[runtime] Prioritize loading a profiler library from the installation dir over standa...
[mono.git] / mcs / mcs / support.cs
index 8cca4a54b9cc289ce859f3cf9035be9749adc697..be2f6a48583cfee7c23627d640ad7d46d0f22024 100644 (file)
@@ -8,19 +8,17 @@
 //
 // Copyright 2001 Ximian, Inc (http://www.ximian.com)
 // Copyright 2003-2009 Novell, Inc
+// Copyright 2011 Xamarin Inc
 //
 
 using System;
 using System.IO;
 using System.Text;
-using System.Reflection;
-using System.Reflection.Emit;
-using System.Globalization;
 using System.Collections.Generic;
 
 namespace Mono.CSharp {
 
-       class ReferenceEquality<T> : IEqualityComparer<T> where T : class
+       sealed class ReferenceEquality<T> : IEqualityComparer<T> where T : class
        {
                public static readonly IEqualityComparer<T> Default = new ReferenceEquality<T> ();
 
@@ -38,8 +36,8 @@ namespace Mono.CSharp {
                        return System.Runtime.CompilerServices.RuntimeHelpers.GetHashCode (obj);
                }
        }
-
-       class Tuple<T1, T2>
+#if !NET_4_0 && !MOBILE_DYNAMIC
+       public class Tuple<T1, T2> : IEquatable<Tuple<T1, T2>>
        {
                public Tuple (T1 item1, T2 item2)
                {
@@ -49,19 +47,83 @@ namespace Mono.CSharp {
 
                public T1 Item1 { get; private set; }
                public T2 Item2 { get; private set; }
+
+               public override int GetHashCode ()
+               {
+                       return Item1.GetHashCode () ^ Item2.GetHashCode ();
+               }
+
+               #region IEquatable<Tuple<T1,T2>> Members
+
+               public bool Equals (Tuple<T1, T2> other)
+               {
+                       return EqualityComparer<T1>.Default.Equals (Item1, other.Item1) &&
+                               EqualityComparer<T2>.Default.Equals (Item2, other.Item2);
+               }
+
+               #endregion
+       }
+
+       public class Tuple<T1, T2, T3> : IEquatable<Tuple<T1, T2, T3>>
+       {
+               public Tuple (T1 item1, T2 item2, T3 item3)
+               {
+                       Item1 = item1;
+                       Item2 = item2;
+                       Item3 = item3;
+               }
+
+               public T1 Item1 { get; private set; }
+               public T2 Item2 { get; private set; }
+               public T3 Item3 { get; private set; }
+
+               public override int GetHashCode ()
+               {
+                       return Item1.GetHashCode () ^ Item2.GetHashCode () ^ Item3.GetHashCode ();
+               }
+
+               #region IEquatable<Tuple<T1,T2>> Members
+
+               public bool Equals (Tuple<T1, T2, T3> other)
+               {
+                       return EqualityComparer<T1>.Default.Equals (Item1, other.Item1) &&
+                               EqualityComparer<T2>.Default.Equals (Item2, other.Item2) &&
+                               EqualityComparer<T3>.Default.Equals (Item3, other.Item3);
+               }
+
+               #endregion
        }
 
-       public class Accessors {
-               public Accessor get_or_add;
-               public Accessor set_or_remove;
+       static class Tuple
+       {
+               public static Tuple<T1, T2> Create<T1, T2> (T1 item1, T2 item2)
+               {
+                       return new Tuple<T1, T2> (item1, item2);
+               }
 
-               // was 'set' declared before 'get'?  was 'remove' declared before 'add'?
-               public bool declared_in_reverse;
+               public static Tuple<T1, T2, T3> Create<T1, T2, T3> (T1 item1, T2 item2, T3 item3)
+               {
+                       return new Tuple<T1, T2, T3> (item1, item2, item3);
+               }
+       }
+#endif
 
-               public Accessors (Accessor get_or_add, Accessor set_or_remove)
+       static class ArrayComparer
+       {
+               public static bool IsEqual<T> (T[] array1, T[] array2)
                {
-                       this.get_or_add = get_or_add;
-                       this.set_or_remove = set_or_remove;
+                       if (array1 == null || array2 == null)
+                               return array1 == array2;
+
+                       var eq = EqualityComparer<T>.Default;
+
+                       for (int i = 0; i < array1.Length; ++i) {
+                               if (!eq.Equals (array1[i], array2[i])) {
+                                       return false;
+                               }
+                       }
+
+                       return true;
                }
        }
 
