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- Added a big-endian fix for actor flag fields that aren't four bytes wide.

Browse source 
SVN r4251 (trunk)
This commit is contained in:
Randy Heit 2013-05-05 00:01:51 +00:00
parent 40f7abb8e9
commit 9072c25e65
5 changed files with 99 additions and 32 deletions
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5
src/thingdef/thingdef.h
View file

@ -22,12 +22,15 @@ struct FFlagDef
unsigned int flagbit;
const char *name;
int structoffset;
int fieldsize;
};
FFlagDef *FindFlag (const PClass *type, const char *part1, const char *part2);
void HandleDeprecatedFlags(AActor *defaults, FActorInfo *info, bool set, int index);
bool CheckDeprecatedFlags(AActor *actor, FActorInfo *info, int index);
bool CheckDeprecatedFlags(const AActor *actor, FActorInfo *info, int index);
const char *GetFlagName(unsigned int flagnum, int flagoffset);
void ModActorFlag(AActor *actor, FFlagDef *fd, bool set);
INTBOOL CheckActorFlag(const AActor *actor, FFlagDef *fd);
#define FLAG_NAME(flagnum, flagvar) GetFlagName(flagnum, myoffsetof(AActor, flagvar))

17
src/thingdef/thingdef_codeptr.cpp
View file

@ -3629,14 +3629,7 @@ DEFINE_ACTION_FUNCTION_PARAMS(AActor, A_ChangeFlag)
bool linkchange = flagp == &self->flags && (fd->flagbit == MF_NOBLOCKMAP || fd->flagbit == MF_NOSECTOR);
if (linkchange) self->UnlinkFromWorld();
if (expression)
{
*flagp |= fd->flagbit;
}
else
{
*flagp &= ~fd->flagbit;
}
ModActorFlag(self, fd, expression);
if (linkchange) self->LinkToWorld();
}
kill_after = self->CountsAsKill();
@ -3721,13 +3714,7 @@ DEFINE_ACTION_FUNCTION_PARAMS(AActor, A_CheckFlag)
if (fd != NULL)
{
if (fd->structoffset == -1)
{
if (CheckDeprecatedFlags(owner, cls->ActorInfo, fd->flagbit)) {
ACTION_JUMP(jumpto);
}
}
else if ( fd->flagbit & *(DWORD*)(((char*)owner) + fd->structoffset))
if (CheckActorFlag(owner, fd))
{
ACTION_JUMP(jumpto);
}

8
src/thingdef/thingdef_data.cpp
View file

@ -55,10 +55,10 @@ static TArray<FVariableInfo*> variables;
//==========================================================================
// [RH] Keep GCC quiet by not using offsetof on Actor types.
#define DEFINE_FLAG(prefix, name, type, variable) { prefix##_##name, #name, (int)(size_t)&((type*)1)->variable - 1 }
#define DEFINE_FLAG2(symbol, name, type, variable) { symbol, #name, (int)(size_t)&((type*)1)->variable - 1 }
#define DEFINE_DEPRECATED_FLAG(name) { DEPF_##name, #name, -1 }
#define DEFINE_DUMMY_FLAG(name) { DEPF_UNUSED, #name, -1 }
#define DEFINE_FLAG(prefix, name, type, variable) { prefix##_##name, #name, (int)(size_t)&((type*)1)->variable - 1, sizeof(((type *)0)->variable) }
#define DEFINE_FLAG2(symbol, name, type, variable) { symbol, #name, (int)(size_t)&((type*)1)->variable - 1, sizeof(((type *)0)->variable) }
#define DEFINE_DEPRECATED_FLAG(name) { DEPF_##name, #name, -1, 0 }
#define DEFINE_DUMMY_FLAG(name) { DEPF_UNUSED, #name, -1, 0 }
static FFlagDef ActorFlags[]=
{

