internal override void WriteFully(NpgsqlWriteBuffer buf)
{
Debug.Assert(Name != null && Name.All(c => c < 128));
buf.WriteByte(Code);
buf.WriteInt32(Length - 1);
buf.WriteByte((byte)StatementOrPortal);
buf.WriteNullTerminatedString(Name);
}
internal PgServerMock WriteRowDescription(params FieldDescription[] fields)
{
CheckDisposed();
_writeBuffer.WriteByte((byte)BackendMessageCode.RowDescription);
_writeBuffer.WriteInt32(4 + 2 + fields.Sum(f => Encoding.GetByteCount(f.Name) + 1 + 18));
_writeBuffer.WriteInt16(fields.Length);
foreach (var field in fields)
{
_writeBuffer.WriteNullTerminatedString(field.Name);
_writeBuffer.WriteUInt32(field.TableOID);
_writeBuffer.WriteInt16(field.ColumnAttributeNumber);
_writeBuffer.WriteUInt32(field.TypeOID);
_writeBuffer.WriteInt16(field.TypeSize);
_writeBuffer.WriteInt32(field.TypeModifier);
_writeBuffer.WriteInt16((short)field.FormatCode);
}
return(this);
}
internal override async Task Write(NpgsqlWriteBuffer buf, bool async)
{
Debug.Assert(Statement != null && Statement.All(c => c < 128));
var queryByteLen = _encoding.GetByteCount(Query);
if (buf.WriteSpaceLeft < 1 + 4 + Statement.Length + 1)
{
await buf.Flush(async);
}
var messageLength =
1 + // Message code
4 + // Length
Statement.Length +
1 + // Null terminator
queryByteLen +
1 + // Null terminator
2 + // Number of parameters
ParameterTypeOIDs.Count * 4;
buf.WriteByte(Code);
buf.WriteInt32(messageLength - 1);
buf.WriteNullTerminatedString(Statement);
await buf.WriteString(Query, queryByteLen, async);
if (buf.WriteSpaceLeft < 1 + 2)
{
await buf.Flush(async);
}
buf.WriteByte(0); // Null terminator for the query
buf.WriteInt16((short)ParameterTypeOIDs.Count);
foreach (var t in ParameterTypeOIDs)
{
if (buf.WriteSpaceLeft < 4)
{
await buf.Flush(async);
}
buf.WriteInt32((int)t);
}
}
internal override async Task Write(NpgsqlWriteBuffer buf, bool async)
{
Debug.Assert(Statement != null && Statement.All(c => c < 128));
Debug.Assert(Portal != null && Portal.All(c => c < 128));
var headerLength =
1 + // Message code
4 + // Message length
1 + // Portal is always empty (only a null terminator)
Statement.Length + 1 +
2; // Number of parameter format codes that follow
if (buf.WriteSpaceLeft < headerLength)
{
Debug.Assert(buf.Size >= headerLength, "Buffer too small for Bind header");
await buf.Flush(async);
}
var formatCodesSum = 0;
var paramsLength = 0;
foreach (var p in InputParameters)
{
formatCodesSum += (int)p.FormatCode;
p.LengthCache?.Rewind();
paramsLength += p.ValidateAndGetLength();
}
var formatCodeListLength = formatCodesSum == 0 ? 0 : formatCodesSum == InputParameters.Count ? 1 : InputParameters.Count;
var messageLength = headerLength +
2 * formatCodeListLength + // List of format codes
2 + // Number of parameters
4 * InputParameters.Count + // Parameter lengths
paramsLength + // Parameter values
2 + // Number of result format codes
2 * (UnknownResultTypeList?.Length ?? 1); // Result format codes
buf.WriteByte(Code);
buf.WriteInt32(messageLength - 1);
Debug.Assert(Portal == string.Empty);
buf.WriteByte(0); // Portal is always empty
buf.WriteNullTerminatedString(Statement);
buf.WriteInt16(formatCodeListLength);
// 0 length implicitly means all-text, 1 means all-binary, >1 means mix-and-match
if (formatCodeListLength == 1)
{
if (buf.WriteSpaceLeft < 2)
{
await buf.Flush(async);
}
buf.WriteInt16((short)FormatCode.Binary);
}
else if (formatCodeListLength > 1)
{
foreach (var p in InputParameters)
{
if (buf.WriteSpaceLeft < 2)
{
await buf.Flush(async);
}
buf.WriteInt16((short)p.FormatCode);
}
}
if (buf.WriteSpaceLeft < 2)
{
await buf.Flush(async);
}
buf.WriteInt16(InputParameters.Count);
foreach (var param in InputParameters)
{
param.LengthCache?.Rewind();
await param.WriteWithLength(buf, async);
}
if (UnknownResultTypeList != null)
{
if (buf.WriteSpaceLeft < 2 + UnknownResultTypeList.Length * 2)
{
await buf.Flush(async);
}
buf.WriteInt16(UnknownResultTypeList.Length);
foreach (var t in UnknownResultTypeList)
{
buf.WriteInt16(t ? 0 : 1);
}
}
else
{
if (buf.WriteSpaceLeft < 4)
{
await buf.Flush(async);
}
buf.WriteInt16(1);
buf.WriteInt16(AllResultTypesAreUnknown ? 0 : 1);
}
}