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 = "0.1.6";
  32
  33         private TransMessages messages = new TransMessages();
  34
  35         private boolean genPauseAfterEachAddress=false,
  36                 genPrintForEachAddress = false,
  37                 genPrintEStackOnChange = false;
  38
  39         private boolean genPopPush=false;
  40
  41         /** Constant used for marking a regular comment from the original file */
  42         public static final char C_REG = ' ';
  43         /**
  44          * Constant used for marking when original code is inserted in the file,
  45          * next to the translations
  46          */
  47         public static final char C_OC = '#';
  48         /** Constant used for marking special messages from the translator */
  49         public static final char C_SPEC = '&';
  50         /** Constant used for marking error messages from the translator */
  51         public static final char C_ERR = '!';
  52
  53         /** instruction code in MicroJava bytecode. */
  54         public static final int
  55                 load        =  1,
  56                 load_0      =  2,
  57                 load_1      =  3,
  58                 load_2      =  4,
  59                 load_3      =  5,
  60                 store       =  6,
  61                 store_0     =  7,
  62                 store_1     =  8,
  63                 store_2     =  9,
  64                 store_3     = 10,
  65                 getstatic   = 11,
  66                 putstatic   = 12,
  67                 getfield    = 13,
  68                 putfield    = 14,
  69                 const_0     = 15,
  70                 const_1     = 16,
  71                 const_2     = 17,
  72                 const_3     = 18,
  73                 const_4     = 19,
  74                 const_5     = 20,
  75                 const_m1    = 21,
  76                 const_      = 22,
  77                 add         = 23,
  78                 sub         = 24,
  79                 mul         = 25,
  80                 div         = 26,
  81                 rem         = 27,
  82                 neg         = 28,
  83                 shl         = 29,
  84                 shr         = 30,
  85                 inc         = 31,
  86                 new_        = 32,
  87                 newarray    = 33,
  88                 aload       = 34,
  89                 astore      = 35,
  90                 baload      = 36,
  91                 bastore     = 37,
  92                 arraylength = 38,
  93                 pop         = 39,
  94                 dup         = 40,
  95                 dup2        = 41,
  96                 jmp         = 42,
  97                 jeq         = 43,
  98                 jne         = 44,
  99                 jlt         = 45,
 100                 jle         = 46,
 101                 jgt         = 47,
 102                 jge         = 48,
 103                 call        = 49,
 104                 return_     = 50,
 105                 enter       = 51,
 106                 exit        = 52,
 107                 read        = 53,
 108                 print       = 54,
 109                 bread       = 55,
 110                 bprint      = 56,
 111                 trap            = 57;
 112
 113         private boolean originalInComments = false;
 114
 115         private HashMap<Integer,String> opMap = null;
 116
 117         private String opCodeFile = "mj-bytecodes.properties";
 118
 119         private HashMap<Integer, String> getOpMap() {
 120                 if (opMap == null) {
 121                         opMap = new HashMap<Integer, String>(60, 0.98f);
 122                         try {
 123                                 BufferedReader in = new BufferedReader(new InputStreamReader(
 124                                                 getClass().getResourceAsStream(opCodeFile)));
 125                                 String str = in.readLine();
 126                                 while (str != null) {
 127                                         String[] ss = str.split("=");
 128                                         opMap.put(Integer.parseInt(ss[0]), ss[1]);
 129                                         str = in.readLine();
 130                                 }
 131                                 in.close();
 132                         } catch (Exception ex) {
 133                                 ex.printStackTrace();
 134                         }
 135                 }
 136                 return opMap;
 137         }
 138
 139         public String getOpString(int op) {
 140                 return getOpMap().get(op);
 141         }
 142
 143         public String describeOpCode(int op) {
