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parser.zil
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parser.zil
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"PARSER for
Interlogic SF
Copyright 1981,1982 Infocom, Inc. All rights reserved
"
"Parser global variable convention: All parser globals will
begin with 'P-'. Local variables are not restricted in any
way.
"
<SETG SIBREAKS ".,\"">
<GLOBAL ALWAYS-LIT <>>
<GLOBAL GWIM-DISABLE <>>
<GLOBAL PRSA 0>
<GLOBAL PRSI 0>
<GLOBAL PRSO 0>
<GLOBAL P-ADVERB <>>
<GLOBAL P-ADJECTIVE <>>
<GLOBAL P-SPACE 1>
<GLOBAL P-TABLE 0>
<GLOBAL P-ONEOBJ 0>
<GLOBAL P-SYNTAX 0>
<GLOBAL P-CCSRC 0>
<GLOBAL P-LEN 0>
<GLOBAL P-DIR 0>
<GLOBAL HERE 0>
<GLOBAL WINNER 0>
<GLOBAL P-LEXV <ITABLE BYTE 120>>
;"INBUF - Input buffer for READ"
<GLOBAL P-INBUF <ITABLE BYTE 100>>
;"Parse-cont variable"
;"AGAIN globals"
<GLOBAL A-LEXV <ITABLE BYTE 120>>
<GLOBAL A-INBUF <ITABLE BYTE 100>>
<GLOBAL A-PTR 0>
<GLOBAL A-PTR2 0>;"need to save 2 pointers back"
<GLOBAL NOT-AGAIN 2>;"values: <> if V-AGAIN is calling MAIN-LOOP
1 if AGAIN was last verb; 2 otherwise"
<GLOBAL P-CONT <>>
<GLOBAL P-IT-OBJECT <>>
<GLOBAL P-IT-LOC <>>
;"Orphan flag"
<GLOBAL P-OFLAG <>>
<GLOBAL P-MERGED <>>
<GLOBAL P-ACLAUSE <>>
<GLOBAL P-ANAM <>>
<GLOBAL P-AADJ <>>
;"Parser variables and temporaries"
<CONSTANT P-PHRLEN 3>
<CONSTANT P-ORPHLEN 7>
<CONSTANT P-RTLEN 3>
;"Byte offset to # of entries in LEXV"
<CONSTANT P-LEXWORDS 1>
;"Word offset to start of LEXV entries"
<CONSTANT P-LEXSTART 1>
;"Number of words per LEXV entry"
<CONSTANT P-LEXELEN 2>
<CONSTANT P-WORDLEN 4>
;"Offset to parts of speech byte"
<CONSTANT P-PSOFF 4>
;"Offset to first part of speech"
<CONSTANT P-P1OFF 5>
;"First part of speech bit mask in PSOFF byte"
<CONSTANT P-P1BITS 3>
<CONSTANT P-ITBLLEN 9>
<GLOBAL P-ITBL <TABLE 0 0 0 0 0 0 0 0 0 0>>
<GLOBAL P-OTBL <TABLE 0 0 0 0 0 0 0 0 0 0>>
<GLOBAL P-VTBL <TABLE 0 0 0 0>>
<GLOBAL P-NCN 0>
<CONSTANT P-VERB 0>
<CONSTANT P-VERBN 1>
<CONSTANT P-PREP1 2>
<CONSTANT P-PREP1N 3>
<CONSTANT P-PREP2 4>
<CONSTANT P-PREP2N 5>
<CONSTANT P-NC1 6>
<CONSTANT P-NC1L 7>
<CONSTANT P-NC2 8>
<CONSTANT P-NC2L 9>
<GLOBAL QUOTE-FLAG <>>
<ROUTINE TABLE-COPY (SRC DEST CNT)
<SET CNT <* .CNT 2>>
<REPEAT ()
<COND (<DLESS? CNT 0> <RETURN>)
(T <PUTB .DEST .CNT <GETB .SRC .CNT>>)>>>
" Grovel down the input finding the verb, prepositions, and noun clauses.
If the input is <direction> or <walk> <direction>, fall out immediately
setting PRSA to ,V?WALK and PRSO to <direction>. Otherwise, perform
all required orphaning, syntax checking, and noun clause lookup."
<ROUTINE PARSER ("AUX" (PTR ,P-LEXSTART) WORD (VAL 0) (VERB <>)
LEN (DIR <>) (NW 0) (LW 0) NUM SCNT (CNT -1))
<REPEAT ()
<COND (<G? <SET CNT <+ .CNT 1>> ,P-ITBLLEN> <RETURN>)
(T <PUT ,P-ITBL .CNT 0>)>>
<SETG P-NUMBER <>>
<SETG P-ADVERB <>>
<SETG P-ADJECTIVE <>>
<SETG P-MERGED <>>
<PUT ,P-PRSO ,P-MATCHLEN 0>
<PUT ,P-PRSI ,P-MATCHLEN 0>
<PUT ,P-BUTS ,P-MATCHLEN 0>
<COND (<AND <NOT ,QUOTE-FLAG> <N==? ,WINNER ,ADVENTURER>>
<SETG WINNER ,ADVENTURER>
<COND (<NOT <FSET? <LOC ,WINNER> ,VEHBIT>>
<SETG HERE <LOC ,WINNER>>)>)>
<COND (,P-CONT
<SET PTR ,P-CONT>
<SETG P-CONT <>>
<COND (<NOT <VERB? TELL>> <CRLF>)>)
(T
<SETG WINNER ,ADVENTURER>
<SETG QUOTE-FLAG <>>
<COND (<NOT <FSET? <LOC ,WINNER> ,VEHBIT>>
<SETG HERE <LOC ,WINNER>>)>
<COND (<==? ,NOT-AGAIN 2>
<TABLE-COPY ,P-INBUF ,A-INBUF 50 ;100>
<TABLE-COPY ,P-LEXV ,A-LEXV 60 ;120>)>
<SET SCNT ,P-SPACE>
<REPEAT ()
<COND (<L? <SET SCNT <- .SCNT 1>> 0> <RETURN>)
(T <CRLF>)>>
<TELL ">">
<READ ,P-INBUF ,P-LEXV>)>
<SETG P-LEN <GETB ,P-LEXV ,P-LEXWORDS>>
<COND (<0? ,P-LEN> <TELL "I beg your pardon?" CR> <RFALSE>)>
<SET LEN ,P-LEN>
<SETG P-DIR <>>
<SETG P-NCN 0>
<SETG P-GETFLAGS 0>
;"3/25/83: Next statement added."