@@ -74,23 +136,28 @@ namespace Mono.CSharp {
        /// </summary>
        public class SeekableStreamReader : IDisposable
        {
-               const int buffer_read_length_spans = 3;
+               public const int DefaultReadAheadSize =
+#if FULL_AST
+                       65536 / 2; // Large buffer because of ReadChars of large literal string
+#else
+                       4096 / 2;
+#endif
 
-               TextReader reader;
+               StreamReader reader;
                Stream stream;
 
-               static char[] buffer;
-               int average_read_length;
+               char[] buffer;
+               int read_ahead_length;  // the length of read buffer
                int buffer_start;       // in chars
-               int char_count;         // count buffer[] valid characters
+               int char_count;         // count of filled characters in buffer[]
                int pos;                // index into buffer[]
 
-               public SeekableStreamReader (Stream stream, Encoding encoding)
+               public SeekableStreamReader (Stream stream, Encoding encoding, char[] sharedBuffer = null)
                {
                        this.stream = stream;
+                       this.buffer = sharedBuffer;
 
-                       const int default_average_read_length = 1024;
-                       InitializeStream (default_average_read_length);
+                       InitializeStream (DefaultReadAheadSize);
                        reader = new StreamReader (stream, encoding, true);
                }
 
@@ -102,13 +169,14 @@ namespace Mono.CSharp {
 
                void InitializeStream (int read_length_inc)
                {
-                       average_read_length += read_length_inc;
+                       read_ahead_length += read_length_inc;
+
+                       int required_buffer_size = read_ahead_length * 2;
 
-                       int required_buffer_size = average_read_length * buffer_read_length_spans;
                        if (buffer == null || buffer.Length < required_buffer_size)
                                buffer = new char [required_buffer_size];
 
-                       stream.Position = 0;                    
+                       stream.Position = 0;
                        buffer_start = char_count = pos = 0;
                }
 
@@ -120,12 +188,25 @@ namespace Mono.CSharp {
                ///   a correlation between them.
                /// </remarks>
                public int Position {
-                       get { return buffer_start + pos; }
+                       get {
+                               return buffer_start + pos;
+                       }
 
                        set {
-                               // If the lookahead was too small, re-read from the beginning.  Increase the buffer size while we're at it
-                               if (value < buffer_start)
-                                       InitializeStream (average_read_length / 2);
+                               //
+                               // If the lookahead was too small, re-read from the beginning. Increase the buffer size while we're at it
+                               // This should never happen until we are parsing some weird source code
+                               //
+                               if (value < buffer_start) {
+                                       InitializeStream (read_ahead_length);
+
+                                       //
+                                       // Discard buffer data after underlying stream changed position
+                                       // Cannot use handy reader.DiscardBufferedData () because it for
+                                       // some strange reason resets encoding as well
+                                       //
+                                       reader = new StreamReader (stream, reader.CurrentEncoding, true);
+                               }
 
                                while (value > buffer_start + char_count) {
                                        pos = char_count;
@@ -137,17 +218,26 @@ namespace Mono.CSharp {
                        }
                }
 
-               private bool ReadBuffer ()
+               bool ReadBuffer ()
                {
                        int slack = buffer.Length - char_count;
-                       if (slack <= average_read_length / 2) {
-                               // shift the buffer to make room for average_read_length number of characters
-                               int shift = average_read_length - slack;
+
+                       //
+                       // read_ahead_length is only half of the buffer to deal with
+                       // reads ahead and moves back without re-reading whole buffer
+                       //
+                       if (slack <= read_ahead_length) {
+                               //
+                               // shift the buffer to make room for read_ahead_length number of characters
+                               //
+                               int shift = read_ahead_length - slack;
                                Array.Copy (buffer, shift, buffer, 0, char_count - shift);
+
+                               // Update all counters
                                pos -= shift;
                                char_count -= shift;
                                buffer_start += shift;
-                               slack += shift;         // slack == average_read_length
+                               slack += shift;
                        }
 
                        char_count += reader.Read (buffer, char_count, slack);
@@ -155,6 +245,18 @@ namespace Mono.CSharp {
                        return pos < char_count;
                }
 
