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parser.zil
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"PARSER for SEASTALKER
Copyright (C) 1984 Infocom, Inc. All rights reserved."
"
4/27/83 - SYNTAX-CHECK doesn't catch too-many-noun-clauses (MARC)
3/28/83 - GWIM prints XDESC, if any, for PERSON not yet touched. (SWG)
3/25/83 - Two additions to fix 'ACTOR, <non-verb>' doing the wrong
thing. Example: 'PHONG, WHY WERE YOU ...' (MARC)
3/16/83 - LINDER, HELP bug in which HELP was both noun and verb. (MARC)
"
"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-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"
<GLOBAL P-CONT <>>
<GLOBAL P-IT-OBJECT <>>
"<GLOBAL P-IT-LOC <>>"
<GLOBAL P-HER-OBJECT <>>
"<GLOBAL P-HER-LOC <>>"
<GLOBAL P-HIM-OBJECT <>>
"<GLOBAL P-HIM-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 <>>
<GLOBAL P-ADVERB <>>
<GLOBAL P-WHAT-IGNORED <>>
" 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."
<GLOBAL P-PROMPT 2>
<ROUTINE I-PROMPT-1 () <SETG P-PROMPT 1> <RFALSE>>
<ROUTINE I-PROMPT-2 ()
<COND (,P-PROMPT
<SETG P-PROMPT <>>
<TELL CR
"(Are you tired of seeing \"What next?\" Well, you won't see it
any more.)" CR>
<COND (<VERB? ;WAIT WAIT-FOR WAIT-UNTIL> <CRLF>)>
<DISABLE <INT I-PROMPT-2>>
<RFALSE>)>>
<ROUTINE PARSER ("AUX" (PTR ,P-LEXSTART) WRD (VAL 0) (VERB <>) (OF-FLAG <>)
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 -1>
<SETG P-NAM <>>
<SETG P-ADJ <>>
<SETG P-ADVERB <>>
<SETG P-MERGED <>>
<SETG P-WHAT-IGNORED <>>
<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 ,PLAYER>>
<SETG WINNER ,PLAYER>
<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 ,PLAYER>
<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>)
(T <CRLF>)>>
<COND (<AND ,P-PROMPT <NOT ,P-OFLAG>>
<COND (<EQUAL? ,P-PROMPT 2>
<TELL
"Okay, " FN ", what do you want to do now?">)
(T <TELL "What next?">)>
<CRLF>)>
<TELL ">">
<READ ,P-INBUF ,P-LEXV>)>
<SETG P-LEN <GETB ,P-LEXV ,P-LEXWORDS>>
<COND (<==? ,W?THEN <GET ,P-LEXV .PTR>> ;"Is THEN first input word?"
<SET PTR <+ .PTR ,P-LEXELEN>> ;"If so, ignore it."
<SETG P-LEN <- ,P-LEN 1>>)>
<COND (<AND <L? 1 ,P-LEN>
<==? ,W?GO <GET ,P-LEXV .PTR>> ;"Is GO first input word?"
<SET NW <GET ,P-LEXV <+ .PTR ,P-LEXELEN>>>
<WT? .NW ,PS?VERB ,P1?VERB> ;" followed by verb?">
<SET PTR <+ .PTR ,P-LEXELEN>> ;"If so, ignore it."
