This repository has been archived by the owner on Oct 2, 2023. It is now read-only.
-
Notifications
You must be signed in to change notification settings - Fork 14
/
Copy pathdecode.cpp
1775 lines (1440 loc) · 49.8 KB
/
decode.cpp
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
/*
isDcc
(c) 1998 Andrew de Quincey
See README.TXT for copying/distribution/modification details.
*/
#include <string.h>
#include <stdio.h>
#include <io.h>
#include "common.h"
#include "decodeOps.h"
#include "decodetable.h"
#include "util.h"
static int labelCounter;
static int instructionCounter;
int argnum = 0;
static void addCodeLine(ISData* isData, int inCounter, CodeLine* codeLine);
static int parseArg(int fd, Parameter* param, ISData* isData, int inCounter, int updateUsage);
static int parseOther(int fd, void* buffer);
static int parseComparison(int comparison);
static void decodePass0(int fd, ISData* isData);
static void decodePass1(ISData* isData);
static void decodePass2(ISData* isData);
void initDecode(void)
{
int i;
int pos;
// get memory & wipe decodeTable
decodeTable = (DecodeEntry**) mallocX(sizeof(DecodeEntry*)*DECODETABLESIZE);
for(i =0; i < DECODETABLESIZE; i++)
decodeTable[i] = NULL;
for(i=0; i< rawDecodeTableSize; i++)
{
// check op isn't out of range
if ((pos = (int) rawDecodeTable[i][0]) > DECODETABLESIZE)
error("\n!!!!Decode table entry out of range! (%i >= %i)\n", pos, DECODETABLESIZE);
// check we don't have duplicates
if (decodeTable[pos] != NULL)
error("Duplicate entries for opcode (0x%x) in decode table!\n", pos);
// make new memspace for entry
decodeTable[pos] = (DecodeEntry*) malloc(sizeof(DecodeEntry));
// add in the useful stuff
decodeTable[pos]->text = (char*) rawDecodeTable[i][1];
decodeTable[pos]->info.numParams = (int) rawDecodeTable[i][2];
decodeTable[pos]->decodeFunction0 = (decodeFunc) rawDecodeTable[i][3];
}
/*
for(i=0; i< DECODETABLESIZE; i++)
{
if (decodeTable[i])
continue;
printf("%x\n", i);
}
exit(1);
*/
// zero the label & instruction counters
// it seems labels do after all start with 1 (at least in version 5)
labelCounter=1; //version2.1
instructionCounter=0;
}
void decode(int fd, ISData* isData)
{
// pass 0 - read the code in from the file
decodePass0(fd, isData);
// pass 1 - work out function prototype/body pairings & fix local variable counts
// The problem is that the order in which the function bodies appear in the
// .ins file does not correspond to the function numbering (1,2,..). A connection
// between function prototypes (headers) and bodies can only be made, because
// each function has also a label associated with it (in the function call i.e.
// function102() ) and I know in which body this label is.
decodePass1(isData);
// pass 2 - fix local/parameter variable indicators
decodePass2(isData);
}
// pass 1 - work out function prototype/body pairings, fix local variable counts,
static void decodePass1(ISData* isData)
{
int i;
int j;
int fn;
// do the main body of the code
for(i=0; i< isData->codeLinesCount; i++)
{
// ah ha! a function call. we can update
if ((isData->codeLines[i]->type == FUNCTION) &&
(isData->codeLines[i]->functionNumber >= 0) &&
(isData->functionPrototypes[isData->codeLines[i]->functionNumber]->type == FUNCTION_USER))
{
// get the function number
fn = isData->codeLines[i]->functionNumber;
// skip if we've already done this one
if (isData->functionPrototypes[fn]->functionBody != NULL) continue;
// check we've not got an invalid function label (i.e. the label is
// present in the main code, NOT a function
