view rogue3/fight.c @ 233:0990adf580ee

Declare some function arguments as const. Some functions, mostly in fight.c, declared variables as pointers to const char but passed them to functions that took pointers to ordinary char. The strings did not actually get modified, so adding 'const' to the function definitions removed the warnings.
author John "Elwin" Edwards
date Sun, 06 Mar 2016 19:32:47 -0500
parents 527e2150eaf0
children e7aab31362af
line wrap: on
line source

/*
 * All the fighting gets done here
 *
 * @(#)fight.c	3.28 (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 <ctype.h>
#include <string.h>
#include <stdlib.h>
#include "rogue.h"

int e_levels[] = {
    10,20,40,80,160,320,640,1280,2560,5120,10240,20480,
    40920, 81920, 163840, 327680, 655360, 1310720, 2621440, 0 };

/*
 * fight:
 *	The player attacks the monster.
 */

int
fight(coord *mp, int mn, struct object *weap, int thrown)
{
    struct thing *tp;
    struct linked_list *item;
    int did_hit = TRUE;

    /*
     * Find the monster we want to fight
     */
    if ((item = find_mons(mp->y, mp->x)) == NULL)
    {
	debug("Fight what @ %d,%d", mp->y, mp->x);
	return(0);
    }
    tp = (struct thing *) ldata(item);
    /*
     * Since we are fighting, things are not quiet so no healing takes
     * place.
     */
    quiet = 0;
    runto(mp, &hero);
    /*
     * Let him know it was really a mimic (if it was one).
     */
    if (tp->t_type == 'M' && tp->t_disguise != 'M' && off(player, ISBLIND))
    {
	msg("Wait! That's a mimic!");
	tp->t_disguise = 'M';
	did_hit = thrown;
    }
    if (did_hit)
    {
	char *mname;

	did_hit = FALSE;
	if (on(player, ISBLIND))
	    mname = "it";
	else
	    mname = monsters[mn-'A'].m_name;
	if (roll_em(&pstats, &tp->t_stats, weap, thrown))
	{
	    did_hit = TRUE;
	    if (thrown)
		thunk(weap, mname);
	    else
		hit(NULL, mname);
	    if (on(player, CANHUH))
	    {
		msg("Your hands stop glowing red");
		msg("The %s appears confused.", mname);
		tp->t_flags |= ISHUH;
		player.t_flags &= ~CANHUH;
	    }
	    if (tp->t_stats.s_hpt <= 0)
		killed(item, TRUE);
	}
	else
	    if (thrown)
		bounce(weap, mname);
	    else
		miss(NULL, mname);
    }
    count = 0;
    return did_hit;
}

/*
 * attack:
 *	The monster attacks the player
 */

int
attack(struct thing *mp)
{
    char *mname;

    /*
     * Since this is an attack, stop running and any healing that was
     * going on at the time.
     */
    running = FALSE;
    quiet = 0;
    if (mp->t_type == 'M' && off(player, ISBLIND))
	mp->t_disguise = 'M';
    if (on(player, ISBLIND))
	mname = "it";
    else
	mname = monsters[mp->t_type-'A'].m_name;
    if (roll_em(&mp->t_stats, &pstats, NULL, FALSE))
    {
	if (mp->t_type != 'E')
	    hit(mname, NULL);
	if (pstats.s_hpt <= 0)
	    death(mp->t_type);	/* Bye bye life ... */
	if (off(*mp, ISCANC))
	    switch (mp->t_type)
	    {
		case 'R':
		    /*
		     * If a rust monster hits, you lose armor
		     */
		    if (cur_armor != NULL && cur_armor->o_ac < 9)
		    {
			if (!terse)
			    msg("Your armor appears to be weaker now. Oh my!");
			else
			    msg("Your armor weakens");
			cur_armor->o_ac++;
		    }
		when 'E':
		    /*
		     * The gaze of the floating eye hypnotizes you
		     */
		    if (on(player, ISBLIND))
			break;
		    if (!no_command)
		    {
			addmsg("You are transfixed");
			if (!terse)
			    addmsg(" by the gaze of the floating eye.");
			endmsg();
		    }
		    no_command += rnd(2)+2;
		    if (no_command > 100 && food_left <= 0)
		    	death('E');
		when 'A':
		    /*
		     * Ants have poisonous bites
		     */
		    if (!save(VS_POISON))
			if (!ISWEARING(R_SUSTSTR))
			{
			    chg_str(-1);
			    if (!terse)
				msg("You feel a sting in your arm and now feel weaker");
			    else
				msg("A sting has weakened you");
			}
			else
			    if (!terse)
				msg("A sting momentarily weakens you");
			    else
				msg("Sting has no effect");
		when 'W':
		    /*
		     * Wraiths might drain energy levels
		     */
		    if (rnd(100) < 15)
		    {
			int fewer;