<SETG P-LEN <- ,P-LEN 1>>)>
<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>
<REPEAT ()
<COND (<L? <SETG P-LEN <- ,P-LEN 1>> 0>
<SETG QUOTE-FLAG <>>
<RETURN>)
(<BUZZER-WORD? <SET WRD <GET ,P-LEXV .PTR>>>
<RFALSE>)
(<OR .WRD
<SET WRD <NUMBER? .PTR>>
<SET WRD <NAME? .PTR>>>
<COND (<AND <==? .WRD ,W?TO>
<EQUAL? .VERB ,ACT?TELL ,ACT?ASK>>
<SET VERB ,ACT?TELL>
<SET WRD ,W?QUOTE>)
(<AND <==? .WRD ,W?THEN>
<NOT .VERB>>
<PUT ,P-ITBL ,P-VERB ,ACT?TELL>
<PUT ,P-ITBL ,P-VERBN 0>
<SET WRD ,W?QUOTE>)>
<COND ;(<AND <EQUAL? .WRD ,W?PERIOD>
<EQUAL? .LW ,W?MRS ,W?MR>>
<SET LW 0>)
(<OR <EQUAL? .WRD ,W?THEN ,W?PERIOD>
<EQUAL? .WRD ,W?QUOTE>>
<COND (<EQUAL? .WRD ,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? .WRD
,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>
<G? .LEN 2>>
<AND <EQUAL? .NW ,W?PERIOD>
<G? .LEN 1>>
<AND ,QUOTE-FLAG
<==? .LEN 2>
<EQUAL? .NW ,W?QUOTE>>
<AND <G? .LEN 2>
<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? .WRD ,PS?VERB ,P1?VERB>>
<OR <NOT .VERB>
<EQUAL? .VERB ,ACT?NAME>>>
<COND (<EQUAL? .VERB ,ACT?NAME>
<SETG P-WHAT-IGNORED T>)>
<SET VERB .VAL>
<PUT ,P-ITBL ,P-VERB .VAL>
<PUT ,P-ITBL ,P-VERBN ,P-VTBL>
<PUT ,P-VTBL 0 .WRD>
<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? .WRD ,PS?PREPOSITION 0>>
<AND <OR <EQUAL? .WRD ;,W?ALL ,W?ONE ,W?A>
<WT? .WRD ,PS?ADJECTIVE>
<WT? .WRD ,PS?OBJECT>>
;<SET VAL 0>>>
<COND (<AND <G? ,P-LEN 1 ;0>
<==? <GET ,P-LEXV
<+ .PTR ,P-LEXELEN>>
,W?OF>
<NOT <EQUAL? .VERB
,ACT?MAKE>>
<0? .VAL>
<NOT <EQUAL? .WRD
;,W?ALL ,W?ONE ,W?A>>>
<SET OF-FLAG T>)
(<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 .WRD>)>)
(<==? ,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 .WRD>>
<RFALSE>>
<COND (<L? .PTR 0>
<SETG QUOTE-FLAG <>>
<RETURN>)>)>)
(<==? .WRD ,W?CLOSELY>
<SETG P-ADVERB ,W?CAREFULLY>)
(<OR <EQUAL? .WRD
,W?CAREFULLY ,W?QUIETLY ,W?PRIVATELY>
<EQUAL? .WRD
,W?SLOWLY ,W?QUICKLY ,W?BRIEFLY>>
<SETG P-ADVERB .WRD>)
(<EQUAL? .WRD ,W?OF>
<COND (<OR <NOT .OF-FLAG>
<EQUAL?
<GET ,P-LEXV <+ .PTR ,P-LEXELEN>>
,W?PERIOD ,W?THEN>>
<CANT-USE .PTR>
<RFALSE>)
(T
<SET OF-FLAG <>>)>)
(<WT? .WRD ,PS?BUZZ-WORD>)
(T
<CANT-USE .PTR>
<RFALSE>)>)
(T
<UNKNOWN-WORD .PTR>
<RFALSE>)>
<SET LW .WRD>
<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" (OFFSET ,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 OFFSET <+ .OFFSET 1>>)>
<GETB .PTR .OFFSET>)>)>>
" Scan through a noun clause, leave a pointer to its starting location"
<ROUTINE CLAUSE (PTR VAL WRD "AUX" OFF NUM (ANDFLG <>) (FIRST?? T) NW (LW 0))
#DECL ((PTR VAL OFF NUM) FIX (WRD 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> .WRD>
<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 (<BUZZER-WORD? <SET WRD <GET ,P-LEXV .PTR>>>
<RFALSE>)
(<OR .WRD
<SET WRD <NUMBER? .PTR>>
<SET WRD <NAME? .PTR>>>
<COND (<0? ,P-LEN> <SET NW 0>)
(T <SET NW <GET ,P-LEXV <+ .PTR ,P-LEXELEN>>>)>
<COND (<AND <==? .WRD ,W?OF>
<EQUAL? <GET ,P-ITBL ,P-VERB> ,ACT?MAKE>>
<PUT ,P-LEXV .PTR ,W?WITH>
<SET WRD ,W?WITH>)>
<COND ;(<AND <EQUAL? .WRD ,W?PERIOD>
<EQUAL? .LW ,W?MRS ,W?MR>>
<SET LW 0>)
(<EQUAL? .WRD ,W?AND ,W?COMMA> <SET ANDFLG T>)
(<EQUAL? .WRD ;,W?ALL ,W?ONE>
<COND (<==? .NW ,W?OF>
<SETG P-LEN <- ,P-LEN 1>>
<SET PTR <+ .PTR ,P-LEXELEN>>)>)
(<OR <EQUAL? .WRD ,W?THEN ,W?PERIOD>
<AND <WT? .WRD ,PS?PREPOSITION>
<NOT .FIRST??>>>
<SETG P-LEN <+ ,P-LEN 1>>
<PUT ,P-ITBL
<+ .NUM 1>
<REST ,P-LEXV <* .PTR 2>>>
<RETURN <- .PTR ,P-LEXELEN>>)
;"3/16/83: This clause used to be later."
