private void ReadFromStream_Ver_2(Stream input_stream, Encoding encoding, NpgsqlBackendTypeMapping type_mapping)
{
NpgsqlEventLog.LogMethodEnter(LogLevel.Debug, CLASSNAME, "ReadFromStream_Ver_2");
Byte[] input_buffer = new Byte[10]; // Max read will be 4 + 2 + 4
// Read the number of fields.
input_stream.Read(input_buffer, 0, 2);
Int16 num_fields = IPAddress.NetworkToHostOrder(BitConverter.ToInt16(input_buffer, 0));
// Temporary FieldData object to get data from stream and put in array.
NpgsqlRowDescriptionFieldData fd;
fields_data = new NpgsqlRowDescriptionFieldData[num_fields];
fields_index = new string[num_fields];
field_name_index_table = new Hashtable(num_fields);
// Now, iterate through each field getting its data.
for (Int16 i = 0; i < num_fields; i++)
{
fd = new NpgsqlRowDescriptionFieldData();
// Set field name.
fd.name = PGUtil.ReadString(input_stream, encoding);
// Read type_oid(Int32), type_size(Int16), type_modifier(Int32)
input_stream.Read(input_buffer, 0, 4 + 2 + 4);
fd.type_oid = IPAddress.NetworkToHostOrder(BitConverter.ToInt32(input_buffer, 0));
fd.type_info = type_mapping[fd.type_oid];
fd.type_size = IPAddress.NetworkToHostOrder(BitConverter.ToInt16(input_buffer, 4));
fd.type_modifier = IPAddress.NetworkToHostOrder(BitConverter.ToInt32(input_buffer, 6));
// Add field data to array.
fields_data[i] = fd;
fields_index[i] = fd.name;
if (!field_name_index_table.ContainsKey(fd.name))
{
field_name_index_table.Add(fd.name, i);
}
}
}
private void ReadFromStream_Ver_3(Stream input_stream, Encoding encoding, NpgsqlBackendTypeMapping type_mapping)
{
NpgsqlEventLog.LogMethodEnter(LogLevel.Debug, CLASSNAME, "ReadFromStream_Ver_3");
Byte[] input_buffer = new Byte[4]; // Max read will be 4 + 2 + 4 + 2 + 4 + 2
// Read the length of message.
// [TODO] Any use for now?
PGUtil.ReadInt32(input_stream, input_buffer);
Int16 num_fields = PGUtil.ReadInt16(input_stream, input_buffer);
// Temporary FieldData object to get data from stream and put in array.
NpgsqlRowDescriptionFieldData fd;
fields_data = new NpgsqlRowDescriptionFieldData[num_fields];
fields_index = new string[num_fields];
field_name_index_table = new Hashtable(num_fields);
for (Int16 i = 0; i < num_fields; i++)
{
fd = new NpgsqlRowDescriptionFieldData();
fd.name = PGUtil.ReadString(input_stream, encoding);
fd.table_oid = PGUtil.ReadInt32(input_stream, input_buffer);
fd.column_attribute_number = PGUtil.ReadInt16(input_stream, input_buffer);
fd.type_oid = PGUtil.ReadInt32(input_stream, input_buffer);
fd.type_info = type_mapping[fd.type_oid];
fd.type_size = PGUtil.ReadInt16(input_stream, input_buffer);
fd.type_modifier = PGUtil.ReadInt32(input_stream, input_buffer);
fd.format_code = (FormatCode)PGUtil.ReadInt16(input_stream, input_buffer);
fields_data[i] = fd;
fields_index[i] = fd.name;
if (!field_name_index_table.ContainsKey(fd.name))
{
field_name_index_table.Add(fd.name, i);
}
}
}
private void ReadFromStream_Ver_2(Stream inputStream, Encoding encoding)
{
NpgsqlEventLog.LogMethodEnter(LogLevel.Debug, CLASSNAME, "ReadFromStream_Ver_2");
Byte[] null_map_array = new Byte[(row_desc.NumFields + 7) / 8];
Array.Clear(null_map_array, 0, null_map_array.Length);
// Decoders used to get decoded chars when using unicode like encodings which may have chars crossing the byte buffer bounds.
Decoder decoder = encoding.GetDecoder();
// Read the null fields bitmap.
PGUtil.CheckedStreamRead(inputStream, null_map_array, 0, null_map_array.Length);
// Get the data.
for (Int16 field_count = 0; field_count < row_desc.NumFields; field_count++)
{
// Check if this field is null
if (IsBackendNull(null_map_array, field_count))
{
data.Add(DBNull.Value);
continue;
}
// Read the first data of the first row.
