C# ProtoReader.ReadSingle方法代码示例

        /// <summary>
        /// This is the more "complete" version of Deserialize, which handles single instances of mapped types.
        /// The value is read as a complete field, including field-header and (for sub-objects) a
        /// length-prefix..kmc  
        /// 
        /// In addition to that, this provides support for:
        ///  - basic values; individual int / string / Guid / etc
        ///  - IList sets of any type handled by TryDeserializeAuxiliaryType
        /// </summary>
        private bool TryDeserializeAuxiliaryType(ProtoReader reader, DataFormat format, int tag, Type type, ref object value, bool skipOtherFields, bool asListItem)
        {
            if (type == null) throw new ArgumentNullException("type");
            Type itemType = null;
            TypeCode typecode = Type.GetTypeCode(type);
            int modelKey;
            WireType wiretype = GetWireType(typecode, format, ref type, out modelKey);

            bool found = false;
            if (wiretype == WireType.None)
            {
                itemType = GetListItemType(type);

                if (itemType != null)
                {
                    return TryDeserializeList(reader, format, tag, type, itemType, ref value);                    
                }
                // otherwise, not a happy bunny...
                ThrowUnexpectedType(type);
            }
            
            // to treat correctly, should read all values

            while (true)
            {
                // for convenience (re complex exit conditions), additional exit test here:
                // if we've got the value, are only looking for one, and we aren't a list - then exit
                if (found && asListItem) break;

                // read the next item
                int fieldNumber = reader.ReadFieldHeader();
                if (fieldNumber <= 0) break;
                if (fieldNumber != tag)
                {
                    if (skipOtherFields)
                    {
                        reader.SkipField();
                        continue;
                    }
                    throw ProtoReader.AddErrorData(new InvalidOperationException(
                        "Expected field " + tag + ", but found " + fieldNumber), reader);
                }
                found = true;
                reader.Hint(wiretype); // handle signed data etc

                if (modelKey >= 0)
                {
                    switch (wiretype)
                    {
                        case WireType.String:
                        case WireType.StartGroup:
                            SubItemToken token = ProtoReader.StartSubItem(reader);
                            value = Deserialize(modelKey, value, reader);
                            ProtoReader.EndSubItem(token, reader);
                            continue;
                        default:
                            value = Deserialize(modelKey, value, reader);
                            continue;
                    }
                }
                switch (typecode)
                {
                    case TypeCode.Int16: value = reader.ReadInt16(); continue;
                    case TypeCode.Int32: value = reader.ReadInt32(); continue;
                    case TypeCode.Int64: value = reader.ReadInt64(); continue;
                    case TypeCode.UInt16: value = reader.ReadUInt16(); continue;
                    case TypeCode.UInt32: value = reader.ReadUInt32(); continue;
                    case TypeCode.UInt64: value = reader.ReadUInt64(); continue;
                    case TypeCode.Boolean: value = reader.ReadBoolean(); continue;
                    case TypeCode.SByte: value = reader.ReadSByte(); continue;
                    case TypeCode.Byte: value = reader.ReadByte(); continue;
                    case TypeCode.Char: value = (char)reader.ReadUInt16(); continue;
                    case TypeCode.Double: value = reader.ReadDouble(); continue;
                    case TypeCode.Single: value = reader.ReadSingle(); continue;
                    case TypeCode.DateTime: value = BclHelpers.ReadDateTime(reader); continue;
                    case TypeCode.Decimal: BclHelpers.ReadDecimal(reader); continue;
                    case TypeCode.String: value = reader.ReadString(); continue;
                }
                if (type == typeof(byte[])) { value = ProtoReader.AppendBytes((byte[])value, reader); continue; }
                if (type == typeof(TimeSpan)) { value = BclHelpers.ReadTimeSpan(reader); continue; }
                if (type == typeof(Guid)) { value = BclHelpers.ReadGuid(reader); continue; }
                if (type == typeof(Uri)) { value = new Uri(reader.ReadString()); continue; }

            }
            if (!found && !asListItem) { value = Activator.CreateInstance(type); }
            return found;
        }

 public object Read(object value, ProtoReader source)
 {
     return source.ReadSingle();
 }

 public object Read(object value, ProtoReader source)
 {
     Helpers.DebugAssert(value == null); // since replaces
     return source.ReadSingle();
 }