private void method_17(Class504 section, Class889 byteStream)
{
byteStream.vmethod_15(section.DataSize);
byteStream.vmethod_15(section.MaxDecompressedPageSize);
byteStream.vmethod_15(section.Encrypted);
byteStream.vmethod_15(section.HashCode);
ulong num = (ulong)section.Name.Length;
if (num > 0UL)
{
num = (ulong)((long)num + 1L << 1);
}
byteStream.vmethod_15(num);
byteStream.vmethod_15(section.Unknown);
byteStream.vmethod_15(section.Encoding);
byteStream.vmethod_15(section.PageCount);
if (num > 0UL)
{
byte[] bytes = Encoding.Unicode.GetBytes(section.Name);
byteStream.Stream.Write(bytes, 0, bytes.Length);
byteStream.vmethod_1((byte)0);
byteStream.vmethod_1((byte)0);
}
foreach (Class443 page in section.Pages)
{
byteStream.vmethod_15(page.DataOffset);
byteStream.vmethod_15(page.PageSize);
byteStream.vmethod_13(page.Id);
byteStream.vmethod_15(page.DecompressedSize);
byteStream.vmethod_15(page.CompressedSize);
byteStream.vmethod_15(page.CheckSum);
byteStream.vmethod_15(page.Crc);
}
}
private void method_21(Class504 section)
{
section.DataSize = (ulong)section.Stream.Length;
ulong num = (ulong)section.Stream.Length / section.MaxDecompressedPageSize;
byte[] buffer = section.Stream.GetBuffer();
section.Stream.Dispose();
section.Stream = (MemoryStream)null;
ulong position = 0;
for (int index = 0; index < (int)num; ++index)
{
this.method_22(section, buffer, position, section.MaxDecompressedPageSize);
position += section.MaxDecompressedPageSize;
}
ulong uncompressedLength = section.DataSize % section.MaxDecompressedPageSize;
if (uncompressedLength > 0UL)
{
this.method_22(section, buffer, position, uncompressedLength);
++num;
}
section.PageCount = num;
}
private unsafe void method_22(
Class504 section,
byte[] buffer,
ulong position,
ulong uncompressedLength)
{
Class443 class443 = new Class443();
class443.PageSize = section.MaxDecompressedPageSize;
class443.DataOffset = position;
class443.DecompressedSize = uncompressedLength;
class443.CheckSum = (ulong)Class996.smethod_3((ulong)this.uint_0, buffer, (uint)position, (uint)uncompressedLength);
Class746 class7461 = Class746.class746_1;
MemoryStream memoryStream = new MemoryStream();
if (section.Compressed)
{
new Class955().method_1(buffer, (int)position, (int)uncompressedLength, (Stream)memoryStream);
if (memoryStream.Length >= (long)uncompressedLength)
{
memoryStream = new MemoryStream();
memoryStream.Write(buffer, (int)position, (int)uncompressedLength);
}
}
else
{
memoryStream.Write(buffer, (int)position, (int)uncompressedLength);
}
class443.CompressedSize = (ulong)memoryStream.Length;
class443.Crc = Class656.class656_1.method_0(memoryStream.GetBuffer(), 0U, (uint)memoryStream.Length, Class656.smethod_0((ulong)this.uint_0, (uint)memoryStream.Length));
ulong num1 = (ulong)(memoryStream.Length + 8L - 1L & -8L);
int num2 = (int)((ulong)((long)num1 + (long)class7461.K - 1L) / (ulong)class7461.K);
byte[] data;
if (section.Encoding == 4UL)
{
data = new byte[(long)num2 * (long)class7461.N];
int num3 = (int)((long)num1 - memoryStream.Length);
for (int index = 0; index < num3; ++index)
{
memoryStream.WriteByte((byte)0);
fixed(byte *destination = data)
fixed(byte *source = memoryStream.GetBuffer())
this.method_28(destination, source, (int)memoryStream.Length, class7461);
}
else
{
if (section.Encoding != 1UL)
{
throw new Exception();
}
uint num3 = (uint)(num1 - (ulong)memoryStream.Length);
for (uint index = 0; index < num3; ++index)
{
memoryStream.WriteByte((byte)0);
}
data = new byte[num1 + (ulong)num2 * (ulong)(class7461.N - class7461.K)];
fixed(byte *dataBufferPtr = data)
fixed(byte *sourcePtr = memoryStream.GetBuffer())