PGUtil.CheckedStreamRead(inputStream, _inputBuffer, 0, 4);
NpgsqlRowDescriptionFieldData field_descr = row_desc[field_count];
Int32 field_value_size = IPAddress.NetworkToHostOrder(BitConverter.ToInt32(_inputBuffer, 0));
field_value_size -= 4;
string result = ReadStringFromStream(inputStream, field_value_size, decoder);
// Add them to the AsciiRow data.
data.Add(NpgsqlTypesHelper.ConvertBackendStringToSystemType(field_descr.type_info, result, field_descr.type_size, field_descr.type_modifier));
}
}
private void ReadFromStream_Ver_3(Stream inputStream, Encoding encoding)
{
NpgsqlEventLog.LogMethodEnter(LogLevel.Debug, CLASSNAME, "ReadFromStream_Ver_3");
PGUtil.ReadInt32(inputStream, _inputBuffer);
Int16 numCols = PGUtil.ReadInt16(inputStream, _inputBuffer);
Decoder decoder = encoding.GetDecoder();
for (Int16 field_count = 0; field_count < numCols; field_count++)
{
Int32 field_value_size = PGUtil.ReadInt32(inputStream, _inputBuffer);
// Check if this field is null
if (field_value_size == -1) // Null value
{
data.Add(DBNull.Value);
continue;
}
NpgsqlRowDescriptionFieldData field_descr = row_desc[field_count];
if (row_desc[field_count].format_code == FormatCode.Text)
{
string result = ReadStringFromStream(inputStream, field_value_size, decoder);
// Add them to the AsciiRow data.
data.Add(NpgsqlTypesHelper.ConvertBackendStringToSystemType(field_descr.type_info, result, field_descr.type_size, field_descr.type_modifier));
}
else
{
Byte[] binary_data = ReadBytesFromStream(inputStream, field_value_size);
data.Add(NpgsqlTypesHelper.ConvertBackendBytesToSystemType(field_descr.type_info, binary_data, encoding, field_value_size, field_descr.type_modifier));
}
}
}
private void ReadFromStream_Ver_2(Stream input_stream, Encoding encoding, NpgsqlBackendTypeMapping type_mapping)
{
NpgsqlEventLog.LogMethodEnter(LogLevel.Debug, CLASSNAME, "ReadFromStream_Ver_2");
Byte[] input_buffer = new Byte[10]; // Max read will be 4 + 2 + 4
// Read the number of fields.
input_stream.Read(input_buffer, 0, 2);
Int16 num_fields = IPAddress.NetworkToHostOrder(BitConverter.ToInt16(input_buffer, 0));
// Temporary FieldData object to get data from stream and put in array.
NpgsqlRowDescriptionFieldData fd;
// Now, iterate through each field getting its data.
for (Int16 i = 0; i < num_fields; i++)
{
fd = new NpgsqlRowDescriptionFieldData();
// Set field name.
fd.name = PGUtil.ReadString(input_stream, encoding);
// Read type_oid(Int32), type_size(Int16), type_modifier(Int32)
input_stream.Read(input_buffer, 0, 4 + 2 + 4);
fd.type_oid = IPAddress.NetworkToHostOrder(BitConverter.ToInt32(input_buffer, 0));
fd.type_info = type_mapping[fd.type_oid];
fd.type_size = IPAddress.NetworkToHostOrder(BitConverter.ToInt16(input_buffer, 4));
fd.type_modifier = IPAddress.NetworkToHostOrder(BitConverter.ToInt32(input_buffer, 6));
// Add field data to array.
fields_data.Add(fd);
fields_index.Add(fd.name);
}
}
private void ReadFromStream_Ver_3(Stream input_stream, Encoding encoding, NpgsqlBackendTypeMapping type_mapping)
{
NpgsqlEventLog.LogMethodEnter(LogLevel.Debug, CLASSNAME, "ReadFromStream_Ver_3");
Byte[] input_buffer = new Byte[4]; // Max read will be 4 + 2 + 4 + 2 + 4 + 2
// Read the length of message.
// [TODO] Any use for now?
PGUtil.ReadInt32(input_stream, input_buffer);
Int16 num_fields = PGUtil.ReadInt16(input_stream, input_buffer);
// Temporary FieldData object to get data from stream and put in array.
NpgsqlRowDescriptionFieldData fd;
for (Int16 i = 0; i < num_fields; i++)
{
fd = new NpgsqlRowDescriptionFieldData();
fd.name = PGUtil.ReadString(input_stream, encoding);
fd.table_oid = PGUtil.ReadInt32(input_stream, input_buffer);
fd.column_attribute_number = PGUtil.ReadInt16(input_stream, input_buffer);
fd.type_oid = PGUtil.ReadInt32(input_stream, input_buffer);
fd.type_info = type_mapping[fd.type_oid];
fd.type_size = PGUtil.ReadInt16(input_stream, input_buffer);
fd.type_modifier = PGUtil.ReadInt32(input_stream, input_buffer);
fd.format_code = (FormatCode)PGUtil.ReadInt16(input_stream, input_buffer);
fields_data.Add(fd);
fields_index.Add(fd.name);
}
}