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parserm.h
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! ==============================================================================
! PARSERM: Core of parser.
!
! Supplied for use with Inform 6 -- Release 6/12 -- Serial number 140801
!
! Copyright Graham Nelson 1993-2004 and David Griffith 2012-2014
!
! This code is licensed under either the traditional Inform license as
! described by the DM4 or the Artistic License version 2.0. See the
! file COPYING in the distribution archive or at
! https://github.com/DavidGriffith/inform6lib/
!
! This file is automatically Included in your game file by "Parser".
! ------------------------------------------------------------------------------
! Inclusion of "linklpa" (which defines properties and attributes)
! Global variables, constants and arrays
! 1: outside of the parser
! 2: used within the parser
! Inclusion of natural language definition file
! (which creates a compass and direction-objects)
! Darkness and player objects
! Definition of grammar token numbering system used by Inform
!
! The InformParser object
! keyboard reading
! level 0: outer shell, conversation, errors
! 1: grammar lines
! 2: tokens
! 3: object lists
! 4: scope and ambiguity resolving
! 5: object comparisons
! 6: word comparisons
! 7: reading words and moving tables about
! pronoun management
!
! The InformLibrary object
! main game loop
! action processing
! end of turn sequence
! scope looping, before/after sequence, sending messages out
! timers, daemons, time of day, score notification
! light and darkness
! changing player personality
! tracing code (only present if DEBUG is set)
!
! Status line printing, menu display
! Printing object names with articles
! Miscellaneous utility routines
! Game banner, "version" verb, run-time errors
! ==============================================================================
System_file;
#Ifdef MODULE_MODE;
Constant DEBUG;
Constant Grammar__Version 2;
Include "linklpa";
#Endif; ! MODULE_MODE
#Ifdef COLOR;
Constant COLOUR;
#Endif;
#Ifdef COLOUR;
Global clr_on = 1;
#Ifnot;
Global clr_on = 0;
#Endif;
! ------------------------------------------------------------------------------
! Global variables and their associated Constant and Array declarations
! ------------------------------------------------------------------------------
Global location = InformLibrary; ! Must be first global defined
Global sline1; ! Must be second
Global sline2; ! Must be third
! (for status line display)
! ------------------------------------------------------------------------------
! Z-Machine and interpreter issues
! ------------------------------------------------------------------------------
#Ifdef TARGET_ZCODE;
Global top_object; ! Largest valid number of any tree object
! ### these globals are not meaningful... well, maybe standard_interpreter,
! but I'll decide that later (AP).
Constant INDIV_PROP_START 64; ! Equivalent of a Glulx constant
#Endif; ! TARGET_ZCODE
Global standard_interpreter; ! The version number of the Z-Machine Standard which the
! interpreter claims to support, in form (upper byte).(lower)
Global undo_flag; ! Can the interpreter provide "undo"?
Global just_undone; ! Can't have two successive UNDOs
Global transcript_mode; ! true when game scripting is on
#Ifdef TARGET_ZCODE;
Global xcommsdir; ! true if command recording is on
#Endif; ! TARGET_ZCODE
#Ifdef TARGET_GLULX;
Constant GG_MAINWIN_ROCK 201;
Constant GG_STATUSWIN_ROCK 202;
Constant GG_QUOTEWIN_ROCK 203;
Constant GG_SAVESTR_ROCK 301;
Constant GG_SCRIPTSTR_ROCK 302;
Constant GG_COMMANDWSTR_ROCK 303;
Constant GG_COMMANDRSTR_ROCK 304;
Constant GG_SCRIPTFREF_ROCK 401;
Array gg_event --> 4;
#Ifdef VN_1630;
Array gg_arguments buffer 28;
#Ifnot;
Array gg_arguments --> 8;
#Endif; ! VN_
Global gg_mainwin = 0;
Global gg_statuswin = 0;
Global gg_quotewin = 0;
Global gg_scriptfref = 0;
Global gg_scriptstr = 0;
Global gg_savestr = 0;
Global gg_commandstr = 0;
Global gg_command_reading = 0; ! true if gg_commandstr is being replayed
#Endif; ! TARGET_GLULX
Global gg_statuswin_cursize = 0;
Global gg_statuswin_size = 1;
! ------------------------------------------------------------------------------
! Time and score
! (for linkage reasons, the task_* arrays are created not here but in verblib.h)
! ------------------------------------------------------------------------------
#Ifndef sys_statusline_flag;
Global sys_statusline_flag = 0; ! non-zero if status line displays time
#Endif;
#Ifndef START_MOVE;
Constant START_MOVE 0; ! Traditionally 0 for Infocom, 1 for Inform
#Endif;
Global turns = START_MOVE; ! Number of turns of play so far
Global the_time = NULL; ! Current time (in minutes since midnight)
Global time_rate = 1; ! How often time is updated
Global time_step; ! By how much
#Ifndef MAX_TIMERS;
Constant MAX_TIMERS 32; ! Max number timers/daemons active at once
#Endif; ! MAX_TIMERS
Array the_timers --> MAX_TIMERS;
Global active_timers; ! Number of timers/daemons actives
Global score; ! The current score
Global last_score; ! Score last turn (for testing for changes)
Global notify_mode = true; ! Score notification
Global places_score; ! Contribution to score made by visiting
Global things_score; ! Contribution made by acquisition
! ------------------------------------------------------------------------------
! The player
! ------------------------------------------------------------------------------
Global player; ! Which object the human is playing through
Global deadflag; ! Normally 0, or false; 1 for dead
! 2 for victorious, and higher numbers
! represent exotic forms of death
! ------------------------------------------------------------------------------
! Light and room descriptions
! ------------------------------------------------------------------------------
Global lightflag = true; ! Is there currently light to see by?
