public NpgsqlDate AddYears(int years)
{
switch (_type)
{
case InternalType.Infinity:
return(Infinity);
case InternalType.NegativeInfinity:
return(NegativeInfinity);
case InternalType.Finite:
break;
default:
throw PGUtil.ThrowIfReached();
}
int newYear = Year + years;
if (newYear >= 0 && _daysSinceEra < 0) //cross 1CE/1BCE divide going up
{
++newYear;
}
else if (newYear <= 0 && _daysSinceEra >= 0) //cross 1CE/1BCE divide going down
{
--newYear;
}
return(new NpgsqlDate(newYear, Month, Day));
}
public void PrepareWrite(object value, NpgsqlBuffer buf, LengthCache lengthCache, NpgsqlParameter parameter = null)
{
_buf = buf;
_charPos = -1;
_byteLen = lengthCache.GetLast();
_str = value as string;
if (_str != null)
{
_charLen = parameter == null || parameter.Size <= 0 || parameter.Size >= _str.Length ? _str.Length : parameter.Size;
return;
}
_chars = value as char[];
if (_chars != null)
{
_charLen = parameter == null || parameter.Size <= 0 || parameter.Size >= _chars.Length ? _chars.Length : parameter.Size;
return;
}
if (value is char)
{
_singleCharArray[0] = (char)value;
_chars = _singleCharArray;
_charLen = 1;
return;
}
throw PGUtil.ThrowIfReached();
}
public NpgsqlDate AddMonths(int months)
{
switch (_type)
{
case InternalType.Infinity:
return(Infinity);
case InternalType.NegativeInfinity:
return(NegativeInfinity);
case InternalType.Finite:
break;
default:
throw PGUtil.ThrowIfReached();
}
int newYear = Year;
int newMonth = Month + months;
while (newMonth > 12)
{
newMonth -= 12;
newYear += 1;
}
while (newMonth < 1)
{
newMonth += 12;
newYear -= 1;
}
var maxDay = (IsLeap(newYear) ? LeapYearMaxes : CommonYearMaxes)[newMonth - 1];
var newDay = Day > maxDay ? maxDay : Day;
return(new NpgsqlDate(newYear, newMonth, newDay));
}
bool ReadSingleElement <TElement>(out TElement element)
{
try
{
if (_elementLen == -1)
{
if (_buf.ReadBytesLeft < 4)
{
element = default(TElement);
return(false);
}
_elementLen = _buf.ReadInt32();
if (_elementLen == -1)
{
// TODO: Nullables
element = default(TElement);
return(true);
}
}
var asSimpleReader = ElementHandler as ISimpleTypeReader <TElement>;
if (asSimpleReader != null)
{
if (_buf.ReadBytesLeft < _elementLen)
{
element = default(TElement);
return(false);
}
element = asSimpleReader.Read(_buf, _elementLen, _fieldDescription);
_elementLen = -1;
return(true);
}
var asChunkingReader = ElementHandler as IChunkingTypeReader <TElement>;
if (asChunkingReader != null)
{
if (!_preparedRead)
{
asChunkingReader.PrepareRead(_buf, _elementLen, _fieldDescription);
_preparedRead = true;
}
if (!asChunkingReader.Read(out element))
{
return(false);
}
_elementLen = -1;
_preparedRead = false;
return(true);
}
throw PGUtil.ThrowIfReached();
}
catch (SafeReadException e)
{
// TODO: Implement safe reading for array: read all values to the end, only then raise the
// SafeReadException. For now, translate the safe exception to an unsafe one to break the connector.
