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858cae30017462a3e99346d55bb7e958db7230f6
2 Copyright (C) 2014 Doni Pracner
4 This file is part of mjc2wsl.
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.
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.
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/>.
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
28 * @author Doni Pracner, http://perun.dmi.rs/pracner http://quemaster.com
31 public static String versionN
= "0.1.5";
33 private TransMessages messages
= new TransMessages();
35 private boolean genPauseAfterEachAddress
=false,
36 genPrintForEachAddress
= false,
37 genPrintEStackOnChange
= false;
39 /** Constant used for marking a regular comment from the original file */
40 public static final char C_REG
= ' ';
42 * Constant used for marking when original code is inserted in the file,
43 * next to the translations
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
= '!';
51 /** instruction code in MicroJava bytecode. */
52 public static final int
111 private boolean originalInComments
= false;
113 private HashMap
<Integer
,String
> opMap
= null;
115 private String opCodeFile
= "mj-bytecodes.properties";
117 private HashMap
<Integer
, String
> getOpMap() {
119 opMap
= new HashMap
<Integer
, String
>(60, 0.98f
);
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]);
130 } catch (Exception ex
) {
131 ex
.printStackTrace();
137 public String
getOpString(int op
) {
138 return getOpMap().get(op
);
141 public String
describeOpCode(int op
) {
142 return op
+ " (" + getOpString(op
) + ")";
145 private InputStream mainIn
;
146 private PrintWriter out
= null;
147 private int counter
= -1;
149 private void pr(int i
){
153 private void pr(char i
){
157 private void pr(String i
){
161 private void prl(String i
){
170 res
= res
<< 24 >>> 24;
171 } catch (IOException ex
) {
172 ex
.printStackTrace();
179 return (get() * 256 + get()) << 16 >> 16;
183 return (get2() << 16) + (get2() << 16 >>> 16);
186 public String
createStandardStart(){
187 return createStandardStart(10);
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");
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 := < > > : ");
203 return ret
.toString();
206 public String
createStandardEnd(){
207 StringBuilder ret
= new StringBuilder("SKIP\nENDVAR");
208 ret
.append("\nWHERE\n");
210 ret
.append("\nPROC Print_MJ(val, format VAR)==\n");
211 ret
.append(createComment("print spacing", C_SPEC
));
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");
217 ret
.append("\nEND\n");
219 return ret
.toString();
222 private String
createLocal(int i
) {
223 // arrays start at 1 in WSL, so we need an offset
224 return "mjvm_locals[" + (i
+ 1) + "]";
227 private String
createStatic(int i
) {
228 return "mjvm_statics[" + (i
+ 1) + "]";
231 private String
createArray(int i
) {
232 return "mjvm_arrays[" + i
+ "]";
235 private String
createArray(String i
) {
236 return "mjvm_arrays[" + i
+ "]";
239 private String
createObject(String i
) {
240 return "mjvm_objects[" + i
+ "]";
244 * Creates a WSL comment with care to quote chars.
246 public static String
createComment(String str
){
247 return createComment(str
, C_REG
);
251 * Creates a WSL comment with care to quote chars, of the
252 * given type. Types are given as char constants. They can be
253 * default comments, comments that contain the original code
254 * in them, or additional comments regarding the translation
257 public static String
createComment(String str
, char type
) {
258 return "C:\"" + type
+ str
.replace("\"", "''") + "\";";
263 private String
createToEStack(int i
) {
264 String res
= "mjvm_estack := <" + i
+ " > ++ mjvm_estack;";
265 if (genPrintEStackOnChange
)
266 res
+= "PRINT(\"eStack\",mjvm_estack);";
270 private String
createToEStack(String i
) {
271 String res
= "mjvm_estack := <" + i
+ " > ++ mjvm_estack;";
272 if (genPrintEStackOnChange
)
273 res
+= "PRINT(\"eStack\",mjvm_estack);";