this.method_26(dataBufferPtr, dataBufferPtr + num1, sourcePtr, (int)memoryStream.Length, class7461);
}
this.method_23((Class441)class443, data, 0, data.Length);
if (class443.Id > 0L)
{
++section.PageCount;
}
section.Pages.Add(class443);
}
private void method_0()
{
Class504 class504_1 = this.class504_0 = Class504.smethod_0("AcDb:FileDepList");
class504_1.HashCode = 1816266186UL;
if (this.dxfModel_0.FileDependencies.Count > 1)
{
int count = this.dxfModel_0.FileDependencies.Count;
class504_1.MaxDecompressedPageSize = (ulong)(128 * (count + (count >> 1)));
}
else
{
class504_1.MaxDecompressedPageSize = 256UL;
}
class504_1.Encrypted = 2UL;
class504_1.Encoding = 1UL;
this.list_0.Add(class504_1);
Class504 class504_2 = this.class504_1 = Class504.smethod_0("AcDb:AppInfo");
class504_2.HashCode = 1067451454UL;
class504_2.MaxDecompressedPageSize = 768UL;
class504_2.Encrypted = 0UL;
class504_2.Encoding = 1UL;
this.list_0.Add(class504_2);
Class504 class504_3 = this.class504_2 = Class504.smethod_0("AcDb:Preview");
class504_3.HashCode = 1084884083UL;
class504_3.MaxDecompressedPageSize = 1024UL;
class504_3.Encrypted = 0UL;
class504_3.Encoding = 1UL;
this.list_0.Add(class504_3);
Class504 class504_4 = this.class504_3 = Class504.smethod_0("AcDb:SummaryInfo");
class504_4.HashCode = 1903822351UL;
class504_4.MaxDecompressedPageSize = 128UL;
class504_4.Encrypted = 0UL;
class504_4.Encoding = 1UL;
this.list_0.Add(class504_4);
Class504 class504_5 = this.class504_4 = Class504.smethod_0("AcDb:RevHistory");
class504_5.HashCode = 1621231027UL;
class504_5.MaxDecompressedPageSize = 4096UL;
class504_5.Encrypted = 0UL;
class504_5.Encoding = 4UL;
class504_5.Compressed = true;
this.list_0.Add(class504_5);
Class504 class504_6 = this.class504_5 = Class504.smethod_0("AcDb:AcDbObjects");
class504_6.HashCode = 1733035433UL;
class504_6.MaxDecompressedPageSize = 63488UL;
class504_6.Encrypted = 0UL;
class504_6.Encoding = 4UL;
class504_6.Compressed = true;
this.list_0.Add(class504_6);
Class504 class504_7 = this.class504_6 = Class504.smethod_0("AcDb:ObjFreeSpace");
class504_7.HashCode = 2011301407UL;
class504_7.MaxDecompressedPageSize = 63488UL;
class504_7.Encrypted = 0UL;
class504_7.Encoding = 4UL;
class504_7.Compressed = true;
this.list_0.Add(class504_7);
Class504 class504_8 = this.class504_7 = Class504.smethod_0("AcDb:Template");
class504_8.HashCode = 1242825934UL;
class504_8.MaxDecompressedPageSize = 1024UL;
class504_8.Encrypted = 0UL;
class504_8.Encoding = 4UL;
class504_8.Compressed = true;
this.list_0.Add(class504_8);
Class504 class504_9 = this.class504_8 = Class504.smethod_0("AcDb:Handles");
class504_9.HashCode = 1064174672UL;
class504_9.MaxDecompressedPageSize = 63488UL;
class504_9.Encrypted = 0UL;
class504_9.Encoding = 4UL;
class504_9.Compressed = true;
this.list_0.Add(class504_9);
Class504 class504_10 = this.class504_9 = Class504.smethod_0("AcDb:Classes");
class504_10.HashCode = 1062470751UL;
class504_10.MaxDecompressedPageSize = 63488UL;
class504_10.Encrypted = 0UL;
class504_10.Encoding = 4UL;
class504_10.Compressed = true;
this.list_0.Add(class504_10);
Class504 class504_11 = this.class504_10 = Class504.smethod_0("AcDb:AuxHeader");
class504_11.HashCode = 1425016074UL;
class504_11.MaxDecompressedPageSize = 2048UL;
class504_11.Encrypted = 0UL;
class504_11.Encoding = 4UL;
class504_11.Compressed = true;
this.list_0.Add(class504_11);
Class504 class504_12 = this.class504_11 = Class504.smethod_0("AcDb:Header");
class504_12.HashCode = 850920409UL;
class504_12.MaxDecompressedPageSize = 2048UL;
class504_12.Encrypted = 0UL;
class504_12.Encoding = 4UL;
class504_12.Compressed = true;
this.list_0.Add(class504_12);
this.class954_0.SectionCount = (ulong)(this.list_0.Count + 1);
}