view xrogue/rings.c @ 310:827441d05b3e

Advanced Rogue family: fix some potential buffer overflows. Some code for determining the score file location assumed that PATH_MAX would be less than 1024, which cannot be guaranteed. Advanced Rogue 5 and 7, and XRogue, have had the buffers for the file name enlarged. UltraRogue never called the functions, so the code has been deleted instead.
author John "Elwin" Edwards
date Mon, 03 May 2021 19:05:37 -0400
parents 7c1cb43f346e
children
line wrap: on
line source

/*
    rings.c - Routines dealing specificaly with rings
    
    XRogue: Expeditions into the Dungeons of Doom
    Copyright (C) 1991 Robert Pietkivitch
    All rights reserved.
    
    Based on "Advanced Rogue"
    Copyright (C) 1984, 1985 Michael Morgan, Ken Dalka and AT&T
    All rights reserved.

    Based on "Rogue: Exploring the Dungeons of Doom"
    Copyright (C) 1980, 1981 Michael Toy, Ken Arnold and Glenn Wichman
    All rights reserved.
    
    See the file LICENSE.TXT for full copyright and licensing information.
*/

#include <stdlib.h>
#include <string.h>
#include <curses.h>
#include "rogue.h"

/*
 * routines dealing specifically with rings
 */

/*
 * how much food does this ring use up?
 */

int
ring_eat(int hand)
{
    if (cur_ring[hand] == NULL)
        return 0;
    switch (cur_ring[hand]->o_which) {
        case R_VAMPREGEN:
            return 3;
        case R_REGEN:
        case R_SUSABILITY:
            return 2;
        case R_HEALTH:
            return 1;
        case R_SEARCH:
        case R_SEEINVIS:
            return (rnd(100) < 50);  /* 0 or 1 */
        case R_DIGEST:
            if (cur_ring[hand]->o_ac >= 0)
                return (-(cur_ring[hand]->o_ac)-1);
            else
                return (-(cur_ring[hand]->o_ac));
    }
    return 0;
}

void
ring_on(struct linked_list *item)
{
    register struct object *obj;
    register int save_max;

    obj = OBJPTR(item);

    /*
     * Calculate the effect it has on the poor guy.
     */
    switch (obj->o_which)
    {
        case R_ADDSTR:
            save_max = max_stats.s_str;
            chg_str(obj->o_ac);
            max_stats.s_str = save_max;
        when R_ADDHIT:
            pstats.s_dext += obj->o_ac;
        when R_ADDINTEL:
            pstats.s_intel += obj->o_ac;
        when R_ADDWISDOM:
            pstats.s_wisdom += obj->o_ac;
        when R_SEEINVIS:
        if (on(player, CANSEE)) msg("Your eyes sparkle.");
        else msg("Your eyes begin to tingle.");
            turn_on(player, CANSEE);
            light(&hero);
            mvwaddch(cw, hero.y, hero.x, PLAYER);
        when R_AGGR:
            aggravate(TRUE, TRUE);  /* all charactors are affected*/
        when R_WARMTH:
        if (on(player, NOCOLD)) msg("You feel warm all over.");
        else msg("You begin to feel warm.");
            turn_on(player, NOCOLD);
        when R_FIRE:
        if (on(player, NOFIRE)) msg("You feel quite fire proof now.");
        else msg("You begin to feel fire proof.");
            turn_on(player, NOFIRE);
        when R_LIGHT: {
            if(roomin(&hero) != NULL) {
                light(&hero);
                mvwaddch(cw, hero.y, hero.x, PLAYER);
            }
    }
        when R_SEARCH:
            start_daemon(ring_search, NULL, AFTER);
        when R_TELEPORT:
            start_daemon(ring_teleport, NULL, AFTER);
    }
    status(FALSE);
    if (r_know[obj->o_which] && r_guess[obj->o_which]) {
        free(r_guess[obj->o_which]);
        r_guess[obj->o_which] = NULL;
    }
    else if (!r_know[obj->o_which] && 
             askme && 
             (obj->o_flags & ISKNOW) == 0 &&
             r_guess[obj->o_which] == NULL) {
        nameitem(item, FALSE);
    }
}

/*
 * print ring bonuses
 */

char *
ring_num(struct object *obj)
{
    static char buf[5];

    if (!(obj->o_flags & ISKNOW))
        return "";
    switch (obj->o_which)
    {
        case R_PROTECT:
        case R_ADDSTR:
        case R_ADDDAM:
        case R_ADDHIT:
        case R_ADDINTEL:
        case R_ADDWISDOM:
        case R_DIGEST:
            buf[0] = ' ';
            strcpy(&buf[1], num(obj->o_ac, 0));
        when R_AGGR:
        case R_LIGHT:
        case R_CARRY:
        case R_TELEPORT:
            if (obj->o_flags & ISCURSED)
                return " cursed";
            else
                return "";
        otherwise:
            return "";
    }
    return buf;
}

/* 
 * Return the effect of the specified ring 
 */

int
ring_value(int type)
{
    int result = 0;

    if (ISRING(LEFT_1, type))  result += cur_ring[LEFT_1]->o_ac;
    if (ISRING(LEFT_2, type))  result += cur_ring[LEFT_2]->o_ac;
    if (ISRING(LEFT_3, type))  result += cur_ring[LEFT_3]->o_ac;
    if (ISRING(LEFT_4, type))  result += cur_ring[LEFT_4]->o_ac;
    if (ISRING(RIGHT_1, type)) result += cur_ring[RIGHT_1]->o_ac;
    if (ISRING(RIGHT_2, type)) result += cur_ring[RIGHT_2]->o_ac;
    if (ISRING(RIGHT_3, type)) result += cur_ring[RIGHT_3]->o_ac;
    if (ISRING(RIGHT_4, type)) result += cur_ring[RIGHT_4]->o_ac;
    return(result);
}