if (isData->labels[isData->codeLines[i]->destLabel]->functionNumber == -1)
error("Invalid function label\n");
// update function body pointer
isData->functionPrototypes[fn]->functionBody =
isData->functionBodies[isData->labels[isData->codeLines[i]->destLabel]->functionNumber];
// update local string vars counts
isData->functionPrototypes[fn]->localParamSize = isData->functionPrototypes[fn]->functionBody->localParamSize;
}
}
// do the functions
for(i=0; i< isData->functionBodiesCount; i++)
{
for(j=0; j< isData->functionBodies[i]->codeLinesCount; j++)
{
// ah ha! a function call. we can update
if ((isData->functionBodies[i]->codeLines[j]->type == FUNCTION) &&
(isData->functionBodies[i]->codeLines[j]->functionNumber >= 0) &&
(isData->functionPrototypes[isData->functionBodies[i]->codeLines[j]->functionNumber]->type == FUNCTION_USER))
{
// get the function number
fn = isData->functionBodies[i]->codeLines[j]->functionNumber;
// skip if we've already done this one
if (isData->functionPrototypes[fn]->functionBody != NULL)
continue;
// update function body pointer
isData->functionPrototypes[fn]->functionBody =
isData->functionBodies[isData->labels[isData->functionBodies[i]->codeLines[j]->destLabel]->functionNumber];
isData->functionPrototypes[fn]->localParamSize =
isData->functionPrototypes[fn]->functionBody->localParamSize;
/*
// update local string vars counts
isData->functionPrototypes[fn]->localStringsCount =
isData->functionPrototypes[fn]->functionBody->localStringsCount -
isData->functionPrototypes[fn]->paramStringsCount;
isData->functionPrototypes[fn]->localStrings =
isData->functionPrototypes[fn]->functionBody->localStrings +
(sizeof(int) * isData->functionPrototypes[fn]->paramStringsCount);
// update local number vars counts
isData->functionPrototypes[fn]->localNumbersCount =
isData->functionPrototypes[fn]->functionBody->localNumbersCount -
isData->functionPrototypes[fn]->paramNumbersCount;
isData->functionPrototypes[fn]->localNumbers =
isData->functionPrototypes[fn]->functionBody->localNumbers +
(sizeof(int) * isData->functionPrototypes[fn]->paramNumbersCount); */
}
}
}
}
// pass 2 - fix local/parameter variable indicators
static void decodePass2(ISData* isData)
{
int i;
int j;
int k;
for(i=0; i< isData->functionPrototypesCount; i++)
{
// function not actually used
if (isData->functionPrototypes[i]->functionBody == NULL)
continue;
for(j=0; j< isData->functionPrototypes[i]->functionBody->codeLinesCount; j++)
{
for(k=0; k< isData->functionPrototypes[i]->functionBody->codeLines[j]->paramsCount; k++)
{
// printf("\t\tP%i\n", isData->functionPrototypes[i]->functionBody->codeLines[j]->paramsCount);
if (isData->functionPrototypes[i]->functionBody->codeLines[j]->params[k]->type == PARAM_FNLOCALSTRINGVARIABLE)
{
// this is actually a parameter variable
if (isData->functionPrototypes[i]->functionBody->codeLines[j]->params[k]->data.variableNumber <
isData->functionPrototypes[i]->paramStringsCount)
{
isData->functionPrototypes[i]->functionBody->codeLines[j]->params[k]->type = PARAM_FNPARAMSTRINGVARIABLE;
}
// actually a local variable
else
isData->functionPrototypes[i]->functionBody->codeLines[j]->params[k]->data.variableNumber -=
isData->functionPrototypes[i]->paramStringsCount;
}
if (isData->functionPrototypes[i]->functionBody->codeLines[j]->params[k]->type == PARAM_FNLOCALNUMBERVARIABLE)
{
// this is actually a parameter variable
if (isData->functionPrototypes[i]->functionBody->codeLines[j]->params[k]->data.variableNumber <
isData->functionPrototypes[i]->paramNumbersCount)
{
