decimal INpgsqlSimpleTypeHandler <decimal> .Read(NpgsqlReadBuffer buf, int len, FieldDescription?fieldDescription) => Read(buf, len, fieldDescription);
/// <inheritdoc />
public override async ValueTask <BitArray> Read(NpgsqlReadBuffer buf, int len, bool async, FieldDescription?fieldDescription = null)
{
await buf.Ensure(4, async);
var numBits = buf.ReadInt32();
var result = new BitArray(numBits);
var bytesLeft = len - 4; // Remove leading number of bits
if (bytesLeft == 0)
{
return(result);
}
var bitNo = 0;
while (true)
{
var iterationEndPos = bytesLeft > buf.ReadBytesLeft
? bytesLeft - buf.ReadBytesLeft
: 1;
for (; bytesLeft > iterationEndPos; bytesLeft--)
{
// ReSharper disable ShiftExpressionRealShiftCountIsZero
var chunk = buf.ReadByte();
result[bitNo++] = (chunk & (1 << 7)) != 0;
result[bitNo++] = (chunk & (1 << 6)) != 0;
result[bitNo++] = (chunk & (1 << 5)) != 0;
result[bitNo++] = (chunk & (1 << 4)) != 0;
result[bitNo++] = (chunk & (1 << 3)) != 0;
result[bitNo++] = (chunk & (1 << 2)) != 0;
result[bitNo++] = (chunk & (1 << 1)) != 0;
result[bitNo++] = (chunk & (1 << 0)) != 0;
}
if (bytesLeft == 1)
{
break;
}
Debug.Assert(buf.ReadBytesLeft == 0);
await buf.Ensure(Math.Min(bytesLeft, buf.Size), async);
}
if (bitNo < result.Length)
{
var remainder = result.Length - bitNo;
await buf.Ensure(1, async);
var lastChunk = buf.ReadByte();
for (var i = 7; i >= 8 - remainder; i--)
{
result[bitNo++] = (lastChunk & (1 << i)) != 0;
}
}
return(result);
}
/// <inheritdoc /> public override uint Read(NpgsqlReadBuffer buf, int len, FieldDescription?fieldDescription = null) => buf.ReadUInt32();
internal override object ReadAsObject(NpgsqlReadBuffer buf, int len, FieldDescription?fieldDescription = null) => ReadAsObject(buf, len, false, fieldDescription).Result;
internal override Type GetFieldType(FieldDescription?fieldDescription = null) => fieldDescription != null && fieldDescription.TypeModifier == 1 ? typeof(bool) : typeof(BitArray);
async ValueTask <bool> INpgsqlTypeHandler <bool> .Read(NpgsqlReadBuffer buf, int len, bool async, FieldDescription?fieldDescription)
{
await buf.Ensure(5, async);
var bitLen = buf.ReadInt32();
if (bitLen != 1)
{
throw new InvalidCastException("Can't convert a BIT(N) type to bool, only BIT(1)");
}
var b = buf.ReadByte();
return((b & 128) != 0);
}
internal override object ReadAsObject(NpgsqlReadBuffer buf, int len, FieldDescription?fieldDescription = null)
=> fieldDescription?.TypeModifier == 1
? (object)Read <bool>(buf, len, false, fieldDescription).Result
: Read <BitArray>(buf, len, false, fieldDescription).Result;
ZonedDateTime INpgsqlSimpleTypeHandler <ZonedDateTime> .Read(NpgsqlReadBuffer buf, int len, FieldDescription?fieldDescription)
{
try
{
var value = buf.ReadInt64();
if (value == long.MaxValue || value == long.MinValue)
{
throw new NotSupportedException("Infinity values not supported for timestamp with time zone");
}
return(TimestampHandler.Decode(value).InZone(_dateTimeZoneProvider[buf.Connection.Timezone]));
}
catch (Exception e) when(
string.Equals(buf.Connection.Timezone, "localtime", StringComparison.OrdinalIgnoreCase) &&
(e is TimeZoneNotFoundException || e is DateTimeZoneNotFoundException))
{
throw new TimeZoneNotFoundException(
"The special PostgreSQL timezone 'localtime' is not supported when reading values of type 'timestamp with time zone'. " +
"Please specify a real timezone in 'postgresql.conf' on the server, or set the 'PGTZ' environment variable on the client.",
e);
}
}