<PUT ,P-ITBL ,P-VERBN 0>
<COND (<==? ,NOT-AGAIN 2>
<SETG A-PTR ,A-PTR2>
<COND (<NOT <==? .PTR ,P-LEXSTART>>
<TABLE-COPY ,P-INBUF ,A-INBUF 50 ;100>
<TABLE-COPY ,P-LEXV ,A-LEXV 60 ;120>)>)
(<==? ,NOT-AGAIN 1> <SETG NOT-AGAIN 2>)>
<SETG A-PTR2 .PTR>
<REPEAT ()
<COND (<L? <SETG P-LEN <- ,P-LEN 1>> 0>
<SETG QUOTE-FLAG <>>
<RETURN>)
(<OR <SET WORD <GET ,P-LEXV .PTR>>
<SET WORD <NUMBER? .PTR>>>
<COND (<AND <==? .WORD ,W?TO>
<EQUAL? .VERB ,ACT?TELL>>
<SET WORD ,W?QUOTE>)
(<AND <==? .WORD ,W?THEN>
<NOT .VERB>>
<PUT ,P-ITBL ,P-VERB ,ACT?TELL>
<PUT ,P-ITBL ,P-VERBN 0>
<SET WORD ,W?QUOTE>)>
<COND ;(<AND <EQUAL? .WORD ,W?PERIOD>
<EQUAL? .LW ,W?MRS ,W?MR ,W?MS>>
<SET LW 0>)
(<OR <EQUAL? .WORD ,W?THEN ,W?PERIOD>
<EQUAL? .WORD ,W?QUOTE>>
<COND (<EQUAL? .WORD ,W?QUOTE>
<COND (,QUOTE-FLAG
<SETG QUOTE-FLAG <>>)
(T <SETG QUOTE-FLAG T>)>)>
<OR <0? ,P-LEN>
<SETG P-CONT <+ .PTR ,P-LEXELEN>>>
<PUTB ,P-LEXV ,P-LEXWORDS ,P-LEN>
<RETURN>)
(<AND <SET VAL
<WT? .WORD
,PS?DIRECTION
,P1?DIRECTION>>
<OR <==? .LEN 1>
<AND <==? .LEN 2> <==? .VERB ,ACT?WALK>>
<AND <EQUAL? <SET NW
<GET ,P-LEXV
<+ .PTR ,P-LEXELEN>>>
,W?THEN
,W?QUOTE>
<==? .VERB ,ACT?WALK>
<G? .LEN 2>>
<AND <EQUAL? .NW ,W?PERIOD>
<EQUAL? .VERB ,ACT?WALK <>>
<G? .LEN 1>>
<AND ,QUOTE-FLAG
<==? .LEN 2>
<EQUAL? .NW ,W?QUOTE>>
<AND <G? .LEN 2>
<==? .VERB ,ACT?WALK>
<EQUAL? .NW ,W?COMMA ,W?AND>>>>
<SET DIR .VAL>
<COND (<EQUAL? .NW ,W?COMMA ,W?AND>
<PUT ,P-LEXV
<+ .PTR ,P-LEXELEN>
,W?THEN>)>
<COND (<NOT <G? .LEN 2>>
<SETG QUOTE-FLAG <>>
<RETURN>)>)
(<AND <SET VAL <WT? .WORD ,PS?VERB ,P1?VERB>>
<NOT .VERB>>
<SET VERB .VAL>
<PUT ,P-ITBL ,P-VERB .VAL>
<PUT ,P-ITBL ,P-VERBN ,P-VTBL>
<PUT ,P-VTBL 0 .WORD>
<PUTB ,P-VTBL 2 <GETB ,P-LEXV
<SET NUM
<+ <* .PTR 2> 2>>>>
<PUTB ,P-VTBL 3 <GETB ,P-LEXV <+ .NUM 1>>>)
(<OR <SET VAL <WT? .WORD ,PS?PREPOSITION 0>>
<AND <OR <EQUAL? .WORD ,W?ALL ,W?ONE ,W?A>
<WT? .WORD ,PS?ADJECTIVE>
<WT? .WORD ,PS?OBJECT>>
<SET VAL 0>>>
<COND (<AND <G? ,P-LEN 0>
<==? <GET ,P-LEXV
<+ .PTR ,P-LEXELEN>>
,W?OF>
;<NOT <EQUAL? .VERB ,ACT?ACCUSE>>
<0? .VAL>
<NOT
<EQUAL? .WORD ,W?ALL ,W?ONE ,W?A>>>)
(<AND <NOT <0? .VAL>>
<OR <0? ,P-LEN>
<EQUAL? <GET ,P-LEXV <+ .PTR 2>>
,W?THEN ,W?PERIOD>>>
<COND (<L? ,P-NCN 2>
<PUT ,P-ITBL ,P-PREP1 .VAL>
<PUT ,P-ITBL ,P-PREP1N .WORD>)>)
(<==? ,P-NCN 2>
<TELL
"I found too many nouns in that sentence." CR>
<RFALSE>)
(T
<SETG P-NCN <+ ,P-NCN 1>>
<OR <SET PTR <CLAUSE .PTR .VAL .WORD>>
<RFALSE>>
<COND (<L? .PTR 0>
<SETG QUOTE-FLAG <>>
<RETURN>)>)>)
;(<OR <EQUAL? .WORD ,W?CAREFULLY ,W?QUIETLY>
<EQUAL? .WORD ,W?SLOWLY ,W?QUICKLY
,W?BRIEFLY>>
<SETG P-ADVERB .WORD>)
(<WT? .WORD ,PS?BUZZ-WORD>)
(T
<CANT-USE .PTR>
<RFALSE>)>)
(T
<UNKNOWN-WORD .PTR>
<RFALSE>)>
<SET LW .WORD>
<SET PTR <+ .PTR ,P-LEXELEN>>>
<COND (.DIR
<SETG PRSA ,V?WALK>
<SETG PRSO .DIR>
<SETG P-WALK-DIR .DIR>
<RETURN T>)>
<SETG P-WALK-DIR <>>
<COND (,P-OFLAG <ORPHAN-MERGE>)>
;<COND (<==? <GET ,P-ITBL ,P-VERB> 0> <PUT ,P-ITBL ,P-VERB ,ACT?CALL>)>
<COND (<AND <SYNTAX-CHECK> <SNARF-OBJECTS> <TAKE-CHECK> <MANY-CHECK>>
T)>>
<GLOBAL P-WALK-DIR <>>
;"Check whether word pointed at by PTR is the correct part of speech.
