428 lines
15 KiB
OpenEdge ABL
428 lines
15 KiB
OpenEdge ABL
(*$R-,L-*)
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PROGRAM INDENT(SOURCE, INPUT, OUTPUT);
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CONST
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SMALLINDENT=2; MIDINDENT=2; LARGEINDENT=4;
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TYPE
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STATETYPE =
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(OPENER, MIDDLER, CLOSER, PRAGMENT, DOER, QUOTE, COLON, GO, STROP, OTHER);
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CLAUSETYPE =
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(BRIEF, CONDCL, CASECL, CLOSEDCL, LOOPCL, INDEXER, ROUTINE, JUMP,
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EXIT, SEMICOMMA, STRING, HASH, CO, COMMENT, PR, PRAGMAT, UPPER, POINT, ANY);
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TREEP=^TREE;
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TREE=RECORD
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(*TREE TO HOLD RESERVED WORD DICTIONARY*)
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C: CHAR;
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LEFT, RIGHT, NEXT: TREEP;
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TIP: BOOLEAN;
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ST: STATETYPE; CL: CLAUSETYPE;
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END;
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STACKP=^STACK;
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STACK=PACKED RECORD
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C: CLAUSETYPE; G: BOOLEAN;
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NEXT: STACKP
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END;
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ALFA=PACKED ARRAY [1..10] OF CHAR;
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VAR
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SOURCE: TEXT;
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ROOT: TREEP;
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TOS: STACKP;
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VETTEDCHARACTER: RECORD
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WORD: PACKED ARRAY [1..80] OF CHAR; (*THE LONGEST CONCEIVABLE BOLDWORD!*)
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INDEX: 0..80;
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END;
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STARTOFLINE,
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LINENUMBERS: BOOLEAN; (*TRUE IFF THE SOURCE TEXT INCLUDES LINE NUMBERS*)
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I: INTEGER;
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INDENT, (*EXPECTED INDENT FOR SUBSEQUENT LINES*)
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TEMPINDENT: INTEGER; (*INDENT FOR CURRENT LINE*)
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INSTRAGMENT: BOOLEAN;
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STROPSTATE: (INPOINT, INUPPER, INPRAGP, INPRAGUP);
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GONEON: BOOLEAN; (*TRUE IFF THE LAST TOKEN WAS AN OPENER OR A MIDDLER*)
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(**)
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(**)
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(**)
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PROCEDURE SETUPTREE;
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(*TO CREATE THE DICTIONARY*)
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PROCEDURE INSERT(WORD: ALFA; S: STATETYPE; B: CLAUSETYPE);
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VAR TREEPTR: TREEP; INDEX: INTEGER; FOUND: BOOLEAN;
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BEGIN TREEPTR := ROOT; INDEX := 1;
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WHILE WORD[INDEX]<>' ' DO
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BEGIN
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WITH TREEPTR^ DO
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BEGIN
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IF TREEPTR^.NEXT=NIL THEN
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BEGIN NEW(NEXT); WITH NEXT^ DO
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BEGIN C := WORD[INDEX];
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LEFT := NIL; RIGHT := NIL; TIP := FALSE; NEXT := NIL
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END
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END;
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TREEPTR := NEXT
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END;
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FOUND := FALSE;
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WHILE NOT FOUND DO WITH TREEPTR^ DO
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IF WORD[INDEX]<C THEN
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BEGIN
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IF LEFT=NIL THEN
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BEGIN NEW(LEFT); WITH LEFT^ DO
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BEGIN C := WORD[INDEX];
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LEFT := NIL; RIGHT := NIL; TIP := FALSE; NEXT := NIL
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END;
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FOUND := TRUE
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END;
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TREEPTR := LEFT
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END
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ELSE IF WORD[INDEX]>C THEN
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BEGIN
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IF RIGHT=NIL THEN
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BEGIN NEW(RIGHT); WITH RIGHT^ DO
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BEGIN C := WORD[INDEX];
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LEFT := NIL; RIGHT := NIL; TIP := FALSE; NEXT := NIL
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END;
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FOUND := TRUE
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END;
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TREEPTR := RIGHT
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END
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ELSE FOUND := TRUE;
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INDEX := INDEX+1
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END;
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WITH TREEPTR^ DO
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BEGIN TIP := TRUE; ST := S; CL := B END
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END (*INSERT*);
