src/mjc2wsl.java

   1 /*
   2    Copyright (C) 2014  Doni Pracner
   3
   4     This file is part of mjc2wsl.
   5
   6     mjc2wsl is free software: you can redistribute it and/or modify
   7     it under the terms of the GNU General Public License as published by
   8     the Free Software Foundation, either version 3 of the License, or
   9     (at your option) any later version.
  10
  11     mjc2wsl is distributed in the hope that it will be useful,
  12     but WITHOUT ANY WARRANTY; without even the implied warranty of
  13     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14     GNU General Public License for more details.
  15
  16     You should have received a copy of the GNU General Public License
  17     along with mjc2wsl.  If not, see <http://www.gnu.org/licenses/>.
  18 */
  19 import java.io.*;
  20 import java.util.*;
  21
  22 /**
  23  * This program converts file from compiled MicroJava bytecode to WSL language
  24  * which is a part of the FermaT Transformation system. MicroJava is a subset
  25  * used in Compiler Construction courses by Hanspeter Moessenboeck, not
  26  * "Java ME".
  27  *
  28  * @author Doni Pracner, http://perun.dmi.rs/pracner http://quemaster.com
  29  */
  30 public class mjc2wsl{
  31         public static String versionN = "0.1.5";
  32
  33         private TransMessages messages = new TransMessages();
  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         private boolean originalInComments = false;
 112
 113         private HashMap<Integer,String> opMap = null;
 114
 115         private String opCodeFile = "mj-bytecodes.properties";
 116
 117         private HashMap<Integer, String> getOpMap() {
 118                 if (opMap == null) {
 119                         opMap = new HashMap<Integer, String>(60, 0.98f);
 120                         try {
 121                                 BufferedReader in = new BufferedReader(new InputStreamReader(
 122                                                 getClass().getResourceAsStream(opCodeFile)));
 123                                 String str = in.readLine();
 124                                 while (str != null) {
 125                                         String[] ss = str.split("=");
 126                                         opMap.put(Integer.parseInt(ss[0]), ss[1]);
 127                                         str = in.readLine();
 128                                 }
 129                                 in.close();
 130                         } catch (Exception ex) {
 131                                 ex.printStackTrace();
 132                         }
 133                 }
 134                 return opMap;
 135         }
 136
 137         public String getOpString(int op) {
 138                 return getOpMap().get(op);
 139         }
 140
 141         public String describeOpCode(int op) {
 142                 return op + " (" + getOpString(op) + ")";
 143         }
 144
 145         private InputStream mainIn;
 146         private PrintWriter out = null;
 147         private int counter = -1;
 148
 149         private void pr(int i){
 150                         out.print(i);
 151         }
 152
 153         private void pr(char i){
 154                         out.print(i);
 155         }
 156
 157         private void pr(String i){
 158                         out.print(i);
 159         }
 160
 161         private void prl(String i){
 162                         out.println(i);
 163         }
 164
 165         private int get() {
 166                 int res = -1;
 167                 try {
 168                         res = mainIn.read();
 169                         if (res >= 0)
 170                                 res = res << 24 >>> 24;
 171                 } catch (IOException ex) {
