CodeCompiler.cs source code in C# .NET

Source code for the .NET framework in C#

                        

Code:

/ 4.0 / 4.0 / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / CompMod / System / CodeDOM / Compiler / CodeCompiler.cs / 1305376 / CodeCompiler.cs

                            //------------------------------------------------------------------------------ 
// 
//
// [....]
//     Copyright (c) Microsoft Corporation.  All rights reserved. 
// 
//----------------------------------------------------------------------------- 
 
namespace System.CodeDom.Compiler {
    using System.Text; 

    using System.Diagnostics;
    using System;
    using Microsoft.Win32; 
    using Microsoft.Win32.SafeHandles;
    using System.IO; 
    using System.Collections; 
    using System.Security;
    using System.Security.Permissions; 
    using System.Security.Principal;
    using System.Reflection;
    using System.CodeDom;
    using System.Globalization; 
    using System.Runtime.Versioning;
 
    ///  
    /// Provides a
    /// base 
    /// class for code compilers.
    /// 
    [PermissionSet(SecurityAction.LinkDemand, Name="FullTrust")]
    [PermissionSet(SecurityAction.InheritanceDemand, Name="FullTrust")] 
    public abstract class CodeCompiler : CodeGenerator, ICodeCompiler {
 
        ///  
        CompilerResults ICodeCompiler.CompileAssemblyFromDom(CompilerParameters options, CodeCompileUnit e) {
            if( options == null) { 
                throw new ArgumentNullException("options");
            }

            try { 
                return FromDom(options, e);
            } 
            finally { 
                options.TempFiles.SafeDelete();
            } 
        }

        /// 
        [ResourceExposure(ResourceScope.Machine)] 
        [ResourceConsumption(ResourceScope.Machine)]
        CompilerResults ICodeCompiler.CompileAssemblyFromFile(CompilerParameters options, string fileName) { 
            if( options == null) { 
                throw new ArgumentNullException("options");
            } 

            try {
                return FromFile(options, fileName);
            } 
            finally {
                options.TempFiles.SafeDelete(); 
            } 
        }
 
        /// 
        CompilerResults ICodeCompiler.CompileAssemblyFromSource(CompilerParameters options, string source) {
            if( options == null) {
                throw new ArgumentNullException("options"); 
            }
 
            try { 
                return FromSource(options, source);
            } 
            finally {
                options.TempFiles.SafeDelete();
            }
        } 

        ///  
        CompilerResults ICodeCompiler.CompileAssemblyFromSourceBatch(CompilerParameters options, string[] sources) { 
            if( options == null) {
                throw new ArgumentNullException("options"); 
            }

            try {
                return FromSourceBatch(options, sources); 
            }
            finally { 
                options.TempFiles.SafeDelete(); 
            }
        } 

        /// 
        [ResourceExposure(ResourceScope.Machine)]
        [ResourceConsumption(ResourceScope.Machine)] 
        CompilerResults ICodeCompiler.CompileAssemblyFromFileBatch(CompilerParameters options, string[] fileNames) {
            if( options == null) { 
                throw new ArgumentNullException("options"); 
            }
            if (fileNames == null) 
                throw new ArgumentNullException("fileNames");

            try {
                // Try opening the files to make sure they exists.  This will throw an exception 
                // if it doesn't
                foreach (string fileName in fileNames) { 
                    using (Stream str = File.OpenRead(fileName)) { } 
                }
 
                return FromFileBatch(options, fileNames);
            }
            finally {
                options.TempFiles.SafeDelete(); 
            }
        } 
 
        /// 
        CompilerResults ICodeCompiler.CompileAssemblyFromDomBatch(CompilerParameters options, CodeCompileUnit[] ea) { 
            if( options == null) {
                throw new ArgumentNullException("options");
            }
 
            try {
                return FromDomBatch(options, ea); 
            } 
            finally {
                options.TempFiles.SafeDelete(); 
            }
        }

        ///  
        /// 
        /// Gets 
        /// or sets the file extension to use for source files. 
        /// 
        ///  
        protected abstract string FileExtension {
            get;
        }
 
        /// 
        /// Gets or 
        /// sets the name of the compiler executable. 
        /// 
        protected abstract string CompilerName { 
            get;
        }

