/branches/adinetz02/cbc/cbc/Common/CompileArgs.cs

using System;

using System.Collections.Generic;

using System.Text;



namespace CBucks.Compiler {



	// TODO: add correct & comprehensive handling for all command 

	// line errors



	/// <summary>

	/// The compilation target type

	/// </summary>

	public enum Target {

		/// <summary>

		/// No target type

		/// </summary>

		None,

		/// <summary>

		/// Executable file

		/// </summary>

		Exe,

		/// <summary>

		/// Dynamic Library

		/// </summary>

		Dll

	}  // end of enum Target



	/// <summary>

	/// The compilation mode enumeration

	/// </summary>

	public enum CompileMode {

		/// <summary>

		/// No compilation

		/// </summary>

		None,

		/// <summary>

		/// The tokenize-only compilation mode

		/// </summary>

		Token,

		/// <summary>

		/// The parse-only compilation mode

		/// </summary>

		Parse,

		/// <summary>

		/// The parse & check compilation mode (no code generation)

		/// </summary>

		Check,

		/// <summary>

		/// Code generation mode. This is the default value.

		/// </summary>

		Gen

	}  // end of CompileMode



	/// <summary>

	/// Represents arguments of the compilation

	/// </summary>

	public sealed class CompileArgs {



		/// <summary>

		/// Creates a new CompileArgs instance

		/// </summary>

		public CompileArgs() { }



		/// <summary>

		/// Creates a list of compile arguments from the command line

		/// </summary>

		/// <param name="args"> The arguments of the command line </param>

		/// <returns> The compilation arguments </returns>

		public static CompileArgs fromCmdLine(string[] args) {

			CompileArgs ca = new CompileArgs();

			ca.compMode = CompileMode.Gen;

			ca.target = Target.Exe;

			// parse the command line

			try {

				// flags to control re-specification

				bool targetSpecified = false, modeSpecified = false;

				for(int i = 0; i < args.Length; i++) {

					string arg = args[i];

					if(arg[0] != '-')

						Report.error(ErrorCode.InvalidCommandLine, null, true);

					switch(arg) {

						case "-cb":

							ca.useCbRuntime = true;

							break;

						case "-wd":

							ca.waitDebugAttach = true;

							break;

						case "-ce":

							ca.catchOuterExceptions = false;

							break;

						case "-wr":

							ca.waitResult = true;

							break;

						case "-o":

							if(null != ca.outName)

								Report.error(ErrorCode.InvalidCommandLine, null, true);

							ca.outName = args[++i];

							break;

						case "-h":

						case "--h":

						case "--help":

						case "-help":

						case "-?":

							ca.help = true;

							break;

						case "-t":

							if(targetSpecified)

								Report.error(ErrorCode.InvalidCommandLine, null, true);

							targetSpecified = true;

							if(args[i + 1] == "exe")

								ca.target = Target.Exe;

							else if(args[i + 1] == "dll")

								ca.target = Target.Dll;

							else

								Report.error(ErrorCode.InvalidCommandLine, null, true);

							i++;

							break;

						case "-r":

							if(null != ca.reportName)

								Report.error(ErrorCode.InvalidCommandLine, null, true);

							ca.reportName = args[++i];

							break;

						case "-m":

							if(modeSpecified)

								Report.error(ErrorCode.InvalidCommandLine, null, true);

							modeSpecified = true;

							switch(args[i + 1]) {

								case "token":

									ca.compMode = CompileMode.Token; break;

								case "parse":

									ca.compMode = CompileMode.Parse; break;

								case "check":

									ca.compMode = CompileMode.Check; break;

								case "gen":

									ca.compMode = CompileMode.Gen; break;

								default:

									Report.error(ErrorCode.InvalidCommandLine, null, true);

									break;

							}  // end of switch()

							i++;

							break;



						case "-l":

							// get the list of assemblies

							if(null != ca.assNames)

								Report.error(ErrorCode.InvalidCommandLine, null, true);

