private static void WriteAttValue(NetCDFDataType dataType, object value)
{
switch (dataType)
{
case NetCDFDataType.NcByte:
byte byteValue = (byte)value;
writer.Write(byteValue);
break;
case NetCDFDataType.NcChar:
string[] strValue = (string[])value;
for (int i = 0; i < strValue.Length; i++)
{
WriteInteger(strValue[i].Length);
WriteString(strValue[i]);
}
break;
case NetCDFDataType.NcShort:
short[] shA = (short[])value;
WriteInteger(shA.Length);
for (int i = 0; i < shA.Length; i++)
{
WriteShort(shA[i]);
}
break;
case NetCDFDataType.NcInt:
int[] intA = (int[])value;
WriteInteger(intA.Length);
for (int i = 0; i < intA.Length; i++)
{
WriteInteger(intA[i]);
}
break;
case NetCDFDataType.NcFloat:
float[] flA = (float[])value;
WriteInteger(flA.Length);
for (int i = 0; i < flA.Length; i++)
{
WriteFloat(flA[i]);
}
break;
case NetCDFDataType.NcDouble:
double[] dbA = (double[])value;
WriteInteger(dbA.Length);
for (int i = 0; i < dbA.Length; i++)
{
WriteDouble(dbA[i]);
}
break;
}
}
/// <summary>
/// Writes attribute
/// </summary>
/// <param name="attribType"></param>
/// <param name="attribName"></param>
/// <param name="attribVal"></param>
public static void WriteAttribute(NetCDFDataType dataType, string attribName, object[] attVal)
{
//Number of Characters in name
WriteInteger(attribName.Length);
//write attribute name
WriteString(attribName);
//Write data type tag for the attribute
WriteInteger((int)dataType);
//Write variable / attribute values as per the data type
for (int i = 0; i < attVal.Length; i++)
{
WriteAttValue(dataType, attVal[i]);
}
}
private static void WriteVariableValues(NetCDFDataType dataType, int offset, string variableName, int recordSize, object[] values)
{
//First overwrite the size bytes and offset values for the variable
//HERE THE SIZE AND OFFSET VALUES ARE OVERWRITTEN.
if (offset != -1)
{
writer.Seek(offset, SeekOrigin.Begin);
//Size
//WriteInteger(GetByteSize((int)dataType));
WriteInteger(GetByteSize(recordSize));
// update offset value only for the first time
WriteInteger((int)writer.BaseStream.Length);
}
// Seek to the end of the file again if the record is updated.
writer.Seek((int)writer.BaseStream.Length, SeekOrigin.Begin);
//Now start writing values of the variable
for (int i = 0; i < values.Length; i++)
{
WriteVarValue(dataType, values[i]);
}
}
public static Type GetClrType(NetCDFDataType ncType)
{
Type clrType = null;
switch (ncType)
{
case NetCDFDataType.NcByte:
clrType = typeof(byte);
break;
case NetCDFDataType.NcChar:
clrType = typeof(char);
break;
case NetCDFDataType.NcDouble:
clrType = typeof(double);
break;
case NetCDFDataType.NcInt:
clrType = typeof(Int32);
break;
//case NetCDFDataType.NcLong:
// clrType = typeof(long);
// break;
case NetCDFDataType.NcShort:
clrType = typeof(short);
break;
case NetCDFDataType.NcFloat:
clrType = typeof(float);
break;
}
return(clrType);
}
/// <summary>
///
/// </summary>
/// <param name="name">Variable name</param>
/// <param name="dimensions"></param>
/// <param name="attributes"></param>
/// <param name="offset"></param>
public NetCDFVariable(string name, uint[] dimensions, Dictionary <string, INetCDFAttribute> attributes, NetCDFDataType dataType, uint variableSize, int dataOffset, bool isARecordVariable)
{
this.Name = name;
this.DimensionIDs = dimensions;
this.Attributes = attributes;
this.DataType = dataType;
this.Size = variableSize;
this._dataOffsetInFile = dataOffset;
this.IsRecordVariable = isARecordVariable;
}
private static void WriteVarValue(NetCDFDataType dataType, object value)
