X-Git-Url: http://svarog.pmf.uns.ac.rs/gitweb/?p=mjc2wsl.git;a=blobdiff_plain;f=src%2Fmjc2wsl.java;h=76d225b5c73c5f4b3d08b0bc47e966586b13813f;hp=f84fc3a29ae758a6575b950d061f6ed936d42487;hb=9fe5956ccf526188287b4e9939b4b73ba22920ba;hpb=34fbcd7d5825cd670082f11dcec087e5121c8115

diff --git a/src/mjc2wsl.java b/src/mjc2wsl.java
index f84fc3a..76d225b 100644
--- a/src/mjc2wsl.java
+++ b/src/mjc2wsl.java
@@ -10,7 +10,7 @@ import java.util.*;
  * @author Doni Pracner, http://perun.dmi.rs/pracner http://quemaster.com
  */
 public class mjc2wsl{
-	public static String versionN = "0.1.3";
+	public static String versionN = "0.1.4";
 
 	public static final int M_ERR = 2, M_WAR = 1, M_DEB = 0;
 	
@@ -32,6 +32,9 @@ public class mjc2wsl{
 			out.println("total errors:"+messageCounters[M_ERR]+" warnings:"+messageCounters[M_WAR]);
 	}
 	
+	private boolean addPauseAfterEachAddress=false, 
+		addPrintForEachAddress = false;
+	
 	/** Constant used for marking a regular comment from the original file */
 	public static final char C_REG = ' ';
 	/**
@@ -109,10 +112,12 @@ public class mjc2wsl{
 			"C:\" This file automatically converted from microjava bytecode\";\n"
 			+"C:\" with mjc2wsl v "+versionN+"\";\n");
 
-		ret.append("VAR < tempa := 0, tempb := 0, tempres :=0,\n");
+		ret.append("VAR < tempa := 0, tempb := 0, tempres :=0,\n\t");
 		for (int i = 0; i <= 3; i++)
-			ret.append("loc" + i + " := 0, ");
-		ret.append("\n	estack := < >, mstack := < >, t_e_m_p := 0 > :");
+			ret.append("mjvm_loc" + i + " := 0, ");
+		ret.append("\n	mjvm_estack := < >, mjvm_mstack := < >, "); 
+		ret.append("\n	mjvm_fp := 0, mjvm_sp := 0,");
+		ret.append("\n	t_e_m_p := 0 > :");
 
 		return ret.toString();
 	}
@@ -123,6 +128,38 @@ public class mjc2wsl{
 	
 	private boolean originalInComments = false;	
 	
+	private HashMap<Integer,String> opMap = null;
+	
+	private String opCodeFile = "mj-bytecodes.properties";
+	
+	private HashMap<Integer,String> getOpMap() {
+			if (opMap==null) {
+					opMap = new HashMap<Integer, String> (60, 0.98f);
+					try{
+					BufferedReader in = new BufferedReader(
+							new InputStreamReader(getClass().getResourceAsStream(opCodeFile)));
+					String str = in.readLine();
+					while (str != null) {
+							String[] ss = str.split("=");
+							opMap.put(Integer.parseInt(ss[0]),ss[1]);
+							str = in.readLine();
+					}
+					in.close();
+					}catch (Exception ex) {
+						ex.printStackTrace();
+					}
+			}
+			return opMap;
+	}
+	
+	public String getOpString(int op) {
+			return getOpMap().get(op);
+	}
+	
+	public String describeOpCode(int op) {
+			return op + " (" + getOpString(op) + ")";
+	}
+	
 	private InputStream mainIn;
 	private PrintWriter out = null;
 	private int counter = -1;
@@ -165,7 +202,7 @@ public class mjc2wsl{
 	}
 	
 	private String loc(int i){
-		return "loc" + i;
+		return "mjvm_loc" + i;
 	}
 	
 	/**
@@ -189,15 +226,15 @@ public class mjc2wsl{
 	//Expression stack
 	
 	private String cmdToEStack(int i) {
-		return "estack := <" + i + " > ++ estack;";
+		return "mjvm_estack := <" + i + " > ++ mjvm_estack;";
 	}
 
