"PARSER for Zork III: The Dungeon Master The Great Underground Empire (Part 3) (c) Copyright 1982 Infocom, Inc. All Rights Reserved. " "Parser global variable convention: All parser globals will begin with 'P-'. Local variables are not restricted in any way. " > > ;"INBUF - Input buffer for READ" > ;"Parse-cont variable" > > > ;"Orphan flag" > > > > > ;"Parser variables and temporaries" ;"Byte offset to # of entries in LEXV" ;"Word offset to start of LEXV entries" ;"Number of words per LEXV entry" ;"Offset to parts of speech byte" ;"Offset to first part of speech" ;"First part of speech bit mask in PSOFF byte" > > > > " Grovel down the input finding the verb, prepositions, and noun clauses. If the input is or , fall out immediately setting PRSA to ,V?WALK and PRSO to . Otherwise, perform all required orphaning, syntax checking, and noun clause lookup." ) LEN (DIR <>) (NW 0) (LW 0) NUM SCNT (CNT -1)) > ,P-ITBLLEN> ) (T )>> > > > ,VEHBIT>> >)>)> <==? ,PLAYER ,WINNER>> )> >) (T > ,VEHBIT>> >)> )> "> )> > )> > > 0> > ) (> >> > ) ( > )> > ) ( > >) (T )>)> >> ) (> ,ACT?WALK> <==? .VERB ,ACT?WALK>> >> ,W?THEN ,W?. ,W?QUOTE> >> > >>> ,W?THEN>)> > > )>) (> ; >> 2>>>> >>) (> > >> <==? > ,W?OF> ;> <0? .VAL> >>) (> > ,W?THEN ,W?.>>> )>) (<==? ,P-NCN 2> ) (T > > > > )>)>) ;( > ) () ( > ) (T )>) (T )> >> )> > )> ; 0> )> > T)>> > ;"Check whether word pointed at by PTR is the correct part of speech. The second argument is the part of speech (,PS?). The 3rd argument (,P1?), if given, causes the value for that part of speech to be returned." > .BIT> ) (T > > >)> )>)>> ;" Scan through a noun clause, leave a pointer to its starting location" ) (FIRST?? T) NW (LW 0)) #DECL ((PTR VAL OFF NUM) FIX (WRD NW) (ANDFLG FIRST??) ) 2>> > > .VAL> .WRD> >) (T >)> > )> > >> ,W?THE ,W?A ,W?AN> 4>>)> > 0> >> )> > >> ) (T >>)> ; <==? ,ACT?ACCUSE>> )> > ) ( ) ( > >)>) ( >> > >> >) ( > >) ( > >> 2>>> ) (T >)>) ( >) ( >> > ,W?THEN> >) ( T) (T )>) (T )> > >>> )) > 2>> > 3>> > 0> ) (T > ) ( ) ( > <- .CHR 48>>>) (T )> >)>> ) (.TIM >) ( )> >>)> ,W?INTNUM> ) WRD) #DECL ((CNT TEMP VERB) FIX (BEG END) (WRD) TABLE) > >>> >>> ) (<==? ,P-NCN 2> ) (<==? 1> > > <0? .TEMP>> > >) (T )>) (<==? 1> > > <0? .TEMP>> > > ) (T )>) (,P-ACLAUSE > > ) (T > > ) (T > )>) ( > ,P-PSOFF> ,PS?ADJECTIVE>> ) ( ,PS?OBJECT> <==? .WRD ,W?ONE>> > ) (T )>)> >>)>)> > ,P-ITBLLEN> ) (T >)>> T> .ADJ> 0>> > > > ;"Print undefined word in input. PTR points to the unknown word in P-LEXV" ) (ELSE > >)>>> >> 2> 3>> > >> >> 2> 3>> > >> ;" Perform syntax matching operations, using P-ITBL as the source of the verb and adjectives for this input. Returns false if no syntax matches, and does it's own orphaning. If return is true, the syntax is saved in P-SYNTAX." ) (DRIVE2 <>) PREP VERB TMP) #DECL ((DRIVE1 DRIVE2) > (SYN) (LEN NUM VERB PREP) FIX (OBJ) ) >> )> >> > > ,P-SONUMS>> > <0? ,P-NCN> >> <==? .PREP >>> ) (<==? > <==? ,P-NCN 1>> ) (<==? > )>)> ) (T )>) (T >)>> >>> ) ( >>> ) ( ) (T > ) (<0? > >) (T > )> )> ) (T )>> )>> >) ) (T >)>> )> > )> > ) (.D2 > )>> T>> ) WRD (FIRST?? T) (PN <>)) #DECL ((BEG END) (CP) ) ) (T >) (T )> > ,W?.> ) (T .CP> )> ) ( <==? ,P-IT-LOC ,HERE>> ) (T >)> >)>)> >>> > 32>> 1> <+ 1>>> > > )>> ) "AUX" BEG END) #DECL ((BPTR EPTR) FIX (BEG END) (INSRT) ) > > ,P-LEXELEN> 2>>> ,P-LEXELEN> 2>>> ) (T >> )> >)> >>> 2>> .WRD> > 2>> ) (<==? .PREP> >>)>>> ) >> )> > 1> > > > ) (T )>)> .OBJ)>) (T )>> >) > 0>> > ,P-PRSO> > > >>)> > 0>> > ,P-PRSI> > >> 1> >) (T >)>)>)> > > ) (> ,P-BUTS>) (T .OBJ> >)> >> .NTBL> > > > > > > > > > > > ) LEN WV WRD NW) #DECL ((TBL) TABLE (PTR EPTR) (BUT) (WV) ) > >>) (T > >)>) ( > > ) ( >)>) (T > > >)>) ( >> > > T) () () (<==? .WRD ,W?OF> )>) (> > ) ( )>)> > > )>>> ) (OLEN 0)) #DECL ((TBL) TABLE (XBTS BTS TLEN LEN) FIX (GWIM) (VRB GCHECK) ) > )> ,P-ADJ> >) (> > )>)> > <0? ,P-GWIMBIT>> )> )> > <0? ,P-SLOCBITS>> )> ) (T )> > )>)> .TLEN>> ) ( >> > >> > )> ) ( >>> .LEN>> ) (T )> ,P-NC1) (T ,P-NC2)>> <>> ) (.VRB )> > > )>) ( .GCHECK> > ) (,LIT )> )>) (T >)> ) (T )>)> > > ) (<0? .LEN> )> > > >> > > > )> ) ( )> > 1> )>>> (RMGL CNT) FIX (OBJ) OBJECT) > > 1>> > .TBL> )> )>>)> > 4> 1>> >> 1>>> 5>> > > ) ( )>>)> .LEN> > > )>)>> > ) (T ) ( ) (T )>)>> (TBL) TABLE (LVL) FIX (FLS) ANY) > > > )> > > > >> ,P-SRCALL) ( ,P-SRCALL) (T ,P-SRCTOP)>>>)> >) (T )>>)>> > .OBJ> >> > >>> ) > > > 0> ) (T >> )> > ) (<==? > T> >) (T )> > ) ( )>)>)>>) (T)>> ) TMP) #DECL ((LOSS) ) 1> ,SMANY>>> ) ( 1> ,SMANY>>> )> )> > ) (,P-OFLAG >) (T >)> ) (T)>> )> > ) (ELSE >)> > ) ( )>>> > ) ( )>>> )) #DECL ((RM OHERE) OBJECT (LIT) ) ) (T )> 0> )>)> .LIT> > 0> ,W?IT>> ) (T <>>)>> > 0> ,W?IT>> ) (T <>>)>>