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22b506612f274ce63eb645b7e7e493924bd3a8f8
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("VAR < tempa := 0, tempb := 0, tempres :=0,\n\t");
196 ret
.append("mjvm_locals := ARRAY(1,0), ");
197 ret
.append("\n\tmjvm_statics := ARRAY("+numWords
+",0), ");
198 ret
.append("\n\tmjvm_arrays := < >, ");
199 ret
.append("\n\tmjvm_objects := < >, ");
200 ret
.append("\n mjvm_estack := < >, mjvm_mstack := < >, ");
201 ret
.append("\n mjvm_fp := 0, mjvm_sp := 0,");
202 ret
.append("\n t_e_m_p := 0 > :");
204 return ret
.toString();
207 public String
createStandardEnd(){
208 return "SKIP\nENDVAR";
211 private String
createLocal(int i
) {
212 // arrays start at 1 in WSL, so we need an offset
213 return "mjvm_locals[" + (i
+ 1) + "]";
216 private String
createStatic(int i
) {
217 return "mjvm_statics[" + (i
+ 1) + "]";
220 private String
createArray(int i
) {
221 return "mjvm_arrays[" + i
+ "]";
224 private String
createArray(String i
) {
225 return "mjvm_arrays[" + i
+ "]";
228 private String
createObject(String i
) {
229 return "mjvm_objects[" + i
+ "]";
233 * Creates a WSL comment with care to quote chars.
235 public static String
createComment(String str
){
236 return createComment(str
, C_REG
);
240 * Creates a WSL comment with care to quote chars, of the
241 * given type. Types are given as char constants. They can be
242 * default comments, comments that contain the original code
243 * in them, or additional comments regarding the translation
246 public static String
createComment(String str
, char type
) {
247 return "C:\"" + type
+ str
.replace("\"", "''") + "\";";
252 private String
createToEStack(int i
) {
253 String res
= "mjvm_estack := <" + i
+ " > ++ mjvm_estack;";
254 if (genPrintEStackOnChange
)
255 res
+= "PRINT(\"eStack\",mjvm_estack);";
259 private String
createToEStack(String i
) {
260 String res
= "mjvm_estack := <" + i
+ " > ++ mjvm_estack;";
261 if (genPrintEStackOnChange
)
262 res
+= "PRINT(\"eStack\",mjvm_estack);";
266 private String
createFromEStack(String st
) {
268 + " := HEAD(mjvm_estack); mjvm_estack := TAIL(mjvm_estack);";
269 if (genPrintEStackOnChange
)
270 res
+= "PRINT(\"eStack\",mjvm_estack);";
274 private String
createPopEStack() {
275 String res
= "mjvm_estack := TAIL(mjvm_estack);";
276 if (genPrintEStackOnChange
)
277 res
+= "PRINT(\"eStack\",mjvm_estack);";
281 private String
createTopTwoEStack() {
282 return createFromEStack("tempa") + "\n" + createFromEStack("tempb");
285 private String
createTopEStack() {
286 return createFromEStack("tempa");
291 private String
createToMStack(int i
) {
292 return "mjvm_mstack := <" + i
+ " > ++ mjvm_mstack;";
295 private String
createToMStack(String i
) {
296 return "mjvm_mstack := <" + i
+ " > ++ mjvm_mstack;";
299 private String
createFromMStack(String st
) {
300 return st
+ " := HEAD(mjvm_mstack); mjvm_mstack := TAIL(mjvm_mstack);";
303 private String
getRelationFor(int opcode
) throws Exception
{
305 case jeq
: return "=";
306 case jne
: return "<>";
307 case jlt
: return "<";
308 case jle
: return "<=";
309 case jgt
: return ">";
310 case jge
: return ">=";
312 throw new Exception("Wrong opcode for a relation");
315 private boolean isJumpCode(int opcode
) {
316 return (opcode
>= jmp
) && (opcode
<= jge
);
319 public void convertStream(InputStream ins
) throws Exception
{
322 byte m
= (byte) get();
323 byte j
= (byte) get();
324 if (m
!='M' || j
!='J')
325 throw new Exception("Wrong start of bytecode file");
326 int codesize
= get4();
327 int numberOfWords
= get4();
328 int mainAdr
= get4();
330 prl(createStandardStart(numberOfWords
));
331 prl("SKIP;\n ACTIONS A_S_start:\n A_S_start == CALL a" + (14 + mainAdr
)
335 if (originalInComments
)
336 prl(createComment(describeOpCode(op
), C_OC
));
337 prl("a" + counter
+ " == ");
338 if (genPrintForEachAddress
) {
339 prl("PRINT(\"a" + counter
+ "\");");
340 if (genPauseAfterEachAddress
)
341 prl("debug_disposable_string := @Read_Line(Standard_Input_Port);");
345 prl(createToEStack(createLocal(get())));
352 prl(createToEStack(createLocal(op
- load_0
