-
Notifications
You must be signed in to change notification settings - Fork 0
/
AWK.PAS
516 lines (491 loc) · 11.9 KB
/
AWK.PAS
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
{ @author: Sylvain Maltais ([email protected])
@created: 2022
@website(https://www.gladir.com/xenix-0)
@abstract(Target: Free Pascal, Turbo Pascal)
}
Program AWK;
Const
TokenList:Array[0..69]of String[20]=(
'BEGIN','BEGINFILE','END','ENDFILE','and','asort','asorti','atan2',
'bindtextdomain','break','case','close','compl','continue','cos',
'dcgettext','dcngettext','default','delete','do','else','eval',
'exit','exp','fflush','for','func','function','gensub','getline',
'gsub','if','in','include','index','int','isarray','length',
'load','log','lshift','match','mktime','namespace','next',
'nextfile','or','patsplit','print','printf','rand','return',
'rshift','sin','split','sprintf','sqrt','srand','strftime',
'strtonum','sub','substr','switch','system','systime','tolower',
'toupper','typeof','while','xor'
);
MaxLine=1024;
Type
StrPointer=^String;
Var
FileAWK:Text;
Mode:(_None,_F);
Terminated:Boolean;
CurrCommand:String;
FileName,CurrLine:String;
CurrPos:Byte;
PA:Array[1..MaxLine] of StrPointer;
CurrLinePtr,NumberLine:Integer;
CurrNumberLine:Integer;
I:Integer;
Function LTrim(S:String):String;
Var
I:Integer;
Begin
I:=1;
While(I<=Length(s)) and (S[I] in [#9,' ']) do Inc(I);
Delete(S,1,I-1);
LTrim:=S;
End;
Function PadRight(S:String;Space:Byte):String;
Var
I:Byte;
Begin
If Length(S)<Space Then For I:=Length(S)+1 to Space do S:=S+' ';
PadRight:=S;
End;
Function StrToUpper(S:String):String;
Var
I:Byte;
Begin
For I:=1 to Length(S)do Begin
If S[I] in['a'..'z']Then S[I]:=Chr(Ord(S[I])-32);
End;
StrToUpper:=S;
End;
{ Traitement de la liste }
Function AddLine(S:String):Boolean;
Var
P:StrPointer;
Begin
If NumberLine>=MaxLine Then Begin
AddLine:=False;
Exit;
End;
Inc(NumberLine);
GetMem(P,Length(S)+1);
P^:=S;
PA[NumberLine]:=P;
AddLine:=True;
End;
Function ExtractCommand:Byte;
Var
I:Byte;
Begin
ExtractCommand:=255;
CurrCommand:='';
For I:=CurrPos to Length(CurrLine)do Begin
If Not(CurrLine[I]in['A'..'Z','a'..'z','$'])Then Begin
CurrCommand:=Copy(CurrLine,CurrPos,I-CurrPos);
CurrPos:=I;
Break;
End;
End;
If CurrCommand=''Then Begin
CurrCommand:=Copy(CurrLine,CurrPos,255);
CurrPos:=Length(CurrLine)+1;
End;
For I:=Low(TokenList)to High(TokenList)do Begin
If CurrCommand=TokenList[I]Then Begin
ExtractCommand:=I;
Exit;
End;
End;
End;
{ Evaluation d'expression (Infix to PostFix ) }
Var
Stack:Array[0..100]of Char;
TopOfStack:Byte;
resultStack:Array[0..100]of Real;
TopOfStackInt:Byte;
Procedure StackPushChar(C:Char);Begin
If TopOfStack>=High(Stack)Then Begin
WriteLn('Pile pleine!');
Halt;
End
Else
Begin
Stack[TopOfStack]:=C;
Inc(TopOfStack);
End;
End;
Function StackPop:String;
Var
S:String;
Err:Word;
Begin
Dec(TopOfStack);
