// Token: 0x06000598 RID: 1432 RVA: 0x00025518 File Offset: 0x00023718
private static Encoding GetEncoding(Class_178 container, string t)
{
switch (container.prop_14)
{
case Class_170.Default:
return(container.prop_13);
case Class_170.Always:
return(container.prop_12);
}
Encoding encoding = container.prop_13;
if (t == null)
{
return(encoding);
}
byte[] bytes = encoding.GetBytes(t);
string @string = encoding.GetString(bytes, 0, bytes.Length);
if (@string.Equals(t))
{
return(encoding);
}
return(container.prop_12);
}
// Token: 0x06000599 RID: 1433 RVA: 0x00025588 File Offset: 0x00023788
private static byte[] GenCentralDirectoryFooter(long StartOfCentralDirectory, long EndOfCentralDirectory, Class_169 zip64, int entryCount, string comment, Class_178 container)
{
Encoding encoding = Class_173.GetEncoding(container, comment);
int num = 22;
byte[] array = null;
short num2 = 0;
if (comment != null && comment.Length != 0)
{
array = encoding.GetBytes(comment);
num2 = (short)array.Length;
}
num += (int)num2;
byte[] array2 = new byte[num];
int num3 = 0;
byte[] bytes = BitConverter.GetBytes(101010256U);
Array.Copy(bytes, 0, array2, num3, 4);
num3 += 4;
array2[num3++] = 0;
array2[num3++] = 0;
array2[num3++] = 0;
array2[num3++] = 0;
if (entryCount >= 65535 || zip64 == Class_169.Always)
{
for (int i = 0; i < 4; i++)
{
array2[num3++] = byte.MaxValue;
}
}
else
{
array2[num3++] = (byte)(entryCount & 255);
array2[num3++] = (byte)((entryCount & 65280) >> 8);
array2[num3++] = (byte)(entryCount & 255);
array2[num3++] = (byte)((entryCount & 65280) >> 8);
}
long num4 = EndOfCentralDirectory - StartOfCentralDirectory;
if (num4 >= (long)((ulong)-1) || StartOfCentralDirectory >= (long)((ulong)-1))
{
for (int i = 0; i < 8; i++)
{
array2[num3++] = byte.MaxValue;
}
}
else
{
array2[num3++] = (byte)(num4 & 255L);
array2[num3++] = (byte)((num4 & 65280L) >> 8);
array2[num3++] = (byte)((num4 & 16711680L) >> 16);
array2[num3++] = (byte)((num4 & (long)((ulong)-16777216)) >> 24);
array2[num3++] = (byte)(StartOfCentralDirectory & 255L);
array2[num3++] = (byte)((StartOfCentralDirectory & 65280L) >> 8);
array2[num3++] = (byte)((StartOfCentralDirectory & 16711680L) >> 16);
array2[num3++] = (byte)((StartOfCentralDirectory & (long)((ulong)-16777216)) >> 24);
}
if (comment == null || comment.Length == 0)
{
array2[num3++] = 0;
array2[num3++] = 0;
}
else
{
if ((int)num2 + num3 + 2 > array2.Length)
{
num2 = (short)(array2.Length - num3 - 2);
}
array2[num3++] = (byte)(num2 & 255);
array2[num3++] = (byte)(((int)num2 & 65280) >> 8);
if (num2 != 0)
{
int i = 0;
while (i < (int)num2 && num3 + i < array2.Length)
{
array2[num3 + i] = array[i];
i++;
}
num3 += i;
}
}
return(array2);
}
// Token: 0x06000597 RID: 1431 RVA: 0x00025280 File Offset: 0x00023480
public static bool WriteCentralDirectoryStructure(Stream s, ICollection <Class_163> entries, uint numSegments, Class_169 zip64, string comment, Class_178 container)
{
Class_179 class_ = s as Class_179;
if (class_ != null)
{
class_.prop_0 = true;
}
long num = 0L;
using (MemoryStream memoryStream = new MemoryStream())
{
foreach (Class_163 class_2 in entries)
{
if (class_2.prop_34)
{
class_2.lmethod_718(memoryStream);
}
}
byte[] array = memoryStream.ToArray();
s.Write(array, 0, array.Length);
num = (long)array.Length;
}
Class_156 class_3 = s as Class_156;
long num2 = (class_3 != null) ? class_3.prop_7 : s.Position;
long num3 = num2 - num;
uint num4 = (class_ != null) ? class_.prop_1 : 0U;
long num5 = num2 - num3;
int num6 = Class_173.CountEntries(entries);
bool flag = zip64 == Class_169.Always || num6 >= 65535 || num5 > (long)((ulong)-1) || num3 > (long)((ulong)-1);
byte[] array3;
if (flag)
{
if (zip64 == Class_169.Default)
{
StackFrame stackFrame = new StackFrame(1);
if (stackFrame.GetMethod().DeclaringType == typeof(Class_168))
{
throw new Class_135("The archive requires a ZIP64 Central Directory. Consider setting the ZipFile.UseZip64WhenSaving property.");
}
throw new Class_135("The archive requires a ZIP64 Central Directory. Consider setting the ZipOutputStream.EnableZip64 property.");
}
else
{
byte[] array2 = Class_173.GenZip64EndOfCentralDirectory(num3, num2, num6, numSegments);
array3 = Class_173.GenCentralDirectoryFooter(num3, num2, zip64, num6, comment, container);
if (num4 != 0U)
{
uint value = class_.dmethod_1096(array2.Length + array3.Length);
int num7 = 16;
Array.Copy(BitConverter.GetBytes(value), 0, array2, num7, 4);
num7 += 4;
Array.Copy(BitConverter.GetBytes(value), 0, array2, num7, 4);
num7 = 60;
Array.Copy(BitConverter.GetBytes(value), 0, array2, num7, 4);
num7 += 4;
num7 += 8;
Array.Copy(BitConverter.GetBytes(value), 0, array2, num7, 4);
}
s.Write(array2, 0, array2.Length);
}
}
else
{
array3 = Class_173.GenCentralDirectoryFooter(num3, num2, zip64, num6, comment, container);
}
if (num4 != 0U)
{
ushort value2 = (ushort)class_.dmethod_1096(array3.Length);
int num8 = 4;
Array.Copy(BitConverter.GetBytes(value2), 0, array3, num8, 2);
num8 += 2;
Array.Copy(BitConverter.GetBytes(value2), 0, array3, num8, 2);
num8 += 2;
}
s.Write(array3, 0, array3.Length);
if (class_ != null)
{
class_.prop_0 = false;
}
return(flag);
}