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projekti pod git sistemom za održavanje verzija -- projects under
the git version control system
82ae9cc5744182c0b5e87d494dd43c8f7ddea44f
5 * This program converts file from compiled MicroJava bytecode to WSL language
6 * which is a part of the FermaT Transformation system. MicroJava is a subset
7 * used in Compiler Construction courses by Hanspeter Moessenboeck, not
10 * @author Doni Pracner, http://perun.dmi.rs/pracner http://quemaster.com
13 public static String versionN
= "0.1.4";
15 public static final int M_ERR
= 2, M_WAR
= 1, M_DEB
= 0;
17 private int printLevel
= M_ERR
;
19 private int[] messageCounters
= new int[M_ERR
+1];
21 private void message(String mes
, int level
){
22 if (level
>=printLevel
)
23 System
.out
.println(mes
);
24 messageCounters
[level
]++;
27 private void printMessageCounters(){
28 printMessageCounters(System
.out
);
31 private void printMessageCounters(PrintStream out
){
32 out
.println("total errors:"+messageCounters
[M_ERR
]+" warnings:"+messageCounters
[M_WAR
]);
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 public String
getStandardStart(){
112 return getStandardStart(10);
115 public String
getStandardStart(int numWords
){
116 StringBuilder ret
= new StringBuilder(
117 "C:\" This file automatically converted from microjava bytecode\";\n"
118 +"C:\" with mjc2wsl v "+versionN
+"\";\n");
120 ret
.append("VAR < tempa := 0, tempb := 0, tempres :=0,\n\t");
121 ret
.append("mjvm_locals := ARRAY(1,0), ");
122 ret
.append("\n\tmjvm_statics := ARRAY("+numWords
+",0), ");
123 ret
.append("\n\tmjvm_arrays := < >, ");
124 ret
.append("\n mjvm_estack := < >, mjvm_mstack := < >, ");
125 ret
.append("\n mjvm_fp := 0, mjvm_sp := 0,");
126 ret
.append("\n t_e_m_p := 0 > :");
128 return ret
.toString();
131 public String
getStandardEnd(){
132 return "SKIP\nENDVAR";
135 private boolean originalInComments
= false;
137 private HashMap
<Integer
,String
> opMap
= null;
139 private String opCodeFile
= "mj-bytecodes.properties";
141 private HashMap
<Integer
,String
> getOpMap() {
143 opMap
= new HashMap
<Integer
, String
> (60, 0.98f
);
145 BufferedReader in
= new BufferedReader(
146 new InputStreamReader(getClass().getResourceAsStream(opCodeFile
)));
147 String str
= in
.readLine();
148 while (str
!= null) {
149 String
[] ss
= str
.split("=");
150 opMap
.put(Integer
.parseInt(ss
[0]),ss
[1]);
154 }catch (Exception ex
) {
155 ex
.printStackTrace();
161 public String
getOpString(int op
) {
162 return getOpMap().get(op
);
165 public String
describeOpCode(int op
) {
166 return op
+ " (" + getOpString(op
) + ")";
169 private InputStream mainIn
;
170 private PrintWriter out
= null;
171 private int counter
= -1;
173 private void pr(int i
){
177 private void pr(char i
){
181 private void pr(String i
){
185 private void prl(String i
){
194 res
= res
<< 24 >>> 24;
195 } catch (IOException ex
) {
196 ex
.printStackTrace();
203 return (get() * 256 + get()) << 16 >> 16;
207 return (get2() << 16) + (get2() << 16 >>> 16);
210 private String
loc(int i
){
211 //arrays start at 1 in WSL, so we need an offset
212 return "mjvm_locals[" + (i
+1)+"]";
215 private String
genStatic(int i
){
216 return "mjvm_statics[" + (i
+1)+"]";
219 private String
genArray(int i
){
220 return "mjvm_arrays["+ i
+"]";
223 private String
genArray(String i
){
224 return "mjvm_arrays["+ i
+"]";
228 * Creates a WSL comment with care to quote chars.