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(**)
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BEGIN (*SETUPTREE*)
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NEW(ROOT); ROOT^.NEXT := NIL;
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INSERT('( ', OPENER , BRIEF );
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INSERT('IF ', OPENER , CONDCL );
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INSERT('if ', OPENER , CONDCL );
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INSERT('CASE ', OPENER , CASECL );
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INSERT('case ', OPENER , CASECL );
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INSERT('BEGIN ', OPENER , CLOSEDCL );
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INSERT('begin ', OPENER , CLOSEDCL );
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INSERT('[ ', OPENER , INDEXER );
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INSERT('! ', MIDDLER , BRIEF );
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INSERT('THEN ', MIDDLER , CONDCL );
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INSERT('then ', MIDDLER , CONDCL );
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INSERT('IN ', MIDDLER , CASECL );
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INSERT('in ', MIDDLER , CASECL );
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INSERT('ELIF ', MIDDLER , CONDCL );
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INSERT('elif ', MIDDLER , CONDCL );
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INSERT('ELSE ', MIDDLER , CONDCL );
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INSERT('else ', MIDDLER , CONDCL );
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INSERT('OUSE ', MIDDLER , CASECL );
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INSERT('ouse ', MIDDLER , CASECL );
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INSERT('OUT ', MIDDLER , CASECL );
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INSERT('out ', MIDDLER , CASECL );
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INSERT('EXIT ', MIDDLER , EXIT );
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INSERT('exit ', MIDDLER , EXIT );
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INSERT('; ', MIDDLER , SEMICOMMA);
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INSERT(', ', MIDDLER , SEMICOMMA);
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INSERT(') ', CLOSER , BRIEF );
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INSERT('FI ', CLOSER , CONDCL );
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INSERT('fi ', CLOSER , CONDCL );
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INSERT('ESAC ', CLOSER , CASECL );
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INSERT('esac ', CLOSER , CASECL );
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INSERT('END ', CLOSER , CLOSEDCL );
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INSERT('end ', CLOSER , CLOSEDCL );
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INSERT('] ', CLOSER , INDEXER );
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INSERT('# ', PRAGMENT, HASH );
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INSERT('CO ', PRAGMENT, CO );
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INSERT('co ', PRAGMENT, CO );
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INSERT('COMMENT ', PRAGMENT, COMMENT );
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INSERT('comment ', PRAGMENT, COMMENT );
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INSERT('PR ', PRAGMENT, PR );
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INSERT('pr ', PRAGMENT, PR );
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INSERT('PRAGMAT ', PRAGMENT, PRAGMAT );
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INSERT('pragmat ', PRAGMENT, PRAGMAT );
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INSERT('FOR ', DOER , LOOPCL );
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INSERT('for ', DOER , LOOPCL );
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INSERT('FROM ', DOER , LOOPCL );
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INSERT('from ', DOER , LOOPCL );
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INSERT('BY ', DOER , LOOPCL );
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INSERT('by ', DOER , LOOPCL );
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INSERT('TO ', DOER , LOOPCL );
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INSERT('to ', DOER , LOOPCL );
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INSERT('WHILE ', DOER , LOOPCL );
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INSERT('while ', DOER , LOOPCL );
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INSERT('DO ', DOER , LOOPCL );
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INSERT('do ', DOER , LOOPCL );
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INSERT('OD ', CLOSER , LOOPCL );
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INSERT('od ', CLOSER , LOOPCL );
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INSERT('GO ', GO , JUMP );
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INSERT('go ', GO , JUMP );
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INSERT('" ', QUOTE , STRING );
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INSERT('UPPER ', STROP , UPPER );
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INSERT('upper ', STROP , UPPER );
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INSERT('POINT ', STROP , POINT );
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INSERT('point ', STROP , POINT );
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(*':' AFTER BOLD , COLON , ROUTINE ); *)
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END;
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(**)
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(**)
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PROCEDURE PUSH(CL: CLAUSETYPE);
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VAR TEMP: STACKP;
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BEGIN TEMP := TOS; NEW(TOS); WITH TOS^ DO
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BEGIN C := CL; G := GONEON; NEXT := TEMP END
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END;
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(**)
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(**)
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PROCEDURE POP;
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VAR TEMP: STACKP;
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BEGIN
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IF NOT GONEON AND NOT INSTRAGMENT THEN INDENT := INDENT-MIDINDENT;
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TEMP := TOS; GONEON := TOS^.G; TOS := TOS^.NEXT; DISPOSE(TEMP)
