public JT808_0x0704 Deserialize(ReadOnlySpan <byte> bytes, int offset, IJT808FormatterResolver formatterResolver, out int readSize)
{
offset = 0;
JT808_0x0704 jT808_0X0704 = new JT808_0x0704();
jT808_0X0704.Count = JT808BinaryExtensions.ReadUInt16Little(bytes, ref offset);
jT808_0X0704.LocationType = (JT808_0x0704.BatchLocationType)JT808BinaryExtensions.ReadByteLittle(bytes, ref offset);
List <JT808_0x0200> jT808_0X0200s = new List <JT808_0x0200>();
int bufReadSize;
for (int i = 0; i < jT808_0X0704.Count; i++)
{
int buflen = JT808BinaryExtensions.ReadUInt16Little(bytes, ref offset);
//offset = offset + 2;
try
{
JT808_0x0200 jT808_0X0200 = formatterResolver.GetFormatter <JT808_0x0200>().Deserialize(bytes.Slice(offset, buflen), offset, formatterResolver, out bufReadSize);
jT808_0X0200s.Add(jT808_0X0200);
}
catch (Exception ex)
{
}
offset = offset + buflen;
}
jT808_0X0704.Positions = jT808_0X0200s;
readSize = offset;
return(jT808_0X0704);
}
public JT808Package Deserialize(ReadOnlySpan <byte> bytes, int offset, IJT808FormatterResolver formatterResolver, out int readSize)
{
JT808Package jT808Package = new JT808Package();
// 转义还原——>验证校验码——>解析消息
// 1. 解码（转义还原）
ReadOnlySpan <byte> buffer = JT808DeEscape(bytes, 0, bytes.Length);
// 2. 验证校验码
// 2.1. 获取校验位索引
int checkIndex = buffer.Length - 2;
// 2.2. 获取校验码
jT808Package.CheckCode = buffer[checkIndex];
// 2.3. 从消息头到校验码前一个字节
byte checkCode = buffer.ToXor(1, checkIndex);
// 2.4. 验证校验码
if (jT808Package.CheckCode != checkCode)
{
throw new JT808Exception($"{jT808Package.CheckCode}!={checkCode}");
}
jT808Package.Begin = buffer[offset];
offset = offset + 1;
// 3.初始化消息头
try
{
jT808Package.Header = formatterResolver.GetFormatter <JT808Header>().Deserialize(buffer, offset, formatterResolver, out readSize);
}
catch (Exception ex)
{
throw new JT808Exception($"消息头解析错误,offset:{offset.ToString()}", ex);
}
offset = readSize;
if (jT808Package.Header.MessageBodyProperty.DataLength != 0)
{
JT808BodiesTypeAttribute jT808BodiesTypeAttribute = jT808Package.Header.MsgId.GetAttribute <JT808BodiesTypeAttribute>();
if (jT808BodiesTypeAttribute != null)
{
if (jT808Package.Header.MessageBodyProperty.IsPackge)
{//4.分包消息体 从17位开始 或 未分包消息体 从13位开始
//消息总包数2位+包序号2位=4位
offset = offset + 2 + 2;
}
if (jT808Package.Header.MessageBodyProperty.DataLength != 0)
{
try
{
//5.处理消息体
jT808Package.Bodies = JT808FormatterResolverExtensions.JT808DynamicDeserialize(formatterResolver.GetFormatterDynamic(jT808BodiesTypeAttribute.JT808BodiesType), buffer.Slice(offset, jT808Package.Header.MessageBodyProperty.DataLength).ToArray(), offset, formatterResolver, out readSize);
}
catch (Exception ex)
{
throw new JT808Exception($"消息体解析错误,offset:{offset.ToString()}", ex);
}
}
}
}
jT808Package.End = buffer[bytes.Length - 1];
readSize = buffer.Length;
return(jT808Package);
}
public static byte[] Serialize(JT808Package jT808Package, IJT808FormatterResolver resolver)
{
if (resolver == null)
{
resolver = DefaultResolver;
}
var formatter = resolver.GetFormatter <JT808Package>();
// ref https://www.cnblogs.com/TianFang/p/9193881.html
var pool = ArrayPool <byte> .Shared;
byte[] buffer = pool.Rent(65536);
try
{
var len = formatter.Serialize(ref buffer, 0, jT808Package, DefaultResolver);
return(buffer.AsSpan().Slice(0, len).ToArray());
}
catch (JT808Exception ex)
{
throw new JT808Exception("Serialize", ex);
}
catch (Exception ex)
{
throw new Exception("Serialize", ex);
}
finally
{
pool.Return(buffer, true);
}
}
public JT808_0x0500 Deserialize(ReadOnlySpan <byte> bytes, int offset, IJT808FormatterResolver formatterResolver, out int readSize)
{
offset = 0;
JT808_0x0500 jT808_0X0500 = new JT808_0x0500();
jT808_0X0500.MsgNum = JT808BinaryExtensions.ReadUInt16Little(bytes, ref offset);
jT808_0X0500.JT808_0x0200 = formatterResolver.GetFormatter <JT808_0x0200>().Deserialize(bytes.Slice(offset), offset, formatterResolver, out readSize);
readSize = offset;
return(jT808_0X0500);
}
public JT808Header Deserialize(ReadOnlySpan <byte> bytes, int offset, IJT808FormatterResolver formatterResolver, out int readSize)
{
JT808Header jT808Header = new JT808Header();
// 1.消息ID
jT808Header.MsgId = (JT808MsgId)JT808BinaryExtensions.ReadUInt16Little(bytes, ref offset);
// 2.消息体属性
jT808Header.MessageBodyProperty = formatterResolver.GetFormatter <JT808HeaderMessageBodyProperty>().Deserialize(bytes, offset, formatterResolver, out readSize);