230 public static String
createComment(String str
){
231 return createComment(str
, C_REG
);
235 * Creates a WSL comment with care to quote chars, of the
236 * given type. Types are given as char constants. They can be
237 * default comments, comments that contain the original code
238 * in them, or additional comments regarding the translation
241 public static String
createComment(String str
, char type
) {
242 return "C:\"" + type
+ str
.replace("\"", "''") + "\";";
247 private String
cmdToEStack(int i
) {
248 String res
= "mjvm_estack := <" + i
+ " > ++ mjvm_estack;";
249 if (genPrintEStackOnChange
) res
+="PRINT(\"eStack\",mjvm_estack);";
253 private String
cmdToEStack(String i
) {
254 String res
= "mjvm_estack := <" + i
+ " > ++ mjvm_estack;";
255 if (genPrintEStackOnChange
) res
+="PRINT(\"eStack\",mjvm_estack);";
259 private String
cmdFromEStack(String st
) {
260 String res
= st
+ " := HEAD(mjvm_estack); mjvm_estack := TAIL(mjvm_estack);";
261 if (genPrintEStackOnChange
) res
+="PRINT(\"eStack\",mjvm_estack);";
265 private String
cmdPopEStack() {
266 String res
= "mjvm_estack := TAIL(mjvm_estack);";
267 if (genPrintEStackOnChange
) res
+="PRINT(\"eStack\",mjvm_estack);";
272 private String
getTopTwo(){
273 return cmdFromEStack("tempa") + "\n" + cmdFromEStack("tempb");
276 private String
getTop() {
277 return cmdFromEStack("tempa");
282 private String
cmdToMStack(int i
) {
283 return "mjvm_mstack := <" + i
+ " > ++ mjvm_mstack;";
286 private String
cmdToMStack(String i
) {
287 return "mjvm_mstack := <" + i
+ " > ++ mjvm_mstack;";
290 private String
cmdFromMStack(String st
) {
291 return st
+ " := HEAD(mjvm_mstack); mjvm_mstack := TAIL(mjvm_mstack);";
294 private String
getRelationFor(int opcode
) throws Exception
{
296 case jeq
: return "=";
297 case jne
: return "<>";
298 case jlt
: return "<";
299 case jle
: return "<=";
300 case jgt
: return ">";
301 case jge
: return ">=";
303 throw new Exception("Wrong opcode for a relation");
306 private boolean isJumpCode(int opcode
) {
307 return (opcode
>=jmp
) && (opcode
<=jge
);
310 public void convertStream(InputStream ins
) throws Exception
{
313 byte m
= (byte) get();
314 byte j
= (byte) get();
315 if (m
!='M' || j
!='J')
316 throw new Exception("Wrong start of bytecode file");
317 int codesize
= get4();
318 int numberOfWords
= get4();
319 int mainAdr
= get4();
321 prl(getStandardStart(numberOfWords
));
322 prl("SKIP;\n ACTIONS A_S_start:\n A_S_start == CALL a"+(14+mainAdr
)+" END");
325 if (originalInComments
)
326 prl(createComment(describeOpCode(op
), C_OC
));
327 prl("a" + counter
+ " == ");
328 if (genPrintForEachAddress
) {
329 prl("PRINT(\"a"+counter
+"\");");
330 if (genPauseAfterEachAddress
)
331 prl("debug_disposable_string := @Read_Line(Standard_Input_Port);");
335 prl(cmdToEStack(loc(get())));
342 prl(cmdToEStack(loc(op
- load_0
)));
346 prl(cmdFromEStack(loc(get())));
353 prl(cmdFromEStack(loc(op
- store_0
)));
358 prl(cmdToEStack(genStatic(get2())));
362 prl(cmdFromEStack(genStatic(get2())));
365 //TODO getfield, putfield
368 prl(createComment("fields are not processed properly", C_ERR
));
369 message("fields are not processed properly", M_ERR
);
375 prl(cmdToEStack(get4()));
385 prl(cmdToEStack(op
- const_0
));
391 prl("tempres := tempb + tempa;");
392 prl(cmdToEStack("tempres"));
397 prl("tempres := tempb - tempa;");
398 prl(cmdToEStack("tempres"));
403 prl("tempres := tempb * tempa;");
404 prl(cmdToEStack("tempres"));
409 prl("IF tempa = 0 THEN ERROR(\"division by zero\") FI;");
410 prl("tempres := tempb DIV tempa;");
411 prl(cmdToEStack("tempres"));
416 prl("IF tempa = 0 THEN ERROR(\"division by zero\") FI;");
417 prl("tempres := tempb MOD tempa;");
418 prl(cmdToEStack("tempres"));
424 prl(cmdToEStack("-tempa"));
430 int b1
= get(), b2
= get();
431 prl(loc(b1
)+" := " +loc(b1
)+" + "+b2
+";");
436 prl(createComment("memory allocation not processed properly", C_ERR
));
437 message("memory allocation not processed properly", M_ERR
);
442 get();// 0 - bytes, 1 - words; ignore for now
443 //TODO take into consideration 0/1
445 prl("mjvm_arrays := mjvm_arrays ++ < ARRAY(tempa,0) >;");
446 prl(cmdToEStack("LENGTH(mjvm_arrays)"));
453 prl(cmdToEStack(genArray("tempb")+"[tempa+1]"));
458 prl(cmdFromEStack("tempres"));
460 //we need to use a temparray as a pointer, WSL
461 //otherwise tries to access it as a list of lists and fails
462 prl("VAR < tempArray := "+genArray("tempb")+" > :");
463 prl("tempArray[tempa+1]:=tempres ENDVAR;");
475 prl("CALL a" + (counter
+ get2()) + ";");
486 prl("IF tempb "+ getRelationFor(op
)
