source: stable/HeuristicLab.ExtLibs/HeuristicLab.Cecil/0.9.5/Mono.Cecil-0.9.5/Mono.Cecil/Mono.Cecil.PE/TextMap.cs @ 15049

//
// TextMap.cs
//
// Author:
//   Jb Evain (jbevain@gmail.com)
//
// Copyright (c) 2008 - 2011 Jb Evain
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//

using System;

#if !READ_ONLY

using RVA = System.UInt32;

namespace Mono.Cecil.PE {

  enum TextSegment {
    ImportAddressTable,
    CLIHeader,
    Code,
    Resources,
    Data,
    StrongNameSignature,

    // Metadata
    MetadataHeader,
    TableHeap,
    StringHeap,
    UserStringHeap,
    GuidHeap,
    BlobHeap,
    // End Metadata

    DebugDirectory,
    ImportDirectory,
    ImportHintNameTable,
    StartupStub,
  }

  sealed class TextMap {

    readonly Range [] map = new Range [16 /*Enum.GetValues (typeof (TextSegment)).Length*/];

    public void AddMap (TextSegment segment, int length)
    {
      map [(int) segment] = new Range (GetStart (segment), (uint) length);
    }

    public void AddMap (TextSegment segment, int length, int align)
    {
      align--;

      AddMap (segment, (length + align) & ~align);
    }

    public void AddMap (TextSegment segment, Range range)
    {
      map [(int) segment] = range;
    }

    public Range GetRange (TextSegment segment)
    {
      return map [(int) segment];
    }

    public DataDirectory GetDataDirectory (TextSegment segment)
    {
      var range = map [(int) segment];

      return new DataDirectory (range.Length == 0 ? 0 : range.Start, range.Length);
    }

    public RVA GetRVA (TextSegment segment)
    {
      return map [(int) segment].Start;
    }

    public RVA GetNextRVA (TextSegment segment)
    {
      var i = (int) segment;
      return map [i].Start + map [i].Length;
    }

    public int GetLength (TextSegment segment)
    {
      return (int) map [(int) segment].Length;
    }

    RVA GetStart (TextSegment segment)
    {
      var index = (int) segment;
      return index == 0 ? ImageWriter.text_rva : ComputeStart (index);
    }

    RVA ComputeStart (int index)
    {
      index--;
      return map [index].Start + map [index].Length;
    }

    public uint GetLength ()
    {
      var range = map [(int) TextSegment.StartupStub];
      return range.Start - ImageWriter.text_rva + range.Length;
    }
  }
}

#endif