AQNBuilder.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / FX-1434 / FX-1434 / 1.0 / untmp / whidbey / REDBITS / ndp / clr / src / BCL / System / Reflection / Emit / AQNBuilder.cs / 1 / AQNBuilder.cs
                        

                        
                            // ==++== 
//
//   Copyright (c) Microsoft Corporation.  All rights reserved.
//
// ==--== 
using System;
using System.Collections.Generic; 
using System.Runtime.CompilerServices; 

namespace System.Reflection.Emit 
{
    // TypeNameBuilder is NOT thread safe NOR hardened for OOM NOR reliable
    internal class TypeNameBuilder
    { 
        internal enum Format
        { 
            ToString, 
            FullName,
            AssemblyQualifiedName, 
        }

        #region FCalls
        [MethodImplAttribute(MethodImplOptions.InternalCall)] 
        private static extern IntPtr _CreateTypeNameBuilder();
        [MethodImplAttribute(MethodImplOptions.InternalCall)] 
        private static extern void _ReleaseTypeNameBuilder(IntPtr pAQN); 
        [MethodImplAttribute(MethodImplOptions.InternalCall)]
        private static extern void _OpenGenericArguments(IntPtr tnb); 
        [MethodImplAttribute(MethodImplOptions.InternalCall)]
        private static extern void _CloseGenericArguments(IntPtr tnb);
        [MethodImplAttribute(MethodImplOptions.InternalCall)]
        private static extern void _OpenGenericArgument(IntPtr tnb); 
        [MethodImplAttribute(MethodImplOptions.InternalCall)]
        private static extern void _CloseGenericArgument(IntPtr tnb); 
        [MethodImplAttribute(MethodImplOptions.InternalCall)] 
        private static extern void _AddName(IntPtr tnb, string name);
        [MethodImplAttribute(MethodImplOptions.InternalCall)] 
        private static extern void _AddPointer(IntPtr tnb);
        [MethodImplAttribute(MethodImplOptions.InternalCall)]
        private static extern void _AddByRef(IntPtr tnb);
        [MethodImplAttribute(MethodImplOptions.InternalCall)] 
        private static extern void _AddSzArray(IntPtr tnb);
        [MethodImplAttribute(MethodImplOptions.InternalCall)] 
        private static extern void _AddArray(IntPtr tnb, int rank); 
        [MethodImplAttribute(MethodImplOptions.InternalCall)]
        private static extern void _AddAssemblySpec(IntPtr tnb, string assemblySpec); 
        [MethodImplAttribute(MethodImplOptions.InternalCall)]
        private static extern string _ToString(IntPtr tnb);
        [MethodImplAttribute(MethodImplOptions.InternalCall)]
        private static extern void _Clear(IntPtr tnb); 
        #endregion
 
        #region Static Members 

        // TypeNameBuilder is NOT thread safe NOR hardened for OOM NOR reliable 
        internal static string ToString(Type type, Format format)
        {
            if (format == Format.FullName || format == Format.AssemblyQualifiedName)
            { 
                if (!type.IsGenericTypeDefinition && type.ContainsGenericParameters)
                    return null; 
            } 

            TypeNameBuilder tnb = new TypeNameBuilder(_CreateTypeNameBuilder()); 
            tnb.Clear();
            tnb.ConstructAssemblyQualifiedNameWorker(type, format);
            string toString = tnb.ToString();
            tnb.Dispose(); 
            return toString;
        } 
        #endregion 

        #region Private Data Members 
        private IntPtr m_typeNameBuilder;
        #endregion

        #region Constructor 
        private TypeNameBuilder(IntPtr typeNameBuilder) { m_typeNameBuilder = typeNameBuilder; }
        internal void Dispose() { _ReleaseTypeNameBuilder(m_typeNameBuilder); } 
        #endregion 

        #region private Members 
        private void AddElementType(Type elementType)
        {
            if (elementType.HasElementType)
                AddElementType(elementType.GetElementType()); 

            if (elementType.IsPointer) 
                AddPointer(); 

            else if (elementType.IsByRef) 
                AddByRef();

            else if (elementType.IsSzArray)
                AddSzArray(); 

            else if (elementType.IsArray) 
                AddArray(elementType.GetArrayRank()); 
        }
 
        private void ConstructAssemblyQualifiedNameWorker(Type type, Format format)
        {
            Type rootType = type;
 
            while (rootType.HasElementType)
                rootType = rootType.GetElementType(); 
 
            // Append namespace + nesting + name
            List nestings = new List(); 
            for (Type t = rootType; t != null; t = t.IsGenericParameter ? null : t.DeclaringType)
                nestings.Add(t);

            for (int i = nestings.Count - 1; i >= 0; i--) 
            {
                Type enclosingType = nestings[i]; 
                string name = enclosingType.Name; 

                if (i == nestings.Count - 1  && enclosingType.Namespace != null && enclosingType.Namespace.Length != 0) 
                    name = enclosingType.Namespace + "." + name;

                AddName(name);
            } 

            // Append generic arguments 
            if (rootType.IsGenericType && (!rootType.IsGenericTypeDefinition || format == Format.ToString)) 
            {
                Type[] genericArguments = rootType.GetGenericArguments(); 

                OpenGenericArguments();
                for (int i = 0; i < genericArguments.Length; i++)
                { 
                    Format genericArgumentsFormat = format == Format.FullName ? Format.AssemblyQualifiedName : format;
 
                    OpenGenericArgument(); 
                    ConstructAssemblyQualifiedNameWorker(genericArguments[i], genericArgumentsFormat);
                    CloseGenericArgument(); 
                }
                CloseGenericArguments();
            }
 
            // Append pointer, byRef and array qualifiers
            AddElementType(type); 
 
            if (format == Format.AssemblyQualifiedName)
                AddAssemblySpec(type.Module.Assembly.FullName); 
        }

        private void OpenGenericArguments() { _OpenGenericArguments(m_typeNameBuilder); }
        private void CloseGenericArguments() { _CloseGenericArguments(m_typeNameBuilder); } 
        private void OpenGenericArgument() { _OpenGenericArgument(m_typeNameBuilder); }
        private void CloseGenericArgument() { _CloseGenericArgument(m_typeNameBuilder); } 
        private void AddName(string name) { _AddName(m_typeNameBuilder, name); } 
        private void AddPointer() { _AddPointer(m_typeNameBuilder); }
        private void AddByRef() { _AddByRef(m_typeNameBuilder); } 
        private void AddSzArray() { _AddSzArray(m_typeNameBuilder); }
        private void AddArray(int rank) { _AddArray(m_typeNameBuilder, rank); }
        private void AddAssemblySpec(string assemblySpec) { _AddAssemblySpec(m_typeNameBuilder, assemblySpec); }
        public override string ToString() { return _ToString(m_typeNameBuilder); } 
        private void Clear() { _Clear(m_typeNameBuilder); }
        #endregion 
    } 
}

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