throw e.InnerException;
}
}
public override bool Write(ref DirectBuffer directBuf)
{
if (_fieldIndex == -1)
{
if (_writeBuf.WriteSpaceLeft < 4)
{
return(false);
}
_writeBuf.WriteInt32(_members.Count);
_fieldIndex = 0;
}
for (; _fieldIndex < _members.Count; _fieldIndex++)
{
var fieldDescriptor = _members[_fieldIndex];
var fieldHandler = fieldDescriptor.Handler;
var fieldValue = fieldDescriptor.GetValue(_value);
var asSimpleWriter = fieldHandler as ISimpleTypeHandler;
if (asSimpleWriter != null)
{
var elementLen = asSimpleWriter.ValidateAndGetLength(fieldValue, null);
if (_writeBuf.WriteSpaceLeft < 8 + elementLen)
{
return(false);
}
_writeBuf.WriteUInt32(fieldHandler.BackendType.OID);
_writeBuf.WriteInt32(elementLen);
asSimpleWriter.Write(fieldValue, _writeBuf, null);
continue;
}
var asChunkedWriter = fieldHandler as IChunkingTypeHandler;
if (asChunkedWriter != null)
{
if (!_wroteFieldHeader)
{
if (_writeBuf.WriteSpaceLeft < 8)
{
return(false);
}
_writeBuf.WriteUInt32(fieldHandler.BackendType.OID);
_writeBuf.WriteInt32(asChunkedWriter.ValidateAndGetLength(fieldValue, ref _lengthCache, null));
asChunkedWriter.PrepareWrite(fieldValue, _writeBuf, _lengthCache, null);
_wroteFieldHeader = true;
}
if (!asChunkedWriter.Write(ref directBuf))
{
return(false);
}
_wroteFieldHeader = false;
continue;
}
throw PGUtil.ThrowIfReached();
}
return(true);
}
public override void Write(object value, NpgsqlBuffer buf, NpgsqlParameter parameter)
{
if (parameter != null && parameter.ConvertedValue != null)
{
value = parameter.ConvertedValue;
}
if (value is NpgsqlDateTime)
{
var ts = (NpgsqlDateTime)value;
switch (ts.Kind)
{
case DateTimeKind.Unspecified:
case DateTimeKind.Utc:
break;
case DateTimeKind.Local:
ts = ts.ToUniversalTime();
break;
default:
throw PGUtil.ThrowIfReached();
}
base.Write(ts, buf, parameter);
return;
}
if (value is DateTime)
{
var dt = (DateTime)value;
switch (dt.Kind)
{
case DateTimeKind.Unspecified:
case DateTimeKind.Utc:
break;
case DateTimeKind.Local:
dt = dt.ToUniversalTime();
break;
default:
throw PGUtil.ThrowIfReached();
}
base.Write(dt, buf, parameter);
return;
}
if (value is DateTimeOffset)
{
base.Write(((DateTimeOffset)value).ToUniversalTime(), buf, parameter);
return;
}
throw PGUtil.ThrowIfReached();
}
public virtual void Write(object value, NpgsqlBuffer buf)
{
NpgsqlDateTime ts;
if (value is NpgsqlDateTime)
{
ts = (NpgsqlDateTime)value;
if (!ts.IsFinite)
{
if (ts.IsInfinity)
{
buf.WriteInt64(Int64.MaxValue);
return;
}
if (ts.IsMinusInfinity)
{
buf.WriteInt64(Int64.MinValue);
return;
}
throw PGUtil.ThrowIfReached();
}
}
else if (value is DateTime)
{
ts = new NpgsqlDateTime((DateTime)value);
}
else if (value is DateTimeOffset)
{
ts = new NpgsqlDateTime(((DateTimeOffset)value).DateTime);
}
else if (value is string)
{
// TODO: Decide what to do with this
throw new InvalidOperationException("String DateTimes are not allowed, use DateTime instead.");
}
else
{
throw new InvalidCastException();
}
var uSecsTime = ts.Time.Ticks / 10;
if (ts >= new NpgsqlDateTime(2000, 1, 1, 0, 0, 0))
{
var uSecsDate = (ts.Date.DaysSinceEra - 730119) * 86400000000L;
buf.WriteInt64(uSecsDate + uSecsTime);
}
else
{
var uSecsDate = (730119 - ts.Date.DaysSinceEra) * 86400000000L;
buf.WriteInt64(-(uSecsDate - uSecsTime));
}
}
public void Write(object value, NpgsqlBuffer buf, NpgsqlParameter parameter)
{
if (parameter != null && parameter.ConvertedValue != null)
{
value = parameter.ConvertedValue;
}
NpgsqlDate date;
if (value is NpgsqlDate)
{
date = (NpgsqlDate)value;
}
else if (value is DateTime)
{
var dt = (DateTime)value;
if (_convertInfinityDateTime)
{
if (dt == DateTime.MaxValue)
{
date = NpgsqlDate.Infinity;
}
else if (dt == DateTime.MinValue)
{
date = NpgsqlDate.NegativeInfinity;
}
else
{
date = new NpgsqlDate(dt);
}
}
else
{
date = new NpgsqlDate(dt);
}
}
else
{
throw PGUtil.ThrowIfReached();
}
if (date == NpgsqlDate.NegativeInfinity)
{
buf.WriteInt32(int.MinValue);
}
else if (date == NpgsqlDate.Infinity)
{
buf.WriteInt32(int.MaxValue);
}
else
{
buf.WriteInt32(date.DaysSinceEra - 730119);
}
}
bool WriteSingleElement(object element, out byte[] directBuf)
{
// TODO: Need generic version of this...