487 +" tempa THEN CALL a" + (counter
+ get2())
488 +" ELSE CALL a" + (counter
+1)
494 prl("CALL a" + (counter
+ get2()) + ";");
499 //we let the actions return
500 // there is nothing to clean up
501 prl("SKIP END b"+counter
+" ==");
505 int parameters
= get();
508 prl(cmdToMStack("mjvm_locals"));
509 prl("mjvm_locals := ARRAY("+locals
+",0);");
510 for (int i
= parameters
-1; i
>= 0; i
--)
511 prl(cmdFromEStack(loc(i
)));
515 prl(cmdFromMStack("mjvm_locals"));
521 //TODO make it a char for read
522 message("char is read like a number", M_WAR
);
523 prl(createComment("char is read like a number",C_SPEC
));
526 prl("tempa := @String_To_Num(@Read_Line(Standard_Input_Port));");
527 prl(cmdToEStack("tempa"));
533 // TODO need to make it a char on print
534 message("chars will be printed as number codes", M_WAR
);
535 prl(createComment("char will be printed as a number code",C_SPEC
));
538 // TODO printing numbers needs different lengths of spacing
540 pr(createComment("print spacing",C_SPEC
));
541 prl("IF tempa>1 THEN FOR i:=2 TO tempa STEP 1 DO PRINFLUSH(\" \") OD FI;");
542 prl("PRINFLUSH(tempb);");
547 prl("ERROR(\"Runtime error: trap("+get()+")\");");
553 prl(createComment("unknown op error: " + op
, C_ERR
));
554 message("unknown op error: "+ op
, M_ERR
);
558 boolean wasJump
= isJumpCode(op
);
564 prl("CALL a" + counter
+ " END");
566 prl("CALL Z;\nSKIP END\nENDACTIONS;\n");
567 prl(getStandardEnd());
571 public void convertFile(File f
) {
573 convertStream(new FileInputStream(f
));
574 } catch (Exception ex
) {
575 ex
.printStackTrace();
579 public void printHelp() {
580 System
.out
.println("MicroJava bytecode to WSL converter. v " + versionN
581 + ", by Doni Pracner");
582 System
.out
.println("usage:\n\t mjc2wsl {options} filename [outfile]");
583 System
.out
.println("options:\n\t--screen print output to screen");
584 System
.out
.println("\t-o --oc[+-] include original code in comments");
585 System
.out
.println("\t-v verbose, print warning messages");
586 System
.out
.println("\t-q don't print even the error messages");
587 System
.out
.println("\t-d print detailed debug messages");
590 public String
makeDefaultOutName(String inname
){
592 if (inname
.endsWith(".obj"))
593 rez
= rez
.substring(0, rez
.length() - 4);
597 public void run(String
[] args
) {
598 if (args
.length
== 0) {
602 while (i
< args
.length
&& args
[i
].charAt(0) == '-') {
603 if (args
[i
].compareTo("-h") == 0) {
606 } else if (args
[i
].compareTo("-o") == 0
607 || args
[i
].startsWith("--oc")) {
608 if (args
[i
].length() == 2)
609 originalInComments
= true;
610 else if (args
[i
].length() == 5)
611 originalInComments
= args
[i
].charAt(4) == '+';
613 originalInComments
= true;
614 } else if (args
[i
].compareTo("--screen") == 0) {
615 out
= new PrintWriter(System
.out
);
616 } else if (args
[i
].compareTo("-d") == 0) {
617 printLevel
= M_DEB
;//print debug info
618 } else if (args
[i
].compareTo("-v") == 0) {
619 printLevel
= M_WAR
;//print warnings
620 } else if (args
[i
].compareTo("-q") == 0) {
621 printLevel
= M_ERR
+1;//no printing
622 } else if (args
[i
].compareToIgnoreCase("--genEStackPrint") == 0) {
623 genPrintEStackOnChange
= true;
624 } else if (args
[i
].compareToIgnoreCase("--genAddrPause") == 0) {
625 genPauseAfterEachAddress
= true;
626 } else if (args
[i
].compareToIgnoreCase("--genAddrPrint") == 0) {
627 genPrintForEachAddress
= true;
628 } else if (args
[i
].compareToIgnoreCase("--genAddr") == 0) {
629 genPrintForEachAddress
= true;
630 genPauseAfterEachAddress
= true;
631 } else if (args
[i
].compareToIgnoreCase("--genAll") == 0) {
632 genPrintEStackOnChange
= true;
633 genPrintForEachAddress
= true;
634 genPauseAfterEachAddress
= true;
638 if (i
>= args
.length
) {
639 System
.out
.println("no filename supplied");
642 File f
= new File(args
[i
]);
644 if (i
+ 1 < args
.length
) {
646 out
= new PrintWriter(args
[i
+ 1]);
647 } catch (Exception e
) {
648 System
.err
.println("error in opening out file:");
653 // if not set to screen, or a file, make a default filename
655 out
= new PrintWriter(makeDefaultOutName(args
[i
]));
656 } catch (Exception e
) {
657 System
.err
.println("error in opening out file:");
662 Calendar now
= Calendar
.getInstance();
664 long mili
= Calendar
.getInstance().getTimeInMillis()
665 - now
.getTimeInMillis();
666 System
.out
.println("conversion time:" + mili
+ " ms");
667 printMessageCounters();
670 System
.out
.println("file does not exist");
674 public static void main(String
[] args
) {
675 new mjc2wsl().run(args
);
Svarog.pmf.uns.ac.rs/gitweb
maintanance
Doni Pracner