+               public char[] ReadChars (int fromPosition, int toPosition)
+               {
+                       char[] chars = new char[toPosition - fromPosition];
+                       if (buffer_start <= fromPosition && toPosition <= buffer_start + buffer.Length) {
+                               Array.Copy (buffer, fromPosition - buffer_start, chars, 0, chars.Length);
+                       } else {
+                               throw new NotImplementedException ();
+                       }
+
+                       return chars;
+               }
+
                public int Peek ()
                {
                        if ((pos >= char_count) && !ReadBuffer ())
@@ -172,571 +274,6 @@ namespace Mono.CSharp {
                }
        }
 
-       public class DoubleHash {
-               const int DEFAULT_INITIAL_BUCKETS = 100;
-
-               public DoubleHash () : this (DEFAULT_INITIAL_BUCKETS) {}
-
-               public DoubleHash (int size)
-               {
-                       count = size;
-                       buckets = new Entry [size];
-               }
-
-               int count;
-               Entry [] buckets;
-               int size = 0;
-
-               class Entry {
-                       public object key1;
-                       public object key2;
-                       public int hash;
-                       public object value;
-                       public Entry next;
-
-                       public Entry (object key1, object key2, int hash, object value, Entry next)
-                       {
-                               this.key1 = key1;
-                               this.key2 = key2;
-                               this.hash = hash;
-                               this.next = next;
-                               this.value = value;
-                       }
-               }
-
-               public bool Lookup (object a, object b, out object res)
-               {
-                       int h = (a.GetHashCode () ^ b.GetHashCode ()) & 0x7FFFFFFF;
-
-                       for (Entry e = buckets [h % count]; e != null; e = e.next) {
-                               if (e.hash == h && e.key1.Equals (a) && e.key2.Equals (b)) {
-                                       res = e.value;
-                                       return true;
-                               }
-                       }
-                       res = null;
-                       return false;
-               }
-
-               public void Insert (object a, object b, object value)
-               {
-                       // Is it an existing one?
-
-                       int h = (a.GetHashCode () ^ b.GetHashCode ()) & 0x7FFFFFFF;
-
-                       for (Entry e = buckets [h % count]; e != null; e = e.next) {
-                               if (e.hash == h && e.key1.Equals (a) && e.key2.Equals (b))
-                                       e.value = value;
-                       }
-
-                       int bucket = h % count;
-                       buckets [bucket] = new Entry (a, b, h, value, buckets [bucket]);
-
-                       // Grow whenever we double in size
-                       if (size++ == count) {
-                               count <<= 1;
-                               count ++;
-
-                               Entry [] newBuckets = new Entry [count];
-                               foreach (Entry root in buckets) {
-                                       Entry e = root;
-                                       while (e != null) {
-                                               int newLoc = e.hash % count;
-                                               Entry n = e.next;
-                                               e.next = newBuckets [newLoc];
-                                               newBuckets [newLoc] = e;
-                                               e = n;
-                                       }
-                               }
-
-                               buckets = newBuckets;
-                       }
-               }
-       }
-
-       class PartialMethodDefinitionInfo : MethodInfo
-       {
-               MethodOrOperator mc;
-               MethodAttributes attrs;
-
-               public PartialMethodDefinitionInfo (MethodOrOperator mc)
-               {
-                       this.mc = mc;
-                       if ((mc.ModFlags & Modifiers.STATIC) != 0)
-                               attrs = MethodAttributes.Static;
-               }
-
-               public override MethodInfo GetBaseDefinition ()
-               {
-                       throw new NotImplementedException ();
-               }
-
-               public override ICustomAttributeProvider ReturnTypeCustomAttributes
-               {
-                       get { throw new NotImplementedException (); }
-               }
-
-               public override MethodAttributes Attributes
-               {
-                       get { return attrs; }
-               }
-
-               public override MethodImplAttributes GetMethodImplementationFlags ()
-               {
-                       throw new NotImplementedException ();
-               }
-
-               public override ParameterInfo [] GetParameters ()
-               {
-                       throw new NotImplementedException ();
-               }
-
-               public override object Invoke (object obj, BindingFlags invokeAttr, Binder binder, object [] parameters, CultureInfo culture)
-               {
-                       throw new NotImplementedException ();
-               }
-
-               public override RuntimeMethodHandle MethodHandle
-               {
-                       get { throw new NotImplementedException (); }
-               }
-
-               public override Type DeclaringType