isData->functionPrototypes[i]->functionBody->codeLines[j]->params[k]->type = PARAM_FNPARAMNUMBERVARIABLE;
}
// actually a local variable
else
isData->functionPrototypes[i]->functionBody->codeLines[j]->params[k]->data.variableNumber -=
isData->functionPrototypes[i]->paramNumbersCount;
}
}
// fix the destination
if (isData->functionPrototypes[i]->functionBody->codeLines[j]->destination != NULL)
{
if (isData->functionPrototypes[i]->functionBody->codeLines[j]->destination->type == PARAM_FNLOCALSTRINGVARIABLE)
{
// this is actually a parameter variable
if (isData->functionPrototypes[i]->functionBody->codeLines[j]->destination->data.variableNumber <
isData->functionPrototypes[i]->paramStringsCount)
{
isData->functionPrototypes[i]->functionBody->codeLines[j]->destination->type = PARAM_FNPARAMSTRINGVARIABLE;
}
// actually a local variable
else
isData->functionPrototypes[i]->functionBody->codeLines[j]->destination->data.variableNumber -=
isData->functionPrototypes[i]->paramStringsCount;
}
if (isData->functionPrototypes[i]->functionBody->codeLines[j]->destination->type == PARAM_FNLOCALNUMBERVARIABLE)
{
// this is actually a parameter variable
if (isData->functionPrototypes[i]->functionBody->codeLines[j]->destination->data.variableNumber <
isData->functionPrototypes[i]->paramNumbersCount)
{
isData->functionPrototypes[i]->functionBody->codeLines[j]->destination->type = PARAM_FNPARAMNUMBERVARIABLE;
}
// actually a local variable
else
isData->functionPrototypes[i]->functionBody->codeLines[j]->destination->data.variableNumber -=
isData->functionPrototypes[i]->paramNumbersCount;
}
}
}
}
}
// pass 0 => decode stuff from the file
void decodePass0(int fd, ISData* isData)
{
int opcode;
int i,j;
int expectFunctionStart;
int curFunction,currFuncFileOffset;
int pos;
int last_label = 0;
// decode the functions/ subroutines
curFunction = 0;
while(1)
{
// need to check this as well, 'cos you don't always have an _EWQ section
// this needs to be checked FIRST, otherwise we'll interfere with opcode
// reading
pos = _tell(fd);
currFuncFileOffset = pos;
if (pos >= isData->eofPos)
{
isData->functionBodiesCount = curFunction;
return;
}
opcode = get2Byte(fd); //First 2bytes are some size.
// check for EOF (read next opcode, move back & check it's not 0x455f)
opcode = get2Byte(fd);
_lseek(fd, -2, 1);
// check we've not got too many functions
if (curFunction == isData->functionBodiesCount)
error("Too many functions found!\n");
// make up space for the codelines in this function
isData->functionBodies[curFunction] = (FunctionBody*) mallocX(sizeof(FunctionBody));
isData->functionBodies[curFunction]->codeLines = (CodeLine**) mallocX(sizeof(CodeLine*));
isData->functionBodies[curFunction]->codeLinesCount = 0;
isData->functionBodies[curFunction]->codeLinesMax = 1;
// zero instruction counter, so label offsets will be relative to the
// start of the function they are in
instructionCounter=0;
// printf("------------\n");
// right, process the code for real now
expectFunctionStart=1;
while(1)
{
// need to check this as well, 'cos you don't always have an _EWQ section
// this needs to be checked FIRST, otherwise we'll interfere with opcode
// reading
pos = _tell(fd);
if (pos >= isData->eofPos)
{
isData->functionBodiesCount = curFunction;
return;
}
for(i=last_label;i<isData->labelsCount;i++)
{
if ( isData->labels[i]->file_position == pos )
{
last_label = i+1;
opcode = get2Byte(fd);
}
if ( isData->labels[i]->file_position >= pos )
{
last_label = i;
break;
}
}
// get opcode
opcode = get2Byte(fd);
