DoubleConverter.cs

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namespace System.Text.Json.Serialization.Converters;
 
internal sealed class DoubleConverter : JsonConverter<double>
{
    public DoubleConverter()
    {
        IsInternalConverterForNumberType = true;
    }
 
    public override double Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
    {
        return reader.GetDouble();
    }
 
    public override void Write(Utf8JsonWriter writer, double value, JsonSerializerOptions options)
    {
        writer.WriteNumberValue(value);
    }
 
    internal override double ReadAsPropertyNameCore(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
    {
        return reader.GetDoubleWithQuotes();
    }
 
    internal override void WriteAsPropertyNameCore(Utf8JsonWriter writer, double value, JsonSerializerOptions options, bool isWritingExtensionDataProperty)
    {
        writer.WritePropertyName(value);
    }
 
    internal override double ReadNumberWithCustomHandling(ref Utf8JsonReader reader, JsonNumberHandling handling, JsonSerializerOptions options)
    {
        if (reader.TokenType == JsonTokenType.String)
        {
            if ((JsonNumberHandling.AllowReadingFromString & handling) != 0)
            {
                return reader.GetDoubleWithQuotes();
            }
            if ((JsonNumberHandling.AllowNamedFloatingPointLiterals & handling) != 0)
            {
                return reader.GetDoubleFloatingPointConstant();
            }
        }
        return reader.GetDouble();
    }
 
    internal override void WriteNumberWithCustomHandling(Utf8JsonWriter writer, double value, JsonNumberHandling handling)
    {
        if ((JsonNumberHandling.WriteAsString & handling) != 0)
        {
            writer.WriteNumberValueAsString(value);
        }
        else if ((JsonNumberHandling.AllowNamedFloatingPointLiterals & handling) != 0)
        {
            writer.WriteFloatingPointConstant(value);
        }
        else
        {
            writer.WriteNumberValue(value);
        }
    }
}