 172                         ex.printStackTrace();
 173                 }
 174                 counter++;
 175                 return res;
 176         }
 177
 178         private int get2() {
 179                 return (get() * 256 + get()) << 16 >> 16;
 180         }
 181
 182         private int get4() {
 183                 return (get2() << 16) + (get2() << 16 >>> 16);
 184         }
 185
 186         public String createStandardStart(){
 187                         return createStandardStart(10);
 188         }
 189
 190         public String createStandardStart(int numWords){
 191                 StringBuilder ret = new StringBuilder(
 192                         "C:\" This file automatically converted from microjava bytecode\";\n"
 193                         +"C:\" with mjc2wsl v "+versionN+"\";\n");
 194
 195                 ret.append("BEGIN ");
 196                 ret.append("VAR < tempa := 0, tempb := 0, tempres :=0,\n\t");
 197                 ret.append("mjvm_locals := ARRAY(1,0), ");
 198                 ret.append("\n\tmjvm_statics := ARRAY("+numWords+",0), ");
 199                 ret.append("\n\tmjvm_arrays := < >, ");
 200                 ret.append("\n\tmjvm_objects := < >, ");
 201                 ret.append("\n  mjvm_estack := < >, mjvm_mstack := < > > : ");
 202
 203                 return ret.toString();
 204         }
 205
 206         public String createStandardEnd(){
 207                 StringBuilder ret = new StringBuilder("SKIP\nENDVAR");
 208                 ret.append("\nWHERE\n");
 209
 210                 ret.append("\nPROC Print_MJ(val, format VAR)==\n");
 211                 ret.append(createComment("print spacing", C_SPEC));
 212
 213                 ret.append("\n\tIF format>1 THEN\n\t\tFOR i:=2 TO ");
 214                 ret.append("format STEP 1 DO PRINFLUSH(\" \") OD\n");
 215                 ret.append("\tFI;\n\tPRINFLUSH(val)\nEND\n");
 216
 217                 ret.append("\nEND\n");
 218
 219                 return ret.toString();
 220         }
 221
 222         private String createStartVar(String... vars){
 223                 StringBuilder ret = new StringBuilder("VAR < ");
 224                 ret.append(vars[0] + " := 0");
 225                 for (int i=1; i<vars.length; i++)
 226                                 ret.append(", "+ vars[i] +" := 0");
 227                 ret.append(" > : ");
 228
 229                 return ret.toString();
 230         }
 231
 232         private String createEndVar(){
 233                 return "ENDVAR;";
 234         }
 235
 236         private String createLocal(int i) {
 237                 // arrays start at 1 in WSL, so we need an offset
 238                 return "mjvm_locals[" + (i + 1) + "]";
 239         }
 240
 241         private String createStatic(int i) {
 242                 return "mjvm_statics[" + (i + 1) + "]";
 243         }
 244
 245         private String createArray(int i) {
 246                 return "mjvm_arrays[" + i + "]";
 247         }
 248
 249         private String createArray(String i) {
 250                 return "mjvm_arrays[" + i + "]";
 251         }
 252
 253         private String createObject(String i) {
 254                 return "mjvm_objects[" + i + "]";
 255         }
 256
 257         /**
 258          * Creates a WSL comment with care to quote chars.
 259          */
 260         public static String createComment(String str){
 261                 return createComment(str, C_REG);
 262         }
 263
 264         /**
 265          * Creates a WSL comment with care to quote chars, of the
 266          * given type.  Types are given as char constants. They can be
 267          * default comments, comments that contain the original code
 268          * in them, or additional comments regarding the translation
 269          * process.
