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template <int esize> | |
class Bitset | |
{ | |
public: | |
static const int bsize = esize / 64 + (esize % 64 ? 1 : 0); | |
uint64 data[bsize]; | |
uint which_byte(uint n) const | |
{ | |
for (uint b = 0; b < bsize; b++) { | |
if (n < (b + 1) * 64) | |
return b; | |
} | |
return (uint)-1; | |
} | |
void set(uint n, bool v) | |
{ | |
uint b = which_byte(n); | |
if (b >= bsize) | |
return; | |
int bit = n % 64; | |
data[b] = (data[b] & ~(1 << bit)) | ((uint64)v << bit); | |
} | |
bool at(uint n) const | |
{ | |
uint b = which_byte(n); | |
if (b >= bsize) | |
return false; | |
return (bool)(data[b] & (1 << (n % 64))); | |
} | |
bool all() const | |
{ | |
uint b; | |
for (b = 0; b < esize / 64; b++) | |
if (data[b] != (uint64)-1) | |
return false; | |
if (esize % 64) { | |
uint64 bitmask = ~(1ULL << ((esize % 64) - 1)); | |
if ((data[b] & bitmask) != bitmask) | |
return false; | |
} | |
return true; | |
} | |
bool none() const | |
{ | |
uint b; | |
for (b = 0; b < esize / 64; b++) | |
if (data[b] != (uint64)0) | |
return false; | |
if (esize % 64) { | |
uint64 bitmask = ~(1ULL << ((esize % 64) - 1)); | |
if ((data[b] & bitmask) != 0) | |
return false; | |
} | |
return true; | |
} | |
bool any() const | |
{ | |
return !none(); | |
} | |
uint count() const | |
{ | |
if (all()) | |
return esize; | |
if (none()) | |
return 0; | |
uint c = 0, b; | |
for (b = 0; b < esize / 64; b++) | |
for (uint i = 0; i < 64; i++) | |
if (data[b] & (1 << i)) | |
c++; | |
uint mod = esize % 64; | |
if (mod) { | |
for (uint i = 0; i < mod; i++) | |
if (data[b] & (1 << i)) | |
c++; | |
} | |
return c; | |
} | |
void reset() | |
{ | |
memset(data, 0x00, bsize * 8); | |
} | |
void reset(uint n) | |
{ | |
set(n, false); | |
} | |
void set() | |
{ | |
memset(data, 0xFF, bsize * 8); | |
} | |
void set(uint n) | |
{ | |
set(n, true); | |
} | |
}; |
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