1, decoder.SpecialChar2);
        }
        else
        {
            MetaStringEncoding encoding;
            if (length > 16)
            {
                long hash = context.Reader.ReadInt64();
                byte rawEncoding = unchecked((byte)(hash & 0xFF));
                encoding = (MetaStringEncoding)rawEncoding;
            }
            else
            {
                encoding = (MetaStringEncoding)context.Reader.ReadUInt8();
            }

            if (!encodings.Contains(encoding))
            {
                throw new InvalidDataException($"meta string encoding {encoding} not allowed in this context");
            }

            byte[] bytes = context.Reader.ReadBytes(length);
            value = decoder.Decode(bytes, encoding);
        }

        context.AppendReadMetaString(value);
        return value;
    }

    private static ulong MetaStringHash(MetaString metaString)
    {