59 lines
2.6 KiB
C#
59 lines
2.6 KiB
C#
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using InnovEnergy.Lib.Protocols.DBus.Protocol.DataTypes;
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using InnovEnergy.Lib.Protocols.DBus.Protocol.DataTypes.Signatures;
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namespace InnovEnergy.Lib.Protocols.DBus.Protocol.Header;
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using H = ValueTuple<Byte, Byte, Byte, Byte, UInt32, UInt32, IReadOnlyList<(Byte code, Variant variant)>>;
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using Fields = IReadOnlyList<(Byte code, Variant variant)>;
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internal static class HeaderExtensions
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{
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public static Endian Endian (this H h) => (Endian) h.Item1;
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public static MessageType MessageType (this H h) => (MessageType) h.Item2;
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public static Byte Flags (this H h) => h.Item3;
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public static Byte ProtocolVersion(this H h) => h.Item4;
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public static UInt32 PayloadLength (this H h) => h.Item5;
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public static UInt32 Serial (this H h) => h.Item6;
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public static Fields Fields (this H h) => h.Item7;
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public static Signature? Signature (this H h) => h.GetField<Signature> (FieldCode.Signature) ;
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public static String? Interface (this H h) => h.GetField<String> (FieldCode.Interface) ;
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public static String? Member (this H h) => h.GetField<String> (FieldCode.Member) ;
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public static String? Destination (this H h) => h.GetField<String> (FieldCode.Destination) ;
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public static String? Sender (this H h) => h.GetField<String> (FieldCode.Sender) ;
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public static String? ErrorName (this H h) => h.GetField<String> (FieldCode.ErrorName) ;
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public static UInt32? ReplySerial (this H h) => h.GetField<UInt32> (FieldCode.ReplySerial);
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public static ObjectPath? ObjectPath (this H h) => h.GetField<ObjectPath>(FieldCode.Path);
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public static Boolean ReplyExpected (this H h) =>(h.Flags() & 1) == 0;
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public static Boolean AutoStart (this H h) =>(h.Flags() & 2) == 0;
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public static Boolean AllowInteractiveAuthorization(this H h) =>(h.Flags() & 4) != 0;
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private static T? GetField<T>(this H header, FieldCode fieldCode)
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{
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// not using a dictionary, list of header fields is always
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// small, so linear search is probably cheaper overall
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var fc = (Byte) fieldCode;
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return header
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.Fields()
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.Where(hf => hf.code == fc)
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.Select(hf => hf.variant.Value)
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.OfType<T>()
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.SingleOrDefault();
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}
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public static void AddField(this List<(Byte, Variant)> header,
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FieldCode fieldCode,
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Object? value)
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{
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if (value is null)
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return;
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header.Add(((Byte) fieldCode, value.Variant()));
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}
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}
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