src/mjc2wsl.java

   1 import java.io.*;
   2 import java.util.*;
   3
   4 /**
   5  * This program converts file from compiled MicroJava bytecode to WSL language
   6  * which is a part of the FermaT Transformation system. MicroJava is a subset
   7  * used in Compiler Construction courses by Hanspeter Moessenboeck, not
   8  * "Java ME".
   9  *
  10  * @author Doni Pracner, http://perun.dmi.rs/pracner http://quemaster.com
  11  */
  12 public class mjc2wsl{
  13         public static String versionN = "0.1.4";
  14
  15         public static final int M_ERR = 2, M_WAR = 1, M_DEB = 0;
  16
  17         private int printLevel = M_ERR;
  18
  19         private int[] messageCounters = new int[M_ERR+1];
  20
  21         private void message(String mes, int level){
  22                         if (level>=printLevel)
  23                                         System.out.println(mes);
  24                         messageCounters[level]++;
  25         }
  26
  27         private void printMessageCounters(){
  28                         printMessageCounters(System.out);
  29         }
  30
  31         private void printMessageCounters(PrintStream out){
  32                         out.println("total errors:"+messageCounters[M_ERR]+" warnings:"+messageCounters[M_WAR]);
  33         }
  34
  35         private boolean genPauseAfterEachAddress=false,
  36                 genPrintForEachAddress = false,
  37                 genPrintEStackOnChange = false;
  38
  39         /** Constant used for marking a regular comment from the original file */
  40         public static final char C_REG = ' ';
  41         /**
  42          * Constant used for marking when original code is inserted in the file,
  43          * next to the translations
  44          */
  45         public static final char C_OC = '#';
  46         /** Constant used for marking special messages from the translator */
  47         public static final char C_SPEC = '&';
  48         /** Constant used for marking error messages from the translator */
  49         public static final char C_ERR = '!';
  50
  51         /** instruction code in MicroJava bytecode. */
  52         public static final int
  53                 load        =  1,
  54                 load_0      =  2,
  55                 load_1      =  3,
  56                 load_2      =  4,
  57                 load_3      =  5,
  58                 store       =  6,
  59                 store_0     =  7,
  60                 store_1     =  8,
  61                 store_2     =  9,
  62                 store_3     = 10,
  63                 getstatic   = 11,
  64                 putstatic   = 12,
  65                 getfield    = 13,
  66                 putfield    = 14,
  67                 const_0     = 15,
  68                 const_1     = 16,
  69                 const_2     = 17,
  70                 const_3     = 18,
  71                 const_4     = 19,
  72                 const_5     = 20,
  73                 const_m1    = 21,
  74                 const_      = 22,
  75                 add         = 23,
  76                 sub         = 24,
  77                 mul         = 25,
  78                 div         = 26,
  79                 rem         = 27,
  80                 neg         = 28,
  81                 shl         = 29,
  82                 shr         = 30,
  83                 inc         = 31,
  84                 new_        = 32,
  85                 newarray    = 33,
  86                 aload       = 34,
  87                 astore      = 35,
  88                 baload      = 36,
  89                 bastore     = 37,
  90                 arraylength = 38,
  91                 pop         = 39,
  92                 dup         = 40,
  93                 dup2        = 41,
  94                 jmp         = 42,
  95                 jeq         = 43,
  96                 jne         = 44,
  97                 jlt         = 45,
  98                 jle         = 46,
  99                 jgt         = 47,
 100                 jge         = 48,
 101                 call        = 49,
 102                 return_     = 50,
 103                 enter       = 51,
 104                 exit        = 52,
 105                 read        = 53,
 106                 print       = 54,
 107                 bread       = 55,
 108                 bprint      = 56,
 109                 trap            = 57;
 110
 111         public String getStandardStart(){
 112                         return getStandardStart(10);
 113         }
 114
 115         public String getStandardStart(int numWords){
 116                 StringBuilder ret = new StringBuilder(
 117                         "C:\" This file automatically converted from microjava bytecode\";\n"
 118                         +"C:\" with mjc2wsl v "+versionN+"\";\n");
 119
 120                 ret.append("VAR < tempa := 0, tempb := 0, tempres :=0,\n\t");
