source: branches/RemoveBackwardsCompatibility/HeuristicLab.ExtLibs/HeuristicLab.Cecil/0.9.5/Mono.Cecil-0.9.5/Symbols/Mono.Cecil.Mdb/Mono.CompilerServices.SymbolWriter/SymbolWriterImpl.cs

//
// SymbolWriterImpl.cs
//
// Author:
//   Lluis Sanchez Gual (lluis@novell.com)
//
// (C) 2005 Novell, Inc.  http://www.novell.com
//
//
// 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;
using System.Reflection;
using System.Reflection.Emit;
using System.Runtime.CompilerServices;
using System.Collections;
using System.IO;
using System.Diagnostics.SymbolStore;

namespace Mono.CompilerServices.SymbolWriter
{
  public class SymbolWriterImpl: ISymbolWriter
  {
    MonoSymbolWriter msw;

    int nextLocalIndex;
    int currentToken;
    string methodName;
    Stack namespaceStack = new Stack ();
    bool methodOpened;

    Hashtable documents = new Hashtable ();

#if !CECIL
    ModuleBuilder mb;
    delegate Guid GetGuidFunc (ModuleBuilder mb);
    GetGuidFunc get_guid_func;

    public SymbolWriterImpl (ModuleBuilder mb)
    {
      this.mb = mb;
    }

    public void Close ()
    {
      MethodInfo mi = typeof (ModuleBuilder).GetMethod (
        "Mono_GetGuid",
        BindingFlags.Static | BindingFlags.NonPublic);
      if (mi == null)
        return;

      get_guid_func = (GetGuidFunc) System.Delegate.CreateDelegate (
        typeof (GetGuidFunc), mi);

      msw.WriteSymbolFile (get_guid_func (mb));
    }
#else
    Guid guid;

    public SymbolWriterImpl (Guid guid)
    {
      this.guid = guid;
    }

    public void Close ()
    {
      msw.WriteSymbolFile (guid);
    }
#endif

    public void CloseMethod ()
    {
      if (methodOpened) {
        methodOpened = false;
        nextLocalIndex = 0;
        msw.CloseMethod ();
      }
    }

    public void CloseNamespace ()
    {
      namespaceStack.Pop ();
      msw.CloseNamespace ();
    }

    public void CloseScope (int endOffset)
    {
      msw.CloseScope (endOffset);
    }

    public ISymbolDocumentWriter DefineDocument (
      string url,
      Guid language,
      Guid languageVendor,
      Guid documentType)
    {
      SymbolDocumentWriterImpl doc = (SymbolDocumentWriterImpl) documents [url];
      if (doc == null) {
        SourceFileEntry entry = msw.DefineDocument (url);
        CompileUnitEntry comp_unit = msw.DefineCompilationUnit (entry);
        doc = new SymbolDocumentWriterImpl (comp_unit);
        documents [url] = doc;
      }
      return doc;
    }

    public void DefineField (
      SymbolToken parent,
      string name,
      FieldAttributes attributes,
      byte[] signature,
      SymAddressKind addrKind,
      int addr1,
      int addr2,
      int addr3)
    {
    }

    public void DefineGlobalVariable (
      string name,
      FieldAttributes attributes,
      byte[] signature,
      SymAddressKind addrKind,
      int addr1,
      int addr2,
      int addr3)
    {
    }

    public void DefineLocalVariable (
      string name,
      FieldAttributes attributes,
      byte[] signature,
      SymAddressKind addrKind,
      int addr1,
      int addr2,
      int addr3,
      int startOffset,
      int endOffset)
    {
      msw.DefineLocalVariable (nextLocalIndex++, name);
    }

    public void DefineParameter (
      string name,
      ParameterAttributes attributes,
      int sequence,
      SymAddressKind addrKind,
      int addr1,
      int addr2,
      int addr3)
    {
    }

    public void DefineSequencePoints (
      ISymbolDocumentWriter document,
      int[] offsets,
      int[] lines,
      int[] columns,
      int[] endLines,
      int[] endColumns)
    {
      SymbolDocumentWriterImpl doc = (SymbolDocumentWriterImpl) document;
      SourceFileEntry file = doc != null ? doc.Entry.SourceFile : null;