277 private String
createFromEStack(String st
) {
279 + " := HEAD(mjvm_estack); mjvm_estack := TAIL(mjvm_estack);";
280 if (genPrintEStackOnChange
)
281 res
+= "PRINT(\"eStack\",mjvm_estack);";
285 private String
createPopEStack() {
286 String res
= "mjvm_estack := TAIL(mjvm_estack);";
287 if (genPrintEStackOnChange
)
288 res
+= "PRINT(\"eStack\",mjvm_estack);";
292 private String
createTopTwoEStack() {
293 return createFromEStack("tempa") + "\n" + createFromEStack("tempb");
296 private String
createTopEStack() {
297 return createFromEStack("tempa");
302 private String
createToMStack(int i
) {
303 return "mjvm_mstack := <" + i
+ " > ++ mjvm_mstack;";
306 private String
createToMStack(String i
) {
307 return "mjvm_mstack := <" + i
+ " > ++ mjvm_mstack;";
310 private String
createFromMStack(String st
) {
311 return st
+ " := HEAD(mjvm_mstack); mjvm_mstack := TAIL(mjvm_mstack);";
314 private String
getRelationFor(int opcode
) throws Exception
{
316 case jeq
: return "=";
317 case jne
: return "<>";
318 case jlt
: return "<";
319 case jle
: return "<=";
320 case jgt
: return ">";
321 case jge
: return ">=";
323 throw new Exception("Wrong opcode for a relation");
326 private boolean isJumpCode(int opcode
) {
327 return (opcode
>= jmp
) && (opcode
<= jge
);
330 public void convertStream(InputStream ins
) throws Exception
{
333 byte m
= (byte) get();
334 byte j
= (byte) get();
335 if (m
!='M' || j
!='J')
336 throw new Exception("Wrong start of bytecode file");
337 int codesize
= get4();
338 int numberOfWords
= get4();
339 int mainAdr
= get4();
341 prl(createStandardStart(numberOfWords
));
342 prl("SKIP;\n ACTIONS a" + (14 + mainAdr
) + " :");
345 if (originalInComments
)
346 prl(createComment(describeOpCode(op
), C_OC
));
347 prl(" a" + counter
+ " == ");
348 if (genPrintForEachAddress
) {
349 prl("PRINT(\"a" + counter
+ "\");");
350 if (genPauseAfterEachAddress
)
351 prl("debug_disposable_string := @Read_Line(Standard_Input_Port);");
355 prl(createToEStack(createLocal(get())));
362 prl(createToEStack(createLocal(op
- load_0
)));
366 prl(createFromEStack(createLocal(get())));
373 prl(createFromEStack(createLocal(op
- store_0
)));
378 prl(createToEStack(createStatic(get2())));
382 prl(createFromEStack(createStatic(get2())));
388 prl(createTopEStack());
389 prl(createToEStack(createObject("tempa") + "[" + (f
+ 1) + "]"));
394 // we need to use a temparray as a pointer, WSL
395 // otherwise tries to access it as a list of lists and fails
396 prl(createTopTwoEStack());
397 prl("VAR < tempArray := " + createObject("tempb") + " > :");
398 prl("tempArray[" + (f
+ 1) + "]:=tempa ENDVAR;");
403 prl(createToEStack(get4()));
413 prl(createToEStack(op
- const_0
));
418 prl(createTopTwoEStack());
419 prl("tempres := tempb + tempa;");
420 prl(createToEStack("tempres"));
424 prl(createTopTwoEStack());
425 prl("tempres := tempb - tempa;");
426 prl(createToEStack("tempres"));
430 prl(createTopTwoEStack());
431 prl("tempres := tempb * tempa;");
432 prl(createToEStack("tempres"));
436 prl(createTopTwoEStack());
437 prl("IF tempa = 0 THEN ERROR(\"division by zero\") FI;");
438 prl("tempres := tempb DIV tempa;");
439 prl(createToEStack("tempres"));
443 prl(createTopTwoEStack());
444 prl("IF tempa = 0 THEN ERROR(\"division by zero\") FI;");
445 prl("tempres := tempb MOD tempa;");
446 prl(createToEStack("tempres"));
451 prl(createTopEStack());
452 prl(createToEStack("-tempa"));
457 prl(createTopTwoEStack());
458 prl("VAR <tempres :=tempb, i:=1 >:");
459 prl("\tFOR i:=1 TO tempa STEP 1 DO tempres := tempres * 2 OD;");
460 prl(createToEStack("tempres"));
465 prl(createTopTwoEStack());
466 prl("VAR <tempres :=tempb, i:=1 >:");
467 prl("\tFOR i:=1 TO tempa STEP 1 DO tempres := tempres DIV 2 OD;");
468 prl(createToEStack("tempres"));
474 int b1
= get(), b2
= get();
475 prl(createLocal(b1
) + " := " + createLocal(b1
) + " + " + b2
+ ";");
481 // TODO maybe objects and arrays should be in the same list?