)));
356 prl(createFromEStack(createLocal(get())));
363 prl(createFromEStack(createLocal(op
- store_0
)));
368 prl(createToEStack(createStatic(get2())));
372 prl(createFromEStack(createStatic(get2())));
378 prl(createTopEStack());
379 prl(createToEStack(createObject("tempa") + "[" + (f
+ 1) + "]"));
384 // we need to use a temparray as a pointer, WSL
385 // otherwise tries to access it as a list of lists and fails
386 prl(createTopTwoEStack());
387 prl("VAR < tempArray := " + createObject("tempb") + " > :");
388 prl("tempArray[" + (f
+ 1) + "]:=tempa ENDVAR;");
393 prl(createToEStack(get4()));
403 prl(createToEStack(op
- const_0
));
408 prl(createTopTwoEStack());
409 prl("tempres := tempb + tempa;");
410 prl(createToEStack("tempres"));
414 prl(createTopTwoEStack());
415 prl("tempres := tempb - tempa;");
416 prl(createToEStack("tempres"));
420 prl(createTopTwoEStack());
421 prl("tempres := tempb * tempa;");
422 prl(createToEStack("tempres"));
426 prl(createTopTwoEStack());
427 prl("IF tempa = 0 THEN ERROR(\"division by zero\") FI;");
428 prl("tempres := tempb DIV tempa;");
429 prl(createToEStack("tempres"));
433 prl(createTopTwoEStack());
434 prl("IF tempa = 0 THEN ERROR(\"division by zero\") FI;");
435 prl("tempres := tempb MOD tempa;");
436 prl(createToEStack("tempres"));
441 prl(createTopEStack());
442 prl(createToEStack("-tempa"));
447 prl(createTopTwoEStack());
448 prl("VAR <tempres :=tempb, i:=1 >:");
449 prl("\tFOR i:=1 TO tempa STEP 1 DO tempres := tempres * 2 OD;");
450 prl(createToEStack("tempres"));
455 prl(createTopTwoEStack());
456 prl("VAR <tempres :=tempb, i:=1 >:");
457 prl("\tFOR i:=1 TO tempa STEP 1 DO tempres := tempres DIV 2 OD;");
458 prl(createToEStack("tempres"));
464 int b1
= get(), b2
= get();
465 prl(createLocal(b1
) + " := " + createLocal(b1
) + " + " + b2
+ ";");
471 // TODO maybe objects and arrays should be in the same list?
472 prl("mjvm_objects := mjvm_objects ++ < ARRAY(" + size
474 prl(createToEStack("LENGTH(mjvm_objects)"));
478 get();// 0 - bytes, 1 - words; ignore for now
479 // TODO take into consideration 0/1
480 prl(createTopEStack());
481 prl("mjvm_arrays := mjvm_arrays ++ < ARRAY(tempa,0) >;");
482 prl(createToEStack("LENGTH(mjvm_arrays)"));
488 prl(createTopTwoEStack());
489 prl(createToEStack(createArray("tempb") + "[tempa+1]"));
494 prl(createFromEStack("tempres"));
495 prl(createTopTwoEStack());
496 // we need to use a temparray as a pointer, WSL
497 // otherwise tries to access it as a list of lists and fails
498 prl("VAR < tempArray := " + createArray("tempb") + " > :");
499 prl("tempArray[tempa+1]:=tempres ENDVAR;");
503 prl(createTopEStack());
504 // TODO make an array length function of some sort!
506 "array length not known - LENGTH not aplicable to arrays",
508 messages
.message("array length not known - LENGTH not aplicable to arrays", TransMessages
.M_ERR
);
509 prl(createComment("put 1 on the stack for consistency", C_SPEC
));
510 prl(createToEStack(1));
515 prl(createTopEStack());
516 prl(createToEStack("tempa"));
517 prl(createToEStack("tempa"));
521 prl(createTopTwoEStack());
522 prl(createToEStack("tempb"));
523 prl(createToEStack("tempa"));
524 prl(createToEStack("tempb"));
525 prl(createToEStack("tempa"));
530 prl(createPopEStack());
535 prl("CALL a" + (counter
+ get2()) + ";");
545 prl(createTopTwoEStack());
546 prl("IF tempb " + getRelationFor(op
) + " tempa THEN CALL a"
547 + (counter
+ get2()) + " ELSE CALL a" + (counter
+ 1)
553 prl("CALL a" + (counter
+ get2()) + ";");
558 // we let the actions return
559 // there is nothing to clean up
560 prl("SKIP END b" + counter
+ " ==");
564 int parameters
= get();
567 prl(createToMStack("mjvm_locals"));
568 prl("mjvm_locals := ARRAY(" + locals
+ ",0);");
569 for (int i
= parameters
- 1; i
>= 0; i
--)
570 prl(createFromEStack(createLocal(i
)));
574 prl(createFromMStack("mjvm_locals"));
580 // TODO make it a char for read
581 messages
.message("char is read like a number", TransMessages
.M_WAR
);
582 prl(createComment("char is read like a number", C_SPEC
));
585 prl("tempa := @String_To_Num(@Read_Line(Standard_Input_Port));");
