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81 lines
2.1 KiB
81 lines
2.1 KiB
// |
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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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