public int Serialize(ref byte[] bytes, int offset, JT809_0x9300 value) { offset += JT809BinaryExtensions.WriteUInt16Little(bytes, offset, (ushort)value.SubBusinessType); //offset += JT809BinaryExtensions.WriteUInt32Little(memoryOwner, offset, value.DataLength); //JT809.Protocol.Enums.JT809BusinessType 映射对应消息特性 JT809BodiesTypeAttribute jT809SubBodiesTypeAttribute = value.SubBusinessType.GetAttribute <JT809BodiesTypeAttribute>(); if (jT809SubBodiesTypeAttribute == null) { throw new JT809Exception(JT809ErrorCode.GetAttributeError, $"JT809BodiesTypeAttribute Not Found>{value.SubBusinessType.ToString()}"); } try { // 先写入内容,然后在根据内容反写内容长度 offset = offset + 4; int contentOffset = JT809FormatterResolverExtensions.JT809DynamicSerialize(JT809FormatterExtensions.GetFormatter(jT809SubBodiesTypeAttribute.JT809BodiesType), ref bytes, offset, value.SubBodies); JT809BinaryExtensions.WriteUInt32Little(bytes, offset - 4, (uint)(contentOffset - offset)); offset = contentOffset; } catch { throw new JT809Exception(JT809ErrorCode.SubBodiesParseError, $"SubBusinessType>{value.SubBusinessType.ToString()}"); } return(offset); }
public int Serialize(ref byte[] bytes, int offset, JT809Package value) { // 1. 先序列化数据体,根据数据体的长度赋值给头部,在序列化头部。 int messageBodyOffset = 0; JT809BodiesTypeAttribute jT809BodiesTypeAttribute = value.Header.BusinessType.GetAttribute <JT809BodiesTypeAttribute>(); if (jT809BodiesTypeAttribute != null) { if (value.Bodies != null) { // 1.1 处理数据体 messageBodyOffset = JT809FormatterResolverExtensions.JT809DynamicSerialize(JT809FormatterExtensions.GetFormatter(jT809BodiesTypeAttribute.JT809BodiesType), ref bytes, messageBodyOffset, value.Bodies); } } byte[] messageBodyData = null; if (messageBodyOffset != 0) { messageBodyData = bytes.AsSpan(0, messageBodyOffset).ToArray(); // 1.2 数据加密 switch (value.Header.EncryptFlag) { case JT809Header_Encrypt.None: break; case JT809Header_Encrypt.Common: messageBodyData = JT809GlobalConfig.Instance.Encrypt.Encrypt(messageBodyData, value.Header.EncryptKey); break; } } // ------------------------------------开始组包 // 1.起始符 offset += JT809BinaryExtensions.WriteByteLittle(bytes, offset, value.BeginFlag); // 2.赋值头数据长度 if (messageBodyOffset != 0) { value.Header.MsgLength = (uint)(JT809Package.FixedByteLength + messageBodyData.Length); } else { value.Header.MsgLength = JT809Package.FixedByteLength; } // 2.1写入头部数据 offset = JT809FormatterExtensions.GetFormatter <JT809Header>().Serialize(ref bytes, offset, value.Header); if (messageBodyOffset != 0) { // 3. 写入数据体 Array.Copy(messageBodyData, 0, bytes, offset, messageBodyData.Length); offset += messageBodyData.Length; messageBodyData = null; } // 4.校验码 offset += JT809BinaryExtensions.WriteUInt16Little(bytes, offset, bytes.ToCRC16_CCITT(1, offset)); // 5.终止符 offset += JT809BinaryExtensions.WriteByteLittle(bytes, offset, value.EndFlag); // 6.转义 byte[] temp = JT809Escape(bytes.AsSpan(0, offset)); Array.Copy(temp, 0, bytes, 0, temp.Length); return(temp.Length); }