 
        [ResourceExposure(ResourceScope.Machine)]
        [ResourceConsumption(ResourceScope.Machine)] 
        internal void Compile(CompilerParameters options, string compilerDirectory, string compilerExe, string arguments, ref string outputFile, ref int nativeReturnValue, string trueArgs) { 
            string errorFile = null;
            outputFile = options.TempFiles.AddExtension("out"); 

            // We try to execute the compiler with a full path name.
            string fullname = Path.Combine(compilerDirectory, compilerExe);
            if (File.Exists(fullname)) { 
                string trueCmdLine = null;
                if (trueArgs != null) 
                    trueCmdLine = "\"" + fullname + "\" " + trueArgs; 
                nativeReturnValue = Executor.ExecWaitWithCapture(options.SafeUserToken, "\"" + fullname + "\" " + arguments, Environment.CurrentDirectory, options.TempFiles, ref outputFile, ref errorFile, trueCmdLine);
            } 
            else {
                throw new InvalidOperationException(SR.GetString(SR.CompilerNotFound, fullname));
            }
        } 

        ///  
        ///  
        /// Compiles the specified compile unit and options, and returns the results
        /// from the compilation. 
        /// 
        /// 
        protected virtual CompilerResults FromDom(CompilerParameters options, CodeCompileUnit e) {
            if( options == null) { 
                throw new ArgumentNullException("options");
            } 
            new SecurityPermission(SecurityPermissionFlag.UnmanagedCode).Demand(); 

            CodeCompileUnit[] units = new CodeCompileUnit[1]; 
            units[0] = e;
            return FromDomBatch(options, units);
        }
 
        /// 
        ///  
        /// Compiles the specified file using the specified options, and returns the 
        /// results from the compilation.
        ///  
        /// 
        [ResourceExposure(ResourceScope.Machine)]
        [ResourceConsumption(ResourceScope.Machine)]
        protected virtual CompilerResults FromFile(CompilerParameters options, string fileName) { 
            if( options == null) {
                throw new ArgumentNullException("options"); 
            } 
            if (fileName == null)
                throw new ArgumentNullException("fileName"); 

            new SecurityPermission(SecurityPermissionFlag.UnmanagedCode).Demand();

            // Try opening the file to make sure it exists.  This will throw an exception 
            // if it doesn't
            using (Stream str = File.OpenRead(fileName)) { } 
 
            string[] filenames = new string[1];
            filenames[0] = fileName; 
            return FromFileBatch(options, filenames);
        }

         ///  
         /// 
         /// Compiles the specified source code using the specified options, and 
         /// returns the results from the compilation. 
         /// 
         ///  
         protected virtual CompilerResults FromSource(CompilerParameters options, string source) {
             if( options == null) {
                 throw new ArgumentNullException("options");
             } 

            new SecurityPermission(SecurityPermissionFlag.UnmanagedCode).Demand(); 
 
            string[] sources = new string[1];
            sources[0] = source; 

            return FromSourceBatch(options, sources);
        }
 
        /// 
        ///  
        /// Compiles the specified compile units and 
        /// options, and returns the results from the compilation.
        ///  
        /// 
        [ResourceExposure(ResourceScope.None)]
        [ResourceConsumption(ResourceScope.Machine, ResourceScope.Machine)]
        protected virtual CompilerResults FromDomBatch(CompilerParameters options, CodeCompileUnit[] ea) { 
            if( options == null) {
                throw new ArgumentNullException("options"); 
            } 
            if (ea == null)
                throw new ArgumentNullException("ea"); 

            new SecurityPermission(SecurityPermissionFlag.UnmanagedCode).Demand();

            string[] filenames = new string[ea.Length]; 

            CompilerResults results = null; 
 
#if !FEATURE_PAL
            // the extra try-catch is here to mitigate exception filter injection attacks. 
            try {
                WindowsImpersonationContext impersonation = Executor.RevertImpersonation();
                try {
#endif // !FEATURE_PAL 
                    for (int i = 0; i < ea.Length; i++) {
                        if (ea[i] == null) 
                            continue;       // the other two batch methods just work if one element is null, so we'll match that. 

