private void ZeroExpandFragment(ValuePosition start, ValuePosition end, bool allowControlCharacters, System.Text.StringBuilder sb)
{
var valueIterator = new ValueIterator(iterator.Lines, iterator.LinesMask, start, end);
while (!valueIterator.Eof) {
var num = (byte) valueIterator.Get();
if (!allowControlCharacters && num < 32)
num = (byte) ValueDecoder.ReplaceProhibitedControlCharacter((char) num);
sb.Append((char) num);
}
}
private Globalization.Charset DetectValueCharset(Globalization.Charset defaultCharset, bool enableJisDetection, bool enableUtf8Detection, bool enableDbcsDetection, out EncodingScheme encodingScheme)
{
var valueIterator = new ValueIterator(iterator.Lines, iterator.LinesMask);
var inboundCharsetDetector = new Globalization.FeInboundCharsetDetector(defaultCharset.CodePage, false, enableJisDetection, enableUtf8Detection, enableDbcsDetection);
while (!valueIterator.Eof) {
inboundCharsetDetector.AddBytes(valueIterator.Bytes, valueIterator.Offset, valueIterator.Length, false);
valueIterator.Get(valueIterator.Length);
}
inboundCharsetDetector.AddBytes(null, 0, 0, true);
var codePageChoice = inboundCharsetDetector.GetCodePageChoice();
if (codePageChoice != defaultCharset.CodePage)
defaultCharset = Globalization.Charset.GetCharset(codePageChoice);
encodingScheme = inboundCharsetDetector.PureAscii
? (!(defaultCharset.Name == "iso-2022-jp") || inboundCharsetDetector.Iso2022KrLikely ? EncodingScheme.None : EncodingScheme.Jis)
: (inboundCharsetDetector.Iso2022JpLikely || inboundCharsetDetector.Iso2022KrLikely ? EncodingScheme.Jis : EncodingScheme.EightBit);
return defaultCharset;
}
private void DecodeEncodedWord(
byte bOrQ, System.Text.Decoder decoder, ValuePosition encodedWordContentStart, ValuePosition encodedWordContentEnd, bool allowControlCharacters, ref byte[] byteBuffer, ref char[] charBuffer, System.Text.StringBuilder sb)
{
var valueIterator = new ValueIterator(iterator.Lines, iterator.LinesMask, encodedWordContentStart, encodedWordContentEnd);
if (charBuffer == null)
charBuffer = Internal.ScratchPad.GetCharBuffer(System.Math.Min(1024, iterator.TotalLength));
if (byteBuffer == null)
byteBuffer = Internal.ScratchPad.GetByteBuffer(System.Math.Max(maxCharsetNameLength + 1, System.Math.Min(1024, iterator.TotalLength)));
var byteBufferLength = 0;
if (bOrQ == 66) {
var num1 = 0;
var num2 = 0;
while (!valueIterator.Eof) {
var num3 = (byte) (valueIterator.Get() - 32);
if (num3 < Schema.Mime.Encoders.ByteEncoder.Tables.Base64ToByte.Length) {
var num4 = Schema.Mime.Encoders.ByteEncoder.Tables.Base64ToByte[num3];
if (num4 < 64) {
num2 = num2 << 6 | num4;
++num1;
if (num1 == 4) {
var numArray1 = byteBuffer;
var index1 = byteBufferLength;
var num5 = 1;
var num6 = index1 + num5;
int num7 = (byte) (num2 >> 16);
numArray1[index1] = (byte) num7;
var numArray2 = byteBuffer;
var index2 = num6;
var num8 = 1;
var num9 = index2 + num8;
int num10 = (byte) (num2 >> 8);
numArray2[index2] = (byte) num10;
var numArray3 = byteBuffer;
var index3 = num9;
var num11 = 1;
byteBufferLength = index3 + num11;
int num12 = (byte) num2;
numArray3[index3] = (byte) num12;
num1 = 0;
if (byteBufferLength + 3 >= byteBuffer.Length) {
this.FlushDecodedBytes(byteBuffer, byteBufferLength, decoder, allowControlCharacters, charBuffer, sb);
byteBufferLength = 0;
}
}
}
}
}
if (num1 != 0) {
if (num1 == 2) {
var num3 = num2 << 12;
byteBuffer[byteBufferLength++] = (byte) (num3 >> 16);
} else if (num1 == 3) {
var num3 = num2 << 6;
var numArray1 = byteBuffer;
var index1 = byteBufferLength;
var num4 = 1;
var num5 = index1 + num4;
int num6 = (byte) (num3 >> 16);
numArray1[index1] = (byte) num6;
var numArray2 = byteBuffer;
var index2 = num5;
var num7 = 1;
byteBufferLength = index2 + num7;
int num8 = (byte) (num3 >> 8);
numArray2[index2] = (byte) num8;
}
}
} else {
while (!valueIterator.Eof) {
var num1 = (byte) valueIterator.Get();
switch (num1) {
case 61:
var index1 = valueIterator.Get();
var index2 = valueIterator.Get();
int num2 = index1 < 0 ? byte.MaxValue : Schema.Mime.Encoders.ByteEncoder.Tables.NumFromHex[index1];
int num3 = index2 < 0 ? byte.MaxValue : Schema.Mime.Encoders.ByteEncoder.Tables.NumFromHex[index2];
num1 = num2 == (int) byte.MaxValue || num3 == (int) byte.MaxValue ? (byte) 61 : (byte) (num2 << 4 | num3);
break;
case 95:
num1 = 32;
break;
}
byteBuffer[byteBufferLength++] = num1;
if (byteBufferLength >= byteBuffer.Length) {
this.FlushDecodedBytes(byteBuffer, byteBufferLength, decoder, allowControlCharacters, charBuffer, sb);
byteBufferLength = 0;
}
}
}
if (byteBufferLength == 0)
return;
this.FlushDecodedBytes(byteBuffer, byteBufferLength, decoder, allowControlCharacters, charBuffer, sb);
}
public ValueDecoder(MimeStringList lines, uint linesMask)
{
iterator = new ValueIterator(lines, linesMask);
maxCharsetNameLength = System.Math.Max(60, Globalization.Charset.MaxCharsetNameLength) + 10 + 1;
}
private void ConvertRawFragment(ValuePosition start, ValuePosition end, System.Text.Decoder decoder, bool allowControlCharacters, ref char[] charBuffer, System.Text.StringBuilder sb)
{
var valueIterator = new ValueIterator(iterator.Lines, iterator.LinesMask, start, end);
if (valueIterator.Eof)
return;
if (charBuffer == null)
charBuffer = Internal.ScratchPad.GetCharBuffer(System.Math.Min(1024, iterator.TotalLength));
int bytesUsed;
int charsUsed;
bool completed;
do {
decoder.Convert(valueIterator.Bytes, valueIterator.Offset, valueIterator.Length, charBuffer, 0, charBuffer.Length, false, out bytesUsed, out charsUsed, out completed);
if (charsUsed != 0) {
if (!allowControlCharacters)
ValueDecoder.RemoveProhibitedControlCharacters(charBuffer, 0, charsUsed);
sb.Append(charBuffer, 0, charsUsed);
}
valueIterator.Get(bytesUsed);
} while (!completed || !valueIterator.Eof);
decoder.Convert(MimeString.EmptyByteArray, 0, 0, charBuffer, 0, charBuffer.Length, true, out bytesUsed, out charsUsed, out completed);
if (charsUsed == 0)
return;
if (!allowControlCharacters)
ValueDecoder.RemoveProhibitedControlCharacters(charBuffer, 0, charsUsed);
sb.Append(charBuffer, 0, charsUsed);
}