OffsetDateTime INpgsqlSimpleTypeHandler <OffsetDateTime> .Read(NpgsqlReadBuffer buf, int len, FieldDescription?fieldDescription) => ((INpgsqlSimpleTypeHandler <ZonedDateTime>) this).Read(buf, len, fieldDescription).ToOffsetDateTime();
/// <inheritdoc />
public override async ValueTask <NpgsqlPath> Read(NpgsqlReadBuffer buf, int len, bool async, FieldDescription?fieldDescription = null)
{
await buf.Ensure(5, async);
var open = buf.ReadByte() switch
{
1 => false,
0 => true,
_ => throw new Exception("Error decoding binary geometric path: bad open byte")
};
var numPoints = buf.ReadInt32();
var result = new NpgsqlPath(numPoints, open);
for (var i = 0; i < numPoints; i++)
{
await buf.Ensure(16, async);
result.Add(new NpgsqlPoint(buf.ReadDouble(), buf.ReadDouble()));
}
return(result);
}
DateTimeOffset INpgsqlSimpleTypeHandler <DateTimeOffset> .Read(NpgsqlReadBuffer buf, int len, FieldDescription?fieldDescription) => _bclHandler.Read <DateTimeOffset>(buf, len, fieldDescription);
/// <inheritdoc />
public override async ValueTask <NpgsqlPolygon> Read(NpgsqlReadBuffer buf, int len, bool async, FieldDescription?fieldDescription = null)
{
await buf.Ensure(4, async);
var numPoints = buf.ReadInt32();
var result = new NpgsqlPolygon(numPoints);
for (var i = 0; i < numPoints; i++)
{
await buf.Ensure(16, async);
result.Add(new NpgsqlPoint(buf.ReadDouble(), buf.ReadDouble()));
}
return(result);
}
long INpgsqlSimpleTypeHandler <long> .Read(NpgsqlReadBuffer buf, int len, FieldDescription?fieldDescription) => buf.ReadByte();
/// <inheritdoc /> public override char Read(NpgsqlReadBuffer buf, int len, FieldDescription?fieldDescription = null) => (char)buf.ReadByte();
Duration INpgsqlSimpleTypeHandler <Duration> .Read(NpgsqlReadBuffer buf, int len, FieldDescription?fieldDescription)
{
var microsecondsInDay = buf.ReadInt64();
var days = buf.ReadInt32();
var totalMonths = buf.ReadInt32();
if (totalMonths != 0)
{
throw new NpgsqlException("Cannot read PostgreSQL interval with non-zero months to NodaTime Duration. Try reading as a NodaTime Period instead.");
}
return(Duration.FromDays(days) + Duration.FromNanoseconds(microsecondsInDay * 1000));
}
internal override Type GetFieldType(FieldDescription?fieldDescription = null) => typeof(Array);
async ValueTask <BitVector32> INpgsqlTypeHandler <BitVector32> .Read(NpgsqlReadBuffer buf, int len, bool async, FieldDescription?fieldDescription)
{
if (len > 4 + 4)
{
throw new InvalidCastException("Can't read PostgreSQL bitstring with more than 32 bits into BitVector32");
}
await buf.Ensure(4 + 4, async);
var numBits = buf.ReadInt32();
return(numBits == 0
? new BitVector32(0)
: new BitVector32(buf.ReadInt32()));
}
internal override Type GetProviderSpecificFieldType(FieldDescription?fieldDescription = null) => typeof(Array);
ValueTask <string> INpgsqlTypeHandler <string> .Read(NpgsqlReadBuffer buf, int len, bool async, FieldDescription?fieldDescription)
=> throw new NotSupportedException("Only writing string to PostgreSQL bitstring is supported, no reading.");
/// <inheritdoc />
protected internal override async ValueTask <TRequestedArray> ReadCustom <TRequestedArray>(NpgsqlReadBuffer buf, int len, bool async, FieldDescription?fieldDescription = null)
{
if (ArrayTypeInfo <TRequestedArray> .IsArray)
{
return((TRequestedArray)(object)await ArrayTypeInfo <TRequestedArray> .ReadArrayFunc(this, buf, async));
}
if (ArrayTypeInfo <TRequestedArray> .IsList)
{
return(await ArrayTypeInfo <TRequestedArray> .ReadListFunc(this, buf, async));
}
throw new InvalidCastException(fieldDescription == null
? $"Can't cast database type to {typeof(TRequestedArray).Name}"
