xref: /libCEED/tests/t205-elemrestriction.c (revision 49aac155e7a09736f56fb3abac0f57dab29f7cbf)
1 /// @file
2 /// Test creation, use, and destruction of an interlaced multi-component element restriction
3 /// \test Test creation, use, and destruction of an interlaced multi-component element restriction
4 #include <ceed.h>
5 #include <ceed/backend.h>
6 #include <stdio.h>
7 
8 int main(int argc, char **argv) {
9   Ceed                ceed;
10   CeedVector          x, y;
11   CeedInt             num_elem = 3;
12   CeedInt             ind[2 * num_elem];
13   CeedInt             layout[3];
14   CeedScalar          x_array[2 * (num_elem + 1)];
15   CeedElemRestriction elem_restriction;
16 
17   CeedInit(argv[1], &ceed);
18 
19   // Setup
20   CeedVectorCreate(ceed, 2 * (num_elem + 1), &x);
21   for (CeedInt i = 0; i < num_elem + 1; i++) {
22     x_array[2 * i]     = 10 + i;
23     x_array[2 * i + 1] = 20 + i;
24   }
25   CeedVectorSetArray(x, CEED_MEM_HOST, CEED_USE_POINTER, x_array);
26   CeedVectorCreate(ceed, 2 * (num_elem * 2), &y);
27 
28   for (CeedInt i = 0; i < num_elem; i++) {
29     ind[2 * i + 0] = 2 * i;
30     ind[2 * i + 1] = 2 * (i + 1);
31   }
32   CeedElemRestrictionCreate(ceed, num_elem, 2, 2, 1, 2 * (num_elem + 1), CEED_MEM_HOST, CEED_USE_POINTER, ind, &elem_restriction);
33 
34   // Restrict
35   CeedElemRestrictionApply(elem_restriction, CEED_NOTRANSPOSE, x, y, CEED_REQUEST_IMMEDIATE);
36 
37   // Check
38   {
39     const CeedScalar *y_array;
40 
41     CeedVectorGetArrayRead(y, CEED_MEM_HOST, &y_array);
42     CeedElemRestrictionGetELayout(elem_restriction, &layout);
43     for (CeedInt i = 0; i < 2; i++) {             // Node
44       for (CeedInt j = 0; j < 2; j++) {           // Component
45         for (CeedInt k = 0; k < num_elem; k++) {  // Element
46           if (y_array[i * layout[0] + j * layout[1] + k * layout[2]] != x_array[ind[i + k * 2] + j]) {
47             // LCOV_EXCL_START
48             printf("Error in restricted array y[%" CeedInt_FMT "][%" CeedInt_FMT "][%" CeedInt_FMT "] = %f != %f\n", i, j, k,
49                    (CeedScalar)y_array[i * layout[0] + j * layout[1] + k * layout[2]], x_array[ind[i + k * 2] + j * (num_elem + 1)]);
50             // LCOV_EXCL_STOP
51           }
52         }
53       }
54     }
55     CeedVectorRestoreArrayRead(y, &y_array);
56   }
57 
58   CeedVectorDestroy(&x);
59   CeedVectorDestroy(&y);
60   CeedElemRestrictionDestroy(&elem_restriction);
61   CeedDestroy(&ceed);
62   return 0;
63 }
64