 270          */
 271         public static String createComment(String str, char type) {
 272                 return "C:\"" + type + str.replace("\"", "''") + "\";";
 273         }
 274
 275         //Expression stack
 276
 277         private String createToEStack(int i) {
 278                 String res = "mjvm_estack := <" + i + " > ++ mjvm_estack;";
 279                 if (genPrintEStackOnChange)
 280                         res += "PRINT(\"eStack\",mjvm_estack);";
 281                 return res;
 282         }
 283
 284         private String createToEStack(String i) {
 285                 String res = "mjvm_estack := <" + i + " > ++ mjvm_estack;";
 286                 if (genPrintEStackOnChange)
 287                         res += "PRINT(\"eStack\",mjvm_estack);";
 288                 return res;
 289         }
 290
 291         private String createFromEStack(String st) {
 292                 String res = st
 293                                 + " := HEAD(mjvm_estack); mjvm_estack := TAIL(mjvm_estack);";
 294                 if (genPrintEStackOnChange)
 295                         res += "PRINT(\"eStack\",mjvm_estack);";
 296                 return res;
 297         }
 298
 299         private String createPopEStack() {
 300                 String res = "mjvm_estack := TAIL(mjvm_estack);";
 301                 if (genPrintEStackOnChange)
 302                         res += "PRINT(\"eStack\",mjvm_estack);";
 303                 return res;
 304         }
 305
 306         private String createTopTwoEStack() {
 307                 return createFromEStack("tempa") + "\n" + createFromEStack("tempb");
 308         }
 309
 310         private String createTopEStack() {
 311                 return createFromEStack("tempa");
 312         }
 313
 314         //Method stack
 315
 316         private String createToMStack(int i) {
 317                 return "mjvm_mstack := <" + i + " > ++ mjvm_mstack;";
 318         }
 319
 320         private String createToMStack(String i) {
 321                 return "mjvm_mstack := <" + i + " > ++ mjvm_mstack;";
 322         }
 323
 324         private String createFromMStack(String st) {
 325                 return st + " := HEAD(mjvm_mstack); mjvm_mstack := TAIL(mjvm_mstack);";
 326         }
 327
 328         private String getRelationFor(int opcode) throws Exception {
 329                 switch (opcode) {
 330                                 case jeq: return "=";
 331                                 case jne: return "<>";
 332                                 case jlt: return "<";
 333                                 case jle: return "<=";
 334                                 case jgt: return ">";
 335                                 case jge: return ">=";
 336                 }
 337                 throw new Exception("Wrong opcode for a relation");
 338         }
 339
 340         private boolean isJumpCode(int opcode) {
 341                 return (opcode >= jmp) && (opcode <= jge);
 342         }
 343
 344         public void convertStream(InputStream ins) throws Exception{
 345                 mainIn = ins;
 346                 //process start
 347                 byte m = (byte) get();
 348                 byte j = (byte) get();
 349                 if (m!='M' || j !='J')
 350                                 throw new Exception("Wrong start of bytecode file");
 351                 int codesize = get4();
 352                 int numberOfWords = get4();
 353                 int mainAdr = get4();
 354
 355                 prl(createStandardStart(numberOfWords));
 356                 prl("SKIP;\n ACTIONS a" + (14 + mainAdr) + " :");
 357                 int op = get();
 358                 while (op >= 0) {
 359                         if (originalInComments)
 360                                 prl(createComment(describeOpCode(op), C_OC));
 361                         prl(" a" + counter + " == ");
 362                         if (genPrintForEachAddress) {
 363                                 prl("PRINT(\"a" + counter + "\");");
 364                                 if (genPauseAfterEachAddress)
 365                                         prl("debug_disposable_string := @Read_Line(Standard_Input_Port);");
 366                         }
 367                         switch (op) {
 368                         case load: {
 369                                 prl(createToEStack(createLocal(get())));
 370                                 break;
 371                         }
 372                         case load_0:
 373                         case load_1:
 374                         case load_2:
 375                         case load_3: {
 376                                 prl(createToEStack(createLocal(op - load_0)));
 377                                 break;
 378                         }
 379                         case store: {
 380                                 prl(createFromEStack(createLocal(get())));
 381                                 break;
 382                         }
 383                         case store_0:
 384                         case store_1:
 385                         case store_2:
 386                         case store_3: {
 387                                 prl(createFromEStack(createLocal(op - store_0)));
 388                                 break;
 389                         }
 390
 391                         case getstatic: {
 392                                 prl(createToEStack(createStatic(get2())));
 393                                 break;
 394                         }
