Draft: add test for util_stride

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test/fortran/test_util_stride.f90

+! ICON
+!
+! ---------------------------------------------------------------
+! Copyright (C) 2004-2024, DWD, MPI-M, DKRZ, KIT, ETH, MeteoSwiss
+! Contact information: icon-model.org
+!
+! See AUTHORS.TXT for a list of authors
+! See LICENSES/ for license information
+! SPDX-License-Identifier: BSD-3-Clause
+! ---------------------------------------------------------------
+
+MODULE test_mo_util_stride
+  USE FORTUTF
+  USE ISO_C_BINDING, ONLY: c_int, c_ptr, c_loc, c_size_t
+  USE mo_util_stride
+CONTAINS
+  SUBROUTINE TEST_util_stride_1d
+    INTEGER(c_int) :: f_out, elemsize
+    REAL, DIMENSION(10), TARGET :: array
+    TYPE(c_ptr) :: p1, p2
+
+    CALL TAG_TEST("util_stride_1d")
+    array = [1.0, 2.0, 3.0, 4.0, 5.0, 6.0, 7.0, 8.0, 9.0, 10.0]
+    elemsize = SIZEOF(array(1))
+    p1 = C_LOC(array(1))
+    p2 = C_LOC(array(2))
+
+    CALL util_stride_1d(f_out, elemsize, p1, p2)
+
+    CALL ASSERT_EQUAL(f_out, 1)
+  END SUBROUTINE TEST_util_stride_1d
+
+  SUBROUTINE TEST_util_stride_2d
+    INTEGER(c_int) :: f_out(2), elemsize
+    REAL, DIMENSION(10, 10), TARGET :: array
+    TYPE(c_ptr) :: p1, p2, p3
+
+    CALL TAG_TEST("util_stride_2d")
+    array = RESHAPE([(i, i=1, 100)], [10, 10])
+    elemsize = SIZEOF(array(1, 1))
+    p1 = C_LOC(array(1, 1))
+    p2 = C_LOC(array(2, 1))
+    p3 = C_LOC(array(1, 2))
+
+    CALL util_stride_2d(f_out, elemsize, p1, p2, p3)
+
+    CALL ASSERT_EQUAL(f_out(1), 1)
+    CALL ASSERT_EQUAL(f_out(2), 10)
+  END SUBROUTINE TEST_util_stride_2d
+END MODULE test_mo_util_stride