directBuf = null;
if (element == null || element is DBNull)
{
if (_buf.WriteSpaceLeft < 4)
{
return(false);
}
_buf.WriteInt32(-1);
return(true);
}
var asSimpleWriter = ElementHandler as ISimpleTypeWriter;
if (asSimpleWriter != null)
{
var elementLen = asSimpleWriter.ValidateAndGetLength(element);
if (_buf.WriteSpaceLeft < 4 + elementLen)
{
return(false);
}
_buf.WriteInt32(elementLen);
asSimpleWriter.Write(element, _buf);
return(true);
}
var asChunkedWriter = ElementHandler as IChunkingTypeWriter;
if (asChunkedWriter != null)
{
if (!_wroteElementLen)
{
if (_buf.WriteSpaceLeft < 4)
{
return(false);
}
_buf.WriteInt32(asChunkedWriter.ValidateAndGetLength(element));
asChunkedWriter.PrepareWrite(_buf, element);
_wroteElementLen = true;
}
if (!asChunkedWriter.Write(ref directBuf))
{
return(false);
}
_wroteElementLen = false;
return(true);
}
throw PGUtil.ThrowIfReached();
}
internal object GetValue(object container)
{
if (_property != null)
{
return(_property.GetValue(container));
}
if (_field != null)
{
return(_field.GetValue(container));
}
throw PGUtil.ThrowIfReached();
}
public override void Write(object value, NpgsqlBuffer buf)
{
if (value is NpgsqlDateTime)
{
var ts = (NpgsqlDateTime)value;
switch (ts.Kind)
{
case DateTimeKind.Unspecified:
// Treat as Local
case DateTimeKind.Utc:
break;
case DateTimeKind.Local:
ts = ts.ToUniversalTime();
break;
default:
throw PGUtil.ThrowIfReached();
}
base.Write(ts, buf);
return;
}
if (value is DateTime)
{
var dt = (DateTime)value;
switch (dt.Kind)
{
case DateTimeKind.Unspecified:
// Treat as Local
case DateTimeKind.Utc:
break;
case DateTimeKind.Local:
dt = dt.ToUniversalTime();
break;
default:
throw PGUtil.ThrowIfReached();
}
base.Write(dt, buf);
return;
}
if (value is DateTimeOffset)
{
base.Write(((DateTimeOffset)value).ToUniversalTime(), buf);
return;
}
throw new InvalidCastException();
}
bool ReadSingleElement(out TElement element)
{
try {
if (_elementLen == -1)
{
if (_readBuf.ReadBytesLeft < 4)
{
element = default(TElement);
return(false);
}
_elementLen = _readBuf.ReadInt32();
Contract.Assume(_elementLen != -1);
}
var asSimpleReader = ElementHandler as ISimpleTypeHandler <TElement>;
if (asSimpleReader != null)
{
if (_readBuf.ReadBytesLeft < _elementLen)
{
element = default(TElement);
return(false);
}
element = asSimpleReader.Read(_readBuf, _elementLen, _fieldDescription);
_elementLen = -1;
return(true);
}
var asChunkingReader = ElementHandler as IChunkingTypeHandler <TElement>;
if (asChunkingReader != null)
{
if (!_preparedRead)
{
asChunkingReader.PrepareRead(_readBuf, _elementLen, _fieldDescription);
_preparedRead = true;
}
if (!asChunkingReader.Read(out element))
{
return(false);
}
_elementLen = -1;
_preparedRead = false;
return(true);
}
throw PGUtil.ThrowIfReached();
} catch (SafeReadException e) {
// TODO: Implement safe reading. For now, translate the safe exception to an unsafe one
// to break the connector.
