private void method_1()
{
Class889 class889 = Class889.Create(this.stream_0, this.dxfVersion_0, this.encoding_0);
this.class564_0.Header2Offset = (ulong)this.stream_0.Position;
MemoryStream fileHeaderDataStream = new MemoryStream();
this.method_2(fileHeaderDataStream);
this.stream_0.Write(fileHeaderDataStream.GetBuffer(), 0, (int)fileHeaderDataStream.Length);
this.stream_0.Position = 0L;
this.stream_0.Write(Encodings.Ascii.GetBytes(this.dxfModel_0.Header.AcadVersionString), 0, 6);
this.stream_0.Write(new byte[5], 0, 5);
if (this.dxfModel_0.Header.AcadVersion == DxfVersion.Dxf18 && this.dxfModel_0.Header.AcadMaintenanceVersion == 1)
{
throw new DxfException("Header.AcadMaintenanceVersion may not be 1 for R18 files.");
}
this.stream_0.WriteByte((byte)this.dxfModel_0.Header.AcadMaintenanceVersion);
this.stream_0.WriteByte((byte)3);
class889.vmethod_11((uint)this.class617_5.Pages[0].StreamOffset + 32U);
this.stream_0.WriteByte((byte)Class885.smethod_3(DxfVersion.Dxf27));
this.stream_0.WriteByte((byte)8);
ushort num = Class952.smethod_1(this.dxfModel_0.Header.DrawingCodePage);
class889.vmethod_7(num);
this.stream_0.Write(new byte[3], 0, 3);
class889.vmethod_9((int)this.dxfModel_0.SecurityFlags);
class889.vmethod_9(0);
class889.vmethod_11((uint)this.class617_1.Pages[0].StreamOffset + 32U);
class889.vmethod_11(0U);
class889.vmethod_9(128);
class889.vmethod_11((uint)this.class617_6.Pages[0].StreamOffset + 32U);
this.stream_0.Write(new byte[80], 0, 80);
this.stream_0.Write(fileHeaderDataStream.GetBuffer(), 0, (int)fileHeaderDataStream.Length);
this.stream_0.Write(Class998.byte_0, 236, 20);
}
private void method_18()
{
this.method_27();
Class615 page = new Class615(1097010747);
this.method_19(page);
int pageSize = this.list_1.Count * 8;
page.StreamOffset = this.stream_0.Position;
int num = pageSize + Class998.smethod_0(pageSize);
page.Length = (long)num;
MemoryStream sectionStream = new MemoryStream();
Class889 class889 = Class889.Create((Stream)sectionStream, this.dxfVersion_0, this.encoding_0);
foreach (Class614 class614 in this.list_1)
{
if (class614 != null)
{
class889.vmethod_9(class614.PageNumber);
class889.vmethod_9((int)class614.Length);
}
}
this.method_21(page, sectionStream);
Class614 class614_1 = this.list_1[this.list_1.Count - 1];
this.class564_0.LastPageId = class614_1.PageNumber;
this.class564_0.LastPageEndOffset = (ulong)(class614_1.StreamOffset + (long)num - 256L);
this.class564_0.GapCount = 0U;
this.class564_0.PageCount = (uint)(this.list_1.Count - 1);
this.class564_0.PagesMapOffset = (ulong)page.StreamOffset;
}
private void method_14()
{
MemoryStream memoryStream = new MemoryStream();
Class612.Write(Class889.Create((Stream)memoryStream, this.dxfVersion_0, this.encoding_0), this.dxfModel_0, (uint)this.list_2.Count, 0U);
this.method_23(this.class617_10, memoryStream, true);
}
private void method_15()
{
MemoryStream memoryStream = new MemoryStream();
Class501.Write(Class889.Create((Stream)memoryStream, this.dxfVersion_0, this.encoding_0), this.dxfModel_0);
this.method_23(this.class617_11, memoryStream, true);
}
private void method_2()
{
Class889 class889 = Class889.Create(this.stream_0, this.dxfVersion_0, this.encoding_0);
this.stream_0.Position = 0L;
this.stream_0.Write(Encodings.Ascii.GetBytes(this.dxfModel_0.Header.AcadVersionString), 0, 6);