586 prl(createToEStack("tempa"));
592 // TODO need to make it a char on print
593 messages
.message("chars will be printed as number codes", TransMessages
.M_WAR
);
594 prl(createComment("char will be printed as a number code",
598 // TODO printing numbers needs different lengths of spacing
599 prl(createTopTwoEStack());
600 pr(createComment("print spacing", C_SPEC
));
601 prl("IF tempa>1 THEN FOR i:=2 TO tempa STEP 1 DO PRINFLUSH(\" \") OD FI;");
602 prl("PRINFLUSH(tempb);");
607 prl("ERROR(\"Runtime error: trap(" + get() + ")\");");
612 prl(createComment("unknown op error: " + op
, C_ERR
));
613 messages
.message("unknown op error: " + op
, TransMessages
.M_ERR
);
617 boolean wasJump
= isJumpCode(op
);
623 prl("CALL a" + counter
+ " END");
625 prl("CALL Z;\nSKIP END\nENDACTIONS;\n");
626 prl(createStandardEnd());
629 public void convertFile(File f
) {
631 convertStream(new FileInputStream(f
));
632 } catch (Exception ex
) {
633 ex
.printStackTrace();
637 public void printHelp() {
638 System
.out
.println("MicroJava bytecode to WSL converter. v " + versionN
639 + ", by Doni Pracner");
640 System
.out
.println("usage:\n\t mjc2wsl {options} filename [outfile]");
641 System
.out
.println("options:\n\t--screen print output to screen");
642 System
.out
.println("\t-o --oc[+-] include original code in comments");
643 System
.out
.println("\t-v verbose, print warning messages");
644 System
.out
.println("\t-q don't print even the error messages");
645 System
.out
.println("\t-d print detailed debug messages");
648 public String
makeDefaultOutName(String inname
){
650 if (inname
.endsWith(".obj"))
651 rez
= rez
.substring(0, rez
.length() - 4);
655 public void run(String
[] args
) {
656 if (args
.length
== 0) {
660 while (i
< args
.length
&& args
[i
].charAt(0) == '-') {
661 if (args
[i
].compareTo("-h") == 0) {
664 } else if (args
[i
].compareTo("-o") == 0
665 || args
[i
].startsWith("--oc")) {
666 if (args
[i
].length() == 2)
667 originalInComments
= true;
668 else if (args
[i
].length() == 5)
669 originalInComments
= args
[i
].charAt(4) == '+';
671 originalInComments
= true;
672 } else if (args
[i
].compareTo("--screen") == 0) {
673 out
= new PrintWriter(System
.out
);
674 } else if (args
[i
].compareTo("-d") == 0) {
675 messages
.setPrintLevel(TransMessages
.M_DEB
);// print debug info
676 } else if (args
[i
].compareTo("-v") == 0) {
677 messages
.setPrintLevel(TransMessages
.M_WAR
);// print warnings
678 } else if (args
[i
].compareTo("-q") == 0) {
679 messages
.setPrintLevel(TransMessages
.M_QUIET
);// no printing
680 } else if (args
[i
].compareToIgnoreCase("--genEStackPrint") == 0) {
681 genPrintEStackOnChange
= true;
682 } else if (args
[i
].compareToIgnoreCase("--genAddrPause") == 0) {
683 genPauseAfterEachAddress
= true;
684 } else if (args
[i
].compareToIgnoreCase("--genAddrPrint") == 0) {
685 genPrintForEachAddress
= true;
686 } else if (args
[i
].compareToIgnoreCase("--genAddr") == 0) {
687 genPrintForEachAddress
= true;
688 genPauseAfterEachAddress
= true;
689 } else if (args
[i
].compareToIgnoreCase("--genAll") == 0) {
690 genPrintEStackOnChange
= true;
691 genPrintForEachAddress
= true;
692 genPauseAfterEachAddress
= true;
697 if (i
>= args
.length
) {
698 System
.out
.println("no filename supplied");
701 File f
= new File(args
[i
]);
703 if (i
+ 1 < args
.length
) {
705 out
= new PrintWriter(args
[i
+ 1]);
706 } catch (Exception e
) {
707 System
.err
.println("error in opening out file:");
712 // if not set to screen, or a file, make a default filename
714 out
= new PrintWriter(makeDefaultOutName(args
[i
]));
715 } catch (Exception e
) {
716 System
.err
.println("error in opening out file:");
721 Calendar now
= Calendar
.getInstance();
723 long mili
= Calendar
.getInstance().getTimeInMillis()
724 - now
.getTimeInMillis();
725 System
.out
.println("conversion time:" + mili
+ " ms");
726 messages
.printMessageCounters();
729 System
.out
.println("file does not exist");
733 public static void main(String
[] args
) {
734 new mjc2wsl().run(args
);
Svarog.pmf.uns.ac.rs/gitweb
maintanance
Doni Pracner