// hit a function start here? => end of function
if ((opcode == 0x0022) && (!expectFunctionStart))
{
_lseek(fd, -2, 1);
break;
}
// hit a function start here? => ignore it
if ((opcode == 0x0022) && expectFunctionStart)
{
for(j=0;j<isData->functionPrototypesCount;j++)
{
if ( isData->functionPrototypes[j]->label == currFuncFileOffset )
{
isData->functionPrototypes[j]->functionBody = isData->functionBodies[curFunction];
break;
}
}
expectFunctionStart=0;
}
// printf("%x -- %x\n", _tell(fd), opcode);
// check opcode in range & in table
if ((opcode > DECODETABLESIZE) || (opcode < 0))
error("\n!!!!Opcode out of range(0x%x) at (0x%x)\n", opcode, _tell(fd));
if (decodeTable[opcode] == NULL)
error("\n!!!!Unknown opcode (0x%x) at (0x%x)\n", opcode, _tell(fd));
// run the function if there is one
if (decodeTable[opcode]->decodeFunction0 != NULL)
(*decodeTable[opcode]->decodeFunction0)(fd, opcode, curFunction, isData);
if ( opcode == 0x0026 )
break;
}
// keep function indicator up to date
curFunction++;
pos = _tell(fd);
if ( pos >= isData->endCodeSegmentOffset )
break;
}
isData->functionBodiesCount = curFunction;
}
// ----------------------------------------------------------------------------
// function for parsing labels
static void label(int fd, int opcode, int inCounter, ISData* isData)
{
CodeLine* codeLine = (CodeLine*) mallocX(sizeof(CodeLine));
// setup start of structure
codeLine->type = LABEL;
codeLine->offset = _tell(fd)-2; //version2
codeLine->opcode = opcode;
codeLine->labelNumber = labelCounter;
codeLine->paramsCount =0;
codeLine->destination = NULL;
// record where this label is (relative to the main code, or the
// current function start, since instructionCounter is reset at the
// start of each new function
isData->labels[labelCounter]->position = instructionCounter;
isData->labels[labelCounter]->functionNumber = inCounter;
// just dump the no. of instructions to next label
get2Byte(fd);
// add it into the appropriate list of codelines
addCodeLine(isData, inCounter, codeLine);
// next instruction
instructionCounter++;
// move onto the next label
labelCounter++;
}
// ----------------------------------------------------------------------------
// function for equating things
static void equate(int fd, int opcode, int inCounter, ISData* isData)
{
int argType,nbArg;
CodeLine* codeLine = (CodeLine*) mallocX(sizeof(CodeLine));
// setup start of structure
codeLine->type = OPERATION;
codeLine->offset = _tell(fd)-2; //version2
codeLine->opcode = opcode;
codeLine->operationNumber = OP_EQUATE;
codeLine->paramsCount = 1;
codeLine->params = (Parameter**) mallocX(sizeof(Parameter*));
strcpy_s(codeLine->string, "=");
codeLine->destination = (Parameter*) mallocX(sizeof(Parameter));
nbArg = get2Byte(fd);
if ( nbArg == 1 )
{
codeLine->paramsCount = 0;
codeLine->destination->type = PARAM_SYSTEMNUMBERVARIABLE;
codeLine->destination->data.variableNumber = get2Byte(fd);
}
else
{
if ( nbArg != 2 ) //!! What is that?
{
codeLine->paramsCount = 0;
_lseek(fd,-2,1); //Skip that one.
return;
}
if ( nbArg != 2 )
error("\n!!!!Unexpected variable count type at (0x%x) in strCopy\n", _tell(fd));
// get the destination
switch(parseArg(fd, codeLine->destination, isData, inCounter, 1))
{
case PARAM_SYSTEMSTRINGVARIABLE:
case PARAM_USERSTRINGVARIABLE:
case PARAM_SYSTEMNUMBERVARIABLE:
case PARAM_USERNUMBERVARIABLE:
case PARAM_FNPARAMNUMBERVARIABLE:
case PARAM_FNLOCALNUMBERVARIABLE:
case PARAM_FNPARAMSTRINGVARIABLE:
case PARAM_FNLOCALSTRINGVARIABLE:
break;
default:
error("\n!!!!Unexpected variable type at (0x%x) in strCopy\n",