							List<string> assNames = new List<string>();

							for(i++; i < args.Length && args[i][0] != '-'; i++)

								assNames.Add(args[i]);

							if(assNames.Count == 0)

								Report.error(ErrorCode.InvalidCommandLine, null, true);

							ca.assNames = assNames.ToArray();

							if(i != args.Length) i--;

							break;



						case "-s":

							// get the list of source files

							if(null != ca.sourceNames)

								Report.error(ErrorCode.InvalidCommandLine, null, true);

							List<string> srcNames = new List<string>();

							for(i++; i < args.Length && args[i][0] != '-'; i++)

								srcNames.Add(args[i]);

							if(srcNames.Count == 0)

								Report.error(ErrorCode.InvalidCommandLine, null, true);

							ca.sourceNames = srcNames.ToArray();

							if(i != args.Length) i--;

							break;

					}  // end of switch()

				}  // end of for()

			} catch(IndexOutOfRangeException) {

				Report.error(ErrorCode.InvalidCommandLine, null, true);

			}  // end of try

			// check whether all necessary properties have been defined

			if(!ca.help) {

				if(null == ca.sourceNames)

					Report.error(ErrorCode.NoSourceFiles, null, true);

				if(null == ca.outName)

					Report.error(ErrorCode.NoTargetFile, null, true);

			}  // end of if()

			if(ca.help)

				printUsage();

			return ca;

		}  // end of fromCmdLine()



		/// <summary>

		/// Prints compiler usage text

		/// </summary>

		public static void printUsage() {

			Console.WriteLine("Usage: cbc [options]");

			Console.WriteLine("Possible options include:");

			Console.WriteLine("-o <filename>: specifies the output file");

			Console.WriteLine("-h, --h, --help, -help, -?, <empty>: " +

				"outputs this message");

			Console.WriteLine("-t exe|dll: specifies target file type");

			Console.WriteLine("-r <filename>: specifies the output text file");

			Console.WriteLine("-m token|parse|check|gen: specifies " +

				"compilation level");

			Console.WriteLine("-l <assembly1> ... <assemblyn>: " +

				"references assemblies");

			Console.WriteLine("-s <file1> ... <filen>: " +

				"adds source files to compile");

			Console.WriteLine("-wd: waits for the user to press <ENTER> at the " +

				"start of the program; useful for compiler debugging");

			Console.WriteLine("-wr: waits for the user to press <ENTER> at the " +

				"end of the program; useful for compiler debugging");

			Console.WriteLine("-ce: does not catch exceptions at the top level");

		}  // end of printUsage()



		/// <summary>

		/// The paths to the source files to compile

		/// </summary>

		public string[] sourceNames;



		/// <summary>

		/// The name of the output file

		/// </summary>

		public string outName;



		/// <summary>

		/// Indicates whether the help message should be printed

		/// </summary>

		public bool help = false;



		/// <summary>

		/// The default target

		/// </summary>

		public Target target = Target.Exe;



		/// <summary>

		/// The report name

		/// </summary>

		public string reportName = null;



		/// <summary>

		/// The compilation mode

		/// </summary>

		public CompileMode compMode = CompileMode.Gen;



		/// <summary>

		/// The names of the assemblies referenced

		/// </summary>

		public string[] assNames;



		/// <summary>

		/// Whether to wait for debug attach at the beginning of the compilation

		/// </summary>

		public bool waitDebugAttach = false;



		/// <summary>

		/// Whether to wait at the end of the compilation

		/// </summary>

		public bool waitResult = false;



		/// <summary>

		/// Whether to initialize C$ runtime. Without this option, the exe program

		/// using C$ runtime will not work

		/// </summary>

		public bool useCbRuntime = false;



		/// <summary>

		/// Indicates whether to catch outer exceptions; turning the option off

		/// helps with debugging the compiler

		/// </summary>

		public bool catchOuterExceptions = true;



	}  // end of CompileArgs



}  // end of namespace CBucks.Compiler