320 lines
11 KiB
C++
320 lines
11 KiB
C++
|
#include "BitVector.hpp"
|
||
|
|
|
||
|
|
namespace xcdat {
|
||
|
|
|
||
|
|
// inspired by marisa-trie
|
||
|
|
constexpr uint8_t kSelectTable[9][256] = {
|
||
|
|
{
|
||
|
|
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
|
||
|
|
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
|
||
|
|
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
|
||
|
|
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
|
||
|
|
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
|
||
|
|
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
|
||
|
|
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
|
||
|
|
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
|
||
|
|
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
|
||
|
|
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
|
||
|
|
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
|
||
|
|
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
|
||
|
|
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
|
||
|
|
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
|
||
|
|
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
|
||
|
|
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
|
||
|
|
},
|
||
|
|
{
|
||
|
|
8, 1, 2, 1, 3, 1, 2, 1, 4, 1, 2, 1, 3, 1, 2, 1,
|
||
|
|
5, 1, 2, 1, 3, 1, 2, 1, 4, 1, 2, 1, 3, 1, 2, 1,
|
||
|
|
6, 1, 2, 1, 3, 1, 2, 1, 4, 1, 2, 1, 3, 1, 2, 1,
|
||
|
|
5, 1, 2, 1, 3, 1, 2, 1, 4, 1, 2, 1, 3, 1, 2, 1,
|
||
|
|
7, 1, 2, 1, 3, 1, 2, 1, 4, 1, 2, 1, 3, 1, 2, 1,
|
||
|
|
5, 1, 2, 1, 3, 1, 2, 1, 4, 1, 2, 1, 3, 1, 2, 1,
|
||
|
|
6, 1, 2, 1, 3, 1, 2, 1, 4, 1, 2, 1, 3, 1, 2, 1,
|
||
|
|
5, 1, 2, 1, 3, 1, 2, 1, 4, 1, 2, 1, 3, 1, 2, 1,
|
||
|
|
8, 1, 2, 1, 3, 1, 2, 1, 4, 1, 2, 1, 3, 1, 2, 1,
|
||
|
|
5, 1, 2, 1, 3, 1, 2, 1, 4, 1, 2, 1, 3, 1, 2, 1,
|
||
|
|
6, 1, 2, 1, 3, 1, 2, 1, 4, 1, 2, 1, 3, 1, 2, 1,
|
||
|
|
5, 1, 2, 1, 3, 1, 2, 1, 4, 1, 2, 1, 3, 1, 2, 1,
|
||
|
|
7, 1, 2, 1, 3, 1, 2, 1, 4, 1, 2, 1, 3, 1, 2, 1,
|
||
|
|
5, 1, 2, 1, 3, 1, 2, 1, 4, 1, 2, 1, 3, 1, 2, 1,
|
||
|
|
6, 1, 2, 1, 3, 1, 2, 1, 4, 1, 2, 1, 3, 1, 2, 1,
|
||
|
|
5, 1, 2, 1, 3, 1, 2, 1, 4, 1, 2, 1, 3, 1, 2, 1
|
||
|
|
},
|
||
|
|
{
|
||
|
|
8, 8, 8, 2, 8, 3, 3, 2, 8, 4, 4, 2, 4, 3, 3, 2,
|
||
|
|
8, 5, 5, 2, 5, 3, 3, 2, 5, 4, 4, 2, 4, 3, 3, 2,
|
||
|
|
8, 6, 6, 2, 6, 3, 3, 2, 6, 4, 4, 2, 4, 3, 3, 2,
|
||
|
|
6, 5, 5, 2, 5, 3, 3, 2, 5, 4, 4, 2, 4, 3, 3, 2,
|
||
|
|
8, 7, 7, 2, 7, 3, 3, 2, 7, 4, 4, 2, 4, 3, 3, 2,
|
||
|
|
7, 5, 5, 2, 5, 3, 3, 2, 5, 4, 4, 2, 4, 3, 3, 2,
|
||
|
|
7, 6, 6, 2, 6, 3, 3, 2, 6, 4, 4, 2, 4, 3, 3, 2,
|
||
|
|
6, 5, 5, 2, 5, 3, 3, 2, 5, 4, 4, 2, 4, 3, 3, 2,
|
||
|
|
8, 8, 8, 2, 8, 3, 3, 2, 8, 4, 4, 2, 4, 3, 3, 2,
|
||
|
|
8, 5, 5, 2, 5, 3, 3, 2, 5, 4, 4, 2, 4, 3, 3, 2,
|
||
|
|