Global real_location; ! When in darkness, location = thedark
! and this holds the real location
Global prev_location; ! The previous value of real_location
Global visibility_ceiling; ! Highest object in tree visible from the
! player's point of view (usually the room,
! sometimes darkness, sometimes a closed
! non-transparent container).
Global lookmode = 2; ! 1=brief, 2=verbose, 3=superbrief
! room descriptions
Global print_player_flag; ! If set, print something like "(as Fred)"
! in room descriptions, to reveal whom the
! player is playing through
Global lastdesc; ! Value of location at time of most recent
! room description printed out
! ------------------------------------------------------------------------------
! List writing (style bits are defined as Constants in "verblibm.h")
! ------------------------------------------------------------------------------
Global c_style; ! Current list-writer style
Global lt_value; ! Common value of list_together
Global listing_together; ! Object number of one member of a group
! being listed together
Global listing_size; ! Size of such a group
Global wlf_indent; ! Current level of indentation printed by
! WriteListFrom()
Global inventory_stage = 1; ! 1 or 2 according to the context in which
! "invent" routines of objects are called
Global inventory_style; ! List-writer style currently used while
! printing inventories
! ------------------------------------------------------------------------------
! Menus and printing
! ------------------------------------------------------------------------------
Global pretty_flag = true; ! Use character graphics, or plain text?
Global menu_nesting; ! Level of nesting (0 = root menu)
Global menu_item; ! These are used in communicating
Global item_width = 8; ! with the menu-creating routines
Global item_name = "---";
Global lm_n; ! Parameters used by LibraryMessages
Global lm_o; ! mechanism
Global lm_s;
#Ifdef DEBUG;
Constant DEBUG_MESSAGES $0001;
Constant DEBUG_ACTIONS $0002;
Constant DEBUG_TIMERS $0004;
Constant DEBUG_CHANGES $0008;
Constant DEBUG_VERBOSE $0080;
Global debug_flag; ! Bitmap of flags for tracing actions,
! calls to object routines, etc.
Global x_scope_count; ! Used in printing a list of everything
#Endif; ! DEBUG ! in scope
! five for colour control
! see http://www.inform-fiction.org/patches/L61007.html
! To enable colour define a constant or Global: COLOR or COLOUR
!Global clr_on; ! has colour been enabled by the player?
#Ifdef COLOUR;
Global clr_fg = 1; ! foreground colour
Global clr_bg = 1; ! background colour
Global clr_fgstatus = 1; ! foreground colour of statusline
Global clr_bgstatus = 1; ! background colour of statusline
#Endif; ! COLOUR
Global statuswin_current; ! if writing to top window
Constant CLR_CURRENT 0;
Constant CLR_DEFAULT 1;
Constant CLR_BLACK 2;
Constant CLR_RED 3;
Constant CLR_GREEN 4;
Constant CLR_YELLOW 5;
Constant CLR_BLUE 6;
Constant CLR_MAGENTA 7;
Constant CLR_CYAN 8;
Constant CLR_WHITE 9;
Constant CLR_PURPLE 7;
Constant CLR_AZURE 8;
Constant WIN_ALL 0;
Constant WIN_STATUS 1;
Constant WIN_MAIN 2;
! ------------------------------------------------------------------------------
! Action processing
! ------------------------------------------------------------------------------
Global action; ! Action currently being asked to perform
Global inp1; ! 0 (nothing), 1 (number) or first noun
Global inp2; ! 0 (nothing), 1 (number) or second noun
Global noun; ! First noun or numerical value
Global second; ! Second noun or numerical value
Global keep_silent; ! If true, attempt to perform the action
! silently (e.g. for implicit takes,
! implicit opening of unlocked doors)
Global reason_code; ! Reason for calling a "life" rule
! (an action or fake such as ##Kiss)
Global receive_action; ! Either ##PutOn or ##Insert, whichever is
! action being tried when an object's
! "before" rule is checking "Receive"
Global no_implicit_actions; ! Don't implicitly do things.
