internal static long QuoteAndFold(Stream stream, MimeStringList fragments, uint inputMask, bool quoteOutput, bool addSpaceAtStart, bool allowUTF8, int lastLineReserve, ref MimeStringLength currentLineLength, ref byte[] scratchBuffer)
{
long num = 0L;
Header.LineBuffer lineBuffer = default(Header.LineBuffer);
lineBuffer.Length = new MimeStringLength(0);
lineBuffer.LengthTillLastLWSP = new MimeStringLength(-1);
if (scratchBuffer == null || scratchBuffer.Length < 998)
{
scratchBuffer = new byte[998];
}
lineBuffer.Bytes = scratchBuffer;
MimeScan.Token token = quoteOutput ? (MimeScan.Token.Spec | MimeScan.Token.Fwsp) : MimeScan.Token.Fwsp;
bool flag = false;
if (addSpaceAtStart && currentLineLength.InBytes != 0)
{
num += Header.WriteToken(Header.Space, 0, new MimeStringLength(1), stream, ref currentLineLength, ref lineBuffer, ref flag, allowUTF8);
flag = true;
}
if (quoteOutput)
{
num += Header.WriteToken(Header.DoubleQuote, 0, new MimeStringLength(1), stream, ref currentLineLength, ref lineBuffer, ref flag, allowUTF8);
}
for (int i = 0; i < fragments.Count; i++)
{
MimeString mimeString = fragments[i];
int num2 = 0;
int num3 = 0;
byte[] data = mimeString.GetData(out num2, out num3);
if ((mimeString.Mask & inputMask) != 0U)
{
do
{
int valueInChars = 0;
int num4 = MimeScan.FindNextOf(token, data, num2, num3, out valueInChars, allowUTF8);
if (num4 > 0)
{
num += Header.WriteToken(data, num2, new MimeStringLength(valueInChars, num4), stream, ref currentLineLength, ref lineBuffer, ref flag, allowUTF8);
num2 += num4;
num3 -= num4;
}
if (num3 != 0)
{
byte b = data[num2];
if ((b == 34 || b == 92) && (mimeString.Mask & 3758096383U) != 0U)
{
num += Header.WriteToken(new byte[]
{
92,
data[num2]
}, 0, new MimeStringLength(2), stream, ref currentLineLength, ref lineBuffer, ref flag, allowUTF8);
num2++;
num3--;
}
else
{
num += Header.WriteToken(new byte[]
{
data[num2]
}, 0, new MimeStringLength(1), stream, ref currentLineLength, ref lineBuffer, ref flag, allowUTF8);
num2++;
num3--;
}
}
}while (num3 != 0);
}
}
if (quoteOutput)
{
num += Header.WriteToken(Header.DoubleQuote, 0, new MimeStringLength(1), stream, ref currentLineLength, ref lineBuffer, ref flag, allowUTF8);
}
if (lastLineReserve > 0)
{
num += Header.WriteToken(null, 0, new MimeStringLength(lastLineReserve), stream, ref currentLineLength, ref lineBuffer, ref flag, allowUTF8);
}
if (lineBuffer.Length.InBytes > 0)
{
stream.Write(lineBuffer.Bytes, 0, lineBuffer.Length.InBytes);
num += (long)lineBuffer.Length.InBytes;
currentLineLength.IncrementBy(lineBuffer.Length);
}
return(num);
}