 144                 return op + " (" + getOpString(op) + ")";
 145         }
 146
 147         private InputStream mainIn;
 148         private PrintWriter out = null;
 149         private int counter = -1;
 150
 151         private void pr(int i){
 152                         out.print(i);
 153         }
 154
 155         private void pr(char i){
 156                         out.print(i);
 157         }
 158
 159         private void pr(String i){
 160                         out.print(i);
 161         }
 162
 163         private void prl(String i){
 164                         out.println(i);
 165         }
 166
 167         private int get() {
 168                 int res = -1;
 169                 try {
 170                         res = mainIn.read();
 171                         if (res >= 0)
 172                                 res = res << 24 >>> 24;
 173                 } catch (IOException ex) {
 174                         ex.printStackTrace();
 175                 }
 176                 counter++;
 177                 return res;
 178         }
 179
 180         private int get2() {
 181                 return (get() * 256 + get()) << 16 >> 16;
 182         }
 183
 184         private int get4() {
 185                 return (get2() << 16) + (get2() << 16 >>> 16);
 186         }
 187
 188         public String createStandardStart(){
 189                         return createStandardStart(10);
 190         }
 191
 192         public String createStandardStart(int numWords){
 193                 StringBuilder ret = new StringBuilder(
 194                         "C:\" This file automatically converted from microjava bytecode\";\n"
 195                         +"C:\" with mjc2wsl v "+versionN+"\";\n");
 196
 197                 ret.append("BEGIN ");
 198                 ret.append("VAR < \n\t");
 199                 ret.append("mjvm_locals := ARRAY(1,0), ");
 200                 ret.append("\n\tmjvm_statics := ARRAY("+numWords+",0), ");
 201                 ret.append("\n\tmjvm_arrays := < >, ");
 202                 ret.append("\n\tmjvm_objects := < >, ");
 203                 ret.append("\n  mjvm_estack := < >, mjvm_mstack := < > > : ");
 204
 205                 return ret.toString();
 206         }
 207
 208         public String createStandardEnd(){
 209                 StringBuilder ret = new StringBuilder("SKIP\nENDVAR");
 210                 ret.append("\nWHERE\n");
 211
 212                 ret.append("\nPROC Print_MJ(val, format VAR)==\n");
 213                 ret.append(createComment("print spacing", C_SPEC));
 214
 215                 ret.append("\n\tIF format>1 THEN\n\t\tFOR i:=2 TO ");
 216                 ret.append("format STEP 1 DO PRINFLUSH(\" \") OD\n");
 217                 ret.append("\tFI;\n\tPRINFLUSH(val)\nEND\n");
 218
 219                 ret.append("\nEND\n");
 220
 221                 return ret.toString();
 222         }
 223
 224         private String createStartVar(String... vars){
 225                 StringBuilder ret = new StringBuilder("VAR < ");
 226                 ret.append(vars[0] + " := 0");
 227                 for (int i=1; i<vars.length; i++)
 228                                 ret.append(", "+ vars[i] +" := 0");
 229                 ret.append(" > : ");
 230
 231                 return ret.toString();
 232         }
 233
 234         private String createEndVar(){
 235                 return "ENDVAR;";
 236         }
 237
 238         private String createLocal(int i) {
 239                 // arrays start at 1 in WSL, so we need an offset
 240                 return "mjvm_locals[" + (i + 1) + "]";
 241         }
 242
 243         private String createStatic(int i) {
 244                 return "mjvm_statics[" + (i + 1) + "]";
 245         }
 246
 247         private String createArray(int i) {
 248                 return "mjvm_arrays[" + i + "]";
 249         }
 250
 251         private String createArray(String i) {
 252                 return "mjvm_arrays[" + i + "]";
 253         }
 254
 255         private String createObject(String i) {
 256                 return "mjvm_objects[" + i + "]";
 257         }
 258
 259         /**
 260          * Creates a WSL comment with care to quote chars.
 261          */
 262         public static String createComment(String str){
 263                 return createComment(str, C_REG);
 264         }
 265
 266         /**
 267          * Creates a WSL comment with care to quote chars, of the
 268          * given type.  Types are given as char constants. They can be
 269          * default comments, comments that contain the original code
 270          * in them, or additional comments regarding the translation
 271          * process.