! ==============================================================================
! Parser variables: first, for communication to the parser
! ------------------------------------------------------------------------------
Global parser_trace = 0; ! Set this to 1 to make the parser trace
! tokens and lines
Global parser_action; ! For the use of the parser when calling
Global parser_one; ! user-supplied routines
Global parser_two; !
Array inputobjs --> 16; ! For parser to write its results in
Global parser_inflection; ! A property (usually "name") to find
! object names in
Global parser_inflection_func; ! Programmer sets this to true when
! parser_infection is a function
! ------------------------------------------------------------------------------
! Parser output
! ------------------------------------------------------------------------------
Global actor; ! Person asked to do something
Global actors_location; ! Like location, but for the actor
Global meta; ! Verb is a meta-command (such as "save")
#Ifdef INFIX;
Global infix_verb; ! Verb is an Infix command
#Endif;
Array multiple_object --> 64; ! List of multiple parameters
Global multiflag; ! Multiple-object flag passed to actions
! Also used to prevent misleading MULTI_PE
Global toomany_flag; ! Flag for "multiple match too large"
! (e.g. if "take all" took over 100 things)
Global special_word; ! Dictionary address for "special" token
Global special_number; ! Number typed for "special" token
Global parsed_number; ! For user-supplied parsing routines
Global consult_from; ! Word that a "consult" topic starts on
Global consult_words; ! ...and number of words in topic
Global asking_player; ! True during disambiguation question
! ------------------------------------------------------------------------------
! Implicit taking
! ------------------------------------------------------------------------------
Global notheld_mode; ! To do with implicit taking
Global onotheld_mode; ! "old copy of notheld_mode", ditto
Global not_holding; ! Object to be automatically taken as an
! implicit command
Array kept_results --> 16; ! Delayed command (while the take happens)
! ------------------------------------------------------------------------------
! Error numbers when parsing a grammar line
! ------------------------------------------------------------------------------
Global etype; ! Error number on current line
Global best_etype; ! Preferred error number so far
Global nextbest_etype; ! Preferred one, if ASKSCOPE_PE disallowed
Constant STUCK_PE = 1;
Constant UPTO_PE = 2;
Constant NUMBER_PE = 3;
Constant CANTSEE_PE = 4;
Constant TOOLIT_PE = 5;
Constant NOTHELD_PE = 6;
Constant MULTI_PE = 7;
Constant MMULTI_PE = 8;
Constant VAGUE_PE = 9;
Constant EXCEPT_PE = 10;
Constant ANIMA_PE = 11;
Constant VERB_PE = 12;
Constant SCENERY_PE = 13;
Constant ITGONE_PE = 14;
Constant JUNKAFTER_PE = 15;
Constant TOOFEW_PE = 16;
Constant NOTHING_PE = 17;
Constant ASKSCOPE_PE = 18;
! ------------------------------------------------------------------------------
! Pattern-matching against a single grammar line
! ------------------------------------------------------------------------------
Array pattern --> 32; ! For the current pattern match
Global pcount; ! and a marker within it
Array pattern2 --> 32; ! And another, which stores the best match
Global pcount2; ! so far
Constant PATTERN_NULL = $ffff; ! Entry for a token producing no text
Array line_ttype-->32; ! For storing an analysed grammar line
Array line_tdata-->32;
Array line_token-->32;
Global parameters; ! Parameters (objects) entered so far
Global nsns; ! Number of special_numbers entered so far
Global special_number1; ! First number, if one was typed
Global special_number2; ! Second number, if two were typed
! ------------------------------------------------------------------------------
! Inferences and looking ahead
! ------------------------------------------------------------------------------
Global params_wanted; ! Number of parameters needed
! (which may change in parsing)
Global inferfrom; ! The point from which the rest of the
! command must be inferred
Global inferword; ! And the preposition inferred
Global dont_infer; ! Another dull flag
Global no_infer_message = false; ! Use in ChooseObjects to suppress
! an inference message.