{
switch (dataType)
{
case NetCDFDataType.NcByte:
if (null != value)
{
byte byteValue = (byte)value;
writer.Write(byteValue);
}
else
{
writer.Write(0);
}
break;
case NetCDFDataType.NcChar:
if (null != value)
{
string[] strValue = (string[])value;
for (int i = 0; i < strValue.Length; i++)
{
WriteInteger(strValue[i].Length);
WriteString(strValue[i]);
}
}
else
{
WriteInteger(0);
WriteInteger(0);
}
break;
case NetCDFDataType.NcShort:
if (null != value)
{
short shA = (short)value;
WriteShort(shA);
}
else
{
WriteShort(-255);
}
break;
case NetCDFDataType.NcInt:
if (null != value)
{
int intA = (int)value;
WriteInteger(intA);
}
else
{
WriteInteger(int.MinValue);
}
break;
case NetCDFDataType.NcFloat:
if (null != value)
{
float flA = (float)value;
WriteFloat(flA);
}
else
{
WriteFloat(float.MinValue);
}
break;
case NetCDFDataType.NcDouble:
if (null != value)
{
double dbA = (double)value;
WriteDouble(dbA);
}
else
{
WriteDouble(double.MinValue);
}
break;
}
}
/// <summary>
/// Reads the attributes array from NetCDF file and places them in the
/// Dictionary.
/// </summary>
/// <param name="attributes">Dictionary into which attributes are placed.</param>
/// <exception cref="Microsoft.NetCDF.CSharpAPI.ParserException"></exception>
/// <returns>Number of attributes read from the NetCDF file</returns>
private uint ReadAttributes(Dictionary <string, INetCDFAttribute> attributes)
{
int metadata_type_flag = _reader.ReadInt32();
uint attributes_count = 0;
if ((NetCDFMetadataType)metadata_type_flag == NetCDFMetadataType.NcAttribute)
{
attributes_count = _reader.ReadUInt32();
for (int i = 0; i < attributes_count; i++)
{
uint name_length = _reader.ReadUInt32();
string name = _reader.ReadString(name_length, true);
NetCDFDataType data_type = (NetCDFDataType)_reader.ReadInt32();
uint size = _reader.ReadUInt32();
switch (data_type)
{
case NetCDFDataType.NcByte:
byte[] bytes = _reader.ReadBytes(size, true);
attributes.Add(name,
new NetCDFAttribute <byte>(name, bytes, data_type));
break;
case NetCDFDataType.NcChar:
string chars = _reader.ReadString(size, true);
string[] str = new string[1];
str[0] = chars;
attributes.Add(name,
new NetCDFAttribute <string>(name, str, data_type));
break;
case NetCDFDataType.NcShort:
short[] shorts = _reader.ReadShorts(size, true);
attributes.Add(name,
new NetCDFAttribute <short>(name, shorts, data_type));
break;
case NetCDFDataType.NcInt:
int[] integers = _reader.ReadIntegers(size);
attributes.Add(name,
new NetCDFAttribute <int>(name, integers, data_type));
break;
case NetCDFDataType.NcFloat:
float[] floats = _reader.ReadSingles(size);
attributes.Add(name,
new NetCDFAttribute <float>(name, floats, data_type));
break;
case NetCDFDataType.NcDouble:
double[] doubles = _reader.ReadDoubles(size);
attributes.Add(name,
new NetCDFAttribute <double>(name, doubles, data_type));
break;
}
}
}
else if (metadata_type_flag == 0)
{
// read the next 4 bytes to position the pointer at the start
// of the variables array.
attributes_count = (uint)_reader.ReadInt32();
// If this condition is met, raise a parser exception.
if (attributes_count != 0)
{
string message =
String.Format("Expected ZERO value for attribute count. But actual value is {0}",
attributes_count);
throw new ParserException(message);
}
}
// If we reach here, raise a parser exception.
else
{
string message = "Attribute metadata type token expected, but not found.";
throw new ParserException(message);
}
return(attributes_count);
}
/// <summary>
/// Reads metadata of the variables defined in the NetCDF file.