_tell(fd));
}
// printf("YY%i\n", isData->codeLines[0]->type);
// get the source
codeLine->params[0] = (Parameter*) mallocX(sizeof(Parameter));
switch(argType = parseArg(fd, codeLine->params[0], isData, inCounter, 1))
{
case PARAM_SYSTEMSTRINGVARIABLE:
case PARAM_USERSTRINGVARIABLE:
case PARAM_SYSTEMNUMBERVARIABLE:
case PARAM_USERNUMBERVARIABLE:
case PARAM_FNPARAMNUMBERVARIABLE:
case PARAM_FNLOCALNUMBERVARIABLE:
case PARAM_FNPARAMSTRINGVARIABLE:
case PARAM_FNLOCALSTRINGVARIABLE:
case PARAM_STRINGCONST:
case PARAM_LONGCONST:
break;
default:
printf("%i\n", argType);
error("\n!!!!Unexpected variable type at (0x%x) in strCopy\n",
_tell(fd));
}
}
// add it into the appropriate list of codelines
addCodeLine(isData, inCounter, codeLine);
// next instruction
instructionCounter++;
}
// ----------------------------------------------------------------------------
// function for an if statement
static void ifStmt(int fd, int opcode, int inCounter, ISData* isData)
{
char buffer[512];
int unknown;
int label;
CodeLine* codeLine = (CodeLine*) mallocX(sizeof(CodeLine));
// setup start of structure
codeLine->type = IFSTATEMENT;
codeLine->offset = _tell(fd)-2; //version2
codeLine->opcode = opcode;
codeLine->paramsCount = get2Byte(fd);
codeLine->params = (Parameter**) mallocX(sizeof(Parameter*) * 2);
codeLine->destination = NULL;
// get jump destination
if (parseOther(fd, (void*) buffer) != OTHER_LABEL)
error("\n!!!!Unexpected variable type at (0x%x) in ifStmt\n", _tell(fd));
// removed -1 since label0 can exist
label = *((int*) buffer);
codeLine->destLabel = label;
/*
// build up a cross reference list. version2.1
makeCrossRef(label, codeLine->offset, isData);
// update label's usage count
// removed -1 since label0 can exist
isData->labels[label]->usage++;
*/
// parse comparison
if ((codeLine->comparisonType = parseComparison(get1Byte(fd))) == OP_UNKNOWN)
error("\n!!!!Unknown comparison type at (0x%x) in compare\n", _tell(fd));
// get first operand
codeLine->params[0] = (Parameter*) mallocX(sizeof(Parameter));
switch(parseArg(fd, codeLine->params[0], isData, inCounter, 1))
{
case PARAM_LONGCONST:
case PARAM_USERNUMBERVARIABLE:
case PARAM_SYSTEMNUMBERVARIABLE:
case PARAM_FNPARAMNUMBERVARIABLE:
case PARAM_FNLOCALNUMBERVARIABLE:
break;
default:
error("\n!!!!Unexpected variable type at (0x%x) in ifStmt\n",
_tell(fd));
}
// get second operand
codeLine->params[1] = (Parameter*) mallocX(sizeof(Parameter));
switch(parseArg(fd, codeLine->params[1], isData, inCounter, 1))
{
case PARAM_LONGCONST:
case PARAM_USERNUMBERVARIABLE:
case PARAM_SYSTEMNUMBERVARIABLE:
case PARAM_FNPARAMNUMBERVARIABLE:
case PARAM_FNLOCALNUMBERVARIABLE:
break;
default:
error("\n!!!!Unexpected variable type at (0x%x) in ifStmt\n",
_tell(fd));
}
// add it into the appropriate list of codelines
addCodeLine(isData, inCounter, codeLine);
// next instruction
instructionCounter++;
}
// ----------------------------------------------------------------------------
// function for a comparison
static void comparison(int fd, int opcode, int inCounter, ISData* isData)
{
CodeLine* codeLine = (CodeLine*) mallocX(sizeof(CodeLine));
Parameter tmpParam;
// setup start of structure
codeLine->type = OPERATION;
codeLine->offset = _tell(fd)-2; //version2
codeLine->opcode = opcode;
codeLine->paramsCount = 2;
codeLine->params = (Parameter**) mallocX(sizeof(Parameter*) * 2);
// get the destination
codeLine->destination = (Parameter*) mallocX(sizeof(Parameter));
switch(parseArg(fd, codeLine->destination, isData, inCounter, 1))