 395                         case putstatic: {
 396                                 prl(createFromEStack(createStatic(get2())));
 397                                 break;
 398                         }
 399
 400                         case getfield: {
 401                                 int f = get2();
 402                                 prl(createTopEStack());
 403                                 prl(createToEStack(createObject("tempa") + "[" + (f + 1) + "]"));
 404                                 break;
 405                         }
 406                         case putfield: {
 407                                 int f = get2();
 408                                 // we need to use a temparray as a pointer, WSL
 409                                 // otherwise tries to access it as a list of lists and fails
 410                                 prl(createTopTwoEStack());
 411                                 prl("VAR < tempArray := " + createObject("tempb") + " > :");
 412                                 prl("tempArray[" + (f + 1) + "]:=tempa ENDVAR;");
 413                                 break;
 414                         }
 415
 416                         case const_: {
 417                                 prl(createToEStack(get4()));
 418                                 break;
 419                         }
 420
 421                         case const_0:
 422                         case const_1:
 423                         case const_2:
 424                         case const_3:
 425                         case const_4:
 426                         case const_5: {
 427                                 prl(createToEStack(op - const_0));
 428                                 break;
 429                         }
 430
 431                         case add: {
 432                                 prl(createTopTwoEStack());
 433                                 prl("tempres := tempb + tempa;");
 434                                 prl(createToEStack("tempres"));
 435                                 break;
 436                         }
 437                         case sub: {
 438                                 prl(createTopTwoEStack());
 439                                 prl("tempres := tempb - tempa;");
 440                                 prl(createToEStack("tempres"));
 441                                 break;
 442                         }
 443                         case mul: {
 444                                 prl(createTopTwoEStack());
 445                                 prl("tempres := tempb * tempa;");
 446                                 prl(createToEStack("tempres"));
 447                                 break;
 448                         }
 449                         case div: {
 450                                 prl(createStartVar("tempa", "tempb", "tempres"));
 451                                 prl(createTopTwoEStack());
 452                                 prl("IF tempa = 0 THEN ERROR(\"division by zero\") FI;");
 453                                 prl("tempres := tempb DIV tempa;");
 454                                 prl(createToEStack("tempres"));
 455                                 prl(createEndVar());
 456                                 break;
 457                         }
 458                         case rem: {
 459                                 prl(createStartVar("tempa", "tempb", "tempres"));
 460                                 prl(createTopTwoEStack());
 461                                 prl("IF tempa = 0 THEN ERROR(\"division by zero\") FI;");
 462                                 prl("tempres := tempb MOD tempa;");
 463                                 prl(createToEStack("tempres"));
 464                                 prl(createEndVar());
 465                                 break;
 466                         }
 467
 468                         case neg: {
 469                                 prl(createTopEStack());
 470                                 prl(createToEStack("-tempa"));
 471                                 break;
 472                         }
 473
 474                         case shl: {
 475                                 prl(createTopTwoEStack());
 476                                 prl("VAR <tempres :=tempb, i:=1 >:");
 477                                 prl("\tFOR i:=1 TO tempa STEP 1 DO tempres := tempres * 2 OD;");
 478                                 prl(createToEStack("tempres"));
 479                                 prl("ENDVAR;");
 480                                 break;
 481                         }
 482                         case shr: {
 483                                 prl(createTopTwoEStack());
 484                                 prl("VAR <tempres :=tempb, i:=1 >:");
 485                                 prl("\tFOR i:=1 TO tempa STEP 1 DO tempres := tempres DIV 2 OD;");
 486                                 prl(createToEStack("tempres"));
 487                                 prl("ENDVAR;");
 488                                 break;
 489                         }
 490
 491                         case inc: {
 492                                 int b1 = get(), b2 = get();
 493                                 prl(createLocal(b1) + " := " + createLocal(b1) + " + " + b2 + ";");
 494                                 break;
 495                         }
 496
 497                         case new_: {
 498                                 int size = get2();
 499                                 // TODO maybe objects and arrays should be in the same list?