                        ResolveReferencedAssemblies(options, ea[i]); 
                        filenames[i] = options.TempFiles.AddExtension(i + FileExtension);
                        Stream temp = new FileStream(filenames[i], FileMode.Create, FileAccess.Write, FileShare.Read);
                        try {
                            using (StreamWriter sw = new StreamWriter(temp, Encoding.UTF8)){ 
                                ((ICodeGenerator)this).GenerateCodeFromCompileUnit(ea[i], sw, Options);
                                sw.Flush(); 
                            } 
                        }
                        finally { 
                            temp.Close();
                        }
                    }
 
                    results = FromFileBatch(options, filenames);
#if !FEATURE_PAL 
                } 
                finally {
                    Executor.ReImpersonate(impersonation); 
                }
            }
            catch {
                throw; 
            }
#endif // !FEATURE_PAL 
            return results; 
        }
 
        /// 
        ///    
        ///       Because CodeCompileUnit and CompilerParameters both have a referenced assemblies
        ///       property, they must be reconciled. However, because you can compile multiple 
        ///       compile units with one set of options, it will simply merge them.
        ///     
        ///  
        private void ResolveReferencedAssemblies(CompilerParameters options, CodeCompileUnit e) {
            if (e.ReferencedAssemblies.Count > 0) { 
                foreach(string assemblyName in e.ReferencedAssemblies) {
                    if (!options.ReferencedAssemblies.Contains(assemblyName)) {
                        options.ReferencedAssemblies.Add(assemblyName);
                    } 
                }
            } 
        } 

        ///  
        /// 
        /// Compiles the specified files using the specified options, and returns the
        /// results from the compilation.
        ///  
        /// 
        [ResourceExposure(ResourceScope.Machine)] 
        [ResourceConsumption(ResourceScope.Machine)] 
        protected virtual CompilerResults FromFileBatch(CompilerParameters options, string[] fileNames) {
            if( options == null) { 
                throw new ArgumentNullException("options");
            }
            if (fileNames == null)
                throw new ArgumentNullException("fileNames"); 

            new SecurityPermission(SecurityPermissionFlag.UnmanagedCode).Demand(); 
 
            string outputFile = null;
            int retValue = 0; 

            CompilerResults results = new CompilerResults(options.TempFiles);
            SecurityPermission perm1 = new SecurityPermission(SecurityPermissionFlag.ControlEvidence);
            perm1.Assert(); 
            try {
#pragma warning disable 618 
               results.Evidence = options.Evidence; 
#pragma warning restore 618
            } 
            finally {
                 SecurityPermission.RevertAssert();
            }
            bool createdEmptyAssembly = false; 

            if (options.OutputAssembly == null || options.OutputAssembly.Length == 0) { 
                string extension = (options.GenerateExecutable) ? "exe" : "dll"; 
                options.OutputAssembly = results.TempFiles.AddExtension(extension, !options.GenerateInMemory);
 
                // Create an empty assembly.  This is so that the file will have permissions that
                // we can later access with our current credential.  If we don't do this, the compiler
                // could end up creating an assembly that we cannot open
                new FileStream(options.OutputAssembly, FileMode.Create, FileAccess.ReadWrite).Close(); 
                createdEmptyAssembly = true;
            } 
 
#if FEATURE_PAL
            results.TempFiles.AddExtension("ildb"); 
#else
            results.TempFiles.AddExtension("pdb");
#endif
 

            string args = CmdArgsFromParameters(options) + " " + JoinStringArray(fileNames, " "); 
 
            // Use a response file if the compiler supports it
            string responseFileArgs = GetResponseFileCmdArgs(options, args); 
            string trueArgs = null;
            if (responseFileArgs != null) {
                trueArgs = args;
                args = responseFileArgs; 
            }
 
            Compile(options, Executor.GetRuntimeInstallDirectory(), CompilerName, args, ref outputFile, ref retValue, trueArgs); 

            results.NativeCompilerReturnValue = retValue; 

            // only look for errors/warnings if the compile failed or the caller set the warning level
            if (retValue != 0 || options.WarningLevel > 0) {
 
                FileStream outputStream = new FileStream(outputFile, FileMode.Open,
                    FileAccess.Read, FileShare.ReadWrite); 
                try { 
                    if (outputStream.Length > 0) {
                        // The output of the compiler is in UTF8 
                        StreamReader sr = new StreamReader(outputStream, Encoding.UTF8);
                        string line;
                        do {
                            line = sr.ReadLine(); 
                            if (line != null) {
                                results.Output.Add(line); 
 
                                ProcessCompilerOutputLine(results, line);
                            } 
                        } while (line != null);
                    }
                }
                finally { 
                    outputStream.Close();
                } 
 