-               {
-                       get { return mc.Parent.TypeBuilder; }
-               }
-
-               public override object [] GetCustomAttributes (Type attributeType, bool inherit)
-               {
-                       throw new NotImplementedException ();
-               }
-
-               public override object [] GetCustomAttributes (bool inherit)
-               {
-                       throw new NotImplementedException ();
-               }
-
-               public override Type ReturnType {
-                       get {
-                               return mc.MemberType;
-                       }
-               }
-
-               public override bool IsDefined (Type attributeType, bool inherit)
-               {
-                       throw new NotImplementedException ();
-               }
-
-               public override string Name
-               {
-                       get { return mc.Name; }
-               }
-
-               public override Type ReflectedType
-               {
-                       get { throw new NotImplementedException (); }
-               }
-       }
-
-#if NET_4_0 || MS_COMPATIBLE
-       [System.Diagnostics.DebuggerDisplay ("Dynamic type")]
-#endif
-       class DynamicType : Type
-       {
-               public override Assembly Assembly {
-                       get { return CodeGen.Assembly.Builder; }
-               }
-
-               public override string AssemblyQualifiedName {
-                       get { throw new NotImplementedException (); }
-               }
-
-               public override Type BaseType {
-                       get { return null; }
-               }
-
-               public override string FullName {
-                       get { return UnderlyingSystemType.FullName; }
-               }
-
-               public override Guid GUID {
-                       get { throw new NotImplementedException (); }
-               }
-
-               protected override TypeAttributes GetAttributeFlagsImpl ()
-               {
-                       return UnderlyingSystemType.Attributes;
-               }
-
-               protected override ConstructorInfo GetConstructorImpl (BindingFlags bindingAttr, Binder binder, CallingConventions callConvention, Type[] types, ParameterModifier[] modifiers)
-               {
-                       throw new NotImplementedException ();
-               }
-
-               public override ConstructorInfo[] GetConstructors (BindingFlags bindingAttr)
-               {
-                       throw new NotImplementedException ();
-               }
-
-               public override Type GetElementType ()
-               {
-                       throw new NotImplementedException ();
-               }
-
-               public override EventInfo GetEvent (string name, BindingFlags bindingAttr)
-               {
-                       throw new NotImplementedException ();
-               }
-
-               public override EventInfo[] GetEvents (BindingFlags bindingAttr)
-               {
-                       throw new NotImplementedException ();
-               }
-
-               public override FieldInfo GetField (string name, BindingFlags bindingAttr)
-               {
-                       throw new NotImplementedException ();
-               }
-
-               public override FieldInfo[] GetFields (BindingFlags bindingAttr)
-               {
-                       throw new NotImplementedException ();
-               }
-
-               public override Type GetInterface (string name, bool ignoreCase)
-               {
-                       throw new NotImplementedException ();
-               }
-
-               public override Type[] GetInterfaces ()
-               {
-                       return Type.EmptyTypes;
-               }
-
-               public override MemberInfo[] GetMembers (BindingFlags bindingAttr)
-               {
-                       throw new NotImplementedException ();
-               }
-
-               protected override MethodInfo GetMethodImpl (string name, BindingFlags bindingAttr, Binder binder, CallingConventions callConvention, Type[] types, ParameterModifier[] modifiers)
-               {
-                       throw new NotImplementedException ();
-               }
-
-               public override MethodInfo[] GetMethods (BindingFlags bindingAttr)
-               {
-                       throw new NotImplementedException ();
-               }
-
-               public override Type GetNestedType (string name, BindingFlags bindingAttr)
-               {
-                       throw new NotImplementedException ();
-               }
-
-               public override Type[] GetNestedTypes (BindingFlags bindingAttr)
-               {
-                       throw new NotImplementedException ();
-               }
-
-               public override PropertyInfo[] GetProperties (BindingFlags bindingAttr)
-               {
-                       throw new NotImplementedException ();
-               }
-
-               protected override PropertyInfo GetPropertyImpl (string name, BindingFlags bindingAttr, Binder binder, Type returnType, Type[] types, ParameterModifier[] modifiers)
-               {
-                       throw new NotImplementedException ();
-               }
-
-               protected override bool HasElementTypeImpl ()
-               {
-                       return false;
-               }
-
-               public override object InvokeMember (string name, BindingFlags invokeAttr, Binder binder, object target, object[] args, ParameterModifier[] modifiers, System.Globalization.CultureInfo culture, string[] namedParameters)
-               {
-                       throw new NotImplementedException ();
-               }
-