(<AND .ANDFLG
<OR ;"3/25/83: next statement added."
<EQUAL? <GET ,P-ITBL ,P-VERBN> 0>
<WT? .WRD ,PS?DIRECTION>
<WT? .WRD ,PS?VERB>>>
<SET PTR <- .PTR 4>>
<PUT ,P-LEXV <+ .PTR 2> ,W?THEN>
<SETG P-LEN <+ ,P-LEN 2>>)
(<WT? .WRD ,PS?OBJECT>
<COND (<AND <WT? .WRD
,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? .WRD ,PS?ADJECTIVE>
<WT? .WRD ,PS?BUZZ-WORD>>)
(<WT? .WRD ,PS?PREPOSITION> T)
(T
<CANT-USE .PTR>
<RFALSE>)>)
(T <UNKNOWN-WORD .PTR> <RFALSE>)>
<SET LW .WRD>
<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 %<ASCII !\:>>
<SET TIM .SUM>
<SET SUM 0>)
(<G? .SUM 9999> <RFALSE>)
(<OR <G? .CHR %<ASCII !\9>>
<L? .CHR %<ASCII !\0>>>
<RFALSE>)
(T
<SET SUM <+ <* .SUM 10>
<- .CHR %<ASCII !\0>>>>)>
<SET BPTR <+ .BPTR 1>>)>>
<PUT ,P-LEXV .PTR ,W?NUMBER>
<COND (<G? .SUM 9999> <RFALSE>)
(.TIM
<COND (<G? .TIM 23> <RFALSE>)
(<G? .TIM 19> T)
(<G? .TIM 12> <RFALSE>)
(<G? .TIM 7> T)
(T <SET TIM <+ 12 .TIM>>)>
<SET SUM <+ .SUM <* .TIM 60>>>)>
<SETG P-NUMBER .SUM>
,W?NUMBER>
<GLOBAL P-NUMBER -1>
<GLOBAL P-DIRECTION 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>>
<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>>
<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)
<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)
#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>>
<SETG QUOTE-FLAG <>>
<SETG P-OFLAG <>>
<TELL "\".)" CR>>
<ROUTINE CANT-USE (PTR "AUX" BUF)
#DECL ((PTR BUF) FIX)
<TELL "(Sorry, but I don't understand the word \"">
<WORD-PRINT <GETB <REST ,P-LEXV <SET BUF <* .PTR 2>>> 2>
<GETB <REST ,P-LEXV .BUF> 3>>
<TELL "\" when you use it that way.)" 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)
#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>>>
<MISSING-VERB>
<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) ;"Added 4/27/83"
(<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
"(Sorry, but I don't understand. Please reword that or try something else.)"
