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Backport some undefined-behaviour fixes

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This commit is contained in:
Clownacy 2020-07-06 15:10:01 +01:00
parent ffa4b16376
commit 220f48a98b
6 changed files with 114 additions and 41 deletions
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7
src/Bullet.cpp
View file

@ -1641,7 +1641,12 @@ void ActBullet_Edge(BULLET *bul)
bul->damage = 1;
if (bul->ani_no > 4)
{
bul->cond = 0;
#ifdef FIX_BUGS
return; // The code below will use 'ani_no' to access 'rcLeft' and 'rcRight', even though it's now too high
#endif
}
break;
}
@ -1662,8 +1667,6 @@ void ActBullet_Edge(BULLET *bul)
{96, 88, 120, 112},
};
// Note that 'bul->ani_no' can exceed the size of 'rcLeft' and 'rcRight'
if (bul->direct == 0)
bul->rect = rcLeft[bul->ani_no];
else

97
src/Caret.cpp
View file

@ -71,11 +71,15 @@ void ActCaret01(CARET *crt)
if (++crt->ani_wait > 5)
{
crt->ani_wait = 0;
if (++crt->ani_no > 3)
crt->cond = 0;
}
// Note that 'crt->ani_no' can exceed the size of 'rcLeft' and 'rcRight'
if (++crt->ani_no > 3)
{
crt->cond = 0;
#ifdef FIX_BUGS
return; // The code below will use 'ani_no' to access 'rcLeft' and 'rcRight', even though it's now too high
#endif
}
}
if (crt->direct == 0)
crt->rect = rcLeft[crt->ani_no];
@ -118,9 +122,12 @@ void ActCaret02(CARET *crt)
}
if (crt->ani_no > 3)
{
crt->cond = 0;
// Note that 'crt->ani_no' can exceed the size of 'rect_left'
#ifdef FIX_BUGS
return; // The code below will use 'ani_no' to access 'rect_left', even though it's now too high
#endif
}
crt->rect = rect_left[crt->ani_no];
break;
@ -133,9 +140,12 @@ void ActCaret02(CARET *crt)
}
if (crt->ani_no > 3)
{
crt->cond = 0;
// Note that 'crt->ani_no' can exceed the size of 'rect_right'
#ifdef FIX_BUGS
return; // The code below will use 'ani_no' to access 'rect_right', even though it's now too high
#endif
}
crt->rect = rect_right[crt->ani_no];
break;
@ -162,11 +172,15 @@ void ActCaret03(CARET *crt)
if (++crt->ani_wait > 2)
{
crt->ani_wait = 0;
if (++crt->ani_no > 3)
crt->cond = 0;
}
// Note that 'crt->ani_no' can exceed the size of 'rect'
if (++crt->ani_no > 3)
{
crt->cond = 0;
#ifdef FIX_BUGS
return; // The code below will use 'ani_no' to access 'rect', even though it's now too high
#endif
}
}
crt->rect = rect[crt->ani_no];
}
@ -177,9 +191,11 @@ void ActCaret04(CARET *crt)
{64, 32, 80, 48},
{80, 32, 96, 48},
{96, 32, 112, 48},
{64, 48, 80, 64},
{80, 48, 96, 64},
{96, 48, 112, 64},
{64, 64, 80, 80},
{80, 64, 96, 80},
{96, 64, 112, 80},
@ -190,7 +206,12 @@ void ActCaret04(CARET *crt)
crt->ani_wait = 0;
if (++crt->ani_no > 2)
{
crt->cond = 0;
#ifdef FIX_BUGS
return; // The code below will use 'ani_no' to access 'rect', even though it's now too high
#endif
}
}
crt->rect = rect[(crt->direct * 3) + crt->ani_no];
@ -215,13 +236,16 @@ void ActCaret05(CARET *crt)
}
if (crt->ani_no > 6)
{
crt->cond = 0;
#ifdef FIX_BUGS
return; // The code below will use 'ani_no' to access 'rect', even though it's now too high
#endif
}
crt->x += 0x80;
crt->y -= 0x80;
// Note that 'crt->ani_no' can exceed the size of 'rect'
crt->rect = rect[crt->ani_no];
}
@ -242,10 +266,13 @@ void ActCaret07(CARET *crt)
crt->ani_wait = 0;
if (++crt->ani_no > 6)
{
crt->cond = 0;
#ifdef FIX_BUGS
return; // The code below will use 'ani_no' to access 'rcLeft', even though it's now too high
#endif
}
}
// Note that 'crt->ani_no' can exceed the size of rcLeft
crt->rect = rcLeft[crt->ani_no];
@ -359,11 +386,15 @@ void ActCaret11(CARET *crt)
if (++crt->ani_wait > 2)
{
crt->ani_wait = 0;
if (++crt->ani_no > 6)
crt->cond = 0;
}
// Note that 'crt->ani_no' can exceed the size of 'rcRight'
if (++crt->ani_no > 6)
{
crt->cond = 0;
#ifdef FIX_BUGS
return; // The code below will use 'ani_no' to access 'rcRight', even though it's now too high
#endif
}
}
crt->rect = rcRight[crt->ani_no];
}
@ -378,11 +409,15 @@ void ActCaret12(CARET *crt)
if (++crt->ani_wait > 2)
{
crt->ani_wait = 0;
if (++crt->ani_no > 1)
crt->cond = 0;
}
// Note that 'crt->ani_no' can exceed the size of 'rcLeft'
if (++crt->ani_no > 1)
{
crt->cond = 0;
#ifdef FIX_BUGS
return; // The code below will use 'ani_no' to access 'rcLeft', even though it's now too high
#endif
}
}
crt->rect = rcLeft[crt->ani_no];
}
@ -446,10 +481,13 @@ void ActCaret14(CARET *crt)
crt->ani_wait = 0;
if (++crt->ani_no > 4)
{
crt->cond = 0;
#ifdef FIX_BUGS
return; // The code below will use 'ani_no' to access 'rect', even though it's now too high
#endif
}
}
// Note that 'crt->ani_no' can exceed the size of 'rect'
crt->rect = rect[crt->ani_no];
}
@ -468,10 +506,13 @@ void ActCaret15(CARET *crt)
crt->ani_wait = 0;
if (++crt->ani_no > 3)
{
crt->cond = 0;
#ifdef FIX_BUGS
return; // The code below will use 'ani_no' to access 'rcLeft', even though it's now too high
#endif
}
}
// Note that 'crt->ani_no' can exceed the size of 'rcLeft'
crt->rect = rcLeft[crt->ani_no];
}

