gitweb on Svarog
projekti pod git sistemom za održavanje verzija -- projects under
the git version control system
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\tmjvm_objects := < >, ");
125 ret
.append("\n mjvm_estack := < >, mjvm_mstack := < >, ");
126 ret
.append("\n mjvm_fp := 0, mjvm_sp := 0,");
127 ret
.append("\n t_e_m_p := 0 > :");
129 return ret
.toString();
132 public String
getStandardEnd(){
133 return "SKIP\nENDVAR";
136 private boolean originalInComments
= false;
138 private HashMap
<Integer
,String
> opMap
= null;
140 private String opCodeFile
= "mj-bytecodes.properties";
142 private HashMap
<Integer
,String
> getOpMap() {
144 opMap
= new HashMap
<Integer
, String
> (60, 0.98f
);
146 BufferedReader in
= new BufferedReader(
147 new InputStreamReader(getClass().getResourceAsStream(opCodeFile
)));
148 String str
= in
.readLine();
149 while (str
!= null) {
150 String
[] ss
= str
.split("=");
151 opMap
.put(Integer
.parseInt(ss
[0]),ss
[1]);
155 }catch (Exception ex
) {
156 ex
.printStackTrace();
162 public String
getOpString(int op
) {
163 return getOpMap().get(op
);
166 public String
describeOpCode(int op
) {
167 return op
+ " (" + getOpString(op
) + ")";
170 private InputStream mainIn
;
171 private PrintWriter out
= null;
172 private int counter
= -1;
174 private void pr(int i
){
178 private void pr(char i
){
182 private void pr(String i
){
186 private void prl(String i
){
195 res
= res
<< 24 >>> 24;
196 } catch (IOException ex
) {
197 ex
.printStackTrace();
204 return (get() * 256 + get()) << 16 >> 16;
208 return (get2() << 16) + (get2() << 16 >>> 16);
211 private String
loc(int i
){
212 //arrays start at 1 in WSL, so we need an offset
213 return "mjvm_locals[" + (i
+1)+"]";
216 private String
genStatic(int i
){
217 return "mjvm_statics[" + (i
+1)+"]";
220 private String
genArray(int i
){
221 return "mjvm_arrays["+ i
+"]";
224 private String
genArray(String i
){
225 return "mjvm_arrays["+ i
+"]";
228 private String
genObject(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
cmdToEStack(int i
) {
253 String res
= "mjvm_estack := <" + i
+ " > ++ mjvm_estack;";
254 if (genPrintEStackOnChange
) res
+="PRINT(\"eStack\",mjvm_estack);";
258 private String
cmdToEStack(String i
) {
259 String res
= "mjvm_estack := <" + i
+ " > ++ mjvm_estack;";
260 if (genPrintEStackOnChange
) res
+="PRINT(\"eStack\",mjvm_estack);";
264 private String
cmdFromEStack(String st
) {
265 String res
= st
+ " := HEAD(mjvm_estack); mjvm_estack := TAIL(mjvm_estack);";
266 if (genPrintEStackOnChange
) res
+="PRINT(\"eStack\",mjvm_estack);";
270 private String
cmdPopEStack() {
271 String res
= "mjvm_estack := TAIL(mjvm_estack);";
272 if (genPrintEStackOnChange
) res
+="PRINT(\"eStack\",mjvm_estack);";
277 private String
getTopTwo(){
278 return cmdFromEStack("tempa") + "\n" + cmdFromEStack("tempb");
281 private String
getTop() {
282 return cmdFromEStack("tempa");
287 private String
cmdToMStack(int i
) {
288 return "mjvm_mstack := <" + i
+ " > ++ mjvm_mstack;";
291 private String
cmdToMStack(String i
) {
292 return "mjvm_mstack := <" + i
+ " > ++ mjvm_mstack;";
295 private String
cmdFromMStack(String st
) {
296 return st
+ " := HEAD(mjvm_mstack); mjvm_mstack := TAIL(mjvm_mstack);";
299 private String
getRelationFor(int opcode
) throws Exception
{
301 case jeq
: return "=";
302 case jne
: return "<>";
303 case jlt
: return "<";
304 case jle
: return "<=";
305 case jgt
: return ">";
306 case jge
: return ">=";
308 throw new Exception("Wrong opcode for a relation");
311 private boolean isJumpCode(int opcode
) {
312 return (opcode
>=jmp
) && (opcode
<=jge
);
315 public void convertStream(InputStream ins
) throws Exception
{
318 byte m
= (byte) get();
319 byte j
= (byte) get();
320 if (m
!='M' || j
!='J')