      for (int n=0; n<offsets.Length; n++) {
        if (n > 0 && offsets[n] == offsets[n-1] && lines[n] == lines[n-1] && columns[n] == columns[n-1])
          continue;
        msw.MarkSequencePoint (offsets[n], file, lines[n], columns[n], false);
      }
    }

    public void Initialize (IntPtr emitter, string filename, bool fFullBuild)
    {
      msw = new MonoSymbolWriter (filename);
    }

    public void OpenMethod (SymbolToken method)
    {
      currentToken = method.GetToken ();
    }

    public void OpenNamespace (string name)
    {
      NamespaceInfo n = new NamespaceInfo ();
      n.NamespaceID = -1;
      n.Name = name;
      namespaceStack.Push (n);
    }

    public int OpenScope (int startOffset)
    {
      return msw.OpenScope (startOffset);
    }

    public void SetMethodSourceRange (
      ISymbolDocumentWriter startDoc,
      int startLine,
      int startColumn,
      ISymbolDocumentWriter endDoc,
      int endLine,
      int endColumn)
    {
      int nsId = GetCurrentNamespace (startDoc);
      SourceMethodImpl sm = new SourceMethodImpl (methodName, currentToken, nsId);
      msw.OpenMethod (((ICompileUnit)startDoc).Entry, nsId, sm);
      methodOpened = true;
    }

    public void SetScopeRange (int scopeID, int startOffset, int endOffset)
    {
    }

    public void SetSymAttribute (SymbolToken parent, string name, byte[] data)
    {
      // This is a hack! but MonoSymbolWriter needs the method name
      // and ISymbolWriter does not have any method for providing it
      if (name == "__name")
        methodName = System.Text.Encoding.UTF8.GetString (data);
    }

    public void SetUnderlyingWriter (IntPtr underlyingWriter)
    {
    }

    public void SetUserEntryPoint (SymbolToken entryMethod)
    {
    }

    public void UsingNamespace (string fullName)
    {
      if (namespaceStack.Count == 0) {
        OpenNamespace ("");
      }

      NamespaceInfo ni = (NamespaceInfo) namespaceStack.Peek ();
      if (ni.NamespaceID != -1) {
        NamespaceInfo old = ni;
        CloseNamespace ();
        OpenNamespace (old.Name);
        ni = (NamespaceInfo) namespaceStack.Peek ();
        ni.UsingClauses = old.UsingClauses;
      }
      ni.UsingClauses.Add (fullName);
    }

    int GetCurrentNamespace (ISymbolDocumentWriter doc)
    {
      if (namespaceStack.Count == 0) {
        OpenNamespace ("");
      }

      NamespaceInfo ni = (NamespaceInfo) namespaceStack.Peek ();
      if (ni.NamespaceID == -1)
      {
        string[] usings = (string[]) ni.UsingClauses.ToArray (typeof(string));

        int parentId = 0;
        if (namespaceStack.Count > 1) {
          namespaceStack.Pop ();
          parentId = ((NamespaceInfo) namespaceStack.Peek ()).NamespaceID;
          namespaceStack.Push (ni);
        }

        ni.NamespaceID = msw.DefineNamespace (ni.Name, ((ICompileUnit)doc).Entry, usings, parentId);
      }
      return ni.NamespaceID;
    }

  }

  class SymbolDocumentWriterImpl: ISymbolDocumentWriter, ISourceFile, ICompileUnit
  {
    CompileUnitEntry comp_unit;

    public SymbolDocumentWriterImpl (CompileUnitEntry comp_unit)
    {
      this.comp_unit = comp_unit;
    }

    public void SetCheckSum (Guid algorithmId, byte[] checkSum)
    {
    }

    public void SetSource (byte[] source)
    {
    }

    SourceFileEntry ISourceFile.Entry {
      get { return comp_unit.SourceFile; }
    }

    public CompileUnitEntry Entry {
      get { return comp_unit; }
    }
  }

  class SourceMethodImpl: IMethodDef
  {
    string name;
    int token;
    int namespaceID;

    public SourceMethodImpl (string name, int token, int namespaceID)
    {
      this.name = name;
      this.token = token;
      this.namespaceID = namespaceID;
    }

    public string Name {
      get { return name; }
    }

    public int NamespaceID {
      get { return namespaceID; }
    }

    public int Token {
      get { return token; }
    }
  }

  class NamespaceInfo
  {
    public string Name;
    public int NamespaceID;
    public ArrayList UsingClauses = new ArrayList ();
  }
}