8, 6, 6, 2, 6, 3, 3, 2, 6, 4, 4, 2, 4, 3, 3, 2,
|
||
|
|
6, 5, 5, 2, 5, 3, 3, 2, 5, 4, 4, 2, 4, 3, 3, 2,
|
||
|
|
8, 7, 7, 2, 7, 3, 3, 2, 7, 4, 4, 2, 4, 3, 3, 2,
|
||
|
|
7, 5, 5, 2, 5, 3, 3, 2, 5, 4, 4, 2, 4, 3, 3, 2,
|
||
|
|
7, 6, 6, 2, 6, 3, 3, 2, 6, 4, 4, 2, 4, 3, 3, 2,
|
||
|
|
6, 5, 5, 2, 5, 3, 3, 2, 5, 4, 4, 2, 4, 3, 3, 2
|
||
|
|
},
|
||
|
|
{
|
||
|
|
8, 8, 8, 8, 8, 8, 8, 3, 8, 8, 8, 4, 8, 4, 4, 3,
|
||
|
|
8, 8, 8, 5, 8, 5, 5, 3, 8, 5, 5, 4, 5, 4, 4, 3,
|
||
|
|
8, 8, 8, 6, 8, 6, 6, 3, 8, 6, 6, 4, 6, 4, 4, 3,
|
||
|
|
8, 6, 6, 5, 6, 5, 5, 3, 6, 5, 5, 4, 5, 4, 4, 3,
|
||
|
|
8, 8, 8, 7, 8, 7, 7, 3, 8, 7, 7, 4, 7, 4, 4, 3,
|
||
|
|
8, 7, 7, 5, 7, 5, 5, 3, 7, 5, 5, 4, 5, 4, 4, 3,
|
||
|
|
8, 7, 7, 6, 7, 6, 6, 3, 7, 6, 6, 4, 6, 4, 4, 3,
|
||
|
|
7, 6, 6, 5, 6, 5, 5, 3, 6, 5, 5, 4, 5, 4, 4, 3,
|
||
|
|
8, 8, 8, 8, 8, 8, 8, 3, 8, 8, 8, 4, 8, 4, 4, 3,
|
||
|
|
8, 8, 8, 5, 8, 5, 5, 3, 8, 5, 5, 4, 5, 4, 4, 3,
|
||
|
|
8, 8, 8, 6, 8, 6, 6, 3, 8, 6, 6, 4, 6, 4, 4, 3,
|
||
|
|
8, 6, 6, 5, 6, 5, 5, 3, 6, 5, 5, 4, 5, 4, 4, 3,
|
||
|
|
8, 8, 8, 7, 8, 7, 7, 3, 8, 7, 7, 4, 7, 4, 4, 3,
|
||
|
|
8, 7, 7, 5, 7, 5, 5, 3, 7, 5, 5, 4, 5, 4, 4, 3,
|
||
|
|
8, 7, 7, 6, 7, 6, 6, 3, 7, 6, 6, 4, 6, 4, 4, 3,
|
||
|
|
7, 6, 6, 5, 6, 5, 5, 3, 6, 5, 5, 4, 5, 4, 4, 3
|
||
|
|
},
|
||
|
|
{
|
||
|
|
8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 4,
|
||
|
|
8, 8, 8, 8, 8, 8, 8, 5, 8, 8, 8, 5, 8, 5, 5, 4,
|
||
|
|
8, 8, 8, 8, 8, 8, 8, 6, 8, 8, 8, 6, 8, 6, 6, 4,
|
||
|
|
8, 8, 8, 6, 8, 6, 6, 5, 8, 6, 6, 5, 6, 5, 5, 4,
|
||
|
|
8, 8, 8, 8, 8, 8, 8, 7, 8, 8, 8, 7, 8, 7, 7, 4,
|
||
|
|
8, 8, 8, 7, 8, 7, 7, 5, 8, 7, 7, 5, 7, 5, 5, 4,
|
||
|
|
8, 8, 8, 7, 8, 7, 7, 6, 8, 7, 7, 6, 7, 6, 6, 4,
|
||
|
|
8, 7, 7, 6, 7, 6, 6, 5, 7, 6, 6, 5, 6, 5, 5, 4,
|
||
|
|
8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 4,
|
||
|
|
8, 8, 8, 8, 8, 8, 8, 5, 8, 8, 8, 5, 8, 5, 5, 4,
|
||
|
|
8, 8, 8, 8, 8, 8, 8, 6, 8, 8, 8, 6, 8, 6, 6, 4,
|
||
|
|
8, 8, 8, 6, 8, 6, 6, 5, 8, 6, 6, 5, 6, 5, 5, 4,
|
||
|
|
8, 8, 8, 8, 8, 8, 8, 7, 8, 8, 8, 7, 8, 7, 7, 4,
|
||
|
|
8, 8, 8, 7, 8, 7, 7, 5, 8, 7, 7, 5, 7, 5, 5, 4,
|
||
|
|
8, 8, 8, 7, 8, 7, 7, 6, 8, 7, 7, 6, 7, 6, 6, 4,
|
||
|
|
8, 7, 7, 6, 7, 6, 6, 5, 7, 6, 6, 5, 6, 5, 5, 4
|
||
|
|
},
|
||
|
|
{
|
||
|
|
8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
|
||
|
|
8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 5,
|
||
|
|
8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 6,
|
||
|
|
8, 8, 8, 8, 8, 8, 8, 6, 8, 8, 8, 6, 8, 6, 6, 5,
|
||
|
|
8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7,
|
||
|
|
8, 8, 8, 8, 8, 8, 8, 7, 8, 8, 8, 7, 8, 7, 7, 5,
|
||
|
|
8, 8, 8, 8, 8, 8, 8, 7, 8, 8, 8, 7, 8, 7, 7, 6,
|
||
|
|
8, 8, 8, 7, 8, 7, 7, 6, 8, 7, 7, 6, 7, 6, 6, 5,
|
||
|
|