 500                                 prl("mjvm_objects := mjvm_objects ++ < ARRAY(" + size
 501                                                 + ",0) >;");
 502                                 prl(createToEStack("LENGTH(mjvm_objects)"));
 503                                 break;
 504                         }
 505                         case newarray: {
 506                                 get();// 0 - bytes, 1 - words; ignore for now
 507                                 // TODO take into consideration 0/1
 508                                 prl(createTopEStack());
 509                                 prl("mjvm_arrays := mjvm_arrays ++ < ARRAY(tempa,0) >;");
 510                                 prl(createToEStack("LENGTH(mjvm_arrays)"));
 511                                 break;
 512                         }
 513
 514                         case aload:
 515                         case baload: {
 516                                 prl(createTopTwoEStack());
 517                                 prl(createToEStack(createArray("tempb") + "[tempa+1]"));
 518                                 break;
 519                         }
 520                         case astore:
 521                         case bastore: {
 522                                 prl(createFromEStack("tempres"));
 523                                 prl(createTopTwoEStack());
 524                                 // we need to use a temparray as a pointer, WSL
 525                                 // otherwise tries to access it as a list of lists and fails
 526                                 prl("VAR < tempArray := " + createArray("tempb") + " > :");
 527                                 prl("tempArray[tempa+1]:=tempres ENDVAR;");
 528                                 break;
 529                         }
 530                         case arraylength: {
 531                                 prl(createTopEStack());
 532                                 prl("tempb := LENGTH("+ createArray("tempa") + ");");
 533                                 prl(createToEStack("tempb"));
 534                                 break;
 535                         }
 536
 537                         case dup: {
 538                                 prl(createTopEStack());
 539                                 prl(createToEStack("tempa"));
 540                                 prl(createToEStack("tempa"));
 541                                 break;
 542                         }
 543                         case dup2: {
 544                                 prl(createTopTwoEStack());
 545                                 prl(createToEStack("tempb"));
 546                                 prl(createToEStack("tempa"));
 547                                 prl(createToEStack("tempb"));
 548                                 prl(createToEStack("tempa"));
 549                                 break;
 550                         }
 551
 552                         case pop: {
 553                                 prl(createPopEStack());
 554                                 break;
 555                         }
 556
 557                         case jmp: {
 558                                 prl("CALL a" + (counter + get2()) + ";");
 559                                 break;
 560                         }
 561
 562                         case jeq:
 563                         case jne:
 564                         case jlt:
 565                         case jle:
 566                         case jgt:
 567                         case jge: {
 568                                 prl(createTopTwoEStack());
 569                                 prl("IF tempb " + getRelationFor(op) + " tempa THEN CALL a"
 570                                                 + (counter + get2()) + " ELSE CALL a" + (counter + 1)
 571                                                 + " FI;");
 572                                 break;
 573                         }
 574
 575                         case call: {
 576                                 prl("CALL a" + (counter + get2()) + ";");
 577                                 break;
 578                         }
 579
 580                         case return_: {
 581                                 // we let the actions return
 582                                 // there is nothing to clean up
 583                                 prl("SKIP\n END\n b" + counter + " ==");
 584                                 break;
 585                         }
 586                         case enter: {
 587                                 int parameters = get();
 588
 589                                 int locals = get();
 590                                 prl(createToMStack("mjvm_locals"));
 591                                 prl("mjvm_locals := ARRAY(" + locals + ",0);");
 592                                 for (int i = parameters - 1; i >= 0; i--)
 593                                         prl(createFromEStack(createLocal(i)));
 594                                 break;
 595                         }
 596                         case exit: {
 597                                 prl(createFromMStack("mjvm_locals"));
 598                                 break;
 599                         }
 600
 601                         // read, print
 602                         case bread: {
 603                                 // TODO make it a char for read
 604                                 messages.message("char is read like a number", TransMessages.M_WAR);
