library/cpp/containers/comptrie/comptrie_impl.cpp


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39

#include "comptrie_impl.h"

#include <util/system/rusage.h>
#include <util/stream/output.h>

// Unpack the leaf value. The algorithm can store up to 8 full bytes in leafs.

namespace NCompactTrie {
    size_t MeasureOffset(size_t offset) { 
        int n = 0; 

        while (offset) { 
            offset >>= 8; 
            ++n; 
        } 
 
        return n; 
    }
 
    size_t PackOffset(char* buffer, size_t offset) { 
        size_t len = MeasureOffset(offset); 
        size_t i = len; 

        while (i--) { 
            buffer[i] = (char)(offset & 0xFF); 
            offset >>= 8; 
        } 
 
        return len; 
    }
 
    void ShowProgress(size_t n) { 
        if (n % 1000000 == 0) 
            Cerr << n << ", RSS=" << (TRusage::Get().MaxRss >> 20) << "mb" << Endl;
        else if (n % 20000 == 0) 
            Cerr << "."; 
    } 

}