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parser.zil
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"PARSER for
PLANETFALL
(c) Copyright 1983 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 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 80>>
<GLOBAL P-CONT <>>
<GLOBAL P-IT-OBJECT <>>
<GLOBAL P-IT-LOC <>>
<GLOBAL LAST-PSEUDO-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 <>>
" 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 <>> ;"Removed 7/3"
<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 (<AND <NOT <VERB? TELL>>
<NOT ,SUPER-BRIEF>>
<CRLF>)>)
(T
<SETG WINNER ,ADVENTURER>
<SETG QUOTE-FLAG <>>
<COND (<NOT <FSET? <LOC ,WINNER> ,VEHBIT>>
<SETG HERE <LOC ,WINNER>>)>
<SET SCNT ,P-SPACE>
<REPEAT ()
<COND (<L? <SET SCNT <- .SCNT 1>> 0>
<RETURN>)
(<NOT ,SUPER-BRIEF>
<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>
<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>
<NOT ,QUOTE-FLAG> ;"Added 7/3 by MARC">
<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>
<EQUAL? .WORD ,W?BOTH>
<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>>
<NOT <EQUAL? .WORD ,W?BOTH>>>)
(<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>)
(<AND <EQUAL? .VERB ,ACT?TELL>
<WT? .WORD ,PS?VERB ,P1?VERB>>
<TELL
"Please consult your manual for the correct way to talk to other people
or creatures." CR>
<RFALSE>)
(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> <MANY-CHECK> <TAKE-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>)
(<EQUAL? .BIT ,PS?OBJECT> 1)
(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))
<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?BOTH ,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>>)
(<WT? .WORD ,PS?OBJECT>
<COND (<AND <G? ,P-LEN 0>
<EQUAL? .NW ,W?OF>
<NOT <EQUAL? .WORD ,W?ALL ,W?ONE>>>
T)
(<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 <>>)>)
(<AND <OR ,P-OFLAG
,P-MERGED
<NOT <EQUAL? <GET ,P-ITBL ,P-VERB> 0>>>
<OR <WT? .WORD ,PS?ADJECTIVE>
<WT? .WORD ,PS?BUZZ-WORD>>>)
(<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?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 (<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 10000> <RFALSE>)>
<SETG P-NUMBER .SUM>
,W?INTNUM>
<GLOBAL P-NUMBER 0>
<ROUTINE ORPHAN-MERGE ("AUX" (CNT -1) TEMP VERB BEG END (ADJ <>) WRD)
<SETG P-OFLAG <>>
<COND (<WT? <SET WRD <GET <GET ,P-ITBL ,P-VERBN> 0>>
,PS?ADJECTIVE ,P1?ADJECTIVE>
<SET ADJ T>)
;"Following clause is retrofix #30, which handles case where one-word
response is both noun and verb. -JW 8/20/84"
(<AND <WT? .WRD ,PS?OBJECT ,P1?OBJECT>
<EQUAL? ,P-NCN 0>>
<PUT ,P-ITBL ,P-VERB 0>
<PUT ,P-ITBL ,P-VERBN 0>
<PUT ,P-ITBL ,P-NC1 <REST ,P-LEXV 2>>
<PUT ,P-ITBL ,P-NC1L <REST ,P-LEXV 6>>
<SETG P-NCN 1>)>
<COND (<AND <NOT <0? <SET VERB <GET ,P-ITBL ,P-VERB>>>>
<NOT .ADJ>
<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>>
<COND (.ADJ
<PUT ,P-OTBL ,P-NC1 <REST ,P-LEXV 2>>
<PUT ,P-OTBL ,P-NC1L <REST ,P-LEXV 6>>)
(T
<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>>
<COND (.ADJ
<PUT ,P-ITBL ,P-NC1 <REST ,P-LEXV 2>>
<PUT ,P-ITBL ,P-NC1L <REST ,P-LEXV 6>>)>
<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>)>)
(<NOT <ZERO? ,P-ACLAUSE>>
<COND (<AND <NOT <==? ,P-NCN 1>> <NOT .ADJ>>
<SETG P-ACLAUSE <>>
<RFALSE>)
(T
<SET BEG <GET ,P-ITBL ,P-NC1>>
<COND (.ADJ <SET BEG <REST ,P-LEXV 2>> <SET ADJ <>>)>
<SET END <GET ,P-ITBL ,P-NC1L>>
<REPEAT ()
<SET WRD <GET .BEG 0>>
<COND (<==? .BEG .END>
<COND (.ADJ <ACLAUSE-WIN .ADJ> <RETURN>)
(T <SETG P-ACLAUSE <>> <RFALSE>)>)
(<AND <NOT .ADJ>
<OR <BTST <GETB .WRD ,P-PSOFF>
,PS?ADJECTIVE>
<EQUAL? .WRD ,W?ALL ,W?ONE>>>
<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>>
<COND (<EQUAL? .END 0>
<SET END .BEG>
<SETG P-NCN 1>
<PUT ,P-ITBL ,P-NC1 <BACK .BEG 4>>
<PUT ,P-ITBL ,P-NC1L .BEG>)>>)>)>
<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) ;"TRAP retrofix"