8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
|
||
|
|
8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 5,
|
||
|
|
8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 6,
|
||
|
|
8, 8, 8, 8, 8, 8, 8, 6, 8, 8, 8, 6, 8, 6, 6, 5,
|
||
|
|
8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7,
|
||
|
|
8, 8, 8, 8, 8, 8, 8, 7, 8, 8, 8, 7, 8, 7, 7, 5,
|
||
|
|
8, 8, 8, 8, 8, 8, 8, 7, 8, 8, 8, 7, 8, 7, 7, 6,
|
||
|
|
8, 8, 8, 7, 8, 7, 7, 6, 8, 7, 7, 6, 7, 6, 6, 5
|
||
|
|
},
|
||
|
|
{
|
||
|
|
8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
|
||
|
|
8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
|
||
|
|
8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
|
||
|
|
8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 6,
|
||
|
|
8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
|
||
|
|
8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7,
|
||
|
|
8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7,
|
||
|
|
8, 8, 8, 8, 8, 8, 8, 7, 8, 8, 8, 7, 8, 7, 7, 6,
|
||
|
|
8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
|
||
|
|
8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
|
||
|
|
8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
|
||
|
|
8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 6,
|
||
|
|
8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
|
||
|
|
8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7,
|
||
|
|
8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7,
|
||
|
|
8, 8, 8, 8, 8, 8, 8, 7, 8, 8, 8, 7, 8, 7, 7, 6
|
||
|
|
},
|
||
|
|
{
|
||
|
|
8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
|
||
|
|
8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
|
||
|
|
8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
|
||
|
|
8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
|
||
|
|
8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
|
||
|
|
8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
|
||
|
|
8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
|
||
|
|
8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7,
|
||
|
|
8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
|
||
|
|
8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
|
||
|
|
8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
|
||
|
|
8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
|
||
|
|
8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
|
||
|
|
8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
|
||
|
|
8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
|
||
|
|
8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7
|
||
|
|
},
|
||
|
|
{
|
||
|
|
8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
|
||
|
|
8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
|
||
|
|
8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
