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);
}
protected void method_23(Class617 section, MemoryStream memoryStream, bool compress)
{
section.SectionSize = (ulong)memoryStream.Length;
section.Compressed = compress ? 2 : 1;
int decompressedPageSize = section.MaxDecompressedPageSize;
int num1 = (int)(memoryStream.Length / (long)decompressedPageSize);
byte[] buffer = memoryStream.GetBuffer();
ulong num2 = 0;
for (int index = 0; index < num1; ++index)
{
this.method_24(section, 1097008187, decompressedPageSize, buffer, num2, decompressedPageSize, compress);
num2 += (ulong)decompressedPageSize;
}
int uncompressedLength = (int)(memoryStream.Length % (long)decompressedPageSize);
if (uncompressedLength <= 0 || Class885.smethod_1(buffer, num2, (ulong)uncompressedLength))
{
return;
}
this.method_24(section, 1097008187, decompressedPageSize, buffer, num2, uncompressedLength, compress);
int num3 = num1 + 1;
}
private void method_24(
Class617 section,
int pageType,
int maxPageSize,
byte[] buffer,
ulong position,
int uncompressedLength,
bool compress)
{
MemoryStream memoryStream1 = new MemoryStream();
if (compress)
{
MemoryStream memoryStream2 = new MemoryStream(maxPageSize);
memoryStream2.Write(buffer, (int)position, uncompressedLength);
int num = maxPageSize - uncompressedLength;
for (int index = 0; index < num; ++index)
{
memoryStream2.WriteByte((byte)0);
}
new Class565().method_1(memoryStream2.GetBuffer(), 0, maxPageSize, (Stream)memoryStream1);
}
else
{
memoryStream1.Write(buffer, (int)position, uncompressedLength);
int num = maxPageSize - uncompressedLength;
for (int index = 0; index < num; ++index)
{
memoryStream1.WriteByte((byte)0);
}
}
this.method_27();
long position1 = this.stream_0.Position;
Class616 page = new Class616();
page.PageNumber = this.list_1.Count + 1;
page.StartOffset = position;
page.StreamOffset = position1;
page.DataChecksum = Class998.smethod_1(0U, memoryStream1.GetBuffer(), 0, (int)memoryStream1.Length);
uint dataChecksum = page.DataChecksum;
int count = Class998.smethod_0((int)memoryStream1.Length);
page.CompressedSize = (int)memoryStream1.Length;
page.DecompressedSize = uncompressedLength;
page.PageSize = page.CompressedSize + 32 + count;
page.HeaderChecksum = 0U;
MemoryStream memoryStream3 = new MemoryStream(32);
this.method_25((Stream)memoryStream3, section, page, pageType);
page.HeaderChecksum = Class998.smethod_1(dataChecksum, memoryStream3.GetBuffer(), 0, (int)memoryStream3.Length);
memoryStream3.SetLength(0L);
memoryStream3.Position = 0L;
this.method_25((Stream)memoryStream3, section, page, pageType);
this.method_26(memoryStream3.GetBuffer(), 0, (int)memoryStream3.Length);
this.stream_0.Write(memoryStream3.GetBuffer(), 0, (int)memoryStream3.Length);
this.stream_0.Write(memoryStream1.GetBuffer(), 0, (int)memoryStream1.Length);
if (compress)
{
this.stream_0.Write(Class998.byte_0, 0, count);
}
else if (count != 0)
{
throw new Exception();
}
if (page.PageNumber > 0)
{
++section.PageCount;
}
page.Length = this.stream_0.Position - position1;
section.Pages.Add(page);
this.list_1.Add((Class614)page);
}
