protected override Array ReadData(int[] origin, int[] stride, int[] shape)
{
// TODO: there is a problem using nc_get_vars_string!!!
// remove this trick:
if (TypeOfData == typeof(string))
{
return(base.ReadData(origin, stride, shape));
}
if (origin == null)
{
origin = new int[Rank];
}
if (shape == null)
{
shape = ReadShape();
for (int i = 0; i < shape.Length; i++)
{
shape[i] -= origin[i];
}
}
if (stride == null)
{
origin = new int[Rank];
for (int i = 0; i < Rank; i++)
{
stride[i] = 1;
}
}
if (Rank == 0)
{
shape = new int[] { 1 }
}
; // the place for data
// Total number of elements in the array
int n = 1;
for (int i = 0; i < shape.Length; i++)
{
n *= shape[i];
}
int res;
switch (Type.GetTypeCode(TypeOfData))
{
case TypeCode.Boolean:
if (n == 0)
{
return(Array.CreateInstance(typeof(bool), Rank == 0 ? new int[1] : new int[Rank]));
}
byte[] blData = new byte[n];
res = NetCDF.nc_get_vars_ubyte(NcId, varid, ConvertToIntPtr(origin), ConvertToIntPtr(shape), ConvertToIntPtr(stride), blData);
NetCDFDataSet.HandleResult(res);
return(ToMultidimArrayBool(blData, shape));
case TypeCode.DateTime:
double[] dtData = new double[n];
if (n == 0)
{
return(Array.CreateInstance(typeof(DateTime), Rank == 0 ? new int[1] : new int[Rank]));
}
res = NetCDF.nc_get_vars_double(NcId, varid, ConvertToIntPtr(origin), ConvertToIntPtr(shape), ConvertToIntPtr(stride), dtData);
NetCDFDataSet.HandleResult(res);
return(ToMultidimArrayDateTime(dtData, shape));
case TypeCode.Double:
double[] data = new double[n];
if (n == 0)
{
return(Array.CreateInstance(typeof(double), Rank == 0 ? new int[1] : new int[Rank]));
}
res = NetCDF.nc_get_vars_double(NcId, varid, ConvertToIntPtr(origin), ConvertToIntPtr(shape), ConvertToIntPtr(stride), data);
NetCDFDataSet.HandleResult(res);
return(ToMultidimArray(data, shape));
case TypeCode.Single:
float[] fdata = new float[n];
if (n == 0)
{
return(Array.CreateInstance(typeof(float), Rank == 0 ? new int[1] : new int[Rank]));
}
res = NetCDF.nc_get_vars_float(NcId, varid, ConvertToIntPtr(origin), ConvertToIntPtr(shape), ConvertToIntPtr(stride), fdata);
NetCDFDataSet.HandleResult(res);
return(ToMultidimArray(fdata, shape));
case TypeCode.Int64:
long[] ldata = new long[n];
if (n == 0)
{
return(Array.CreateInstance(typeof(long), Rank == 0 ? new int[1] : new int[Rank]));
}
res = NetCDF.nc_get_vars_longlong(NcId, varid, ConvertToIntPtr(origin), ConvertToIntPtr(shape), ConvertToIntPtr(stride), ldata);
NetCDFDataSet.HandleResult(res);
return(ToMultidimArray(ldata, shape));
case TypeCode.UInt64:
ulong[] uldata = new ulong[n];
if (n == 0)
{
return(Array.CreateInstance(typeof(ulong), Rank == 0 ? new int[1] : new int[Rank]));
}
res = NetCDF.nc_get_vars_ulonglong(NcId, varid, ConvertToIntPtr(origin), ConvertToIntPtr(shape), ConvertToIntPtr(stride), uldata);
NetCDFDataSet.HandleResult(res);
return(ToMultidimArray(uldata, shape));
case TypeCode.Int32:
int[] idata = new int[n];
if (n == 0)
{