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END;
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(**)
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(**)
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PROCEDURE VET(VAR SOURCE: TEXT);
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(*MOVES NEXT INTERESTING TOKEN TO VETTED CHARACTER,
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AND SETS INDENT AND TEMPINDENT ACCORDINGLY*)
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VAR TREEPTR: TREEP;
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CH: CHAR;
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STATE: STATETYPE;
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CLAUSE: CLAUSETYPE;
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BOLD, FOUND: BOOLEAN;
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(**)
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PROCEDURE GAP(VAR SOURCE: TEXT);
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(*ENSURE THAT AT LEAST (SMALLINDENT-1) BLANKS ARE PRESENT IN OUTPUT*)
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VAR I: INTEGER;
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BEGIN
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I := SMALLINDENT-1;
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WHILE NOT EOLN(SOURCE) AND (SOURCE^=' ') AND (I>0) DO
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BEGIN GET(SOURCE); I := I-1 END;
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IF NOT EOLN(SOURCE) THEN
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FOR I := 2 TO SMALLINDENT DO WITH VETTEDCHARACTER DO
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BEGIN WORD[I] := ' '; INDEX := I END
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END;
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(**)
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PROCEDURE CHECK(CLAUSE: CLAUSETYPE);
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BEGIN WITH TOS^ DO
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IF C<>CLAUSE THEN (*ATTEMPT TO FIX BRACKETS MISMATCH*)
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IF NEXT^.C=CLAUSE THEN (*ASSUME CLOSER WAS OMITTED*)
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BEGIN
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IF C IN [BRIEF, INDEXER] THEN INDENT := INDENT-SMALLINDENT
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ELSE INDENT := INDENT-LARGEINDENT;
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POP;
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IF GONEON THEN
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BEGIN GONEON := FALSE; INDENT := INDENT+MIDINDENT END
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END
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ELSE (*ASSUME OPENER WAS OMITTED*)
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BEGIN
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IF CLAUSE IN [BRIEF, INDEXER] THEN INDENT := INDENT+SMALLINDENT
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ELSE INDENT := INDENT+LARGEINDENT;
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IF NOT GONEON THEN
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BEGIN GONEON := TRUE; INDENT := INDENT-MIDINDENT END;
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PUSH(CLAUSE)
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END
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END;
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(**)
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BEGIN (*VET*)
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(*ASSERT: (SOURCE^ IN [(!)[],.#";]) OR (UPPER & SOURCE^ IN [A..Z]) OR INPRAGMAT*)
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CH := SOURCE^;
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TEMPINDENT := INDENT;
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VETTEDCHARACTER.INDEX := 0;
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CASE STROPSTATE OF
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INPOINT: BOLD := CH='.';
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INUPPER: BOLD := CH IN ['.','A'..'Z'];
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INPRAGUP,INPRAGP: BOLD := CH IN ['.','A'..'Z','a'..'z'];
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END;
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IF CH='.' THEN WITH VETTEDCHARACTER DO
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BEGIN INDEX := 1; WORD[1] := '.'; GET(SOURCE); CH := SOURCE^ END;
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TREEPTR := ROOT^.NEXT; FOUND := FALSE;
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WHILE (TREEPTR<>NIL) AND NOT FOUND DO WITH TREEPTR^ DO
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IF C=CH THEN WITH VETTEDCHARACTER DO
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BEGIN
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INDEX := INDEX+1; WORD[INDEX] := CH;
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GET(SOURCE); CH := SOURCE^;
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IF BOLD THEN
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CASE STROPSTATE OF
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INPRAGUP,INPRAGP,INPOINT: FOUND := NOT(CH IN ['A'..'Z', 'a'..'z']) AND TIP;
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INUPPER: FOUND := NOT(CH IN ['A'..'Z']) AND TIP;
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END
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ELSE FOUND := TIP;
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IF NOT FOUND THEN TREEPTR := NEXT
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END
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ELSE IF CH<C THEN TREEPTR := LEFT
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ELSE TREEPTR := RIGHT;
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IF FOUND THEN WITH TREEPTR^ DO
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BEGIN STATE := ST; CLAUSE := CL END
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ELSE WITH VETTEDCHARACTER DO
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BEGIN
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IF BOLD THEN
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WHILE (CH IN ['A'..'Z', 'a'..'z']) DO
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(*ABSORB REMAINDER OF UNRECOGNIZED BOLDWORD*)
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BEGIN INDEX := INDEX+1; WORD[INDEX] := CH; GET(SOURCE); CH := SOURCE^ END
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ELSE
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BEGIN INDEX := INDEX+1; WORD[INDEX] := CH; GET(SOURCE); CH := SOURCE^ END;
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IF (CH=':') AND NOT INSTRAGMENT THEN WITH VETTEDCHARACTER DO