The second argument is the part of speech (,PS?<part of speech>). The
3rd argument (,P1?<part of speech>), if given, causes the value
for that part of speech to be returned."
<ROUTINE WT? (PTR BIT "OPTIONAL" (B1 5) "AUX" (OFFST ,P-P1OFF) TYP)
<COND (<BTST <SET TYP <GETB .PTR ,P-PSOFF>> .BIT>
<COND (<G? .B1 4> <RTRUE>)
(T
<SET TYP <BAND .TYP ,P-P1BITS>>
<COND (<NOT <==? .TYP .B1>> <SET OFFST <+ .OFFST 1>>)>
<GETB .PTR .OFFST>)>)>>
;" Scan through a noun clause, leave a pointer to its starting location"
<ROUTINE CLAUSE (PTR VAL WORD "AUX" OFF NUM (ANDFLG <>) (FIRST?? T) NW (LW 0))
#DECL ((PTR VAL OFF NUM) FIX (WORD NW) <OR FALSE FIX TABLE>
(ANDFLG FIRST??) <OR ATOM FALSE>)
<SET OFF <* <- ,P-NCN 1> 2>>
<COND (<NOT <==? .VAL 0>>
<PUT ,P-ITBL <SET NUM <+ ,P-PREP1 .OFF>> .VAL>
<PUT ,P-ITBL <+ .NUM 1> .WORD>
<SET PTR <+ .PTR ,P-LEXELEN>>)
(T <SETG P-LEN <+ ,P-LEN 1>>)>
<COND (<0? ,P-LEN> <SETG P-NCN <- ,P-NCN 1>> <RETURN -1>)>
<PUT ,P-ITBL <SET NUM <+ ,P-NC1 .OFF>> <REST ,P-LEXV <* .PTR 2>>>
<COND (<EQUAL? <GET ,P-LEXV .PTR> ,W?THE ,W?A ,W?AN>
<PUT ,P-ITBL .NUM <REST <GET ,P-ITBL .NUM> 4>>)>
<REPEAT ()
<COND (<L? <SETG P-LEN <- ,P-LEN 1>> 0>
<PUT ,P-ITBL <+ .NUM 1> <REST ,P-LEXV <* .PTR 2>>>
<RETURN -1>)>
<COND (<OR <SET WORD <GET ,P-LEXV .PTR>>
<SET WORD <NUMBER? .PTR>>>
<COND (<0? ,P-LEN> <SET NW 0>)
(T <SET NW <GET ,P-LEXV <+ .PTR ,P-LEXELEN>>>)>
;<COND (<AND <==? .WORD ,W?OF>
<==? <GET ,P-ITBL ,P-VERB> ,ACT?ACCUSE>>
<PUT ,P-LEXV .PTR ,W?WITH>
<SET WORD ,W?WITH>)>
<COND ;(<AND <EQUAL? .WORD ,W?PERIOD>
<EQUAL? .LW ,W?MRS ,W?MR ,W?MS>>
<SET LW 0>)
(<EQUAL? .WORD ,W?AND ,W?COMMA> <SET ANDFLG T>)
(<EQUAL? .WORD ,W?ALL ,W?ONE>
<COND (<==? .NW ,W?OF>
<SETG P-LEN <- ,P-LEN 1>>
<SET PTR <+ .PTR ,P-LEXELEN>>)>)
(<OR <EQUAL? .WORD ,W?THEN ,W?PERIOD>
<AND <WT? .WORD ,PS?PREPOSITION>
<NOT .FIRST??>>>
<SETG P-LEN <+ ,P-LEN 1>>
<PUT ,P-ITBL
<+ .NUM 1>
<REST ,P-LEXV <* .PTR 2>>>
<RETURN <- .PTR ,P-LEXELEN>>)
(<AND .ANDFLG
<OR <WT? .WORD ,PS?DIRECTION>
<WT? .WORD ,PS?VERB>>>
<SET PTR <- .PTR 4>>
<PUT ,P-LEXV <+ .PTR 2> ,W?THEN>
<SETG P-LEN <+ ,P-LEN 2>>)
(<WT? .WORD ,PS?OBJECT>
<COND (<AND <WT? .WORD
,PS?ADJECTIVE
,P1?ADJECTIVE>
<NOT <==? .NW 0>>
<WT? .NW ,PS?OBJECT>>)
(<AND <NOT .ANDFLG>
<NOT <EQUAL? .NW ,W?BUT ,W?EXCEPT>>
<NOT <EQUAL? .NW ,W?AND ,W?COMMA>>>
<PUT ,P-ITBL
<+ .NUM 1>
<REST ,P-LEXV <* <+ .PTR 2> 2>>>
<RETURN .PTR>)
(T <SET ANDFLG <>>)>)
(<OR <WT? .WORD ,PS?ADJECTIVE>
<WT? .WORD ,PS?BUZZ-WORD>>)
(<WT? .WORD ,PS?PREPOSITION> T)
(T
<CANT-USE .PTR>
<RFALSE>)>)
(T <UNKNOWN-WORD .PTR> <RFALSE>)>
<SET LW .WORD>
<SET FIRST?? <>>
<SET PTR <+ .PTR ,P-LEXELEN>>>>
<ROUTINE NUMBER? (PTR "AUX" CNT BPTR CHR (SUM 0) (TIM <>))
<SET CNT <GETB <REST ,P-LEXV <* .PTR 2>> 2>>
<SET BPTR <GETB <REST ,P-LEXV <* .PTR 2>> 3>>
<REPEAT ()
<COND (<L? <SET CNT <- .CNT 1>> 0> <RETURN>)
