src/powers.c

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/*
 * powers.c - power manipulation routines 
 */

#include "copyright.h"
#include "config.h"

#include "db.h"
#include "mudconf.h"
#include "externs.h"
#include "command.h"
#include "powers.h"
#include "alloc.h"

int ph_any(dbref target, dbref player, POWER power, int fpowers, int reset)
{
        if(fpowers & POWER_EXT) {
                if(reset)
                        s_Powers2(target, Powers2(target) & ~power);
                else
                        s_Powers2(target, Powers2(target) | power);
        } else {
                if(reset)
                        s_Powers(target, Powers(target) & ~power);
                else
                        s_Powers(target, Powers(target) | power);
        }
        return 1;
}

int ph_god(dbref target, dbref player, POWER power, int fpowers, int reset)
{
        if(!God(player))
                return 0;
        return (ph_any(target, player, power, fpowers, reset));
}

int ph_wiz(dbref target, dbref player, POWER power, int fpowers, int reset)
{
        if(!Wizard(player) & !God(player))
                return 0;
        return (ph_any(target, player, power, fpowers, reset));
}

int ph_wizroy(dbref target, dbref player, POWER power, int fpowers, int reset)
{
        if(!WizRoy(player) & !God(player))
                return 0;
        return (ph_any(target, player, power, fpowers, reset));
}

int ph_inherit(dbref target, dbref player, POWER power, int fpowers,
                           int reset)
{
        if(!Inherits(player))
                return 0;
        return (ph_any(target, player, power, fpowers, reset));
}

POWERENT gen_powers[] = {
        {(char *) "quota", POW_CHG_QUOTAS, 0, 0, ph_wiz},
        {(char *) "chown_anything", POW_CHOWN_ANY, 0, 0, ph_wiz},
        {(char *) "announce", POW_ANNOUNCE, 0, 0, ph_wiz},
        {(char *) "boot", POW_BOOT, 0, 0, ph_wiz},
        {(char *) "halt", POW_HALT, 0, 0, ph_wiz},
        {(char *) "control_all", POW_CONTROL_ALL, 0, 0, ph_god},
        {(char *) "expanded_who", POW_WIZARD_WHO, 0, 0, ph_wiz},
        {(char *) "see_all", POW_EXAM_ALL, 0, 0, ph_wiz},
        {(char *) "prog", POW_PROG, 0, 0, ph_wiz},
        {(char *) "find_unfindable", POW_FIND_UNFIND, 0, 0, ph_wiz},
        {(char *) "free_money", POW_FREE_MONEY, 0, 0, ph_wiz},
        {(char *) "free_quota", POW_FREE_QUOTA, 0, 0, ph_wiz},
        {(char *) "hide", POW_HIDE, 0, 0, ph_wiz},
        {(char *) "idle", POW_IDLE, 0, 0, ph_wiz},
        {(char *) "search", POW_SEARCH, 0, 0, ph_wiz},
        {(char *) "long_fingers", POW_LONGFINGERS, 0, 0, ph_wiz},
        {(char *) "comm_all", POW_COMM_ALL, 0, 0, ph_wiz},
        {(char *) "see_queue", POW_SEE_QUEUE, 0, 0, ph_wiz},
        {(char *) "see_hidden", POW_SEE_HIDDEN, 0, 0, ph_wiz},
        {(char *) "monitor", POW_MONITOR, 0, 0, ph_wiz},
        {(char *) "poll", POW_POLL, 0, 0, ph_wiz},
        {(char *) "no_destroy", POW_NO_DESTROY, 0, 0, ph_wiz},
        {(char *) "guest", POW_GUEST, 0, 0, ph_god},
        {(char *) "stat_any", POW_STAT_ANY, 0, 0, ph_wiz},
        {(char *) "steal_money", POW_STEAL, 0, 0, ph_wiz},
        {(char *) "tel_anywhere", POW_TEL_ANYWHR, 0, 0, ph_wiz},
        {(char *) "tel_anything", POW_TEL_UNRST, 0, 0, ph_wiz},
        {(char *) "unkillable", POW_UNKILLABLE, 0, 0, ph_wiz},
        {(char *) "pass_locks", POW_PASS_LOCKS, 0, 0, ph_wiz},
        {(char *) "builder", POW_BUILDER, POWER_EXT, 0, ph_wiz},
/* BattletechMUX Powers */
        {(char *) "mech", POW_MECH, POWER_EXT, 0, ph_wiz},
        {(char *) "security", POW_SECURITY, POWER_EXT, 0, ph_wiz},
        {(char *) "mechrep", POW_MECHREP, POWER_EXT, 0, ph_wiz},
        {(char *) "map", POW_MAP, POWER_EXT, 0, ph_wiz},
        {(char *) "tech", POW_TECH, POWER_EXT, 0, ph_wiz},
        {(char *) "template", POW_TEMPLATE, POWER_EXT, 0, ph_wiz},
        {NULL, 0, 0, 0, 0}
};

void init_powertab(void)
{
        POWERENT *fp;
        char *nbuf, *np, *bp;

        hashinit(&mudstate.powers_htab, 15 * HASH_FACTOR);
        nbuf = alloc_sbuf("init_powertab");
        for(fp = gen_powers; fp->powername; fp++) {
                for(np = nbuf, bp = (char *) fp->powername; *bp; np++, bp++)
                        *np = ToLower(*bp);
                *np = '\0';
                hashadd(nbuf, (int *) fp, &mudstate.powers_htab);
        }
        free_sbuf(nbuf);
}

void display_powertab(dbref player)
{
        char *buf, *bp;
        POWERENT *fp;

        bp = buf = alloc_lbuf("display_powertab");
        safe_str((char *) "Powers:", buf, &bp);
        for(fp = gen_powers; fp->powername; fp++) {
                if((fp->listperm & CA_WIZARD) && !Wizard(player))
                        continue;
                if((fp->listperm & CA_GOD) && !God(player))
                        continue;
                safe_chr(' ', buf, &bp);
                safe_str((char *) fp->powername, buf, &bp);
        }
        *bp = '\0';
        notify(player, buf);
        free_lbuf(buf);
}