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(*START OF ROUTINE-TEXT*)
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BEGIN STATE := COLON; CLAUSE := ROUTINE;
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INDEX := INDEX+1; WORD[INDEX] := CH; GET(SOURCE)
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END
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ELSE BEGIN STATE := OTHER; CLAUSE := ANY END
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END;
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(**)
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IF INSTRAGMENT THEN
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IF (CLAUSE=TOS^.C) THEN
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(*MATCHING CLOSE-STRAGMENT-TOKEN FOUND*)
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BEGIN
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IF STROPSTATE IN [INPRAGUP,INPRAGP] THEN
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STROPSTATE := PRED(PRED(STROPSTATE));
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POP;
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INSTRAGMENT := FALSE;
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IF CLAUSE=HASH THEN INDENT := INDENT-SMALLINDENT
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ELSE IF CLAUSE<>STRING THEN INDENT := INDENT-LARGEINDENT;
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TEMPINDENT := INDENT
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END
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ELSE IF (STROPSTATE IN [INPRAGUP,INPRAGP]) AND (STATE=STROP) THEN
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IF CLAUSE=UPPER THEN STROPSTATE := INPRAGUP ELSE STROPSTATE := INPRAGP
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ELSE (*NO ACTION*)
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ELSE (*NOT INSTRAGMENT*)
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BEGIN
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IF STATE IN [MIDDLER, CLOSER] THEN (*MAYBE END OF ROUTINE-TEXT*)
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WHILE TOS^.C=ROUTINE DO
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BEGIN
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POP; INDENT := INDENT-SMALLINDENT;
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IF GONEON THEN
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BEGIN GONEON := FALSE; INDENT := INDENT+MIDINDENT END
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END;
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(**)
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IF STATE=GO THEN (*.GO OF .GO .TO*)
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BEGIN PUSH(JUMP); STATE := OTHER END
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ELSE IF STATE=DOER THEN (*CHANGE IT TO MIDDLER OR OPENER*)
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IF TOS^.C=JUMP THEN (*.TO OF .GO .TO*)
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BEGIN POP; STATE := OTHER END
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ELSE IF (TOS^.C=LOOPCL) AND NOT GONEON THEN STATE := MIDDLER
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ELSE STATE := OPENER;
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(**)
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IF STATE=COLON THEN (*START OF ROUTINE-TEXT*)
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BEGIN
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IF NOT GONEON THEN
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BEGIN GONEON := TRUE; INDENT := INDENT-MIDINDENT END;
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PUSH(CLAUSE);
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INDENT := INDENT+SMALLINDENT
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END
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ELSE IF STATE=OPENER THEN (*START OF A NEW INDENT*)
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BEGIN
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PUSH(CLAUSE);
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IF CLAUSE IN [BRIEF, INDEXER] THEN
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BEGIN INDENT := INDENT+SMALLINDENT; IF STARTOFLINE THEN GAP(SOURCE) END
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ELSE INDENT := INDENT+LARGEINDENT;
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GONEON := TRUE
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END
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ELSE IF STATE=MIDDLER THEN
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BEGIN
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IF NOT (CLAUSE IN [EXIT, SEMICOMMA]) THEN CHECK(CLAUSE);
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IF NOT GONEON THEN
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BEGIN GONEON := TRUE; INDENT := INDENT-MIDINDENT END;
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IF CLAUSE=SEMICOMMA THEN
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BEGIN TEMPINDENT := INDENT-SMALLINDENT; GAP(SOURCE) END
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ELSE IF TOS^.C=BRIEF THEN
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(* ! OR !: OR .EXIT AFTER ( *)
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BEGIN TEMPINDENT := INDENT-SMALLINDENT;
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IF STARTOFLINE AND (SOURCE^<>':') AND (CLAUSE<>EXIT) THEN GAP(SOURCE)
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END
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ELSE TEMPINDENT := INDENT-LARGEINDENT
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END
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ELSE IF STATE=CLOSER THEN (*END OF INDENT*)
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BEGIN
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CHECK(CLAUSE); POP;
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IF CLAUSE IN [BRIEF, INDEXER] THEN INDENT := INDENT-SMALLINDENT
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ELSE INDENT := INDENT-LARGEINDENT;
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TEMPINDENT := INDENT;
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IF GONEON THEN
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BEGIN GONEON := FALSE; INDENT := INDENT+MIDINDENT END
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END
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ELSE IF STATE=PRAGMENT THEN
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BEGIN
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TEMPINDENT := INDENT;
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PUSH(CLAUSE);
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INSTRAGMENT := TRUE;
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IF CLAUSE IN [PR,PRAGMAT] THEN