Global action_to_be; ! (If the current line were accepted.)
Global action_reversed; ! (Parameters would be reversed in order.)
Global advance_warning; ! What a later-named thing will be
! ------------------------------------------------------------------------------
! At the level of individual tokens now
! ------------------------------------------------------------------------------
Global found_ttype; ! Used to break up tokens into type
Global found_tdata; ! and data (by AnalyseToken)
Global token_filter; ! For noun filtering by user routines
Global length_of_noun; ! Set by NounDomain to no of words in noun
#Ifdef TARGET_ZCODE;
Constant REPARSE_CODE = 10000; ! Signals "reparse the text" as a reply
! from NounDomain
#Ifnot; ! TARGET_GLULX
Constant REPARSE_CODE = $40000000; ! The parser rather gunkily adds addresses
! to REPARSE_CODE for some purposes and
! expects the result to be greater than
! REPARSE_CODE (signed comparison).
! So Glulx Inform is limited to a single
! gigabyte of storage, for the moment.
#Endif; ! TARGET_
Global lookahead; ! The token after the one now being matched
Global multi_mode; ! Multiple mode
Global multi_wanted; ! Number of things needed in multitude
Global multi_had; ! Number of things actually found
Global multi_context; ! What token the multi-obj was accepted for
Global indef_mode; ! "Indefinite" mode - ie, "take a brick"
! is in this mode
Global indef_type; ! Bit-map holding types of specification
Global indef_wanted; ! Number of items wanted (100 for all)
Global indef_guess_p; ! Plural-guessing flag
Global indef_owner; ! Object which must hold these items
Global indef_cases; ! Possible gender and numbers of them
Global indef_possambig; ! Has a possibly dangerous assumption
! been made about meaning of a descriptor?
Global indef_nspec_at; ! Word at which a number like "two" was
! parsed (for backtracking)
Global allow_plurals; ! Whether plurals presently allowed or not
Global take_all_rule; ! Slightly different rules apply to
! "take all" than other uses of multiple
! objects, to make adjudication produce
! more pragmatically useful results
! (Not a flag: possible values 0, 1, 2)
Global dict_flags_of_noun; ! Of the noun currently being parsed
! (a bitmap in #dict_par1 format)
Constant DICT_VERB $01;
Constant DICT_META $02;
Constant DICT_PLUR $04;
Constant DICT_PREP $08;
Constant DICT_X654 $70;
Constant DICT_NOUN $80;
Global pronoun_word; ! Records which pronoun ("it", "them", ...)
! caused an error
Global pronoun_obj; ! And what obj it was thought to refer to
Global pronoun__word; ! Saved value
Global pronoun__obj; ! Saved value
! ------------------------------------------------------------------------------
! Searching through scope and parsing "scope=Routine" grammar tokens
! ------------------------------------------------------------------------------
Constant PARSING_REASON = 0; ! Possible reasons for searching scope
Constant TALKING_REASON = 1;
Constant EACH_TURN_REASON = 2;
Constant REACT_BEFORE_REASON = 3;
Constant REACT_AFTER_REASON = 4;
Constant LOOPOVERSCOPE_REASON = 5;
Constant TESTSCOPE_REASON = 6;
Global scope_reason = PARSING_REASON; ! Current reason for searching scope
Global scope_token; ! For "scope=Routine" grammar tokens
Global scope_error;
Global scope_stage; ! 1, 2 then 3
Global ats_flag = 0; ! For AddToScope routines
Global ats_hls; !
Global placed_in_flag; ! To do with PlaceInScope
! ------------------------------------------------------------------------------
! The match list of candidate objects for a given token
! ------------------------------------------------------------------------------
Constant MATCH_LIST_SIZE = 64;
Array match_list --> MATCH_LIST_SIZE; ! An array of matched objects so far
Array match_classes --> MATCH_LIST_SIZE; ! An array of equivalence classes for them
Array match_scores --> MATCH_LIST_SIZE; ! An array of match scores for them
Global number_matched; ! How many items in it? (0 means none)
Global number_of_classes; ! How many equivalence classes?
Global match_length; ! How many words long are these matches?
Global saved_ml;
Global match_from; ! At what word of the input do they begin?