321 throw new Exception("Wrong start of bytecode file");
322 int codesize
= get4();
323 int numberOfWords
= get4();
324 int mainAdr
= get4();
326 prl(getStandardStart(numberOfWords
));
327 prl("SKIP;\n ACTIONS A_S_start:\n A_S_start == CALL a"+(14+mainAdr
)+" END");
330 if (originalInComments
)
331 prl(createComment(describeOpCode(op
), C_OC
));
332 prl("a" + counter
+ " == ");
333 if (genPrintForEachAddress
) {
334 prl("PRINT(\"a"+counter
+"\");");
335 if (genPauseAfterEachAddress
)
336 prl("debug_disposable_string := @Read_Line(Standard_Input_Port);");
340 prl(cmdToEStack(loc(get())));
347 prl(cmdToEStack(loc(op
- load_0
)));
351 prl(cmdFromEStack(loc(get())));
358 prl(cmdFromEStack(loc(op
- store_0
)));
363 prl(cmdToEStack(genStatic(get2())));
367 prl(cmdFromEStack(genStatic(get2())));
374 prl(cmdToEStack(genObject("tempa")+"["+(f
+1)+"]"));
379 //we need to use a temparray as a pointer, WSL
380 //otherwise tries to access it as a list of lists and fails
382 prl("VAR < tempArray := "+genObject("tempb")+" > :");
383 prl("tempArray["+(f
+1)+"]:=tempa ENDVAR;");
388 prl(cmdToEStack(get4()));
398 prl(cmdToEStack(op
- const_0
));
404 prl("tempres := tempb + tempa;");
405 prl(cmdToEStack("tempres"));
410 prl("tempres := tempb - tempa;");
411 prl(cmdToEStack("tempres"));
416 prl("tempres := tempb * tempa;");
417 prl(cmdToEStack("tempres"));
422 prl("IF tempa = 0 THEN ERROR(\"division by zero\") FI;");
423 prl("tempres := tempb DIV tempa;");
424 prl(cmdToEStack("tempres"));
429 prl("IF tempa = 0 THEN ERROR(\"division by zero\") FI;");
430 prl("tempres := tempb MOD tempa;");
431 prl(cmdToEStack("tempres"));
437 prl(cmdToEStack("-tempa"));
443 int b1
= get(), b2
= get();
444 prl(loc(b1
)+" := " +loc(b1
)+" + "+b2
+";");
450 //TODO maybe objects and arrays should be in the same list?
451 prl("mjvm_objects := mjvm_objects ++ < ARRAY("+size
+",0) >;");
452 prl(cmdToEStack("LENGTH(mjvm_objects)"));
456 get();// 0 - bytes, 1 - words; ignore for now
457 //TODO take into consideration 0/1
459 prl("mjvm_arrays := mjvm_arrays ++ < ARRAY(tempa,0) >;");
460 prl(cmdToEStack("LENGTH(mjvm_arrays)"));
467 prl(cmdToEStack(genArray("tempb")+"[tempa+1]"));
472 prl(cmdFromEStack("tempres"));
474 //we need to use a temparray as a pointer, WSL
475 //otherwise tries to access it as a list of lists and fails
476 prl("VAR < tempArray := "+genArray("tempb")+" > :");
477 prl("tempArray[tempa+1]:=tempres ENDVAR;");
482 //TODO make an array length function of some sort!
483 prl(createComment("array length not known - LENGTH not aplicable to arrays",C_ERR
));
484 message("array length not known - LENGTH not aplicable to arrays",M_ERR
);
485 prl(createComment("put 1 on the stack for consistency",C_SPEC
));
492 prl(cmdToEStack("tempa"));
493 prl(cmdToEStack("tempa"));
498 prl(cmdToEStack("tempb"));
499 prl(cmdToEStack("tempa"));
500 prl(cmdToEStack("tempb"));
501 prl(cmdToEStack("tempa"));
511 prl("CALL a" + (counter
+ get2()) + ";");
522 prl("IF tempb "+ getRelationFor(op
)
523 +" tempa THEN CALL a" + (counter
+ get2())
524 +" ELSE CALL a" + (counter
+1)
530 prl("CALL a" + (counter
+ get2()) + ";");
535 //we let the actions return
536 // there is nothing to clean up
537 prl("SKIP END b"+counter
+" ==");
541 int parameters
= get();
544 prl(cmdToMStack("mjvm_locals"));
545 prl("mjvm_locals := ARRAY("+locals
+",0);");
546 for (int i
= parameters
-1; i
>= 0; i
--)
547 prl(cmdFromEStack(loc(i
)));
551 prl(cmdFromMStack("mjvm_locals"));
557 //TODO make it a char for read
558 message("char is read like a number", M_WAR
);
559 prl(createComment("char is read like a number",C_SPEC
));
562 prl("tempa := @String_To_Num(@Read_Line(Standard_Input_Port));");
563 prl(cmdToEStack("tempa"));
569 // TODO need to make it a char on print
570 message("chars will be printed as number codes", M_WAR
