SegrulesFSA.cpp
1.15 KB
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
#include <vector>
#include "SegrulesFSA.hpp"
using namespace std;
void SegrulesFSA::proceedToNext(
const unsigned char segnum,
const SegrulesState& state,
bool atEndOfWord,
vector<SegrulesState>& res) const {
const unsigned char* currPtr = ptr + state.offset + 1;
const unsigned char transitionsNum = *currPtr++;
for (int i = 0; i < transitionsNum; i++) {
if (*currPtr == segnum) {
SegrulesState newState = this->transition2State(currPtr);
if ((atEndOfWord && newState.accepting)
|| (!atEndOfWord && !newState.sink)) {
res.push_back(newState);
}
}
currPtr += 4;
}
}
SegrulesState SegrulesFSA::transition2State(const unsigned char* transitionPtr) const {
unsigned char ACCEPTING_FLAG = 1;
unsigned char WEAK_FLAG = 2;
SegrulesState res;
transitionPtr++;
res.shiftOrthFromPrevious = *transitionPtr++;
res.offset = readInt16(transitionPtr);
res.accepting = *(ptr + res.offset) & ACCEPTING_FLAG;
res.weak = *(ptr + res.offset) & WEAK_FLAG;
res.sink = *(ptr + res.offset + 1) == 0;
return res;
}