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TextMap.cs
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//
// Author:
// Jb Evain ([email protected])
//
// Copyright (c) 2008 - 2015 Jb Evain
// Copyright (c) 2008 - 2011 Novell, Inc.
//
// Licensed under the MIT/X11 license.
//
using System;
using RVA = System.UInt32;
namespace Mono.Cecil.PE {
enum TextSegment {
ImportAddressTable,
CLIHeader,
Code,
Resources,
Data,
StrongNameSignature,
// Metadata
MetadataHeader,
TableHeap,
StringHeap,
UserStringHeap,
GuidHeap,
BlobHeap,
PdbHeap,
// End Metadata
DebugDirectory,
ImportDirectory,
ImportHintNameTable,
StartupStub,
}
sealed class TextMap {
readonly Range [] map = new Range [17 /*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;
}
}
}