                // Delete the empty assembly if we created one
                if (retValue != 0 && createdEmptyAssembly) 
                    File.Delete(options.OutputAssembly);
            }

            if (!results.Errors.HasErrors && options.GenerateInMemory) { 
                FileStream fs = new FileStream(options.OutputAssembly, FileMode.Open, FileAccess.Read, FileShare.Read);
                try { 
                    int fileLen = (int)fs.Length; 
                    byte[] b = new byte[fileLen];
                    fs.Read(b, 0, fileLen); 
                    SecurityPermission perm = new SecurityPermission(SecurityPermissionFlag.ControlEvidence);
                    perm.Assert();
                    try {
#pragma warning disable 618 // Load with evidence is obsolete - this warning is passed on via the options parameter 
                       results.CompiledAssembly = Assembly.Load(b,null,options.Evidence);
#pragma warning restore 618 
                    } 
                    finally {
                       SecurityPermission.RevertAssert(); 
                    }
                }
                finally {
                    fs.Close(); 
                }
            } 
            else { 

                results.PathToAssembly = options.OutputAssembly; 
            }

            return results;
        } 

        ///  
        /// Processes the specified line from the specified  . 
        /// 
        protected abstract void ProcessCompilerOutputLine(CompilerResults results, string line); 

        /// 
        /// 
        /// Gets the command arguments from the specified . 
        /// 
        ///  
        protected abstract string CmdArgsFromParameters(CompilerParameters options); 

        ///  
        /// [To be supplied.]
        /// 
        [ResourceExposure(ResourceScope.None)]
        [ResourceConsumption(ResourceScope.Machine, ResourceScope.Machine)] 
        protected virtual string GetResponseFileCmdArgs(CompilerParameters options, string cmdArgs) {
 
            string responseFileName = options.TempFiles.AddExtension("cmdline"); 

            Stream temp = new FileStream(responseFileName, FileMode.Create, FileAccess.Write, FileShare.Read); 
            try {
                using (StreamWriter sw = new StreamWriter(temp, Encoding.UTF8)) {
                    sw.Write(cmdArgs);
                    sw.Flush(); 
                }
            } 
            finally { 
                temp.Close();
            } 

            return "@\"" + responseFileName + "\"";
        }
 
        /// 
        ///  
        /// Compiles the specified source code strings using the specified options, and 
        /// returns the results from the compilation.
        ///  
        /// 
        [ResourceExposure(ResourceScope.None)]
        [ResourceConsumption(ResourceScope.Machine, ResourceScope.Machine)]
        protected virtual CompilerResults FromSourceBatch(CompilerParameters options, string[] sources) { 
            if( options == null) {
                throw new ArgumentNullException("options"); 
            } 
            if (sources == null)
                throw new ArgumentNullException("sources"); 

            new SecurityPermission(SecurityPermissionFlag.UnmanagedCode).Demand();

            string[] filenames = new string[sources.Length]; 

            CompilerResults results = null; 
#if !FEATURE_PAL 
            // the extra try-catch is here to mitigate exception filter injection attacks.
            try { 
                WindowsImpersonationContext impersonation = Executor.RevertImpersonation();
                try {
#endif // !FEATURE_PAL
                    for (int i = 0; i < sources.Length; i++) { 
                        string name = options.TempFiles.AddExtension(i + FileExtension);
                        Stream temp = new FileStream(name, FileMode.Create, FileAccess.Write, FileShare.Read); 
                        try { 
                            using (StreamWriter sw = new StreamWriter(temp, Encoding.UTF8)) {
                                sw.Write(sources[i]); 
                                sw.Flush();
                            }
                        }
                        finally { 
                            temp.Close();
                        } 
                        filenames[i] = name; 
                   }
                   results = FromFileBatch(options, filenames); 
#if !FEATURE_PAL
                }
                finally {
                    Executor.ReImpersonate(impersonation); 
                }
            } 
            catch { 
                throw;
            } 
#endif // !FEATURE_PAL

            return results;
        } 

        ///  
        /// Joins the specified string arrays. 
        /// 
        protected static string JoinStringArray(string[] sa, string separator) { 
            if (sa == null || sa.Length == 0)
                return String.Empty;

            if (sa.Length == 1) { 
                return "\"" + sa[0] + "\"";
            } 
 
            StringBuilder sb = new StringBuilder();
            for (int i = 0; i < sa.Length - 1; i++) { 
                sb.Append("\"");
                sb.Append(sa[i]);
                sb.Append("\"");
                sb.Append(separator); 
            }
            sb.Append("\""); 
            sb.Append(sa[sa.Length - 1]); 
            sb.Append("\"");
 
