public static long Decompress(ClosableMemoryStream instream, long inLength, ref ClosableMemoryStream outstream)
{
long num = 0L;
byte num2 = (byte)instream.ReadByte();
byte[] buffer = new byte[3];
instream.Read(buffer, 0, 3);
int num3 = IOUtils.ToNDSu24(buffer, 0);
num += 4L;
if (num3 == 0)
{
buffer = new byte[4];
instream.Read(buffer, 0, 4);
num3 = IOUtils.ToNDSs32(buffer, 0);
num += 4L;
}
int num4 = 0x1000;
byte[] buffer2 = new byte[num4];
int index = 0;
int num6 = 0;
int num7 = 0;
int num8 = 1;
while (num6 < num3)
{
if (num8 == 1)
{
num7 = instream.ReadByte();
num += 1L;
num8 = 0x80;
}
else
{
num8 = num8 >> 1;
}
if ((num7 & num8) > 0)
{
int num12;
int num13;
int num9 = instream.ReadByte();
num += 1L;
int num10 = num9 >> 4;
int num11 = -1;
if (num10 == 0)
{
num12 = instream.ReadByte();
num += 1L;
num13 = instream.ReadByte();
num += 1L;
num10 = (((num9 & 15) << 4) | (num12 >> 4)) + 0x11;
num11 = (((num12 & 15) << 8) | num13) + 1;
}
else if (num10 == 1)
{
num12 = instream.ReadByte();
num += 1L;
num13 = instream.ReadByte();
num += 1L;
int num14 = instream.ReadByte();
num += 1L;
num10 = ((((num9 & 15) << 12) | (num12 << 4)) | (num13 >> 4)) + 0x111;
num11 = (((num13 & 15) << 8) | num14) + 1;
}
else
{
num12 = instream.ReadByte();
num += 1L;
num10 = ((num9 & 240) >> 4) + 1;
num11 = (((num9 & 15) << 8) | num12) + 1;
}
int num15 = (index + num4) - num11;
for (int i = 0; i < num10; i++)
{
byte num17 = buffer2[num15 % num4];
num15++;
outstream.WriteByte(num17);
buffer2[index] = num17;
index = (index + 1) % num4;
}
num6 += num10;
}
else
{
int num18 = instream.ReadByte();
num += 1L;
outstream = new ClosableMemoryStream();
outstream.WriteByte((byte)num18);
num6++;
buffer2[index] = (byte)num18;
index = (index + 1) % num4;
}
}
if (num < inLength)
{
}
return((long)num3);
}
public static long Decompress(ClosableMemoryStream instream, long inLength, ref ClosableMemoryStream outstream)
{
long num = 0L;
instream.Seek(0L, SeekOrigin.Begin);
byte num2 = (byte)instream.ReadByte();
byte[] buffer = new byte[3];
instream.Read(buffer, 0, 3);
int num3 = IOUtils.ToNDSu24(buffer, 0);
num += 4L;
if (num3 == 0)
{
buffer = new byte[4];
instream.Read(buffer, 0, 4);
num3 = IOUtils.ToNDSs32(buffer, 0);
num += 4L;
}
int num4 = 0x1000;
byte[] buffer2 = new byte[num4];
int index = 0;
int num6 = 0;
int num7 = 0;
int num8 = 1;
outstream = new ClosableMemoryStream();
while (num6 < num3)
{
if (num8 == 1)
{
num7 = instream.ReadByte();
num += 1L;
num8 = 0x80;
}
else
{
num8 = num8 >> 1;
}
if ((num7 & num8) > 0)
{
if (((num + 1L) >= inLength) && (num < inLength))
{
instream.ReadByte();
num += 1L;
}
int num9 = instream.ReadByte();
num += 1L;
int num10 = instream.ReadByte();
num += 1L;
int num11 = num9 >> 4;
num11 += 3;
int num12 = ((num9 & 15) << 8) | num10;
num12++;
int num13 = (index + num4) - num12;
for (int i = 0; i < num11; i++)
{
byte num15 = buffer2[num13 % num4];
num13++;
outstream.WriteByte(num15);
buffer2[index] = num15;
index = (index + 1) % num4;
}
num6 += num11;
}
else
{
int num16 = instream.ReadByte();
num += 1L;
num6++;
outstream.WriteByte((byte)num16);
buffer2[index] = (byte)num16;
index = (index + 1) % num4;
}
}
if (num < inLength)
{
}
return((long)num3);
}
