internal override bool Write(WriteBuffer buf)
{
if (_charPos == -1)
{
// Start new query
if (buf.WriteSpaceLeft < 1 + 4)
return false;
_charPos = 0;
var queryByteLen = PGUtil.UTF8Encoding.GetByteCount(_query);
_queryChars = _query.ToCharArray();
buf.WriteByte(Code);
buf.WriteInt32(4 + // Message length (including self excluding code)
queryByteLen + // Query byte length
1); // Null terminator
}
if (_charPos < _queryChars.Length)
{
int charsUsed;
bool completed;
buf.WriteStringChunked(_queryChars, _charPos, _queryChars.Length - _charPos, true,
out charsUsed, out completed);
_charPos += charsUsed;
if (!completed)
return false;
}
if (buf.WriteSpaceLeft < 1)
return false;
buf.WriteByte(0);
_charPos = -1;
return true;
}
internal override void WriteFully(WriteBuffer buf)
{
Contract.Requires(Name != null && Name.All(c => c < 128));
buf.WriteByte(Code);
buf.WriteInt32(Length - 1);
buf.WriteByte((byte)StatementOrPortal);
buf.WriteBytesNullTerminated(Encoding.ASCII.GetBytes(Name));
}
internal override void WriteFully(WriteBuffer buf)
{
buf.WriteByte(Code);
buf.WriteInt32(Length - 1);
if (_errorMessageLen == 0)
{
buf.WriteByte(0);
}
else
{
buf.WriteBytesNullTerminated(PGUtil.UTF8Encoding.GetBytes(_errorMessage));
}
}
internal Task WriteClose(StatementOrPortal type, string name, bool async, CancellationToken cancellationToken = default)
{
var len = sizeof(byte) + // Message code
sizeof(int) + // Length
sizeof(byte) + // Statement or portal
name.Length + sizeof(byte); // Statement or portal name plus null terminator
if (WriteBuffer.WriteSpaceLeft < 10)
{
return(FlushAndWrite(len, type, name, async, cancellationToken));
}
Write(len, type, name);
return(Task.CompletedTask);
async Task FlushAndWrite(int len, StatementOrPortal type, string name, bool async, CancellationToken cancellationToken)
{
await Flush(async, cancellationToken);
Debug.Assert(len <= WriteBuffer.WriteSpaceLeft, $"Message of type {GetType().Name} has length {len} which is bigger than the buffer ({WriteBuffer.WriteSpaceLeft})");
Write(len, type, name);
}
void Write(int len, StatementOrPortal type, string name)
{
WriteBuffer.WriteByte(FrontendMessageCode.Close);
WriteBuffer.WriteInt32(len - 1);
WriteBuffer.WriteByte((byte)type);
WriteBuffer.WriteNullTerminatedString(name);
}
}
internal Task WriteSync(bool async, CancellationToken cancellationToken = default)
{
const int len = sizeof(byte) + // Message code
sizeof(int); // Length
if (WriteBuffer.WriteSpaceLeft < len)
{
return(FlushAndWrite(async, cancellationToken));
}
Write();
return(Task.CompletedTask);
async Task FlushAndWrite(bool async, CancellationToken cancellationToken)
{
await Flush(async, cancellationToken);
Debug.Assert(len <= WriteBuffer.WriteSpaceLeft, $"Message of type {GetType().Name} has length {len} which is bigger than the buffer ({WriteBuffer.WriteSpaceLeft})");
Write();
}
void Write()
{
WriteBuffer.WriteByte(FrontendMessageCode.Sync);
WriteBuffer.WriteInt32(len - 1);
}
}
internal async Task WriteSASLInitialResponse(string mechanism, byte[] initialResponse, bool async, CancellationToken cancellationToken = default)
{
var len = sizeof(byte) + // Message code
sizeof(int) + // Length
PGUtil.UTF8Encoding.GetByteCount(mechanism) + sizeof(byte) + // Mechanism plus null terminator
sizeof(int) + // Initial response length
(initialResponse?.Length ?? 0); // Initial response payload
if (WriteBuffer.WriteSpaceLeft < len)
{
await WriteBuffer.Flush(async, cancellationToken);
}
WriteBuffer.WriteByte(FrontendMessageCode.Password);
WriteBuffer.WriteInt32(len - 1);
WriteBuffer.WriteString(mechanism);
WriteBuffer.WriteByte(0); // null terminator
if (initialResponse == null)
{
