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projekti pod git sistemom za održavanje verzija -- projects under
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d098bd8e2069d97e23df332a754c6e835aa487b8
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 StringBuilder ret
= new StringBuilder(
113 "C:\" This file automatically converted from microjava bytecode\";\n"
114 +"C:\" with mjc2wsl v "+versionN
+"\";\n");
116 ret
.append("VAR < tempa := 0, tempb := 0, tempres :=0,\n\t");
117 ret
.append("mjvm_locals := ARRAY(1,0), ");
118 ret
.append("\n mjvm_estack := < >, mjvm_mstack := < >, ");
119 ret
.append("\n mjvm_fp := 0, mjvm_sp := 0,");
120 ret
.append("\n t_e_m_p := 0 > :");
122 return ret
.toString();
125 public String
getStandardEnd(){
126 return "SKIP\nENDVAR";
129 private boolean originalInComments
= false;
131 private HashMap
<Integer
,String
> opMap
= null;
133 private String opCodeFile
= "mj-bytecodes.properties";
135 private HashMap
<Integer
,String
> getOpMap() {
137 opMap
= new HashMap
<Integer
, String
> (60, 0.98f
);
139 BufferedReader in
= new BufferedReader(
140 new InputStreamReader(getClass().getResourceAsStream(opCodeFile
)));
141 String str
= in
.readLine();
142 while (str
!= null) {
143 String
[] ss
= str
.split("=");
144 opMap
.put(Integer
.parseInt(ss
[0]),ss
[1]);
148 }catch (Exception ex
) {
149 ex
.printStackTrace();
155 public String
getOpString(int op
) {
156 return getOpMap().get(op
);
159 public String
describeOpCode(int op
) {
160 return op
+ " (" + getOpString(op
) + ")";
163 private InputStream mainIn
;
164 private PrintWriter out
= null;
165 private int counter
= -1;
167 private void pr(int i
){
171 private void pr(char i
){
175 private void pr(String i
){
179 private void prl(String i
){
188 res
= res
<< 24 >>> 24;
189 } catch (IOException ex
) {
190 ex
.printStackTrace();
197 return (get() * 256 + get()) << 16 >> 16;
201 return (get2() << 16) + (get2() << 16 >>> 16);
204 private String
loc(int i
){
205 //arrays start at 1 in WSL, so we need an offset
206 return "mjvm_locals[" + (i
+1)+"]";
210 * Creates a WSL comment with care to quote chars.
212 public static String
createComment(String str
){
213 return createComment(str
, C_REG
);
217 * Creates a WSL comment with care to quote chars, of the
218 * given type. Types are given as char constants. They can be
219 * default comments, comments that contain the original code
220 * in them, or additional comments regarding the translation
223 public static String
createComment(String str
, char type
) {
224 return "C:\"" + type
+ str
.replace("\"", "''") + "\";";
229 private String
cmdToEStack(int i
) {
230 String res
= "mjvm_estack := <" + i
+ " > ++ mjvm_estack;";
231 if (genPrintEStackOnChange
) res
+="PRINT(\"eStack\",mjvm_estack);";
235 private String
cmdToEStack(String i
) {
236 String res
= "mjvm_estack := <" + i
+ " > ++ mjvm_estack;";
237 if (genPrintEStackOnChange
) res
+="PRINT(\"eStack\",mjvm_estack);";
241 private String
cmdFromEStack(String st
) {
242 String res
= st
+ " := HEAD(mjvm_estack); mjvm_estack := TAIL(mjvm_estack);";
243 if (genPrintEStackOnChange
) res
+="PRINT(\"eStack\",mjvm_estack);";
247 private String
getTopTwo(){
248 return cmdFromEStack("tempa") + "\n" + cmdFromEStack("tempb");
251 private String
getTop() {