 121                 ret.append("mjvm_locals := ARRAY(1,0), ");
 122                 ret.append("\n\tmjvm_statics := ARRAY("+numWords+",0), ");
 123                 ret.append("\n\tmjvm_arrays := < >, ");
 124                 ret.append("\n\tmjvm_objects := < >, ");
 125                 ret.append("\n  mjvm_estack := < >, mjvm_mstack := < >, ");
 126                 ret.append("\n  mjvm_fp := 0, mjvm_sp := 0,");
 127                 ret.append("\n  t_e_m_p := 0 > :");
 128
 129                 return ret.toString();
 130         }
 131
 132         public String getStandardEnd(){
 133                 return "SKIP\nENDVAR";
 134         }
 135
 136         private boolean originalInComments = false;
 137
 138         private HashMap<Integer,String> opMap = null;
 139
 140         private String opCodeFile = "mj-bytecodes.properties";
 141
 142         private HashMap<Integer,String> getOpMap() {
 143                         if (opMap==null) {
 144                                         opMap = new HashMap<Integer, String> (60, 0.98f);
 145                                         try{
 146                                         BufferedReader in = new BufferedReader(
 147                                                         new InputStreamReader(getClass().getResourceAsStream(opCodeFile)));
 148                                         String str = in.readLine();
 149                                         while (str != null) {
 150                                                         String[] ss = str.split("=");
 151                                                         opMap.put(Integer.parseInt(ss[0]),ss[1]);
 152                                                         str = in.readLine();
 153                                         }
 154                                         in.close();
 155                                         }catch (Exception ex) {
 156                                                 ex.printStackTrace();
 157                                         }
 158                         }
 159                         return opMap;
 160         }
 161
 162         public String getOpString(int op) {
 163                         return getOpMap().get(op);
 164         }
 165
 166         public String describeOpCode(int op) {
 167                         return op + " (" + getOpString(op) + ")";
 168         }
 169
 170         private InputStream mainIn;
 171         private PrintWriter out = null;
 172         private int counter = -1;
 173
 174         private void pr(int i){
 175                         out.print(i);
 176         }
 177
 178         private void pr(char i){
 179                         out.print(i);
 180         }
 181
 182         private void pr(String i){
 183                         out.print(i);
 184         }
 185
 186         private void prl(String i){
 187                         out.println(i);
 188         }
 189
 190         private int get() {
 191                 int res = -1;
 192                 try {
 193                         res = mainIn.read();
 194                         if (res >= 0)
 195                                 res = res << 24 >>> 24;
 196                 } catch (IOException ex) {
 197                         ex.printStackTrace();
 198                 }
 199                 counter++;
 200                 return res;
 201         }
 202
 203         private int get2() {
 204                 return (get() * 256 + get()) << 16 >> 16;
 205         }
 206
 207         private int get4() {
 208                 return (get2() << 16) + (get2() << 16 >>> 16);
 209         }
 210
 211         private String loc(int i){
 212                 //arrays start at 1 in WSL, so we need an offset
 213                 return "mjvm_locals[" + (i+1)+"]";
 214         }
 215
 216         private String genStatic(int i){
 217                         return "mjvm_statics[" + (i+1)+"]";
 218         }
 219
 220         private String genArray(int i){
 221                         return "mjvm_arrays["+ i +"]";
 222         }
 223
 224         private String genArray(String i){
 225                         return "mjvm_arrays["+ i+"]";
 226         }
 227
 228         private String genObject(String i){
 229                         return "mjvm_objects["+ i+"]";
 230         }
 231
 232         /**
 233          * Creates a WSL comment with care to quote chars.
 234          */
 235         public static String createComment(String str){
 236                 return createComment(str, C_REG);
 237         }
 238
 239         /**
 240          * Creates a WSL comment with care to quote chars, of the
 241          * given type.  Types are given as char constants. They can be
 242          * default comments, comments that contain the original code
 243          * in them, or additional comments regarding the translation
 244          * process.