WriteBuffer.WriteInt32(-1);
}
else
{
WriteBuffer.WriteInt32(initialResponse.Length);
WriteBuffer.WriteBytes(initialResponse);
}
}
public override bool Write(ref DirectBuffer directBuf)
{
if (_lexemePos == -1)
{
if (_writeBuf.WriteSpaceLeft < 4)
{
return(false);
}
_writeBuf.WriteInt32(_value.Count);
_lexemePos = 0;
}
for (; _lexemePos < _value.Count; _lexemePos++)
{
if (_writeBuf.WriteSpaceLeft < MaxSingleLexemeBytes)
{
return(false);
}
_writeBuf.WriteString(_value[_lexemePos].Text);
_writeBuf.WriteByte(0);
_writeBuf.WriteInt16(_value[_lexemePos].Count);
for (var i = 0; i < _value[_lexemePos].Count; i++)
{
_writeBuf.WriteInt16(_value[_lexemePos][i]._val);
}
}
return(true);
}
internal Task WriteExecute(int maxRows, bool async, CancellationToken cancellationToken = default)
{
// Note: non-empty portal currently not supported
const int len = sizeof(byte) + // Message code
sizeof(int) + // Length
sizeof(byte) + // Null-terminated portal name (always empty for now)
sizeof(int); // Max number of rows
if (WriteBuffer.WriteSpaceLeft < len)
{
return(FlushAndWrite(maxRows, async, cancellationToken));
}
Write(maxRows);
return(Task.CompletedTask);
async Task FlushAndWrite(int maxRows, bool async, CancellationToken cancellationToken)
{
await Flush(async, cancellationToken);
Debug.Assert(10 <= WriteBuffer.WriteSpaceLeft, $"Message of type {GetType().Name} has length 10 which is bigger than the buffer ({WriteBuffer.WriteSpaceLeft})");
Write(maxRows);
}
void Write(int maxRows)
{
WriteBuffer.WriteByte(FrontendMessageCode.Execute);
WriteBuffer.WriteInt32(len - 1);
WriteBuffer.WriteByte(0); // Portal is always empty for now
WriteBuffer.WriteInt32(maxRows);
}
}
internal void WriteStartup(Dictionary <string, string> parameters)
{
var len = sizeof(int) + // Length
sizeof(int) + // Protocol version
sizeof(byte); // Trailing zero byte
foreach (var kvp in parameters)
{
len += PGUtil.UTF8Encoding.GetByteCount(kvp.Key) + 1 +
PGUtil.UTF8Encoding.GetByteCount(kvp.Value) + 1;
}
// Should really never happen, just in case
if (len > WriteBuffer.Size)
{
throw new Exception("Startup message bigger than buffer");
}
WriteBuffer.WriteInt32(len);
WriteBuffer.WriteInt16(ProtocolVersion.MAJOR);
WriteBuffer.WriteInt16(ProtocolVersion.MINOR);
foreach (var kv in parameters)
{
WriteBuffer.WriteString(kv.Key);
WriteBuffer.WriteByte(0);
WriteBuffer.WriteString(kv.Value);
WriteBuffer.WriteByte(0);
}
WriteBuffer.WriteByte(0);
}
protected override async Task Write(object value, WriteBuffer buf, LengthCache lengthCache, NpgsqlParameter parameter,
bool async, CancellationToken cancellationToken)
{
var vector = (NpgsqlTsVector)value;
if (buf.WriteSpaceLeft < 4)
{
await buf.Flush(async, cancellationToken);
}
buf.WriteInt32(vector.Count);
foreach (NpgsqlTsVector.Lexeme lexeme in vector)
{
if (buf.WriteSpaceLeft < MaxSingleLexemeBytes)
{
await buf.Flush(async, cancellationToken);
}
buf.WriteString(lexeme.Text);
buf.WriteByte(0);
buf.WriteInt16(lexeme.Count);
for (var i = 0; i < lexeme.Count; i++)
{
buf.WriteInt16(lexeme[i].Value);
}
}
}
public override void Write(object value, WriteBuffer buf, NpgsqlParameter parameter)
{
if (parameter?.ConvertedValue != null)
{
value = parameter.ConvertedValue;
}
buf.WriteByte(((bool)value) ? (byte)1 : (byte)0);
}
internal override void WriteFully(WriteBuffer buf)
{
buf.WriteByte(Code);
buf.WriteInt32(Length - 1);
buf.WriteString(_mechanism);
buf.WriteByte(0); // null terminator
if (_initialResponse == null)
{
buf.WriteInt32(-1);
}
else
{
buf.WriteInt32(_initialResponse.Length);
buf.WriteBytes(_initialResponse);
}
}
async Task WriteBool(bool b, WriteBuffer buf, bool async, CancellationToken cancellationToken)