 	private String cmdToEStack(String i) {
-		return "estack := <" + i + " > ++ estack;";
+		return "mjvm_estack := <" + i + " > ++ mjvm_estack;";
 	}
 
 	private String cmdFromEStack(String st) {
-		return st + " := HEAD(estack); estack := TAIL(estack);";
+		return st + " := HEAD(mjvm_estack); mjvm_estack := TAIL(mjvm_estack);";
 	}
 	
 	private String getTopTwo(){
@@ -211,15 +248,15 @@ public class mjc2wsl{
 	//Method stack
 	
 	private String cmdToMStack(int i) {
-		return "mstack := <" + i + " > ++ mstack;";
+		return "mjvm_mstack := <" + i + " > ++ mjvm_mstack;";
 	}
 
 	private String cmdToMStack(String i) {
-		return "mstack := <" + i + " > ++ mstack;";
+		return "mjvm_mstack := <" + i + " > ++ mjvm_mstack;";
 	}
 
 	private String cmdFromMStack(String st) {
-		return st + " := HEAD(mstack); mstack := TAIL(mstack);";
+		return st + " := HEAD(mjvm_mstack); mjvm_mstack := TAIL(mjvm_mstack);";
 	}
 	
 	private String getRelationFor(int opcode) throws Exception {
@@ -236,17 +273,27 @@ public class mjc2wsl{
 
 	public void convertStream(InputStream ins) throws Exception{
 		mainIn = ins;
-		//skip start TODO make better
-		for (int i = 0; i < 14; i++)
-			get();
+		//process start 
+		byte m = (byte) get();
+		byte j = (byte) get();
+		if (m!='M' || j !='J') 
+				throw new Exception("Wrong start of bytecode file");
+		int codesize = get4();
+		int numberOfWords = get4();
+		int mainAdr = get4();
 		
 		prl(getStandardStart());
-		prl("SKIP;\n ACTIONS A_S_start:\n A_S_start == CALL a14 END");
+		prl("SKIP;\n ACTIONS A_S_start:\n A_S_start == CALL a"+(14+mainAdr)+" END");
 		int op = get();
 		while (op >= 0) {
 			if (originalInComments)
-				prl(createComment("" + op, C_OC));
+				prl(createComment(describeOpCode(op), C_OC));
 			prl("a" + counter + " == ");
+			if (addPrintForEachAddress) {
+					prl("PRINT(\"a"+counter+"\");");
+					if (addPauseAfterEachAddress)
+							prl("debug_disposable_string := @Read_Line(Standard_Input_Port);");
+			}
 			switch (op) {
 			case load: {
 				prl(cmdToEStack(loc(get())));
@@ -353,8 +400,11 @@ public class mjc2wsl{
 			}
 
 			case return_: {
-				prl(createComment("return not fully procesed yet"));
-				message("return not fully procesed yet", M_WAR);
+				prl("IF EMPTY?(mjvm_mstack) THEN CALL Z ELSE");
+				//else we let things return		
+				prl(cmdFromMStack("tempa"));
+				prl("SKIP FI");
+				prl("END b"+counter+" ==");
 				break;
 			}
 			case enter: {
@@ -371,6 +421,11 @@ public class mjc2wsl{
 			}
 
 			//TODO read, print
+			case read: {
+				prl("tempa := @String_To_Num(@Read_Line(Standard_Input_Port));");
+				prl(cmdToEStack("tempa"));
+				break;
+			}
 
 			// the prints
 			case bprint: {
@@ -384,15 +439,22 @@ public class mjc2wsl{
 				prl("PRINT(tempb);");
 				break;
 			}
+
+			case trap: {
+				// TODO finish trap
+				prl(createComment("trap not fully procesed yet"));
+				message("trap not fully procesed yet", M_WAR);
+				get();
+				break;
+			}
+			
+	
 			default:
 				prl(createComment("unknown op error: " + op, C_ERR));
 				message("unknown op error: "+ op, M_ERR);
 				break;
 			}
 
-			//TODO trap
-
-
 			op = get();
 			if (op >= 0)
 				prl("CALL a" + counter + " END");