 245          */
 246         public static String createComment(String str, char type) {
 247                 return "C:\"" + type + str.replace("\"", "''") + "\";";
 248         }
 249
 250         //Expression stack
 251
 252         private String cmdToEStack(int i) {
 253                 String res = "mjvm_estack := <" + i + " > ++ mjvm_estack;";
 254                 if (genPrintEStackOnChange) res +="PRINT(\"eStack\",mjvm_estack);";
 255                 return res;
 256         }
 257
 258         private String cmdToEStack(String i) {
 259                 String res = "mjvm_estack := <" + i + " > ++ mjvm_estack;";
 260                 if (genPrintEStackOnChange) res +="PRINT(\"eStack\",mjvm_estack);";
 261                 return res;
 262         }
 263
 264         private String cmdFromEStack(String st) {
 265                 String res = st + " := HEAD(mjvm_estack); mjvm_estack := TAIL(mjvm_estack);";
 266                 if (genPrintEStackOnChange) res +="PRINT(\"eStack\",mjvm_estack);";
 267                 return res;
 268         }
 269
 270         private String cmdPopEStack() {
 271                 String res = "mjvm_estack := TAIL(mjvm_estack);";
 272                 if (genPrintEStackOnChange) res +="PRINT(\"eStack\",mjvm_estack);";
 273                 return res;
 274         }
 275
 276
 277         private String getTopTwo(){
 278                 return cmdFromEStack("tempa") + "\n" + cmdFromEStack("tempb");
 279         }
 280
 281         private String getTop() {
 282                 return cmdFromEStack("tempa");
 283         }
 284
 285         //Method stack
 286
 287         private String cmdToMStack(int i) {
 288                 return "mjvm_mstack := <" + i + " > ++ mjvm_mstack;";
 289         }
 290
 291         private String cmdToMStack(String i) {
 292                 return "mjvm_mstack := <" + i + " > ++ mjvm_mstack;";
 293         }
 294
 295         private String cmdFromMStack(String st) {
 296                 return st + " := HEAD(mjvm_mstack); mjvm_mstack := TAIL(mjvm_mstack);";
 297         }
 298
 299         private String getRelationFor(int opcode) throws Exception {
 300                         switch (opcode) {
 301                                         case jeq: return "=";
 302                                         case jne: return "<>";
 303                                         case jlt: return "<";
 304                                         case jle: return "<=";
 305                                         case jgt: return ">";
 306                                         case jge: return ">=";
 307                         }
 308                         throw new Exception("Wrong opcode for a relation");
 309         }
 310
 311         private boolean isJumpCode(int opcode) {
 312                         return (opcode>=jmp) && (opcode<=jge);
 313         }
 314
 315         public void convertStream(InputStream ins) throws Exception{
 316                 mainIn = ins;
 317                 //process start
 318                 byte m = (byte) get();
 319                 byte j = (byte) get();
 320                 if (m!='M' || j !='J')
 321                                 throw new Exception("Wrong start of bytecode file");
 322                 int codesize = get4();
 323                 int numberOfWords = get4();
 324                 int mainAdr = get4();
 325
 326                 prl(getStandardStart(numberOfWords));
 327                 prl("SKIP;\n ACTIONS A_S_start:\n A_S_start == CALL a"+(14+mainAdr)+" END");
 328                 int op = get();
 329                 while (op >= 0) {
 330                         if (originalInComments)
 331                                 prl(createComment(describeOpCode(op), C_OC));
 332                         prl("a" + counter + " == ");
 333                         if (genPrintForEachAddress) {
 334                                         prl("PRINT(\"a"+counter+"\");");
 335                                         if (genPauseAfterEachAddress)
 336                                                         prl("debug_disposable_string := @Read_Line(Standard_Input_Port);");
 337                         }
 338                         switch (op) {
 339                         case load: {
 340                                 prl(cmdToEStack(loc(get())));
 341                                 break;
 342                         }
 343                         case load_0:
 344                         case load_1:
 345                         case load_2:
 346                         case load_3: {
 347                                 prl(cmdToEStack(loc(op - load_0)));
 348                                 break;
 349                         }
 350                         case store: {
 351                                 prl(cmdFromEStack(loc(get())));
 352                                 break;
 353                         }
 354                         case store_0:
 355                         case store_1:
 356                         case store_2:
 357                         case store_3: {
 358                                 prl(cmdFromEStack(loc(op - store_0)));
 359                                 break;
 360                         }
 361
 362                         case getstatic:{
 363                                 prl(cmdToEStack(genStatic(get2())));
 364                                 break;
 365                         }
 366                         case putstatic: {
 367                                 prl(cmdFromEStack(genStatic(get2())));
 368                                 break;
 369                         }
 370
 371                         case getfield:{
 372                                         int f = get2();
 373                                         prl(getTop());
 374                                         prl(cmdToEStack(genObject("tempa")+"["+(f+1)+"]"));
 375                                         break;
 376                         }
 377                         case putfield:{
 378                                         int f = get2();
 379                                         //we need to use a temparray as a pointer, WSL
 380                                         //otherwise tries to access it as a list of lists and fails