{
if (buf.WriteSpaceLeft < 5)
{
await buf.Flush(async, cancellationToken);
}
buf.WriteInt32(1);
buf.WriteByte(b ? (byte)0x80 : (byte)0);
}
protected override async Task Write(object value, WriteBuffer buf, LengthCache lengthCache, NpgsqlParameter parameter,
bool async, CancellationToken cancellationToken)
{
if (buf.WriteSpaceLeft < 1)
{
await buf.Flush(async, cancellationToken);
}
buf.WriteByte(JsonbProtocolVersion);
await base.Write(value, buf, lengthCache, parameter, async, cancellationToken);
}
internal override async Task Write(WriteBuffer buf, bool async, CancellationToken cancellationToken)
{
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, cancellationToken);
}
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, cancellationToken);
if (buf.WriteSpaceLeft < 1 + 2)
{
await buf.Flush(async, cancellationToken);
}
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, cancellationToken);
}
buf.WriteInt32((int)t);
}
}
internal override void WriteFully(WriteBuffer buf)
{
Contract.Requires(Portal != null && Portal.All(c => c < 128));
var portalNameBytes = Portal == "" ? PGUtil.EmptyBuffer : Encoding.ASCII.GetBytes(Portal);
buf.WriteByte(Code);
buf.WriteInt32(Length - 1);
buf.WriteBytesNullTerminated(portalNameBytes);
buf.WriteInt32(MaxRows);
}
internal override void WriteFully(WriteBuffer buf)
{
Contract.Requires(Portal != null && Portal.All(c => c < 128));
var portalNameBytes = Portal == "" ? PGUtil.EmptyBuffer : Encoding.ASCII.GetBytes(Portal);
buf.WriteByte(Code);
buf.WriteInt32(Length - 1);
buf.WriteBytesNullTerminated(portalNameBytes);
buf.WriteInt32(MaxRows);
}
internal async Task WriteParse(string sql, string statementName, List <NpgsqlParameter> inputParameters, bool async, CancellationToken cancellationToken = default)
{
Debug.Assert(statementName.All(c => c < 128));
int queryByteLen;
try
{
queryByteLen = TextEncoding.GetByteCount(sql);
}
catch (Exception e)
{
Break(e);
throw;
}
if (WriteBuffer.WriteSpaceLeft < 1 + 4 + statementName.Length + 1)
{
await Flush(async, cancellationToken);
}
var messageLength =
sizeof(byte) + // Message code
sizeof(int) + // Length
statementName.Length + // Statement name
sizeof(byte) + // Null terminator for the statement name
queryByteLen + sizeof(byte) + // SQL query length plus null terminator
sizeof(ushort) + // Number of parameters
inputParameters.Count * sizeof(int); // Parameter OIDs
WriteBuffer.WriteByte(FrontendMessageCode.Parse);
WriteBuffer.WriteInt32(messageLength - 1);
WriteBuffer.WriteNullTerminatedString(statementName);
await WriteBuffer.WriteString(sql, queryByteLen, async, cancellationToken);
if (WriteBuffer.WriteSpaceLeft < 1 + 2)
{
await Flush(async, cancellationToken);
}
WriteBuffer.WriteByte(0); // Null terminator for the query
WriteBuffer.WriteUInt16((ushort)inputParameters.Count);
foreach (var p in inputParameters)
{
if (WriteBuffer.WriteSpaceLeft < 4)
{
await Flush(async, cancellationToken);
}
WriteBuffer.WriteInt32((int)p.Handler !.PostgresType.OID);
}
}
internal override async Task Write(WriteBuffer buf, bool async, CancellationToken cancellationToken)
{
if (buf.WriteSpaceLeft < 1 + 4)
{
await buf.Flush(async, cancellationToken);
}
var queryByteLen = _encoding.GetByteCount(_query);
buf.WriteByte(Code);
buf.WriteInt32(4 + // Message length (including self excluding code)
queryByteLen + // Query byte length
1); // Null terminator
await buf.WriteString(_query, queryByteLen, async, cancellationToken);
if (buf.WriteSpaceLeft < 1)
{
await buf.Flush(async, cancellationToken);
}
buf.WriteByte(0);
}
internal override bool Write(WriteBuffer buf)
{
if (_charPos == -1)
{
// Start new query
if (buf.WriteSpaceLeft < 1 + 4)