10
src/thingdef/thingdef_parse.cpp
View file

@ -441,15 +441,7 @@ void HandleActorFlag(FScanner &sc, Baggage &bag, const char *part1, const char *
}
else
{
DWORD * flagvar = (DWORD*) ((char*)defaults + fd->structoffset);
if (mod == '+')
{
*flagvar |= fd->flagbit;
}
else
{
*flagvar &= ~fd->flagbit;
}
ModActorFlag(defaults, fd, mod == '+');
}
}
else

91
src/thingdef/thingdef_properties.cpp
View file

@ -95,6 +95,91 @@ static const PClass *FindClassTentative(const char *name, const char *ancestor)
return cls;
}
//==========================================================================
//
// Sets or clears a flag, taking field width into account.
//
//==========================================================================
void ModActorFlag(AActor *actor, FFlagDef *fd, bool set)
{
// Little-Endian machines only need one case, because all field sizes
// start at the same address. (Unless the machine has unaligned access
// exceptions, in which case you'll need multiple cases for it too.)
#ifdef __BIG_ENDIAN__
if (fd->fieldsize == 4)
#endif
{
DWORD *flagvar = (DWORD *)((char *)actor + fd->structoffset);
if (set)
{
*flagvar |= fd->flagbit;
}
else
{
*flagvar &= ~fd->flagbit;
}
}
#ifdef __BIG_ENDIAN__
else if (fd->fieldsize == 2)
{
WORD *flagvar = (WORD *)((char *)actor + fd->structoffset);
if (set)
{
*flagvar |= fd->flagbit;
}
else
{
*flagvar &= ~fd->flagbit;
}
}
else
{
assert(fd->fieldsize == 1);
BYTE *flagvar = (BYTE *)((char *)actor + fd->structoffset);
if (set)
{
*flagvar |= fd->flagbit;
}
else
{
*flagvar &= ~fd->flagbit;
}
}
#endif
}
//==========================================================================
//
// Returns whether an actor flag is true or not.
//
//==========================================================================
INTBOOL CheckActorFlag(const AActor *owner, FFlagDef *fd)
{
if (fd->structoffset == -1)
{
return CheckDeprecatedFlags(owner, owner->GetClass()->ActorInfo, fd->flagbit);
}
else
#ifdef __BIG_ENDIAN__
if (fd->fieldsize == 4)
#endif
{
return fd->flagbit & *(DWORD *)(((char*)owner) + fd->structoffset);
}
#ifdef __BID_ENDIAN__
else if (fd->fieldsize == 2)
{
return fd->flagbit & *(WORD *)(((char*)owner) + fd->structoffset);
}
else
{
assert(fd->fieldsize == 1);
return fd->flagbit & *(BYTE *)(((char*)owner) + fd->structoffset);
}
#endif
}
//===========================================================================
//
// HandleDeprecatedFlags
@ -170,7 +255,7 @@ void HandleDeprecatedFlags(AActor *defaults, FActorInfo *info, bool set, int ind
//
//===========================================================================
bool CheckDeprecatedFlags(AActor *actor, FActorInfo *info, int index)
bool CheckDeprecatedFlags(const AActor *actor, FActorInfo *info, int index)
{
// A deprecated flag is false if
// a) it hasn't been added here
@ -211,11 +296,11 @@ bool CheckDeprecatedFlags(AActor *actor, FActorInfo *info, int index)
return (actor->BounceFlags & (BOUNCE_TypeMask|BOUNCE_UseSeeSound)) == BOUNCE_DoomCompat;
case DEPF_PICKUPFLASH:
return static_cast<AInventory*>(actor)->PickupFlash == PClass::FindClass("PickupFlash");
return static_cast<const AInventory*>(actor)->PickupFlash == PClass::FindClass("PickupFlash");
// A pure name lookup may or may not be more efficient, but I know no static identifier for PickupFlash.
case DEPF_INTERHUBSTRIP:
return !(static_cast<AInventory*>(actor)->InterHubAmount);
return !(static_cast<const AInventory*>(actor)->InterHubAmount);
}
return false; // Any entirely unknown flag is not set