 605                                 prl(createComment("char is read like a number", C_SPEC));
 606                         }
 607                         case read: {
 608                                 prl("tempa := @String_To_Num(@Read_Line(Standard_Input_Port));");
 609                                 prl(createToEStack("tempa"));
 610                                 break;
 611                         }
 612
 613                         // the prints
 614                         case bprint: {
 615                                 // TODO need to make it a char on print
 616                                 messages.message("chars will be printed as number codes", TransMessages.M_WAR);
 617                                 prl(createComment("char will be printed as a number code",
 618                                                 C_SPEC));
 619                         }
 620                         case print: {
 621                                 // TODO printing numbers needs different lengths of spacing
 622                                 prl(createTopTwoEStack());
 623                                 prl("Print_MJ(tempb,tempa);");
 624                                 break;
 625                         }
 626
 627                         case trap: {
 628                                 prl("ERROR(\"Runtime error: trap(" + get() + ")\");");
 629                                 break;
 630                         }
 631
 632                         default:
 633                                 prl(createComment("unknown op error: " + op, C_ERR));
 634                                 messages.message("unknown op error: " + op, TransMessages.M_ERR);
 635                                 break;
 636                         }
 637
 638                         boolean wasJump = isJumpCode(op);
 639                         op = get();
 640                         if (op >= 0)
 641                                 if (wasJump)
 642                                         prl("SKIP\n END");
 643                                 else
 644                                         prl("CALL a" + counter + "\n END");
 645                 }
 646                 prl("SKIP\n END\nENDACTIONS;\n");
 647                 prl(createStandardEnd());
 648         }
 649
 650         public void convertFile(File f) {
 651                 try {
 652                         convertStream(new FileInputStream(f));
 653                 } catch (Exception ex) {
 654                         ex.printStackTrace();
 655                 }
 656         }
 657
 658         public void printHelp() {
 659                 printVersion();
 660                 printUsage();
 661                 printHelpOutput();
 662                 printHelpHelp();
 663         }
 664
 665         public void printLongHelp() {
 666                 printVersion();
 667                 printUsage();
 668                 System.out.println();
 669                 printHelpOutput();
 670                 System.out.println();
 671                 printHelpGenerating();
 672                 System.out.println();
 673                 printHelpHelp();
 674         }
 675
 676         public void printHelpOutput() {
 677                 System.out.println("Output options:");
 678                 System.out.println("  --screen print output to screen");
 679                 System.out.println("  -o --oc[+-] include original code in comments");
 680                 System.out.println("  -v verbose, print warning messages");
 681                 System.out.println("  -q quiet; don't print even the error messages");
 682                 System.out.println("  -d print detailed debug messages");
 683         }
 684
 685         public void printHelpGenerating() {
 686                 System.out.println("Options for generating extra code for tracking code execution");
 687                 System.out.println("  --genEStackPrint generate print for all EStack changes");
 688                 System.out.println("  --genAddrPrint  generate prints after every address of the original code ");
 689                 System.out.println("  --genAddrPause  generate a pause after every address of the original code ");
 690                 System.out.println("  --genAddr  short for --genAddrPrint and --genAddrPause");
 691                 System.out.println("  --genAll   short for applying all code generation");
 692         }
 693
 694         public void printHelpHelp() {
 695                 System.out.println("Help and info options");
 696                 System.out.println("  -h basic help");
 697                 System.out.println("  --help print more detailed help");
 698                 System.out.println("  --version or -version print version and exit");
 699         }
 700
 701         public void printUsage(){
 702                 System.out.println("usage:\n\t mjc2wsl {options} filename [outfile]");
 703         }
 704
 705         public void printVersion() {
 706                 System.out.println("MicroJava bytecode to WSL converter. v " + versionN
 707                                 + ", by Doni Pracner");
 708         }
 709
 710         public String makeDefaultOutName(String inname){
 711                 String rez = inname;
 712                 if (inname.endsWith(".obj"))
 713                         rez = rez.substring(0, rez.length() - 4);
 714                 return rez + ".wsl";
 715         }
 716
 717         public void run(String[] args) {
 718                 if (args.length == 0) {
 719                         printHelp();
 720                 } else {