{
return(false);
}
_charPos = 0;
var queryByteLen = _encoding.GetByteCount(_query);
_queryChars = _query.ToCharArray();
buf.WriteByte(Code);
buf.WriteInt32(4 + // Message length (including self excluding code)
queryByteLen + // Query byte length
1); // Null terminator
}
if (_charPos < _queryChars.Length)
{
int charsUsed;
bool completed;
buf.WriteStringChunked(_queryChars, _charPos, _queryChars.Length - _charPos, true,
out charsUsed, out completed);
_charPos += charsUsed;
if (!completed)
{
return(false);
}
}
if (buf.WriteSpaceLeft < 1)
{
return(false);
}
buf.WriteByte(0);
_charPos = -1;
return(true);
}
internal override void WriteFully(WriteBuffer buf)
{
buf.WriteInt32(_length);
buf.WriteInt32(ProtocolVersion3);
foreach (var kv in _parameters)
{
buf.WriteBytesNullTerminated(kv.Key);
buf.WriteBytesNullTerminated(kv.Value);
}
buf.WriteByte(0);
}
internal async Task WriteCopyDone(bool async, CancellationToken cancellationToken = default)
{
const int len = sizeof(byte) + // Message code
sizeof(int); // Length
if (WriteBuffer.WriteSpaceLeft < len)
{
await Flush(async, cancellationToken);
}
WriteBuffer.WriteByte(FrontendMessageCode.CopyDone);
WriteBuffer.WriteInt32(len - 1);
}
internal override void WriteFully(WriteBuffer buf)
{
buf.WriteInt32(_length);
buf.WriteInt32(ProtocolVersion3);
foreach (var kv in _parameters)
{
buf.WriteBytesNullTerminated(kv.Key);
buf.WriteBytesNullTerminated(kv.Value);
}
buf.WriteByte(0);
}
internal void WriteTerminate()
{
const int len = sizeof(byte) + // Message code
sizeof(int); // Length
if (WriteBuffer.WriteSpaceLeft < len)
{
Flush(false).GetAwaiter().GetResult();
}
WriteBuffer.WriteByte(FrontendMessageCode.Terminate);
WriteBuffer.WriteInt32(len - 1);
}
public override bool Write(ref DirectBuffer directBuf)
{
switch (_state)
{
case State.Flags:
if (_writeBuf.WriteSpaceLeft < 1)
{
return(false);
}
_writeBuf.WriteByte((byte)_value.Flags);
if (_value.IsEmpty)
{
CleanupState();
return(true);
}
goto case State.LowerBound;
case State.LowerBound:
_state = State.LowerBound;
if (_value.LowerBoundInfinite)
{
goto case State.UpperBound;
}
if (!WriteSingleElement(_value.LowerBound, ref directBuf))
{
return(false);
}
goto case State.UpperBound;
case State.UpperBound:
_state = State.UpperBound;
if (_value.UpperBoundInfinite)
{
CleanupState();
return(true);
}
if (!WriteSingleElement(_value.UpperBound, ref directBuf))
{
return(false);
}
CleanupState();
return(true);
default:
throw PGUtil.ThrowIfReached();
}
}
internal async Task WriteCopyFail(bool async, CancellationToken cancellationToken = default)
{
// Note: error message not supported for now
const int len = sizeof(byte) + // Message code
sizeof(int) + // Length
sizeof(byte); // Error message is always empty (only a null terminator)
if (WriteBuffer.WriteSpaceLeft < len)
{
await Flush(async, cancellationToken);
}
WriteBuffer.WriteByte(FrontendMessageCode.CopyFail);
WriteBuffer.WriteInt32(len - 1);
WriteBuffer.WriteByte(0); // Error message is always empty (only a null terminator)
}
public override bool Write(ref DirectBuffer directBuf)
{
if (!_handledVersion)
{
if (_writeBuf.WriteSpaceLeft < 1)
{
return(false);
}
_writeBuf.WriteByte(JsonbProtocolVersion);
_handledVersion = true;
}
if (!_textHandler.Write(ref directBuf))
{
return(false);
}
_writeBuf = null;
return(true);
}
internal override async Task Write(WriteBuffer buf, bool async, CancellationToken cancellationToken)
{
if (buf.WriteSpaceLeft < 1 + 5)
{
await buf.Flush(async);
}
buf.WriteByte(Code);
buf.WriteInt32(4 + PayloadLength);
if (PayloadLength <= buf.WriteSpaceLeft)
{
// The entire array fits in our buffer, copy it into the buffer as usual.
