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fix github issue #352 - geno'd monsters in quest

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The recent change to mkclass() was letting genocided monsters be
created when role-specific monsters were chosen for quest levels.

makemon(Null) -> rndmonst() -> qt_montype() -> mkclass() -> mk_gen_ok()
was accepting members of the quest-specified class even when they
should have been rejected.  I'm still not sure why the revised bit
manipulation didn't work as intended; the re-revised code does.

G_IGNORE was a bug waiting to happen since it gets passed to
mkclass() as a mons[].geno flag but is used to control the use of
mvitals[].mvflags values.  It's still being misused but at least
it doesn't conflict with any of the other flags now.

Fixes #352
This commit is contained in:
PatR
2020-05-30 16:00:29 -07:00
parent e9f53ab7f6
commit 8c1120261a
3 changed files with 30 additions and 19 deletions
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32
src/makemon.c
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@@ -1,4 +1,4 @@
/* NetHack 3.6 makemon.c $NHDT-Date: 1590621476 2020/05/27 23:17:56 $ $NHDT-Branch: NetHack-3.7 $:$NHDT-Revision: 1.171 $ */
/* NetHack 3.6 makemon.c $NHDT-Date: 1590879611 2020/05/30 23:00:11 $ $NHDT-Branch: NetHack-3.7 $:$NHDT-Revision: 1.172 $ */
/* Copyright (c) Stichting Mathematisch Centrum, Amsterdam, 1985. */
/*-Copyright (c) Robert Patrick Rankin, 2012. */
/* NetHack may be freely redistributed. See license for details. */
@@ -16,7 +16,7 @@
static boolean FDECL(uncommon, (int));
static int FDECL(align_shift, (struct permonst *));
static boolean FDECL(mk_gen_ok, (int, int, int));
static boolean FDECL(mk_gen_ok, (int, unsigned, unsigned));
static boolean FDECL(wrong_elem_type, (struct permonst *));
static void FDECL(m_initgrp, (struct monst *, int, int, int, int));
static void FDECL(m_initthrow, (struct monst *, int, int));
@@ -1624,11 +1624,12 @@ rndmonst()
/* decide whether it's ok to generate a candidate monster by mkclass() */
static boolean
mk_gen_ok(mndx, mvflagsmask, genomask)
int mndx, mvflagsmask, genomask;
int mndx;
unsigned mvflagsmask, genomask;
{
struct permonst *ptr = &mons[mndx];
if ((g.mvitals[mndx].mvflags & mvflagsmask) && !(genomask & G_IGNORE))
if (g.mvitals[mndx].mvflags & mvflagsmask)
return FALSE;
if (ptr->geno & genomask)
return FALSE;
@@ -1658,12 +1659,13 @@ int spc;
struct permonst *
mkclass_aligned(class, spc, atyp)
char class;
int spc;
int spc; /* special mons[].geno handling */
aligntyp atyp;
{
register int first, last, num = 0;
int k, nums[SPECIAL_PM + 1]; /* +1: insurance for final return value */
int maxmlev, gmask, gehennom = Inhell != 0;
int maxmlev, gehennom = Inhell != 0;
unsigned mv_mask, gn_mask;
(void) memset((genericptr_t) nums, 0, sizeof nums);
maxmlev = level_difficulty() >> 1;
@@ -1685,6 +1687,13 @@ aligntyp atyp;
return (struct permonst *) 0;
}
mv_mask = G_GONE; /* G_GENOD | G_EXTINCT */
if ((spc & G_IGNORE) != 0) {
mv_mask = 0; /* mv_mask &= ~G_GONE; */
/* G_IGNORE is not a mons[].geno mask so get rid of it now */
spc &= ~G_IGNORE;
}
/* Assumption #2: monsters of a given class are presented in ascending
* order of strength.
*/
@@ -1696,13 +1705,12 @@ aligntyp atyp;
the majority of major demons aren't constrained to Gehennom;
arch- and master liches are always so constrained (for creation;
lesser liches might grow up into them elsewhere) */
gmask = (G_NOGEN | G_UNIQ);
gn_mask = (G_NOGEN | G_UNIQ);
if (rn2(9) || class == S_LICH)
gmask |= (gehennom ? G_NOHELL : G_HELL);
gmask &= ~spc;
gmask |= (spc & G_IGNORE);
gn_mask |= (gehennom ? G_NOHELL : G_HELL);
gn_mask &= ~spc;
if (mk_gen_ok(last, G_GONE, gmask)) {
if (mk_gen_ok(last, mv_mask, gn_mask)) {
/* consider it; don't reject a toostrong() monster if we
don't have anything yet (num==0) or if it is the same
(or lower) difficulty as preceding candidate (non-zero
@@ -1748,7 +1756,7 @@ mkclass_poly(class)
int class;
{
register int first, last, num = 0;
int gmask;
unsigned gmask;
for (first = LOW_PM; first < SPECIAL_PM; first++)
if (mons[first].mlet == class)