<PUT ,P-ITBL ,P-VERB <GET ,P-OTBL ,P-VERB>>
<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)
<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)
<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)
<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 (<G? ,P-NCN .NUM> T)
(<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 "\"I don't understand! What are you referring to?\"" CR>
<RFALSE>>
<ROUTINE ORPHAN (D1 D2 "AUX" (CNT -1))
<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 "OPTIONAL" (THE? T))
<BUFFER-PRINT <GET ,P-ITBL .BPTR> <GET ,P-ITBL .EPTR> .THE?>>
<ROUTINE BUFFER-PRINT (BEG END CP "AUX" (NOSP <>) WRD (FIRST?? T) (PN <>))
<REPEAT ()
<COND (<==? .BEG .END>
<RETURN>)
(T
<COND (.NOSP
<SET NOSP <>>)
(T
<TELL " ">)>
<COND (<==? <SET WRD <GET .BEG 0>> ,W?PERIOD>
<SET NOSP T>)
(<EQUAL? .WRD ,W?FLOYD ,W?BLATHER>
<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)
<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)
<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)
<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)
<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)
<SETG P-SYNTAX .SYN>
<SETG PRSA <GETB .SYN ,P-SACTION>>>
<GLOBAL P-GWIMBIT 0>
<ROUTINE GWIM (GBIT LBIT PREP "AUX" OBJ)
<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)
<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)
<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 <>>
<GLOBAL P-AND <>> ;"WHICH retrofix"
<ROUTINE SNARFEM (PTR EPTR TBL "AUX" (BUT <>) LEN WV WORD NW)
<SETG P-AND <>> ;"WHICH retrofix"
<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 ,W?BOTH>
<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>>>
<SETG P-AND T> ;"WHICH retrofix"
<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?OLD ,A?NEW>
<EQUAL? ,P-ADJ ,A?SEND ,A?RECEIVE ,A?KITCHEN>
<EQUAL? ,P-ADJ ,A?UPPER ,A?LOWER ,A?SHUTTL>
<EQUAL? ,P-ADJ ,A?ELEVATOR>
<EQUAL? ,P-ADJ ,A?SQUARE ,A?ROUND ,A?GOOD>
<EQUAL? ,P-ADJ ,A?SHINY ,A?CRACKED ,A?FRIED>
<EQUAL? ,P-ADJ ,A?TELEPO ,A?MINI ,A?MINIAT>>
<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" BITS LEN XBITS TLEN (GCHECK <>) (OLEN 0) OBJ)
<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-ADJ <>>)>
<COND (<AND <NOT ,P-NAM>
<NOT ,P-ADJ>
<NOT <==? ,P-GETFLAGS ,P-ALL>>
<0? ,P-GWIMBIT>>
<COND (.VRB
<TELL "I couldn't find a noun in that sentence!" 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
<COND (<NOT <EQUAL? ,WINNER ,ADVENTURER>>
<FCLEAR ,WINNER ,OPENBIT>)>
<DO-SL ,HERE ,SOG ,SIR>
<COND (<NOT <EQUAL? ,WINNER ,ADVENTURER>>
<FSET ,WINNER ,OPENBIT>)>)>
<DO-SL ,WINNER ,SH ,SC>
<COND (<AND <NOT <EQUAL? ,WINNER ,ADVENTURER>>
<NOT <EQUAL? ,P-GETFLAGS ,P-ALL>>>
<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 .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 "I couldn't find a noun in that sentence!" CR>)>
<SETG P-NAM <>>
<SETG P-ADJ <>>
<RFALSE>)>)
(<AND <0? .LEN> .GCHECK>
<COND (.VRB
<SETG P-SLOCBITS .XBITS>
<COND (<OR ,LIT
<EQUAL? ,P-NAM ,W?GRUE>>
;"Changed 6/10/83 - MARC"
<OBJ-FOUND ,NOT-HERE-OBJECT .TBL>
<SETG P-XNAM ,P-NAM>
<SETG P-XADJ ,P-ADJ>
<SETG P-XADJN ,P-ADJN>
<SETG P-NAM <>>
<SETG P-ADJ <>>
<SETG P-ADJN <>>
<RTRUE>)
(T
<TELL "It's too dark to see!" CR>)>)>
<SETG P-NAM <>>
<SETG P-ADJ <>>
<RFALSE>)
(<0? .LEN> <SET GCHECK T> <AGAIN>)>
<SETG P-SLOCBITS .XBITS>
<SETG P-NAM <>>
<SETG P-ADJ <>>
<RTRUE>>>
<ROUTINE MOBY-FIND (TBL "AUX" FOO LEN)
<SETG P-SLOCBITS -1>
<SETG P-NAM ,P-XNAM>
<SETG P-ADJ ,P-XADJ>
<PUT .TBL ,P-MATCHLEN 0>
<SET FOO <FIRST? ,ROOMS>>
<REPEAT ()
<COND (<NOT .FOO> <RETURN>)
(T
<SEARCH-LIST .FOO .TBL ,P-SRCALL>
<SET FOO <NEXT? .FOO>>)>>
<COND (<EQUAL? <SET LEN <GET .TBL ,P-MATCHLEN>> 0>
<DO-SL ,LOCAL-GLOBALS 1 1>)>
<COND (<EQUAL? <SET LEN <GET .TBL ,P-MATCHLEN>> 0>
<DO-SL ,ROOMS 1 1>)>
<COND (<EQUAL? <SET LEN <GET .TBL ,P-MATCHLEN>> 1>
<SETG P-MOBY-FOUND <GET .TBL 1>>)>
<SETG P-NAM <>>
<SETG P-ADJ <>>