/// <summary>
/// Reads a string scalar attribute value.
/// Assumes that the parent object is already open.
/// </summary>
/// <param name="_objectId"></param>
/// <param name="_title"></param>
/// <returns></returns>
public static Hdf5Attribute GetStringAttribute(Hdf5Identifier _objectId, string _title)
{
int attributeId = 0;
int typeId = 0;
attributeId = H5A.open(_objectId.Value, _title);
typeId = H5A.get_type(attributeId);
var sizeData = H5T.get_size(typeId);
var size = sizeData.ToInt32();
byte[] strBuffer = new byte[size];
var aTypeMem = H5T.get_native_type(typeId, H5T.direction_t.ASCEND);
GCHandle pinnedArray = GCHandle.Alloc(strBuffer, GCHandleType.Pinned);
H5A.read(attributeId, aTypeMem, pinnedArray.AddrOfPinnedObject());
pinnedArray.Free();
H5T.close(aTypeMem);
string value = System.Text.Encoding.ASCII.GetString(strBuffer, 0, strBuffer.Length - 1);
var attribute = new Hdf5Attribute
{
Id = attributeId.ToId(),
Name = _title,
Value = value
};
if (attributeId > 0)
{
H5A.close(attributeId);
}
if (typeId > 0)
{
H5T.close(typeId);
}
return(attribute);
}
private object GetAttributeValue(int _h5FileId, string attributeName)
{
H5AttributeId attId = H5A.open(_h5FileId, attributeName);
if (attId == 0)
{
return(null);
}
H5DataTypeId typeId = 0;
H5DataTypeId dtId = 0;
H5A.info_t attInfo = new H5A.info_t();
H5DataSpaceId spaceId = 0;
H5DataTypeId oldTypeId = 0;
object retObject = null;
try
{
typeId = H5A.get_type(attId);
H5A.get_info(attId, ref attInfo);
dtId = H5A.get_type(attId);
spaceId = H5A.get_space(attId);
IntPtr dataSize = H5T.get_size(dtId);
//
oldTypeId = typeId;
typeId = H5T.get_native_type(typeId, H5T.direction_t.DEFAULT);
H5T.class_t typeClass = H5T.get_class(typeId);
int ndims = H5S.get_simple_extent_ndims(spaceId);
ulong[] dims = new ulong[ndims];
H5S.get_simple_extent_dims(spaceId, dims, null);
ulong dimSize = 1;
if (dims.Length == 0)
{
dimSize = 1;
}
else
{
foreach (ulong dim in dims)
{
dimSize *= dim;
}
}
switch (typeClass)
{
case H5T.class_t.NO_CLASS:
break;
case H5T.class_t.INTEGER:
// H5T.Sign.TWOS_COMPLEMENT;
H5T.sign_t sign = H5T.get_sign(oldTypeId);
switch (dataSize.ToInt32())
{
case 1:
retObject = ReadArray <byte>(dimSize, attId, typeId);
break;
case 2:
switch (sign)
{
case H5T.sign_t.SGN_2:
retObject = ReadArray <Int16>(dimSize, attId, typeId);
break;
case H5T.sign_t.NONE:
retObject = ReadArray <UInt16>(dimSize, attId, typeId);
break;
}
break;
case 4:
switch (sign)
{
case H5T.sign_t.SGN_2:
retObject = ReadArray <Int32>(dimSize, attId, typeId);
break;
case H5T.sign_t.NONE:
retObject = ReadArray <UInt32>(dimSize, attId, typeId);
break;
}
break;
case 8:
switch (sign)
{
case H5T.sign_t.SGN_2:
retObject = ReadArray <Int64>(dimSize, attId, typeId);
break;
case H5T.sign_t.NONE:
retObject = ReadArray <UInt64>(dimSize, attId, typeId);
break;
}
break;
}
break;
case H5T.class_t.FLOAT:
switch (dataSize.ToInt32())
{
case 4:
retObject = ReadArray <float>(dimSize, attId, typeId);
break;
case 8:
retObject = ReadArray <double>(dimSize, attId, typeId);
break;
}
break;
case H5T.class_t.STRING:
ulong size = attInfo.data_size;
byte[] chars = ReadArray <byte>(size, attId, typeId);
retObject = Encoding.ASCII.GetString(chars);
break;
default:
break;
}
return(retObject);
}
finally
{
if (spaceId != 0)
{
H5S.close(spaceId);
}
if (attId != 0)
{
H5A.close(attId);
}
if (oldTypeId != 0)
{
H5T.close(oldTypeId);
}
if (typeId != 0)
{
H5T.close(typeId);
}
if (dtId != 0)
{
H5T.close(dtId);
}
}
}
