// Reads off from the network buffer and caches bytes. Only reads one column value in the current row.
internal static bool TryCreate(SqlMetaDataPriv metadata, TdsParser parser, TdsParserStateObject stateObj, out SqlCachedBuffer buffer)
{
int cb = 0;
ulong plplength;
byte[] byteArr;
List <byte[]> cachedBytes = new List <byte[]>();
buffer = null;
// the very first length is already read.
if (!parser.TryPlpBytesLeft(stateObj, out plplength))
{
return(false);
}
// For now we only handle Plp data from the parser directly.
Debug.Assert(metadata.metaType.IsPlp, "SqlCachedBuffer call on a non-plp data");
do
{
if (plplength == 0)
{
break;
}
do
{
cb = (plplength > (ulong)_maxChunkSize) ? _maxChunkSize : (int)plplength;
byteArr = new byte[cb];
if (!stateObj.TryReadPlpBytes(ref byteArr, 0, cb, out cb))
{
return(false);
}
Debug.Assert(cb == byteArr.Length);
if (cachedBytes.Count == 0)
{
// Add the Byte order mark if needed if we read the first array
AddByteOrderMark(byteArr, cachedBytes);
}
cachedBytes.Add(byteArr);
plplength -= (ulong)cb;
} while (plplength > 0);
if (!parser.TryPlpBytesLeft(stateObj, out plplength))
{
return(false);
}
} while (plplength > 0);
Debug.Assert(stateObj._longlen == 0 && stateObj._longlenleft == 0);
buffer = new SqlCachedBuffer(cachedBytes);
return(true);
}
// Reads off from the network buffer and caches bytes. Only reads one column value in the current row.
static internal bool TryCreate(SqlMetaDataPriv metadata, TdsParser parser, TdsParserStateObject stateObj, out SqlCachedBuffer buffer)
{
int cb = 0;
ulong plplength;
byte[] byteArr;
List<byte[]> cachedBytes = new List<byte[]>();
buffer = null;
// the very first length is already read.
if (!parser.TryPlpBytesLeft(stateObj, out plplength))
{
return false;
}
// For now we only handle Plp data from the parser directly.
Debug.Assert(metadata.metaType.IsPlp, "SqlCachedBuffer call on a non-plp data");
do
{
if (plplength == 0)
break;
do
{
cb = (plplength > (ulong)_maxChunkSize) ? _maxChunkSize : (int)plplength;
byteArr = new byte[cb];
if (!stateObj.TryReadPlpBytes(ref byteArr, 0, cb, out cb))
{
return false;
}
Debug.Assert(cb == byteArr.Length);
if (cachedBytes.Count == 0)
{
// Add the Byte order mark if needed if we read the first array
AddByteOrderMark(byteArr, cachedBytes);
}
cachedBytes.Add(byteArr);
plplength -= (ulong)cb;
} while (plplength > 0);
if (!parser.TryPlpBytesLeft(stateObj, out plplength))
{
return false;
}
} while (plplength > 0);
Debug.Assert(stateObj._longlen == 0 && stateObj._longlenleft == 0);
buffer = new SqlCachedBuffer(cachedBytes);
return true;
}
// Reads off from the network buffer and caches bytes. Only reads one column value in the current row.
internal SqlCachedStream(SqlCachedBuffer sqlBuf)
{
_cachedBytes = sqlBuf.CachedBytes;
}
// Reads off from the network buffer and caches bytes. Only reads one column value in the current row.
internal SqlCachedStream(SqlCachedBuffer sqlBuf)
{
_cachedBytes = sqlBuf.CachedBytes;
}
internal void ReadSqlValue(SqlBuffer value, SqlMetaDataPriv md, int length, TdsParserStateObject stateObj)
{
if (md.metaType.IsPlp)
{
length = 0x7fffffff;
}
switch (md.tdsType)
{
case 0x22:
case 0x25:
case 0x2d:
case 240:
case 0xa5:
case 0xad:
{
byte[] buff = null;
if (md.metaType.IsPlp)
{
stateObj.ReadPlpBytes(ref buff, 0, length);
}
else
{
buff = new byte[length];
stateObj.ReadByteArray(buff, 0, length);
}
value.SqlBinary = new SqlBinary(buff, true);
return;
}
case 0x23:
case 0x27:
case 0x2f:
case 0x63:
case 0xef:
case 0xe7:
case 0xa7:
case 0xaf:
this.ReadSqlStringValue(value, md.tdsType, length, md.encoding, md.metaType.IsPlp, stateObj);
return;
case 40:
case 0x29:
case 0x2a:
case 0x2b:
this.ReadSqlDateTime(value, md.tdsType, length, md.scale, stateObj);
return;
case 0x6a:
case 0x6c:
this.ReadSqlDecimal(value, length, md.precision, md.scale, stateObj);
return;
case 0xf1:
{
SqlCachedBuffer buffer2 = new SqlCachedBuffer(md, this, stateObj);
value.SqlCachedBuffer = buffer2;
return;
}
}
this.ReadSqlValueInternal(value, md.tdsType, md.metaType.TypeId, length, stateObj);
}