public override string ToString()
{
if (InputParameters == null && InputValues == null)
{
return(string.Empty);
}
if (InputParameters == null)
{
return(ObjectToStringConverter.ConvertCollectionToString(InputValues));
}
if (InputValues == null)
{
return(ObjectToStringConverter.ConvertCollectionToString(InputParameters.Select(p => p.Name)));
}
return(ObjectToStringConverter.ConvertSomeToString(InputParameters.Select(p => p.Name).ToArray(), InputValues));
}
internal override bool Write(NpgsqlBuffer buf, ref byte[] directBuf)
{
Contract.Requires(Statement != null && Statement.All(c => c < 128));
Contract.Requires(Portal != null && Portal.All(c => c < 128));
switch (_state)
{
case State.WroteNothing:
var formatCodesSum = InputParameters.Select(p => p.FormatCode).Sum(c => (int)c);
var formatCodeListLength = formatCodesSum == 0 ? 0 : formatCodesSum == InputParameters.Count ? 1 : InputParameters.Count;
var headerLength =
4 + // Message length
Portal.Length + 1 +
Statement.Length + 1 +
2 + // Number of parameter format codes that follow
2 * formatCodeListLength + // List of format codes
2; // Number of parameters
if (buf.WriteSpaceLeft < headerLength)
{
if (buf.Size < headerLength)
{
throw new Exception("Buffer too small for Bind header");
}
return(false);
}
var messageLength = headerLength +
4 * InputParameters.Count + // Parameter lengths
InputParameters.Select(p => p.BoundSize).Sum() + // Parameter values
2 + // Number of result format codes
2 * (UnknownResultTypeList == null ? 1 : UnknownResultTypeList.Length); // Result format codes
buf.WriteByte(Code);
buf.WriteInt32(messageLength);
buf.WriteBytesNullTerminated(Encoding.ASCII.GetBytes(Portal));
buf.WriteBytesNullTerminated(Encoding.ASCII.GetBytes(Statement));
// 0 implicitly means all-text, 1 means all binary, >1 means mix-and-match
buf.WriteInt16(formatCodeListLength);
if (formatCodeListLength == 1)
{
buf.WriteInt16((short)FormatCode.Binary);
}
else if (formatCodeListLength > 1)
{
foreach (var code in InputParameters.Select(p => p.FormatCode))
{
buf.WriteInt16((short)code);
}
}
buf.WriteInt16(InputParameters.Count);
_state = State.WroteHeader;
goto case State.WroteHeader;
case State.WroteHeader:
if (!WriteParameters(buf, ref directBuf))
{
return(false);
}
_state = State.WroteParameters;
goto case State.WroteParameters;
case State.WroteParameters:
if (UnknownResultTypeList != null)
{
if (buf.WriteSpaceLeft < 2 + UnknownResultTypeList.Length * 2)
{
return(false);
}
buf.WriteInt16(UnknownResultTypeList.Length);
foreach (var t in UnknownResultTypeList)
{
buf.WriteInt16(t ? 0 : 1);
}
}
else
{
if (buf.WriteSpaceLeft < 4)
{
return(false);
}
buf.WriteInt16(1);
buf.WriteInt16(AllResultTypesAreUnknown ? 0 : 1);
}
_state = State.Done;
return(true);
default:
throw PGUtil.ThrowIfReached();
}
}
internal bool Write(WriteBuffer buf, ref DirectBuffer directBuf)
{
Contract.Requires(Statement != null && Statement.All(c => c < 128));
Contract.Requires(Portal != null && Portal.All(c => c < 128));
switch (_state)
{
case State.Header:
var formatCodesSum = InputParameters.Select(p => p.FormatCode).Sum(c => (int)c);
_formatCodeListLength = formatCodesSum == 0 ? 0 : formatCodesSum == InputParameters.Count ? 1 : InputParameters.Count;
var headerLength =
1 + // Message code
4 + // Message length
Portal.Length + 1 +
Statement.Length + 1 +
2; // Number of parameter format codes that follow
if (buf.WriteSpaceLeft < headerLength)
{
Contract.Assume(buf.Size >= headerLength, "Buffer too small for Bind header");
return(false);
}
foreach (var c in InputParameters.Select(p => p.LengthCache).Where(c => c != null))
{
c.Rewind();
}
var messageLength = headerLength +
2 * _formatCodeListLength + // List of format codes
2 + // Number of parameters
4 * InputParameters.Count + // Parameter lengths
InputParameters.Select(p => p.ValidateAndGetLength()).Sum() + // Parameter values
2 + // Number of result format codes
2 * (UnknownResultTypeList?.Length ?? 1); // Result format codes
buf.WriteByte(Code);
buf.WriteInt32(messageLength - 1);
buf.WriteBytesNullTerminated(Encoding.ASCII.GetBytes(Portal));
buf.WriteBytesNullTerminated(Encoding.ASCII.GetBytes(Statement));
buf.WriteInt16(_formatCodeListLength);
_paramIndex = 0;
_state = State.ParameterFormatCodes;
goto case State.ParameterFormatCodes;
case State.ParameterFormatCodes:
// 0 length implicitly means all-text, 1 means all-binary, >1 means mix-and-match
if (_formatCodeListLength == 1)
{
if (buf.WriteSpaceLeft < 2)
{
return(false);
}
buf.WriteInt16((short)FormatCode.Binary);
}
else if (_formatCodeListLength > 1)
{
for (; _paramIndex < InputParameters.Count; _paramIndex++)
{
if (buf.WriteSpaceLeft < 2)
{
return(false);
}
buf.WriteInt16((short)InputParameters[_paramIndex].FormatCode);
}
}
if (buf.WriteSpaceLeft < 2)
{
return(false);
}
buf.WriteInt16(InputParameters.Count);
_paramIndex = 0;
_state = State.ParameterValues;
goto case State.ParameterValues;
case State.ParameterValues:
if (!WriteParameters(buf, ref directBuf))
{
return(false);
}
_state = State.ResultFormatCodes;
goto case State.ResultFormatCodes;
case State.ResultFormatCodes:
if (UnknownResultTypeList != null)
{
if (buf.WriteSpaceLeft < 2 + UnknownResultTypeList.Length * 2)
{
return(false);
}
buf.WriteInt16(UnknownResultTypeList.Length);
foreach (var t in UnknownResultTypeList)
{
buf.WriteInt16(t ? 0 : 1);
}
}
else
{
if (buf.WriteSpaceLeft < 4)
{
return(false);
}
buf.WriteInt16(1);
buf.WriteInt16(AllResultTypesAreUnknown ? 0 : 1);
}
_state = State.Done;
return(true);
default:
throw PGUtil.ThrowIfReached();
}
}