482 prl("mjvm_objects := mjvm_objects ++ < ARRAY(" + size
484 prl(createToEStack("LENGTH(mjvm_objects)"));
488 get();// 0 - bytes, 1 - words; ignore for now
489 // TODO take into consideration 0/1
490 prl(createTopEStack());
491 prl("mjvm_arrays := mjvm_arrays ++ < ARRAY(tempa,0) >;");
492 prl(createToEStack("LENGTH(mjvm_arrays)"));
498 prl(createTopTwoEStack());
499 prl(createToEStack(createArray("tempb") + "[tempa+1]"));
504 prl(createFromEStack("tempres"));
505 prl(createTopTwoEStack());
506 // we need to use a temparray as a pointer, WSL
507 // otherwise tries to access it as a list of lists and fails
508 prl("VAR < tempArray := " + createArray("tempb") + " > :");
509 prl("tempArray[tempa+1]:=tempres ENDVAR;");
513 prl(createTopEStack());
514 prl("tempb := LENGTH("+ createArray("tempa") + ");");
515 prl(createToEStack("tempb"));
520 prl(createTopEStack());
521 prl(createToEStack("tempa"));
522 prl(createToEStack("tempa"));
526 prl(createTopTwoEStack());
527 prl(createToEStack("tempb"));
528 prl(createToEStack("tempa"));
529 prl(createToEStack("tempb"));
530 prl(createToEStack("tempa"));
535 prl(createPopEStack());
540 prl("CALL a" + (counter
+ get2()) + ";");
550 prl(createTopTwoEStack());
551 prl("IF tempb " + getRelationFor(op
) + " tempa THEN CALL a"
552 + (counter
+ get2()) + " ELSE CALL a" + (counter
+ 1)
558 prl("CALL a" + (counter
+ get2()) + ";");
563 // we let the actions return
564 // there is nothing to clean up
565 prl("SKIP\n END\n b" + counter
+ " ==");
569 int parameters
= get();
572 prl(createToMStack("mjvm_locals"));
573 prl("mjvm_locals := ARRAY(" + locals
+ ",0);");
574 for (int i
= parameters
- 1; i
>= 0; i
--)
575 prl(createFromEStack(createLocal(i
)));
579 prl(createFromMStack("mjvm_locals"));
585 // TODO make it a char for read
586 messages
.message("char is read like a number", TransMessages
.M_WAR
);
587 prl(createComment("char is read like a number", C_SPEC
));
590 prl("tempa := @String_To_Num(@Read_Line(Standard_Input_Port));");
591 prl(createToEStack("tempa"));
597 // TODO need to make it a char on print
598 messages
.message("chars will be printed as number codes", TransMessages
.M_WAR
);
599 prl(createComment("char will be printed as a number code",
603 // TODO printing numbers needs different lengths of spacing
604 prl(createTopTwoEStack());
605 prl("Print_MJ(tempb,tempa);");
610 prl("ERROR(\"Runtime error: trap(" + get() + ")\");");
615 prl(createComment("unknown op error: " + op
, C_ERR
));
616 messages
.message("unknown op error: " + op
, TransMessages
.M_ERR
);
620 boolean wasJump
= isJumpCode(op
);
626 prl("CALL a" + counter
+ "\n END");
628 prl("SKIP\n END\nENDACTIONS;\n");
629 prl(createStandardEnd());
632 public void convertFile(File f
) {
634 convertStream(new FileInputStream(f
));
635 } catch (Exception ex
) {
636 ex
.printStackTrace();
640 public void printHelp() {
647 public void printLongHelp() {
650 System
.out
.println();
652 System
.out
.println();
653 printHelpGenerating();
654 System
.out
.println();
658 public void printHelpOutput() {
659 System
.out
.println("Output options:");
660 System
.out
.println(" --screen print output to screen");
661 System
.out
.println(" -o --oc[+-] include original code in comments");
662 System
.out
.println(" -v verbose, print warning messages");
663 System
.out
.println(" -q quiet; don't print even the error messages");
664 System
.out
.println(" -d print detailed debug messages");
667 public void printHelpGenerating() {
668 System
.out
.println("Options for generating extra code for tracking code execution");
669 System
.out
.println(" --genEStackPrint generate print for all EStack changes");