 381                                         prl(getTopTwo());
 382                                         prl("VAR < tempArray := "+genObject("tempb")+" > :");
 383                                         prl("tempArray["+(f+1)+"]:=tempa ENDVAR;");
 384                                         break;
 385                         }
 386
 387                         case const_: {
 388                                 prl(cmdToEStack(get4()));
 389                                 break;
 390                         }
 391
 392                         case const_0:
 393                         case const_1:
 394                         case const_2:
 395                         case const_3:
 396                         case const_4:
 397                         case const_5: {
 398                                 prl(cmdToEStack(op - const_0));
 399                                 break;
 400                         }
 401
 402                         case add: {
 403                                 prl(getTopTwo());
 404                                 prl("tempres := tempb + tempa;");
 405                                 prl(cmdToEStack("tempres"));
 406                                 break;
 407                         }
 408                         case sub: {
 409                                 prl(getTopTwo());
 410                                 prl("tempres := tempb - tempa;");
 411                                 prl(cmdToEStack("tempres"));
 412                                 break;
 413                         }
 414                         case mul: {
 415                                 prl(getTopTwo());
 416                                 prl("tempres := tempb * tempa;");
 417                                 prl(cmdToEStack("tempres"));
 418                                 break;
 419                         }
 420                         case div: {
 421                                 prl(getTopTwo());
 422                                 prl("IF tempa = 0 THEN ERROR(\"division by zero\") FI;");
 423                                 prl("tempres := tempb DIV tempa;");
 424                                 prl(cmdToEStack("tempres"));
 425                                 break;
 426                         }
 427                         case rem: {
 428                                 prl(getTopTwo());
 429                                 prl("IF tempa = 0 THEN ERROR(\"division by zero\") FI;");
 430                                 prl("tempres := tempb MOD tempa;");
 431                                 prl(cmdToEStack("tempres"));
 432                                 break;
 433                         }
 434
 435                         case neg :{
 436                                 prl(getTop());
 437                                 prl(cmdToEStack("-tempa"));
 438                                 break;
 439                         }
 440
 441                         case shl  : {
 442                                 prl(getTopTwo());
 443                                 prl("VAR <tempres :=tempb, i:=1 >:");
 444                                 prl("\tFOR i:=1 TO tempa STEP 1 DO tempres := tempres * 2 OD;");
 445                                 prl(cmdToEStack("tempres"));
 446                                 prl("ENDVAR;");
 447                                 break;
 448                         }
 449                         case shr  : {
 450                                 prl(getTopTwo());
 451                                 prl("VAR <tempres :=tempb, i:=1 >:");
 452                                 prl("\tFOR i:=1 TO tempa STEP 1 DO tempres := tempres DIV 2 OD;");
 453                                 prl(cmdToEStack("tempres"));
 454                                 prl("ENDVAR;");
 455                                 break;
 456                         }
 457
 458                         case inc  : {
 459                                 int b1 = get(), b2 = get();
 460                                 prl(loc(b1)+" := " +loc(b1)+" + "+b2+";");
 461                                 break;
 462                         }
 463
 464                         case new_ :{
 465                                         int size = get2();
 466                                         //TODO maybe objects and arrays should be in the same list?
 467                                         prl("mjvm_objects := mjvm_objects ++ < ARRAY("+size+",0) >;");
 468                                         prl(cmdToEStack("LENGTH(mjvm_objects)"));
 469                                         break;
 470                         }
 471                         case newarray :{
 472                                         get();// 0 - bytes, 1 - words; ignore for now
 473                                         //TODO take into consideration 0/1
 474                                         prl(getTop());
 475                                         prl("mjvm_arrays := mjvm_arrays ++ < ARRAY(tempa,0) >;");
 476                                         prl(cmdToEStack("LENGTH(mjvm_arrays)"));
 477                                         break;
 478                         }
 479
 480                         case aload:
 481                         case baload:{
 482                                 prl(getTopTwo());
 483                                 prl(cmdToEStack(genArray("tempb")+"[tempa+1]"));
 484                                 break;
 485                         }
 486                         case astore:
 487                         case bastore:{
 488                                 prl(cmdFromEStack("tempres"));
 489                                 prl(getTopTwo());
 490                                 //we need to use a temparray as a pointer, WSL
 491                                 //otherwise tries to access it as a list of lists and fails
 492                                 prl("VAR < tempArray := "+genArray("tempb")+" > :");
 493                                 prl("tempArray[tempa+1]:=tempres ENDVAR;");
 494                                 break;
 495                         }
 496                         case arraylength :{
 497                                 prl(getTop());
 498                                 //TODO make an array length function of some sort!