{
case PARAM_SYSTEMNUMBERVARIABLE:
case PARAM_USERNUMBERVARIABLE:
case PARAM_FNPARAMNUMBERVARIABLE:
case PARAM_FNLOCALNUMBERVARIABLE:
break;
default:
error("\n!!!!Unexpected variable type at (0x%x) in strCopy\n",
_tell(fd));
}
// get first operand
codeLine->params[0] = (Parameter*) mallocX(sizeof(Parameter));
switch(parseArg(fd, codeLine->params[0], isData, inCounter, 1))
{
case PARAM_LONGCONST:
case PARAM_SYSTEMNUMBERVARIABLE:
case PARAM_USERNUMBERVARIABLE:
case PARAM_FNPARAMNUMBERVARIABLE:
case PARAM_FNLOCALNUMBERVARIABLE:
break;
default:
error("\n!!!!Unexpected variable type at (0x%x) in compare\n",
_tell(fd));
}
// get the comparison type
if (parseArg(fd, &tmpParam, isData, inCounter, 0) != PARAM_LONGCONST)
error("\n!!!!Unexpected variable type at (0x%x) in compare\n", _tell(fd));
if ((codeLine->operationNumber = parseComparison(tmpParam.data.intVal)) == OP_UNKNOWN)
error("\n!!!!Unknown comparison type at (0x%x) in compare\n", _tell(fd));
strcpy_s(codeLine->string, operations[codeLine->operationNumber]);
// get second operand
codeLine->params[1] = (Parameter*) mallocX(sizeof(Parameter));
switch(parseArg(fd, codeLine->params[1], isData, inCounter, 1))
{
case PARAM_LONGCONST:
case PARAM_SYSTEMNUMBERVARIABLE:
case PARAM_USERNUMBERVARIABLE:
case PARAM_FNPARAMNUMBERVARIABLE:
case PARAM_FNLOCALNUMBERVARIABLE:
break;
default:
error("\n!!!!Unexpected variable type at (0x%x) in compare\n",
_tell(fd));
}
// add it into the appropriate list of codelines
addCodeLine(isData, inCounter, codeLine);
// next instruction
instructionCounter++;
}
// ----------------------------------------------------------------------------
// function for a generic operation decode
static void decodeOp(int fd, int opcode, int inCounter, ISData* isData)
{
int arg,i,val;
CodeLine* codeLine = (CodeLine*) mallocX(sizeof(CodeLine));
// setup start of structure
codeLine->type = OPERATION;
codeLine->offset = _tell(fd)-2; //version2
codeLine->opcode = opcode;
codeLine->paramsCount = get2Byte(fd)-1;
codeLine->operationNumber = decodeTable[opcode]->info.operationNumber;
strcpy_s(codeLine->string, operations[decodeTable[opcode]->info.operationNumber]);
if ( codeLine->operationNumber == OP_POINTER )
{
_lseek(fd,-2,1);
codeLine->paramsCount = 1;
codeLine->destination = (Parameter*) mallocX(sizeof(Parameter));
codeLine->params = (Parameter**) mallocX(sizeof(Parameter*) *codeLine->paramsCount);
codeLine->params[0] = (Parameter*) mallocX(sizeof(Parameter));
codeLine->params[0]->data.intVal = get2Byte(fd);
codeLine->params[0]->type = PARAM_DATATYPENUM;
codeLine->params[0]->byref = 0;
arg = parseArg(fd, codeLine->destination, isData, inCounter, 1);
}
else if (( codeLine->operationNumber == OP_UNKNOWN )||
//( opcode == 0x2b)||
( opcode == 0x62)) // !!!
{
_lseek(fd,-2,1);
codeLine->paramsCount = 0;
codeLine->destination = 0;
}
else if ( ( opcode == 0x0004 && codeLine->paramsCount > 1 ) ||
( ((opcode >= 0x0007 && opcode < 0x0020) || (opcode == 0x2a) || (opcode == 0x2b)) && codeLine->paramsCount > 2 ))
{
_lseek(fd,-2,1);
codeLine->paramsCount = 0;
codeLine->destination = 0;
}
else
{
if ( opcode == 0x0004 && codeLine->paramsCount == 1 )
{
val = get2Byte(fd);
if ( val == 0 )
{
codeLine->paramsCount = 0;
codeLine->destination = (Parameter*) mallocX(sizeof(Parameter));
codeLine->destination->data.intVal = val;
codeLine->destination->type = PARAM_DATATYPENUM;
codeLine->destination->byref = 0;
goto output_line;
}
else
_lseek(fd,-2,1);
}
if ( codeLine->paramsCount > -1 )
{
// get the destination