 272          */
 273         public static String createComment(String str, char type) {
 274                 return "C:\"" + type + str.replace("\"", "''") + "\";";
 275         }
 276
 277         // generalised stack operations
 278
 279         private String createToStack(String stack, String var){
 280                 if (genPopPush)
 281                                 return  "PUSH("+stack+"," + var + ");";
 282                 else
 283                                 return stack + " := <" + var + " > ++ " + stack +";";
 284         }
 285
 286         private String createFromStack(String stack, String var){
 287                 if (genPopPush)
 288                         return "POP("+ var + ", "+stack+");";
 289                 else
 290                         return var + ":= HEAD("+stack+"); "+stack+" := TAIL("+stack+");";
 291         }
 292 //Expression stack
 293
 294         private String createToEStack(int i) {
 295                 return createToEStack(i+"");
 296         }
 297
 298         private String createToEStack(String i) {
 299                 String res = createToStack("mjvm_estack", i);
 300                 if (genPrintEStackOnChange)
 301                         res += "PRINT(\"eStack\",mjvm_estack);";
 302                 return res;
 303         }
 304
 305         private String createFromEStack(String st) {
 306                 String res = createFromStack("mjvm_estack",st);
 307                 if (genPrintEStackOnChange)
 308                         res += "PRINT(\"eStack\",mjvm_estack);";
 309                 return res;
 310         }
 311
 312         private String createPopEStack() {
 313                 String res = "mjvm_estack := TAIL(mjvm_estack);";
 314                 if (genPrintEStackOnChange)
 315                         res += "PRINT(\"eStack\",mjvm_estack);";
 316                 return res;
 317         }
 318
 319         private String createTopTwoEStack() {
 320                 return createFromEStack("tempa") + "\n" + createFromEStack("tempb");
 321         }
 322
 323         private String createTopEStack() {
 324                 return createFromEStack("tempa");
 325         }
 326
 327         //Method stack
 328
 329         private String createToMStack(int i) {
 330                 return createToMStack(i+"");
 331         }
 332
 333         private String createToMStack(String i) {
 334                 return createToStack("mjvm_mstack", i);
 335         }
 336
 337         private String createFromMStack(String st) {
 338                 return createFromStack("mjvm_mstack", st);
 339         }
 340
 341         private String getRelationFor(int opcode) throws Exception {
 342                 switch (opcode) {
 343                                 case jeq: return "=";
 344                                 case jne: return "<>";
 345                                 case jlt: return "<";
 346                                 case jle: return "<=";
 347                                 case jgt: return ">";
 348                                 case jge: return ">=";
 349                 }
 350                 throw new Exception("Wrong opcode for a relation");
 351         }
 352
 353         private boolean isJumpCode(int opcode) {
 354                 return (opcode >= jmp) && (opcode <= jge);
 355         }
 356
 357         public void convertStream(InputStream ins) throws Exception{
 358                 mainIn = ins;
 359                 //process start
 360                 byte m = (byte) get();
 361                 byte j = (byte) get();
 362                 if (m!='M' || j !='J')
 363                                 throw new Exception("Wrong start of bytecode file");
 364                 int codesize = get4();
 365                 int numberOfWords = get4();
 366                 int mainAdr = get4();
 367
 368                 prl(createStandardStart(numberOfWords));
 369                 prl("SKIP;\n ACTIONS a" + (14 + mainAdr) + " :");
 370                 int op = get();
 371                 while (op >= 0) {
 372                         if (originalInComments)
 373                                 prl(createComment(describeOpCode(op), C_OC));
 374                         prl(" a" + counter + " == ");
 375                         if (genPrintForEachAddress) {
 376                                 prl("PRINT(\"a" + counter + "\");");
 377                                 if (genPauseAfterEachAddress)
 378                                         prl("debug_disposable_string := @Read_Line(Standard_Input_Port);");
 379                         }
 380                         switch (op) {
 381                         case load: {
 382                                 prl(createToEStack(createLocal(get())));
 383                                 break;
 384                         }
 385                         case load_0:
 386                         case load_1:
 387                         case load_2:
 388                         case load_3: {
 389                                 prl(createStartVar("tempa"));
 390                                 prl("tempa :="+createLocal(op - load_0)+";");
 391                                 prl(createToEStack("tempa"));
 392                                 prl(createEndVar());
 393                                 break;
 394                         }
 395                         case store: {
 396                                 prl(createFromEStack(createLocal(get())));
 397                                 break;
 398                         }
 399                         case store_0:
 400                         case store_1:
 401                         case store_2:
 402                         case store_3: {
 403                                 prl(createStartVar("tempa"));
 404                                 prl(createFromEStack("tempa"));
 405                                 prl(createLocal(op - store_0)+" := tempa;");
 406                                 prl(createEndVar());
 407                                 break;
 408                         }
 409
 410                         case getstatic: {
 411                                 prl(createToEStack(createStatic(get2())));