-               protected override bool IsArrayImpl ()
-               {
-                       return false;
-               }
-
-               protected override bool IsByRefImpl ()
-               {
-                       return false;
-               }
-
-               protected override bool IsCOMObjectImpl ()
-               {
-                       return false;
-               }
-
-               protected override bool IsPointerImpl ()
-               {
-                       return false;
-               }
-
-               protected override bool IsPrimitiveImpl ()
-               {
-                       return false;
-               }
-
-               public override Module Module {
-                       get { return UnderlyingSystemType.Module; }
-               }
-
-               public override string Namespace {
-                       get { return UnderlyingSystemType.Namespace; }
-               }
-
-               public override Type UnderlyingSystemType {
-                       get { return TypeManager.object_type; }
-               }
-
-               public override object[] GetCustomAttributes (Type attributeType, bool inherit)
-               {
-                       return new object [0];
-               }
-
-               public override object[] GetCustomAttributes (bool inherit)
-               {
-                       return new object [0];
-               }
-
-               public override bool IsDefined (Type attributeType, bool inherit)
-               {
-                       throw new NotImplementedException ();
-               }
-
-               public override string Name {
-                       get { return UnderlyingSystemType.Name; }
-               }
-
-               public override string ToString ()
-               {
-                       return UnderlyingSystemType.ToString ();
-               }
-
-               public override RuntimeTypeHandle TypeHandle {
-                       get { return UnderlyingSystemType.TypeHandle; }
-               }
-
-               public override Type MakeByRefType ()
-               {
-                       // TODO: Wrong, hides dynamic type
-                       return UnderlyingSystemType.MakeByRefType ();
-               }
-       }
-
-#if NET_4_0 || MS_COMPATIBLE
-       [System.Diagnostics.DebuggerDisplay ("Dynamic array type")]
-#endif
-       class DynamicArrayType : Type
-       {
-               readonly int rank;
-               Type reflection_type;
-
-               public DynamicArrayType (int rank)
-               {
-                       this.rank = rank;
-               }
-
-               public override Assembly Assembly {
-                       get { return UnderlyingSystemType.Assembly; }
-               }
-
-               public override string AssemblyQualifiedName {
-                       get { throw new NotImplementedException (); }
-               }
-
-               public override Type BaseType {
-                       get { return TypeManager.array_type; }
-               }
-
-               public override string FullName {
-                       get { return UnderlyingSystemType.FullName; }
-               }
-
-               public override Guid GUID {
-                       get { throw new NotImplementedException (); }
-               }
-
-               protected override TypeAttributes GetAttributeFlagsImpl ()
-               {
-                       return UnderlyingSystemType.Attributes;
-               }
-
-               public override int GetArrayRank ()
-               {
-                       return rank;
-               }
-
-               protected override ConstructorInfo GetConstructorImpl (BindingFlags bindingAttr, Binder binder, CallingConventions callConvention, Type[] types, ParameterModifier[] modifiers)
-               {
-                       throw new NotImplementedException ();
-               }
-
-               public override ConstructorInfo[] GetConstructors (BindingFlags bindingAttr)
-               {
-                       throw new NotImplementedException ();
-               }
-
-               public override Type GetElementType ()
-               {
-                       return InternalType.Dynamic;
-               }
-
-               public override EventInfo GetEvent (string name, BindingFlags bindingAttr)
-               {
-                       throw new NotImplementedException ();
-               }
-
-               public override EventInfo[] GetEvents (BindingFlags bindingAttr)
-               {
-                       throw new NotImplementedException ();
-               }
-
-               public override FieldInfo GetField (string name, BindingFlags bindingAttr)
-               {
-                       throw new NotImplementedException ();
-               }
-
-               public override FieldInfo[] GetFields (BindingFlags bindingAttr)
-               {
-                       throw new NotImplementedException ();
-               }
-
-               public override Type GetInterface (string name, bool ignoreCase)
-               {
-                       throw new NotImplementedException ();
-               }
-
-               public override Type[] GetInterfaces ()
-               {
-                       return Type.EmptyTypes;
-               }
-
-               public override MemberInfo[] GetMembers (BindingFlags bindingAttr)
-               {
-                       throw new NotImplementedException ();
-               }
-
-               protected override MethodInfo GetMethodImpl (string name, BindingFlags bindingAttr, Binder binder, CallingConventions callConvention, Type[] types, ParameterModifier[] modifiers)
-               {
-                       throw new NotImplementedException ();
-               }
-