Global bestguess_score; ! What did the best-guess object score?
! ------------------------------------------------------------------------------
! Low level textual manipulation
! ------------------------------------------------------------------------------
#Ifdef TARGET_ZCODE;
! 'buffer' holds the input line as typed by the player
!
! buffer->0 INPUT_BUFFER_LEN - WORDSIZE
! buffer->1 Number of characters input by player
! buffer->2 ... buffer->121 The actual characters
! buffer->122 Spare byte to allow for 'terp bugs
!
! 'parse' holds the result of parsing that line into dictionary words
!
! parse->0 MAX_BUFFER_WORDS
! parse->1 Number of words input by player
!
! parse-->1 Dictionary addr of first input word
! parse->4 Number of characters in the word
! parse->5 Start position in 'buffer' of the word
!
! parse-->3 parse->8,9 Same data for second input word
! ...
! parse-->29 parse->60,61 Same data for MAX_BUFFER_WORDS input word
! parse->62,63,64 Spare bytes (not sure why)
Constant INPUT_BUFFER_LEN = WORDSIZE + 120; ! 120 is limit on input chars
Constant MAX_BUFFER_WORDS = 15; ! Limit on input words
Array buffer -> INPUT_BUFFER_LEN + 1; ! For main line of input
Array buffer2 -> INPUT_BUFFER_LEN + 1; ! For supplementary questions
Array buffer3 -> INPUT_BUFFER_LEN + 1; ! Retaining input for "AGAIN"
#Ifdef VN_1630;
Array parse buffer (MAX_BUFFER_WORDS * 4) + 3; ! Parsed data from 'buffer'
Array parse2 buffer (MAX_BUFFER_WORDS * 4) + 3; ! Parsed data from 'buffer2'
#Ifnot;
Array parse -> 2 + (MAX_BUFFER_WORDS * 4) + 3;
Array parse2 -> 2 + (MAX_BUFFER_WORDS * 4) + 3;
#Endif; ! VN_
#Ifnot; ! TARGET_GLULX
! 'buffer' holds the input line as typed by the player
!
! buffer-->0 Number of characters input by player
! buffer->4 ... buffer->259 The actual characters
!
! 'parse' holds the result of parsing that line into dictionary words
!
! parse-->0 Number of words input by player
!
! parse-->1 Dictionary addr of first input word
! parse-->2 Number of characters in the word
! parse-->3 Start position in 'buffer' of the word
!
! parse-->4,5,6 Same data for second input word
! ...
! parse-->58,59,60 Same data for MAX_BUFFER_WORDS input word
Constant INPUT_BUFFER_LEN = WORDSIZE + 256; ! 256 is limit on input chars
Constant MAX_BUFFER_WORDS = 20; ! Limit on input words
#Ifdef VN_1630;
Array buffer buffer (INPUT_BUFFER_LEN-WORDSIZE); ! For main line of input
Array buffer2 buffer (INPUT_BUFFER_LEN-WORDSIZE); ! For supplementary questions
Array buffer3 buffer (INPUT_BUFFER_LEN-WORDSIZE); ! Retaining input for "AGAIN"
#Ifnot;
Array buffer -> INPUT_BUFFER_LEN;
Array buffer2 -> INPUT_BUFFER_LEN;
Array buffer3 -> INPUT_BUFFER_LEN;
#Endif; ! VN_
Array parse --> 1 + (MAX_BUFFER_WORDS * 3); ! Parsed data from 'buffer'
Array parse2 --> 1 + (MAX_BUFFER_WORDS * 3); ! Parsed data from 'buffer2'
#Endif; ! TARGET_
Constant comma_word = 'comma,'; ! An "untypeable word" used to substitute
! for commas in parse buffers
Global wn; ! Word number within "parse" (from 1)
Global num_words; ! Number of words typed
Global num_desc; ! Number of descriptors typed
Global verb_word; ! Verb word (eg, take in "take all" or
! "dwarf, take all") - address in dict
Global verb_wordnum; ! its number in typing order (eg, 1 or 3)
Global usual_grammar_after; ! Point from which usual grammar is parsed (it may vary from the
! above if user's routines match multi-word verbs)
Global oops_from; ! The "first mistake" word number
Global saved_oops; ! Used in working this out
Constant OOPS_WORKSPACE_LEN 64; ! Used temporarily by "oops" routine
Array oops_workspace -> OOPS_WORKSPACE_LEN;
Global held_back_mode; ! Flag: is there some input from last time
Global hb_wn; ! left over? (And a save value for wn.)