(T
<SET CHR <GETB ,P-INBUF .BPTR>>
<COND (<==? .CHR 58>
<SET TIM .SUM>
<SET SUM 0>)
(<G? .SUM 10000> <RFALSE>)
(<AND <L? .CHR 58> <G? .CHR 47>>
<SET SUM <+ <* .SUM 10> <- .CHR 48>>>)
(T <RFALSE>)>
<SET BPTR <+ .BPTR 1>>)>>
<PUT ,P-LEXV .PTR ,W?INTNUM>
<COND (<G? .SUM 1000> <RFALSE>)
(.TIM
<COND (<L? .TIM 8> <SET TIM <+ .TIM 12>>)
(<G? .TIM 23> <RFALSE>)>
<SET SUM <+ .SUM <* .TIM 60>>>)>
<SETG P-NUMBER .SUM>
,W?INTNUM>
<GLOBAL P-NUMBER 0>
<ROUTINE ORPHAN-MERGE ("AUX" (CNT -1) TEMP VERB BEG END (ADJ <>) WRD)
#DECL ((CNT TEMP VERB) FIX (BEG END) <PRIMTYPE VECTOR> (WRD) TABLE)
<SETG P-OFLAG <>>
<COND
(<AND <NOT <0? <SET VERB <GET ,P-ITBL ,P-VERB>>>>
<NOT <==? .VERB <GET ,P-OTBL ,P-VERB>>>>
<RFALSE>)
(<==? ,P-NCN 2>
<RFALSE>)
(<==? <GET ,P-OTBL ,P-NC1> 1>
<COND (<OR <==? <SET TEMP <GET ,P-ITBL ,P-PREP1>> <GET ,P-OTBL ,P-PREP1>>
<0? .TEMP>>
<PUT ,P-OTBL ,P-NC1 <GET ,P-ITBL ,P-NC1>>
<PUT ,P-OTBL ,P-NC1L <GET ,P-ITBL ,P-NC1L>>)
(T <RFALSE>)>)
(<==? <GET ,P-OTBL ,P-NC2> 1>
<COND (<OR <==? <SET TEMP <GET ,P-ITBL ,P-PREP1>> <GET ,P-OTBL ,P-PREP2>>
<0? .TEMP>>
<PUT ,P-OTBL ,P-NC2 <GET ,P-ITBL ,P-NC1>>
<PUT ,P-OTBL ,P-NC2L <GET ,P-ITBL ,P-NC1L>>
<SETG P-NCN 2>)
(T <RFALSE>)>)
(,P-ACLAUSE
<COND
(<NOT <==? ,P-NCN 1>> <SETG P-ACLAUSE <>> <RFALSE>)
(T
<SET BEG <GET ,P-ITBL ,P-NC1>>
<SET END <GET ,P-ITBL ,P-NC1L>>
<REPEAT ()
<COND (<==? .BEG .END>
<COND (.ADJ
<ACLAUSE-WIN .ADJ>
<RETURN>)
(T
<SETG P-ACLAUSE <>>
<RFALSE>)>)
(<AND <NOT .ADJ>
<BTST <GETB <SET WRD <GET .BEG 0>> ,P-PSOFF>
,PS?ADJECTIVE>>
<SET ADJ .WRD>)
(<OR <BTST <GETB .WRD ,P-PSOFF> ,PS?OBJECT>
<==? .WRD ,W?ONE>>
<COND (<NOT <EQUAL? .WRD ,P-ANAM ,W?ONE>> <RFALSE>)
(T
<ACLAUSE-WIN .ADJ>
<RETURN>)>)>
<SET BEG <REST .BEG ,P-WORDLEN>>>)>)>
<REPEAT ()
<COND (<G? <SET CNT <+ .CNT 1>> ,P-ITBLLEN>
<SETG P-MERGED T>
<RTRUE>)
(T <PUT ,P-ITBL .CNT <GET ,P-OTBL .CNT>>)>>
T>
<ROUTINE ACLAUSE-WIN (ADJ)
<SETG P-CCSRC ,P-OTBL>
<CLAUSE-COPY ,P-ACLAUSE <+ ,P-ACLAUSE 1> .ADJ>
<AND <NOT <==? <GET ,P-OTBL ,P-NC2> 0>>
<SETG P-NCN 2>>
<SETG P-ACLAUSE <>>
<RTRUE>>
;"Print undefined word in input.
PTR points to the unknown word in P-LEXV"
<ROUTINE WORD-PRINT (CNT BUF)
<REPEAT ()
<COND (<DLESS? CNT 0> <RETURN>)
(ELSE
<PRINTC <GETB ,P-INBUF .BUF>>
<SET BUF <+ .BUF 1>>)>>>
<ROUTINE UNKNOWN-WORD (PTR "AUX" BUF)
#DECL ((PTR BUF) FIX)
<TELL "I don't know the word '">
<WORD-PRINT <GETB <REST ,P-LEXV <SET BUF <* .PTR 2>>> 2>
<GETB <REST ,P-LEXV .BUF> 3>>
<TELL "'." CR>
<SETG QUOTE-FLAG <>>
<SETG P-OFLAG <>>>
<ROUTINE CANT-USE (PTR "AUX" BUF)
#DECL ((PTR BUF) FIX)
<TELL "I can't use the word '">
<WORD-PRINT <GETB <REST ,P-LEXV <SET BUF <* .PTR 2>>> 2>
<GETB <REST ,P-LEXV .BUF> 3>>
<TELL "' here." CR>
<SETG QUOTE-FLAG <>>
<SETG P-OFLAG <>>>
;" 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."
