81 lines
2.2 KiB
C#
81 lines
2.2 KiB
C#
//
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// GuidHeap.cs
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//
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// Author:
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// Jb Evain (jbevain@gmail.com)
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//
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// (C) 2005 Jb Evain
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//
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// Permission is hereby granted, free of charge, to any person obtaining
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// a copy of this software and associated documentation files (the
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// "Software"), to deal in the Software without restriction, including
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// without limitation the rights to use, copy, modify, merge, publish,
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// distribute, sublicense, and/or sell copies of the Software, and to
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// permit persons to whom the Software is furnished to do so, subject to
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// the following conditions:
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//
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// The above copyright notice and this permission notice shall be
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// included in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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//
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namespace Mono.Cecil.Metadata {
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using System;
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using System.Collections;
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internal class GuidHeap : MetadataHeap {
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readonly IDictionary m_guids;
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public IDictionary Guids {
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get { return m_guids; }
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}
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public GuidHeap (MetadataStream stream) : base (stream, MetadataStream.GUID)
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{
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int capacity = (int)(stream.Header.Size / 16);
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m_guids = new Hashtable (capacity);
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}
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public Guid this [uint index] {
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get {
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if (index == 0)
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return new Guid (new byte [16]);
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int idx = (int) index - 1;
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if (m_guids.Contains (idx))
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return (Guid) m_guids [idx];
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if (idx + 16 > this.Data.Length)
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throw new IndexOutOfRangeException ();
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byte [] buffer = null;
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if (this.Data.Length == 16) {
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buffer = this.Data;
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} else {
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buffer = new byte [16];
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Buffer.BlockCopy (this.Data, idx, buffer, 0, 16);
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}
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Guid res = new Guid (buffer);
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m_guids [idx] = res;
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return res;
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}
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set { m_guids [index] = value; }
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}
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public override void Accept (IMetadataVisitor visitor)
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{
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visitor.VisitGuidHeap (this);
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}
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}
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}
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