! (Used for full stops and "then".)
Global caps_mode; ! Keep track of (The) with 'proper' caps
Global print_anything_result; ! Return value from a PrintAny() routine
Global initial_lookmode; ! Default, or set in Initialise()
Global before_first_turn; ! True until after initial LOOK
! ----------------------------------------------------------------------------
Array PowersOfTwo_TB ! Used in converting case numbers to case
--> $$100000000000 ! bitmaps
$$010000000000
$$001000000000
$$000100000000
$$000010000000
$$000001000000
$$000000100000
$$000000010000
$$000000001000
$$000000000100
$$000000000010
$$000000000001;
! ============================================================================
! Constants, and one variable, needed for the language definition file
! ----------------------------------------------------------------------------
Constant POSSESS_PK = $100;
Constant DEFART_PK = $101;
Constant INDEFART_PK = $102;
Global short_name_case;
Global dict_start;
Global dict_entry_size;
Global dict_end;
! ----------------------------------------------------------------------------
Include "language__"; ! The natural language definition, whose filename is taken from
! the ICL language_name variable
! ----------------------------------------------------------------------------
#Ifndef LanguageCases;
Constant LanguageCases = 1;
#Endif; ! LanguageCases
! ------------------------------------------------------------------------------
! Pronouns support for the cruder (library 6/2 and earlier) version:
! only needed in English
! ------------------------------------------------------------------------------
#Ifdef EnglishNaturalLanguage;
Global itobj = NULL; ! The object which is currently "it"
Global himobj = NULL; ! The object which is currently "him"
Global herobj = NULL; ! The object which is currently "her"
Global old_itobj = NULL; ! The object which is currently "it"
Global old_himobj = NULL; ! The object which is currently "him"
Global old_herobj = NULL; ! The object which is currently "her"
#Endif; ! EnglishNaturalLanguage
! ============================================================================
! For present and past tenses
! ----------------------------------------------------------------------------
Constant PRESENT_TENSE 0;
Constant PAST_TENSE 1;
! ============================================================================
! For InformLibrary.actor_act() to control what happens when it aborts.
! ----------------------------------------------------------------------------
Constant ACTOR_ACT_ABORT_NOTUNDERSTOOD 1;
Constant ACTOR_ACT_ABORT_ORDER 2;
! ============================================================================
! "Darkness" is not really a place: but it has to be an object so that the
! location-name on the status line can be "Darkness".
! ----------------------------------------------------------------------------
Object thedark "(darkness object)"
with initial 0,
short_name DARKNESS__TX,
description [; return L__M(##Miscellany, 17); ];
! If you want to use the third-person of the narrative voice, you will
! need to replace this selfobj with your own.
Object selfobj "(self object)"
with name ',a' ',b' ',c' ',d' ',e',
short_name YOURSELF__TX,
description [; return L__M(##Miscellany, 19); ],
before NULL,
after NULL,
life NULL,
each_turn NULL,
time_out NULL,
describe NULL,
article "the",
add_to_scope 0,
capacity 100,
parse_name 0,
orders 0,
number 0,
narrative_voice 2,
narrative_tense PRESENT_TENSE,
nameless true,
posture 0,
before_implicit [;Take: return 2;],
has concealed animate proper transparent;
! ============================================================================
! The definition of the token-numbering system used by Inform.