buf.WriteBytes(Payload, PayloadOffset, Payload.Length);
return;
}
await buf.Flush(async);
buf.DirectWrite(Payload, PayloadOffset, PayloadLength);
}
internal async Task WritePassword(byte[] payload, int offset, int count, bool async, CancellationToken cancellationToken = default)
{
if (WriteBuffer.WriteSpaceLeft < sizeof(byte) + sizeof(int))
{
await WriteBuffer.Flush(async, cancellationToken);
}
WriteBuffer.WriteByte(FrontendMessageCode.Password);
WriteBuffer.WriteInt32(sizeof(int) + count);
if (count <= WriteBuffer.WriteSpaceLeft)
{
// The entire array fits in our WriteBuffer, copy it into the WriteBuffer as usual.
WriteBuffer.WriteBytes(payload, offset, count);
return;
}
await WriteBuffer.Flush(async, cancellationToken);
await WriteBuffer.DirectWrite(new ReadOnlyMemory <byte>(payload, offset, count), async, cancellationToken);
}
protected override async Task Write(object value, WriteBuffer buf, LengthCache lengthCache, NpgsqlParameter parameter,
bool async, CancellationToken cancellationToken)
{
var path = (NpgsqlPath)value;
if (buf.WriteSpaceLeft < 5)
{
await buf.Flush(async, cancellationToken);
}
buf.WriteByte((byte)(path.Open ? 0 : 1));
buf.WriteInt32(path.Count);
foreach (var p in path)
{
if (buf.WriteSpaceLeft < 16)
{
await buf.Flush(async, cancellationToken);
}
buf.WriteDouble(p.X);
buf.WriteDouble(p.Y);
}
}
protected override async Task Write(object value, WriteBuffer buf, LengthCache lengthCache, NpgsqlParameter parameter,
bool async, CancellationToken cancellationToken)
{
var range = (NpgsqlRange <TElement>)value;
if (buf.WriteSpaceLeft < 1)
{
await buf.Flush(async, cancellationToken);
}
buf.WriteByte((byte)range.Flags);
if (range.IsEmpty)
{
return;
}
if (!range.LowerBoundInfinite)
{
await ElementHandler.WriteWithLength(range.LowerBound, buf, lengthCache, null, async, cancellationToken);
}
if (!range.UpperBoundInfinite)
{
await ElementHandler.WriteWithLength(range.UpperBound, buf, lengthCache, null, async, cancellationToken);
}
}
internal async Task WriteQuery(string sql, bool async, CancellationToken cancellationToken = default)
{
var queryByteLen = TextEncoding.GetByteCount(sql);
if (WriteBuffer.WriteSpaceLeft < 1 + 4)
{
await Flush(async, cancellationToken);
}
WriteBuffer.WriteByte(FrontendMessageCode.Query);
WriteBuffer.WriteInt32(
sizeof(int) + // Message length (including self excluding code)
queryByteLen + // Query byte length
sizeof(byte)); // Null terminator
await WriteBuffer.WriteString(sql, queryByteLen, async, cancellationToken);
if (WriteBuffer.WriteSpaceLeft < 1)
{
await Flush(async, cancellationToken);
}
WriteBuffer.WriteByte(0); // Null terminator
}
internal override void WriteFully(WriteBuffer buf)
{
buf.WriteByte(Code);
buf.WriteInt32(4);
}
internal override void WriteFully(WriteBuffer buf)
{
buf.WriteByte(Code);
buf.WriteInt32(Length - 1);
buf.WriteBytes(Password, 0, Password.Length);
}
internal async Task WriteBind(
List <NpgsqlParameter> parameters,
string portal,
string statement,
bool allResultTypesAreUnknown,
bool[]?unknownResultTypeList,
bool async,
CancellationToken cancellationToken = default)
{