            return sb.ToString();
        }
    }
} 

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
//------------------------------------------------------------------------------ 
// 
//
// [....]
//     Copyright (c) Microsoft Corporation.  All rights reserved. 
// 
//----------------------------------------------------------------------------- 
 
namespace System.CodeDom.Compiler {
    using System.Text; 

    using System.Diagnostics;
    using System;
    using Microsoft.Win32; 
    using Microsoft.Win32.SafeHandles;
    using System.IO; 
    using System.Collections; 
    using System.Security;
    using System.Security.Permissions; 
    using System.Security.Principal;
    using System.Reflection;
    using System.CodeDom;
    using System.Globalization; 
    using System.Runtime.Versioning;
 
    ///  
    /// Provides a
    /// base 
    /// class for code compilers.
    /// 
    [PermissionSet(SecurityAction.LinkDemand, Name="FullTrust")]
    [PermissionSet(SecurityAction.InheritanceDemand, Name="FullTrust")] 
    public abstract class CodeCompiler : CodeGenerator, ICodeCompiler {
 
        ///  
        CompilerResults ICodeCompiler.CompileAssemblyFromDom(CompilerParameters options, CodeCompileUnit e) {
            if( options == null) { 
                throw new ArgumentNullException("options");
            }

            try { 
                return FromDom(options, e);
            } 
            finally { 
                options.TempFiles.SafeDelete();
            } 
        }

        /// 
        [ResourceExposure(ResourceScope.Machine)] 
        [ResourceConsumption(ResourceScope.Machine)]
        CompilerResults ICodeCompiler.CompileAssemblyFromFile(CompilerParameters options, string fileName) { 
            if( options == null) { 
                throw new ArgumentNullException("options");
            } 

            try {
                return FromFile(options, fileName);
            } 
            finally {
                options.TempFiles.SafeDelete(); 
            } 
        }
 
        /// 
        CompilerResults ICodeCompiler.CompileAssemblyFromSource(CompilerParameters options, string source) {
            if( options == null) {
                throw new ArgumentNullException("options"); 
            }
 
            try { 
                return FromSource(options, source);
            } 
            finally {
                options.TempFiles.SafeDelete();
            }
        } 

        ///  
        CompilerResults ICodeCompiler.CompileAssemblyFromSourceBatch(CompilerParameters options, string[] sources) { 
            if( options == null) {
                throw new ArgumentNullException("options"); 
            }

            try {
                return FromSourceBatch(options, sources); 
            }
            finally { 
                options.TempFiles.SafeDelete(); 
            }
        } 

        /// 
        [ResourceExposure(ResourceScope.Machine)]
        [ResourceConsumption(ResourceScope.Machine)] 
        CompilerResults ICodeCompiler.CompileAssemblyFromFileBatch(CompilerParameters options, string[] fileNames) {
            if( options == null) { 
                throw new ArgumentNullException("options"); 
            }
            if (fileNames == null) 
                throw new ArgumentNullException("fileNames");

            try {
                // Try opening the files to make sure they exists.  This will throw an exception 
                // if it doesn't
                foreach (string fileName in fileNames) { 
                    using (Stream str = File.OpenRead(fileName)) { } 
                }
 
                return FromFileBatch(options, fileNames);
            }
            finally {
                options.TempFiles.SafeDelete(); 
            }
        } 
 
        /// 
        CompilerResults ICodeCompiler.CompileAssemblyFromDomBatch(CompilerParameters options, CodeCompileUnit[] ea) { 
            if( options == null) {
                throw new ArgumentNullException("options");
            }
 
            try {
                return FromDomBatch(options, ea); 
            } 
            finally {
                options.TempFiles.SafeDelete(); 
            }
        }

        ///  
        /// 
        /// Gets 
        /// or sets the file extension to use for source files. 
        /// 
        ///  
        protected abstract string FileExtension {
            get;
        }
 
        /// 
        /// Gets or 
        /// sets the name of the compiler executable. 
        /// 
        protected abstract string CompilerName { 
            get;
        }

 
        [ResourceExposure(ResourceScope.Machine)]
        [ResourceConsumption(ResourceScope.Machine)] 
        internal void Compile(CompilerParameters options, string compilerDirectory, string compilerExe, string arguments, ref string outputFile, ref int nativeReturnValue, string trueArgs) { 
            string errorFile = null;
            outputFile = options.TempFiles.AddExtension("out"); 

