gitweb on Svarog
projekti pod git sistemom za održavanje verzija -- projects under
the git version control system
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
= "0.1.6";
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 < \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
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");
229 return ret
.toString();
232 private String
createEndVar(){
236 private String
createLocal(int i
) {
237 // arrays start at 1 in WSL, so we need an offset
238 return "mjvm_locals[" + (i
+ 1) + "]";
241 private String
createStatic(int i
) {
242 return "mjvm_statics[" + (i
+ 1) + "]";
245 private String
createArray(int i
) {
246 return "mjvm_arrays[" + i
+ "]";
249 private String
createArray(String i
) {
250 return "mjvm_arrays[" + i
+ "]";
253 private String
createObject(String i
) {
254 return "mjvm_objects[" + i
+ "]";
258 * Creates a WSL comment with care to quote chars.
260 public static String
createComment(String str
){
261 return createComment(str
, C_REG
);
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
271 public static String
createComment(String str
, char type
) {
272 return "C:\"" + type
+ str
.replace("\"", "''") + "\";";
277 private String
createToEStack(int i
) {
278 String res
= "mjvm_estack := <" + i
+ " > ++ mjvm_estack;";
279 if (genPrintEStackOnChange
)
280 res
+= "PRINT(\"eStack\",mjvm_estack);";
284 private String
createToEStack(String i
) {
285 String res
= "mjvm_estack := <" + i
+ " > ++ mjvm_estack;";
286 if (genPrintEStackOnChange
)
287 res
+= "PRINT(\"eStack\",mjvm_estack);";
291 private String
createFromEStack(String st
) {
293 + " := HEAD(mjvm_estack); mjvm_estack := TAIL(mjvm_estack);";
294 if (genPrintEStackOnChange
)
295 res
+= "PRINT(\"eStack\",mjvm_estack);";
299 private String
createPopEStack() {
300 String res
= "mjvm_estack := TAIL(mjvm_estack);";
301 if (genPrintEStackOnChange
)
302 res
+= "PRINT(\"eStack\",mjvm_estack);";
306 private String
createTopTwoEStack() {
307 return createFromEStack("tempa") + "\n" + createFromEStack("tempb");
310 private String
createTopEStack() {
311 return createFromEStack("tempa");
316 private String
createToMStack(int i
) {
317 return "mjvm_mstack := <" + i
+ " > ++ mjvm_mstack;";
320 private String
createToMStack(String i
) {
321 return "mjvm_mstack := <" + i
+ " > ++ mjvm_mstack;";
324 private String
createFromMStack(String st
) {
325 return st
+ " := HEAD(mjvm_mstack); mjvm_mstack := TAIL(mjvm_mstack);";
328 private String
getRelationFor(int opcode
) throws Exception
{
330 case jeq
: return "=";
331 case jne
: return "<>";
332 case jlt
: return "<";
333 case jle
: return "<=";
334 case jgt
: return ">";
335 case jge
: return ">=";
337 throw new Exception("Wrong opcode for a relation");
340 private boolean isJumpCode(int opcode
) {
341 return (opcode
>= jmp
) && (opcode
<= jge
);
344 public void convertStream(InputStream ins
) throws Exception
{
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();
355 prl(createStandardStart(numberOfWords
));
356 prl("SKIP;\n ACTIONS a" + (14 + mainAdr
) + " :");
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);");
369 prl(createToEStack(createLocal(get())));
376 prl(createToEStack(createLocal(op
- load_0
)));
380 prl(createFromEStack(createLocal(get())));
387 prl(createFromEStack(createLocal(op
- store_0
)));
392 prl(createToEStack(createStatic(get2())));
396 prl(createFromEStack(createStatic(get2())));
402 prl(createTopEStack());
403 prl(createToEStack(createObject("tempa") + "[" + (f
+ 1) + "]"));
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;");
417 prl(createToEStack(get4()));
427 prl(createToEStack(op
- const_0
));
432 prl(createStartVar("tempa", "tempb", "tempres"));
433 prl(createTopTwoEStack());
434 prl("tempres := tempb + tempa;");
435 prl(createToEStack("tempres"));
440 prl(createStartVar("tempa", "tempb", "tempres"));
441 prl(createTopTwoEStack());
442 prl("tempres := tempb - tempa;");
443 prl(createToEStack("tempres"));
448 prl(createStartVar("tempa", "tempb", "tempres"));
449 prl(createTopTwoEStack());
450 prl("tempres := tempb * tempa;");
451 prl(createToEStack("tempres"));
456 prl(createStartVar("tempa", "tempb", "tempres"));
457 prl(createTopTwoEStack());
458 prl("IF tempa = 0 THEN ERROR(\"division by zero\") FI;");
459 prl("tempres := tempb DIV tempa;");
460 prl(createToEStack("tempres"));
465 prl(createStartVar("tempa", "tempb", "tempres"));
466 prl(createTopTwoEStack());
467 prl("IF tempa = 0 THEN ERROR(\"division by zero\") FI;");
468 prl("tempres := tempb MOD tempa;");
469 prl(createToEStack("tempres"));
475 prl(createStartVar("tempa"));
476 prl(createTopEStack());
477 prl(createToEStack("-tempa"));
483 prl(createTopTwoEStack());
484 prl("VAR <tempres :=tempb, i:=1 >:");
485 prl("\tFOR i:=1 TO tempa STEP 1 DO tempres := tempres * 2 OD;");
486 prl(createToEStack("tempres"));
491 prl(createTopTwoEStack());
492 prl("VAR <tempres :=tempb, i:=1 >:");
493 prl("\tFOR i:=1 TO tempa STEP 1 DO tempres := tempres DIV 2 OD;");
494 prl(createToEStack("tempres"));
500 int b1
= get(), b2
= get();
501 prl(createLocal(b1
) + " := " + createLocal(b1
) + " + " + b2
+ ";");
507 // TODO maybe objects and arrays should be in the same list?
