    // Copyright (C) 2009  Davis E. King (davis@dlib.net)
    // License: Boost Software License   See LICENSE.txt for the full license.

    #include "../tester.h"
    #include <dlib/matrix.h>

    #ifndef DLIB_USE_BLAS
    #error "BLAS bindings must be used for this test to make any sense"
    #endif

    namespace dlib
    {
        namespace blas_bindings
        {
            // This is a little screwy.  This function is used inside the BLAS
            // bindings to count how many times each of the BLAS functions get called.
    #ifdef DLIB_TEST_BLAS_BINDINGS
            int& counter_gemv() { static int counter = 0; return counter; }
    #endif

        }
    }

    namespace
    {
        using namespace test;
        using namespace std;
        // Declare the logger we will use in this test.  The name of the logger
        // should start with "test."
        dlib::logger dlog("test.gemv");

        class blas_bindings_gemv_tester : public tester
        {
        public:
            blas_bindings_gemv_tester (
            ) :
                tester (
                    "test_gemv", // the command line argument name for this test
                    "Run tests for GEMV routines.", // the command line argument description
                    0                     // the number of command line arguments for this test
                )
            {}

            template <typename matrix_type, typename rv_type, typename cv_type>
            void test_gemv_stuff(
                matrix_type& m,
                cv_type& cv,
                rv_type& rv
            ) const
            {
                using namespace dlib;
                using namespace dlib::blas_bindings;

                cv_type cv2;
                rv_type rv2;
                typedef typename matrix_type::type scalar_type;
                scalar_type val;

                counter_gemv() = 0;
                cv2 = m*cv;
                DLIB_TEST(counter_gemv() == 1);

                counter_gemv() = 0;
                cv2 = m*2*cv;
                DLIB_TEST(counter_gemv() == 1);

                counter_gemv() = 0;
                cv2 = m*2*trans(rv);
                DLIB_TEST(counter_gemv() == 1);

                counter_gemv() = 0;
                rv2 = trans(m*2*cv);
                DLIB_TEST(counter_gemv() == 1);

                counter_gemv() = 0;
                rv2 = rv*m;
                DLIB_TEST(counter_gemv() == 1);

                counter_gemv() = 0;
                rv2 = (rv + rv)*m;
                DLIB_TEST(counter_gemv() == 1);

                counter_gemv() = 0;
                rv2 = trans(cv)*m;
                DLIB_TEST(counter_gemv() == 1);
                dlog << dlib::LTRACE << 1;

                counter_gemv() = 0;
                rv2 = trans(cv)*trans(m) + rv*trans(m);
                DLIB_TEST(counter_gemv() == 2);
                dlog << dlib::LTRACE << 2;

                counter_gemv() = 0;
                cv2 = m*trans(trans(cv)*trans(m) + 3*rv*trans(m));
                DLIB_TEST(counter_gemv() == 3);

                // This does one dot and one gemv
                counter_gemv() = 0;
                val = trans(cv)*m*trans(rv);
                DLIB_TEST_MSG(counter_gemv() == 1, counter_gemv());

                // This does one dot and two gemv
                counter_gemv() = 0;
                val = (trans(cv)*m)*(m*trans(rv));
                DLIB_TEST_MSG(counter_gemv() == 2, counter_gemv());

                // This does one dot and two gemv
                counter_gemv() = 0;
                val = trans(cv)*m*trans(m)*trans(rv);
                DLIB_TEST_MSG(counter_gemv() == 2, counter_gemv());
            }

            template <typename matrix_type, typename rv_type, typename cv_type>
            void test_gemv_stuff_conj(
                matrix_type& m,
                cv_type& cv,
                rv_type& rv
            ) const
            {
                using namespace dlib;
                using namespace dlib::blas_bindings;

                cv_type cv2;
                rv_type rv2;

                counter_gemv() = 0;
                cv2 = trans(cv)*conj(m);
                DLIB_TEST(counter_gemv() == 1);

                counter_gemv() = 0;
                cv2 = conj(trans(m))*rv;
                DLIB_TEST(counter_gemv() == 1);

                counter_gemv() = 0;
                cv2 = conj(trans(m))*trans(cv);
                DLIB_TEST(counter_gemv() == 1);

                counter_gemv() = 0;
                cv2 = trans(trans(cv)*conj(2*m) + conj(3*trans(m))*rv + conj(trans(m)*3)*trans(cv));
                DLIB_TEST(counter_gemv() == 3);