Debug.Assert(statement.All(c => c < 128));
Debug.Assert(portal.All(c => c < 128));
var headerLength =
sizeof(byte) + // Message code
sizeof(int) + // Message length
sizeof(byte) + // Portal is always empty (only a null terminator)
statement.Length + sizeof(byte) + // Statement name plus null terminator
sizeof(ushort); // Number of parameter format codes that follow
if (WriteBuffer.WriteSpaceLeft < headerLength)
{
Debug.Assert(WriteBuffer.Size >= headerLength, "Write buffer too small for Bind header");
await Flush(async, cancellationToken);
}
var formatCodesSum = 0;
var paramsLength = 0;
for (var paramIndex = 0; paramIndex < parameters.Count; paramIndex++)
{
var param = parameters[paramIndex];
formatCodesSum += (int)param.FormatCode;
param.LengthCache?.Rewind();
paramsLength += param.ValidateAndGetLength();
}
var formatCodeListLength = formatCodesSum == 0 ? 0 : formatCodesSum == parameters.Count ? 1 : parameters.Count;
var messageLength = headerLength +
sizeof(short) * formatCodeListLength + // List of format codes
sizeof(short) + // Number of parameters
sizeof(int) * parameters.Count + // Parameter lengths
paramsLength + // Parameter values
sizeof(short) + // Number of result format codes
sizeof(short) * (unknownResultTypeList?.Length ?? 1); // Result format codes
WriteBuffer.WriteByte(FrontendMessageCode.Bind);
WriteBuffer.WriteInt32(messageLength - 1);
Debug.Assert(portal == string.Empty);
WriteBuffer.WriteByte(0); // Portal is always empty
WriteBuffer.WriteNullTerminatedString(statement);
WriteBuffer.WriteInt16(formatCodeListLength);
// 0 length implicitly means all-text, 1 means all-binary, >1 means mix-and-match
if (formatCodeListLength == 1)
{
if (WriteBuffer.WriteSpaceLeft < 2)
{
await Flush(async, cancellationToken);
}
WriteBuffer.WriteInt16((short)FormatCode.Binary);
}
else if (formatCodeListLength > 1)
{
for (var paramIndex = 0; paramIndex < parameters.Count; paramIndex++)
{
if (WriteBuffer.WriteSpaceLeft < 2)
{
await Flush(async, cancellationToken);
}
WriteBuffer.WriteInt16((short)parameters[paramIndex].FormatCode);
}
}
if (WriteBuffer.WriteSpaceLeft < 2)
{
await Flush(async, cancellationToken);
}
WriteBuffer.WriteUInt16((ushort)parameters.Count);
for (var paramIndex = 0; paramIndex < parameters.Count; paramIndex++)
{
var param = parameters[paramIndex];
param.LengthCache?.Rewind();
await param.WriteWithLength(WriteBuffer, async, cancellationToken);
}
if (unknownResultTypeList != null)
{
if (WriteBuffer.WriteSpaceLeft < 2 + unknownResultTypeList.Length * 2)
{
await Flush(async, cancellationToken);
}
WriteBuffer.WriteInt16(unknownResultTypeList.Length);
foreach (var t in unknownResultTypeList)
{
WriteBuffer.WriteInt16(t ? 0 : 1);
}
}
else
{
if (WriteBuffer.WriteSpaceLeft < 4)
{
await Flush(async, cancellationToken);
}
WriteBuffer.WriteInt16(1);
WriteBuffer.WriteInt16(allResultTypesAreUnknown ? 0 : 1);
}
}
bool Write(PostgisGeometry geom)
{
if (_newGeom & _icol.Count == 0)
{
if (geom.SRID == 0)
{
if (_writeBuf.WriteSpaceLeft < 5)
{
return(false);
}
_writeBuf.WriteByte(0); // We choose to ouput only XDR structure
_writeBuf.WriteInt32((int)geom.Identifier);
