public static void Create(byte[] oldData, byte[] newData, Stream output)
{
if (oldData == null)
{
throw new ArgumentNullException("oldData");
}
if (newData == null)
{
throw new ArgumentNullException("newData");
}
if (output == null)
{
throw new ArgumentNullException("output");
}
if (!output.get_CanSeek())
{
throw new ArgumentException("Output stream must be seekable.", "output");
}
if (!output.get_CanWrite())
{
throw new ArgumentException("Output stream must be writable.", "output");
}
byte[] array = new byte[32];
BinaryPatchUtility.WriteInt64(3473478480300364610L, array, 0);
BinaryPatchUtility.WriteInt64(0L, array, 8);
BinaryPatchUtility.WriteInt64(0L, array, 16);
BinaryPatchUtility.WriteInt64((long)newData.Length, array, 24);
long position = output.get_Position();
output.Write(array, 0, array.Length);
int[] i = BinaryPatchUtility.SuffixSort(oldData);
byte[] array2 = new byte[newData.Length];
byte[] array3 = new byte[newData.Length];
int num = 0;
int num2 = 0;
BZip2OutputStream bZip2OutputStream = new BZip2OutputStream(output);
bZip2OutputStream.set_IsStreamOwner(false);
using (BZip2OutputStream bZip2OutputStream2 = bZip2OutputStream)
{
int j = 0;
int num3 = 0;
int num4 = 0;
int num5 = 0;
int num6 = 0;
int num7 = 0;
while (j < newData.Length)
{
int num8 = 0;
int k;
for (j = (k = j + num4); j < newData.Length; j++)
{
num4 = BinaryPatchUtility.Search(i, oldData, newData, j, 0, oldData.Length, out num3);
while (k < j + num4)
{
if (k + num7 < oldData.Length && oldData[k + num7] == newData[k])
{
num8++;
}
k++;
}
if ((num4 == num8 && num4 != 0) || num4 > num8 + 8)
{
break;
}
if (j + num7 < oldData.Length && oldData[j + num7] == newData[j])
{
num8--;
}
}
if (num4 != num8 || j == newData.Length)
{
int num9 = 0;
int num10 = 0;
int num11 = 0;
int num12 = 0;
while (num5 + num12 < j && num6 + num12 < oldData.Length)
{
if (oldData[num6 + num12] == newData[num5 + num12])
{
num9++;
}
num12++;
if (num9 * 2 - num12 > num10 * 2 - num11)
{
num10 = num9;
num11 = num12;
}
}
int num13 = 0;
if (j < newData.Length)
{
num9 = 0;
int num14 = 0;
int num15 = 1;
while (j >= num5 + num15 && num3 >= num15)
{
if (oldData[num3 - num15] == newData[j - num15])
{
num9++;
}
if (num9 * 2 - num15 > num14 * 2 - num13)
{
num14 = num9;
num13 = num15;
}
num15++;
}
}
if (num5 + num11 > j - num13)
{
int num16 = num5 + num11 - (j - num13);
num9 = 0;
int num17 = 0;
int num18 = 0;
for (int l = 0; l < num16; l++)
{
if (newData[num5 + num11 - num16 + l] == oldData[num6 + num11 - num16 + l])
{
num9++;
}
if (newData[j - num13 + l] == oldData[num3 - num13 + l])
{
num9--;
}
if (num9 > num17)
{
num17 = num9;
num18 = l + 1;
}
}
num11 += num18 - num16;
num13 -= num18;
}
for (int m = 0; m < num11; m++)
{
array2[num + m] = newData[num5 + m] - oldData[num6 + m];
}
for (int n = 0; n < j - num13 - (num5 + num11); n++)
{
array3[num2 + n] = newData[num5 + num11 + n];
}
num += num11;
num2 += j - num13 - (num5 + num11);
byte[] array4 = new byte[8];
BinaryPatchUtility.WriteInt64((long)num11, array4, 0);
bZip2OutputStream2.Write(array4, 0, 8);
BinaryPatchUtility.WriteInt64((long)(j - num13 - (num5 + num11)), array4, 0);
bZip2OutputStream2.Write(array4, 0, 8);
BinaryPatchUtility.WriteInt64((long)(num3 - num13 - (num6 + num11)), array4, 0);
bZip2OutputStream2.Write(array4, 0, 8);
num5 = j - num13;
num6 = num3 - num13;
num7 = num3 - j;
}
}
}
long position2 = output.get_Position();
BinaryPatchUtility.WriteInt64(position2 - position - 32L, array, 8);
bZip2OutputStream = new BZip2OutputStream(output);
bZip2OutputStream.set_IsStreamOwner(false);
using (BZip2OutputStream bZip2OutputStream3 = bZip2OutputStream)
{
bZip2OutputStream3.Write(array2, 0, num);
}
long position3 = output.get_Position();
BinaryPatchUtility.WriteInt64(position3 - position2, array, 16);
bZip2OutputStream = new BZip2OutputStream(output);
bZip2OutputStream.set_IsStreamOwner(false);
using (BZip2OutputStream bZip2OutputStream4 = bZip2OutputStream)
{
bZip2OutputStream4.Write(array3, 0, num2);
}
long position4 = output.get_Position();
output.set_Position(position);
output.Write(array, 0, array.Length);
output.set_Position(position4);
}