SRGSCompiler.cs source code in C# .NET

                        Code:
                         / DotNET / DotNET / 8.0 / untmp / WIN_WINDOWS / lh_tools_devdiv_wpf / Windows / wcp / Speech / Src / Internal / SrgsCompiler / SRGSCompiler.cs / 1 / SRGSCompiler.cs
                        
                        
                            //  
//     Copyright (c) Microsoft Corporation.  All rights reserved.
// 
//
// 
// Description:
// 
// History: 
//		6/1/2004	[....]		Converted from the managed code
//      10/1/2004   [....]      Added Custom grammar support 
//----------------------------------------------------------------------------

using System;
using System.Collections.Generic; 
using System.Globalization;
using System.IO; 
using System.Reflection; 
using System.Runtime.InteropServices;
using System.Speech.Internal.SrgsParser; 
using System.Speech.Recognition;
using System.Speech.Recognition.SrgsGrammar;
using System.Text;
using System.Xml; 

namespace System.Speech.Internal.SrgsCompiler 
{ 
    internal static class SrgsCompiler
    { 
        //*******************************************************************
        //
        // Internal Methods
        // 
        //*******************************************************************
 
        #region Internal Methods 

        ///  
        /// Loads the SRGS XML grammar and produces the binary grammar format.
        /// 
        /// Source SRGS XML streams
        /// filename to compile to 
        /// stream to compile to
        /// Compile for CFG or DLL 
        /// in xmlReader.Count == 1, name of the originel file 
        /// List of referenced assemblies
        /// Strong name 
        internal static void CompileStream (XmlReader [] xmlReaders, string filename, Stream stream, bool fOutputCfg, Uri originalUri, string [] referencedAssemblies, string keyFile)
        {
            // raft of files to compiler is only available for class library
            System.Diagnostics.Debug.Assert (!fOutputCfg || xmlReaders.Length == 1); 

            int cReaders = xmlReaders.Length; 
#if !NO_STG 
            List cfgResources = new List ();
 
            CustomGrammar cgCombined = new CustomGrammar ();
#else
            object cfgResources = null;
#endif 
            for (int iReader = 0; iReader < cReaders; iReader++)
            { 
                // Set the current directory to the location where is the grammar 
                string srgsPath = null;
                Uri uri = originalUri; 
                if (uri == null)
                {
                    if (xmlReaders [iReader].BaseURI != null && xmlReaders [iReader].BaseURI.Length > 0)
                    { 
                        uri = new Uri (xmlReaders [iReader].BaseURI);
                    } 
                } 
                if (uri != null && (!uri.IsAbsoluteUri || uri.IsFile))
                { 
                    srgsPath = Path.GetDirectoryName (uri.IsAbsoluteUri ? uri.AbsolutePath : uri.OriginalString);
                }

                CultureInfo culture; 
                StringBuilder innerCode = new StringBuilder ();
                ISrgsParser srgsParser = (ISrgsParser) new XmlParser (xmlReaders [iReader], uri); 
                object cg = CompileStream (iReader + 1, srgsParser, srgsPath, filename, stream, fOutputCfg, innerCode, cfgResources, out culture, referencedAssemblies, keyFile); 
#if !NO_STG
                if (!fOutputCfg) 
                {
                    cgCombined.Combine ((CustomGrammar) cg, innerCode.ToString ());
                }
#endif 
            }
 
#if !NO_STG 
            // Create the DLL if this needs to be done
            if (!fOutputCfg) 
            {
                cgCombined.CreateAssembly (filename, cfgResources);
            }
#endif 
        }
 
        ///  
        /// Produces the binary grammar format.
        ///  
        /// Source SRGS XML streams
        /// filename to compile to
        /// stream to compile to
        /// Compile for CFG or DLL 
        /// List of referenced assemblies
        /// Strong name 
        internal static void CompileStream (SrgsDocument srgsGrammar, string filename, Stream stream, bool fOutputCfg, string [] referencedAssemblies, string keyFile) 
        {
            ISrgsParser srgsParser = (ISrgsParser) new SrgsDocumentParser (srgsGrammar.Grammar); 

#if !NO_STG
            List cfgResources = new List ();
#else 
            object cfgResources = null;
#endif 
 
            StringBuilder innerCode = new StringBuilder ();
            CultureInfo culture; 

            // Validate the grammar before compiling it. Set the tag-format and sapi flags too.
            srgsGrammar.Grammar.Validate ();
 
            object cg = CompileStream (1, srgsParser, null, filename, stream, fOutputCfg, innerCode, cfgResources, out culture, referencedAssemblies, keyFile);
 
#if !NO_STG 
            // Create the DLL if this needs to be done
            if (!fOutputCfg) 
            {
                CustomGrammar cgCombined = new CustomGrammar ();
                cgCombined.Combine ((CustomGrammar) cg, innerCode.ToString ());
                cgCombined.CreateAssembly (filename, cfgResources); 
            }
#endif 
        } 