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 ,ACT?NAME>
<TELL "(Sorry, but I can't answer that question.)" CR>
<RFALSE>)
(T
<COND (<EQUAL? ,WINNER ,PLAYER>
<ORPHAN .DRIVE1 .DRIVE2>
<TELL "(Wh"
<COND (<EQUAL? .VERB ,ACT?WALK> "ere")
(T "at")>
" do you want to ">)
(T
<TELL
"(Your command was not complete. Next time, type wh"
<COND (<EQUAL? .VERB ,ACT?WALK> "ere") (T "at")>
" you want " D ,WINNER " to ">)>
<VERB-PRINT>
<COND (.DRIVE2
<CLAUSE-PRINT ,P-NC1 ,P-NC1L>)>
<PREP-PRINT <COND (.DRIVE1 <GETB .DRIVE1 ,P-SPREP1>)
(T <GETB .DRIVE2 ,P-SPREP2>)>>
<COND (<EQUAL? ,WINNER ,PLAYER>
<SETG P-OFLAG T>
<TELL "?)" CR>)
(T
<SETG P-OFLAG <>>
<TELL ".)" CR>)>
<RFALSE>)>>
<ROUTINE VERB-PRINT ("AUX" TMP)
<SET TMP <GET ,P-ITBL ,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>)>>
<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 "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 <>))
#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?DR> <TELL "Dr."> <SET PN T>)
(<EQUAL? .WRD ,W?HIM ,W?HER ,W?ME> <SET PN T>)
(<CAPITAL-NOUN? .WRD>
<CAPITALIZE .BEG>
<SET PN T>)
(T
<COND (<AND .FIRST?? <NOT .PN> .CP>
<TELL "the ">)>
<COND (<OR ,P-OFLAG ,P-MERGED> <PRINTB .WRD>)
(<AND <==? .WRD ,W?IT>
<VISIBLE? ,P-IT-OBJECT>>
<PRINTD ,P-IT-OBJECT>)
(<AND <EQUAL? .WRD ,W?HER>
<VISIBLE? ,P-HER-OBJECT>>
<PRINTD ,P-HER-OBJECT>)
(<AND <EQUAL? .WRD ,W?HIM>
<VISIBLE? ,P-HIM-OBJECT>>
<PRINTD ,P-HIM-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 "OPTIONAL" (SP? T) "AUX" WRD)
#DECL ((PREP) FIX)
<COND (<NOT <0? .PREP>>
<COND (.SP? <TELL " ">)>
<SET WRD <PREP-FIND .PREP>>
<COND (<==? .WRD ,W?AGAINST> <TELL "against">)
(<==? .WRD ,W?THROUGH> <TELL "through">)
(T <PRINTB .WRD>)>
<COND (<AND <==? ,W?SIT <GET <GET ,P-ITBL ,P-VERBN> 0>>
<==? ,W?DOWN .WRD>>
<TELL " on">)>
<COND (<AND <==? ,W?GET <GET <GET ,P-ITBL ,P-VERBN> 0>>
<==? ,W?OUT .WRD>> ;"Will it ever work? --SWG"
<TELL " of">)>
<RTRUE>)>>
<ROUTINE CLAUSE-COPY (BPTR EPTR "OPTIONAL" (INSERT <>) "AUX" BEG END)
#DECL ((BPTR EPTR) FIX (BEG END) <PRIMTYPE VECTOR>
(INSERT) <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 .INSERT <==? ,P-ANAM <GET .BEG 0>>>
<CLAUSE-ADD .INSERT>)>
<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 WPREP)
#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>>
<TELL "(">
<COND (<PREP-PRINT .PREP <>> ;<NOT <0? .PREP>>
;<SET WPREP <PREP-FIND .PREP>>
;<PRINTB .WPREP>
;<COND (<AND <VERB? DISEMBARK>
<EQUAL? .WPREP ,W?OUT>>
<TELL " of">)>
<THE? .OBJ>
<TELL " ">)>