return(Array.CreateInstance(typeof(int), Rank == 0 ? new int[1] : new int[Rank]));
}
res = NetCDF.nc_get_vars_int(NcId, varid, ConvertToIntPtr(origin), ConvertToIntPtr(shape), ConvertToIntPtr(stride), idata);
NetCDFDataSet.HandleResult(res);
return(ToMultidimArray(idata, shape));
case TypeCode.UInt32:
uint[] uidata = new uint[n];
if (n == 0)
{
return(Array.CreateInstance(typeof(uint), Rank == 0 ? new int[1] : new int[Rank]));
}
res = NetCDF.nc_get_vars_uint(NcId, varid, ConvertToIntPtr(origin), ConvertToIntPtr(shape), ConvertToIntPtr(stride), uidata);
NetCDFDataSet.HandleResult(res);
return(ToMultidimArray(uidata, shape));
case TypeCode.Int16:
short[] sdata = new short[n];
if (n == 0)
{
return(Array.CreateInstance(typeof(short), Rank == 0 ? new int[1] : new int[Rank]));
}
res = NetCDF.nc_get_vars_short(NcId, varid, ConvertToIntPtr(origin), ConvertToIntPtr(shape), ConvertToIntPtr(stride), sdata);
NetCDFDataSet.HandleResult(res);
return(ToMultidimArray(sdata, shape));
case TypeCode.UInt16:
ushort[] usdata = new ushort[n];
if (n == 0)
{
return(Array.CreateInstance(typeof(ushort), Rank == 0 ? new int[1] : new int[Rank]));
}
res = NetCDF.nc_get_vars_ushort(NcId, varid, ConvertToIntPtr(origin), ConvertToIntPtr(shape), ConvertToIntPtr(stride), usdata);
NetCDFDataSet.HandleResult(res);
return(ToMultidimArray(usdata, shape));
case TypeCode.Byte:
byte[] bdata = new byte[n];
if (n == 0)
{
return(Array.CreateInstance(typeof(byte), Rank == 0 ? new int[1] : new int[Rank]));
}
res = NetCDF.nc_get_vars_ubyte(NcId, varid, ConvertToIntPtr(origin), ConvertToIntPtr(shape), ConvertToIntPtr(stride), bdata);
NetCDFDataSet.HandleResult(res);
return(ToMultidimArray(bdata, shape));
case TypeCode.SByte:
SByte[] cdata = new SByte[n];
if (n == 0)
{
return(Array.CreateInstance(typeof(SByte), Rank == 0 ? new int[1] : new int[Rank]));
}
res = NetCDF.nc_get_vars_schar(NcId, varid, ConvertToIntPtr(origin), ConvertToIntPtr(shape), ConvertToIntPtr(stride), cdata);
if (res == -56)
{
res = NetCDF.nc_get_vars_text(NcId, varid, ConvertToIntPtr(origin), ConvertToIntPtr(shape), ConvertToIntPtr(stride), cdata);
}
NetCDFDataSet.HandleResult(res);
return(ToMultidimArray(cdata, shape));
case TypeCode.String:
if (n == 0)
{
return(Array.CreateInstance(typeof(string), Rank == 0 ? new int[1] : new int[Rank]));
}
IntPtr[] strdata = new IntPtr[n];
res = NetCDF.nc_get_vars_string(NcId, varid, ConvertToIntPtr(origin), ConvertToIntPtr(shape), ConvertToIntPtr(stride), strdata);
NetCDFDataSet.HandleResult(res);
string[] strings = new string[n];
for (int i = 0; i < n; i++)
{
strings[i] = UTF8Marshal.PtrToStringUTF8(strdata[i]); //Marshal.PtrToStringAnsi(strdata[i]);
res = NetCDF.nc_free_string(new IntPtr(1), new IntPtr[] { strdata[i] });
NetCDFDataSet.HandleResult(res);
}
// TODO: the memory must be freed?
//res = NetCDF.nc_free_string(1, strdata);
//NetCDFDataSet.HandleResult(res);
return(ToMultidimArray(strings, shape));
default:
throw new NotSupportedException("Unsupported type of data.");
}
}