670 System
.out
.println(" --genAddrPrint generate prints after every address of the original code ");
671 System
.out
.println(" --genAddrPause generate a pause after every address of the original code ");
672 System
.out
.println(" --genAddr short for --genAddrPrint and --genAddrPause");
673 System
.out
.println(" --genAll short for applying all code generation");
676 public void printHelpHelp() {
677 System
.out
.println("Help and info options");
678 System
.out
.println(" -h basic help");
679 System
.out
.println(" --help print more detailed help");
680 System
.out
.println(" --version or -version print version and exit");
683 public void printUsage(){
684 System
.out
.println("usage:\n\t mjc2wsl {options} filename [outfile]");
687 public void printVersion() {
688 System
.out
.println("MicroJava bytecode to WSL converter. v " + versionN
689 + ", by Doni Pracner");
692 public String
makeDefaultOutName(String inname
){
694 if (inname
.endsWith(".obj"))
695 rez
= rez
.substring(0, rez
.length() - 4);
699 public void run(String
[] args
) {
700 if (args
.length
== 0) {
704 while (i
< args
.length
&& args
[i
].charAt(0) == '-') {
705 if (args
[i
].compareTo("-h") == 0) {
708 } else if (args
[i
].compareTo("--help") == 0) {
711 } else if (args
[i
].compareTo("--version") == 0
712 || args
[i
].compareTo("-version") == 0) {
715 } else if (args
[i
].compareTo("-o") == 0
716 || args
[i
].startsWith("--oc")) {
717 if (args
[i
].length() == 2)
718 originalInComments
= true;
719 else if (args
[i
].length() == 5)
720 originalInComments
= args
[i
].charAt(4) == '+';
722 originalInComments
= true;
723 } else if (args
[i
].compareTo("--screen") == 0) {
724 out
= new PrintWriter(System
.out
);
725 } else if (args
[i
].compareTo("-d") == 0) {
726 messages
.setPrintLevel(TransMessages
.M_DEB
);// print debug info
727 } else if (args
[i
].compareTo("-v") == 0) {
728 messages
.setPrintLevel(TransMessages
.M_WAR
);// print warnings
729 } else if (args
[i
].compareTo("-q") == 0) {
730 messages
.setPrintLevel(TransMessages
.M_QUIET
);// no printing
731 } else if (args
[i
].compareToIgnoreCase("--genEStackPrint") == 0) {
732 genPrintEStackOnChange
= true;
733 } else if (args
[i
].compareToIgnoreCase("--genAddrPause") == 0) {
734 genPauseAfterEachAddress
= true;
735 } else if (args
[i
].compareToIgnoreCase("--genAddrPrint") == 0) {
736 genPrintForEachAddress
= true;
737 } else if (args
[i
].compareToIgnoreCase("--genAddr") == 0) {
738 genPrintForEachAddress
= true;
739 genPauseAfterEachAddress
= true;
740 } else if (args
[i
].compareToIgnoreCase("--genAll") == 0) {
741 genPrintEStackOnChange
= true;
742 genPrintForEachAddress
= true;
743 genPauseAfterEachAddress
= true;
748 if (i
>= args
.length
) {
749 System
.out
.println("no filename supplied");
752 File f
= new File(args
[i
]);
754 if (i
+ 1 < args
.length
) {
756 out
= new PrintWriter(args
[i
+ 1]);
757 } catch (Exception e
) {
758 System
.err
.println("error in opening out file:");
763 // if not set to screen, or a file, make a default filename
765 out
= new PrintWriter(makeDefaultOutName(args
[i
]));
766 } catch (Exception e
) {
767 System
.err
.println("error in opening out file:");
772 Calendar now
= Calendar
.getInstance();
774 long mili
= Calendar
.getInstance().getTimeInMillis()
775 - now
.getTimeInMillis();
776 System
.out
.println("conversion time:" + mili
+ " ms");
777 messages
.printMessageCounters();
780 System
.out
.println("file does not exist");
784 public static void main(String
[] args
) {
785 new mjc2wsl().run(args
);
Svarog.pmf.uns.ac.rs/gitweb
maintanance
Doni Pracner