offset += readSize;
// 3.终端手机号 (写死大陆手机号码)
jT808Header.TerminalPhoneNo = JT808BinaryExtensions.ReadBCD(bytes, ref offset, 6).ToString().PadLeft(12, '0');
// 4.消息流水号
jT808Header.MsgNum = JT808BinaryExtensions.ReadUInt16Little(bytes, ref offset);
readSize = offset;
return(jT808Header);
}
public int Serialize(ref byte[] bytes, int offset, JT808Package value, IJT808FormatterResolver formatterResolver)
{
// 1. 先判断是否分包（理论下发不需分包，但为了统一还是加上分包处理）
// 2. 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;
if (value.Header.MessageBodyProperty.IsPackge)
{ //3. 先写入分包消息总包数、包序号
messageBodyOffset += JT808BinaryExtensions.WriteUInt16Little(ref bytes, messageBodyOffset, value.Header.MessageBodyProperty.PackgeCount);
messageBodyOffset += JT808BinaryExtensions.WriteUInt16Little(ref bytes, messageBodyOffset, value.Header.MessageBodyProperty.PackageIndex);
}
// 4. 数据体
//JT808.Protocol.Enums.JT808MsgId 映射对应消息特性
JT808BodiesTypeAttribute jT808BodiesTypeAttribute = value.Header.MsgId.GetAttribute <JT808BodiesTypeAttribute>();
if (jT808BodiesTypeAttribute != null)
{
if (value.Bodies != null)
{
// 4.1 处理数据体
messageBodyOffset = JT808FormatterResolverExtensions.JT808DynamicSerialize(formatterResolver.GetFormatterDynamic(jT808BodiesTypeAttribute.JT808BodiesType), ref bytes, offset, value.Bodies, formatterResolver);
}
}
byte[] messageBodyBytes = null;
if (messageBodyOffset != 0)
{
messageBodyBytes = bytes.AsSpan().Slice(0, messageBodyOffset).ToArray();
}
// ------------------------------------开始组包
// 1.起始符
offset += JT808BinaryExtensions.WriteLittle(ref bytes, offset, value.Begin);
// 2.赋值头数据长度
value.Header.MessageBodyProperty.DataLength = messageBodyOffset;
offset = formatterResolver.GetFormatter <JT808Header>().Serialize(ref bytes, offset, value.Header, formatterResolver);
if (messageBodyOffset != 0)
{
Buffer.BlockCopy(messageBodyBytes, 0, bytes, offset, messageBodyOffset);
offset += messageBodyOffset;
}
// 4.校验码
offset += JT808BinaryExtensions.WriteLittle(ref bytes, offset, bytes.ToXor(1, offset));
// 5.终止符
offset += JT808BinaryExtensions.WriteLittle(ref bytes, offset, value.End);
byte[] temp = JT808Escape(bytes.AsSpan().Slice(0, offset));
Buffer.BlockCopy(temp, 0, bytes, 0, temp.Length);
return(temp.Length);
}
public int Serialize(ref byte[] bytes, int offset, JT808Header value, IJT808FormatterResolver formatterResolver)
{
// 1.消息ID
offset += JT808BinaryExtensions.WriteUInt16Little(ref bytes, offset, (ushort)value.MsgId);
//2.消息体属性
offset = formatterResolver.GetFormatter <JT808HeaderMessageBodyProperty>().Serialize(ref bytes, offset, value.MessageBodyProperty, formatterResolver);
// 3.终端手机号 (写死大陆手机号码)
offset += JT808BinaryExtensions.WriteBCDLittle(ref bytes, offset, value.TerminalPhoneNo, 6, 12);
//消息流水号
offset += JT808BinaryExtensions.WriteUInt16Little(ref bytes, offset, value.MsgNum);
if (value.MessageBodyProperty.IsPackge)
{
//消息总包数2位+包序号2位=4位
offset += 4;
}
return(offset);
}
public static JT808Package Deserialize(ReadOnlySpan <byte> bytes, IJT808FormatterResolver resolver)
{
try
{
if (resolver == null)
{
resolver = DefaultResolver;
}
var formatter = resolver.GetFormatter <JT808Package>();
int readSize;
return(formatter.Deserialize(bytes, 0, resolver, out readSize));
}
catch (Exception ex)
{
throw new Exception("Deserialize", ex);
}
}
public int Serialize(ref byte[] bytes, int offset, JT808_0x0704 value, IJT808FormatterResolver formatterResolver)
{
offset += JT808BinaryExtensions.WriteUInt16Little(ref bytes, offset, value.Count);
offset += JT808BinaryExtensions.WriteLittle(ref bytes, offset, (byte)value.LocationType);
foreach (var item in value?.Positions)
{
try
{
// 需要反着来，先序列化数据体（由于位置汇报数据体长度为2个字节，所以先偏移2个字节），再根据数据体的长度设置回去
int positionOffset = formatterResolver.GetFormatter <JT808_0x0200>().Serialize(ref bytes, offset + 2, item, formatterResolver);
JT808BinaryExtensions.WriteUInt16Little(ref bytes, offset, (ushort)(positionOffset - offset - 2));
offset = positionOffset;
}
catch (Exception ex)
{
}
}
return(offset);
}
public int Serialize(ref byte[] bytes, int offset, JT808_0x0500 value, IJT808FormatterResolver formatterResolver)
{
offset += JT808BinaryExtensions.WriteUInt16Little(ref bytes, offset, value.MsgNum);
offset += formatterResolver.GetFormatter <JT808_0x0200>().Serialize(ref bytes, offset, value.JT808_0x0200, formatterResolver);
return(offset);
}