 721                         int i = 0;
 722                         while (i < args.length && args[i].charAt(0) == '-') {
 723                                 if (args[i].compareTo("-h") == 0) {
 724                                         printHelp();
 725                                         return;
 726                                 } else if (args[i].compareTo("--help") == 0) {
 727                                         printLongHelp();
 728                                         return;
 729                                 } else if (args[i].compareTo("--version") == 0
 730                                                 || args[i].compareTo("-version") == 0) {
 731                                         printVersion();
 732                                         return;
 733                                 } else if (args[i].compareTo("-o") == 0
 734                                                 || args[i].startsWith("--oc")) {
 735                                         if (args[i].length() == 2)
 736                                                 originalInComments = true;
 737                                         else if (args[i].length() == 5)
 738                                                 originalInComments = args[i].charAt(4) == '+';
 739                                         else
 740                                                 originalInComments = true;
 741                                 } else if (args[i].compareTo("--screen") == 0) {
 742                                         out = new PrintWriter(System.out);
 743                                 } else if (args[i].compareTo("-d") == 0) {
 744                                         messages.setPrintLevel(TransMessages.M_DEB);// print debug info
 745                                 } else if (args[i].compareTo("-v") == 0) {
 746                                         messages.setPrintLevel(TransMessages.M_WAR);// print warnings
 747                                 } else if (args[i].compareTo("-q") == 0) {
 748                                         messages.setPrintLevel(TransMessages.M_QUIET);// no printing
 749                                 } else if (args[i].compareToIgnoreCase("--genEStackPrint") == 0) {
 750                                         genPrintEStackOnChange = true;
 751                                 } else if (args[i].compareToIgnoreCase("--genAddrPause") == 0) {
 752                                         genPauseAfterEachAddress = true;
 753                                 } else if (args[i].compareToIgnoreCase("--genAddrPrint") == 0) {
 754                                         genPrintForEachAddress = true;
 755                                 } else if (args[i].compareToIgnoreCase("--genAddr") == 0) {
 756                                         genPrintForEachAddress = true;
 757                                         genPauseAfterEachAddress = true;
 758                                 } else if (args[i].compareToIgnoreCase("--genAll") == 0) {
 759                                         genPrintEStackOnChange = true;
 760                                         genPrintForEachAddress = true;
 761                                         genPauseAfterEachAddress = true;
 762                                 }
 763                                 i++;
 764                         }
 765
 766                         if (i >= args.length) {
 767                                 System.out.println("no filename supplied");
 768                                 System.exit(2);
 769                         }
 770                         File f = new File(args[i]);
 771
 772                         if (i + 1 < args.length) {
 773                                 try {
 774                                         out = new PrintWriter(args[i + 1]);
 775                                 } catch (Exception e) {
 776                                         System.err.println("error in opening out file:");
 777                                         e.printStackTrace();
 778                                 }
 779                         }
 780                         if (out == null) {
 781                                 // if not set to screen, or a file, make a default filename
 782                                 try {
 783                                         out = new PrintWriter(makeDefaultOutName(args[i]));
 784                                 } catch (Exception e) {
 785                                         System.err.println("error in opening out file:");
 786                                         e.printStackTrace();
 787                                 }
 788                         }
 789                         if (f.exists()) {
 790                                 Calendar now = Calendar.getInstance();
 791                                 convertFile(f);
 792                                 long mili = Calendar.getInstance().getTimeInMillis()
 793                                                 - now.getTimeInMillis();
 794                                 System.out.println("conversion time:" + mili + " ms");
 795                                 messages.printMessageCounters();
 796                                 out.close();
 797                         } else
 798                                 System.out.println("file does not exist");
 799                 }
 800         }
 801
 802         public static void main(String[] args) {
 803                 new mjc2wsl().run(args);
 804         }
 805 }