 412                                 break;
 413                         }
 414                         case putstatic: {
 415                                 prl(createFromEStack(createStatic(get2())));
 416                                 break;
 417                         }
 418
 419                         case getfield: {
 420                                 int f = get2();
 421                                 prl(createTopEStack());
 422                                 prl(createToEStack(createObject("tempa") + "[" + (f + 1) + "]"));
 423                                 break;
 424                         }
 425                         case putfield: {
 426                                 int f = get2();
 427                                 // we need to use a temparray as a pointer, WSL
 428                                 // otherwise tries to access it as a list of lists and fails
 429                                 prl(createTopTwoEStack());
 430                                 prl("VAR < tempArray := " + createObject("tempb") + " > :");
 431                                 prl("tempArray[" + (f + 1) + "]:=tempa ENDVAR;");
 432                                 break;
 433                         }
 434
 435                         case const_: {
 436                                 prl(createToEStack(get4()));
 437                                 break;
 438                         }
 439
 440                         case const_0:
 441                         case const_1:
 442                         case const_2:
 443                         case const_3:
 444                         case const_4:
 445                         case const_5: {
 446                                 prl(createToEStack(op - const_0));
 447                                 break;
 448                         }
 449
 450                         case add: {
 451                                 prl(createStartVar("tempa", "tempb", "tempres"));
 452                                 prl(createTopTwoEStack());
 453                                 prl("tempres := tempb + tempa;");
 454                                 prl(createToEStack("tempres"));
 455                                 prl(createEndVar());
 456                                 break;
 457                         }
 458                         case sub: {
 459                                 prl(createStartVar("tempa", "tempb", "tempres"));
 460                                 prl(createTopTwoEStack());
 461                                 prl("tempres := tempb - tempa;");
 462                                 prl(createToEStack("tempres"));
 463                                 prl(createEndVar());
 464                                 break;
 465                         }
 466                         case mul: {
 467                                 prl(createStartVar("tempa", "tempb", "tempres"));
 468                                 prl(createTopTwoEStack());
 469                                 prl("tempres := tempb * tempa;");
 470                                 prl(createToEStack("tempres"));
 471                                 prl(createEndVar());
 472                                 break;
 473                         }
 474                         case div: {
 475                                 prl(createStartVar("tempa", "tempb", "tempres"));
 476                                 prl(createTopTwoEStack());
 477                                 prl("IF tempa = 0 THEN ERROR(\"division by zero\") FI;");
 478                                 prl("tempres := tempb DIV tempa;");
 479                                 prl(createToEStack("tempres"));
 480                                 prl(createEndVar());
 481                                 break;
 482                         }
 483                         case rem: {
 484                                 prl(createStartVar("tempa", "tempb", "tempres"));
 485                                 prl(createTopTwoEStack());
 486                                 prl("IF tempa = 0 THEN ERROR(\"division by zero\") FI;");
 487                                 prl("tempres := tempb MOD tempa;");
 488                                 prl(createToEStack("tempres"));
 489                                 prl(createEndVar());
 490                                 break;
 491                         }
 492
 493                         case neg: {
 494                                 prl(createStartVar("tempa"));
 495                                 prl(createTopEStack());
 496                                 prl(createToEStack("-tempa"));
 497                                 prl(createEndVar());
 498                                 break;
 499                         }
 500
 501                         case shl: {
 502                                 prl(createTopTwoEStack());
 503                                 prl("VAR <tempres :=tempb, i:=1 >:");
 504                                 prl("\tFOR i:=1 TO tempa STEP 1 DO tempres := tempres * 2 OD;");
 505                                 prl(createToEStack("tempres"));
 506                                 prl("ENDVAR;");
 507                                 break;
 508                         }
 509                         case shr: {
 510                                 prl(createTopTwoEStack());
 511                                 prl("VAR <tempres :=tempb, i:=1 >:");
 512                                 prl("\tFOR i:=1 TO tempa STEP 1 DO tempres := tempres DIV 2 OD;");
 513                                 prl(createToEStack("tempres"));
 514                                 prl("ENDVAR;");
 515                                 break;
 516                         }
 517
 518                         case inc: {
 519                                 int b1 = get(), b2 = get();
 520                                 prl(createLocal(b1) + " := " + createLocal(b1) + " + " + b2 + ";");
 521                                 break;
 522                         }
 523
 524                         case new_: {
 525                                 int size = get2();
 526                                 // TODO maybe objects and arrays should be in the same list?