252 return cmdFromEStack("tempa");
257 private String
cmdToMStack(int i
) {
258 return "mjvm_mstack := <" + i
+ " > ++ mjvm_mstack;";
261 private String
cmdToMStack(String i
) {
262 return "mjvm_mstack := <" + i
+ " > ++ mjvm_mstack;";
265 private String
cmdFromMStack(String st
) {
266 return st
+ " := HEAD(mjvm_mstack); mjvm_mstack := TAIL(mjvm_mstack);";
269 private String
getRelationFor(int opcode
) throws Exception
{
271 case jeq
: return "=";
272 case jne
: return "<>";
273 case jlt
: return "<";
274 case jle
: return "<=";
275 case jgt
: return ">";
276 case jge
: return ">=";
278 throw new Exception("Wrong opcode for a relation");
281 private boolean isJumpCode(int opcode
) {
282 return (opcode
>=jmp
) && (opcode
<=jge
);
285 public void convertStream(InputStream ins
) throws Exception
{
288 byte m
= (byte) get();
289 byte j
= (byte) get();
290 if (m
!='M' || j
!='J')
291 throw new Exception("Wrong start of bytecode file");
292 int codesize
= get4();
293 int numberOfWords
= get4();
294 int mainAdr
= get4();
296 prl(getStandardStart());
297 prl("SKIP;\n ACTIONS A_S_start:\n A_S_start == CALL a"+(14+mainAdr
)+" END");
300 if (originalInComments
)
301 prl(createComment(describeOpCode(op
), C_OC
));
302 prl("a" + counter
+ " == ");
303 if (genPrintForEachAddress
) {
304 prl("PRINT(\"a"+counter
+"\");");
305 if (genPauseAfterEachAddress
)
306 prl("debug_disposable_string := @Read_Line(Standard_Input_Port);");
310 prl(cmdToEStack(loc(get())));
317 prl(cmdToEStack(loc(op
- load_0
)));
321 prl(cmdFromEStack(loc(get())));
328 prl(cmdFromEStack(loc(op
- store_0
)));
332 //TODO getstatic, putstatic
333 //TODO getfield, putfield
336 prl(cmdToEStack(get4()));
346 prl(cmdToEStack(op
- const_0
));
352 prl("tempres := tempb + tempa;");
353 prl(cmdToEStack("tempres"));
358 prl("tempres := tempb - tempa;");
359 prl(cmdToEStack("tempres"));
364 prl("tempres := tempb * tempa;");
365 prl(cmdToEStack("tempres"));
370 prl("IF tempa = 0 THEN ERROR(\"division by zero\") FI;");
371 prl("tempres := tempb DIV tempa;");
372 prl(cmdToEStack("tempres"));
377 prl("IF tempa = 0 THEN ERROR(\"division by zero\") FI;");
378 prl("tempres := tempb MOD tempa;");
379 prl(cmdToEStack("tempres"));
383 //TODO neg, shl, shr, inc
385 //TODO aload, asstore, baload, bastore
387 //TODO pop, dup, dup2
390 prl("CALL a" + (counter
+ get2()) + ";");
401 prl("IF tempb "+ getRelationFor(op
)
402 +" tempa THEN CALL a" + (counter
+ get2())
403 +" ELSE CALL a" + (counter
+1)
409 prl(cmdToMStack(counter
+2));
410 prl("CALL a" + (counter
+ get2()) + ";");
415 prl("IF EMPTY?(mjvm_mstack) THEN CALL Z ELSE");
416 //else we let things return
417 prl(cmdFromMStack("tempa"));
419 prl("END b"+counter
+" ==");
423 int parameters
= get();
426 prl(cmdToMStack("mjvm_locals"));
427 prl("mjvm_locals := ARRAY("+locals
+",0);");
428 for (int i
= parameters
-1; i
>= 0; i
--)
429 prl(cmdFromEStack(loc(i
)));
433 prl(cmdFromMStack("mjvm_locals"));
439 prl("tempa := @String_To_Num(@Read_Line(Standard_Input_Port));");
440 prl(cmdToEStack("tempa"));
447 prl("PRINT(tempb);");
451 // TODO need to make it a char
453 prl("PRINT(tempb);");
458 prl("ERROR(\"Runtime error: trap("+get()+")\");");
464 prl(createComment("unknown op error: " + op
, C_ERR
));
465 message("unknown op error: "+ op
, M_ERR
);
469 boolean wasJump