this.stream_0.Write(new byte[5], 0, 5);
int maintenanceVersion = this.dxfModel_0.Header.AcadMaintenanceVersion;
this.stream_0.WriteByte((byte)this.dxfModel_0.Header.AcadMaintenanceVersion);
this.stream_0.WriteByte((byte)3);
class889.vmethod_11((uint)this.class504_2.Pages[0].StreamOffset + 1152U);
this.stream_0.WriteByte((byte)Class885.smethod_3(DxfVersion.Dxf27));
this.stream_0.WriteByte((byte)8);
ushort num = Class952.smethod_1(this.dxfModel_0.Header.DrawingCodePage);
class889.vmethod_7(num);
this.stream_0.Write(new byte[3], 0, 3);
class889.vmethod_9((int)this.dxfModel_0.SecurityFlags);
class889.vmethod_9(0);
class889.vmethod_11((uint)this.class504_3.Pages[0].StreamOffset + 1152U);
class889.vmethod_11(0U);
class889.vmethod_9(128);
class889.vmethod_11((uint)this.class504_1.Pages[0].StreamOffset + 1152U);
for (int index = 0; index < 80; ++index)
{
this.stream_0.WriteByte((byte)0);
}
}
private void method_28()
{
MemoryStream memoryStream = new MemoryStream();
new Class741.Class742().Write(this.Model.method_13(), Class889.Create((Stream)memoryStream, this.Version, this.Encoding));
this.method_23(this.class617_13, memoryStream, true);
}
private void method_5()
{
this.class617_1.MaxDecompressedPageSize = 256;
MemoryStream memoryStream = new MemoryStream();
SummaryInfo summaryInfo = this.dxfModel_0.SummaryInfo;
Class611.Write(Class889.Create((Stream)memoryStream, this.dxfVersion_0, this.encoding_0), summaryInfo);
this.method_23(this.class617_1, memoryStream, false);
}
private void method_11()
{
Class889 class889 = Class889.Create((Stream)this.class504_4.Stream, this.dxfVersion_0, this.encoding_0);
class889.vmethod_11(0U);
class889.vmethod_11(0U);
class889.vmethod_11(1U);
class889.vmethod_11(0U);
}
private void method_12()
{
MemoryStream memoryStream = new MemoryStream();
Class889 class889 = Class889.Create((Stream)memoryStream, this.dxfVersion_0, this.encoding_0);
class889.vmethod_11(0U);
class889.vmethod_11(0U);
class889.vmethod_11(0U);
this.method_23(this.class617_8, memoryStream, true);
}
private void method_22(Class615 page, Stream sectionHeaderStream)
{
Class889 class889 = Class889.Create(sectionHeaderStream, this.dxfVersion_0, this.encoding_0);
class889.vmethod_9(page.SectionPageType);
class889.vmethod_9(page.DecompressedSize);
class889.vmethod_9(page.CompressedSize);
class889.vmethod_9(page.CompressionType);
class889.vmethod_11(page.Checksum);
}
private void method_11()
{
this.class617_7.MaxDecompressedPageSize = 128;
FileDependencyCollection dependencyCollection = new FileDependencyCollection();
if (dependencyCollection.Count > 1)
{
this.class617_7.MaxDecompressedPageSize = 128 * dependencyCollection.Count;
}
this.class617_7.Encrypted = 2;
MemoryStream memoryStream = new MemoryStream();
Class889 class889 = Class889.Create((Stream)memoryStream, this.dxfVersion_0, this.encoding_0);
List <string> stringList = new List <string>();
foreach (FileDependency.Key key in dependencyCollection.Keys)
{
if (!stringList.Contains(key.FeatureName))
{
stringList.Add(key.FeatureName);
}
}
class889.vmethod_9(stringList.Count);
foreach (string str in stringList)
{
class889.vmethod_22(str);
}
class889.vmethod_9(dependencyCollection.Count);
DateTime dateTime = new DateTime(1980, 1, 1);