508 prl("mjvm_objects := mjvm_objects ++ < ARRAY(" + size
510 prl(createToEStack("LENGTH(mjvm_objects)"));
514 get();// 0 - bytes, 1 - words; ignore for now
515 // TODO take into consideration 0/1
516 prl(createTopEStack());
517 prl("mjvm_arrays := mjvm_arrays ++ < ARRAY(tempa,0) >;");
518 prl(createToEStack("LENGTH(mjvm_arrays)"));
524 prl(createTopTwoEStack());
525 prl(createToEStack(createArray("tempb") + "[tempa+1]"));
530 prl(createFromEStack("tempres"));
531 prl(createTopTwoEStack());
532 // we need to use a temparray as a pointer, WSL
533 // otherwise tries to access it as a list of lists and fails
534 prl("VAR < tempArray := " + createArray("tempb") + " > :");
535 prl("tempArray[tempa+1]:=tempres ENDVAR;");
539 prl(createTopEStack());
540 prl("tempb := LENGTH("+ createArray("tempa") + ");");
541 prl(createToEStack("tempb"));
546 prl(createTopEStack());
547 prl(createToEStack("tempa"));
548 prl(createToEStack("tempa"));
552 prl(createTopTwoEStack());
553 prl(createToEStack("tempb"));
554 prl(createToEStack("tempa"));
555 prl(createToEStack("tempb"));
556 prl(createToEStack("tempa"));
561 prl(createPopEStack());
566 prl("CALL a" + (counter
+ get2()) + ";");
576 prl(createStartVar("tempa", "tempb"));
577 prl(createTopTwoEStack());
578 prl("IF tempb " + getRelationFor(op
) + " tempa THEN CALL a"
579 + (counter
+ get2()) + " ELSE CALL a" + (counter
+ 1)
587 prl("CALL a" + (counter
+ get2()) + ";");
592 // we let the actions return
593 // there is nothing to clean up
594 prl("SKIP\n END\n b" + counter
+ " ==");
598 int parameters
= get();
601 prl(createToMStack("mjvm_locals"));
602 prl("mjvm_locals := ARRAY(" + locals
+ ",0);");
603 for (int i
= parameters
- 1; i
>= 0; i
--)
604 prl(createFromEStack(createLocal(i
)));
608 prl(createFromMStack("mjvm_locals"));
614 // TODO make it a char for read
615 messages
.message("char is read like a number", TransMessages
.M_WAR
);
616 prl(createComment("char is read like a number", C_SPEC
));
619 prl(createStartVar("tempa"));
620 prl("tempa := @String_To_Num(@Read_Line(Standard_Input_Port));");
621 prl(createToEStack("tempa"));
628 // TODO need to make it a char on print
629 messages
.message("chars will be printed as number codes", TransMessages
.M_WAR
);
630 prl(createComment("char will be printed as a number code",
634 // TODO printing numbers needs different lengths of spacing
635 prl(createStartVar("tempa", "tempb"));
637 prl(createTopTwoEStack());
638 prl("Print_MJ(tempb,tempa);");
644 prl("ERROR(\"Runtime error: trap(" + get() + ")\");");
649 prl(createComment("unknown op error: " + op
, C_ERR
));
650 messages
.message("unknown op error: " + op
, TransMessages
.M_ERR
);
654 boolean wasJump
= isJumpCode(op
);
660 prl("CALL a" + counter
+ "\n END");
662 prl("SKIP\n END\nENDACTIONS;\n");
663 prl(createStandardEnd());
666 public void convertFile(File f
) {
668 convertStream(new FileInputStream(f
));
669 } catch (Exception ex
) {
670 ex
.printStackTrace();
674 public void printHelp() {
681 public void printLongHelp() {
684 System
.out
.println();
686 System
.out
.println();
687 printHelpGenerating();
688 System
.out
.println();
692 public void printHelpOutput() {
693 System
.out
.println("Output options:");
694 System
.out
.println(" --screen print output to screen");
695 System
.out
.println(" -o --oc[+-] include original code in comments");
696 System
.out
.println(" -v verbose, print warning messages");
697 System
.out
.println(" -q quiet; don't print even the error messages");
698 System
.out
.println(" -d print detailed debug messages");
701 public void printHelpGenerating() {
702 System
.out
.println("Options for generating extra code for tracking code execution");
