95 lines
3.1 KiB
C++
95 lines
3.1 KiB
C++
#include "concordia/concordia_index.hpp"
|
|
|
|
#include <boost/filesystem.hpp>
|
|
#include <iostream>
|
|
|
|
ConcordiaIndex::ConcordiaIndex(const string & wordMapFilePath,
|
|
const string & hashedIndexFilePath,
|
|
const string & suffixArrayFilePath)
|
|
throw(ConcordiaException) :
|
|
_hashedIndexFilePath(hashedIndexFilePath),
|
|
_suffixArrayFilePath(suffixArrayFilePath) {
|
|
if (boost::filesystem::exists(wordMapFilePath)) {
|
|
if (!boost::filesystem::exists(hashedIndexFilePath)) {
|
|
throw ConcordiaException("E01: Word map file exists "
|
|
"but hashed index file absent.");
|
|
}
|
|
} else { // WordMap file does not exist
|
|
if (boost::filesystem::exists(hashedIndexFilePath)) {
|
|
throw ConcordiaException("E02: Hashed index file exists "
|
|
"but word map file absent.");
|
|
}
|
|
}
|
|
_hashGenerator = boost::shared_ptr<HashGenerator>(
|
|
new HashGenerator(wordMapFilePath));
|
|
}
|
|
|
|
ConcordiaIndex::~ConcordiaIndex() {
|
|
}
|
|
|
|
void ConcordiaIndex::serializeWordMap() {
|
|
_hashGenerator->serializeWordMap();
|
|
}
|
|
|
|
void ConcordiaIndex::generateSuffixArray() {
|
|
ifstream hashedIndexFile;
|
|
hashedIndexFile.open(_hashedIndexFilePath.c_str(), ios::in|
|
|
ios::ate|ios::binary);
|
|
|
|
/* Get the file size. */
|
|
long n = hashedIndexFile.tellg();
|
|
|
|
sauchar_t *T;
|
|
saidx_t *SA;
|
|
|
|
T = new sauchar_t[n];
|
|
SA = new saidx_t[n];
|
|
|
|
/* Read n bytes of data. */
|
|
hashedIndexFile.seekg(0, ios::beg);
|
|
|
|
sauchar_t buff;
|
|
int pos = 0;
|
|
while (!hashedIndexFile.eof()) {
|
|
hashedIndexFile.read(reinterpret_cast<char *>(&buff),
|
|
sizeof(sauchar_t));
|
|
T[pos++] = buff;
|
|
}
|
|
hashedIndexFile.close();
|
|
|
|
/* Construct the suffix array. */
|
|
if (divsufsort(T, SA, (saidx_t)n) != 0) {
|
|
throw ConcordiaException("Error creating suffix array.");
|
|
}
|
|
|
|
/* Write the suffix array. */
|
|
|
|
ofstream suffixArrayFile;
|
|
suffixArrayFile.open(_suffixArrayFilePath.c_str(), ios::out|ios::binary);
|
|
|
|
for (int i = 0; i < n; i++) {
|
|
suffixArrayFile.write(reinterpret_cast<char *>(&SA[i]),
|
|
sizeof(saidx_t));
|
|
}
|
|
suffixArrayFile.close();
|
|
|
|
/* Deallocate memory. */
|
|
delete[] T;
|
|
delete[] SA;
|
|
}
|
|
|
|
void ConcordiaIndex::addSentence(const string & sentence) {
|
|
vector<sauchar_t> hash = _hashGenerator->generateHash(sentence);
|
|
ofstream hashedIndexFile;
|
|
hashedIndexFile.open(_hashedIndexFilePath.c_str(), ios::out|
|
|
ios::app|ios::binary);
|
|
for (vector<sauchar_t>::iterator it = hash.begin();
|
|
it != hash.end(); ++it) {
|
|
sauchar_t buff = *it;
|
|
hashedIndexFile.write(reinterpret_cast<char *>(&buff),
|
|
sizeof(sauchar_t));
|
|
}
|
|
hashedIndexFile.close();
|
|
}
|
|
|