throw e.InnerException;
}
}
public bool Write(ref DirectBuffer directBuf)
{
var asChunkingWriter = ElementHandler as IChunkingTypeWriter;
switch (_state)
{
case State.Flags:
if (_buf.WriteSpaceLeft < 1)
{
return(false);
}
_buf.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();
}
}
// TODO: Duplicated from ArrayHandler... Refactor...
bool WriteSingleElement([CanBeNull] object element, ref DirectBuffer directBuf)
{
if (element == null || element is DBNull)
{
if (_writeBuf.WriteSpaceLeft < 4)
{
return(false);
}
_writeBuf.WriteInt32(-1);
return(true);
}
var asSimpleWriter = ElementHandler as ISimpleTypeHandler;
if (asSimpleWriter != null)
{
var elementLen = asSimpleWriter.ValidateAndGetLength(element, null);
if (_writeBuf.WriteSpaceLeft < 4 + elementLen)
{
return(false);
}
_writeBuf.WriteInt32(elementLen);
asSimpleWriter.Write(element, _writeBuf, null);
return(true);
}
var asChunkedWriter = ElementHandler as IChunkingTypeHandler;
if (asChunkedWriter != null)
{
if (!_wroteElementLen)
{
if (_writeBuf.WriteSpaceLeft < 4)
{
return(false);
}
_writeBuf.WriteInt32(asChunkedWriter.ValidateAndGetLength(element, ref _lengthCache, null));
asChunkedWriter.PrepareWrite(element, _writeBuf, _lengthCache, null);
_wroteElementLen = true;
}
if (!asChunkedWriter.Write(ref directBuf))
{
return(false);
}
_wroteElementLen = false;
return(true);
}
throw PGUtil.ThrowIfReached();
}
internal void SetValue(object container, object fieldValue)
{
if (_property != null)
{
_property.SetValue(container, fieldValue);
}
else if (_field != null)
{
_field.SetValue(container, fieldValue);
}
else
{
throw PGUtil.ThrowIfReached();
}
}
public bool Write(ref DirectBuffer directBuf)
{
if (_value is BitArray[])
{
return(base.Write <BitArray>(ref directBuf));
}
if (_value is bool[])
{
return(base.Write <bool>(ref directBuf));
}
if (_value is string[])
{
return(base.Write <string>(ref directBuf));
}
throw PGUtil.ThrowIfReached(String.Format("Can't write type {0} as an bitstring array", _value.GetType()));
}
public override bool Write(ref DirectBuffer directBuf)
{
if (_value is BitArray[])
{
return(base.Write <BitArray>(ref directBuf));
}
if (_value is bool[])
{
return(base.Write <bool>(ref directBuf));
}
if (_value is string[])
{
return(base.Write <string>(ref directBuf));
}
throw PGUtil.ThrowIfReached($"Can't write type {_value.GetType()} as an bitstring array");
}
public bool Equals(NpgsqlDate other)
{
switch (_type)
{
case InternalType.Infinity:
return(other._type == InternalType.Infinity);
case InternalType.NegativeInfinity:
return(other._type == InternalType.NegativeInfinity);
case InternalType.Finite:
return(other._type == InternalType.Finite && _daysSinceEra == other._daysSinceEra);
default:
throw PGUtil.ThrowIfReached();
}
}
static InternalType KindToInternalType(DateTimeKind kind)
{
switch (kind)
{
case DateTimeKind.Unspecified:
return(InternalType.FiniteUnspecified);
case DateTimeKind.Utc:
return(InternalType.FiniteUtc);
case DateTimeKind.Local:
return(InternalType.FiniteLocal);
default:
throw PGUtil.ThrowIfReached();
}
}
public NpgsqlDate AddDays(int days)
{
switch (_type)
{
case InternalType.Infinity:
return(Infinity);
case InternalType.NegativeInfinity:
return(NegativeInfinity);
case InternalType.Finite:
return(new NpgsqlDate(_daysSinceEra + days));