foreach (FileDependency.Key key in dependencyCollection.Keys)
{
FileDependency fileDependency = dependencyCollection[key];
if (fileDependency.FeatureName == "Acad:Text")
{
string str = DxfTextStyle.smethod_2(Class1043.smethod_2(this.dxfModel_0.Filename), fileDependency.FullFilename);
if (!string.IsNullOrEmpty(str) && File.Exists(str))
{
FileInfo fileInfo = new FileInfo(str);
fileDependency.TimeStamp = fileInfo.LastWriteTime;
fileDependency.FileSize = (int)fileInfo.Length;
}
}
class889.vmethod_22(fileDependency.FullFilename);
class889.vmethod_22(fileDependency.FoundPath);
class889.vmethod_22(fileDependency.FingerPrintGuid);
class889.vmethod_22(fileDependency.VersionGuid);
class889.vmethod_9(stringList.IndexOf(fileDependency.FeatureName));
TimeSpan timeSpan = fileDependency.TimeStamp - dateTime;
class889.vmethod_9((int)timeSpan.TotalSeconds);
class889.vmethod_9(fileDependency.FileSize);
class889.vmethod_5(fileDependency.AffectsGraphics ? (short)1 : (short)0);
class889.vmethod_9(fileDependency.References.Count);
}
this.method_23(this.class617_7, memoryStream, false);
}
private void method_25(Stream pageHeaderStream, Class617 section, Class616 page, int pageType)
{
Class889 class889 = Class889.Create(pageHeaderStream, this.dxfVersion_0, this.encoding_0);
class889.vmethod_9(pageType);
class889.vmethod_9(section.SectionId);
class889.vmethod_9(page.CompressedSize);
class889.vmethod_9(page.PageSize);
class889.vmethod_13((long)page.StartOffset);
class889.vmethod_11(page.HeaderChecksum);
class889.vmethod_11(page.DataChecksum);
}
private void method_17()
{
MemoryStream sectionStream = new MemoryStream();
Class889 class889 = Class889.Create((Stream)sectionStream, this.dxfVersion_0, this.encoding_0);
class889.vmethod_9(this.list_0.Count);
class889.vmethod_9(2);
class889.vmethod_9(29696);
class889.vmethod_9(0);
class889.vmethod_9(this.list_0.Count);
foreach (Class617 class617 in this.list_0)
{
class889.vmethod_15(class617.SectionSize);
class889.vmethod_9(class617.PageCount);
class889.vmethod_9(class617.MaxDecompressedPageSize);
class889.vmethod_9(1);
class889.vmethod_9(class617.Compressed);
class889.vmethod_9(class617.SectionId);
class889.vmethod_9(class617.Encrypted);
byte[] buffer = new byte[64];
if (!string.IsNullOrEmpty(class617.Name))
{
byte[] bytes = Encodings.Ascii.GetBytes(class617.Name);
int num = Math.Min(bytes.Length, buffer.Length);
for (int index = 0; index < num; ++index)
{
buffer[index] = bytes[index];
}
}
sectionStream.Write(buffer, 0, buffer.Length);
foreach (Class616 page in class617.Pages)
{
if (page.PageNumber > 0)
{
class889.vmethod_9(page.PageNumber);
class889.vmethod_9(page.CompressedSize);
class889.vmethod_15(page.StartOffset);
}
}
}
Class615 page1 = this.method_20(1097007163, sectionStream);
int count = Class998.smethod_0((int)(this.stream_0.Position - page1.StreamOffset));
this.stream_0.Write(Class998.byte_0, 0, count);
page1.Length = this.stream_0.Position - page1.StreamOffset;
this.method_19(page1);
}
private void method_16()
{
MemoryStream sectionStream = new MemoryStream();
Class889 byteStream = Class889.Create((Stream)sectionStream, this.dxfVersion_0, this.encoding_0);
foreach (Class504 section in this.list_0)
{
if (section.DataSize != 0UL)
{
this.method_17(section, byteStream);
}
}
if (this.dxfVersion_0 == DxfVersion.Dxf21)
