public static S7ReadJobAckDatagram TranslateFromMemory(Memory <byte> data)
{
var span = data.Span;
var result = new S7ReadJobAckDatagram
{
Header = S7AckDataDatagram.TranslateFromMemory(data),
};
var offset = result.Header.GetParameterOffset();
result.Function = span[offset++];
result.ItemCount = span[offset++];
for (var i = 0; i < result.ItemCount; i++)
{
var res = S7DataItemSpecification.TranslateFromMemory(data.Slice(offset));
result.Data.Add(res);
offset += res.GetSpecificationLength();
if (offset % 2 != 0)
{
offset++;
}
}
return(result);
}
public static Memory <byte> TranslateToMemory(S7ReadJobAckDatagram datagram)
{
var result = S7AckDataDatagram.TranslateToMemory(datagram.Header);
var span = result.Span;
var offset = datagram.Header.Header.GetHeaderSize();
span[offset++] = datagram.Function;
span[offset++] = datagram.ItemCount;
foreach (var item in datagram.Data)
{
S7DataItemSpecification.TranslateToMemory(item, result.Slice(offset));
offset += item.GetSpecificationLength();
}
return(result);
}
public static S7ReadJobAckDatagram Build(SiemensPlcProtocolContext context, int id, IEnumerable <ReadResultItem> vars)
{
var result = new S7ReadJobAckDatagram();
ushort dataLength = 0;
result.Header.Header.ProtocolDataUnitReference = (ushort)id;
if (vars != null)
{
result.ItemCount = (byte)vars.Count();
var numberOfItems = result.ItemCount;
foreach (var item in vars)
{
numberOfItems--;
result.Data.Add(new S7DataItemSpecification
{
ReturnCode = (byte)item.ReturnCode,
TransportSize = (byte)item.TransportSize,
Length = item.NumberOfItems,
Data = item.Data,
FillByte = numberOfItems == 0 || item.NumberOfItems % 2 == 0 ? Array.Empty <byte>() : new byte[1],
ElementSize = item.ElementSize
});
if ((dataLength % 2) != 0)
{
dataLength++;
}
dataLength += (ushort)item.Data.Length;
}
}
result.Header.Header.ParamLength = (ushort)2;
result.Header.Header.DataLength = (ushort)(dataLength + result.Data.Count * 4);
result.ItemCount = (byte)result.Data.Count;
return(result);
}
public static IMemoryOwner <byte> TranslateToMemory(S7ReadJobAckDatagram datagram, out int memoryLength)
{
var result = S7AckDataDatagram.TranslateToMemory(datagram.Header, out memoryLength);
var take = memoryLength - datagram.Header.GetParameterOffset();
var mem = result.Memory.Slice(datagram.Header.GetParameterOffset(), take);
var span = mem.Span;
var offset = 0;
span[offset++] = datagram.Function;
span[offset++] = datagram.ItemCount;
foreach (var item in datagram.Data)
{
S7DataItemSpecification.TranslateToMemory(item, mem.Slice(offset));
offset += item.GetSpecificationLength();
if (offset % 2 != 0)
{
offset++;
}
}
return(result);
}