default:
throw PGUtil.ThrowIfReached();
}
}
public void PrepareWrite(object value, NpgsqlBuffer buf, LengthCache lengthCache, NpgsqlParameter parameter)
{
_buf = buf;
_lengthCache = lengthCache;
_parameter = parameter;
_state = State.Count;
var asDict = value as IDictionary <string, string>;
if (asDict != null)
{
_value = asDict;
return;
}
throw PGUtil.ThrowIfReached();
}
public void Write(object value, NpgsqlBuffer buf, NpgsqlParameter parameter)
{
if (value is DateTimeOffset)
{
var dto = (DateTimeOffset)value;
buf.WriteInt64(dto.TimeOfDay.Ticks / 10);
buf.WriteInt32(-(int)(dto.Offset.Ticks / TimeSpan.TicksPerSecond));
return;
}
if (value is DateTime)
{
var dt = (DateTime)value;
buf.WriteInt64(dt.TimeOfDay.Ticks / 10);
switch (dt.Kind)
{
case DateTimeKind.Utc:
buf.WriteInt32(0);
break;
case DateTimeKind.Unspecified:
// Treat as local...
case DateTimeKind.Local:
buf.WriteInt32(-(int)(TimeZoneInfo.Local.BaseUtcOffset.Ticks / TimeSpan.TicksPerSecond));
break;
default:
throw PGUtil.ThrowIfReached();
}
return;
}
if (value is TimeSpan)
{
var ts = (TimeSpan)value;
buf.WriteInt64(ts.Ticks / 10);
buf.WriteInt32(-(int)(TimeZoneInfo.Local.BaseUtcOffset.Ticks / TimeSpan.TicksPerSecond));
return;
}
throw PGUtil.ThrowIfReached();
}
/// <summary>
/// Converts the value of the current <see cref="NpgsqlDateTime"/> object to local time.
/// </summary>
/// <remarks>
/// See the MSDN documentation for DateTime.ToLocalTime().
/// <b>Note:</b> this method <b>only</b> takes into account the time zone's base offset, and does
/// <b>not</b> respect daylight savings. See https://github.com/npgsql/npgsql/pull/684 for more
/// details.
/// </remarks>
public NpgsqlDateTime ToLocalTime()
{
switch (_type)
{
case InternalType.FiniteUnspecified:
// Treat as UTC
case InternalType.FiniteUtc:
return(new NpgsqlDateTime(Add(TimeZoneInfo.Local.BaseUtcOffset).Ticks, DateTimeKind.Local));
case InternalType.FiniteLocal:
case InternalType.Infinity:
case InternalType.NegativeInfinity:
return(this);
default:
throw PGUtil.ThrowIfReached();
}
}
internal NpgsqlDate Add(NpgsqlTimeSpan interval, int carriedOverflow)
{
switch (_type)
{
case InternalType.Infinity:
return(Infinity);
case InternalType.NegativeInfinity:
return(NegativeInfinity);
case InternalType.Finite:
break;
default:
throw PGUtil.ThrowIfReached();
}
return(AddMonths(interval.Months).AddDays(interval.Days + carriedOverflow));
}
public override bool Write(ref DirectBuffer directBuf)
{
var bitArray = _value as BitArray;
if (bitArray != null)
{
return(WriteBitArray(bitArray));
}
if (_value is bool)
{
return(WriteBool((bool)_value));
}
var str = _value as string;
if (str != null)
{
return(WriteString(str));
}
throw PGUtil.ThrowIfReached($"Bad type {_value.GetType()} some made its way into BitStringHandler.Write()");
}
public bool Write(ref byte[] directBuf)
{
var bitArray = _value as BitArray;
if (bitArray != null)
{
return(WriteBitArray(bitArray));
}
if (_value is bool)
{
return(WriteBool((bool)_value));
}
var str = _value as string;
if (str != null)
{
return(WriteString(str));
}
throw PGUtil.ThrowIfReached(String.Format("Bad type {0} some made its way into BitStringHandler.Write()", _value.GetType()));
}
/// <summary>
/// Converts the value of the current <see cref="NpgsqlDateTime"/> object to local time.