{
this.method_17(new Class504()
{
HashCode = 0UL,
MaxDecompressedPageSize = 63488UL,
Encrypted = 0UL,
Encoding = 4UL
}, byteStream);
}
Class442 page = new Class442();
ulong pageSize = Class996.smethod_2((ulong)sectionStream.Length);
byte[] pageData;
this.method_20(page, sectionStream, this.class954_0.SectionsMapCrcSeed, pageSize, out pageData);
Class442 class442 = (Class442)page.Clone();
this.method_23((Class441)page, pageData, 0, pageData.Length);
this.method_23((Class441)class442, pageData, 0, pageData.Length);
this.class954_0.SectionsMapDataRepeatCount = page.DataRepeatCount;
this.class954_0.SectionsMapSizeCompressed = page.CompressedSize;
this.class954_0.SectionsMapSizeDecompressed = page.DecompressedSize;
this.class954_0.SectionsMapCrcCompressed = page.CompressedCrc;
this.class954_0.SectionsMapCrcDecompressed = page.DecompressedCrc;
this.class954_0.SectionsMapId = (ulong)page.Id;
this.class954_0.SectionsMap2Id = (ulong)class442.Id;
}
private void method_2(MemoryStream fileHeaderDataStream)
{
Stream2 stream2 = new Stream2((Stream)fileHeaderDataStream, 0U);
Class889 class889 = Class889.Create((Stream)stream2, this.dxfVersion_0, this.encoding_0);
byte[] bytes = Class1045.encoding_0.GetBytes("AcFssFcAJMB");
stream2.Write(bytes, 0, 11);
stream2.WriteByte((byte)0);
class889.vmethod_9(0);
class889.vmethod_9(108);
class889.vmethod_9(4);
class889.vmethod_9(this.class564_0.GapsRootId);
class889.vmethod_9(this.class564_0.GapsLeftId);
class889.vmethod_9(this.class564_0.GapsRightId);
class889.vmethod_9(this.class564_0.GapsUnknown);
class889.vmethod_9(this.class564_0.LastPageId);
class889.vmethod_15(this.class564_0.LastPageEndOffset);
class889.vmethod_15(this.class564_0.Header2Offset);
class889.vmethod_11(this.class564_0.GapCount);
class889.vmethod_11(this.class564_0.PageCount);
class889.vmethod_9(32);
class889.vmethod_9(128);
class889.vmethod_9(64);
class889.vmethod_11(this.class564_0.PagesMapId);
class889.vmethod_15(this.class564_0.PagesMapOffset - 256UL);
class889.vmethod_11(this.class564_0.SectionsMapId);
class889.vmethod_11(this.class564_0.PagesMaxId);
class889.vmethod_11(this.class564_0.GapsMaxId);
long position = stream2.Position;
class889.vmethod_11(0U);
uint crc = stream2.Crc;
stream2.Position = position;
class889.vmethod_11(crc);
stream2.Flush();
this.method_3(fileHeaderDataStream);
}
private void method_5()
{
this.memoryStream_7 = new MemoryStream();
Class501.Write(Class889.Create((Stream)this.memoryStream_7, this.dxfVersion_0, this.encoding_0), this.dxfModel_0);
this.class723_6.Stream = this.memoryStream_7;
}
private void method_5()
{
this.memoryStream_2 = new MemoryStream();
Class501.Write(Class889.Create((Stream)this.memoryStream_2, this.dxfVersion_0, this.encoding_0), this.dxfModel_0);
}
private void method_4()
{
Class611.Write(Class889.Create((Stream)this.class504_3.Stream, this.dxfVersion_0, this.encoding_0), this.dxfModel_0.SummaryInfo);
}
private unsafe void method_1()
{
this.stream_0.Position = this.stream_0.Length;
this.class954_0.FileSize = (ulong)(this.stream_0.Length + 1024L);
this.class954_0.Header2Offset = (ulong)(this.stream_0.Position - 1152L);
this.class954_0.SectionsMapCrcSeed = this.class995_0.method_2((uint)this.class954_0.SectionsMapCrcSeed);