<GLOBAL P-SLOCBITS 0>
<CONSTANT P-SYNLEN 8>
<CONSTANT P-SBITS 0>
<CONSTANT P-SPREP1 1>
<CONSTANT P-SPREP2 2>
<CONSTANT P-SFWIM1 3>
<CONSTANT P-SFWIM2 4>
<CONSTANT P-SLOC1 5>
<CONSTANT P-SLOC2 6>
<CONSTANT P-SACTION 7>
<CONSTANT P-SONUMS 3>
<ROUTINE SYNTAX-CHECK ("AUX" SYN LEN NUM OBJ (DRIVE1 <>) (DRIVE2 <>) PREP VERB TMP)
#DECL ((DRIVE1 DRIVE2) <OR FALSE <PRIMTYPE VECTOR>>
(SYN) <PRIMTYPE VECTOR> (LEN NUM VERB PREP) FIX
(OBJ) <OR FALSE OBJECT>)
<COND (<0? <SET VERB <GET ,P-ITBL ,P-VERB>>>
<TELL "I can't find a verb in that sentence!" CR>
<RFALSE>)>
<SET SYN <GET ,VERBS <- 255 .VERB>>>
<SET LEN <GETB .SYN 0>>
<SET SYN <REST .SYN>>
<REPEAT ()
<SET NUM <BAND <GETB .SYN ,P-SBITS> ,P-SONUMS>>
<COND (<AND <NOT <L? .NUM 1>>
<0? ,P-NCN>
<OR <0? <SET PREP <GET ,P-ITBL ,P-PREP1>>>
<==? .PREP <GETB .SYN ,P-SPREP1>>>>
<SET DRIVE1 .SYN>)
(<==? <GETB .SYN ,P-SPREP1> <GET ,P-ITBL ,P-PREP1>>
<COND (<AND <==? .NUM 2> <==? ,P-NCN 1>>
<SET DRIVE2 .SYN>)
(<==? <GETB .SYN ,P-SPREP2> <GET ,P-ITBL ,P-PREP2>>
<SYNTAX-FOUND .SYN>
<RTRUE>)>)>
<COND (<DLESS? LEN 1>
<COND (<OR .DRIVE1 .DRIVE2> <RETURN>)
(T
<TELL "I don't understand that sentence." CR>
<RFALSE>)>)
(T <SET SYN <REST .SYN ,P-SYNLEN>>)>>
<COND (<AND .DRIVE1
<SET OBJ
<GWIM <GETB .DRIVE1 ,P-SFWIM1>
<GETB .DRIVE1 ,P-SLOC1>
<GETB .DRIVE1 ,P-SPREP1>>>>
<PUT ,P-PRSO ,P-MATCHLEN 1>
<PUT ,P-PRSO 1 .OBJ>
<SYNTAX-FOUND .DRIVE1>)
(<AND .DRIVE2
<SET OBJ
<GWIM <GETB .DRIVE2 ,P-SFWIM2>
<GETB .DRIVE2 ,P-SLOC2>
<GETB .DRIVE2 ,P-SPREP2>>>>
<PUT ,P-PRSI ,P-MATCHLEN 1>
<PUT ,P-PRSI 1 .OBJ>
<SYNTAX-FOUND .DRIVE2>)
(<EQUAL? .VERB ,ACT?FIND>
<TELL "I can't answer that question." CR>
<RFALSE>)
(<NOT <==? ,WINNER ,ADVENTURER>>
<CANT-ORPHAN>)
(T
<ORPHAN .DRIVE1 .DRIVE2>
<TELL "What do you want to ">
<SET TMP <GET ,P-OTBL ,P-VERBN>>
<COND (<==? .TMP 0> <TELL "tell">)
(<0? <GETB ,P-VTBL 2>>
<PRINTB <GET .TMP 0>>)
(T
<WORD-PRINT <GETB .TMP 2> <GETB .TMP 3>>
<PUTB ,P-VTBL 2 0>)>
<COND (.DRIVE2
<CLAUSE-PRINT ,P-NC1 ,P-NC1L>)>
<SETG P-OFLAG T>
<PREP-PRINT <COND (.DRIVE1 <GETB .DRIVE1 ,P-SPREP1>)
(T <GETB .DRIVE2 ,P-SPREP2>)>>
<TELL "?" CR>
<RFALSE>)>>
<ROUTINE CANT-ORPHAN ()
<TELL "\"That command was incomplete. Why don't you try again?\"" CR>
<RFALSE>>
<ROUTINE ORPHAN (D1 D2 "AUX" (CNT -1))
#DECL ((D1 D2) <OR FALSE <PRIMTYPE VECTOR>>)
<PUT ,P-OCLAUSE ,P-MATCHLEN 0>
<SETG P-CCSRC ,P-ITBL>
<REPEAT ()
<COND (<IGRTR? CNT ,P-ITBLLEN> <RETURN>)
(T <PUT ,P-OTBL .CNT <GET ,P-ITBL .CNT>>)>>
<COND (<==? ,P-NCN 2> <CLAUSE-COPY ,P-NC2 ,P-NC2L>)>
<COND (<NOT <L? ,P-NCN 1>> <CLAUSE-COPY ,P-NC1 ,P-NC1L>)>
<COND (.D1
<PUT ,P-OTBL ,P-PREP1 <GETB .D1 ,P-SPREP1>>
<PUT ,P-OTBL ,P-NC1 1>)
(.D2
<PUT ,P-OTBL ,P-PREP2 <GETB .D2 ,P-SPREP2>>
<PUT ,P-OTBL ,P-NC2 1>)>>
<ROUTINE CLAUSE-PRINT (BPTR EPTR)
<BUFFER-PRINT <GET ,P-ITBL .BPTR> <GET ,P-ITBL .EPTR> T>>
<ROUTINE BUFFER-PRINT (BEG END CP "AUX" (NOSP <>) WRD (FIRST?? T) (PN <>))
