internal ulong PlpBytesLeft(TdsParserStateObject stateObj)
{
if ((stateObj._longlen != 0) && (stateObj._longlenleft == 0))
stateObj.ReadPlpLength(false);
return stateObj._longlenleft;
}
internal int ReadPlpAnsiChars(ref char[] buff, int offst, int len, SqlMetaDataPriv metadata, TdsParserStateObject stateObj)
{
int charsRead = 0;
int charsLeft = 0;
int bytesRead = 0;
int totalcharsRead = 0;
if (stateObj._longlen == 0)
{
Debug.Assert(stateObj._longlenleft == 0);
return 0; // No data
}
Debug.Assert(((ulong)stateObj._longlen != TdsEnums.SQL_PLP_NULL),
"Out of sync plp read request");
Debug.Assert((buff == null && offst == 0) || (buff.Length >= offst + len), "Invalid length sent to ReadPlpAnsiChars()!");
charsLeft = len;
if (stateObj._longlenleft == 0)
{
stateObj.ReadPlpLength(false);
if (stateObj._longlenleft == 0)
{// Data read complete
stateObj._plpdecoder = null;
return 0;
}
}
if (stateObj._plpdecoder == null)
{
Encoding enc = metadata.encoding;
if (enc == null)
{
if (null == _defaultEncoding)
{
ThrowUnsupportedCollationEncountered(stateObj);
}
enc = _defaultEncoding;
}
stateObj._plpdecoder = enc.GetDecoder();
}
while (charsLeft > 0)
{
bytesRead = (int)Math.Min(stateObj._longlenleft, (ulong)charsLeft);
if ((stateObj._bTmp == null) || (stateObj._bTmp.Length < bytesRead))
{
// Grow the array
stateObj._bTmp = new byte[bytesRead];
}
bytesRead = stateObj.ReadPlpBytesChunk(stateObj._bTmp, 0, bytesRead);
charsRead = stateObj._plpdecoder.GetChars(stateObj._bTmp, 0, bytesRead, buff, offst);
charsLeft -= charsRead;
offst += charsRead;
totalcharsRead += charsRead;
if (stateObj._longlenleft == 0) // Read the next chunk or cleanup state if hit the end
stateObj.ReadPlpLength(false);
if (stateObj._longlenleft == 0)
{ // Data read complete
stateObj._plpdecoder = null;
break;
}
}
return (totalcharsRead);
}
internal ulong GetDataLength(SqlMetaDataPriv colmeta, TdsParserStateObject stateObj)
{
if (this._isYukon && colmeta.metaType.IsPlp)
{
return stateObj.ReadPlpLength(true);
}
return (ulong) this.GetTokenLength(colmeta.tdsType, stateObj);
}
internal ulong SkipPlpValue(ulong cb, TdsParserStateObject stateObj)
{
ulong num2 = 0L;
if (stateObj._longlenleft == 0L)
{
stateObj.ReadPlpLength(false);
}
while ((num2 < cb) && (stateObj._longlenleft > 0L))
{
int num;
if (stateObj._longlenleft > 0x7fffffffL)
{
num = 0x7fffffff;
}
else
{
num = (int) stateObj._longlenleft;
}
num = ((cb - num2) < num) ? ((int) (cb - num2)) : num;
this.SkipBytes(num, stateObj);
stateObj._longlenleft -= num;
num2 += num;
if (stateObj._longlenleft == 0L)
{
stateObj.ReadPlpLength(false);
}
}
return num2;
}
internal int ReadPlpUnicodeChars(ref char[] buff, int offst, int len, TdsParserStateObject stateObj)
{
int num = 0;
int num2 = 0;
int num3 = 0;
if (stateObj._longlen != 0L)
{
num2 = len;
if ((buff == null) && (stateObj._longlen != 18446744073709551614L))
{
buff = new char[Math.Min((int) stateObj._longlen, len)];
}
if (stateObj._longlenleft != 0L)
{
goto Label_0150;
}
stateObj.ReadPlpLength(false);
if (stateObj._longlenleft != 0L)
{
goto Label_0150;
}
}
return 0;
Label_0150:
while (num2 > 0)
{
num = (int) Math.Min((stateObj._longlenleft + 1L) >> 1, (ulong) num2);
if ((buff == null) || (buff.Length < (offst + num)))
{
char[] dst = new char[offst + num];
if (buff != null)
{
Buffer.BlockCopy(buff, 0, dst, 0, offst * 2);
}
buff = dst;
}
if (num > 0)
{
num = this.ReadPlpUnicodeCharsChunk(buff, offst, num, stateObj);
num2 -= num;
offst += num;
num3 += num;
}
if ((stateObj._longlenleft == 1L) && (num2 > 0))
{
byte num5 = stateObj.ReadByte();
stateObj._longlenleft -= (ulong) 1L;
stateObj.ReadPlpLength(false);
byte num4 = stateObj.ReadByte();
stateObj._longlenleft -= (ulong) 1L;
buff[offst] = (char) (((num4 & 0xff) << 8) + (num5 & 0xff));
offst++;
num++;
num2--;
num3++;
}
if (stateObj._longlenleft == 0L)
{
stateObj.ReadPlpLength(false);
}
if (stateObj._longlenleft == 0L)
{
return num3;
}
}
return num3;
}
internal int ReadPlpAnsiChars(ref char[] buff, int offst, int len, SqlMetaDataPriv metadata, TdsParserStateObject stateObj)
{
int num3 = 0;
int num2 = 0;
int num = 0;
int num4 = 0;
if (stateObj._longlen == 0L)
{
return 0;
}
num2 = len;
if (stateObj._longlenleft == 0L)
{
stateObj.ReadPlpLength(false);
if (stateObj._longlenleft == 0L)
{
return 0;
}
}
Encoding encoding = metadata.encoding;
if (encoding == null)
{
if (this._defaultEncoding == null)
{
this.ThrowUnsupportedCollationEncountered(stateObj);
}
encoding = this._defaultEncoding;
}
while (num2 > 0)
{
num = (int) Math.Min(stateObj._longlenleft, (ulong) num2);
if ((stateObj._bTmp == null) || (stateObj._bTmp.Length < num))
{
stateObj._bTmp = new byte[num];
}
num = stateObj.ReadPlpBytesChunk(stateObj._bTmp, 0, num);
num3 = encoding.GetChars(stateObj._bTmp, 0, num, buff, offst);
num2 -= num3;
offst += num3;
num4 += num3;
if (stateObj._longlenleft == 0L)
{
stateObj.ReadPlpLength(false);
}
if (stateObj._longlenleft == 0L)
{
return num4;
}
}
return num4;
}