internal int DrainRemainingDataForGetByteCount()
{
int totalByteCount = 0;
Debug.Assert(encoding != null);
Rune thisRune;
while ((thisRune = GetNextRune()).Value != 0)
{
if (!encoding.TryGetByteCount(thisRune, out int byteCountThisIteration))
{
// We can't fallback the fallback. We can't make forward progress, so report to our caller
// that something went terribly wrong. The error message contains the fallback char that
// couldn't be converted. (Ideally we'd provide the first char that originally triggered
// the fallback, but it's complicated to keep this state around, and a fallback producing
// invalid data should be a very rare occurrence.)
ThrowLastCharRecursive(thisRune.Value);
}
Debug.Assert(byteCountThisIteration >= 0, "Encoding shouldn't have returned a negative byte count.");
// We need to check for overflow while tallying the fallback byte count.
totalByteCount += byteCountThisIteration;
if (totalByteCount < 0)
{
InternalReset();
Encoding.ThrowConversionOverflow();
}
}
return(totalByteCount);
}
internal int DrainRemainingDataForGetCharCount()
{
int totalCharCount = 0;
Rune thisRune;
while ((thisRune = GetNextRune()).Value != 0)
{
// We need to check for overflow while tallying the fallback char count.
totalCharCount += thisRune.Utf16SequenceLength;
if (totalCharCount < 0)
{
InternalReset();
Encoding.ThrowConversionOverflow();
}
}
return(totalCharCount);
}