 499                                 prl(createComment("array length not known - LENGTH not aplicable to arrays",C_ERR));
 500                                 message("array length not known - LENGTH not aplicable to arrays",M_ERR);
 501                                 prl(createComment("put 1 on the stack for consistency",C_SPEC));
 502                                 prl(cmdToEStack(1));
 503                                 break;
 504                         }
 505
 506                         case dup : {
 507                                         prl(getTop());
 508                                         prl(cmdToEStack("tempa"));
 509                                         prl(cmdToEStack("tempa"));
 510                                         break;
 511                         }
 512                         case dup2 : {
 513                                         prl(getTopTwo());
 514                                         prl(cmdToEStack("tempb"));
 515                                         prl(cmdToEStack("tempa"));
 516                                         prl(cmdToEStack("tempb"));
 517                                         prl(cmdToEStack("tempa"));
 518                                         break;
 519                         }
 520
 521                         case pop : {
 522                                         prl(cmdPopEStack());
 523                                         break;
 524                         }
 525
 526                         case jmp: {
 527                                 prl("CALL a" + (counter + get2()) + ";");
 528                                 break;
 529                         }
 530
 531                         case jeq:
 532                         case jne:
 533                         case jlt:
 534                         case jle:
 535                         case jgt:
 536                         case jge: {
 537                                 prl(getTopTwo());
 538                                 prl("IF tempb "+ getRelationFor(op)
 539                                                 +" tempa THEN CALL a" + (counter + get2())
 540                                                 +" ELSE CALL a" + (counter+1)
 541                                                 + " FI;");
 542                                 break;
 543                         }
 544
 545                         case call: {
 546                                 prl("CALL a" + (counter + get2()) + ";");
 547                                 break;
 548                         }
 549
 550                         case return_: {
 551                                 //we let the actions return
 552                                 // there is nothing to clean up
 553                                 prl("SKIP END b"+counter+" ==");
 554                                 break;
 555                         }
 556                         case enter: {
 557                                 int parameters = get();
 558
 559                                 int locals = get();
 560                                 prl(cmdToMStack("mjvm_locals"));
 561                                 prl("mjvm_locals := ARRAY("+locals+",0);");
 562                                 for (int i = parameters-1; i >= 0; i--)
 563                                                 prl(cmdFromEStack(loc(i)));
 564                                 break;
 565                         }
 566                         case exit: {
 567                                 prl(cmdFromMStack("mjvm_locals"));
 568                                 break;
 569                         }
 570
 571                         // read, print
 572                         case bread:{
 573                                 //TODO make it a char for read
 574                                 message("char is read like a number", M_WAR);
 575                                 prl(createComment("char is read like a number",C_SPEC));
 576                         }
 577                         case read: {
 578                                 prl("tempa := @String_To_Num(@Read_Line(Standard_Input_Port));");
 579                                 prl(cmdToEStack("tempa"));
 580                                 break;
 581                         }
 582
 583                         // the prints
 584                         case bprint:{
 585                                 // TODO need to make it a char on print
 586                                 message("chars will be printed as number codes", M_WAR);
 587                                 prl(createComment("char will be printed as a number code",C_SPEC));
 588                         }
 589                         case print: {
 590                                 // TODO printing numbers needs different lengths of spacing
 591                                 prl(getTopTwo());
 592                                 pr(createComment("print spacing",C_SPEC));
 593                                 prl("IF tempa>1 THEN FOR i:=2 TO tempa STEP 1 DO PRINFLUSH(\" \") OD FI;");
 594                                 prl("PRINFLUSH(tempb);");
 595                                 break;
 596                         }
 597
 598                         case trap: {
 599                                 prl("ERROR(\"Runtime error: trap("+get()+")\");");
 600                                 break;
 601                         }
 602
 603
 604                         default:
 605                                 prl(createComment("unknown op error: " + op, C_ERR));
 606                                 message("unknown op error: "+ op, M_ERR);
 607                                 break;
 608                         }
 609
 610                         boolean wasJump = isJumpCode(op);
 611                         op = get();
 612                         if (op >= 0)
 613                                 if (wasJump)
 614                                                 prl("SKIP END");
 615                                 else
 616                                                 prl("CALL a" + counter + " END");
 617                 }
 618                 prl("CALL Z;\nSKIP END\nENDACTIONS;\n");
 619                 prl(getStandardEnd());
 620
 621         }
 622
 623         public void convertFile(File f) {
 624                 try {