#DECL ((BEG END) <PRIMTYPE VECTOR> (CP) <OR FALSE ATOM>)
<REPEAT ()
<COND (<==? .BEG .END> <RETURN>)
(T
<COND (.NOSP <SET NOSP <>>)
(T <TELL " ">)>
<COND (<==? <SET WRD <GET .BEG 0>> ,W?PERIOD> <SET NOSP T>)
;(<==? .WRD ,W?MRS> <TELL "Mrs."> <SET PN T>)
;(<==? .WRD ,W?MS> <TELL "Ms."> <SET PN T>)
;(<==? .WRD ,W?MR> <TELL "Mr."> <SET PN T>)
;(<OR <EQUAL? .WRD YOUR-WORDS>
<EQUAL? .WRD ETC>>
<CAPITALIZE .BEG>
<SET PN T>)
(T
<COND (<AND .FIRST?? <NOT .PN> .CP>
<TELL "the ">)>
<COND (,P-OFLAG <PRINTB .WRD>)
(<AND <==? .WRD ,W?IT>
<==? ,P-IT-LOC ,HERE>>
<PRINTD ,P-IT-OBJECT>)
(T
<WORD-PRINT <GETB .BEG 2>
<GETB .BEG 3>>)>
<SET FIRST?? <>>)>)>
<SET BEG <REST .BEG ,P-WORDLEN>>>>
<ROUTINE CAPITALIZE (PTR)
<PRINTC <- <GETB ,P-INBUF <GETB .PTR 3>> 32>>
<WORD-PRINT <- <GETB .PTR 2> 1> <+ <GETB .PTR 3> 1>>>
<ROUTINE PREP-PRINT (PREP "AUX" WRD)
#DECL ((PREP) FIX)
<COND (<NOT <0? .PREP>>
<TELL " ">
<SET WRD <PREP-FIND .PREP>>
<COND ;(<==? .WRD ,W?AGAINST> <TELL "against">)
(T <PRINTB .WRD>)>)>>
<ROUTINE CLAUSE-COPY (BPTR EPTR "OPTIONAL" (INSRT <>) "AUX" BEG END)
#DECL ((BPTR EPTR) FIX (BEG END) <PRIMTYPE VECTOR>
(INSRT) <OR FALSE TABLE>)
<SET BEG <GET ,P-CCSRC .BPTR>>
<SET END <GET ,P-CCSRC .EPTR>>
<PUT ,P-OTBL
.BPTR
<REST ,P-OCLAUSE
<+ <* <GET ,P-OCLAUSE ,P-MATCHLEN> ,P-LEXELEN> 2>>>
<REPEAT ()
<COND (<==? .BEG .END>
<PUT ,P-OTBL
.EPTR
<REST ,P-OCLAUSE
<+ <* <GET ,P-OCLAUSE ,P-MATCHLEN> ,P-LEXELEN>
2>>>
<RETURN>)
(T
<COND (<AND .INSRT <==? ,P-ANAM <GET .BEG 0>>>
<CLAUSE-ADD .INSRT>)>
<CLAUSE-ADD <GET .BEG 0>>)>
<SET BEG <REST .BEG ,P-WORDLEN>>>>
<ROUTINE CLAUSE-ADD (WRD "AUX" PTR)
#DECL ((WRD) TABLE (PTR) FIX)
<SET PTR <+ <GET ,P-OCLAUSE ,P-MATCHLEN> 2>>
<PUT ,P-OCLAUSE <- .PTR 1> .WRD>
<PUT ,P-OCLAUSE .PTR 0>
<PUT ,P-OCLAUSE ,P-MATCHLEN .PTR>>
<ROUTINE PREP-FIND (PREP "AUX" (CNT 0) SIZE)
#DECL ((PREP CNT SIZE) FIX)
<SET SIZE <* <GET ,PREPOSITIONS 0> 2>>
<REPEAT ()
<COND (<IGRTR? CNT .SIZE> <RFALSE>)
(<==? <GET ,PREPOSITIONS .CNT> .PREP>
<RETURN <GET ,PREPOSITIONS <- .CNT 1>>>)>>>
<ROUTINE SYNTAX-FOUND (SYN)
#DECL ((SYN) <PRIMTYPE VECTOR>)
<SETG P-SYNTAX .SYN>
<SETG PRSA <GETB .SYN ,P-SACTION>>>
<GLOBAL P-GWIMBIT 0>
<ROUTINE GWIM (GBIT LBIT PREP "AUX" OBJ)
#DECL ((GBIT LBIT) FIX (OBJ) OBJECT)
<COND (<==? .GBIT ,RMUNGBIT>
<RETURN ,ROOMS>)>
<SETG P-GWIMBIT .GBIT>
<SETG P-SLOCBITS .LBIT>
<PUT ,P-MERGE ,P-MATCHLEN 0>
<COND (<GET-OBJECT ,P-MERGE <>>
<SETG P-GWIMBIT 0>
<COND (<==? <GET ,P-MERGE ,P-MATCHLEN> 1>
<SET OBJ <GET ,P-MERGE 1>>
<COND (<AND <FSET? .OBJ ,VEHBIT>
<EQUAL? .PREP ,PR?DOWN>>
<SET PREP ,PR?ON>)>
<TELL "(">
<COND (<NOT <0? .PREP>>
<PRINTB <PREP-FIND .PREP>>
<TELL " the ">)>
<TELL D .OBJ ")" CR>
.OBJ)>)
(T <SETG P-GWIMBIT 0> <RFALSE>)>>
<ROUTINE SNARF-OBJECTS ("AUX" PTR)
#DECL ((PTR) <OR FIX <PRIMTYPE VECTOR>>)
<COND (<NOT <==? <SET PTR <GET ,P-ITBL ,P-NC1>> 0>>
<SETG P-SLOCBITS <GETB ,P-SYNTAX ,P-SLOC1>>
<OR <SNARFEM .PTR <GET ,P-ITBL ,P-NC1L> ,P-PRSO> <RFALSE>>