If TopOfStack<1Then Begin
WriteLn('Pile vide');
Halt;
End
Else
StackPop:=Stack[TopOfStack];
End;
Function StackPeek:Char;Begin
StackPeek:=Stack[TopOfStack-1];
End;
Procedure ResultStackPush(C:Real);Begin
If TopOfStackInt>=High(ResultStack)Then Begin
WriteLn('Pile pleine!');
Halt;
End
Else
Begin
ResultStack[TopOfStackInt]:=C;
Inc(TopOfStackInt);
End;
End;
Function ResultStackPop:Real;Begin
Dec(TopOfStackInt);
If TopOfStackInt<1Then Begin
WriteLn('Pile vide');
Halt;
End
Else
ResultStackPop:=ResultStack[TopOfStackInt];
End;
Function GetNumberValue:Real;
Var
I:Byte;
Top,P_2:Char;
AppendOk:Boolean;
_Result,P,P2:Real;
Err:Word;
PostFix:String;
Value:String;
Exposant:Boolean;
StopChar:Set Of Char;
Infix:String;
Begin
StopChar:=[',',':',';','"','<','=','>'];
TopOfStack:=1;
TopOfStackInt:=1;
PostFix:='';
Infix:=CurrLine;
I:=CurrPos;
If Infix[CurrPos]='-'Then Begin
Insert('(0)',Infix,CurrPos);
Dec(CurrPos,3);
End;
Repeat
If Infix[I]in['0'..'9']Then Begin
Value:='';
Exposant:=False;
Repeat
If Infix[I]in['E','e']Then Begin
Exposant:=True;
Value:=Value+Infix[I];
Inc(I);
End
Else
If(Exposant)and(Infix[I]in['-','+'])Then Begin
Value:=Value+Infix[I];
Inc(I);
End
Else
If Infix[I]in['0'..'9','.']Then Begin
Value:=Value+Infix[I];
Inc(I);
End
Else
Break;
Until I>Length(Infix);
PostFix:=PostFix+'('+Value+')';
End
Else If Infix[I]='('Then Begin
StackPushChar(Infix[I]);
Inc(I);
End
Else If Infix[I]in['*','+','-','/']Then Begin
While(TopOfStack>1)and(StackPeek <> '(')do Begin
Top:=StackPeek;
P_2:=Infix[I];
AppendOk:=True;
If(Top='+')and(P_2='*')Then AppendOk:=False
Else If(Top='*')and(P_2='-')Then AppendOk:=True
Else If(Top='+')and(P_2='-')Then AppendOk:=True;
If(AppendOk)Then PostFix:=PostFix+StackPop
Else Break;
End;
StackPushChar(Infix[I]);
Inc(I);
End
Else If Infix[I]=')'Then Begin
While(TopOfStack>1)and(StackPeek<>'(')do PostFix:=PostFix+StackPop;
If TopOfStack>1Then StackPop;
Inc(I);
End
Else
Inc(I);
If(Infix[I]in StopChar)Then Break;
If StrToUpper(Copy(Infix,I,4))='THEN'Then Break;
Until I>Length(Infix);
CurrPos:=I;
While(TopOfStack>1)do PostFix:=PostFix+StackPop;
{ Transformation en POSTFIX }
I:=1;
Repeat
If PostFix[I]in['*','+','-',' ']Then Begin
P:=ResultStackPop;
P2:=ResultStackPop;
Case PostFix[I]of
'+':_Result:=P2+P;
'-':_Result:=P2-P;
'*':_Result:=P2*P;
'/':_Result:=P2/P;
Else _Result:=-1;
End;
ResultStackPush(_Result);
End
Else
Begin
Value:='';
Exposant:=False;
Repeat
If Postfix[I]in['0'..'9','.']Then Begin
Value:=Value+Postfix[I];
Inc(I);
End
Else
If(Value<>'')and(Postfix[I]in['E','e'])Then Begin
Exposant:=True;
Value:=Value+Postfix[I];
Inc(I);
End
Else
If(Value<>'')and(Exposant)and(Postfix[I]in['+','-'])Then Begin
Value:=Value+Postfix[I];
Inc(I);
End
Else
Break;
Until I>Length(Postfix);
If Value<>''Then Begin
Val(Value,_Result,Err);
ResultStackPush(_Result);
End;
End;
Inc(I);
Until I>Length(Postfix);
