Mercurial > hg > early-roguelike
view rogue3/rings.c @ 280:70aa5808c782
Fix potential segfaults at restore related to ctime().
In some games, restore() passes the result of ctime() to mvprintw() or
some other variadic message-formatting function. If ctime() has not
been declared properly, its return type is inferred to be int instead
of char *. This does not cause a warning because the compiler does not
know the correct type of variadic arguments.
On platforms where ints and pointers are not the same size, this can,
probably depending on alignment, result in a segfault that is not easy
to trace.
Including time.h fixes the problem. Some games manually declared
ctime() and avoided the bug. These declarations have also been
replaced with the include.
author | John "Elwin" Edwards |
---|---|
date | Fri, 15 Sep 2017 20:51:10 -0400 |
parents | 527e2150eaf0 |
children |
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/* * routines dealing specifically with rings * * @(#)rings.c 3.17 (Berkeley) 6/15/81 * * 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 "curses.h" #include <stdlib.h> #include <string.h> #include "rogue.h" void ring_on() { struct object *obj; struct linked_list *item; int ring; str_t save_max; char buf[80]; item = get_item("put on", RING); /* * Make certain that it is somethings that we want to wear */ if (item == NULL) return; obj = (struct object *) ldata(item); if (obj->o_type != RING) { if (!terse) msg("It would be difficult to wrap that around a finger"); else msg("Not a ring"); return; } /* * find out which hand to put it on */ if (is_current(obj)) return; if (cur_ring[LEFT] == NULL && cur_ring[RIGHT] == NULL) { if ((ring = gethand()) < 0) return; } else if (cur_ring[LEFT] == NULL) ring = LEFT; else if (cur_ring[RIGHT] == NULL) ring = RIGHT; else { if (!terse) msg("You already have a ring on each hand"); else msg("Wearing two"); return; } cur_ring[ring] = obj; /* * 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; break; case R_SEEINVIS: player.t_flags |= CANSEE; light(&hero); mvwaddch(cw, hero.y, hero.x, PLAYER); break; case R_AGGR: aggravate(); break; } status(); if (obj->o_which >= MAXRINGS) return; 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 && r_guess[obj->o_which] == NULL) { mpos = 0; msg(terse ? "Call it: " : "What do you want to call it? "); if (get_str(buf, cw) == NORM) { r_guess[obj->o_which] = malloc(strlen(buf) + 1); if (r_guess[obj->o_which] != NULL) strcpy(r_guess[obj->o_which], buf); } msg(""); } } void ring_off() { int ring; struct object *obj; if (cur_ring[LEFT] == NULL && cur_ring[RIGHT] == NULL) { if (terse) msg("No rings"); else msg("You aren't wearing any rings"); return; } else if (cur_ring[LEFT] == NULL) ring = RIGHT; else if (cur_ring[RIGHT] == NULL) ring = LEFT; else if ((ring = gethand()) < 0) return; mpos = 0; obj = cur_ring[ring]; if (obj == NULL) { msg("Not wearing such a ring"); return; } if (dropcheck(obj)) msg("Was wearing %s", inv_name(obj, TRUE)); } int gethand() { int c; for (;;) { if (terse) msg("Left or Right ring? "); else msg("Left hand or right hand? "); if ((c = readchar(cw)) == 'l' || c == 'L') return LEFT; else if (c == 'r' || c == 'R') return RIGHT; else if (c == ESCAPE) return -1; mpos = 0; if (terse) msg("L or R"); else msg("Please type L or R"); } } /* * 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_REGEN: return 2; case R_SUSTSTR: return 1; case R_SEARCH: return (rnd(100) < 33); case R_DIGEST: return -(rnd(100) < 50); default: return 0; } } /* * 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: buf[0] = ' '; strcpy(&buf[1], num(obj->o_ac, 0)); otherwise: return ""; } return buf; }