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diff --git a/src/mjc2wsl.java b/src/mjc2wsl.java
--- a/src/mjc2wsl.java
+++ b/src/mjc2wsl.java
* @author Doni Pracner, http://perun.dmi.rs/pracner http://quemaster.com
*/
public class mjc2wsl{
- public static String versionN = "0.1.2";
+ public static String versionN = "0.1.4";
+ public static final int M_ERR = 2, M_WAR = 1, M_DEB = 0;
+
+ private int printLevel = M_ERR;
+
+ private int[] messageCounters = new int[M_ERR+1];
+
+ private void message(String mes, int level){
+ if (level>=printLevel)
+ System.out.println(mes);
+ messageCounters[level]++;
+ }
+
+ private void printMessageCounters(){
+ printMessageCounters(System.out);
+ }
+
+ private void printMessageCounters(PrintStream out){
+ out.println("total errors:"+messageCounters[M_ERR]+" warnings:"+messageCounters[M_WAR]);
+ }
+
+ private boolean genPauseAfterEachAddress=false,
+ genPrintForEachAddress = false,
+ genPrintEStackOnChange = false;
+
/** Constant used for marking a regular comment from the original file */
public static final char C_REG = ' ';
/**
trap = 57;
public String getStandardStart(){
+ return getStandardStart(10);
+ }
+
+ public String getStandardStart(int numWords){
StringBuilder ret = new StringBuilder(
"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");
- for (int i = 0; i <= 3; i++)
- ret.append("loc" + i + " := 0, ");
- ret.append("\n estack := < >, t_e_m_p := 0 > :");
+ ret.append("VAR < tempa := 0, tempb := 0, tempres :=0,\n\t");
+ ret.append("mjvm_locals := ARRAY(1,0), ");
+ ret.append("\n\tmjvm_statics := ARRAY("+numWords+",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();
}
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;
}
private String loc(int i){
- return "loc" + i;
+ //arrays start at 1 in WSL, so we need an offset
+ return "mjvm_locals[" + (i+1)+"]";
+ }
+
+ private String genStatic(int i){
+ return "mjvm_statics[" + (i+1)+"]";
}
/**
return "C:\"" + type + str.replace("\"", "''") + "\";";
}
+ //Expression stack
+
private String cmdToEStack(int i) {
- return "estack := <" + i + " > ++ estack;";
+ String res = "mjvm_estack := <" + i + " > ++ mjvm_estack;";
+ if (genPrintEStackOnChange) res +="PRINT(\"eStack\",mjvm_estack);";
+ return res;
}
private String cmdToEStack(String i) {
- return "estack := <" + i + " > ++ estack;";
+ String res = "mjvm_estack := <" + i + " > ++ mjvm_estack;";
+ if (genPrintEStackOnChange) res +="PRINT(\"eStack\",mjvm_estack);";
+ return res;
}
private String cmdFromEStack(String st) {
- return st + " := HEAD(estack); estack := TAIL(estack);";
+ String res = st + " := HEAD(mjvm_estack); mjvm_estack := TAIL(mjvm_estack);";
+ if (genPrintEStackOnChange) res +="PRINT(\"eStack\",mjvm_estack);";
+ return res;
+ }
+
+ private String cmdPopEStack() {
+ String res = "mjvm_estack := TAIL(mjvm_estack);";
+ if (genPrintEStackOnChange) res +="PRINT(\"eStack\",mjvm_estack);";
+ return res;
}
+
private String getTopTwo(){
return cmdFromEStack("tempa") + "\n" + cmdFromEStack("tempb");
}
private String getTop() {
return cmdFromEStack("tempa");
}
+
+ //Method stack
+
+ private String cmdToMStack(int i) {
+ return "mjvm_mstack := <" + i + " > ++ mjvm_mstack;";
+ }
+
+ private String cmdToMStack(String i) {
+ return "mjvm_mstack := <" + i + " > ++ mjvm_mstack;";
+ }
+
+ private String cmdFromMStack(String st) {
+ return st + " := HEAD(mjvm_mstack); mjvm_mstack := TAIL(mjvm_mstack);";
+ }
+
+ private String getRelationFor(int opcode) throws Exception {
+ switch (opcode) {