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STROPSTATE := SUCC(SUCC(STROPSTATE));
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IF CLAUSE=HASH THEN
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BEGIN INDENT := INDENT+SMALLINDENT; IF STARTOFLINE THEN GAP(SOURCE) END
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ELSE INDENT := INDENT+LARGEINDENT
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END
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ELSE IF STATE=QUOTE THEN
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BEGIN
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IF GONEON THEN
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BEGIN GONEON := FALSE; INDENT := INDENT+MIDINDENT END;
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PUSH(STRING);
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INSTRAGMENT := TRUE
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END
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ELSE (*STATE=OTHER*)
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IF GONEON THEN
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BEGIN GONEON := FALSE; INDENT := INDENT+MIDINDENT END
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END
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END (*OF VET*);
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(**)
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(**)
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PROCEDURE MAIN(VAR SOURCE: TEXT);
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VAR I: INTEGER;
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BEGIN
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INDENT := 0; INSTRAGMENT := FALSE;
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STROPSTATE := INUPPER; (*THE DEFAULT is UPPER*)
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GONEON := TRUE;
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SETUPTREE;
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LINENUMBERS := SOURCE^ IN ['0'..'9'];
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TOS := NIL; PUSH(ANY); PUSH(ANY);
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WHILE NOT EOF(SOURCE) DO
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BEGIN
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WHILE EOLN(SOURCE) DO BEGIN GET(SOURCE); WRITELN(OUTPUT) END;
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BEGIN
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STARTOFLINE := TRUE;
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IF LINENUMBERS THEN
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BEGIN
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WHILE SOURCE^ IN ['0'..'9'] DO
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BEGIN WRITE(OUTPUT, SOURCE^); GET(SOURCE) END;
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IF NOT EOLN(SOURCE) AND (SOURCE^=' ') THEN (*FIRST BLANK AFTER LINE NUMBER IS OBLIGATORY*)
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BEGIN WRITE(OUTPUT, ' '); GET(SOURCE) END
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END;
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IF TOS^.C=STRING THEN
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(*DO NOT TINKER WITH BLANKS INSIDE STRING-DENOTATIONS*)
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BEGIN
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WHILE NOT EOLN(SOURCE) AND (SOURCE^=' ') DO
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BEGIN WRITE(OUTPUT, ' '); GET(SOURCE) END;
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STARTOFLINE := FALSE
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END
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ELSE WHILE NOT EOLN(SOURCE) AND (SOURCE^=' ') DO
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GET(SOURCE); (*GET RID OF EXISTING INDENTATION*)
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WHILE NOT EOLN(SOURCE) DO
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BEGIN
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IF (SOURCE^ IN ['(','!',')','[',']',',','.','#','"',';']) OR
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((STROPSTATE<>INPOINT) AND (SOURCE^ IN ['A'..'Z'])) OR
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(STROPSTATE IN [INPRAGUP,INPRAGP]) THEN
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(*CHARACTER WHICH MIGHT AFFECT INDENTATION*)
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BEGIN
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VET(SOURCE);
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IF STARTOFLINE THEN FOR I := 1 TO TEMPINDENT DO WRITE(OUTPUT, ' ');
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WITH VETTEDCHARACTER DO
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FOR I := 1 TO INDEX DO WRITE(OUTPUT, WORD[I])
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END
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ELSE
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BEGIN
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IF STARTOFLINE THEN FOR I := 1 TO INDENT DO WRITE(OUTPUT, ' ');
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IF (SOURCE^<>' ') AND NOT INSTRAGMENT AND GONEON THEN
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(*PREPARE TO INDENT ANY CONTINUATION LINE*)
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BEGIN GONEON := FALSE; INDENT := INDENT+MIDINDENT END;
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WRITE(OUTPUT, SOURCE^); GET(SOURCE);
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END;
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STARTOFLINE := FALSE
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END;
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GET(SOURCE); WRITELN(OUTPUT)
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END;
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END;
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END;
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(**)
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FUNCTION ARGC: INTEGER; EXTERN;
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(**)
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BEGIN (*INDENT*)
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IF ARGC=1 THEN
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MAIN(INPUT)
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ELSE
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BEGIN
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RESET(SOURCE);
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MAIN(SOURCE);
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END;
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(*$G-*)
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END.
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