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-rw-r--r--runtime/CSharp3/Sources/Antlr3.Runtime/Misc/FastQueue.cs143
1 files changed, 0 insertions, 143 deletions
diff --git a/runtime/CSharp3/Sources/Antlr3.Runtime/Misc/FastQueue.cs b/runtime/CSharp3/Sources/Antlr3.Runtime/Misc/FastQueue.cs
deleted file mode 100644
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--- a/runtime/CSharp3/Sources/Antlr3.Runtime/Misc/FastQueue.cs
+++ /dev/null
@@ -1,143 +0,0 @@
-/*
- * [The "BSD licence"]
- * Copyright (c) 2005-2008 Terence Parr
- * All rights reserved.
- *
- * Conversion to C#:
- * Copyright (c) 2008-2009 Sam Harwell, Pixel Mine, Inc.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. The name of the author may not be used to endorse or promote products
- * derived from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
- * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
- * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
- * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
- * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-namespace Antlr.Runtime.Misc
-{
- using System.Collections.Generic;
- using ArgumentException = System.ArgumentException;
- using InvalidOperationException = System.InvalidOperationException;
-
- /** A queue that can dequeue and get(i) in O(1) and grow arbitrarily large.
- * A linked list is fast at dequeue but slow at get(i). An array is
- * the reverse. This is O(1) for both operations.
- *
- * List grows until you dequeue last element at end of buffer. Then
- * it resets to start filling at 0 again. If adds/removes are balanced, the
- * buffer will not grow too large.
- *
- * No iterator stuff as that's not how we'll use it.
- */
- public class FastQueue<T>
- {
- /** <summary>dynamically-sized buffer of elements</summary> */
- internal List<T> _data = new List<T>();
- /** <summary>index of next element to fill</summary> */
- internal int _p = 0;
-
- public virtual int Count
- {
- get
- {
- return _data.Count - _p;
- }
- }
-
- /// <summary>
- /// How deep have we gone?
- /// </summary>
- public virtual int Range
- {
- get;
- protected set;
- }
-
- /** <summary>
- * Return element {@code i} elements ahead of current element. {@code i==0}
- * gets current element. This is not an absolute index into {@link #data}
- * since {@code p} defines the start of the real list.
- * </summary>
- */
- public virtual T this[int i]
- {
- get
- {
- int absIndex = _p + i;
- if (absIndex >= _data.Count)
- throw new ArgumentException(string.Format("queue index {0} > last index {1}", absIndex, _data.Count - 1));
- if (absIndex < 0)
- throw new ArgumentException(string.Format("queue index {0} < 0", absIndex));
-
- if (absIndex > Range)
- Range = absIndex;
-
- return _data[absIndex];
- }
- }
-
- /** <summary>Get and remove first element in queue</summary> */
- public virtual T Dequeue()
- {
- if (Count == 0)
- throw new InvalidOperationException();
-
- T o = this[0];
- _p++;
- // have we hit end of buffer?
- if ( _p == _data.Count )
- {
- // if so, it's an opportunity to start filling at index 0 again
- Clear(); // size goes to 0, but retains memory
- }
- return o;
- }
-
- public virtual void Enqueue( T o )
- {
- _data.Add( o );
- }
-
- public virtual T Peek()
- {
- return this[0];
- }
-
- public virtual void Clear()
- {
- _p = 0;
- _data.Clear();
- }
-
- /** <summary>Return string of current buffer contents; non-destructive</summary> */
- public override string ToString()
- {
- System.Text.StringBuilder buf = new System.Text.StringBuilder();
- int n = Count;
- for ( int i = 0; i < n; i++ )
- {
- buf.Append( this[i] );
- if ( ( i + 1 ) < n )
- buf.Append( " " );
- }
- return buf.ToString();
- }
- }
-}