: $"Can't cast database type {fieldDescription.Handler.PgDisplayName} to {typeof(TRequestedArray).Name}"
);
}
/// <inheritdoc />
protected internal override async ValueTask <TRequestedArray> Read <TRequestedArray>(NpgsqlReadBuffer buf, int len, bool async, FieldDescription?fieldDescription = null)
{
if (ArrayTypeInfo <TRequestedArray> .ElementType == typeof(BitArray))
{
if (ArrayTypeInfo <TRequestedArray> .IsArray)
{
return((TRequestedArray)(object) await ReadArray <BitArray>(buf, async));
}
if (ArrayTypeInfo <TRequestedArray> .IsList)
{
return((TRequestedArray)(object) await ReadList <BitArray>(buf, async));
}
}
if (ArrayTypeInfo <TRequestedArray> .ElementType == typeof(bool))
{
if (ArrayTypeInfo <TRequestedArray> .IsArray)
{
return((TRequestedArray)(object) await ReadArray <bool>(buf, async));
}
if (ArrayTypeInfo <TRequestedArray> .IsList)
{
return((TRequestedArray)(object) await ReadList <bool>(buf, async));
}
}
return(await base.Read <TRequestedArray>(buf, len, async, fieldDescription));
}
ValueTask <ReadOnlyMemory <byte> > INpgsqlTypeHandler <ReadOnlyMemory <byte> > .Read(NpgsqlReadBuffer buf, int len, bool async, FieldDescription?fieldDescriptioncancellationToken)
=> throw new NotSupportedException("Only writing ReadOnlyMemory<byte> to PostgreSQL bytea is supported, no reading.");
internal override async ValueTask <object> ReadAsObject(NpgsqlReadBuffer buf, int len, bool async, FieldDescription?fieldDescription = null)
=> fieldDescription?.TypeModifier == 1
? await ReadArray <bool>(buf, async)
: await ReadArray <BitArray>(buf, async);
/// <inheritdoc />
public override async ValueTask <byte[]> Read(NpgsqlReadBuffer buf, int len, bool async, FieldDescription?fieldDescription = null)
{
var bytes = new byte[len];
var pos = 0;
while (true)
{
var toRead = Math.Min(len - pos, buf.ReadBytesLeft);
buf.ReadBytes(bytes, pos, toRead);
pos += toRead;
if (pos == len)
{
break;
}
await buf.ReadMore(async);
}
return(bytes);
}
internal override Type GetProviderSpecificFieldType(FieldDescription?fieldDescription = null) => GetFieldType(fieldDescription);
ValueTask <ArraySegment <byte> > INpgsqlTypeHandler <ArraySegment <byte> > .Read(NpgsqlReadBuffer buf, int len, bool async, FieldDescription?fieldDescription)
=> throw new NotSupportedException("Only writing ArraySegment<byte> to PostgreSQL bytea is supported, no reading.");
public override NpgsqlLogSequenceNumber Read(NpgsqlReadBuffer buf, int len, FieldDescription?fieldDescription = null)
{
Debug.Assert(len == 8);
return(new NpgsqlLogSequenceNumber(buf.ReadUInt64()));
}
TimeSpan INpgsqlSimpleTypeHandler <TimeSpan> .Read(NpgsqlReadBuffer buf, int len, FieldDescription?fieldDescription) => _bclHandler.Read <TimeSpan>(buf, len, fieldDescription);
/// <summary> /// Reads a value of type <typeparamref name="TDefault"/> with the given length from the provided buffer, /// with the assumption that it is entirely present in the provided memory buffer and no I/O will be /// required. /// </summary> /// <param name="buf">The buffer from which to read.</param> /// <param name="len">The byte length of the value. The buffer might not contain the full length, requiring I/O to be performed.</param> /// <param name="fieldDescription">Additional PostgreSQL information about the type, such as the length in varchar(30).</param> /// <returns>The fully-read value.</returns> public abstract TDefault Read(NpgsqlReadBuffer buf, int len, FieldDescription?fieldDescription = null);
short INpgsqlSimpleTypeHandler <short> .Read(NpgsqlReadBuffer buf, int len, FieldDescription?fieldDescription) => checked ((short)Read(buf, len, fieldDescription));