|
||
|
|
8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
|
||
|
|
8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
|
||
|
|
8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
|
||
|
|
8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
|
||
|
|
8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
|
||
|
|
8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
|
||
|
|
8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
|
||
|
|
8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
|
||
|
|
8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
|
||
|
|
8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
|
||
|
|
8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
|
||
|
|
8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
|
||
|
|
8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
uint32_t pop_count(uint32_t bits) {
|
||
|
|
bits = ((bits & 0xAAAAAAAA) >> 1) + (bits & 0x55555555);
|
||
|
|
bits = ((bits & 0xCCCCCCCC) >> 2) + (bits & 0x33333333);
|
||
|
|
bits = ((bits >> 4) + bits) & 0x0F0F0F0F;
|
||
|
|
bits += bits >> 8;
|
||
|
|
bits += bits >> 16;
|
||
|
|
return bits & 0x3F;
|
||
|
|
}
|
||
|
|
|
||
|
|
BitVector::BitVector(BitVectorBuilder& builder, bool select_flag) {
|
||
|
|
if (!builder.size()) {
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
builder.bits_.shrink_to_fit();
|
||
|
|
bits_ = std::move(builder.bits_);
|
||
|
|
|
||
|
|
size_ = builder.size_;
|
||
|
|
rank_tips_.resize(size_ / kBitsInR1 + 1);
|
||
|
|
|
||
|
|
num_1s_ = 0;
|
||
|
|
|
||
|
|
// builds rank_tips_
|
||
|
|
for (uint32_t i = 0; i < rank_tips_.size(); ++i) {
|
||
|
|
auto& tip = rank_tips_[i];
|
||
|
|
tip.first = static_cast<uint32_t>(num_1s_);
|
||
|
|
|
||
|
|
for (uint32_t offset = 0; offset < kR1PerR2; ++offset) {
|
||
|
|
tip.second[offset] = static_cast<uint8_t>(num_1s_ - tip.first);
|
||
|
|
auto pos_in_bits = i * kR1PerR2 + offset;
|
||
|
|
|
||
|
|
if (pos_in_bits < bits_.size()) {
|
||
|
|
num_1s_ += pop_count(bits_[pos_in_bits]);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if (select_flag) {
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
// builds select_tips_
|
||
|
|
select_tips_.push_back(0);
|
||
|
|
auto count = kNum1sPerTip;
|
||
|
|
|
||
|
|
for (uint32_t i = 0; i < rank_tips_.size(); ++i) {
|
||
|
|
if (count < rank_tips_[i].first) {
|
||
|
|
select_tips_.push_back(i - 1);
|
||
|
|
count += kNum1sPerTip;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
select_tips_.push_back(static_cast<uint32_t>(rank_tips_.size() - 1));
|
||
|
|
select_tips_.shrink_to_fit();
|
||
|
|
}
|
||
|
|
|
||
|
|
uint32_t BitVector::rank(uint32_t i) const {
|
||
|
|
auto& hint = rank_tips_[i / kBitsInR1];
|
||
|
|
return hint.first + hint.second[i / kBitsInR2 % kR1PerR2]
