Imported Upstream version 4.8.0.309

Former-commit-id: 5f9c6ae75f295e057a7d2971f3a6df4656fa8850

external/cecil-legacy/Mono.Cecil.PE/TextMap.cs

@@ -0,0 +1,129 @@
+//
+// 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