// reads .rel files produced by as6811 assembler
// Fred Martin / computer science / UML
// Thu Oct 10 01:22:26 2002

import java.io.*;

class ReadRel {
    
    static byte[] code = new byte[512];
    static int codesize;

    public static byte[] read(File f) {
	codesize= 0;

	// init code to zeros
	for (int i=0; i<512; i++)
	    code[i]= 0;

	try {
	    FileReader fr = new FileReader(f);
	    BufferedReader br = new BufferedReader(fr);
	    String s;
	    while ((s = br.readLine()) != null) 
		codesize += parse(s);
	    
	} catch (Exception e) {
	    e.printStackTrace();
	}

	System.out.println("Read " + codesize + " bytes of code from file " + f);

	return code;
    }

    private static int parse(String line) {
	int addr, i;
	int l = line.length();
	int count= 0;

	if (l < 1) return count;
	if (line.charAt(0) != 'T') return count;
	
	// grab addr of code
	addr = 256 * Integer.parseInt(line.substring(2, 4), 16) +
	    Integer.parseInt(line.substring(5, 7), 16);

	// plow thru line grabbing bytes
	for (i= 8; i < l; i+=3) {
	    code[addr] = (byte)Integer.parseInt(line.substring(i, i + 2), 16);
	    addr++;
	    count++;
	}

	return count;
    }

}