Initial commit of lightweight Lucene.Net to be used in Mono

1 files changed, 79 insertions, 0 deletions

diff --git a/src/core/Index/IntBlockPool.cs b/src/core/Index/IntBlockPool.cs
new file mode 100644
index 0000000..5fbee30
--- /dev/null
+++ b/src/core/Index/IntBlockPool.cs
@@ -0,0 +1,79 @@
+/* 
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ * 
+ * http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+using System;
+
+namespace Lucene.Net.Index
+{
+	
+	sealed class IntBlockPool
+	{
+		private void  InitBlock()
+		{
+			intUpto = DocumentsWriter.INT_BLOCK_SIZE;
+		}
+		
+		public int[][] buffers = new int[10][];
+		
+		internal int bufferUpto = - 1; // Which buffer we are upto
+		public int intUpto; // Where we are in head buffer
+		
+		public int[] buffer; // Current head buffer
+		public int intOffset = - DocumentsWriter.INT_BLOCK_SIZE; // Current head offset
+		
+		private DocumentsWriter docWriter;
+		internal bool trackAllocations;
+		
+		public IntBlockPool(DocumentsWriter docWriter, bool trackAllocations)
+		{
+			InitBlock();
+			this.docWriter = docWriter;
+			this.trackAllocations = trackAllocations;
+		}
+		
+		public void  Reset()
+		{
+			if (bufferUpto != - 1)
+			{
+				if (bufferUpto > 0)
+				// Recycle all but the first buffer
+					docWriter.RecycleIntBlocks(buffers, 1, 1 + bufferUpto);
+				
+				// Reuse first buffer
+				bufferUpto = 0;
+				intUpto = 0;
+				intOffset = 0;
+				buffer = buffers[0];
+			}
+		}
+		
+		public void  NextBuffer()
+		{
+			if (1 + bufferUpto == buffers.Length)
+			{
+				int[][] newBuffers = new int[(int) (buffers.Length * 1.5)][];
+				Array.Copy(buffers, 0, newBuffers, 0, buffers.Length);
+				buffers = newBuffers;
+			}
+			buffer = buffers[1 + bufferUpto] = docWriter.GetIntBlock(trackAllocations);
+			bufferUpto++;
+			
+			intUpto = 0;
+			intOffset += DocumentsWriter.INT_BLOCK_SIZE;
+		}
+	}
+}
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