}
else
{
if (_writeBuf.WriteSpaceLeft < 9)
{
return(false);
}
_writeBuf.WriteByte(0);
_writeBuf.WriteInt32((int)((uint)geom.Identifier | (uint)EwkbModifier.HasSRID));
_writeBuf.WriteInt32((int)geom.SRID);
}
_newGeom = false;
}
switch (geom.Identifier)
{
case WkbIdentifier.Point:
if (_writeBuf.WriteSpaceLeft < 16)
{
return(false);
}
var p = (PostgisPoint)geom;
_writeBuf.WriteDouble(p.X);
_writeBuf.WriteDouble(p.Y);
return(true);
case WkbIdentifier.LineString:
var l = (PostgisLineString)geom;
if (_ipts == -1)
{
if (_writeBuf.WriteSpaceLeft < 4)
{
return(false);
}
_writeBuf.WriteInt32(l.PointCount);
_ipts = 0;
}
for (; _ipts < l.PointCount; _ipts++)
{
if (_writeBuf.WriteSpaceLeft < 16)
{
return(false);
}
_writeBuf.WriteDouble(l[_ipts].X);
_writeBuf.WriteDouble(l[_ipts].Y);
}
return(true);
case WkbIdentifier.Polygon:
var pol = (PostgisPolygon)geom;
if (_irng == -1)
{
if (_writeBuf.WriteSpaceLeft < 4)
{
return(false);
}
_writeBuf.WriteInt32(pol.RingCount);
_irng = 0;
}
for (; _irng < pol.RingCount; _irng++)
{
if (_ipts == -1)
{
if (_writeBuf.WriteSpaceLeft < 4)
{
return(false);
}
_writeBuf.WriteInt32(pol[_irng].Length);
_ipts = 0;
}
for (; _ipts < pol[_irng].Length; _ipts++)
{
if (_writeBuf.WriteSpaceLeft < 16)
{
return(false);
}
_writeBuf.WriteDouble(pol[_irng][_ipts].X);
_writeBuf.WriteDouble(pol[_irng][_ipts].Y);
}
_ipts = -1;
}
return(true);
case WkbIdentifier.MultiPoint:
var mp = (PostgisMultiPoint)geom;
if (_ipts == -1)
{
if (_writeBuf.WriteSpaceLeft < 4)
{
return(false);
}
_writeBuf.WriteInt32(mp.PointCount);
_ipts = 0;
}
for (; _ipts < mp.PointCount; _ipts++)
{
if (_writeBuf.WriteSpaceLeft < 21)
{
return(false);
}
_writeBuf.WriteByte(0);
_writeBuf.WriteInt32((int)WkbIdentifier.Point);
_writeBuf.WriteDouble(mp[_ipts].X);
_writeBuf.WriteDouble(mp[_ipts].Y);
}
return(true);
case WkbIdentifier.MultiLineString:
var ml = (PostgisMultiLineString)geom;
if (_irng == -1)
{
if (_writeBuf.WriteSpaceLeft < 4)
{
return(false);
}
_writeBuf.WriteInt32(ml.LineCount);
_irng = 0;
}
for (; _irng < ml.LineCount; _irng++)
{
if (_ipts == -1)
{
if (_writeBuf.WriteSpaceLeft < 9)
{
return(false);
}
_writeBuf.WriteByte(0);
_writeBuf.WriteInt32((int)WkbIdentifier.LineString);
_writeBuf.WriteInt32(ml[_irng].PointCount);
_ipts = 0;
}
for (; _ipts < ml[_irng].PointCount; _ipts++)
{
if (_writeBuf.WriteSpaceLeft < 16)
{
return(false);
}
_writeBuf.WriteDouble(ml[_irng][_ipts].X);
_writeBuf.WriteDouble(ml[_irng][_ipts].Y);
}
_ipts = -1;
}
return(true);
case WkbIdentifier.MultiPolygon:
var mpl = (PostgisMultiPolygon)geom;
if (_ipol == -1)
{
if (_writeBuf.WriteSpaceLeft < 4)
{
return(false);
}
_writeBuf.WriteInt32(mpl.PolygonCount);
_ipol = 0;
}
for (; _ipol < mpl.PolygonCount; _ipol++)
{
if (_irng == -1)
{
if (_writeBuf.WriteSpaceLeft < 9)
{
return(false);
}
_writeBuf.WriteByte(0);
_writeBuf.WriteInt32((int)WkbIdentifier.Polygon);
_writeBuf.WriteInt32(mpl[_ipol].RingCount);
_irng = 0;
}
for (; _irng < mpl[_ipol].RingCount; _irng++)
{
if (_ipts == -1)
{
if (_writeBuf.WriteSpaceLeft < 4)
{
return(false);
}
_writeBuf.WriteInt32(mpl[_ipol][_irng].Length);
_ipts = 0;
}