            // We try to execute the compiler with a full path name.
            string fullname = Path.Combine(compilerDirectory, compilerExe);
            if (File.Exists(fullname)) { 
                string trueCmdLine = null;
                if (trueArgs != null) 
                    trueCmdLine = "\"" + fullname + "\" " + trueArgs; 
                nativeReturnValue = Executor.ExecWaitWithCapture(options.SafeUserToken, "\"" + fullname + "\" " + arguments, Environment.CurrentDirectory, options.TempFiles, ref outputFile, ref errorFile, trueCmdLine);
            } 
            else {
                throw new InvalidOperationException(SR.GetString(SR.CompilerNotFound, fullname));
            }
        } 

        ///  
        ///  
        /// Compiles the specified compile unit and options, and returns the results
        /// from the compilation. 
        /// 
        /// 
        protected virtual CompilerResults FromDom(CompilerParameters options, CodeCompileUnit e) {
            if( options == null) { 
                throw new ArgumentNullException("options");
            } 
            new SecurityPermission(SecurityPermissionFlag.UnmanagedCode).Demand(); 

            CodeCompileUnit[] units = new CodeCompileUnit[1]; 
            units[0] = e;
            return FromDomBatch(options, units);
        }
 
        /// 
        ///  
        /// Compiles the specified file using the specified options, and returns the 
        /// results from the compilation.
        ///  
        /// 
        [ResourceExposure(ResourceScope.Machine)]
        [ResourceConsumption(ResourceScope.Machine)]
        protected virtual CompilerResults FromFile(CompilerParameters options, string fileName) { 
            if( options == null) {
                throw new ArgumentNullException("options"); 
            } 
            if (fileName == null)
                throw new ArgumentNullException("fileName"); 

            new SecurityPermission(SecurityPermissionFlag.UnmanagedCode).Demand();

            // Try opening the file to make sure it exists.  This will throw an exception 
            // if it doesn't
            using (Stream str = File.OpenRead(fileName)) { } 
 
            string[] filenames = new string[1];
            filenames[0] = fileName; 
            return FromFileBatch(options, filenames);
        }

         ///  
         /// 
         /// Compiles the specified source code using the specified options, and 
         /// returns the results from the compilation. 
         /// 
         ///  
         protected virtual CompilerResults FromSource(CompilerParameters options, string source) {
             if( options == null) {
                 throw new ArgumentNullException("options");
             } 

            new SecurityPermission(SecurityPermissionFlag.UnmanagedCode).Demand(); 
 
            string[] sources = new string[1];
            sources[0] = source; 

            return FromSourceBatch(options, sources);
        }
 
        /// 
        ///  
        /// Compiles the specified compile units and 
        /// options, and returns the results from the compilation.
        ///  
        /// 
        [ResourceExposure(ResourceScope.None)]
        [ResourceConsumption(ResourceScope.Machine, ResourceScope.Machine)]
        protected virtual CompilerResults FromDomBatch(CompilerParameters options, CodeCompileUnit[] ea) { 
            if( options == null) {
                throw new ArgumentNullException("options"); 
            } 
            if (ea == null)
                throw new ArgumentNullException("ea"); 

            new SecurityPermission(SecurityPermissionFlag.UnmanagedCode).Demand();

            string[] filenames = new string[ea.Length]; 

            CompilerResults results = null; 
 
#if !FEATURE_PAL
            // the extra try-catch is here to mitigate exception filter injection attacks. 
            try {
                WindowsImpersonationContext impersonation = Executor.RevertImpersonation();
                try {
#endif // !FEATURE_PAL 
                    for (int i = 0; i < ea.Length; i++) {
                        if (ea[i] == null) 
                            continue;       // the other two batch methods just work if one element is null, so we'll match that. 

