// Token: 0x0600030A RID: 778 RVA: 0x000111C4 File Offset: 0x0000F3C4
private int EncodeRfc2231Segment(byte[] source, int sourceIndex, int maxValueLength, EncodingOptions encodingOptions)
{
byte[] array = new byte[maxValueLength * 4];
int count = 0;
int num = 0;
while (sourceIndex < source.Length)
{
int i = 1;
byte b = source[sourceIndex];
bool flag = true;
if (b >= 128)
{
if (encodingOptions.AllowUTF8 && MimeScan.IsUTF8NonASCII(source, sourceIndex, source.Length, out i))
{
flag = false;
}
}
else if (!MimeScan.IsSegmentEncodingRequired(b))
{
flag = false;
}
if (flag)
{
if (num + 3 > maxValueLength)
{
break;
}
array[count++] = 37;
array[count++] = MimeParameter.OctetEncoderMap[b >> 4];
array[count++] = MimeParameter.OctetEncoderMap[(int)(b & 15)];
num += 3;
this.valueEncoded = true;
sourceIndex++;
}
else
{
if (num + 1 > maxValueLength)
{
break;
}
while (i > 0)
{
array[count++] = source[sourceIndex++];
i--;
}
num++;
}
}
this.valueFragments.AppendFragment(new MimeString(array, 0, count));
return(sourceIndex);
}