Lucene.Net.Store.MMapDirectory.MultiMMapIndexInput.MultiMMapIndexInput C# (CSharp) Method

			public MultiMMapIndexInput(MMapDirectory enclosingInstance, System.IO.FileStream raf, int maxBufSize)
			{
				InitBlock(enclosingInstance);
				this.length = raf.Length;
				this.maxBufSize = maxBufSize;
				
				if (maxBufSize <= 0)
					throw new System.ArgumentException("Non positive maxBufSize: " + maxBufSize);
				
				if ((length / maxBufSize) > System.Int32.MaxValue)
				{
					throw new System.ArgumentException("RandomAccessFile too big for maximum buffer size: " + raf.ToString());
				}
				
				int nrBuffers = (int) (length / maxBufSize);
				if (((long) nrBuffers * maxBufSize) < length)
					nrBuffers++;
				
				this.buffers = new System.IO.MemoryStream[nrBuffers];
				this.bufSizes = new int[nrBuffers];
				
				long bufferStart = 0;
				System.IO.FileStream rafc = raf;
				for (int bufNr = 0; bufNr < nrBuffers; bufNr++)
				{
                    byte[] data = new byte[rafc.Length];
                    raf.Read(data, 0, (int) rafc.Length);

					int bufSize = (length > (bufferStart + maxBufSize))?maxBufSize:(int) (length - bufferStart);
					this.buffers[bufNr] = new System.IO.MemoryStream(data);
					this.bufSizes[bufNr] = bufSize;
					bufferStart += bufSize;
				}
				Seek(0L);
			}