= isJumpCode(op
);
475 prl("CALL a" + counter
+ " END");
477 prl("CALL Z;\nSKIP END\nENDACTIONS;\n");
478 prl(getStandardEnd());
482 public void convertFile(File f
) {
484 convertStream(new FileInputStream(f
));
485 } catch (Exception ex
) {
486 ex
.printStackTrace();
490 public void printHelp() {
491 System
.out
.println("MicroJava bytecode to WSL converter. v " + versionN
492 + ", by Doni Pracner");
493 System
.out
.println("usage:\n\t mjc2wsl {options} filename [outfile]");
494 System
.out
.println("options:\n\t--screen print output to screen");
495 System
.out
.println("\t-o --oc[+-] include original code in comments");
496 System
.out
.println("\t-v verbose, print warning messages");
497 System
.out
.println("\t-q don't print even the error messages");
498 System
.out
.println("\t-d print detailed debug messages");
501 public String
makeDefaultOutName(String inname
){
503 if (inname
.endsWith(".obj"))
504 rez
= rez
.substring(0, rez
.length() - 4);
508 public void run(String
[] args
) {
509 if (args
.length
== 0) {
513 while (i
< args
.length
&& args
[i
].charAt(0) == '-') {
514 if (args
[i
].compareTo("-h") == 0) {
517 } else if (args
[i
].compareTo("-o") == 0
518 || args
[i
].startsWith("--oc")) {
519 if (args
[i
].length() == 2)
520 originalInComments
= true;
521 else if (args
[i
].length() == 5)
522 originalInComments
= args
[i
].charAt(4) == '+';
524 originalInComments
= true;
525 } else if (args
[i
].compareTo("--screen") == 0) {
526 out
= new PrintWriter(System
.out
);
527 } else if (args
[i
].compareTo("-d") == 0) {
528 printLevel
= M_DEB
;//print debug info
529 } else if (args
[i
].compareTo("-v") == 0) {
530 printLevel
= M_WAR
;//print warnings
531 } else if (args
[i
].compareTo("-q") == 0) {
532 printLevel
= M_ERR
+1;//no printing
533 } else if (args
[i
].compareToIgnoreCase("--genEStackPrint") == 0) {
534 genPrintEStackOnChange
= true;
535 } else if (args
[i
].compareToIgnoreCase("--genAddrPause") == 0) {
536 genPauseAfterEachAddress
= true;
537 } else if (args
[i
].compareToIgnoreCase("--genAddrPrint") == 0) {
538 genPrintForEachAddress
= true;
539 } else if (args
[i
].compareToIgnoreCase("--genAddr") == 0) {
540 genPrintForEachAddress
= true;
541 genPauseAfterEachAddress
= true;
542 } else if (args
[i
].compareToIgnoreCase("--genAll") == 0) {
543 genPrintEStackOnChange
= true;
544 genPrintForEachAddress
= true;
545 genPauseAfterEachAddress
= true;
549 if (i
>= args
.length
) {
550 System
.out
.println("no filename supplied");
553 File f
= new File(args
[i
]);
555 if (i
+ 1 < args
.length
) {
557 out
= new PrintWriter(args
[i
+ 1]);
558 } catch (Exception e
) {
559 System
.err
.println("error in opening out file:");
564 // if not set to screen, or a file, make a default filename
566 out
= new PrintWriter(makeDefaultOutName(args
[i
]));
567 } catch (Exception e
) {
568 System
.err
.println("error in opening out file:");
573 Calendar now
= Calendar
.getInstance();
575 long mili
= Calendar
.getInstance().getTimeInMillis()
576 - now
.getTimeInMillis();
577 System
.out
.println("conversion time:" + mili
+ " ms");
578 printMessageCounters();
581 System
.out
.println("file does not exist");
585 public static void main(String
[] args
) {
586 new mjc2wsl().run(args
);
Svarog.pmf.uns.ac.rs/gitweb
maintanance
Doni Pracner