            }

            void perform_test (
            )
            {
                using namespace dlib;
                typedef dlib::memory_manager<char>::kernel_1a mm;

                dlog << dlib::LINFO << "test double";
                {
                    matrix<double> m = randm(4,4);
                    matrix<double,0,1> cv = randm(4,1);
                    matrix<double,1,0> rv = randm(1,4);
                    test_gemv_stuff(m,cv,rv);
                }

                dlog << dlib::LINFO << "test float";
                {
                    matrix<float> m = matrix_cast<float>(randm(4,4));
                    matrix<float,0,1> cv = matrix_cast<float>(randm(4,1));
                    matrix<float,1,0> rv = matrix_cast<float>(randm(1,4));
                    test_gemv_stuff(m,cv,rv);
                }

                dlog << dlib::LINFO << "test complex<double>";
                {
                    matrix<complex<double> > m = complex_matrix(randm(4,4), randm(4,4));
                    matrix<complex<double>,0,1> cv = complex_matrix(randm(4,1), randm(4,1));
                    matrix<complex<double>,1,0> rv = complex_matrix(randm(1,4), randm(1,4));
                    test_gemv_stuff(m,cv,rv);
                }

                dlog << dlib::LINFO << "test complex<float>";
                {
                    matrix<complex<float> > m = matrix_cast<complex<float> >(complex_matrix(randm(4,4), randm(4,4)));
                    matrix<complex<float>,0,1> cv = matrix_cast<complex<float> >(complex_matrix(randm(4,1), randm(4,1)));
                    matrix<complex<float>,1,0> rv = matrix_cast<complex<float> >(complex_matrix(randm(1,4), randm(1,4)));
                    test_gemv_stuff(m,cv,rv);
                }

                dlog << dlib::LINFO << "test double";
                {
                    matrix<double,0,0,mm,column_major_layout> m = randm(4,4);
                    matrix<double,0,1,mm,column_major_layout> cv = randm(4,1);
                    matrix<double,1,0,mm,column_major_layout> rv = randm(1,4);
                    test_gemv_stuff(m,cv,rv);
                }

                dlog << dlib::LINFO << "test float";
                {
                    matrix<float,0,0,mm,column_major_layout> m = matrix_cast<float>(randm(4,4));
                    matrix<float,0,1,mm,column_major_layout> cv = matrix_cast<float>(randm(4,1));
                    matrix<float,1,0,mm,column_major_layout> rv = matrix_cast<float>(randm(1,4));
                    test_gemv_stuff(m,cv,rv);
                }

                dlog << dlib::LINFO << "test complex<double>";
                {
                    matrix<complex<double>,0,0,mm,column_major_layout > m = complex_matrix(randm(4,4), randm(4,4));
                    matrix<complex<double>,0,1,mm,column_major_layout> cv = complex_matrix(randm(4,1), randm(4,1));
                    matrix<complex<double>,1,0,mm,column_major_layout> rv = complex_matrix(randm(1,4), randm(1,4));
                    test_gemv_stuff(m,cv,rv);
                }

                dlog << dlib::LINFO << "test complex<float>";
                {
                    matrix<complex<float>,0,0,mm,column_major_layout > m = matrix_cast<complex<float> >(complex_matrix(randm(4,4), randm(4,4)));
                    matrix<complex<float>,0,1,mm,column_major_layout> cv = matrix_cast<complex<float> >(complex_matrix(randm(4,1), randm(4,1)));
                    matrix<complex<float>,1,0,mm,column_major_layout> rv = matrix_cast<complex<float> >(complex_matrix(randm(1,4), randm(1,4)));
                    test_gemv_stuff(m,cv,rv);
                }

                print_spinner();
            }
        };

        blas_bindings_gemv_tester a;

    }