+ case jeq: return "=";
+ case jne: return "<>";
+ case jlt: return "<";
+ case jle: return "<=";
+ case jgt: return ">";
+ case jge: return ">=";
+ }
+ throw new Exception("Wrong opcode for a relation");
+ }
+
+ private boolean isJumpCode(int opcode) {
+ return (opcode>=jmp) && (opcode<=jge);
+ }
- public void convertStream(InputStream ins){
+ 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(getStandardStart(numberOfWords));
+ 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 (genPrintForEachAddress) {
+ prl("PRINT(\"a"+counter+"\");");
+ if (genPauseAfterEachAddress)
+ prl("debug_disposable_string := @Read_Line(Standard_Input_Port);");
+ }
switch (op) {
case load: {
prl(cmdToEStack(loc(get())));
prl(cmdFromEStack(loc(op - store_0)));
break;
}
+
+ case getstatic:{
+ prl(cmdToEStack(genStatic(get2())));
+ break;
+ }
+ case putstatic: {
+ prl(cmdFromEStack(genStatic(get2())));
+ break;
+ }
+ //TODO getfield, putfield
+ case getfield:
+ case putfield:{
+ prl(createComment("fields are not processed properly", C_ERR));
+ message("fields are not processed properly", M_ERR);
+ get2();
+ break;
+ }
+
case const_: {
prl(cmdToEStack(get4()));
break;
break;
}
+ case add: {
+ prl(getTopTwo());
+ prl("tempres := tempb + tempa;");
+ prl(cmdToEStack("tempres"));
+ break;
+ }
+ case sub: {
+ prl(getTopTwo());
+ prl("tempres := tempb - tempa;");
+ prl(cmdToEStack("tempres"));
+ break;
+ }
+ case mul: {
+ prl(getTopTwo());
+ prl("tempres := tempb * tempa;");
+ prl(cmdToEStack("tempres"));
+ break;
+ }
+ case div: {
+ prl(getTopTwo());
+ prl("IF tempa = 0 THEN ERROR(\"division by zero\") FI;");
+ prl("tempres := tempb DIV tempa;");
+ prl(cmdToEStack("tempres"));
+ break;
+ }
+ case rem: {
+ prl(getTopTwo());
+ prl("IF tempa = 0 THEN ERROR(\"division by zero\") FI;");
+ prl("tempres := tempb MOD tempa;");
+ prl(cmdToEStack("tempres"));
+ break;
+ }
+
+ //TODO neg, shl, shr, inc
+
+ case inc : {
+ int b1 = get(), b2 = get();
+ prl(loc(b1)+" := " +loc(b1)+" + "+b2);
+ break;
+ }
+ //TODO new_ newarray
+ case new_ :
+ get();//needs a short, but a byte will be taken bellow as well
+ case newarray :{
+ prl(createComment("memory allocation not processed properly", C_ERR));
+ message("memory allocation not processed properly", M_ERR);
+ get();
+ break;
+ }
+ //TODO aload, asstore, baload, bastore
+ //TODO arraylength
+ //TODO dup, dup2
+
+ case pop : {
+ prl(cmdPopEStack());
+ break;
+ }
+
case jmp: {
prl("CALL a" + (counter + get2()) + ";");
break;
case jgt:
case jge: {
prl(getTopTwo());
- prl("IF tempb >= tempa THEN CALL a" + (counter + get2())
+ prl("IF tempb "+ getRelationFor(op)
+ +" tempa THEN CALL a" + (counter + get2())
+ +" ELSE CALL a" + (counter+1)
+ " FI;");
break;
}
- case add: {
- prl(getTopTwo());
- prl("tempres := tempb + tempa;");
- prl(cmdToEStack("tempres"));
+ case call: {
+ prl("CALL a" + (counter + get2()) + ";");
break;
}
- case div: {
- prl(getTopTwo());
- prl("tempres := tempb / tempa;");
- prl(cmdToEStack("tempres"));
+
+ case return_: {
+ prl("IF EMPTY?(mjvm_mstack) THEN CALL Z FI");
+ //else we let things return
+ prl("END b"+counter+" ==");
break;
}
-
case enter: {
- prl(createComment("enter not fully procesed yet"));
- get();
- get();
+ int parameters = get();
+
+ int locals = get();
+ prl(cmdToMStack("mjvm_locals"));
+ prl("mjvm_locals := ARRAY("+locals+",0);");
+ for (int i = parameters-1; i >= 0; i--)
+ prl(cmdFromEStack(loc(i)));
break;
}
- case return_: {
- prl(createComment("return not fully procesed yet"));
