bitset question
Author
let say:
bitset<256> Status;
how should be the flags defined in order to still use bitwise operators?
like this?
#define FLAG1 0x0000
#define FLAG2 0x0001
now, when i want to pass a combo of flags to the Status, i say:
SetStatus(const UInt64& lNewStatus);
SetStatus(FLAG1 | FLAG2);
but this still keeps me under 64 bit limit (because of the 64bit int).
how should i pass flags?
I use them like this. May not be the best way but it works fine.
I don't know if thats a good example, but it should show what I'm talking about...
-UltimaX-
"You wished for a white christmas... Now go shovel your wishes!"
[edited by - UltimaX on July 28, 2003 5:40:18 PM]
enum SampleFlags{ SF_DUMMY01 = (1<<1), SF_DUMMY02 = (1<<2), SF_DUMMY03 = (1<<3), SF_DUMMY03 = (1<<4)};//void SomeFunction(int Flags){ if(Flags & SF_DUMMY01) { //DoSomething }}//SomeFunction(SF_DUMMY01 | SF_DUMMY02);//I don't know if thats a good example, but it should show what I'm talking about...
-UltimaX-
"You wished for a white christmas... Now go shovel your wishes!"
[edited by - UltimaX on July 28, 2003 5:40:18 PM]
Author
@Sneftel
not sure i understand u...
could u give an example?
@UltimaX
void SomeFunction(int Flags)
if int = 32bits, that only gives u 32 flags...
i need more, even more than 64 (uint64)
not sure i understand u...
could u give an example?
@UltimaX
void SomeFunction(int Flags)
if int = 32bits, that only gives u 32 flags...
i need more, even more than 64 (uint64)
std::vector<bool>// compiles down to a bitset class// you can access each element by using the [] operators.//you can use it like this..std::vector<bool> myBitset(n);enum { FLAG1 = 0, FLAG2, ... FLAGn}if( myBitset[FLAG1] ){ // do whatever}A GOOD friend will come bail you out of jail...
but, a TRUE friend will be sitting next to you saying, "Damn, we fucked up."
Ingite 3D Game Engine Home -- Just click it
[edited by - silvermace on July 28, 2003 5:50:22 PM]
Author
@silvermace
access is not the issue here...
what i''m trying to do:
before, i had this:
UInt64 mStatus;
and could do this:
SetStatus(UInt64 flags)
{
mStatus = flags;
}
AddStatus(UInt64 flags)
{
mStatus = mStatus | flags;
}
the question is, how do i do this with bitset (and ability to go over 64 bits)???
access is not the issue here...
what i''m trying to do:
class CStatus{//con,desprivate:std::bitset<256> mStatus;};before, i had this:
UInt64 mStatus;
and could do this:
SetStatus(UInt64 flags)
{
mStatus = flags;
}
AddStatus(UInt64 flags)
{
mStatus = mStatus | flags;
}
the question is, how do i do this with bitset (and ability to go over 64 bits)???
quote:
AddStatus(UInt64 flags)
{
mStatus = mStatus | flags;
}
void AddStatus(const std::bitset<256> &flags){ mStatus = mStatus | flags;}How appropriate. You fight like a cow.
[edited by - sneftel on July 28, 2003 6:20:21 PM]
Author
quote:
I gotta ask: under what circumstances do you have 256 separate flags, which don''t take to being referenced by number rather than by name?
my knowledge of english isn''t perfect.
so, i dont understand the second part of the question
"which dont take to being" ???
256 was an example, i found out that 64 wouldn''t be enough...
that''s why i''m switching to bitset
Well, here''s the thing. If you''re using named flags, then obviously each of those flags has a separate meaning: You''ll have, say, one flag named FLAG_DEAD, one named FLAG_RED_HAIRED, one named FLAG_HUNGRY, etc. Do you actually have 256 of them? or are they really more like FLAG_HAS_KEY_0, FLAG_HAS_KEY_1, FLAG_HAS_KEY_2, etc?
How appropriate. You fight like a cow.
How appropriate. You fight like a cow.
Author
well, they all have names/diffrent meanings. i don't have YET 256 flags, but like i said, after a quick calculation, i found out that 64 just wont cut it. so, how they say it? better safe then sorry???
btw: ur solution works perfectly, tnx
one more btw:
is there a faster/better solution?
[edited by - original vesoljc on July 28, 2003 7:31:20 PM]
btw: ur solution works perfectly, tnx
one more btw:
is there a faster/better solution?
INLINE axpConcreteStatus& axpConcreteStatus::operator -= (const std::bitset<axpStatusSize>& lStatus){ std::bitset<axpStatusSize> lRightInvert; std::bitset<axpStatusSize> lAllSet; lAllSet.set(); lRightInvert = lStatus ^ lAllSet; mStatus &= lRightInvert; return(*this);}[edited by - original vesoljc on July 28, 2003 7:31:20 PM]
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