this.class954_0.PagesMapCrcSeed = this.class995_0.method_2((uint)this.class954_0.PagesMapCrcSeed);
Class888 class888 = new Class888();
class888.method_0(this.class954_0.CrcSeed, this.class995_0);
this.class954_0.CrcSeedEncoded = this.class995_0.method_2((uint)(this.class954_0.CrcSeed & (ulong)ushort.MaxValue));
MemoryStream memoryStream1 = new MemoryStream();
Class889 byteStream = Class889.Create((Stream)memoryStream1, this.dxfVersion_0, this.encoding_0);
this.method_3(byteStream);
ulong num1 = Class656.class656_0.method_0(memoryStream1.GetBuffer(), 0U, (uint)memoryStream1.Length, Class656.smethod_1(0UL, (uint)memoryStream1.Length));
memoryStream1.Position = 264L;
byteStream.vmethod_15(num1);
Class955 class955 = new Class955();
MemoryStream memoryStream2 = new MemoryStream();
class955.method_1(memoryStream1.GetBuffer(), 0, (int)memoryStream1.Length, (Stream)memoryStream2);
if (memoryStream2.Length >= memoryStream1.Length)
{
memoryStream2 = memoryStream1;
}
ulong num2 = Class656.class656_0.method_0(memoryStream2.GetBuffer(), 0U, (uint)memoryStream2.Length, Class656.smethod_1(0UL, (uint)memoryStream2.Length));
MemoryStream memoryStream3 = new MemoryStream(12);
Class889 class889_1 = Class889.Create((Stream)memoryStream3, this.dxfVersion_0, this.encoding_0);
ulong control = this.class995_0.method_1();
class889_1.vmethod_15(control);
class889_1.vmethod_15(Class888.smethod_0(control, control));
ulong num3 = Class656.class656_0.method_0(memoryStream3.GetBuffer(), 0U, (uint)memoryStream3.Length, Class656.smethod_0(0UL, (uint)memoryStream3.Length));
MemoryStream memoryStream4 = new MemoryStream(1024);
Class889 class889_2 = Class889.Create((Stream)memoryStream4, this.dxfVersion_0, this.encoding_0);
class889_2.vmethod_15(num3);
class889_2.vmethod_15(control);
class889_2.vmethod_15(num2);
if (memoryStream2.Length < 272L)
{
class889_2.vmethod_13(memoryStream2.Length);
}
else
{
if (memoryStream2.Length != 272L)
{
throw new Exception();
}
class889_2.vmethod_13(-272L);
}
memoryStream4.Write(memoryStream2.GetBuffer(), 0, (int)memoryStream2.Length);
uint num4 = Class746.class746_0.K * 3U;
uint length = (uint)class889_2.Stream.Length;
uint num5 = (uint)((ulong)(uint)((int)length + 8 - 1) & 18446744073709551608UL);
uint paddingSize1 = num5 - length;
this.method_25((Stream)memoryStream4, paddingSize1);
uint num6 = num4 / num5;
for (int index = 1; (long)index < (long)num6; ++index)
{
memoryStream4.Write(memoryStream4.GetBuffer(), 0, (int)num5);
}
uint paddingSize2 = num4 - (uint)memoryStream4.Length;
this.method_25((Stream)memoryStream4, paddingSize2);
byte[] buffer = new byte[1024];
fixed(byte *source = memoryStream4.GetBuffer())
fixed(byte *destination = buffer)
{
this.method_28(destination, source, (int)num4, Class746.class746_0);
this.method_24(destination + 765, 259U);
}
MemoryStream memoryStream5 = new MemoryStream(buffer, true);
memoryStream5.Position = memoryStream5.Length - 40L;
class888.Write((Stream)memoryStream5);
if (memoryStream5.Length != 1024L)
{
throw new Exception();
}
this.stream_0.Write(buffer, 0, buffer.Length);
this.stream_0.Position = 128L;
this.stream_0.Write(buffer, 0, buffer.Length);
}
private void method_9()
{
Class889.Create((Stream)this.class504_1.Stream, this.dxfVersion_0, this.encoding_0);
Class885.smethod_0(new Class949(), (Stream)this.class504_1.Stream, this.encoding_0);