);
571 prl(createComment("char will be printed as a number code",C_SPEC
));
574 // TODO printing numbers needs different lengths of spacing
576 pr(createComment("print spacing",C_SPEC
));
577 prl("IF tempa>1 THEN FOR i:=2 TO tempa STEP 1 DO PRINFLUSH(\" \") OD FI;");
578 prl("PRINFLUSH(tempb);");
583 prl("ERROR(\"Runtime error: trap("+get()+")\");");
589 prl(createComment("unknown op error: " + op
, C_ERR
));
590 message("unknown op error: "+ op
, M_ERR
);
594 boolean wasJump
= isJumpCode(op
);
600 prl("CALL a" + counter
+ " END");
602 prl("CALL Z;\nSKIP END\nENDACTIONS;\n");
603 prl(getStandardEnd());
607 public void convertFile(File f
) {
609 convertStream(new FileInputStream(f
));
610 } catch (Exception ex
) {
611 ex
.printStackTrace();
615 public void printHelp() {
616 System
.out
.println("MicroJava bytecode to WSL converter. v " + versionN
617 + ", by Doni Pracner");
618 System
.out
.println("usage:\n\t mjc2wsl {options} filename [outfile]");
619 System
.out
.println("options:\n\t--screen print output to screen");
620 System
.out
.println("\t-o --oc[+-] include original code in comments");
621 System
.out
.println("\t-v verbose, print warning messages");
622 System
.out
.println("\t-q don't print even the error messages");
623 System
.out
.println("\t-d print detailed debug messages");
626 public String
makeDefaultOutName(String inname
){
628 if (inname
.endsWith(".obj"))
629 rez
= rez
.substring(0, rez
.length() - 4);
633 public void run(String
[] args
) {
634 if (args
.length
== 0) {
638 while (i
< args
.length
&& args
[i
].charAt(0) == '-') {
639 if (args
[i
].compareTo("-h") == 0) {
642 } else if (args
[i
].compareTo("-o") == 0
643 || args
[i
].startsWith("--oc")) {
644 if (args
[i
].length() == 2)
645 originalInComments
= true;
646 else if (args
[i
].length() == 5)
647 originalInComments
= args
[i
].charAt(4) == '+';
649 originalInComments
= true;
650 } else if (args
[i
].compareTo("--screen") == 0) {
651 out
= new PrintWriter(System
.out
);
652 } else if (args
[i
].compareTo("-d") == 0) {
653 printLevel
= M_DEB
;//print debug info
654 } else if (args
[i
].compareTo("-v") == 0) {
655 printLevel
= M_WAR
;//print warnings
656 } else if (args
[i
].compareTo("-q") == 0) {
657 printLevel
= M_ERR
+1;//no printing
658 } else if (args
[i
].compareToIgnoreCase("--genEStackPrint") == 0) {
659 genPrintEStackOnChange
= true;
660 } else if (args
[i
].compareToIgnoreCase("--genAddrPause") == 0) {
661 genPauseAfterEachAddress
= true;
662 } else if (args
[i
].compareToIgnoreCase("--genAddrPrint") == 0) {
663 genPrintForEachAddress
= true;
664 } else if (args
[i
].compareToIgnoreCase("--genAddr") == 0) {
665 genPrintForEachAddress
= true;
666 genPauseAfterEachAddress
= true;
667 } else if (args
[i
].compareToIgnoreCase("--genAll") == 0) {
668 genPrintEStackOnChange
= true;
669 genPrintForEachAddress
= true;
670 genPauseAfterEachAddress
= true;
674 if (i
>= args
.length
) {
675 System
.out
.println("no filename supplied");
678 File f
= new File(args
[i
]);
680 if (i
+ 1 < args
.length
) {
682 out
= new PrintWriter(args
[i
+ 1]);
683 } catch (Exception e
) {
684 System
.err
.println("error in opening out file:");
689 // if not set to screen, or a file, make a default filename
691 out
= new PrintWriter(makeDefaultOutName(args
[i
]));
692 } catch (Exception e
) {
693 System
.err
.println("error in opening out file:");
698 Calendar now
= Calendar
.getInstance();
700 long mili
= Calendar
.getInstance().getTimeInMillis()
701 - now
.getTimeInMillis();
702 System
.out
.println("conversion time:" + mili
+ " ms");
703 printMessageCounters();
706 System
.out
.println("file does not exist");
710 public static void main(String
[] args
) {
711 new mjc2wsl().run(args
);
Svarog.pmf.uns.ac.rs/gitweb
maintanance
Doni Pracner