<OR <0? <GET ,P-BUTS ,P-MATCHLEN>>
<SETG P-PRSO <BUT-MERGE ,P-PRSO>>>)>
<COND (<NOT <==? <SET PTR <GET ,P-ITBL ,P-NC2>> 0>>
<SETG P-SLOCBITS <GETB ,P-SYNTAX ,P-SLOC2>>
<OR <SNARFEM .PTR <GET ,P-ITBL ,P-NC2L> ,P-PRSI> <RFALSE>>
<COND (<NOT <0? <GET ,P-BUTS ,P-MATCHLEN>>>
<COND (<==? <GET ,P-PRSI ,P-MATCHLEN> 1>
<SETG P-PRSO <BUT-MERGE ,P-PRSO>>)
(T <SETG P-PRSI <BUT-MERGE ,P-PRSI>>)>)>)>
<RTRUE>>
<ROUTINE BUT-MERGE (TBL "AUX" LEN BUTLEN (CNT 1) (MATCHES 0) OBJ NTBL)
#DECL ((TBL NTBL) TABLE (LEN BUTLEN MATCHES) FIX (OBJ) OBJECT)
<SET LEN <GET .TBL ,P-MATCHLEN>>
<PUT ,P-MERGE ,P-MATCHLEN 0>
<REPEAT ()
<COND (<DLESS? LEN 0> <RETURN>)
(<ZMEMQ <SET OBJ <GET .TBL .CNT>> ,P-BUTS>)
(T
<PUT ,P-MERGE <+ .MATCHES 1> .OBJ>
<SET MATCHES <+ .MATCHES 1>>)>
<SET CNT <+ .CNT 1>>>
<PUT ,P-MERGE ,P-MATCHLEN .MATCHES>
<SET NTBL ,P-MERGE>
<SETG P-MERGE .TBL>
.NTBL>
<GLOBAL P-NAM <>>
<GLOBAL P-ADJ <>>
<GLOBAL P-ADJN <>>
<GLOBAL P-PRSO <ITABLE NONE 50>>
<GLOBAL P-PRSI <ITABLE NONE 50>>
<GLOBAL P-BUTS <ITABLE NONE 50>>
<GLOBAL P-MERGE <ITABLE NONE 50>>
<GLOBAL P-OCLAUSE <ITABLE NONE 50>>
<GLOBAL P-MATCHLEN 0>
<GLOBAL P-GETFLAGS 0>
<CONSTANT P-ALL 1>
<CONSTANT P-ONE 2>
<CONSTANT P-INHIBIT 4>
<GLOBAL P-CSPTR <>>
<GLOBAL P-CEPTR <>>
<ROUTINE SNARFEM (PTR EPTR TBL "AUX" (BUT <>) LEN WV WORD NW)
#DECL ((TBL) TABLE (PTR EPTR) <PRIMTYPE VECTOR> (ANDFLG) <OR ATOM FALSE>
(BUT) <OR FALSE TABLE> (WV) <OR FALSE FIX>)
<SETG P-GETFLAGS 0>
<SETG P-CSPTR .PTR>
<SETG P-CEPTR .EPTR>
<PUT ,P-BUTS ,P-MATCHLEN 0>
<PUT .TBL ,P-MATCHLEN 0>
<SET WORD <GET .PTR 0>>
<REPEAT ()
<COND (<==? .PTR .EPTR> <RETURN <GET-OBJECT <OR .BUT .TBL>>>)
(T
<SET NW <GET .PTR ,P-LEXELEN>>
<COND (<EQUAL? .WORD ,W?ALL>
<SETG P-GETFLAGS ,P-ALL>
<COND (<==? .NW ,W?OF>
<SET PTR <REST .PTR ,P-WORDLEN>>)>)
(<EQUAL? .WORD ,W?BUT ,W?EXCEPT>
<OR <GET-OBJECT <OR .BUT .TBL>> <RFALSE>>
<SET BUT ,P-BUTS>
<PUT .BUT ,P-MATCHLEN 0>)
(<EQUAL? .WORD ,W?A ,W?ONE>
<COND (<NOT ,P-ADJ>
<SETG P-GETFLAGS ,P-ONE>
<COND (<==? .NW ,W?OF>
<SET PTR <REST .PTR ,P-WORDLEN>>)>)
(T
<SETG P-NAM ,P-ONEOBJ>
<OR <GET-OBJECT <OR .BUT .TBL>> <RFALSE>>
<AND <0? .NW> <RTRUE>>)>)
(<AND <EQUAL? .WORD ,W?AND ,W?COMMA>
<NOT <EQUAL? .NW ,W?AND ,W?COMMA>>>
<OR <GET-OBJECT <OR .BUT .TBL>> <RFALSE>>
T)
(<AND <WT? .WORD ,PS?PREPOSITION>
<==? .PTR ,P-CSPTR>>
<SETG P-CSPTR <REST ,P-CSPTR ,P-WORDLEN>>)
(<WT? .WORD ,PS?BUZZ-WORD>)
(<EQUAL? .WORD ,W?AND ,W?COMMA>)
(<==? .WORD ,W?OF>
<COND (<0? ,P-GETFLAGS>
<SETG P-GETFLAGS ,P-INHIBIT>)>)
(<AND <SET WV <WT? .WORD ,PS?ADJECTIVE ,P1?ADJECTIVE>>
<ADJ-CHECK>>
;"Used to check for P-ADJ being <> as well"
<SETG P-ADJ .WV>
<SETG P-ADJN .WORD>
<SETG P-ADJECTIVE .WORD>)
(<WT? .WORD ,PS?OBJECT ,P1?OBJECT>
<SETG P-NAM .WORD>
<SETG P-ONEOBJ .WORD>)>)>
<COND (<NOT <==? .PTR .EPTR>>
<SET PTR <REST .PTR ,P-WORDLEN>>
<SET WORD .NW>)>>>
<ROUTINE ADJ-CHECK ()
<COND (<NOT ,P-ADJ> <RTRUE>)
(<OR <EQUAL? ,P-ADJ ,A?FIRST ,A?SECOND ,A?THIRD>
