System.util.zlib.Inflate.inflateSync C# (CSharp) Méthode

        internal int inflateSync(ZStream z)
        {
            int n;       // number of bytes to look at
            int p;       // pointer to bytes
            int m;       // number of marker bytes found in a row
            long r, w;   // temporaries to save total_in and total_out

            // set up
            if(z == null || z.istate == null)
                return Z_STREAM_ERROR;
            if(z.istate.mode != BAD){
                z.istate.mode = BAD;
                z.istate.marker = 0;
            }
            if((n=z.avail_in)==0)
                return Z_BUF_ERROR;
            p=z.next_in_index;
            m=z.istate.marker;

            // search
            while (n!=0 && m < 4){
                if(z.next_in[p] == mark[m]){
                    m++;
                }
                else if(z.next_in[p]!=0){
                    m = 0;
                }
                else{
                    m = 4 - m;
                }
                p++; n--;
            }

            // restore
            z.total_in += p-z.next_in_index;
            z.next_in_index = p;
            z.avail_in = n;
            z.istate.marker = m;

            // return no joy or set up to restart on a new block
            if(m != 4){
                return Z_DATA_ERROR;
            }
            r=z.total_in;  w=z.total_out;
            inflateReset(z);
            z.total_in=r;  z.total_out = w;
            z.istate.mode = BLOCKS;
            return Z_OK;
        }

 public int inflateSync()
 {
     if (istate == null)
     {
         return(Z_STREAM_ERROR);
     }
     return(istate.inflateSync(this));
 }