CfgParser.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 / CfgParser.cs / 1 / CfgParser.cs
                        

                        
                            // ==++== 
//
//   Copyright (c) Microsoft Corporation.  All rights reserved.
//
// ==--== 
/*============================================================
 ** 
 ** Class: CfgParser 
 **
 ** 
 ** Purpose: XMLParser and Tree builder internal to BCL
 **
 **
 ===========================================================*/ 

// 
// These are managed definitions of interfaces used in the shim for XML Parsing 
// If you make any change please make a correspoding change in \src\dlls\shim\managedhelper.h
// 
//
//

namespace System 
{
    using System.Runtime.InteropServices; 
    using System.Collections; 
    using System.Runtime.CompilerServices;
    using System.Security.Permissions; 
    using System.Security;
    using System.Globalization;
    using System.IO;
    using System.Runtime.Versioning; 

    [Serializable] 
    internal enum ConfigEvents 
    {
        StartDocument     = 0, 
        StartDTD          = StartDocument + 1,
        EndDTD            = StartDTD + 1,
        StartDTDSubset    = EndDTD + 1,
        EndDTDSubset      = StartDTDSubset + 1, 
        EndProlog         = EndDTDSubset + 1,
        StartEntity       = EndProlog + 1, 
        EndEntity         = StartEntity + 1, 
        EndDocument       = EndEntity + 1,
        DataAvailable     = EndDocument + 1, 
        LastEvent         = DataAvailable
    }

    [Serializable] 
    internal enum ConfigNodeType
    { 
        Element = 1, 
        Attribute   = Element + 1,
        Pi  = Attribute + 1, 
        XmlDecl = Pi + 1,
        DocType = XmlDecl + 1,
        DTDAttribute    = DocType + 1,
        EntityDecl  = DTDAttribute + 1, 
        ElementDecl = EntityDecl + 1,
        AttlistDecl = ElementDecl + 1, 
        Notation    = AttlistDecl + 1, 
        Group   = Notation + 1,
        IncludeSect = Group + 1, 
        PCData  = IncludeSect + 1,
        CData   = PCData + 1,
        IgnoreSect  = CData + 1,
        Comment = IgnoreSect + 1, 
        EntityRef   = Comment + 1,
        Whitespace  = EntityRef + 1, 
        Name    = Whitespace + 1, 
        NMToken = Name + 1,
        String  = NMToken + 1, 
        Peref   = String + 1,
        Model   = Peref + 1,
        ATTDef  = Model + 1,
        ATTType = ATTDef + 1, 
        ATTPresence = ATTType + 1,
        DTDSubset   = ATTPresence + 1, 
        LastNodeType    = DTDSubset + 1 
    }
 
    [Serializable]
    internal enum ConfigNodeSubType
    {
        Version = (int)ConfigNodeType.LastNodeType, 
        Encoding    = Version + 1,
        Standalone  = Encoding + 1, 
        NS  = Standalone + 1, 
        XMLSpace    = NS + 1,
        XMLLang = XMLSpace + 1, 
        System  = XMLLang + 1,
        Public  = System + 1,
        NData   = Public + 1,
        AtCData = NData + 1, 
        AtId    = AtCData + 1,
        AtIdref = AtId + 1, 
        AtIdrefs    = AtIdref + 1, 
        AtEntity    = AtIdrefs + 1,
        AtEntities  = AtEntity + 1, 
        AtNmToken   = AtEntities + 1,
        AtNmTokens  = AtNmToken + 1,
        AtNotation  = AtNmTokens + 1,
        AtRequired  = AtNotation + 1, 
        AtImplied   = AtRequired + 1,
        AtFixed = AtImplied + 1, 
        PentityDecl = AtFixed + 1, 
        Empty   = PentityDecl + 1,
        Any = Empty + 1, 
        Mixed   = Any + 1,
        Sequence    = Mixed + 1,
        Choice  = Sequence + 1,
        Star    = Choice + 1, 
        Plus    = Star + 1,
        Questionmark    = Plus + 1, 
        LastSubNodeType = Questionmark + 1 
    }
 