/// </summary>
/// <remarks>
/// See the MSDN documentation for DateTime.ToLocalTime().
/// <b>Note:</b> this method <b>only</b> takes into account the time zone's base offset, and does
/// <b>not</b> respect daylight savings. See https://github.com/npgsql/npgsql/pull/684 for more
/// details.
/// </remarks>
public NpgsqlDateTime ToLocalTime()
{
switch (_type)
{
case InternalType.FiniteUnspecified:
// Treat as UTC
case InternalType.FiniteUtc:
if (_date.DaysSinceEra >= 1 && _date.DaysSinceEra <= MaxDateTimeDay - 1)
{
// Day between 0001-01-02 and 9999-12-30, so we can use DateTime and it will always succeed
return(new NpgsqlDateTime(TimeZoneInfo.ConvertTimeFromUtc(new DateTime(this.DateTime.Ticks, DateTimeKind.Utc), TimeZoneInfo.Local)));
}
// Else there are no DST rules available in the system for outside the DateTime range, so just use the base offset
return(new NpgsqlDateTime(Add(TimeZoneInfo.Local.BaseUtcOffset).Ticks, DateTimeKind.Local));
case InternalType.FiniteLocal:
case InternalType.Infinity:
case InternalType.NegativeInfinity:
return(this);
default:
throw PGUtil.ThrowIfReached();
}
}
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 override bool Write(NpgsqlBuffer buf, ref DirectBuffer directBuf)
{
Contract.Requires(Statement != null && Statement.All(c => c < 128));
switch (_state)
{
case State.WroteNothing:
_statementNameBytes = PGUtil.UTF8Encoding.GetBytes(Statement);
_queryLen = PGUtil.UTF8Encoding.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();
}
}
public bool Write <TElement>(ref DirectBuffer directBuf)
{
switch (_writeState)
{
case WriteState.WroteNothing:
var len =
4 + // ndim
4 + // has_nulls
4 + // element_oid
_dimensions * 8; // dim (4) + lBound (4)
if (_buf.WriteSpaceLeft < len)
{
Contract.Assume(_buf.Size >= len, "Buffer too small for header");
return(false);
}
_buf.WriteInt32(_dimensions);
_buf.WriteInt32(_hasNulls ? 1 : 0); // Actually not used by backend
_buf.WriteInt32((int)ElementHandler.OID);
var asArray = _writeValue as Array;
if (asArray != null)
{
for (var i = 0; i < _dimensions; i++)
{
_buf.WriteInt32(asArray.GetLength(i));
_buf.WriteInt32(LowerBound); // We don't map .NET lower bounds to PG
}
}
else
{
_buf.WriteInt32(_writeValue.Count);
_buf.WriteInt32(LowerBound); // We don't map .NET lower bounds to PG
_enumerator = _writeValue.GetEnumerator();
}
var asGeneric = _writeValue as IList <TElement>;
_enumerator = asGeneric != null?asGeneric.GetEnumerator() : _writeValue.GetEnumerator();
if (!_enumerator.MoveNext())
{
goto case WriteState.Cleanup;
}
_writeState = WriteState.WritingElements;
goto case WriteState.WritingElements;
case WriteState.WritingElements:
var genericEnumerator = _enumerator as IEnumerator <TElement>;
if (genericEnumerator != null)
{
// TODO: Actually call the element writer generically...!
do
{
if (!WriteSingleElement(genericEnumerator.Current, ref directBuf))
{
return(false);
}
} while (genericEnumerator.MoveNext());
}
else
{
do
{
if (!WriteSingleElement(_enumerator.Current, ref directBuf))
{
return(false);
}
} while (_enumerator.MoveNext());
}
goto case WriteState.Cleanup;
case WriteState.Cleanup:
_writeValue = null;
_buf = null;
_parameter = null;
_writeState = WriteState.NeedPrepare;
return(true);
default:
throw PGUtil.ThrowIfReached();
}
}