			if (pstats.s_exp == 0)
			    death('W');		/* All levels gone */
			msg("You suddenly feel weaker.");
			if (--pstats.s_lvl == 0)
			{
			    pstats.s_exp = 0;
			    pstats.s_lvl = 1;
			}
			else
			    pstats.s_exp = e_levels[pstats.s_lvl-1]+1;
			fewer = roll(1, 10);
			pstats.s_hpt -= fewer;
			max_hp -= fewer;
			if (pstats.s_hpt < 1)
			    pstats.s_hpt = 1;
			if (max_hp < 1)
			    death('W');
		    }
		when 'F':
		    /*
		     * Violet fungi stops the poor guy from moving
		     */
		    player.t_flags |= ISHELD;
		    sprintf(monsters['F'-'A'].m_stats.s_dmg,"%dd1",++fung_hit);
		when 'L':
		{
		    /*
		     * Leperachaun steals some gold
		     */
		    int lastpurse;

		    lastpurse = purse;
		    purse -= GOLDCALC;
		    if (!save(VS_MAGIC))
			purse -= GOLDCALC + GOLDCALC + GOLDCALC + GOLDCALC;
		    if (purse < 0)
			purse = 0;
		    if (purse != lastpurse)
			msg("Your purse feels lighter");
		    remove_monster(&mp->t_pos, find_mons(mp->t_pos.y, mp->t_pos.x));
		    mp = NULL;
		}
		when 'N':
		{
		    struct linked_list *list, *steal;
		    struct object *obj;
		    int nobj;

		    /*
		     * Nymph's steal a magic item, look through the pack
		     * and pick out one we like.
		     */
		    steal = NULL;
		    for (nobj = 0, list = pack; list != NULL; list = next(list))
		    {
			obj = (struct object *) ldata(list);
			if (obj != cur_armor && 
                            obj != cur_weapon &&
                            obj != cur_ring[LEFT] &&
                            obj != cur_ring[RIGHT] && /* Nymph bug fix */
			    is_magic(obj) && 
                            rnd(++nobj) == 0)
				steal = list;
		    }
		    if (steal != NULL)
		    {
			struct object *sobj;

			sobj = (struct object *) ldata(steal);
			remove_monster(&mp->t_pos, find_mons(mp->t_pos.y, mp->t_pos.x));
			mp = NULL;
			if (sobj->o_count > 1 && sobj->o_group == 0)
			{
			    int oc;

			    oc = sobj->o_count;
			    sobj->o_count = 1;
			    msg("She stole %s!", inv_name(sobj, TRUE));
			    sobj->o_count = oc - 1;
			}
			else
			{
			    msg("She stole %s!", inv_name(sobj, TRUE));
			    detach(pack, steal);
			    discard(steal);
			}
			inpack--;
		    }
		}
		otherwise:
		    break;
	    }
    }
    else if (mp->t_type != 'E')
    {
	if (mp->t_type == 'F')
	{
	    pstats.s_hpt -= fung_hit;
	    if (pstats.s_hpt <= 0)
		death(mp->t_type);	/* Bye bye life ... */
	}
	miss(mname, NULL);
    }
    /*
     * Check to see if this is a regenerating monster and let it heal if
     * it is.
     */
    if ((mp != NULL) && (on(*mp, ISREGEN) && rnd(100) < 33))
	mp->t_stats.s_hpt++;
    if (fight_flush)
    {
	flush_type();	/* flush typeahead */
    }
    count = 0;
    status();

    if (mp == NULL)
        return(-1);
    else
        return(0);
}

/*
 * swing:
 *	returns true if the swing hits
 */

int
swing(int at_lvl, int op_arm, int wplus)
{
    int res = rnd(20)+1;
    int need = (21-at_lvl)-op_arm;

    return (res+wplus >= need);
}

/*
 * check_level:
 *	Check to see if the guy has gone up a level.
 */

void
check_level()
{
    int i, add;

    for (i = 0; e_levels[i] != 0; i++)
	if (e_levels[i] > pstats.s_exp)
	    break;
    i++;
    if (i > pstats.s_lvl)
    {
	add = roll(i-pstats.s_lvl,10);
	max_hp += add;
	if ((pstats.s_hpt += add) > max_hp)
	    pstats.s_hpt = max_hp;
	msg("Welcome to level %d", i);
    }
    pstats.s_lvl = i;
}