    [Guid("afd0d21f-72f8-4819-99ad-3f255ee5006b"), InterfaceTypeAttribute(ComInterfaceType.InterfaceIsIUnknown)]
    internal interface IConfigHandler {

        void NotifyEvent(ConfigEvents nEvent); 

        void BeginChildren(int size, 
                           ConfigNodeSubType subType, 
                           ConfigNodeType nType,
                           int terminal, 
                           [MarshalAs(UnmanagedType.LPWStr)] String text,
                           int textLength,
                           int prefixLength);
 
        void EndChildren(int fEmpty,
                         int size, 
                         ConfigNodeSubType subType, 
                         ConfigNodeType nType,
                         int terminal, 
                         [MarshalAs(UnmanagedType.LPWStr)] String text,
                         int textLength,
                         int prefixLength);
 
        void Error(int size,
                   ConfigNodeSubType subType, 
                   ConfigNodeType nType, 
                   int terminal,
                   [MarshalAs(UnmanagedType.LPWStr)]String text, 
                   int textLength,
                   int prefixLength);

        void CreateNode(int size, 
                        ConfigNodeSubType subType,
                        ConfigNodeType nType, 
                        int terminal, 
                        [MarshalAs(UnmanagedType.LPWStr)]String text,
                        int textLength, 
                        int prefixLength);

        void CreateAttribute(int size,
                             ConfigNodeSubType subType, 
                             ConfigNodeType nType,
                             int terminal, 
                             [MarshalAs(UnmanagedType.LPWStr)]String text, 
                             int textLength,
                             int prefixLength); 
    }

    internal static class ConfigServer
    { 
        [MethodImplAttribute(MethodImplOptions.InternalCall)]
        internal static extern void RunParser(IConfigHandler factory, String fileName); 
    } 

    // Class used to build a DOM like tree of parsed XML 
    internal class ConfigTreeParser : IConfigHandler
    {
        ConfigNode rootNode = null;
        ConfigNode currentNode = null; 
        String lastProcessed = null;
        String fileName = null; 
        int attributeEntry; 
        String key = null;
        String [] treeRootPath = null; // element to start tree 
        bool parsing = false;
        int depth = 0;
        int pathDepth = 0;
        int searchDepth = 0; 
        bool bNoSearchPath = false;
 
        // NOTE: This parser takes a path eg. /configuration/system.runtime.remoting 
        // and will return a node which matches this.
        [ResourceExposure(ResourceScope.Machine)] 
        [ResourceConsumption(ResourceScope.Machine)]
        internal ConfigNode Parse(String fileName, String configPath)
        {
            return Parse(fileName, configPath, false); 
        }
 
        [ResourceExposure(ResourceScope.Machine)] 
        [ResourceConsumption(ResourceScope.Machine)]
        internal ConfigNode Parse(String fileName, String configPath, bool skipSecurityStuff) 
        {
            if (fileName == null)
                throw new ArgumentNullException("fileName");
            this.fileName = fileName; 
            if (configPath[0] == '/'){
                treeRootPath = configPath.Substring(1).Split('/'); 
                pathDepth = treeRootPath.Length - 1; 
                bNoSearchPath = false;
            } 
            else{
                treeRootPath = new String[1];
                treeRootPath[0] = configPath;
                bNoSearchPath = true; 
            }
 
            if (!skipSecurityStuff) { 
                (new FileIOPermission( FileIOPermissionAccess.Read, System.IO.Path.GetFullPathInternal( fileName ) )).Demand();
            } 
            (new SecurityPermission(SecurityPermissionFlag.UnmanagedCode)).Assert();