<EQUAL? ,P-ADJ ,A?FOURTH ,A?FIFTH ,A?SIXTH>
<EQUAL? ,P-ADJ ,A?SEVENTH ,A?EIGHTH ,A?NINTH>
<EQUAL? ,P-ADJ ,A?TENTH ,A?SMALL ,A?LARGE>
<EQUAL? ,P-ADJ ,A?INNER ,A?OUTER>>
<RFALSE>)
(T <RTRUE>)>>
<CONSTANT SH 128>
<CONSTANT SC 64>
<CONSTANT SIR 32>
<CONSTANT SOG 16>
<CONSTANT STAKE 8>
<CONSTANT SMANY 4>
<CONSTANT SHAVE 2>
<ROUTINE GET-OBJECT (TBL
"OPTIONAL" (VRB T)
"AUX" LEN XBITS TLEN (GCHECK <>) (OLEN 0))
#DECL ((TBL) TABLE (XBITS TLEN LEN) FIX (GWIM) <OR FALSE FIX>
(VRB GCHECK) <OR ATOM FALSE>)
<SET XBITS ,P-SLOCBITS>
<SET TLEN <GET .TBL ,P-MATCHLEN>>
<COND (<BTST ,P-GETFLAGS ,P-INHIBIT> <RTRUE>)>
<COND (<AND <NOT ,P-NAM> ,P-ADJ <WT? ,P-ADJN ,PS?OBJECT ,P1?OBJECT>>
<SETG P-NAM ,P-ADJN>
<SETG P-ADJECTIVE <>>
<SETG P-ADJ <>>)>
<COND (<AND <NOT ,P-NAM>
<NOT ,P-ADJ>
<NOT <==? ,P-GETFLAGS ,P-ALL>>
<0? ,P-GWIMBIT>>
<COND (.VRB
<TELL "I think that sentence was missing a noun." CR>)>
<RFALSE>)>
<COND (<OR <NOT <==? ,P-GETFLAGS ,P-ALL>> <0? ,P-SLOCBITS>>
<SETG P-SLOCBITS -1>)>
<SETG P-TABLE .TBL>
<PROG ()
<COND (.GCHECK <GLOBAL-CHECK .TBL>)
(T
<COND (,LIT <DO-SL ,HERE ,SOG ,SIR>)>
<DO-SL ,ADVENTURER ,SH ,SC>)>
<SET LEN <- <GET .TBL ,P-MATCHLEN> .TLEN>>
<COND (<BTST ,P-GETFLAGS ,P-ALL>)
(<AND <BTST ,P-GETFLAGS ,P-ONE>
<NOT <0? .LEN>>>
<COND (<NOT <==? .LEN 1>>
<PUT .TBL 1 <GET .TBL <RANDOM .LEN>>>
<TELL "(How about the ">
<PRINTD <GET .TBL 1>>
<TELL "?)" CR>)>
<PUT .TBL ,P-MATCHLEN 1>)
(<OR <G? .LEN 1>
<AND <0? .LEN> <NOT <==? ,P-SLOCBITS -1>>>>
<COND (<==? ,P-SLOCBITS -1>
<SETG P-SLOCBITS .XBITS>
<SET OLEN .LEN>
<PUT .TBL
,P-MATCHLEN
<- <GET .TBL ,P-MATCHLEN> .LEN>>
<AGAIN>)
(T
<COND (<0? .LEN> <SET LEN .OLEN>)>
<COND (<NOT <==? ,WINNER ,ADVENTURER>>
<CANT-ORPHAN>
<RFALSE>)
(<AND <==? ,P-NAM ,W?BUMP>
<==? ,P-NCN 2>
,P-NUMBER>
<PUT .TBL ,P-MATCHLEN 1>
<PUT .TBL 1 ,BUMP>
<RETURN>)
(<AND .VRB ,P-NAM>
<WHICH-PRINT .TLEN .LEN .TBL>
<SETG P-ACLAUSE
<COND (<==? .TBL ,P-PRSO> ,P-NC1)
(T ,P-NC2)>>
<SETG P-AADJ ,P-ADJ>
<SETG P-ANAM ,P-NAM>
<ORPHAN <> <>>
<SETG P-OFLAG T>)
(.VRB
<TELL "You must supply a noun!" CR>)>
<SETG P-NAM <>>
<SETG P-ADJ <>>
<RFALSE>)>)
(<AND <0? .LEN> .GCHECK>
<COND (.VRB
<COND (,LIT
<TELL "You can't see any">
<COND (,P-OFLAG
<COND (<AND ,P-ADJ ,P-NAM>
<TELL " such">)>
<COND (,P-NAM
<TELL " ">
<PRINTB ,P-NAM>)>)
(T
<BUFFER-PRINT ,P-CSPTR
,P-CEPTR
<>>)>
<TELL " here." CR>)
(T
<TELL "It's too dark to see." CR>)>)>
<SETG P-NAM <>>
<SETG P-ADJ <>>
<RFALSE>)
(<0? .LEN> <SET GCHECK T> <AGAIN>)>
<SETG P-ADJ <>>
<SETG P-NAM <>>
<SETG P-SLOCBITS .XBITS>
<RTRUE>>>
<ROUTINE WHICH-PRINT (TLEN LEN TBL "AUX" OBJ RLEN)
<SET RLEN .LEN>
<TELL "Which ">
<PRINTB ,P-NAM>
<COND (<EQUAL? ,P-NAM ,W?BUMP W?COLUMN>
<TELL " of the ten do you mean?" CR>
<RTRUE>)>
<TELL " do you mean, ">
<REPEAT ()
<SET TLEN <+ .TLEN 1>>
<SET OBJ <GET .TBL .TLEN>>
<TELL "the ">
<TELL D .OBJ>
<COND (<==? .LEN 2>
<COND (<NOT <==? .RLEN 2>> <TELL ",">)>