+ case exit: {
+ prl(cmdFromMStack("mjvm_locals"));
break;
}
- case exit: {
- prl(createComment("exit not fully procesed yet"));
+
+ // read, print
+ case read:{
+ //TODO make it a char for read
+ message("char is read like a number", M_WAR);
+ prl(createComment("char is read like a number",C_SPEC));
+ }
+ case bread: {
+ prl("tempa := @String_To_Num(@Read_Line(Standard_Input_Port));");
+ prl(cmdToEStack("tempa"));
break;
}
// the prints
+ case print:{
+ // TODO need to make it a char on print
+ message("chars will be printed as number codes", M_WAR);
+ prl(createComment("char will be printed as a number code",C_SPEC));
+ }
case bprint: {
+ // TODO printing numbers needs different lengths of spacing
prl(getTopTwo());
- prl("PRINT(tempb);");
+ pr(createComment("print spacing",C_SPEC));
+ prl("IF tempa>1 THEN FOR i:=2 TO tempa STEP 1 DO PRINFLUSH(\" \") OD FI;");
+ prl("PRINFLUSH(tempb);");
break;
}
- case print: {
- // TODO need to make it a char
- prl(getTopTwo());
- prl("PRINT(tempb);");
+
+ case trap: {
+ prl("ERROR(\"Runtime error: trap("+get()+")\");");
break;
}
+
+
default:
prl(createComment("unknown op error: " + op, C_ERR));
+ message("unknown op error: "+ op, M_ERR);
break;
}
+ boolean wasJump = isJumpCode(op);
op = get();
if (op >= 0)
- prl("CALL a" + counter + " END");
+ if (wasJump)
+ prl("SKIP END");
+ else
+ prl("CALL a" + counter + " END");
}
prl("CALL Z;\nSKIP END\nENDACTIONS;\n");
prl(getStandardEnd());
public void printHelp() {
System.out.println("MicroJava bytecode to WSL converter. v " + versionN
+ ", by Doni Pracner");
- System.out.println("usage:\n\t {options} mjc2wsl filename [outfile]");
+ System.out.println("usage:\n\t mjc2wsl {options} filename [outfile]");
System.out.println("options:\n\t--screen print output to screen");
- System.out.println("\t-o --oc include original code in comments");
+ System.out.println("\t-o --oc[+-] include original code in comments");
+ System.out.println("\t-v verbose, print warning messages");
+ System.out.println("\t-q don't print even the error messages");
+ System.out.println("\t-d print detailed debug messages");
}
public String makeDefaultOutName(String inname){
originalInComments = args[i].charAt(4) == '+';
else
originalInComments = true;
- } else if (args[i].startsWith("--screen")) {
+ } else if (args[i].compareTo("--screen") == 0) {
out = new PrintWriter(System.out);
- }
- i++;
+ } else if (args[i].compareTo("-d") == 0) {
+ printLevel = M_DEB;//print debug info
+ } else if (args[i].compareTo("-v") == 0) {
+ printLevel = M_WAR;//print warnings
+ } else if (args[i].compareTo("-q") == 0) {
+ printLevel = M_ERR+1;//no printing
+ } else if (args[i].compareToIgnoreCase("--genEStackPrint") == 0) {
+ genPrintEStackOnChange = true;
+ } else if (args[i].compareToIgnoreCase("--genAddrPause") == 0) {
+ genPauseAfterEachAddress = true;
+ } else if (args[i].compareToIgnoreCase("--genAddrPrint") == 0) {
+ genPrintForEachAddress = true;
+ } else if (args[i].compareToIgnoreCase("--genAddr") == 0) {
+ genPrintForEachAddress = true;
+ genPauseAfterEachAddress = true;
+ } else if (args[i].compareToIgnoreCase("--genAll") == 0) {
+ genPrintEStackOnChange = true;
+ genPrintForEachAddress = true;
+ genPauseAfterEachAddress = true;
+ }i++;
}
if (i >= args.length) {
long mili = Calendar.getInstance().getTimeInMillis()
- now.getTimeInMillis();
System.out.println("conversion time:" + mili + " ms");
+ printMessageCounters();
out.close();
} else
System.out.println("file does not exist");