 527                                 prl("mjvm_objects := mjvm_objects ++ < ARRAY(" + size
 528                                                 + ",0) >;");
 529                                 prl(createToEStack("LENGTH(mjvm_objects)"));
 530                                 break;
 531                         }
 532                         case newarray: {
 533                                 get();// 0 - bytes, 1 - words; ignore for now
 534                                 // TODO take into consideration 0/1
 535                                 prl(createTopEStack());
 536                                 prl("mjvm_arrays := mjvm_arrays ++ < ARRAY(tempa,0) >;");
 537                                 prl(createToEStack("LENGTH(mjvm_arrays)"));
 538                                 break;
 539                         }
 540
 541                         case aload:
 542                         case baload: {
 543                                 prl(createTopTwoEStack());
 544                                 prl(createToEStack(createArray("tempb") + "[tempa+1]"));
 545                                 break;
 546                         }
 547                         case astore:
 548                         case bastore: {
 549                                 prl(createFromEStack("tempres"));
 550                                 prl(createTopTwoEStack());
 551                                 // we need to use a temparray as a pointer, WSL
 552                                 // otherwise tries to access it as a list of lists and fails
 553                                 prl("VAR < tempArray := " + createArray("tempb") + " > :");
 554                                 prl("tempArray[tempa+1]:=tempres ENDVAR;");
 555                                 break;
 556                         }
 557                         case arraylength: {
 558                                 prl(createTopEStack());
 559                                 prl("tempb := LENGTH("+ createArray("tempa") + ");");
 560                                 prl(createToEStack("tempb"));
 561                                 break;
 562                         }
 563
 564                         case dup: {
 565                                 prl(createTopEStack());
 566                                 prl(createToEStack("tempa"));
 567                                 prl(createToEStack("tempa"));
 568                                 break;
 569                         }
 570                         case dup2: {
 571                                 prl(createTopTwoEStack());
 572                                 prl(createToEStack("tempb"));
 573                                 prl(createToEStack("tempa"));
 574                                 prl(createToEStack("tempb"));
 575                                 prl(createToEStack("tempa"));
 576                                 break;
 577                         }
 578
 579                         case pop: {
 580                                 prl(createPopEStack());
 581                                 break;
 582                         }
 583
 584                         case jmp: {
 585                                 prl("CALL a" + (counter + get2()) + ";");
 586                                 break;
 587                         }
 588
 589                         case jeq:
 590                         case jne:
 591                         case jlt:
 592                         case jle:
 593                         case jgt:
 594                         case jge: {
 595                                 prl(createStartVar("tempa", "tempb"));
 596                                 prl(createTopTwoEStack());
 597                                 prl("IF tempb " + getRelationFor(op) + " tempa THEN CALL a"
 598                                                 + (counter + get2()) + " ELSE CALL a" + (counter + 1)
 599                                                 + " FI;");
 600                                 prl(createEndVar());
 601
 602                                 break;
 603                         }
 604
 605                         case call: {
 606                                 prl("CALL a" + (counter + get2()) + ";");
 607                                 break;
 608                         }
 609
 610                         case return_: {
 611                                 // we let the actions return
 612                                 // there is nothing to clean up
 613                                 prl("SKIP\n END\n b" + counter + " ==");
 614                                 break;
 615                         }
 616                         case enter: {
 617                                 int parameters = get();
 618
 619                                 int locals = get();
 620                                 prl(createToMStack("mjvm_locals"));
 621                                 prl("mjvm_locals := ARRAY(" + locals + ",0);");
 622                                 for (int i = parameters - 1; i >= 0; i--)
 623                                         prl(createFromEStack(createLocal(i)));
 624                                 break;
 625                         }
 626                         case exit: {
 627                                 prl(createFromMStack("mjvm_locals"));
 628                                 break;
 629                         }
 630
 631                         // read, print
 632                         case bread: {
 633                                 // TODO make it a char for read
 634                                 messages.message("char is read like a number", TransMessages.M_WAR);
 635                                 prl(createComment("char is read like a number", C_SPEC));
 636                         }
 637                         case read: {
 638                                 prl(createStartVar("tempa"));