for (; _ipts < mpl[_ipol][_irng].Length; _ipts++)
{
if (_writeBuf.WriteSpaceLeft < 16)
{
return(false);
}
_writeBuf.WriteDouble(mpl[_ipol][_irng][_ipts].X);
_writeBuf.WriteDouble(mpl[_ipol][_irng][_ipts].Y);
}
_ipts = -1;
}
_irng = -1;
}
_ipol = -1;
return(true);
case WkbIdentifier.GeometryCollection:
var coll = (PostgisGeometryCollection)geom;
if (_icol.Count == 0)
{
if (_writeBuf.WriteSpaceLeft < 4)
{
return(false);
}
_writeBuf.WriteInt32(coll.GeometryCount);
_newGeom = true;
}
for (var i = _icol.Count > 0 ? _icol.Pop() : 0; i < coll.GeometryCount; i++)
{
if (!Write(coll[i]))
{
_icol.Push(i);
return(false);
}
Reset();
}
return(true);
default:
throw new InvalidOperationException("Unknown Postgis identifier.");
}
}
internal override void WriteFully(WriteBuffer buf)
{
buf.WriteByte((byte)BackendMessageCode.CopyDone);
buf.WriteInt32(4);
}
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);
}
_state = State.ParameterCount;
goto case State.ParameterCount;
case State.ParameterCount:
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();
}
}
internal override void WriteFully(WriteBuffer buf)
{
buf.WriteByte(Code);
buf.WriteInt32(4);
}
internal override bool Write(WriteBuffer buf)
{
Contract.Requires(Statement != null);
switch (_state)
{
case State.WroteNothing:
_statementNameBytes = Statement.Length == 0 ? PGUtil.EmptyBuffer : _encoding.GetBytes(Statement);
_queryLen = _encoding.GetByteCount(Query);
if (buf.WriteSpaceLeft < 1 + 4 + _statementNameBytes.Length + 1) {
return false;
}
var messageLength =
1 + // Message code
4 + // Length
_statementNameBytes.Length +
1 + // Null terminator
_queryLen +
1 + // Null terminator
2 + // Number of parameters
ParameterTypeOIDs.Count * 4;
buf.WriteByte(Code);
buf.WriteInt32(messageLength - 1);
buf.WriteBytesNullTerminated(_statementNameBytes);
goto case State.WroteHeader;
case State.WroteHeader:
_state = State.WroteHeader;
if (_queryLen <= buf.WriteSpaceLeft) {
buf.WriteString(Query);
goto case State.WroteQuery;
}
if (_queryLen <= buf.Size) {
// String can fit entirely in an empty buffer. Flush and retry rather than
// going into the partial writing flow below (which requires ToCharArray())
return false;
}
_queryChars = Query.ToCharArray();
_charPos = 0;
goto case State.WritingQuery;
case State.WritingQuery:
_state = State.WritingQuery;
int charsUsed;
bool completed;
buf.WriteStringChunked(_queryChars, _charPos, _queryChars.Length - _charPos, true,
out charsUsed, out completed);
if (!completed)
{
_charPos += charsUsed;
return false;
}
goto case State.WroteQuery;
case State.WroteQuery:
_state = State.WroteQuery;
if (buf.WriteSpaceLeft < 1 + 2) {
return false;
}
buf.WriteByte(0); // Null terminator for the query
buf.WriteInt16((short)ParameterTypeOIDs.Count);
goto case State.WritingParameterTypes;
case State.WritingParameterTypes:
_state = State.WritingParameterTypes;
for (; _parameterTypePos < ParameterTypeOIDs.Count; _parameterTypePos++)
{
if (buf.WriteSpaceLeft < 4)
{
return false;
}
buf.WriteInt32((int)ParameterTypeOIDs[_parameterTypePos]);
}
_state = State.WroteAll;
return true;
default:
throw PGUtil.ThrowIfReached();
}
}