                        ResolveReferencedAssemblies(options, ea[i]); 
                        filenames[i] = options.TempFiles.AddExtension(i + FileExtension);
                        Stream temp = new FileStream(filenames[i], FileMode.Create, FileAccess.Write, FileShare.Read);
                        try {
                            using (StreamWriter sw = new StreamWriter(temp, Encoding.UTF8)){ 
                                ((ICodeGenerator)this).GenerateCodeFromCompileUnit(ea[i], sw, Options);
                                sw.Flush(); 
                            } 
                        }
                        finally { 
                            temp.Close();
                        }
                    }
 
                    results = FromFileBatch(options, filenames);
#if !FEATURE_PAL 
                } 
                finally {
                    Executor.ReImpersonate(impersonation); 
                }
            }
            catch {
                throw; 
            }
#endif // !FEATURE_PAL 
            return results; 
        }
 
        /// 
        ///    
        ///       Because CodeCompileUnit and CompilerParameters both have a referenced assemblies
        ///       property, they must be reconciled. However, because you can compile multiple 
        ///       compile units with one set of options, it will simply merge them.
        ///     
        ///  
        private void ResolveReferencedAssemblies(CompilerParameters options, CodeCompileUnit e) {
            if (e.ReferencedAssemblies.Count > 0) { 
                foreach(string assemblyName in e.ReferencedAssemblies) {
                    if (!options.ReferencedAssemblies.Contains(assemblyName)) {
                        options.ReferencedAssemblies.Add(assemblyName);
                    } 
                }
            } 
        } 

        ///  
        /// 
        /// Compiles the specified files using the specified options, and returns the
        /// results from the compilation.
        ///  
        /// 
        [ResourceExposure(ResourceScope.Machine)] 
        [ResourceConsumption(ResourceScope.Machine)] 
        protected virtual CompilerResults FromFileBatch(CompilerParameters options, string[] fileNames) {
            if( options == null) { 
                throw new ArgumentNullException("options");
            }
            if (fileNames == null)
                throw new ArgumentNullException("fileNames"); 

            new SecurityPermission(SecurityPermissionFlag.UnmanagedCode).Demand(); 
 
            string outputFile = null;
            int retValue = 0; 

            CompilerResults results = new CompilerResults(options.TempFiles);
            SecurityPermission perm1 = new SecurityPermission(SecurityPermissionFlag.ControlEvidence);
            perm1.Assert(); 
            try {
#pragma warning disable 618 
               results.Evidence = options.Evidence; 
#pragma warning restore 618
            } 
            finally {
                 SecurityPermission.RevertAssert();
            }
            bool createdEmptyAssembly = false; 

            if (options.OutputAssembly == null || options.OutputAssembly.Length == 0) { 
                string extension = (options.GenerateExecutable) ? "exe" : "dll"; 
                options.OutputAssembly = results.TempFiles.AddExtension(extension, !options.GenerateInMemory);
 
                // Create an empty assembly.  This is so that the file will have permissions that
                // we can later access with our current credential.  If we don't do this, the compiler
                // could end up creating an assembly that we cannot open
                new FileStream(options.OutputAssembly, FileMode.Create, FileAccess.ReadWrite).Close(); 
                createdEmptyAssembly = true;
            } 
 
#if FEATURE_PAL
            results.TempFiles.AddExtension("ildb"); 
#else
            results.TempFiles.AddExtension("pdb");
#endif
 

            string args = CmdArgsFromParameters(options) + " " + JoinStringArray(fileNames, " "); 
 
            // Use a response file if the compiler supports it
            string responseFileArgs = GetResponseFileCmdArgs(options, args); 
            string trueArgs = null;
            if (responseFileArgs != null) {
                trueArgs = args;
                args = responseFileArgs; 
            }
 
            Compile(options, Executor.GetRuntimeInstallDirectory(), CompilerName, args, ref outputFile, ref retValue, trueArgs); 

            results.NativeCompilerReturnValue = retValue; 

            // only look for errors/warnings if the compile failed or the caller set the warning level
            if (retValue != 0 || options.WarningLevel > 0) {
 
                FileStream outputStream = new FileStream(outputFile, FileMode.Open,
                    FileAccess.Read, FileShare.ReadWrite); 
                try { 
                    if (outputStream.Length > 0) {
                        // The output of the compiler is in UTF8 
                        StreamReader sr = new StreamReader(outputStream, Encoding.UTF8);
                        string line;
                        do {
                            line = sr.ReadLine(); 
                            if (line != null) {
                                results.Output.Add(line); 
 
                                ProcessCompilerOutputLine(results, line);
                            } 
                        } while (line != null);
                    }
                }
                finally { 
                    outputStream.Close();
                } 
 
