/* match.c */ /* Routines for parsing arguments */ #include "copyright.h" #include <ctype.h> #include <string.h> #include "config.h" #include "db.h" #include "externs.h" #include "globals.h" #include "match.h" 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 */ #ifdef DO_GLOBALS static int global = 0; /* when 0 -- normal match */ /* 1 -- global match */ /* 2 -- remote match */ #endif char const *nomatch_message="I don't see that here."; char const *ambiguous_message="I don't know which one you mean!"; /* * check a list for objects that are prefix's for string, && are controlled * || link_ok */ dbref pref_match(player, list, string) dbref player; dbref list; const char *string; { dbref lmatch = NOTHING; int mlen = 0; while (list != NOTHING) { if (string_prefix(string, db[list].name) && ((Typeof(list) == TYPE_THING) && (db[list].flags & THING_PUPPET)) && controls(player, list)) { if (strlen(db[list].name) > mlen) { lmatch = list; mlen = strlen(db[list].name); } } list = db[list].next; } return (lmatch); } void init_match(player, name, type) 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; #ifdef DO_GLOBALS global = NORMAL_MATCH; #endif } void init_match_check_keys(player, name, type) dbref player; const char *name; int type; { init_match(player, name, type); check_keys = 1; } #ifdef DO_GLOBALS void init_match_global(player, name, type) dbref player; const char *name; int type; { init_match(player, name, type); global = GLOBAL_MATCH; } void init_match_global_check_keys(player, name, type) dbref player; const char *name; int type; { init_match_global(player, name, type); check_keys = 1; } void init_match_remote(location, name, type) dbref location; const char *name; int type; { exact_match = last_match = NOTHING; match_count = 0; match_who = location; match_name = name; check_keys = 0; preferred_type = type; global = REMOTE_MATCH; } #endif static dbref choose_thing(thing1, thing2) 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() { 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() { 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() { dbref match; if ((match = absolute_name()) != NOTHING) { exact_match = match; } } void match_me() { if (!string_compare(match_name, "me")) { exact_match = match_who; } } void match_here() { if (!string_compare(match_name, "here") && db[match_who].location != NOTHING) { exact_match = db[match_who].location; } } static void match_list(first) dbref first; { dbref absolute; absolute = absolute_name(); if (!controls(match_who, absolute)) absolute = NOTHING; DOLIST(first, first) { Access(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() { match_list(db[match_who].contents); } void match_neighbor() { dbref loc; if ((loc = db[match_who].location) != NOTHING) { match_list(db[loc].contents); } } #ifdef DO_GLOBALS void match_remote_contents() { if (match_who != NOTHING) match_list(db[match_who].contents); } #endif void match_container() { if (db[match_who].location != NOTHING) match_list(db[match_who].location); } void match_exit() { dbref loc; dbref exit; dbref absolute; const char *match; const char *p; #ifdef DO_GLOBALS switch (global) { case NORMAL_MATCH: loc = db[match_who].location; break; case GLOBAL_MATCH: loc = MASTER_ROOM; break; case REMOTE_MATCH: loc = match_who; break; } #else loc = db[match_who].location; #endif if (loc != NOTHING) { if (Typeof(loc) != TYPE_ROOM) return; absolute = absolute_name(); if (!controls(match_who, absolute)) absolute = NOTHING; DOLIST(exit, db[loc].exits) { Access(exit); 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() { match_exit(); match_neighbor(); match_possession(); match_me(); match_here(); match_absolute(); match_player(); } #ifdef DO_GLOBALS void match_remote() { match_exit(); match_remote_contents(); match_absolute(); match_player(); } #endif dbref match_result() { 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() { if (exact_match != NOTHING) { return exact_match; } else { return last_match; } } dbref noisy_match_result() { 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; } } dbref match_controlled(player, name) dbref player; const char *name; { dbref match; init_match(player, name, NOTYPE); match_everything(); match = noisy_match_result(); if (match != NOTHING && !controls(player, match)) { notify(player, "Permission denied."); return NOTHING; } else { return match; } }