// Token: 0x06000309 RID: 777 RVA: 0x00010FCC File Offset: 0x0000F1CC
private void EncodeRfc2231(EncodingOptions encodingOptions)
{
if (!MimeCommon.IsEncodingRequired(this.decodedValue, encodingOptions.AllowUTF8))
{
this.valueEncoded = false;
this.segmentNumber = -1;
this.valueFragments.AppendFragment(new MimeString(this.decodedValue));
return;
}
Charset encodingCharset = encodingOptions.GetEncodingCharset();
Encoding encoding = encodingCharset.GetEncoding();
int num = 0;
int num2 = 0;
string text = (encodingOptions.CultureName == null) ? string.Empty : encodingOptions.CultureName;
if ((encodingOptions.AllowUTF8 && encodingCharset.CodePage != 20127 && encodingCharset.CodePage != 65001) || (!encodingOptions.AllowUTF8 && encodingCharset.CodePage != 20127) || "en-us" != text)
{
string name = encodingCharset.Name;
byte[] array = new byte[name.Length + text.Length + 2];
num += ByteString.StringToBytes(name, array, num, false);
num2 += name.Length;
array[num++] = 39;
num2++;
num += ByteString.StringToBytes(text, array, num, false);
num2 += text.Length;
array[num++] = 39;
num2++;
this.valueFragments.AppendFragment(new MimeString(array, 0, num));
this.valueEncoded = true;
}
int num3 = 78 - this.paramName.Length - 6;
int num4 = 2;
byte[] bytes = encoding.GetBytes(this.decodedValue);
int i = this.EncodeRfc2231Segment(bytes, 0, num3 - num4 - num2, encodingOptions);
this.segmentNumber = ((i < bytes.Length) ? 0 : -1);
int num5 = 1;
int num6 = 10;
this.AllowAppend = true;
while (i < bytes.Length)
{
MimeParameter mimeParameter = new MimeParameter(this.paramName);
if (num6 == num5)
{
num4++;
num6 *= 10;
}
i = mimeParameter.EncodeRfc2231Segment(bytes, i, num3 - num4, encodingOptions);
mimeParameter.segmentNumber = num5++;
base.InternalAppendChild(mimeParameter);
if (10000 == num5)
{
break;
}
}
this.AllowAppend = false;
}
// Token: 0x060001A3 RID: 419 RVA: 0x00007708 File Offset: 0x00005908
internal MimeStringList GetDisplayNameToWrite(EncodingOptions encodingOptions)
{
MimeStringList result = this.displayNameFragments;
if (result.GetLength(4026531839U) == 0 && this.decodedDisplayName != null && this.decodedDisplayName.Length != 0)
{
string value;
if ((byte)(encodingOptions.EncodingFlags & EncodingFlags.QuoteDisplayNameBeforeRfc2047Encoding) != 0 && this.IsQuotingRequired(this.decodedDisplayName, encodingOptions.AllowUTF8) && MimeCommon.IsEncodingRequired(this.decodedDisplayName, encodingOptions.AllowUTF8))
{
value = this.QuoteString(this.decodedDisplayName);
}
else
{
value = this.decodedDisplayName;
}
result = MimeCommon.EncodeValue(value, encodingOptions, ValueEncodingStyle.Phrase);
this.displayNameFragments = result;
}
else if ((byte)(EncodingFlags.ForceReencode & encodingOptions.EncodingFlags) != 0)
{
result = MimeCommon.EncodeValue(this.DisplayName, encodingOptions, ValueEncodingStyle.Phrase);
}
return(result);
}
// Token: 0x06000252 RID: 594 RVA: 0x0000AF40 File Offset: 0x00009140
internal static MimeStringList EncodeValue(string value, EncodingOptions encodingOptions, ValueEncodingStyle style)
{
if (string.IsNullOrEmpty(value))
{
return(MimeStringList.Empty);
}
if (!MimeCommon.IsEncodingRequired(value, encodingOptions.AllowUTF8))
{
return(new MimeStringList(new MimeString(value)));
}
MimeStringList result = default(MimeStringList);
Charset encodingCharset;
if (encodingOptions.CharsetName != null)
{
encodingCharset = encodingOptions.GetEncodingCharset();
}
else
{
OutboundCodePageDetector outboundCodePageDetector = new OutboundCodePageDetector();
outboundCodePageDetector.AddText(value);
int codePage = outboundCodePageDetector.GetCodePage();
if (!Charset.TryGetCharset(codePage, out encodingCharset))
{
encodingCharset = MimeCommon.DefaultEncodingOptions.GetEncodingCharset();
}
}
ByteEncoder.Tables.CharClasses charClasses = ByteEncoder.Tables.CharClasses.QEncode;
if (style == ValueEncodingStyle.Phrase)