! ----------------------------------------------------------------------------
Constant ILLEGAL_TT = 0; ! Types of grammar token: illegal
Constant ELEMENTARY_TT = 1; ! (one of those below)
Constant PREPOSITION_TT = 2; ! e.g. 'into'
Constant ROUTINE_FILTER_TT = 3; ! e.g. noun=CagedCreature
Constant ATTR_FILTER_TT = 4; ! e.g. edible
Constant SCOPE_TT = 5; ! e.g. scope=Spells
Constant GPR_TT = 6; ! a general parsing routine
Constant NOUN_TOKEN = 0; ! The elementary grammar tokens, and
Constant HELD_TOKEN = 1; ! the numbers compiled by Inform to
Constant MULTI_TOKEN = 2; ! encode them
Constant MULTIHELD_TOKEN = 3;
Constant MULTIEXCEPT_TOKEN = 4;
Constant MULTIINSIDE_TOKEN = 5;
Constant CREATURE_TOKEN = 6;
Constant SPECIAL_TOKEN = 7;
Constant NUMBER_TOKEN = 8;
Constant TOPIC_TOKEN = 9;
Constant GPR_FAIL = -1; ! Return values from General Parsing
Constant GPR_PREPOSITION = 0; ! Routines
Constant GPR_NUMBER = 1;
Constant GPR_MULTIPLE = 2;
Constant GPR_REPARSE = REPARSE_CODE;
Constant GPR_NOUN = $ff00;
Constant GPR_HELD = $ff01;
Constant GPR_MULTI = $ff02;
Constant GPR_MULTIHELD = $ff03;
Constant GPR_MULTIEXCEPT = $ff04;
Constant GPR_MULTIINSIDE = $ff05;
Constant GPR_CREATURE = $ff06;
Constant ENDIT_TOKEN = 15; ! Value used to mean "end of grammar line"
#Iftrue (Grammar__Version == 1);
[ AnalyseToken token m;
found_tdata = token;
if (token < 0) { found_ttype = ILLEGAL_TT; return; }
if (token <= 8) { found_ttype = ELEMENTARY_TT; return; }
if (token < 15) { found_ttype = ILLEGAL_TT; return; }
if (token == 15) { found_ttype = ELEMENTARY_TT; return; }
if (token < 48) { found_ttype = ROUTINE_FILTER_TT;
found_tdata = token - 16;
return;
}
if (token < 80) { found_ttype = GPR_TT;
found_tdata = #preactions_table-->(token-48);
return;
}
if (token < 128) { found_ttype = SCOPE_TT;
found_tdata = #preactions_table-->(token-80);
return;
}
if (token < 180) { found_ttype = ATTR_FILTER_TT;
found_tdata = token - 128;
return;
}
found_ttype = PREPOSITION_TT;
m = #adjectives_table;
for (::) {
if (token == m-->1) { found_tdata = m-->0; return; }
m = m+4;
}
m = #adjectives_table; RunTimeError(1);
found_tdata = m;
];
[ UnpackGrammarLine line_address i m;
for (i=0 : i<32 : i++) {
line_token-->i = ENDIT_TOKEN;
line_ttype-->i = ELEMENTARY_TT;
line_tdata-->i = ENDIT_TOKEN;
}
for (i=0 : i<=5 : i++) {
line_token-->i = line_address->(i+1);
AnalyseToken(line_token-->i);
if ((found_ttype == ELEMENTARY_TT) && (found_tdata == NOUN_TOKEN)
&& (m == line_address->0)) {
line_token-->i = ENDIT_TOKEN;
break;
}
line_ttype-->i = found_ttype;
line_tdata-->i = found_tdata;
if (found_ttype ~= PREPOSITION_TT) m++;
}
action_to_be = line_address->7;
action_reversed = false;
params_wanted = line_address->0;
return line_address + 8;
];
#Ifnot; ! Grammar__Version == 2
[ AnalyseToken token;
if (token == ENDIT_TOKEN) {
found_ttype = ELEMENTARY_TT;
found_tdata = ENDIT_TOKEN;
return;
}
found_ttype = (token->0) & $$1111;
found_tdata = (token+1)-->0;
];
#Ifdef TARGET_ZCODE;
[ UnpackGrammarLine line_address i;
for (i=0 : i<32 : i++) {
line_token-->i = ENDIT_TOKEN;
line_ttype-->i = ELEMENTARY_TT;
line_tdata-->i = ENDIT_TOKEN;
}
action_to_be = 256*(line_address->0) + line_address->1;
action_reversed = ((action_to_be & $400) ~= 0);
action_to_be = action_to_be & $3ff;
line_address--;
params_wanted = 0;
for (i=0 : : i++) {
line_address = line_address + 3;
if (line_address->0 == ENDIT_TOKEN) break;
line_token-->i = line_address;
AnalyseToken(line_address);
if (found_ttype ~= PREPOSITION_TT) params_wanted++;
line_ttype-->i = found_ttype;
line_tdata-->i = found_tdata;
}
return line_address + 1;
];
#Ifnot; ! TARGET_GLULX
[ UnpackGrammarLine line_address i;
for (i=0 : i<32 : i++) {
line_token-->i = ENDIT_TOKEN;
line_ttype-->i = ELEMENTARY_TT;
line_tdata-->i = ENDIT_TOKEN;
}
@aloads line_address 0 action_to_be;
action_reversed = (((line_address->2) & 1) ~= 0);
line_address = line_address - 2;
params_wanted = 0;
for (i=0 : : i++) {
line_address = line_address + 5;
if (line_address->0 == ENDIT_TOKEN) break;
line_token-->i = line_address;
AnalyseToken(line_address);
if (found_ttype ~= PREPOSITION_TT) params_wanted++;
line_ttype-->i = found_ttype;
line_tdata-->i = found_tdata;
}
return line_address + 1;
];
#Endif; ! TARGET_
#Endif; ! Grammar__Version
! To protect against a bug in early versions of the "Zip" interpreter:
! Of course, in Glulx, this routine actually performs work.