/*
 * roll_em:
 *	Roll several attacks
 */

int
roll_em(struct stats *att, struct stats *def, struct object *weap, int hurl)
{
    char *cp;
    int ndice, nsides, def_arm;
    int did_hit = FALSE;
    int prop_hplus, prop_dplus;

    prop_hplus = prop_dplus = 0;
    if (weap == NULL)
	cp = att->s_dmg;
    else if (hurl)
	if ((weap->o_flags&ISMISL) && cur_weapon != NULL &&
	  cur_weapon->o_which == weap->o_launch)
	{
	    cp = weap->o_hurldmg;
	    prop_hplus = cur_weapon->o_hplus;
	    prop_dplus = cur_weapon->o_dplus;
	}
	else
	    cp = (weap->o_flags&ISMISL ? weap->o_damage : weap->o_hurldmg);
    else
    {
	cp = weap->o_damage;
	/*
	 * Drain a staff of striking
	 */
	if (weap->o_type == STICK && weap->o_which == WS_HIT
	    && weap->o_charges == 0)
		{
		    strcpy(weap->o_damage,"0d0");
		    weap->o_hplus = weap->o_dplus = 0;
		}
    }
    for (;;)
    {
	int damage;
	int hplus = prop_hplus + (weap == NULL ? 0 : weap->o_hplus);
	int dplus = prop_dplus + (weap == NULL ? 0 : weap->o_dplus);

	if (weap == cur_weapon)
	{
	    if (ISRING(LEFT, R_ADDDAM))
		dplus += cur_ring[LEFT]->o_ac;
	    else if (ISRING(LEFT, R_ADDHIT))
		hplus += cur_ring[LEFT]->o_ac;
	    if (ISRING(RIGHT, R_ADDDAM))
		dplus += cur_ring[RIGHT]->o_ac;
	    else if (ISRING(RIGHT, R_ADDHIT))
		hplus += cur_ring[RIGHT]->o_ac;
	}
	ndice = atoi(cp);
	if ((cp = strchr(cp, 'd')) == NULL)
	    break;
	nsides = atoi(++cp);
	if (def == &pstats)
	{
	    if (cur_armor != NULL)
		def_arm = cur_armor->o_ac;
	    else
		def_arm = def->s_arm;
	    if (ISRING(LEFT, R_PROTECT))
		def_arm -= cur_ring[LEFT]->o_ac;
	    else if (ISRING(RIGHT, R_PROTECT))
		def_arm -= cur_ring[RIGHT]->o_ac;
	}
	else
	    def_arm = def->s_arm;
	if (swing(att->s_lvl, def_arm, hplus+str_plus(&att->s_str)))
	{
	    int proll;

	    proll = roll(ndice, nsides);
	    if (ndice + nsides > 0 && proll < 1)
		debug("Damage for %dd%d came out %d.", ndice, nsides, proll);
	    damage = dplus + proll + add_dam(&att->s_str);
	    def->s_hpt -= max(0, damage);
	    did_hit = TRUE;
	}
	if ((cp = strchr(cp, '/')) == NULL)
	    break;
	cp++;
    }
    return did_hit;
}

/*
 * prname:
 *	The print name of a combatant
 */

char *
prname(who, upper)
char *who;
int upper;
{
    static char tbuf[80];

    *tbuf = '\0';
    if (who == 0)
	strcpy(tbuf, "you"); 
    else if (on(player, ISBLIND))
	strcpy(tbuf, "it");
    else
    {
	strcpy(tbuf, "the ");
	strcat(tbuf, who);
    }
    if (upper)
	*tbuf = toupper(*tbuf);
    return tbuf;
}

/*
 * hit:
 *	Print a message to indicate a succesful hit
 */

void
hit(char *er, char *ee)
{
    char *s = "";

    addmsg(prname(er, TRUE));
    if (terse)
	s = " hit.";
    else
	switch (rnd(4))
	{
	    case 0: s = " scored an excellent hit on ";
	    when 1: s = " hit ";
	    when 2: s = (er == 0 ? " have injured " : " has injured ");
	    when 3: s = (er == 0 ? " swing and hit " : " swings and hits ");
	}
    addmsg(s);
    if (!terse)
	addmsg(prname(ee, FALSE));
    endmsg();
}

/*
 * miss:
 *	Print a message to indicate a poor swing
 */

void
miss(char *er, char *ee)
{
    char *s = "";

    addmsg(prname(er, TRUE));
    switch (terse ? 0 : rnd(4))
    {
	case 0: s = (er == 0 ? " miss" : " misses");
	when 1: s = (er == 0 ? " swing and miss" : " swings and misses");
	when 2: s = (er == 0 ? " barely miss" : " barely misses");
	when 3: s = (er == 0 ? " don't hit" : " doesn't hit");
    }
    addmsg(s);
    if (!terse)
	addmsg(" %s", prname(ee, FALSE));
    endmsg();
}