}
private void method_13()
{
Class612.Write(Class889.Create((Stream)this.class504_6.Stream, this.dxfVersion_0, this.encoding_0), this.dxfModel_0, (uint)this.list_2.Count, 0U);
}
private void method_14()
{
Class501.Write(Class889.Create((Stream)this.class504_7.Stream, this.dxfVersion_0, this.encoding_0), this.dxfModel_0);
}
private void method_18()
{
this.class442_0.StreamOffset = 0UL;
ulong pageSize = this.method_19(this.list_1.Count);
long num1 = (long)(this.list_1.Count + 1 + 2);
if (pageSize <= 1024UL)
{
Class441 class441 = this.list_1[0];
long num2 = num1;
long num3 = num2 + 1L;
class441.Id = num2;
this.list_1[1].Id = num3;
this.class954_0.PagesMapId = (ulong)this.list_1[0].Id;
this.class954_0.PagesMapOffset = this.list_1[0].StreamOffset;
this.class954_0.PagesMap2Id = (ulong)this.list_1[1].Id;
this.class954_0.PagesMap2Offset = this.list_1[1].StreamOffset;
}
else
{
Class441 class441_1 = this.list_1[0];
long num2 = num1;
long num3 = num2 + 1L;
long num4 = -num2;
class441_1.Id = num4;
Class441 class441_2 = this.list_1[1];
long num5 = num3;
long num6 = num5 + 1L;
long num7 = -num5;
class441_2.Id = num7;
uint num8 = (uint)(this.stream_0.Position - 1152L);
Class442 class442_1 = new Class442();
Class442 class442_2 = class442_1;
long num9 = num6;
long num10 = num9 + 1L;
class442_2.Id = num9;
class442_1.StreamOffset = (ulong)(num8 - 1152U);
this.list_1.Add((Class441)class442_1);
Class442 class442_3 = new Class442();
class442_3.Id = num10;
class442_3.StreamOffset = (ulong)((long)num8 + (long)pageSize - 1152L);
this.list_1.Add((Class441)class442_3);
}
this.class954_0.PagesMaxId = 0UL;
this.class954_0.PageCount = (ulong)(uint)this.list_1.Count;
this.class954_0.PagesMapOffset = this.class442_0.StreamOffset;
MemoryStream sectionStream = new MemoryStream();
Class889 class889 = Class889.Create((Stream)sectionStream, this.dxfVersion_0, this.encoding_0);
foreach (Class441 class441 in this.list_1)
{
if (class441 != null)
{
class889.vmethod_13(class441.Length);
class889.vmethod_13(class441.Id);
if (class441.Id > (long)this.class954_0.PagesMaxId)
{
this.class954_0.PagesMaxId = (ulong)class441.Id;
}
}
}
byte[] pageData;
this.method_20(this.class442_0, sectionStream, this.class954_0.PagesMapCrcSeed, pageSize, out pageData);
this.class442_0.Length = (long)pageData.Length;
long id = this.class442_1.Id;
this.class442_1.CopyFrom(this.class442_0);
this.class442_1.Id = id;
this.class442_1.StreamOffset = 1024UL;
this.stream_0.Position = (long)this.class954_0.PagesMapOffset + 1152L;
this.stream_0.Write(pageData, 0, pageData.Length);
this.stream_0.Position = (long)this.class954_0.PagesMap2Offset + 1152L;
this.stream_0.Write(pageData, 0, pageData.Length);
this.class954_0.PagesMapDataRepeatCount = this.class442_0.DataRepeatCount;
this.class954_0.PagesMapSizeCompressed = this.class442_0.CompressedSize;
this.class954_0.PagesMapSizeDecompressed = this.class442_0.DecompressedSize;
this.class954_0.PagesMapCrcCompressed = this.class442_0.CompressedCrc;
this.class954_0.PagesMapCrcDecompressed = this.class442_0.DecompressedCrc;
}
public static void smethod_0(Class949 appInfo, Stream stream, Encoding encoding)
{
Class889 byteStream = Class889.Create(stream, DxfVersion.Dxf21, Encoding.Unicode);
Class921.smethod_0(appInfo, byteStream);
}