private void method_12()
{
int sectionStartPosition1 = (int)Class653.smethod_0(this.int_0);
int num1 = sectionStartPosition1 + (int)this.memoryStream_0.Length;
int sectionStartPosition2 = num1 + (int)this.memoryStream_4.Length;
int sectionStartPosition3 = sectionStartPosition2 + (int)this.memoryStream_1.Length;
int sectionStartPosition4 = sectionStartPosition3 + (int)this.memoryStream_2.Length + (int)this.memoryStream_3.Length + (int)this.memoryStream_5.Length;
int sectionStartPosition5 = sectionStartPosition4 + (int)this.memoryStream_6.Length + (int)this.memoryStream_7.Length;
MemoryStream memoryStream = new MemoryStream();
Interface29 streamWriter = Class724.Create(this.dxfVersion_0, (Stream)memoryStream, Encodings.GetEncoding((int)this.dxfModel_0.Header.DrawingCodePage));
streamWriter.imethod_13(Encodings.Ascii.GetBytes(this.dxfModel_0.Header.AcadVersionString), 0, 6);
Interface29 nterface29 = streamWriter;
byte[] numArray = new byte[7];
numArray[5] = (byte)15;
numArray[6] = (byte)1;
byte[] bytes = numArray;
nterface29.imethod_12(bytes);
streamWriter.imethod_19(num1);
streamWriter.imethod_11((byte)27);
streamWriter.imethod_11((byte)25);
int num2 = (int)Class952.smethod_1(this.dxfModel_0.Header.DrawingCodePage);
streamWriter.imethod_13(LittleEndianBitConverter.GetBytes((short)num2), 0, 2);
streamWriter.imethod_13(LittleEndianBitConverter.GetBytes(this.int_0), 0, 4);
long position = this.stream_0.Position;
this.method_13(streamWriter, (byte)0, sectionStartPosition2, (int)this.memoryStream_1.Length);
this.method_13(streamWriter, (byte)1, sectionStartPosition3, (int)this.memoryStream_2.Length);
this.method_13(streamWriter, (byte)2, sectionStartPosition4, (int)this.memoryStream_6.Length);
this.method_13(streamWriter, (byte)3, 0, 0);
this.method_13(streamWriter, (byte)4, sectionStartPosition5, (int)this.memoryStream_9.Length);
this.method_13(streamWriter, (byte)5, sectionStartPosition1, (int)this.memoryStream_0.Length);
streamWriter.Flush();
ushort num3 = Stream1.smethod_1((ushort)49345, memoryStream.GetBuffer(), 0L, memoryStream.Length);
streamWriter.imethod_18((short)num3);
streamWriter.imethod_13(Class800.byte_4, 0, Class800.byte_4.Length);
this.stream_0.Write(memoryStream.GetBuffer(), 0, (int)memoryStream.Length);
}
public static void smethod_2(PagedMemoryStream from, Interface29 to)
{
int length1 = (int)from.Length;
for (int index = 0; index < from.Pages.Count; ++index)
{
int length2 = System.Math.Min(length1, from.PageSize);
to.imethod_13(from.Pages[index], 0, length2);
length1 -= length2;
if (length1 <= 0)
{
break;
}
}
}
private void method_14(Interface29 w, Stream stream, long dataSizeInBits)
{
int length1 = (int)(dataSizeInBits >> 3);
int num1 = (int)dataSizeInBits & 7;
PagedMemoryStream pagedMemoryStream = stream as PagedMemoryStream;
if (pagedMemoryStream != null)
{
int val2 = length1;
foreach (byte[] page in pagedMemoryStream.Pages)
{
int length2 = System.Math.Min(page.Length, val2);
if (length2 > 0)
{
w.imethod_13(page, 0, length2);
}
val2 -= length2;
if (val2 <= 0)
{
break;
}
}
}
else
{
MemoryStream memoryStream = stream as MemoryStream;
if (memoryStream != null)
{
w.imethod_13(memoryStream.GetBuffer(), 0, length1);
}
else
{
byte[] numArray = new byte[1024];
int num2 = length1 / 1024;
for (int index = 0; index < num2; ++index)
{
stream.Read(numArray, 0, 1024);
w.imethod_13(numArray, 0, 1024);
}
int num3 = length1 % 1024;
if (num3 > 0)
{
stream.Read(numArray, 0, num3);
w.imethod_13(numArray, 0, num3);
}
}
}
if (num1 == 0)
{
return;
}
stream.Position = (long)length1;
int num4 = stream.ReadByte();
for (; num1 > 0; --num1)
{
w.imethod_14((num4 & 128) != 0);
num4 <<= 1;
}
stream.Position = 0L;
}