|
||
|
|
+ pop_count(bits_[i / 32] & ((1U << (i % 32)) - 1));
|
||
|
|
}
|
||
|
|
|
||
|
|
uint32_t BitVector::select(uint32_t i) const {
|
||
|
|
uint32_t left = 0, right = static_cast<uint32_t>(rank_tips_.size());
|
||
|
|
|
||
|
|
if (!select_tips_.empty()) {
|
||
|
|
auto select_tip_id = i / kNum1sPerTip;
|
||
|
|
left = select_tips_[select_tip_id];
|
||
|
|
right = select_tips_[select_tip_id + 1] + 1;
|
||
|
|
}
|
||
|
|
|
||
|
|
while (left + 1 < right) {
|
||
|
|
const auto center = (left + right) / 2;
|
||
|
|
if (i < rank_tips_[center].first) {
|
||
|
|
right = center;
|
||
|
|
} else {
|
||
|
|
left = center;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
i += 1; // for i+1 th
|
||
|
|
i -= rank_tips_[left].first;
|
||
|
|
|
||
|
|
uint32_t offset = 1;
|
||
|
|
for (; offset < kR1PerR2; ++offset) {
|
||
|
|
if (i <= rank_tips_[left].second[offset]) {
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
i -= rank_tips_[left].second[--offset];
|
||
|
|
|
||
|
|
auto ret = (left * kBitsInR1) + (offset * kBitsInR2);
|
||
|
|
auto bits = bits_[ret / 32];
|
||
|
|
|
||
|
|
{
|
||
|
|
auto _count = pop_count(bits % 65536);
|
||
|
|
if (_count < i) {
|
||
|
|
bits >>= 16;
|
||
|
|
ret += 16;
|
||
|
|
i -= _count;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
{
|
||
|
|
auto _count = pop_count(bits % 256);
|
||
|
|
if (_count < i) {
|
||
|
|
bits >>= 8;
|
||
|
|
ret += 8;
|
||
|
|
i -= _count;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
ret += kSelectTable[i][bits % 256];
|
||
|
|
return ret - 1;
|
||
|
|
}
|
||
|
|
|
||
|
|
size_t BitVector::size_in_bytes() const {
|
||
|
|
size_t ret = 0;
|
||
|
|
ret += util::size_in_bytes(bits_);
|
||
|
|
ret += util::size_in_bytes(rank_tips_);
|
||
|
|
ret += util::size_in_bytes(select_tips_);
|
||
|
|
ret += sizeof(size_);
|
||
|
|
ret += sizeof(num_1s_);
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
void BitVector::write(std::ostream& os) const {
|
||
|
|
util::write_vector(bits_, os);
|
||
|
|
util::write_vector(rank_tips_, os);
|
||
|
|
util::write_vector(select_tips_, os);
|
||
|
|
util::write_value(size_, os);
|
||
|
|
util::write_value(num_1s_, os);
|
||
|
|
}
|
||
|
|
|
||
|
|
void BitVector::read(std::istream& is) {
|
||
|
|
util::read_vector(bits_, is);
|
||
|
|
util::read_vector(rank_tips_, is);
|
||
|
|
util::read_vector(select_tips_, is);
|
||
|
|
util::read_value(size_, is);
|
||
|
|
util::read_value(num_1s_, is);
|
||
|
|
}
|
||
|
|
|
||
|
|
void BitVector::swap(BitVector& rhs) {
|
||
|
|
bits_.swap(rhs.bits_);
|
||
|
|
rank_tips_.swap(rhs.rank_tips_);
|
||
|
|
select_tips_.swap(rhs.select_tips_);
|
||
|
|
std::swap(size_, rhs.size_);
|
||
|
|
std::swap(num_1s_, rhs.num_1s_);
|
||
|
|
}
|
||
|
|
|
||
|
|
} //namespace - xcdat
|