<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-XNAM <>>
<GLOBAL P-ADJ <>>
<GLOBAL P-XADJ <>>
<GLOBAL P-ADJN <>>
<GLOBAL P-XADJN <>>
<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 <>>
<ROUTINE SNARFEM (PTR EPTR TBL "AUX" (BUT <>) LEN WV WRD NW)
<SETG P-AND <>>
<SETG P-GETFLAGS 0>
<SETG P-CSPTR .PTR>
<SETG P-CEPTR .EPTR>
<PUT ,P-BUTS ,P-MATCHLEN 0>
<PUT .TBL ,P-MATCHLEN 0>
<SET WRD <GET .PTR 0>>
<REPEAT ()
<COND (<==? .PTR .EPTR> <RETURN <GET-OBJECT <OR .BUT .TBL>>>)
(T
<SET NW <GET .PTR ,P-LEXELEN>>
<COND ;(<==? .WRD ,W?ALL>
<SETG P-GETFLAGS ,P-ALL>
<COND (<==? .NW ,W?OF>
<SET PTR <REST .PTR ,P-WORDLEN>>)>)
;(<EQUAL? .WRD ,W?BUT ,W?EXCEPT>
<OR <GET-OBJECT <OR .BUT .TBL>> <RFALSE>>
<SET BUT ,P-BUTS>
<PUT .BUT ,P-MATCHLEN 0>)
(<BUZZER-WORD? .WRD>
<RFALSE>)
(<EQUAL? .WRD ,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? .WRD ,W?AND ,W?COMMA>
<NOT <EQUAL? .NW ,W?AND ,W?COMMA>>>
<SETG P-AND T>
<OR <GET-OBJECT <OR .BUT .TBL>> <RFALSE>>
T)
(<WT? .WRD ,PS?BUZZ-WORD>)
(<EQUAL? .WRD ,W?AND ,W?COMMA>)
(<==? .WRD ,W?OF>
<COND (<0? ,P-GETFLAGS>
<SETG P-GETFLAGS ,P-INHIBIT>)>)
(<AND <SET WV <WT? .WRD ,PS?ADJECTIVE ,P1?ADJECTIVE>>
<NOT ,P-ADJ>>
<SETG P-ADJ .WV>
<SETG P-ADJN .WRD>)
(<WT? .WRD ,PS?OBJECT ,P1?OBJECT>
<SETG P-NAM .WRD>
<SETG P-ONEOBJ .WRD>)>)>
<COND (<NOT <==? .PTR .EPTR>>
<SET PTR <REST .PTR ,P-WORDLEN>>
<SET WRD .NW>)>>>
<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" BTS LEN XBITS TLEN (GCHECK <>) (OLEN 0) OBJ ADJ)
#DECL ((TBL) TABLE (XBITS BTS TLEN LEN) FIX (GWIM) <OR FALSE FIX>
(VRB GCHECK) <OR ATOM FALSE>)
<SET XBITS ,P-SLOCBITS>
<SET TLEN <GET .TBL ,P-MATCHLEN>>
;<COND (,DEBUG <TELL "[GETOBJ: TLEN=" N .TLEN "]" CR>)>
<COND (<BTST ,P-GETFLAGS ,P-INHIBIT> <RTRUE>)>
<SET ADJ ,P-ADJN>
<COND (<AND <NOT ,P-NAM> ,P-ADJ>
<COND (<WT? ,P-ADJN ,PS?OBJECT ,P1?OBJECT>
<SETG P-NAM ,P-ADJN>
<SETG P-ADJ <>>)
(<SET BTS <WT? ,P-ADJN ,PS?DIRECTION ,P1?DIRECTION>>
<SETG P-ADJ <>>
<PUT .TBL ,P-MATCHLEN 1>
<PUT .TBL 1 ,INTDIR>
<SETG P-DIRECTION .BTS>
<RTRUE>)>)>
<COND (<AND <NOT ,P-NAM>
<NOT ,P-ADJ>
<NOT <==? ,P-GETFLAGS ,P-ALL>>
<0? ,P-GWIMBIT>>
<COND (.VRB <MISSING-NOUN .ADJ>)>
<RFALSE>)>
<COND (<OR <NOT <==? ,P-GETFLAGS ,P-ALL>> <0? ,P-SLOCBITS>>
<SETG P-SLOCBITS -1>)>
<SETG P-TABLE .TBL>
<PROG ()
;<COND (,DEBUG <TELL "[GETOBJ: GCHECK=" N .GCHECK "]" CR>)>
<COND (.GCHECK
;<COND (,DEBUG <TELL "[GETOBJ: calling GLOBAL-CHECK]" CR>)>
<GLOBAL-CHECK .TBL>)
(T
<COND (,LIT
<FCLEAR ,PLAYER ,TRANSBIT>
<DO-SL ,HERE ,SOG ,SIR>
<FSET ,PLAYER ,TRANSBIT>)>