        #endregion 

        static private object CompileStream (int iCfg, ISrgsParser srgsParser, string srgsPath, string filename, Stream stream, bool fOutputCfg, StringBuilder innerCode, object cfgResources, out CultureInfo culture, string [] referencedAssemblies, string keyFile)
        {
            Backend backend = new Backend (); 
#if !NO_STG
            CustomGrammar cg = new CustomGrammar (); 
            SrgsElementCompilerFactory elementFactory = new SrgsElementCompilerFactory (backend, cg); 
#else
            SrgsElementCompilerFactory elementFactory = new SrgsElementCompilerFactory (backend); 
#endif
            srgsParser.ElementFactory = elementFactory;
            srgsParser.Parse ();
 
            // Optimize in-memory graph representation of the grammar.
            backend.Optimize (); 
 
            //
            culture = backend.LangId == 0x540A ? new CultureInfo ("es-us") : new CultureInfo (backend.LangId); 

#if !NO_STG
            // A grammar may contains references to other files in codebehind.
            // Set the current directory to the location where is the grammar 
            if (cg._codebehind.Count > 0 && !string.IsNullOrEmpty (srgsPath))
            { 
                for (int i = 0; i < cg._codebehind.Count; i++) 
                {
                    if (!File.Exists (cg._codebehind [i])) 
                    {
                        cg._codebehind [i] = srgsPath + "\\" + cg._codebehind [i];
                    }
                } 
            }
 
            // Add the referenced assemblies 
            if (referencedAssemblies != null)
            { 
                foreach (string assembly in referencedAssemblies)
                {
                    cg._assemblyReferences.Add (assembly);
                } 
            }
 
            // Assign the key file 
            cg._keyFile = keyFile;
 
            // Assign the Scripts to the backend
            backend.ScriptRefs = cg._scriptRefs;

            // If the target is a dll, then create first the CFG and stuff it as an embedded resource 
            if (!fOutputCfg)
            { 
                // Creates a DLL with the CFG is a resource 
                // Create the CFG
                CustomGrammar.CfgResource resource = new CustomGrammar.CfgResource (); 
                resource.data = BuildCfg (backend).ToArray ();
                resource.name = iCfg.ToString (CultureInfo.InvariantCulture) + ".CFG";
                ((List)cfgResources).Add (resource);
 
                // Sanity check, create the DLL and checks that all the methods can be called
                // Combine all the scripts 
                innerCode.Append (cg.CreateAssembly (iCfg, filename, culture)); 
            }
            else 
            {
                //if semantic processing for a rule is defined, a script needs to be defined
                if (cg._scriptRefs.Count > 0 && !cg.HasScript)
                { 
                    XmlParser.ThrowSrgsException (SRID.NoScriptsForRules);
                } 
 
                // Creates a CFG with IL embedded
                CreateAssembly (backend, cg); 

                // Save binary grammar to dest
                if (!string.IsNullOrEmpty (filename))
                { 
                    // Create a stream if a filename was given
                    stream = new FileStream (filename, FileMode.Create, FileAccess.Write); 
                } 
#endif
            try 
                {
                    using (StreamMarshaler streamHelper = new StreamMarshaler (stream))
                    {
                        backend.Commit (streamHelper); 
                    }
                } 
                finally 
                {
                    if (!string.IsNullOrEmpty (filename)) 
                    {
                        stream.Close ();
                    }
                } 
#if !NO_STG
            } 
            return cg; 
#else
            return null; 
#endif
        }

 
#if !SPEECHSERVER
        ///  
        /// Build the state machine for a grammar and returns it in a Memory Stream. 
        /// 
        ///  
        /// 
        static private MemoryStream BuildCfg (Backend backend)
        {
            // Creates a DLL 
            MemoryStream cfgStream = new MemoryStream ();
 
            // Save binary grammar to dest 
            using (StreamMarshaler streamHelper = new StreamMarshaler (cfgStream))
            { 
#if !NO_STG
                // no IL
                backend.IL = null;
                backend.PDB = null; 
#endif
                // Generate the binary blob 
                backend.Commit (streamHelper); 
            }
            return cfgStream; 
        }
#endif

#if !NO_STG 

        ///  
        /// Generate the assembly code for a back. The scripts are defined in custom 
        /// grammars.
        ///  
        /// 
        /// 
        static void CreateAssembly (Backend backend, CustomGrammar cg)
        { 
            if (cg.HasScript)
            { 
                // Create the IL and checks that the signature for all the methods for scriptRefs are ok 
                // Pass a reference to the IL and scriptRefs to the backend.
                byte [] il; 
                byte [] symbols;
                cg.CreateAssembly (out il, out symbols);
                backend.IL = il;
                backend.PDB = symbols; 
            }
        } 
#endif 
    }
 
    internal enum RuleScope
    {
        PublicRule, PrivateRule
    } 
}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.
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