codeLine->destination = (Parameter*) mallocX(sizeof(Parameter));
arg = parseArg(fd, codeLine->destination, isData, inCounter, 1);
codeLine->params = NULL;
if ( codeLine->paramsCount > 0 )
{
codeLine->params = (Parameter**) mallocX(sizeof(Parameter*) *codeLine->paramsCount);
for(i=0;i<codeLine->paramsCount;i++)
{
// get first operand
codeLine->params[i] = (Parameter*) mallocX(sizeof(Parameter));
arg = parseArg(fd, codeLine->params[i], isData, inCounter, 1);
}
}
}
else
{
codeLine->paramsCount = 0;
codeLine->destination = NULL;
codeLine->params = NULL;
}
}
output_line:
// add it into the appropriate list of codelines
addCodeLine(isData, inCounter, codeLine);
// next instruction
instructionCounter++;
}
// ----------------------------------------------------------------------------
// function for a single variable operation
static void singleVarOp(int fd, int opcode, int inCounter, ISData* isData)
{
CodeLine* codeLine = (CodeLine*) mallocX(sizeof(CodeLine));
// setup start of structure
codeLine->type = OPERATION;
codeLine->offset = _tell(fd)-2; //version2
codeLine->opcode = opcode;
codeLine->paramsCount = 2;
codeLine->params = (Parameter**) mallocX(sizeof(Parameter*)*2);
codeLine->operationNumber = decodeTable[opcode]->info.operationNumber;
strcpy_s(codeLine->string, operations[decodeTable[opcode]->info.operationNumber]);
// get the destination
codeLine->destination = (Parameter*) mallocX(sizeof(Parameter));
switch(parseArg(fd, codeLine->destination, isData, inCounter, 1))
{
case PARAM_SYSTEMNUMBERVARIABLE:
case PARAM_USERNUMBERVARIABLE:
case PARAM_FNPARAMNUMBERVARIABLE:
case PARAM_FNLOCALNUMBERVARIABLE:
break;
default:
error("\n!!!!Unexpected variable type at (0x%x) in strCopy\n",
_tell(fd));
}
// copy destination into 1st param
codeLine->params[0] = (Parameter*) mallocX(sizeof(Parameter));
memcpy(codeLine->params[0], codeLine->destination, sizeof(Parameter));
// get operand
codeLine->params[1] = (Parameter*) mallocX(sizeof(Parameter));
switch(parseArg(fd, codeLine->params[1], isData, inCounter, 1))
{
case PARAM_LONGCONST:
case PARAM_SYSTEMNUMBERVARIABLE:
case PARAM_USERNUMBERVARIABLE:
case PARAM_FNPARAMNUMBERVARIABLE:
case PARAM_FNLOCALNUMBERVARIABLE:
break;
default:
error("\n!!!!Unexpected variable type at (0x%x) in compare\n",
_tell(fd));
}
// add it into the appropriate list of codelines
addCodeLine(isData, inCounter, codeLine);
// next instruction
instructionCounter++;
}
// ----------------------------------------------------------------------------
// function for a NOT operation
static void notOp(int fd, int opcode, int inCounter, ISData* isData)
{
char buffer[512];
CodeLine* codeLine = (CodeLine*) mallocX(sizeof(CodeLine));
// setup start of structure
codeLine->type = OPERATION;
codeLine->offset = _tell(fd)-2; //version2
codeLine->opcode = opcode;
codeLine->paramsCount = 1;
codeLine->params = (Parameter**) mallocX(sizeof(Parameter*));
codeLine->operationNumber = decodeTable[opcode]->info.operationNumber;
strcpy_s(codeLine->string, operations[decodeTable[opcode]->info.operationNumber]);
// get the destination
codeLine->destination = (Parameter*) mallocX(sizeof(Parameter));
switch(parseArg(fd, codeLine->destination, isData, inCounter, 1))
{
case PARAM_SYSTEMNUMBERVARIABLE:
case PARAM_USERNUMBERVARIABLE:
case PARAM_FNPARAMNUMBERVARIABLE:
case PARAM_FNLOCALNUMBERVARIABLE:
break;
default:
error("\n!!!!Unexpected variable type at (0x%x) in strCopy\n",
_tell(fd));
}
// ignore this. it is a copy of the other operand
// (it seems to put this in, even though BIT NOT takes only one operand!)