#Ifdef TARGET_ZCODE;
[ Tokenise__ b p; b->(2 + b->1) = 0; @tokenise b p; ];
#Ifnot; ! TARGET_GLULX
Array gg_tokenbuf -> DICT_WORD_SIZE;
[ GGWordCompare str1 str2 ix jx;
for (ix=0 : ix<DICT_WORD_SIZE : ix++) {
jx = (str1->ix) - (str2->ix);
if (jx ~= 0) return jx;
}
return 0;
];
[ Tokenise__ buf tab
cx numwords len bx ix wx wpos wlen val res dictlen entrylen;
len = buf-->0;
buf = buf+WORDSIZE;
! First, split the buffer up into words. We use the standard Infocom
! list of word separators (comma, period, double-quote).
cx = 0;
numwords = 0;
while (cx < len) {
while (cx < len && buf->cx == ' ') cx++;
if (cx >= len) break;
bx = cx;
if (buf->cx == '.' or ',' or '"') cx++;
else {
while (cx < len && buf->cx ~= ' ' or '.' or ',' or '"') cx++;
}
tab-->(numwords*3+2) = (cx-bx);
tab-->(numwords*3+3) = WORDSIZE+bx;
numwords++;
if (numwords >= MAX_BUFFER_WORDS) break;
}
tab-->0 = numwords;
! Now we look each word up in the dictionary.
dictlen = #dictionary_table-->0;
entrylen = DICT_WORD_SIZE + 7;
for (wx=0 : wx<numwords : wx++) {
wlen = tab-->(wx*3+2);
wpos = tab-->(wx*3+3);
! Copy the word into the gg_tokenbuf array, clipping to DICT_WORD_SIZE
! characters and lower case.
if (wlen > DICT_WORD_SIZE) wlen = DICT_WORD_SIZE;
cx = wpos - WORDSIZE;
for (ix=0 : ix<wlen : ix++) gg_tokenbuf->ix = glk($00A0, buf->(cx+ix));
for (: ix<DICT_WORD_SIZE : ix++) gg_tokenbuf->ix = 0;
val = #dictionary_table + WORDSIZE;
@binarysearch gg_tokenbuf DICT_WORD_SIZE val entrylen dictlen 1 1 res;
tab-->(wx*3+1) = res;
}
];
#Endif; ! TARGET_
! ============================================================================
! The InformParser object abstracts the front end of the parser.
!
! InformParser.parse_input(results)
! returns only when a sensible request has been made, and puts into the
! "results" buffer:
!
! --> 0 = The action number
! --> 1 = Number of parameters
! --> 2, 3, ... = The parameters (object numbers), but
! 0 means "put the multiple object list here"
! 1 means "put one of the special numbers here"
!
! ----------------------------------------------------------------------------
Object InformParser "(Inform Parser)"
with parse_input [ results; Parser__parse(results); ],
has proper;
! ----------------------------------------------------------------------------
! The Keyboard routine actually receives the player's words,
! putting the words in "a_buffer" and their dictionary addresses in
! "a_table". It is assumed that the table is the same one on each
! (standard) call.
!
! It can also be used by miscellaneous routines in the game to ask
! yes-no questions and the like, without invoking the rest of the parser.
!
! Return the number of words typed
! ----------------------------------------------------------------------------
#Ifdef TARGET_ZCODE;
[ GetNthChar a_buffer n i;
for (i = 0: a_buffer->(2+i) == ' ': i++) {
if (i > a_buffer->(1)) return false;
}
return a_buffer->(2+i+n);
];
[ KeyboardPrimitive a_buffer a_table;
read a_buffer a_table;
#Iftrue (#version_number == 6);
@output_stream -1;
@loadb a_buffer 1 -> sp;
@add a_buffer 2 -> sp;
@print_table sp sp;
new_line;
@output_stream 1;
#Endif;
];
[ KeyCharPrimitive win key;
if (win) @set_window win;
@read_char 1 -> key;
return key;
];
[ KeyTimerInterrupt;
rtrue;
];