IndexType* load_saved_index(const Matrix<ElementType>& dataset, const std::string& filename, Distance distance)
{
FILE* fin = fopen(filename.c_str(), "rb");
if (fin == NULL) {
return NULL;
}
IndexHeader header = load_header(fin);
if (header.data_type != flann_datatype_value<ElementType>::value) {
throw FLANNException("Datatype of saved index is different than of the one to be created.");
}
IndexParams params;
params["algorithm"] = header.index_type;
IndexType* nnIndex = create_index_by_type<Distance>(header.index_type, dataset, params, distance);
rewind(fin);
nnIndex->loadIndex(fin);
fclose(fin);
return nnIndex;
}