10
src/MycParam.cpp
View file

@ -270,8 +270,16 @@ void PutArmsEnergy(BOOL flash)
RECT rcExpMax = {40, 72, 80, 80};
RECT rcExpFlash = {40, 80, 80, 88};
// Note that this can result in '-1', causing the following array accesses to be out-of-bounds
int lv = gArmsData[gSelectedArms].level - 1;
#ifdef FIX_BUGS
// When the player has no weapons, the default level is 0, which becomes -1.
// Catch it, and set it to 0 instead, so the following array-accesses aren't
// out-of-bounds.
if (lv < 0)
lv = 0;
#endif
int arms_code = gArmsData[gSelectedArms].code;
int exp_now = gArmsData[gSelectedArms].exp;
int exp_next = gArmsLevelTable[arms_code].exp[lv];

31
src/NpcAct120.cpp
View file

@ -585,11 +585,15 @@ void ActNpc127(NPCHAR *npc)
if (++npc->ani_wait > 0)
{
npc->ani_wait = 0;
if (++npc->ani_no > 2)
npc->cond = 0;
}
// Note that 'npc->ani_no' can exceed the size of 'rcH' and 'rcV'
if (++npc->ani_no > 2)
{
npc->cond = 0;
#ifdef FIX_BUGS
return; // The code below will use 'ani_no' to access 'rcH' and 'rcV', even though it's now too high
#endif
}
}
if (npc->direct == 0)
npc->rect = rcH[npc->ani_no];
@ -649,9 +653,12 @@ void ActNpc128(NPCHAR *npc)
}
if (++npc->ani_no > 4)
{
npc->cond = 0;
// Note that 'npc->ani_no' can exceed the bounds of 'rcLeft', 'rcUp', 'rcRight' and 'rcDown'
#ifdef FIX_BUGS
return; // The code below will use 'ani_no' to access 'rcLeft' and co., even though it's now too high
#endif
}
switch (npc->direct)
{
@ -680,18 +687,23 @@ void ActNpc129(NPCHAR *npc)
{0x80, 0x30, 0x90, 0x40},
{0x90, 0x30, 0xA0, 0x40},
{0xA0, 0x30, 0xB0, 0x40},
{0x80, 0x40, 0x90, 0x50},
{0x90, 0x40, 0xA0, 0x50},
{0xA0, 0x40, 0xB0, 0x50},
{0x80, 0x50, 0x90, 0x60},
{0x90, 0x50, 0xA0, 0x60},
{0xA0, 0x50, 0xB0, 0x60},
{0xB0, 0x30, 0xC0, 0x40},
{0xC0, 0x30, 0xD0, 0x40},
{0xD0, 0x30, 0xE0, 0x40},
{0xB0, 0x40, 0xC0, 0x50},
{0xC0, 0x40, 0xD0, 0x50},
{0xD0, 0x40, 0xE0, 0x50},
{0xB0, 0x50, 0xC0, 0x60},
{0xC0, 0x50, 0xD0, 0x60},
{0xD0, 0x50, 0xE0, 0x60},
@ -702,13 +714,16 @@ void ActNpc129(NPCHAR *npc)
npc->ani_wait = 0;
if (++npc->ani_no > 2)
{
npc->cond = 0;
#ifdef FIX_BUGS
return; // The code below will use 'ani_no' to access 'rect', even though it's now too high
#endif
}
}
npc->y += npc->ym;
// Note that '(npc->direct * 3) + npc->ani_no' can exceed the size of 'rect'
npc->rect = rect[(npc->direct * 3) + npc->ani_no];
}

4
src/NpcAct140.cpp
View file

@ -753,12 +753,14 @@ void ActNpc146(NPCHAR *npc)
{
SetDestroyNpChar(npc->x, npc->y, 0x1000, 8);
npc->cond = 0;
#ifdef FIX_BUGS
return; // The code below will use 'ani_no' to access 'rect', even though it's now too high
#endif
}
break;
}
// Note that 'npc->ani_no' can exceed the size of 'rect'
npc->rect = rect[npc->ani_no];
}

6
src/NpcAct180.cpp
View file

@ -1426,11 +1426,15 @@ void ActNpc199(NPCHAR *npc)
}
if (npc->ani_no > 4)
{
npc->cond = 0;
#ifdef FIX_BUGS
return; // The code below will use 'ani_no' to access 'rect', even though it's now too high
#endif
}
npc->x += npc->xm;
npc->y += npc->ym;
// Note that 'npc->ani_no' can exceed the size of 'rect'
npc->rect = rect[npc->ani_no];
}