POWERENT *find_power(dbref thing, char *powername)
{
        char *cp;

        /*
         * Make sure the power name is valid 
         */

        for(cp = powername; *cp; cp++)
                *cp = ToLower(*cp);
        return (POWERENT *) hashfind(powername, &mudstate.powers_htab);
}

int decode_power(dbref player, char *powername, POWERSET * pset)
{
        POWERENT *pent;

        pset->word1 = 0;
        pset->word2 = 0;

        pent = (POWERENT *) hashfind(powername, &mudstate.powers_htab);
        if(!pent) {
                notify_printf(player, "%s: Power not found.", powername);
                return 0;
        }
        if(pent->powerpower & POWER_EXT)
                pset->word2 = pent->powervalue;
        else
                pset->word1 = pent->powervalue;

        return 1;
}

/*
 * Set or clear a specified power on an object. 
 */
void power_set(dbref target, dbref player, char *power, int key)
{
        POWERENT *fp;
        int negate, result;

        /*
         * Trim spaces, and handle the negation character 
         */

        negate = 0;
        while (*power && isspace(*power))
                power++;
        if(*power == '!') {
                negate = 1;
                power++;
        }
        while (*power && isspace(*power))
                power++;

        /*
         * Make sure a power name was specified 
         */

        if(*power == '\0') {
                if(negate)
                        notify(player, "You must specify a power to clear.");
                else
                        notify(player, "You must specify a power to set.");
                return;
        }
        fp = find_power(target, power);
        if(fp == NULL) {
                notify(player, "I don't understand that power.");
                return;
        }
        /*
         * Invoke the power handler, and print feedback 
         */

        result =
                fp->handler(target, player, fp->powervalue, fp->powerpower, negate);
        if(!result)
                notify(player, "Permission denied.");
        else if(!(key & SET_QUIET) && !Quiet(player))
                notify_printf(player, "%s - %s %s", Name(target), fp->powername,
                                          negate ? "removed." : "granted.");
        return;
}

int has_power(dbref player, dbref it, char *powername)
{
        POWERENT *fp;
        POWER fv;

        fp = find_power(it, powername);
        if(fp == NULL)
                return 0;

        if(fp->powerpower & POWER_EXT)
                fv = Powers2(it);
        else
                fv = Powers(it);

        if(fv & fp->powervalue) {
                if((fp->listperm & CA_WIZARD) && !Wizard(player))
                        return 0;
                if((fp->listperm & CA_GOD) && !God(player))
                        return 0;
                return 1;
        }
        return 0;
}

char *power_description(dbref player, dbref target)
{
        char *buff, *bp;
        POWERENT *fp;
        int otype;
        POWER fv;

        /*
         * Allocate the return buffer 
         */

        otype = Typeof(target);
        bp = buff = alloc_mbuf("power_description");

        /*
         * Store the header strings and object type 
         */

        safe_mb_str((char *) "Powers:", buff, &bp);

        for(fp = gen_powers; fp->powername; fp++) {
                if(fp->powerpower & POWER_EXT)
                        fv = Powers2(target);
                else
                        fv = Powers(target);
                if(fv & fp->powervalue) {
                        if((fp->listperm & CA_WIZARD) && !Wizard(player))
                                continue;
                        if((fp->listperm & CA_GOD) && !God(player))
                                continue;
                        safe_mb_chr(' ', buff, &bp);
                        safe_mb_str((char *) fp->powername, buff, &bp);
                }
        }

        /*
         * Terminate the string, and return the buffer to the caller 
         */

        *bp = '\0';
        return buff;
}

void decompile_powers(dbref player, dbref thing, char *thingname)
{
        POWER f1, f2;
        POWERENT *fp;
        char new[LBUF_SIZE];

        /*
         * Report generic powers 
         */

        f1 = Powers(thing);
        f2 = Powers2(thing);

        for(fp = gen_powers; fp->powername; fp++) {

                /*
                 * Skip if we shouldn't decompile this power 
                 */

                if(fp->listperm & CA_NO_DECOMP)
                        continue;

                /*
                 * Skip if this power is not set 
                 */

                if(fp->powerpower & POWER_EXT) {
                        if(!(f2 & fp->powervalue))
                                continue;
                } else {
                        if(!(f1 & fp->powervalue))
                                continue;
                }

                /*
                 * Skip if we can't see this power 
                 */

                if(!check_access(player, fp->listperm))
                        continue;

                /*
                 * We made it this far, report this power 
                 */
                strncpy(new, thingname, LBUF_SIZE-1);
                notify_printf(player, "@power %s=%s", strip_ansi_r(new,thingname,strlen(thingname)),
                                          fp->powername);
        }
}

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