#include "copyright.h" /* Routines for parsing arguments */ #include <ctype.h> #include "db.h" #include "config.h" #include "match.h" #define DOWNCASE(x) (isupper(x) ? tolower(x) : (x)) static dbref exact_match = NOTHING; /* holds result of exact match */ static int check_keys = 0; /* if non-zero, check for keys */ static dbref last_match = NOTHING; /* holds result of last match */ static int match_count; /* holds total number of inexact matches */ static dbref match_who; /* player who is being matched around */ static const char *match_name; /* name to match */ static int preferred_type = NOTYPE; /* preferred type */ void init_match(dbref player, const char *name, int type) { exact_match = last_match = NOTHING; match_count = 0; match_who = player; match_name = name; check_keys = 0; preferred_type = type; } void init_match_check_keys(dbref player, const char *name, int type) { init_match(player, name, type); check_keys = 1; } static dbref choose_thing(dbref thing1, dbref thing2) { int has1; int has2; if(thing1 == NOTHING) { return thing2; } else if(thing2 == NOTHING) { return thing1; } if(preferred_type != NOTYPE) { if(Typeof(thing1) == preferred_type) { if(Typeof(thing2) != preferred_type) { return thing1; } } else if(Typeof(thing2) == preferred_type) { return thing2; } } if(check_keys) { has1 = could_doit(match_who, thing1); has2 = could_doit(match_who, thing2); if(has1 && !has2) { return thing1; } else if (has2 && !has1) { return thing2; } /* else fall through */ } return (random() % 2 ? thing1 : thing2); } void match_player(void) { dbref match; const char *p; if(*match_name == LOOKUP_TOKEN) { for(p = match_name + 1; isspace(*p); p++); if((match = lookup_player(p)) != NOTHING) { exact_match = match; } } } /* returns nnn if name = #nnn, else NOTHING */ static dbref absolute_name(void) { dbref match; if(*match_name == NUMBER_TOKEN) { match = parse_dbref(match_name+1); if(match < 0 || match >= db_top) { return NOTHING; } else { return match; } } else { return NOTHING; } } void match_absolute(void) { dbref match; if((match = absolute_name()) != NOTHING) { exact_match = match; } } void match_me(void) { if(!string_compare(match_name, "me")) { exact_match = match_who; } } void match_here(void) { if(!string_compare(match_name, "here") && db[match_who].location != NOTHING) { exact_match = db[match_who].location; } } static void match_list(dbref first) { dbref absolute; absolute = absolute_name(); if(!controls(match_who, absolute)) absolute = NOTHING; DOLIST(first, first) { if(first == absolute) { exact_match = first; return; } else if(!string_compare(db[first].name, match_name)) { /* if there are multiple exact matches, randomly choose one */ exact_match = choose_thing(exact_match, first); } else if(string_match(db[first].name, match_name)) { last_match = first; match_count++; } } } void match_possession(void) { match_list(db[match_who].contents); } void match_neighbor(void) { dbref loc; if((loc = db[match_who].location) != NOTHING) { match_list(db[loc].contents); } } void match_exit(void) { dbref loc; dbref exit; dbref absolute; const char *match; const char *p; if((loc = db[match_who].location) != NOTHING) { absolute = absolute_name(); if(!controls(match_who, absolute)) absolute = NOTHING; DOLIST(exit, db[loc].exits) { if(exit == absolute) { exact_match = exit; } else { match = db[exit].name; while(*match) { /* check out this one */ for(p = match_name; (*p && DOWNCASE(*p) == DOWNCASE(*match) && *match != EXIT_DELIMITER); p++, match++); /* did we get it? */ if(*p == '\0') { /* make sure there's nothing afterwards */ while(isspace(*match)) match++; if(*match == '\0' || *match == EXIT_DELIMITER) { /* we got it */ exact_match = choose_thing(exact_match, exit); goto next_exit; /* got this match */ } } /* we didn't get it, find next match */ while(*match && *match++ != EXIT_DELIMITER); while(isspace(*match)) match++; } } next_exit: ; } } } void match_everything(void) { match_exit(); match_neighbor(); match_possession(); match_me(); match_here(); if(Wizard(match_who)) { match_absolute(); match_player(); } } dbref match_result(void) { if(exact_match != NOTHING) { return exact_match; } else { switch(match_count) { case 0: return NOTHING; case 1: return last_match; default: return AMBIGUOUS; } } } /* use this if you don't care about ambiguity */ dbref last_match_result(void) { if(exact_match != NOTHING) { return exact_match; } else { return last_match; } } dbref noisy_match_result(void) { dbref match; switch(match = match_result()) { case NOTHING: notify(match_who, NOMATCH_MESSAGE); return NOTHING; case AMBIGUOUS: notify(match_who, AMBIGUOUS_MESSAGE); return NOTHING; default: return match; } }