82 lines
2.1 KiB
C#
82 lines
2.1 KiB
C#
//
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// StringHeap.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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// Copyright (c) 2008 - 2011 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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using System;
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using System.Collections.Generic;
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using System.Text;
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using Mono.Cecil.PE;
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namespace Mono.Cecil.Metadata {
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class StringHeap : Heap {
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readonly Dictionary<uint, string> strings = new Dictionary<uint, string> ();
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public StringHeap (Section section, uint start, uint size)
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: base (section, start, size)
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{
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}
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public string Read (uint index)
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{
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if (index == 0)
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return string.Empty;
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string @string;
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if (strings.TryGetValue (index, out @string))
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return @string;
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if (index > Size - 1)
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return string.Empty;
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@string = ReadStringAt (index);
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if (@string.Length != 0)
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strings.Add (index, @string);
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return @string;
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}
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protected virtual string ReadStringAt (uint index)
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{
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int length = 0;
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byte [] data = Section.Data;
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int start = (int) (index + Offset);
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for (int i = start; ; i++) {
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if (data [i] == 0)
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break;
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length++;
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}
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return Encoding.UTF8.GetString (data, start, length);
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}
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}
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}
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