GetNumberValue:=ResultStackPop;
End;
Procedure SkipSpace;Begin
While(CurrLine[CurrPos]in[' '])and(CurrPos<Length(CurrLine))do Inc(CurrPos);
End;
Function GetSeparator:Char;Begin
If CurrPos>Length(CurrLine)Then Begin
GetSeparator:=#0;
Exit;
End;
SkipSpace;
GetSeparator:=CurrLine[CurrPos];
End;
Function GetStringValue:String;
Var
S:String;
Begin
GetStringValue:='';
S:='';
If CurrLine[CurrPos]='"'Then Begin
Inc(CurrPos);
While(CurrLine[CurrPos]<>'"')and(CurrPos<=Length(CurrLine))do Begin
S:=S+CurrLine[CurrPos];
Inc(CurrPos);
End;
If CurrLine[CurrPos]='"'Then Inc(CurrPos);
GetStringValue:=S;
End;
End;
Procedure BeginCommand;Begin
End;
Procedure PrintCommand;
Var
R:Real;
Begin
If GetSeparator='"'Then Begin
WriteLn(GetStringValue);
End
Else
Begin
R:=GetNumberValue;
If Frac(R)=0.0Then WriteLn(R:0:0)
Else WriteLn(R);
End;
End;
Function RunLine:Boolean;
Var
UnknownCommand:Boolean;
NoImplementation:Boolean;
J,Err:Integer;
Begin
RunLine:=False;
Repeat
If CurrLine[CurrPos]='#'Then Begin
CurrPos:=Length(CurrLine);
RunLine:=True;
Exit;
End;
NoImplementation:=False;
UnknownCommand:=False;
Case ExtractCommand of
0: BeginCommand;{BEGIN}
1: NoImplementation:=True; {BEGINFILE}
2: NoImplementation:=True; { END }
3: NoImplementation:=True; {ENDFILE}
4: NoImplementation:=True; { and }
5: NoImplementation:=True; { asort }
6: NoImplementation:=True; { asorti }
7: NoImplementation:=True; { atan2 }
8: NoImplementation:=True; { bindtextdomain }
9: NoImplementation:=True; { break }
10: NoImplementation:=True; { case }
11: NoImplementation:=True; { close }
12: NoImplementation:=True; { compl }
13: NoImplementation:=True; { continue }
14: NoImplementation:=True; { cos }
15: NoImplementation:=True; { dcgettext }
16: NoImplementation:=True; { dcngettext }
17: NoImplementation:=True; { default }
18: NoImplementation:=True; { delete }
19: NoImplementation:=True; { do }
20: NoImplementation:=True; { else }
21: NoImplementation:=True; { eval }
22:Begin
Terminated:=True;
Exit;
End;{ exit }
23: NoImplementation:=True; { exp }
24: NoImplementation:=True; { fflush }
25: NoImplementation:=True; { for }
26: NoImplementation:=True; { func }
27: NoImplementation:=True; { function }
28: NoImplementation:=True; { gensub }
29: NoImplementation:=True; { getline }
30: NoImplementation:=True; { gsub }
31: NoImplementation:=True; { if }
32: NoImplementation:=True; { in }
33: NoImplementation:=True; { include }
34: NoImplementation:=True; { index }
35: NoImplementation:=True; { int }
36: NoImplementation:=True; { isarray }
37: NoImplementation:=True; { length }
38: NoImplementation:=True; { load }
39: NoImplementation:=True; { log }
40: NoImplementation:=True; { lshift }
41: NoImplementation:=True; { match }
42: NoImplementation:=True; { mktime }
43: NoImplementation:=True; { namespace }
44: NoImplementation:=True; { next }
