/// <summary>
/// Reads the message at the current location of an Hdf5Reader
/// </summary>
/// <returns>The message.</returns>
/// <param name="aReader">A reader.</param>
/// <param name="aReadFlags">Flags that describe how to handle this message</param>
/// <param name="aMessageType">Type of message to read</param>
/// <param name="aLocalMessageSize">Number of bytes to read</param>
/// <param name="aBytes">Number of bytes that were actually read</param>
public static Message Read(
Hdf5Reader aReader,
MessageType aMessageType,
MessageAttributeFlag aReadFlags,
long?aLocalMessageSize,
out long aBytes)
{
switch (aMessageType)
{
case MessageType.NIL:
aBytes = 0;
return(new Nil());
case MessageType.Dataspace:
return(Dataspace.Read(
aReader,
aLocalMessageSize,
out aBytes));
case MessageType.LinkInfo:
return(LinkInfo.Read(
aReader,
aLocalMessageSize,
out aBytes));
case MessageType.Datatype:
return(Datatype.Read(
aReader,
aLocalMessageSize,
out aBytes));
default:
if (aReadFlags.HasFlag(MessageAttributeFlag.MustUnderstandToRead))
{
throw new Exceptions.RequiredMessageNotUnderstood(
$"Message type {aMessageType} must be understood for this object to be valid");
}
break;
}
throw new NotImplementedException();//TODO: Add 'Not Undestood' message
}
internal static Datatype ReadMessage(
DatatypeHeader aHeader,
Hdf5Reader aReader,
long?aLocalMessageSize,
out long aBytes)
{
if (aHeader.Class != DatatypeClass.Array)
{
throw new ArgumentException(
$"aHeader must be for type {nameof(DatatypeClass.Array)}");
}
bool
fReadPermutaions;
long
fSize = sizeof(uint);
switch (aHeader.Version)
{
case DatatypeVersion.Version1:
throw new UnknownMessageVersion <ArrayDataType>(
(int)aHeader.Version,
"Arrays are not supported in verion 1");
case DatatypeVersion.Version2:
fReadPermutaions = true;
break;
default:
fReadPermutaions = false;
break;
}
byte
fDimensionality = aReader.ReadByte();
aReader.Seek(3, System.IO.SeekOrigin.Current); // Reserved bytes
uint[]
fDimeensions = Enumerable
.Range(0, fDimensionality)
.Select(a => aReader.ReadUInt32())
.ToArray();
fSize += fDimensionality * sizeof(uint);
if (fReadPermutaions)
{
if (!Enumerable.Range(0, fDimeensions.Length).All(a => a == aReader.ReadUInt32()))
{
throw new Hdf5UnsupportedFeature("Custom permutations not supported");
}
fSize += fDimensionality * sizeof(uint);
}
long?
fBaseLocalmessageSize = aLocalMessageSize;
if (fBaseLocalmessageSize.HasValue)
{
fBaseLocalmessageSize -= fSize;
}
long
fBaseTypeSize;
Datatype
fBaseType = Datatype.Read(aReader, fBaseLocalmessageSize, out fBaseTypeSize);
aBytes = fSize + fBaseTypeSize;
return(new ArrayDataType(aHeader, fDimeensions, fBaseType));
}