 625                         convertStream(new FileInputStream(f));
 626                 } catch (Exception ex) {
 627                         ex.printStackTrace();
 628                 }
 629         }
 630
 631         public void printHelp() {
 632                 System.out.println("MicroJava bytecode to WSL converter. v " + versionN
 633                                 + ", by Doni Pracner");
 634                 System.out.println("usage:\n\t mjc2wsl {options} filename [outfile]");
 635                 System.out.println("options:\n\t--screen print output to screen");
 636                 System.out.println("\t-o --oc[+-] include original code in comments");
 637                 System.out.println("\t-v verbose, print warning messages");
 638                 System.out.println("\t-q don't print even the error messages");
 639                 System.out.println("\t-d print detailed debug messages");
 640         }
 641
 642         public String makeDefaultOutName(String inname){
 643                 String rez = inname;
 644                 if (inname.endsWith(".obj"))
 645                         rez = rez.substring(0, rez.length() - 4);
 646                 return rez + ".wsl";
 647         }
 648
 649         public void run(String[] args) {
 650                 if (args.length == 0) {
 651                         printHelp();
 652                 } else {
 653                         int i = 0;
 654                         while (i < args.length && args[i].charAt(0) == '-') {
 655                                 if (args[i].compareTo("-h") == 0) {
 656                                         printHelp();
 657                                         return;
 658                                 } else if (args[i].compareTo("-o") == 0
 659                                                 || args[i].startsWith("--oc")) {
 660                                         if (args[i].length() == 2)
 661                                                 originalInComments = true;
 662                                         else if (args[i].length() == 5)
 663                                                 originalInComments = args[i].charAt(4) == '+';
 664                                         else
 665                                                 originalInComments = true;
 666                                 } else if (args[i].compareTo("--screen") == 0) {
 667                                         out = new PrintWriter(System.out);
 668                                 } else if (args[i].compareTo("-d") == 0) {
 669                                         printLevel = M_DEB;//print debug info
 670                                 } else if (args[i].compareTo("-v") == 0) {
 671                                         printLevel = M_WAR;//print warnings
 672                                 } else if (args[i].compareTo("-q") == 0) {
 673                                         printLevel = M_ERR+1;//no printing
 674                                 } else if (args[i].compareToIgnoreCase("--genEStackPrint") == 0) {
 675                                         genPrintEStackOnChange = true;
 676                                 } else if (args[i].compareToIgnoreCase("--genAddrPause") == 0) {
 677                                         genPauseAfterEachAddress = true;
 678                                 } else if (args[i].compareToIgnoreCase("--genAddrPrint") == 0) {
 679                                         genPrintForEachAddress = true;
 680                                 } else if (args[i].compareToIgnoreCase("--genAddr") == 0) {
 681                                         genPrintForEachAddress = true;
 682                                         genPauseAfterEachAddress = true;
 683                                 } else if (args[i].compareToIgnoreCase("--genAll") == 0) {
 684                                         genPrintEStackOnChange = true;
 685                                         genPrintForEachAddress = true;
 686                                         genPauseAfterEachAddress = true;
 687                                 }i++;
 688                         }
 689
 690                         if (i >= args.length) {
 691                                 System.out.println("no filename supplied");
 692                                 System.exit(2);
 693                         }
 694                         File f = new File(args[i]);
 695
 696                         if (i + 1 < args.length) {
 697                                 try {
 698                                         out = new PrintWriter(args[i + 1]);
 699                                 } catch (Exception e) {
 700                                         System.err.println("error in opening out file:");
 701                                         e.printStackTrace();
 702                                 }
 703                         }
 704                         if (out == null) {
 705                                 // if not set to screen, or a file, make a default filename
 706                                 try {
 707                                         out = new PrintWriter(makeDefaultOutName(args[i]));
 708                                 } catch (Exception e) {
 709                                         System.err.println("error in opening out file:");
 710                                         e.printStackTrace();
 711                                 }
 712                         }
 713                         if (f.exists()) {
 714                                 Calendar now = Calendar.getInstance();
 715                                 convertFile(f);
 716                                 long mili = Calendar.getInstance().getTimeInMillis()
 717                                                 - now.getTimeInMillis();
 718                                 System.out.println("conversion time:" + mili + " ms");
 719                                 printMessageCounters();
 720                                 out.close();
 721                         } else
 722                                 System.out.println("file does not exist");
 723                 }
 724         }
 725
 726         public static void main(String[] args) {
 727                 new mjc2wsl().run(args);
 728         }
 729 }