63 lines
2.6 KiB
C++
63 lines
2.6 KiB
C++
#include "concordia/index_searcher.hpp"
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#include "concordia/common/utils.hpp"
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#include <boost/filesystem.hpp>
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IndexSearcher::IndexSearcher() {
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_anubisSearcher = boost::shared_ptr<AnubisSearcher>(
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new AnubisSearcher());
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}
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IndexSearcher::~IndexSearcher() {
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}
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boost::ptr_vector<SubstringOccurence> IndexSearcher::simpleSearch(
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boost::shared_ptr<HashGenerator> hashGenerator,
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boost::shared_ptr<std::vector<sauchar_t> > T,
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boost::shared_ptr<std::vector<SUFFIX_MARKER_TYPE> > markers,
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boost::shared_ptr<std::vector<saidx_t> > SA,
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const string & pattern) throw(ConcordiaException) {
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boost::ptr_vector<SubstringOccurence> result;
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int left;
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boost::shared_ptr<vector<INDEX_CHARACTER_TYPE> > hash =
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hashGenerator->generateHash(pattern);
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saidx_t patternLength = hash->size()*sizeof(INDEX_CHARACTER_TYPE);
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sauchar_t * patternArray = Utils::indexVectorToSaucharArray(hash);
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int size = sa_search(T->data(), (saidx_t) T->size(),
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(const sauchar_t *) patternArray, patternLength,
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SA->data(), (saidx_t) SA->size(), &left);
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for (int i = 0; i < size; ++i) {
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saidx_t resultPos = SA->at(left + i);
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if (resultPos % sizeof(INDEX_CHARACTER_TYPE) == 0) {
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// As we are looking for a pattern in an array of higher
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// resolution than the hashed index file, we might
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// obtain accidental results exceeding the boundaries
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// of characters in hashed index. The above check
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// removes these accidental results.
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saidx_t actualResultPos = resultPos / sizeof(INDEX_CHARACTER_TYPE);
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SUFFIX_MARKER_TYPE marker = markers->at(actualResultPos);
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result.push_back(new SubstringOccurence(
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Utils::getIdFromMarker(marker),
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Utils::getOffsetFromMarker(marker)));
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}
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}
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delete[] patternArray;
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return result;
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}
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boost::ptr_vector<AnubisSearchResult> IndexSearcher::anubisSearch(
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boost::shared_ptr<HashGenerator> hashGenerator,
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boost::shared_ptr<std::vector<sauchar_t> > T,
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boost::shared_ptr<std::vector<SUFFIX_MARKER_TYPE> > markers,
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boost::shared_ptr<std::vector<saidx_t> > SA,
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const string & pattern) throw(ConcordiaException) {
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boost::shared_ptr<vector<INDEX_CHARACTER_TYPE> > hash =
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hashGenerator->generateHash(pattern);
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return _anubisSearcher->anubisSearch(T, markers, SA, hash);
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}
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