703 System
.out
.println(" --genEStackPrint generate print for all EStack changes");
704 System
.out
.println(" --genAddrPrint generate prints after every address of the original code ");
705 System
.out
.println(" --genAddrPause generate a pause after every address of the original code ");
706 System
.out
.println(" --genAddr short for --genAddrPrint and --genAddrPause");
707 System
.out
.println(" --genAll short for applying all code generation");
710 public void printHelpHelp() {
711 System
.out
.println("Help and info options");
712 System
.out
.println(" -h basic help");
713 System
.out
.println(" --help print more detailed help");
714 System
.out
.println(" --version or -version print version and exit");
717 public void printUsage(){
718 System
.out
.println("usage:\n\t mjc2wsl {options} filename [outfile]");
721 public void printVersion() {
722 System
.out
.println("MicroJava bytecode to WSL converter. v " + versionN
723 + ", by Doni Pracner");
726 public String
makeDefaultOutName(String inname
){
728 if (inname
.endsWith(".obj"))
729 rez
= rez
.substring(0, rez
.length() - 4);
733 public void run(String
[] args
) {
734 if (args
.length
== 0) {
738 while (i
< args
.length
&& args
[i
].charAt(0) == '-') {
739 if (args
[i
].compareTo("-h") == 0) {
742 } else if (args
[i
].compareTo("--help") == 0) {
745 } else if (args
[i
].compareTo("--version") == 0
746 || args
[i
].compareTo("-version") == 0) {
749 } else if (args
[i
].compareTo("-o") == 0
750 || args
[i
].startsWith("--oc")) {
751 if (args
[i
].length() == 2)
752 originalInComments
= true;
753 else if (args
[i
].length() == 5)
754 originalInComments
= args
[i
].charAt(4) == '+';
756 originalInComments
= true;
757 } else if (args
[i
].compareTo("--screen") == 0) {
758 out
= new PrintWriter(System
.out
);
759 } else if (args
[i
].compareTo("-d") == 0) {
760 messages
.setPrintLevel(TransMessages
.M_DEB
);// print debug info
761 } else if (args
[i
].compareTo("-v") == 0) {
762 messages
.setPrintLevel(TransMessages
.M_WAR
);// print warnings
763 } else if (args
[i
].compareTo("-q") == 0) {
764 messages
.setPrintLevel(TransMessages
.M_QUIET
);// no printing
765 } else if (args
[i
].compareToIgnoreCase("--genEStackPrint") == 0) {
766 genPrintEStackOnChange
= true;
767 } else if (args
[i
].compareToIgnoreCase("--genAddrPause") == 0) {
768 genPauseAfterEachAddress
= true;
769 } else if (args
[i
].compareToIgnoreCase("--genAddrPrint") == 0) {
770 genPrintForEachAddress
= true;
771 } else if (args
[i
].compareToIgnoreCase("--genAddr") == 0) {
772 genPrintForEachAddress
= true;
773 genPauseAfterEachAddress
= true;
774 } else if (args
[i
].compareToIgnoreCase("--genAll") == 0) {
775 genPrintEStackOnChange
= true;
776 genPrintForEachAddress
= true;
777 genPauseAfterEachAddress
= true;
782 if (i
>= args
.length
) {
783 System
.out
.println("no filename supplied");
786 File f
= new File(args
[i
]);
788 if (i
+ 1 < args
.length
) {
790 out
= new PrintWriter(args
[i
+ 1]);
791 } catch (Exception e
) {
792 System
.err
.println("error in opening out file:");
797 // if not set to screen, or a file, make a default filename
799 out
= new PrintWriter(makeDefaultOutName(args
[i
]));
800 } catch (Exception e
) {
801 System
.err
.println("error in opening out file:");
806 Calendar now
= Calendar
.getInstance();
808 long mili
= Calendar
.getInstance().getTimeInMillis()
809 - now
.getTimeInMillis();
810 System
.out
.println("conversion time:" + mili
+ " ms");
811 messages
.printMessageCounters();
814 System
.out
.println("file does not exist");
818 public static void main(String
[] args
) {
819 new mjc2wsl().run(args
);
Svarog.pmf.uns.ac.rs/gitweb
maintanance
Doni Pracner