                // Delete the empty assembly if we created one
                if (retValue != 0 && createdEmptyAssembly) 
                    File.Delete(options.OutputAssembly);
            }

            if (!results.Errors.HasErrors && options.GenerateInMemory) { 
                FileStream fs = new FileStream(options.OutputAssembly, FileMode.Open, FileAccess.Read, FileShare.Read);
                try { 
                    int fileLen = (int)fs.Length; 
                    byte[] b = new byte[fileLen];
                    fs.Read(b, 0, fileLen); 
                    SecurityPermission perm = new SecurityPermission(SecurityPermissionFlag.ControlEvidence);
                    perm.Assert();
                    try {
#pragma warning disable 618 // Load with evidence is obsolete - this warning is passed on via the options parameter 
                       results.CompiledAssembly = Assembly.Load(b,null,options.Evidence);
#pragma warning restore 618 
                    } 
                    finally {
                       SecurityPermission.RevertAssert(); 
                    }
                }
                finally {
                    fs.Close(); 
                }
            } 
            else { 

                results.PathToAssembly = options.OutputAssembly; 
            }

            return results;
        } 

        ///  
        /// Processes the specified line from the specified  . 
        /// 
        protected abstract void ProcessCompilerOutputLine(CompilerResults results, string line); 

        /// 
        /// 
        /// Gets the command arguments from the specified . 
        /// 
        ///  
        protected abstract string CmdArgsFromParameters(CompilerParameters options); 

        ///  
        /// [To be supplied.]
        /// 
        [ResourceExposure(ResourceScope.None)]
        [ResourceConsumption(ResourceScope.Machine, ResourceScope.Machine)] 
        protected virtual string GetResponseFileCmdArgs(CompilerParameters options, string cmdArgs) {
 
            string responseFileName = options.TempFiles.AddExtension("cmdline"); 

            Stream temp = new FileStream(responseFileName, FileMode.Create, FileAccess.Write, FileShare.Read); 
            try {
                using (StreamWriter sw = new StreamWriter(temp, Encoding.UTF8)) {
                    sw.Write(cmdArgs);
                    sw.Flush(); 
                }
            } 
            finally { 
                temp.Close();
            } 

            return "@\"" + responseFileName + "\"";
        }
 
        /// 
        ///  
        /// Compiles the specified source code strings using the specified options, and 
        /// returns the results from the compilation.
        ///  
        /// 
        [ResourceExposure(ResourceScope.None)]
        [ResourceConsumption(ResourceScope.Machine, ResourceScope.Machine)]
        protected virtual CompilerResults FromSourceBatch(CompilerParameters options, string[] sources) { 
            if( options == null) {
                throw new ArgumentNullException("options"); 
            } 
            if (sources == null)
                throw new ArgumentNullException("sources"); 

            new SecurityPermission(SecurityPermissionFlag.UnmanagedCode).Demand();

            string[] filenames = new string[sources.Length]; 

            CompilerResults results = null; 
#if !FEATURE_PAL 
            // the extra try-catch is here to mitigate exception filter injection attacks.
            try { 
                WindowsImpersonationContext impersonation = Executor.RevertImpersonation();
                try {
#endif // !FEATURE_PAL
                    for (int i = 0; i < sources.Length; i++) { 
                        string name = options.TempFiles.AddExtension(i + FileExtension);
                        Stream temp = new FileStream(name, FileMode.Create, FileAccess.Write, FileShare.Read); 
                        try { 
                            using (StreamWriter sw = new StreamWriter(temp, Encoding.UTF8)) {
                                sw.Write(sources[i]); 
                                sw.Flush();
                            }
                        }
                        finally { 
                            temp.Close();
                        } 
                        filenames[i] = name; 
                   }
                   results = FromFileBatch(options, filenames); 
#if !FEATURE_PAL
                }
                finally {
                    Executor.ReImpersonate(impersonation); 
                }
            } 
            catch { 
                throw;
            } 
#endif // !FEATURE_PAL

            return results;
        } 

        ///  
        /// Joins the specified string arrays. 
        /// 
        protected static string JoinStringArray(string[] sa, string separator) { 
            if (sa == null || sa.Length == 0)
                return String.Empty;

            if (sa.Length == 1) { 
                return "\"" + sa[0] + "\"";
            } 
 
            StringBuilder sb = new StringBuilder();
            for (int i = 0; i < sa.Length - 1; i++) { 
                sb.Append("\"");
                sb.Append(sa[i]);
                sb.Append("\"");
                sb.Append(separator); 
            }
            sb.Append("\""); 
            sb.Append(sa[sa.Length - 1]); 
            sb.Append("\"");
 
            return sb.ToString();
        }
    }
} 

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
                        

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