37 lines
954 B
C++
37 lines
954 B
C++
|
|
|
|
#include "freq_analyser.hh"
|
|
|
|
#define DEBUG 0
|
|
|
|
namespace LibCryptAffinity {
|
|
std::list<TextCounter> FreqAnalyser::getPriorities(Text text, int keylen, int column){
|
|
std::list<TextCounter> result;
|
|
std::map<Text, int> counter;
|
|
std::map<Text, int>::iterator countIt;
|
|
int i;
|
|
for (i=0; i<text.size(); i += keylen) {
|
|
Text letter;
|
|
letter.push_back(text[i+column]);
|
|
if (counter.find(letter) == counter.end()){
|
|
counter[letter] = 1;
|
|
} else {
|
|
counter[letter] = counter[letter] + 1;
|
|
}
|
|
}
|
|
// on relit le map et on crée la liste...
|
|
pDEBUG("FreqAnaliser","Column %d\n", column);
|
|
for (countIt = counter.begin(); countIt != counter.end(); countIt++){
|
|
TextCounter tc;
|
|
|
|
tc.setText(countIt->first);
|
|
tc.setCount(countIt->second);
|
|
pDEBUG("FreqAnalyser"," Letter %s found %d times\n",tc.getText().toString().c_str(), tc.getCount());
|
|
result.push_back(tc);
|
|
}
|
|
result.sort();
|
|
result.reverse();
|
|
return result;
|
|
}
|
|
}
|