FastText flattened C-style API examples (DLL)

fasttext_api.cpp

FASTTEXT_API BOOL FASTTEXT_CC fasttext_new(FastText** ft)
{
    return ExceptionBoundary([&]() -> BOOL
    {
        *ft = new FastText();
        return true;
    });
}

FASTTEXT_API BOOL FASTTEXT_CC fasttext_release(FastText* ft)
{
    return ExceptionBoundary([&]() -> BOOL
    {
        CHECK_HANDLE(ft);
        ft->~FastText();
        return true;
    });
}

typedef BOOL(FASTTEXT_CC *fasttext_nn_callback)(char* word, real score, void* data);

FASTTEXT_API BOOL FASTTEXT_CC fasttext_nn2(FastText* ft, Matrix* mx, char** positive, char** negative, int count, fasttext_nn_callback callback, void* data)
{
    return ExceptionBoundary([&]() -> BOOL
    {
        CHECK_HANDLE(ft);
        CHECK_HANDLE(mx);
        std::set<std::string> banSet;
        std::vector<std::pair<real, std::string>> results;
        Vector buffer(ft->getDimension()), query(ft->getDimension());
        std::string word_;

        while (true)
        {
            if (!*positive || **positive == '\0')
                break;

            word_ = std::string(*positive++);
            banSet.insert(word_);
            ft->getWordVector(buffer, word_);
            query.addVector(buffer, 1.0);
        }

        while (true)
        {
            if (!*negative || **negative == '\0')
                break;

            word_ = std::string(*negative++);
            banSet.insert(word_);
            ft->getWordVector(buffer, word_);
            query.addVector(buffer, -1.0);
        }

        ft->findNN(*mx, query, count, banSet, results);
        for (auto& pair : results) {
            int b = callback((char*)pair.second.c_str(), pair.first, data);
            if (b != 0) break;
        }
        return true;
    });
}