package jplag.csharp;

import java.io.File;
import java.io.FileInputStream;

import jplag.Structure;
import jplag.UnicodeReader;
import jplag.csharp.grammar.CSharpLexer;
import jplag.csharp.grammar.CSharpParser;

public class Parser extends jplag.Parser implements CSharpTokenConstants {
	private Structure struct;
	private String currentFile;

	public jplag.Structure parse(File dir, String files[]) {
		struct = new Structure();
		errors = 0;
		for (int i = 0; i < files.length; i++) {
			//			getProgram().print(null, "Parsing file " + files[i] + "\n");
			if (!parseFile(dir, files[i]))
				errors++;
			struct.addToken(new CSharpToken(FILE_END, files[i], -1, -1, -1));
		}
		this.parseEnd();
		return struct;
	}

	private boolean parseFile(File dir, String file) {
		try {
			FileInputStream fis = new FileInputStream(new File(dir, file));
			currentFile = file;
			// Create a scanner that reads from the input stream passed to us
			CSharpLexer lexer = new CSharpLexer(new UnicodeReader(fis, "UTF-8"));
			lexer.setFilename(file);
			lexer.setTabSize(1);

			// Create a parser that reads from the scanner
			CSharpParser parser = new CSharpParser(lexer);
			parser.setFilename(file);
			parser.parser = this;//Added by emeric 22.01.05
			// start parsing at the compilationUnit rule
			parser.compilation_unit();

			// close file
			fis.close();
		} catch (Exception e) {
			getProgram().addError("  Parsing Error in '" + file + "':\n  " + e.toString() + "\n");
			return false;
		}
		return true;
	}

	public void add(int type, antlr.Token tok) {
		if (tok == null) {
			System.out.println("tok == null  ERROR!");
			return;
		}
		struct.addToken(new CSharpToken(type, currentFile, tok.getLine(), tok.getColumn(), tok.getText().length()));
		//     System.out.println("type: " + CSharpToken.type2string(type) +
		// 		       " text: '"+tok.getText()+"'");
	}

	public void add(int type, CSharpParser p) {
		add(type, p.getLastConsumedToken());
	}
}