 639                                 prl("tempa := @String_To_Num(@Read_Line(Standard_Input_Port));");
 640                                 prl(createToEStack("tempa"));
 641                                 prl(createEndVar());
 642                                 break;
 643                         }
 644
 645                         // the prints
 646                         case bprint: {
 647                                 // TODO need to make it a char on print
 648                                 messages.message("chars will be printed as number codes", TransMessages.M_WAR);
 649                                 prl(createComment("char will be printed as a number code",
 650                                                 C_SPEC));
 651                         }
 652                         case print: {
 653                                 // TODO printing numbers needs different lengths of spacing
 654                                 prl(createStartVar("tempa", "tempb"));
 655
 656                                 prl(createTopTwoEStack());
 657                                 prl("Print_MJ(tempb,tempa);");
 658                                 prl(createEndVar());
 659                                 break;
 660                         }
 661
 662                         case trap: {
 663                                 prl("ERROR(\"Runtime error: trap(" + get() + ")\");");
 664                                 break;
 665                         }
 666
 667                         default:
 668                                 prl(createComment("unknown op error: " + op, C_ERR));
 669                                 messages.message("unknown op error: " + op, TransMessages.M_ERR);
 670                                 break;
 671                         }
 672
 673                         boolean wasJump = isJumpCode(op);
 674                         op = get();
 675                         if (op >= 0)
 676                                 if (wasJump)
 677                                         prl("SKIP\n END");
 678                                 else
 679                                         prl("CALL a" + counter + "\n END");
 680                 }
 681                 prl("SKIP\n END\nENDACTIONS;\n");
 682                 prl(createStandardEnd());
 683         }
 684
 685         public void convertFile(File f) {
 686                 try {
 687                         convertStream(new FileInputStream(f));
 688                 } catch (Exception ex) {
 689                         ex.printStackTrace();
 690                 }
 691         }
 692
 693         public void printHelp() {
 694                 printVersion();
 695                 printUsage();
 696                 printHelpOutput();
 697                 printHelpHelp();
 698         }
 699
 700         public void printLongHelp() {
 701                 printVersion();
 702                 printUsage();
 703                 System.out.println();
 704                 printHelpOutput();
 705                 System.out.println();
 706                 printHelpDirectives();
 707                 System.out.println();
 708                 printHelpGenerating();
 709                 System.out.println();
 710                 printHelpHelp();
 711         }
 712
 713         public void printHelpOutput() {
 714                 System.out.println("Output options:");
 715                 System.out.println("  --screen print output to screen");
 716                 System.out.println("  -o --oc[+-] include original code in comments");
 717                 System.out.println("  -v verbose, print warning messages");
 718                 System.out.println("  -q quiet; don't print even the error messages");
 719                 System.out.println("  -d print detailed debug messages");
 720         }
 721
 722         public void printHelpGenerating() {
 723                 System.out.println("Options for generating extra code for tracking code execution");
 724                 System.out.println("  --genEStackPrint generate print for all EStack changes");
 725                 System.out.println("  --genAddrPrint  generate prints after every address of the original code ");
 726                 System.out.println("  --genAddrPause  generate a pause after every address of the original code ");
 727                 System.out.println("  --genAddr  short for --genAddrPrint and --genAddrPause");
 728                 System.out.println("  --genAll   short for applying all code generation");
 729         }
 730
 731         public void printHelpDirectives(){
 732                 System.out.println("Alternatives for code generation:");
 733                 System.out.println("  --genPopPush generate POP/PUSH instead of TAIL/HEAD");
 734         }
 735
 736         public void printHelpHelp() {
 737                 System.out.println("Help and info options");
 738                 System.out.println("  -h basic help");
 739                 System.out.println("  --help print more detailed help");
 740                 System.out.println("  --version or -version print version and exit");
 741         }
 742
 743         public void printUsage(){
 744                 System.out.println("usage:\n\t mjc2wsl {options} filename [outfile]");
 745         }
 746
 747         public void printVersion() {
 748                 System.out.println("MicroJava bytecode to WSL converter. v " + versionN
 749                                 + ", by Doni Pracner");
 750         }
 751
 752         public String makeDefaultOutName(String inname){
 753                 String rez = inname;
 754                 if (inname.endsWith(".obj"))
 755                         rez = rez.substring(0, rez.length() - 4);
 756                 return rez + ".wsl";
 757         }
 758