            try
            { 
                ConfigServer.RunParser(this, fileName);
            } 
            catch(FileNotFoundException) { 
                throw; // Pass these through unadulterated.
            } 
            catch(DirectoryNotFoundException) {
                throw; // Pass these through unadulterated.
            }
            catch(UnauthorizedAccessException) { 
                throw;
            } 
            catch(FileLoadException) { 
                throw;
            } 
            catch(Exception inner) {
                throw new ApplicationException(String.Format(CultureInfo.CurrentCulture, Environment.GetResourceString("XML_Syntax_InvalidSyntaxInFile"),
                                                             fileName,
                                                             lastProcessed), 
                                               inner);
            } 
            catch { 
                throw new ApplicationException(String.Format(CultureInfo.CurrentCulture, Environment.GetResourceString("XML_Syntax_InvalidSyntaxInFile"),
                                                             fileName, 
                                                             lastProcessed));
            }
            return rootNode;
        } 

        public void NotifyEvent(ConfigEvents nEvent) 
        { 
            BCLDebug.Trace("REMOTE", "NotifyEvent "+((Enum)nEvent).ToString()+"\n");
        } 

        public void BeginChildren(int size,
                                  ConfigNodeSubType subType,
                                  ConfigNodeType nType, 
                                  int terminal,
                                  [MarshalAs(UnmanagedType.LPWStr)] String text, 
                                  int textLength, 
                                  int prefixLength)
        { 
            //Trace("BeginChildren",size,subType,nType,terminal,text,textLength,prefixLength,0);
            if (!parsing &&
                (!bNoSearchPath
                 && depth == (searchDepth + 1) 
                 && String.Compare(text, treeRootPath[searchDepth], StringComparison.Ordinal) == 0))
            { 
                searchDepth++; 
            }
        } 

        public void EndChildren(int fEmpty,
                                int size,
                                ConfigNodeSubType subType, 
                                ConfigNodeType nType,
                                int terminal, 
                                [MarshalAs(UnmanagedType.LPWStr)] String text, 
                                int textLength,
                                int prefixLength) 
        {
            lastProcessed = "";
            if (parsing)
            { 
                //Trace("EndChildren",size,subType,nType,terminal,text,textLength,prefixLength,fEmpty);
 
                if (currentNode == rootNode) 
                {
                    // End of section of tree which is parsed 
                    parsing = false;
                }

                currentNode = currentNode.Parent; 
            }
            else if (nType == ConfigNodeType.Element){ 
                if(depth == searchDepth && String.Compare(text, treeRootPath[searchDepth - 1], StringComparison.Ordinal) == 0) 
                {
                    searchDepth--; 
                    depth--;
                }
                else
                    depth--; 
            }
 
        } 

        public void Error(int size, 
                          ConfigNodeSubType subType,
                          ConfigNodeType nType,
                          int terminal,
                          [MarshalAs(UnmanagedType.LPWStr)]String text, 
                          int textLength,
                          int prefixLength) 
        { 
            //Trace("Error",size,subType,nType,terminal,text,textLength,prefixLength,0);
        } 


        public void CreateNode(int size,
                               ConfigNodeSubType subType, 
                               ConfigNodeType nType,
                               int terminal, 
                               [MarshalAs(UnmanagedType.LPWStr)]String text, 
                               int textLength,
                               int prefixLength) 
        {
            //Trace("CreateNode",size,subType,nType,terminal,text,textLength,prefixLength,0);

            if (nType == ConfigNodeType.Element) 
            {
 				// New Node 
                lastProcessed = "<"+text+">"; 
                if (parsing
                    || (bNoSearchPath && 
                        String.Compare(text, treeRootPath[0], StringComparison.OrdinalIgnoreCase) == 0)
                    || (depth == searchDepth && searchDepth == pathDepth &&
                        String.Compare(text, treeRootPath[pathDepth], StringComparison.OrdinalIgnoreCase) == 0 ))
                    { 
                        parsing = true;
 