/*
 * save_throw:
 *	See if a creature save against something
 */
int
save_throw(int which, struct thing *tp)
{
    int need;

    need = 14 + which - tp->t_stats.s_lvl / 2;
    return (roll(1, 20) >= need);
}

/*
 * save:
 *	See if he saves against various nasty things
 */

int
save(int which)
{
    return save_throw(which, &player);
}

/*
 * str_plus:
 *	compute bonus/penalties for strength on the "to hit" roll
 */

int
str_plus(str_t *str)
{
    if (str->st_str == 18)
    {
	if (str->st_add == 100)
	    return 3;
	if (str->st_add > 50)
	    return 2;
    }
    if (str->st_str >= 17)
	return 1;
    if (str->st_str > 6)
	return 0;
    return str->st_str - 7;
}

/*
 * add_dam:
 *	compute additional damage done for exceptionally high or low strength
 */

 int
 add_dam(str_t *str)
 {
    if (str->st_str == 18)
    {
	if (str->st_add == 100)
	    return 6;
	if (str->st_add > 90)
	    return 5;
	if (str->st_add > 75)
	    return 4;
	if (str->st_add != 0)
	    return 3;
	return 2;
    }
    if (str->st_str > 15)
	return 1;
    if (str->st_str > 6)
	return 0;
    return str->st_str - 7;
}

/*
 * raise_level:
 *	The guy just magically went up a level.
 */

void
raise_level()
{
    pstats.s_exp = e_levels[pstats.s_lvl-1] + 1L;
    check_level();
}

/*
 * thunk:
 *	A missile hits a monster
 */

void
thunk(struct object *weap, char *mname)
{
    if (weap->o_type == WEAPON)
	msg("The %s hits the %s", w_names[weap->o_which], mname);
    else
	msg("You hit the %s.", mname);
}

/*
 * bounce:
 *	A missile misses a monster
 */

void
bounce(struct object *weap, char *mname)
{
    if (weap->o_type == WEAPON)
	msg("The %s misses the %s", w_names[weap->o_which], mname);
    else
	msg("You missed the %s.", mname);
}

/*
 * remove a monster from the screen
 */
void
remove_monster(coord *mp, struct linked_list *item)
{
    mvwaddch(mw, mp->y, mp->x, ' ');
    mvwaddch(cw, mp->y, mp->x, ((struct thing *) ldata(item))->t_oldch);
    detach(mlist, item);
    discard(item);
}

/*
 * is_magic:
 *	Returns true if an object radiates magic
 */

int
is_magic(struct object *obj)
{
    switch (obj->o_type)
    {
	case ARMOR:
	    return obj->o_ac != a_class[obj->o_which];
	when WEAPON:
	    return obj->o_hplus != 0 || obj->o_dplus != 0;
	when POTION:
	case SCROLL:
	case STICK:
	case RING:
	case AMULET:
	    return TRUE;
    }
    return FALSE;
}

/*
 * killed:
 *	Called to put a monster to death
 */

void
killed(struct linked_list *item, int pr)
{
    struct thing *tp;
    struct linked_list *pitem, *nexti;

    tp = (struct thing *) ldata(item);
    if (pr)
    {
	addmsg(terse ? "Defeated " : "You have defeated ");
	if (on(player, ISBLIND))
	    msg("it.");
	else
	{
	    if (!terse)
		addmsg("the ");
	    msg("%s.", monsters[tp->t_type-'A'].m_name);
	}
    }
    pstats.s_exp += tp->t_stats.s_exp;
    /*
     * Do adjustments if he went up a level
     */
    check_level();
    /*
     * If the monster was a violet fungi, un-hold him
     */
    switch (tp->t_type)
    {
	case 'F':
	    player.t_flags &= ~ISHELD;
	    fung_hit = 0;
	    strcpy(monsters['F'-'A'].m_stats.s_dmg, "000d0");
	when 'L':
	{
	    struct room *rp;

	    if ((rp = roomin(&tp->t_pos)) == NULL)
		break;
	    if (rp->r_goldval != 0 || fallpos(&tp->t_pos,&rp->r_gold,FALSE))
	    {
		rp->r_goldval += GOLDCALC;
		if (save(VS_MAGIC))
		    rp->r_goldval += GOLDCALC + GOLDCALC
				   + GOLDCALC + GOLDCALC;
		mvwaddch(stdscr, rp->r_gold.y, rp->r_gold.x, GOLD);
		if (!(rp->r_flags & ISDARK))
		{
		    light(&hero);
		    mvwaddch(cw, hero.y, hero.x, PLAYER);
		}
	    }
	}
    }
    /*
     * Empty the monsters pack
     */
    pitem = tp->t_pack;
    while (pitem != NULL)
    {
	struct object *obj;

	nexti = next(tp->t_pack);
	obj = (struct object *) ldata(pitem);
	obj->o_pos = tp->t_pos;
	detach(tp->t_pack, pitem);
	fall(pitem, FALSE);
	pitem = nexti;
    }
    /*
     * Get rid of the monster.
     */
    remove_monster(&tp->t_pos, item);
}