-               public override MethodInfo[] GetMethods (BindingFlags bindingAttr)
-               {
-                       throw new NotImplementedException ();
-               }
-
-               public override Type GetNestedType (string name, BindingFlags bindingAttr)
-               {
-                       throw new NotImplementedException ();
-               }
-
-               public override Type[] GetNestedTypes (BindingFlags bindingAttr)
-               {
-                       throw new NotImplementedException ();
-               }
-
-               public override PropertyInfo[] GetProperties (BindingFlags bindingAttr)
-               {
-                       throw new NotImplementedException ();
-               }
-
-               protected override PropertyInfo GetPropertyImpl (string name, BindingFlags bindingAttr, Binder binder, Type returnType, Type[] types, ParameterModifier[] modifiers)
-               {
-                       throw new NotImplementedException ();
-               }
-
-               protected override bool HasElementTypeImpl ()
-               {
-                       return true;
-               }
-
-               public override object InvokeMember (string name, BindingFlags invokeAttr, Binder binder, object target, object[] args, ParameterModifier[] modifiers, System.Globalization.CultureInfo culture, string[] namedParameters)
-               {
-                       throw new NotImplementedException ();
-               }
-
-               protected override bool IsArrayImpl ()
-               {
-                       return true;
-               }
-
-               protected override bool IsByRefImpl ()
-               {
-                       return false;
-               }
-
-               protected override bool IsCOMObjectImpl ()
-               {
-                       return false;
-               }
-
-               protected override bool IsPointerImpl ()
-               {
-                       return false;
-               }
-
-               protected override bool IsPrimitiveImpl ()
-               {
-                       return false;
-               }
-
-               public override Module Module {
-                       get { return UnderlyingSystemType.Module; }
-               }
-
-               public override string Namespace {
-                       get { return UnderlyingSystemType.Namespace; }
-               }
-
-               public override Type UnderlyingSystemType {
-                       get {
-                               if (reflection_type == null) {
-                                       reflection_type = rank == 1 ?
-                                               TypeManager.object_type.MakeArrayType () :
-                                               TypeManager.object_type.MakeArrayType (rank);
-                               }
-
-                               return reflection_type;
-                       }
-               }
-
-               public override object[] GetCustomAttributes (Type attributeType, bool inherit)
-               {
-                       return new object [0];
-               }
-
-               public override object[] GetCustomAttributes (bool inherit)
-               {
-                       return new object [0];
-               }
-
-               public override bool IsDefined (Type attributeType, bool inherit)
-               {
-                       throw new NotImplementedException ();
-               }
-
-               public override string Name {
-                       get { return UnderlyingSystemType.Name; }
-               }
-
-               public override string ToString ()
-               {
-                       return UnderlyingSystemType.ToString ();
-               }
-
-               public override RuntimeTypeHandle TypeHandle {
-                       get { return UnderlyingSystemType.TypeHandle; }
-               }
-       }
-
        public class UnixUtils {
                [System.Runtime.InteropServices.DllImport ("libc", EntryPoint="isatty")]
                extern static int _isatty (int fd);
@@ -785,4 +322,38 @@ namespace Mono.CSharp {
                        }
                }
        }
+
+       struct TypeNameParser
+       {
+               internal static string Escape(string name)
+               {
+                       if (name == null) {
+                               return null;
+                       }
+                       StringBuilder sb = null;
+                       for (int pos = 0; pos < name.Length; pos++) {
+                               char c = name[pos];
+                               switch (c) {
+                                       case '\\':
+                                       case '+':
+                                       case ',':
+                                       case '[':
+                                       case ']':
+                                       case '*':
+                                       case '&':
+                                               if (sb == null) {
+                                                       sb = new StringBuilder(name, 0, pos, name.Length + 3);
+                                               }
+                                               sb.Append("\\").Append(c);
+                                               break;
+                                       default:
+                                               if (sb != null) {
+                                                       sb.Append(c);
+                                               }
+                                               break;
+                               }
+                       }
+                       return sb != null ? sb.ToString() : name;
+               }
+       }
 }