45: NoImplementation:=True; { nextfile }
46: NoImplementation:=True; { or }
47: NoImplementation:=True; { patsplit }
48: PrintCommand; { print }
49: NoImplementation:=True; { printf }
50: NoImplementation:=True; { rand }
51: NoImplementation:=True; { return }
52: NoImplementation:=True; { rshift }
53: NoImplementation:=True; { sin }
54: NoImplementation:=True; { split }
55: NoImplementation:=True; { sprintf }
56: NoImplementation:=True; { sqrt }
57: NoImplementation:=True; { srand }
58: NoImplementation:=True; { strftime }
59: NoImplementation:=True; { strtonum }
60: NoImplementation:=True; { sub }
61: NoImplementation:=True; { substr }
62: NoImplementation:=True; { switch }
63: NoImplementation:=True; { system }
64: NoImplementation:=True; { systime }
65: NoImplementation:=True; { tolower }
66: NoImplementation:=True; { toupper }
67: NoImplementation:=True; { typeof }
68: NoImplementation:=True; { while }
69: NoImplementation:=True; { xor }
Else UnknownCommand:=True;
End;
If(UnknownCommand)Then Begin
WriteLn('Commande non reconnu a la position ',CurrPos,' de la ligne ',CurrNumberLine+1);
Exit;
End;
If(NoImplementation)Then Begin
WriteLn('La commande ',CurrCommand,' n''a pas ete implemente');
Exit;
End;
While(CurrLine[CurrPos]in[' ',';'])and(CurrPos<=Length(CurrLine)) do Inc(CurrPos);
If CurrPos>=Length(CurrLine)Then Break;
If Not(CurrLine[CurrPos]in['A'..'Z','a'..'z','_'])Then Begin
WriteLn('Erreur de syntaxe a la position ',CurrPos,' de la ligne ',CurrNumberLine+1);
Exit;
End;
Until CurrPos>Length(CurrLine);
RunLine:=True;
End;
Procedure RunProgram;
Var
J:Integer;
Err:Integer;
Begin
If NumberLine>0Then Begin
CurrLinePtr:=1;
While(CurrLinePtr<=NumberLine) do Begin
CurrLine:=PA[CurrLinePtr]^;
CurrNumberLine:=0;
J:=1;
While(J<Length(CurrLine))do Begin
If Not(CurrLine[J]in['0'..'9'])Then Begin
Val(Copy(CurrLine,1,J-1),CurrNumberLine,Err);
Break;
End;
Inc(J);
End;
While J<=Length(CurrLine)do Begin
If CurrLine[J]in[' ',#9]Then Inc(J)
Else Break;
End;
CurrPos:=J;
If Not RunLine Then Break;
Inc(CurrLinePtr);
End;
End;
End;
BEGIN
If(ParamStr(1)='/?')or(ParamStr(1)='--help')or(ParamStr(1)='-h')Then Begin
WriteLn('AWK : Cette commande permet de lancer le langage de programmation AWK.');
WriteLn;
WriteLn('Syntaxe : AWK [-f nomfichier]');
End
Else
If ParamCount>1Then Begin
NumberLine:=0;CurrNumberLine:=0;
Mode:=_None;FileName:='';
For I:=1 to ParamCount do Begin
If Mode=_F Then Begin
FileName:=ParamStr(I);
Mode:=_None;
End
Else
If ParamStr(I)='-f'Then Mode:=_F;
End;
If FileName<>''Then Begin
{$I-}Assign(FileAWK,FileName);
Reset(FileAWK);{$I+}
If IoResult<>0Then Begin
WriteLn('Fichier introuvable');
Exit;
End;
While Not EOF(FileAWK) do Begin
ReadLn(FileAWK,CurrLine);
If Not AddLine(CurrLine)Then Begin
WriteLn('Manque de mmoire');
Break;
End;
End;
Close(FileAWK);
RunProgram;
End;
End;
END.