                        ConfigNode parentNode = currentNode; 
                        currentNode = new ConfigNode(text, parentNode);
                        if (rootNode == null) 
                            rootNode = currentNode;
                        else
                            parentNode.AddChild(currentNode);
                    } 
                else
                    depth++; 
            } 
            else if (nType == ConfigNodeType.PCData)
            { 
                // Data node
                if (currentNode != null)
                {
                    currentNode.Value = text; 
                }
            } 
        } 

        public void CreateAttribute(int size, 
                                    ConfigNodeSubType subType,
                                    ConfigNodeType nType,
                                    int terminal,
                                    [MarshalAs(UnmanagedType.LPWStr)]String text, 
                                    int textLength,
                                    int prefixLength) 
        { 
            //Trace("CreateAttribute",size,subType,nType,terminal,text,textLength,prefixLength,0);
            if (parsing) 
            {
                // if the value of the attribute is null, the parser doesn't come back, so need to store the attribute when the
                // attribute name is encountered
                if (nType == ConfigNodeType.Attribute) 
                {
                    attributeEntry = currentNode.AddAttribute(text, ""); 
                    key = text; 
                }
                else if (nType == ConfigNodeType.PCData) 
                {
                    currentNode.ReplaceAttribute(attributeEntry, key, text);
                }
                else 
                    throw new ApplicationException(String.Format(CultureInfo.CurrentCulture, Environment.GetResourceString("XML_Syntax_InvalidSyntaxInFile"),fileName,lastProcessed));
            } 
        } 

        [System.Diagnostics.Conditional("_LOGGING")] 
        private void Trace(String name,
                           int size,
                           ConfigNodeSubType subType,
                           ConfigNodeType nType, 
                           int terminal,
                           [MarshalAs(UnmanagedType.LPWStr)]String text, 
                           int textLength, 
                           int prefixLength, int fEmpty)
        { 

            BCLDebug.Trace("REMOTE","Node "+name);
            BCLDebug.Trace("REMOTE","text "+text);
            BCLDebug.Trace("REMOTE","textLength "+textLength); 
            BCLDebug.Trace("REMOTE","size "+size);
            BCLDebug.Trace("REMOTE","subType "+((Enum)subType).ToString()); 
            BCLDebug.Trace("REMOTE","nType "+((Enum)nType).ToString()); 
            BCLDebug.Trace("REMOTE","terminal "+terminal);
            BCLDebug.Trace("REMOTE","prefixLength "+prefixLength); 
            BCLDebug.Trace("REMOTE","fEmpty "+fEmpty+"\n");

        }
    } 

    // Node in Tree produced by ConfigTreeParser 
    internal class ConfigNode 
    {
        String m_name = null; 
        String m_value = null;
        ConfigNode m_parent = null;
        ArrayList m_children = new ArrayList(5);
        ArrayList m_attributes = new ArrayList(5); 

        internal ConfigNode(String name, ConfigNode parent) 
        { 
            m_name = name;
            m_parent = parent; 
        }

        internal String Name
        { 
            get {return m_name;}
        } 
 
        internal String Value
        { 
            get {return m_value;}
            set {m_value = value;}
        }
 
        internal ConfigNode Parent
        { 
            get {return m_parent;} 
        }
 
        internal ArrayList Children
        {
            get {return m_children;}
        } 

        internal ArrayList Attributes 
        { 
            get {return m_attributes;}
        } 

        internal void AddChild(ConfigNode child)
        {
            child.m_parent = this; 
            m_children.Add(child);
        } 
 
        internal int AddAttribute(String key, String value)
        { 
            m_attributes.Add(new DictionaryEntry(key, value));
            return m_attributes.Count-1;
        }
 
        internal void ReplaceAttribute(int index, String key, String value)
        { 
            m_attributes[index] = new DictionaryEntry(key, value); 
        }
 

        [System.Diagnostics.Conditional("_LOGGING")]
        internal void Trace()
        { 
            BCLDebug.Trace("REMOTE","************ConfigNode************");
            BCLDebug.Trace("REMOTE","Name = "+m_name); 
            if (m_value != null) 
                BCLDebug.Trace("REMOTE","Value = "+m_value);
            if (m_parent != null) 
                BCLDebug.Trace("REMOTE","Parent = "+m_parent.Name);
            for (int i=0; i
                            SyntaxHighlighter.all()

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