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126 lines
3.8 KiB
126 lines
3.8 KiB
/*
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* @(#)Compiler.java 2.1 2003/10/07
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*
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* Copyright (C) 1999, 2003 D.A. Watt and D.F. Brown
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* Dept. of Computing Science, University of Glasgow, Glasgow G12 8QQ Scotland
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* and School of Computer and Math Sciences, The Robert Gordon University,
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* St. Andrew Street, Aberdeen AB25 1HG, Scotland.
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* All rights reserved.
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*
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* This software is provided free for educational use only. It may
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* not be used for commercial purposes without the prior written permission
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* of the authors.
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*/
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package triangle;
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import triangle.abstractSyntaxTrees.Program;
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import triangle.codeGenerator.Emitter;
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import triangle.codeGenerator.Encoder;
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import triangle.contextualAnalyzer.Checker;
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import triangle.syntacticAnalyzer.Parser;
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import triangle.syntacticAnalyzer.Scanner;
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import triangle.syntacticAnalyzer.SourceFile;
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import triangle.treeDrawer.Drawer;
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/**
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* The main driver class for the Triangle compiler.
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*
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* @version 2.1 7 Oct 2003
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* @author Deryck F. Brown
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*/
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public class Compiler {
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/** The filename for the object program, normally obj.tam. */
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static String objectName = "obj.tam";
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private static Scanner scanner;
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private static Parser parser;
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private static Checker checker;
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private static Encoder encoder;
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private static Emitter emitter;
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private static ErrorReporter reporter;
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private static Drawer drawer;
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/** The AST representing the source program. */
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private static Program theAST;
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/**
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* Compile the source program to TAM machine code.
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*
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* @param sourceName the name of the file containing the source program.
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* @param objectName the name of the file containing the object program.
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* @param showingAST true iff the AST is to be displayed after contextual
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* analysis (not currently implemented).
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* @param showingTable true iff the object description details are to be
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* displayed during code generation (not currently
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* implemented).
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* @return true iff the source program is free of compile-time errors, otherwise
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* false.
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*/
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static boolean compileProgram(String sourceName, String objectName, boolean showingAST, boolean showingTable) {
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System.out.println("********** " + "Triangle Compiler (Java Version 2.1)" + " **********");
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System.out.println("Syntactic Analysis ...");
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SourceFile source = SourceFile.ofPath(sourceName);
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if (source == null) {
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System.out.println("Can't access source file " + sourceName);
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System.exit(1);
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}
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scanner = new Scanner(source);
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reporter = new ErrorReporter();
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parser = new Parser(scanner, reporter);
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checker = new Checker(reporter);
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encoder = new Encoder(emitter, reporter);
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emitter = new Emitter(reporter);
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drawer = new Drawer();
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// scanner.enableDebugging();
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theAST = parser.parseProgram(); // 1st pass
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if (reporter.numErrors == 0) {
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// if (showingAST) {
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// drawer.draw(theAST);
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// }
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System.out.println("Contextual Analysis ...");
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checker.check(theAST); // 2nd pass
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if (showingAST) {
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drawer.draw(theAST);
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}
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if (reporter.numErrors == 0) {
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System.out.println("Code Generation ...");
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encoder.encodeRun(theAST, showingTable); // 3rd pass
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}
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}
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boolean successful = (reporter.numErrors == 0);
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if (successful) {
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emitter.saveObjectProgram(objectName);
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System.out.println("Compilation was successful.");
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} else {
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System.out.println("Compilation was unsuccessful.");
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}
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return successful;
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}
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/**
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* Triangle compiler main program.
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*
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* @param args the only command-line argument to the program specifies the
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* source filename.
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*/
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public static void main(String[] args) {
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if (args.length != 1) {
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System.out.println("Usage: tc filename");
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System.exit(1);
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}
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String sourceName = args[0];
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var compiledOK = compileProgram(sourceName, objectName, false, false);
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System.exit(compiledOK ? 0 : 1);
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}
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}
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