public override long Seek(long offset, SeekOrigin origin)
{
if (!this.m_Compressed)
{
return(this.RawStream.Seek(offset, origin));
}
long num = offset;
if (origin == SeekOrigin.Current)
{
num += this.m_Uncomp.Position;
}
if (num < 0L)
{
throw new Exception("Cannot seek past the begining of the stream.");
}
long position = this.m_Uncomp.Position;
this.m_Uncomp.Seek(0L, SeekOrigin.End);
while ((origin == SeekOrigin.End || num >= this.m_Uncomp.Length) && this.RawStream.Position < this.RawStream.Length)
{
int count1 = this.Raw.ReadInt32();
int count2 = this.Raw.ReadInt32();
if (GZBlockIn.m_ReadBuff == null || GZBlockIn.m_ReadBuff.Length < count1)
{
GZBlockIn.m_ReadBuff = new byte[count1];
}
if (GZBlockIn.m_CompBuff == null || GZBlockIn.m_CompBuff.Length < count2)
{
GZBlockIn.m_CompBuff = new byte[count2];
}
else
{
count2 = GZBlockIn.m_CompBuff.Length;
}
this.Raw.Read(GZBlockIn.m_ReadBuff, 0, count1);
Z_RESULT zResult = ZLib.Decompress(GZBlockIn.m_CompBuff, ref count2, GZBlockIn.m_ReadBuff, count1);
if (zResult != null)
{
throw new Exception("ZLib error uncompressing: " + ((object)zResult).ToString());
}
this.m_Uncomp.Write(GZBlockIn.m_CompBuff, 0, count2);
}
this.m_Uncomp.Position = position;
return(this.m_Uncomp.Seek(offset, origin));
}
public override int Read(byte[] buffer, int offset, int count)
{
if (!this.m_Compressed)
{
return(this.RawStream.Read(buffer, offset, count));
}
long position = this.m_Uncomp.Position;
this.m_Uncomp.Seek(0L, SeekOrigin.End);
while (position + (long)count > this.m_Uncomp.Length && this.RawStream.Position + 8L < this.RawStream.Length)
{
int count1 = this.Raw.ReadInt32();
int count2 = this.Raw.ReadInt32();
if (count1 <= 268435456 && count1 > 0 && (count2 <= 268435456 && count2 > 0) && this.RawStream.Position + (long)count1 <= this.RawStream.Length)
{
if (GZBlockIn.m_ReadBuff == null || GZBlockIn.m_ReadBuff.Length < count1)
{
GZBlockIn.m_ReadBuff = new byte[count1];
}
if (GZBlockIn.m_CompBuff == null || GZBlockIn.m_CompBuff.Length < count2)
{
GZBlockIn.m_CompBuff = new byte[count2];
}
else
{
count2 = GZBlockIn.m_CompBuff.Length;
}
this.Raw.Read(GZBlockIn.m_ReadBuff, 0, count1);
Z_RESULT zResult = ZLib.Decompress(GZBlockIn.m_CompBuff, ref count2, GZBlockIn.m_ReadBuff, count1);
if (zResult != null)
{
throw new Exception("ZLib error uncompressing: " + ((object)zResult).ToString());
}
this.m_Uncomp.Write(GZBlockIn.m_CompBuff, 0, count2);
}
else
{
break;
}
}
this.m_Uncomp.Position = position;
return(this.m_Uncomp.Read(buffer, offset, count));
}