parseArg(fd, (Parameter*) buffer, isData, inCounter, 0);
// get operand
codeLine->params[0] = (Parameter*) mallocX(sizeof(Parameter));
switch(parseArg(fd, codeLine->params[0], isData, inCounter, 1))
{
case PARAM_LONGCONST:
case PARAM_SYSTEMNUMBERVARIABLE:
case PARAM_USERNUMBERVARIABLE:
case PARAM_FNPARAMNUMBERVARIABLE:
case PARAM_FNLOCALNUMBERVARIABLE:
break;
default:
error("\n!!!!Unexpected variable type at (0x%x) in compare\n",
_tell(fd));
}
// add it into the appropriate list of codelines
addCodeLine(isData, inCounter, codeLine);
// next instruction
instructionCounter++;
}
// ----------------------------------------------------------------------------
// function for the AskOptions(...) dialogue
static void askOptions(int fd, int opcode, int inCounter, ISData* isData)
{
int numPairs;
char buffer[512];
int argType;
int count;
CodeLine* codeLine = (CodeLine*) mallocX(sizeof(CodeLine));
// setup start of structure
codeLine->type = FUNCTION;
codeLine->offset = _tell(fd)-2; //version2
codeLine->opcode = opcode;
codeLine->functionNumber = -1;
codeLine->destination = NULL;
// copy function's name into it
codeLine->name = (char*) mallocX(strlen(decodeTable[opcode]->text)+1);
strcpy_s(codeLine->name, strlen(decodeTable[opcode]->text) + 1, decodeTable[opcode]->text);
// get the number of pairs
if ((argType = parseOther(fd, (void*) buffer)) != OTHER_NUMPARAMS)
error("\n!!!!Unexpected variable type at (0x%x) in askOptions\n",
_tell(fd));
numPairs = *((int*) buffer);
codeLine->params = (Parameter**) mallocX(sizeof(Parameter*) * (2 + (numPairs * 2)));
codeLine->paramsCount = 2 + (numPairs * 2);
// first two args definitely there
// get first operand
codeLine->params[0] = (Parameter*) mallocX(sizeof(Parameter));
switch(parseArg(fd, codeLine->params[0], isData, inCounter, 1))
{
case PARAM_LONGCONST:
case PARAM_SYSTEMNUMBERVARIABLE:
case PARAM_USERNUMBERVARIABLE:
case PARAM_FNPARAMNUMBERVARIABLE:
case PARAM_FNLOCALNUMBERVARIABLE:
break;
default:
error("\n!!!!Unexpected variable type at (0x%x) in compare\n",
_tell(fd));
}
// get second operand (string)
codeLine->params[1] = (Parameter*) mallocX(sizeof(Parameter));
switch(parseArg(fd, codeLine->params[1], isData, inCounter, 1))
{
case PARAM_STRINGCONST:
case PARAM_SYSTEMSTRINGVARIABLE:
case PARAM_USERSTRINGVARIABLE:
case PARAM_FNPARAMSTRINGVARIABLE:
case PARAM_FNLOCALSTRINGVARIABLE:
break;
default:
error("\n!!!!Unexpected variable type at (0x%x) in compare\n",
_tell(fd));
}
// extract (variable number of) args
for(count =0; count < numPairs; count++)
{
// get first operand (string)
codeLine->params[2+(count*2)] = (Parameter*) mallocX(sizeof(Parameter));
switch(parseArg(fd, codeLine->params[2 + (count*2)], isData, inCounter, 1))
{
case PARAM_STRINGCONST:
case PARAM_SYSTEMSTRINGVARIABLE:
case PARAM_USERSTRINGVARIABLE:
case PARAM_FNPARAMSTRINGVARIABLE:
case PARAM_FNLOCALSTRINGVARIABLE:
break;
default:
error("\n!!!!Unexpected variable type at (0x%x) in compare\n",
_tell(fd));
}
// get second operand (number)
codeLine->params[2+1+(count*2)] = (Parameter*) mallocX(sizeof(Parameter));
switch(parseArg(fd, codeLine->params[2 + 1 +(count*2)], isData, inCounter, 1))
{
case PARAM_LONGCONST:
case PARAM_SYSTEMNUMBERVARIABLE:
case PARAM_USERNUMBERVARIABLE:
case PARAM_FNPARAMNUMBERVARIABLE:
case PARAM_FNLOCALNUMBERVARIABLE:
break;
default:
error("\n!!!!Unexpected variable type at (0x%x) in compare\n",
_tell(fd));
}
}
// add it into the appropriate list of codelines
addCodeLine(isData, inCounter, codeLine);
// next instruction
instructionCounter++;
}
// ----------------------------------------------------------------------------