 759         public void run(String[] args) {
 760                 if (args.length == 0) {
 761                         printHelp();
 762                 } else {
 763                         int i = 0;
 764                         while (i < args.length && args[i].charAt(0) == '-') {
 765                                 if (args[i].compareTo("-h") == 0) {
 766                                         printHelp();
 767                                         return;
 768                                 } else if (args[i].compareTo("--help") == 0) {
 769                                         printLongHelp();
 770                                         return;
 771                                 } else if (args[i].compareTo("--version") == 0
 772                                                 || args[i].compareTo("-version") == 0) {
 773                                         printVersion();
 774                                         return;
 775                                 } else if (args[i].compareTo("-o") == 0
 776                                                 || args[i].startsWith("--oc")) {
 777                                         if (args[i].length() == 2)
 778                                                 originalInComments = true;
 779                                         else if (args[i].length() == 5)
 780                                                 originalInComments = args[i].charAt(4) == '+';
 781                                         else
 782                                                 originalInComments = true;
 783                                 } else if (args[i].compareTo("--screen") == 0) {
 784                                         out = new PrintWriter(System.out);
 785                                 } else if (args[i].compareTo("-d") == 0) {
 786                                         messages.setPrintLevel(TransMessages.M_DEB);// print debug info
 787                                 } else if (args[i].compareTo("-v") == 0) {
 788                                         messages.setPrintLevel(TransMessages.M_WAR);// print warnings
 789                                 } else if (args[i].compareTo("-q") == 0) {
 790                                         messages.setPrintLevel(TransMessages.M_QUIET);// no printing
 791                                 } else if (args[i].compareToIgnoreCase("--genEStackPrint") == 0) {
 792                                         genPrintEStackOnChange = true;
 793                                 } else if (args[i].compareToIgnoreCase("--genAddrPause") == 0) {
 794                                         genPauseAfterEachAddress = true;
 795                                 } else if (args[i].compareToIgnoreCase("--genAddrPrint") == 0) {
 796                                         genPrintForEachAddress = true;
 797                                 } else if (args[i].compareToIgnoreCase("--genAddr") == 0) {
 798                                         genPrintForEachAddress = true;
 799                                         genPauseAfterEachAddress = true;
 800                                 } else if (args[i].compareToIgnoreCase("--genAll") == 0) {
 801                                         genPrintEStackOnChange = true;
 802                                         genPrintForEachAddress = true;
 803                                         genPauseAfterEachAddress = true;
 804                                 } else if (args[i].compareToIgnoreCase("--genPopPush") == 0) {
 805                                         genPopPush = true;
 806                                 }
 807                                 i++;
 808                         }
 809
 810                         if (i >= args.length) {
 811                                 System.out.println("no filename supplied");
 812                                 System.exit(2);
 813                         }
 814                         File f = new File(args[i]);
 815
 816                         if (i + 1 < args.length) {
 817                                 try {
 818                                         out = new PrintWriter(args[i + 1]);
 819                                 } catch (Exception e) {
 820                                         System.err.println("error in opening out file:");
 821                                         e.printStackTrace();
 822                                 }
 823                         }
 824                         if (out == null) {
 825                                 // if not set to screen, or a file, make a default filename
 826                                 try {
 827                                         out = new PrintWriter(makeDefaultOutName(args[i]));
 828                                 } catch (Exception e) {
 829                                         System.err.println("error in opening out file:");
 830                                         e.printStackTrace();
 831                                 }
 832                         }
 833                         if (f.exists()) {
 834                                 Calendar now = Calendar.getInstance();
 835                                 convertFile(f);
 836                                 long mili = Calendar.getInstance().getTimeInMillis()
 837                                                 - now.getTimeInMillis();
 838                                 System.out.println("conversion time:" + mili + " ms");
 839                                 messages.printMessageCounters();
 840                                 out.close();
 841                         } else
 842                                 System.out.println("file does not exist");
 843                 }
 844         }
 845
 846         public static void main(String[] args) {
 847                 new mjc2wsl().run(args);
 848         }
 849 }