{
charClasses |= ByteEncoder.Tables.CharClasses.QPhraseUnsafe;
}
else if (style == ValueEncodingStyle.Comment)
{
charClasses |= ByteEncoder.Tables.CharClasses.QCommentUnsafe;
}
bool allowQEncoding = false;
MimeCommon.CalculateMethodAndChunkSize calculateMethodAndChunkSize;
if (encodingCharset.Kind == CodePageKind.Sbcs)
{
calculateMethodAndChunkSize = MimeCommon.calculateMethodAndChunkSizeSbcs;
if (encodingCharset.AsciiSupport >= CodePageAsciiSupport.Fine)
{
allowQEncoding = true;
}
}
else if (encodingCharset.Kind == CodePageKind.Dbcs)
{
calculateMethodAndChunkSize = MimeCommon.calculateMethodAndChunkSizeDbcs;
if (encodingCharset.AsciiSupport >= CodePageAsciiSupport.Fine)
{
allowQEncoding = true;
}
}
else if (encodingCharset.CodePage == 65001)
{
calculateMethodAndChunkSize = MimeCommon.calculateMethodAndChunkSizeUtf8;
allowQEncoding = true;
}
else if (encodingCharset.CodePage == 1200 || encodingCharset.CodePage == 1201)
{
calculateMethodAndChunkSize = MimeCommon.calculateMethodAndChunkSizeUnicode16;
}
else if (encodingCharset.CodePage == 12000 || encodingCharset.CodePage == 12001)
{
calculateMethodAndChunkSize = MimeCommon.calculateMethodAndChunkSizeUnicode32;
}
else
{
calculateMethodAndChunkSize = MimeCommon.calculateMethodAndChunkSizeMbcs;
}
int num = 75;
int num2 = 7 + encodingCharset.Name.Length;
int num3 = num - num2;
if (num3 < 32)
{
num = num2 + 32;
num3 = 32;
}
byte[] byteBuffer = ScratchPad.GetByteBuffer(num3);
Encoding encoding = encodingCharset.GetEncoding();
byte[] array = new byte[5 + encodingCharset.Name.Length];
int num4 = 0;
array[num4++] = 61;
array[num4++] = 63;
num4 += ByteString.StringToBytes(encodingCharset.Name, array, num4, false);
array[num4++] = 63;
array[num4++] = 88;
array[num4++] = 63;
MimeString mimeString = new MimeString(array);
int num5 = 0;
byte[] array2 = null;
int num6 = 0;
int num7 = num3 / 4;
while (num5 != value.Length)
{
byte b;
int num8;
calculateMethodAndChunkSize(allowQEncoding, charClasses, encoding, value, num5, num3, out b, out num8);
int bytes;
int num10;
for (;;)
{
for (;;)
{
try
{
bytes = encoding.GetBytes(value, num5, num8, byteBuffer, 0);
}
catch (ArgumentException)
{
if (num8 < 2)
{
throw;
}
num8 -= ((num8 > 10) ? 3 : 1);
if (MimeCommon.IsLowSurrogate(value[num5 + num8]) && MimeCommon.IsHighSurrogate(value[num5 + num8 - 1]))
{
num8--;
}
break;
}
if (bytes == 0)
{
goto IL_424;
}
if (array2 == null || array2.Length - num6 < num + 1)
{
if (array2 != null)
{
result.Append(new MimeString(array2, 0, num6));
num6 = 0;
}
int val = ((value.Length - num5) / num8 + 1) * (num + 1);
int num9 = Math.Min(val, 4096 / (num + 1) * (num + 1));
array2 = new byte[num9];
}
num10 = num6;
if (result.Count > 0 || num10 > 0)
{
array2[num10++] = 32;
}
num10 += mimeString.CopyTo(array2, num10);
array2[num10 - 2] = b;
if (b != 81)
{
goto IL_3F5;
}
int num11 = num10;
int num12 = 0;
while (num12 < bytes && num10 - num11 + 1 <= num3)
{
byte b2 = byteBuffer[num12];
if (MimeCommon.QEncodingRequired((char)b2, charClasses))
{
if (num10 - num11 + 3 > num3)
{
break;
}
array2[num10++] = 61;
array2[num10++] = ByteEncoder.NibbleToHex[b2 >> 4];
array2[num10++] = ByteEncoder.NibbleToHex[(int)(b2 & 15)];
}
else
{
if (b2 == 32)
{
b2 = 95;
}
array2[num10++] = b2;
}
num12++;
}
if (num12 == bytes)
{
goto IL_408;
}
if (num8 < 2)
{
goto Block_26;
}
num8 -= ((num8 > 10) ? 3 : 1);
if (MimeCommon.IsLowSurrogate(value[num5 + num8]) && MimeCommon.IsHighSurrogate(value[num5 + num8 - 1]))
{
num8--;
}
}
}
IL_424:
num5 += num8;
continue;
Block_26:
throw new InvalidOperationException("unexpected thing just happened");
IL_408:
array2[num10++] = 63;
array2[num10++] = 61;
num6 = num10;
goto IL_424;
IL_3F5:
num10 += MimeCommon.Base64EncodeChunk(byteBuffer, 0, bytes, array2, num10);
goto IL_408;
}
if (array2 != null)
{
result.Append(new MimeString(array2, 0, num6));
}
return(result);
}
