GP_Image_Test/include/extern.h

/*
 *  <Short Description>
 *  Copyright (C) 2024  Brett Terpstra
 *
 *  This program is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */

#ifndef GP_IMAGE_TEST_EXTERN_H
#define GP_IMAGE_TEST_EXTERN_H

#include <blt/std/types.h>
#include <vector>

struct shapiro_wilk_results
{
    blt::i8 error;
    double estimate;
    double p_value;
    double* weights;
    blt::size_t weights_len;
    blt::size_t weights_capacity;
};

extern "C" shapiro_wilk_results willbert(const double* data, blt::size_t len);
extern "C" shapiro_wilk_results willbert_unsorted(double* data, blt::size_t len);
extern "C" shapiro_wilk_results willbert_unsorted_copy(const double* data, blt::size_t len);

extern "C" void test();

class willbruh
{
    private:
        shapiro_wilk_results results;
    public:
        explicit willbruh(const std::vector<double>& data): results(willbert(data.data(), data.size()))
        {}
        
        explicit willbruh(const double* data, blt::size_t size): results(willbert(data, size))
        {}
        
        /**
         * Takes ownership of the results, will free when out of scope.
         */
        explicit willbruh(shapiro_wilk_results results): results(results)
        {}
        
        willbruh(const willbruh& copy) = delete;
        
        willbruh(const willbruh&& move) = delete;
        
        willbruh& operator=(const willbruh& copy) = delete;
        
        willbruh& operator=(const willbruh&& move) = delete;
        
        shapiro_wilk_results& get()
        {
            return results;
        }
        
        shapiro_wilk_results* operator->()
        {
            return &results;
        }
        
        ~willbruh()
        {
            free(results.weights);
        }
};

void shapiro_test_local();
void shapiro_test_unsorted();
void shapiro_test_copy();
void shapiro_test_run();

#endif //GP_IMAGE_TEST_EXTERN_H