/// </summary>
/// <exception cref="Microsoft.NetCDF.CSharpAPI.ParserException"></exception>
/// <returns>Count of variables</returns>
private uint ReadVariables()
{
int metadata_type_flag = _reader.ReadInt32();
uint variables_count = 0;
if ((NetCDFMetadataType)metadata_type_flag == NetCDFMetadataType.NcVariable)
{
variables_count = _reader.ReadUInt32();
for (uint i = 0; i < variables_count; i++)
{
uint name_length = _reader.ReadUInt32();
string name = _reader.ReadString(name_length, true);
uint dimensionality = _reader.ReadUInt32();
uint[] dimension_ids = new uint[dimensionality];
for (uint j = 0; j < dimensionality; j++)
{
dimension_ids[j] = _reader.ReadUInt32();
}
bool is_record_variable = this.Dimensions[dimension_ids[0]].IsRecordDimension;
Dictionary <string, INetCDFAttribute> variable_attributes =
new Dictionary <string, INetCDFAttribute>();
this.ReadAttributes(variable_attributes);
NetCDFDataType data_type = (NetCDFDataType)_reader.ReadInt32();
uint variable_size = _reader.ReadUInt32();
_recordSize += is_record_variable ? (int)variable_size : 0;
int data_offset = _reader.ReadInt32();
switch (data_type)
{
case NetCDFDataType.NcByte:
NetCDFVariable <byte> var_bytes =
new NetCDFVariable <byte>(name,
dimension_ids, variable_attributes,
data_type, variable_size, data_offset,
is_record_variable);
this.variables.Add(name, var_bytes);
break;
case NetCDFDataType.NcChar:
NetCDFVariable <char> var_chars =
new NetCDFVariable <char>(name,
dimension_ids, variable_attributes,
data_type, variable_size, data_offset,
is_record_variable);
this.variables.Add(name, var_chars);
break;
case NetCDFDataType.NcShort:
NetCDFVariable <short> var_shorts =
new NetCDFVariable <short>(name,
dimension_ids, variable_attributes,
data_type, variable_size, data_offset,
is_record_variable);
this.variables.Add(name, var_shorts);
break;
case NetCDFDataType.NcInt:
NetCDFVariable <int> var_ints =
new NetCDFVariable <int>(name,
dimension_ids, variable_attributes,
data_type, variable_size, data_offset,
is_record_variable);
this.variables.Add(name, var_ints);
break;
case NetCDFDataType.NcFloat:
NetCDFVariable <float> var_floats =
new NetCDFVariable <float>(name,
dimension_ids, variable_attributes,
data_type, variable_size, data_offset,
is_record_variable);
this.variables.Add(name, var_floats);
break;
case NetCDFDataType.NcDouble:
NetCDFVariable <double> var_doubles =
new NetCDFVariable <double>(name,
dimension_ids, variable_attributes,
data_type, variable_size, data_offset,
is_record_variable);
this.variables.Add(name, var_doubles);
break;
}
}
}
else if (metadata_type_flag == 0)
{
// read the next 4 bytes to position the pointer at the start
// of the data section.
variables_count = (uint)_reader.ReadInt32();
// If this condition is met, raise a parser exception.
if (variables_count != 0)
{
string message =
String.Format("Expected ZERO value for variables count. But actual value is {0}",
variables_count);
throw new ParserException(message);
}
}
// If we reach here, raise a parser exception.
else
{
string message = "Variable metadata type token expected, but not found.";
throw new ParserException(message);
}
return(variables_count);
}
public NetCDFAttribute(string name, T[] values, NetCDFDataType dataType)
{
this._values = values;
this._name = name;
this._dataType = dataType;
}
