MetadataParser/utils.h at master · team-phoenix/MetadataParser · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
#ifndef UTILS
#define UTILS

#include <cstdio>
using namespace std;

template <class T> unsigned int edit_distance(const T& s1, const T& s2)
{
    const size_t len1 = s1.size(), len2 = s2.size();
    vector<vector<unsigned int> > d(len1 + 1, vector<unsigned int>(len2 + 1));

    d[0][0] = 0;
    for(unsigned int i = 1; i <= len1; ++i) d[i][0] = i;
    for(unsigned int i = 1; i <= len2; ++i) d[0][i] = i;

    for(unsigned int i = 1; i <= len1; ++i)
        for(unsigned int j = 1; j <= len2; ++j)

                      d[i][j] = std::min( std::min(d[i - 1][j] + 1,d[i][j - 1] + 1),
                                          d[i - 1][j - 1] + (s1[i - 1] == s2[j - 1] ? 0 : 1) );
    return d[len1][len2];
}

#endif // UTILS