xref: /libCEED/tests/t232-elemrestriction.c (revision 13d7dc18f45030012a8adfaa76169113ba58c950)
1 /// @file
2 /// Test creation, use, and destruction of an element restriction at points for single elements
3 /// \test Test creation, use, and destruction of an element restriction at points for single elements
4 #include <ceed.h>
5 #include <stdio.h>
6 
7 int main(int argc, char **argv) {
8   Ceed                ceed;
9   CeedInt             num_elem = 3, num_points = num_elem * 2;
10   CeedInt             ind[(num_elem + 1) + num_points];
11   CeedVector          x, y;
12   CeedElemRestriction elem_restriction;
13 
14   CeedInit(argv[1], &ceed);
15 
16   CeedVectorCreate(ceed, num_points, &x);
17   {
18     CeedInt    point_index = num_elem;
19     CeedScalar array[num_points];
20 
21     for (CeedInt i = 0; i < num_elem; i++) {
22       CeedInt num_points_in_elem = (i + 1) % num_elem + 1;
23 
24       for (CeedInt j = 0; j < num_points_in_elem; j++) {
25         array[point_index] = i;
26         point_index        = (point_index + 1) % num_points;
27       }
28     }
29     CeedVectorSetArray(x, CEED_MEM_HOST, CEED_COPY_VALUES, array);
30   }
31 
32   {
33     CeedInt offset      = num_elem + 1;
34     CeedInt point_index = num_elem;
35 
36     for (CeedInt i = 0; i < num_elem; i++) {
37       CeedInt num_points_in_elem = (i + 1) % num_elem + 1;
38 
39       ind[i] = offset;
40       for (CeedInt j = 0; j < num_points_in_elem; j++) {
41         ind[offset + j] = point_index;
42         point_index     = (point_index + 1) % num_points;
43       }
44       offset += num_points_in_elem;
45     }
46     ind[num_elem] = offset;
47   }
48   CeedElemRestrictionCreateAtPoints(ceed, num_elem, num_points, 1, num_points, CEED_MEM_HOST, CEED_USE_POINTER, ind, &elem_restriction);
49 
50   {
51     CeedInt max_points;
52 
53     CeedElemRestrictionGetMaxPointsInElement(elem_restriction, &max_points);
54     CeedVectorCreate(ceed, max_points, &y);
55   }
56 
57   {
58     for (CeedInt i = 0; i < num_elem; i++) {
59       CeedInt           num_points_in_elem = (i + 1) % num_elem + 1;
60       const CeedScalar *read_array;
61 
62       CeedElemRestrictionApplyAtPointsInElement(elem_restriction, i, CEED_NOTRANSPOSE, x, y, CEED_REQUEST_IMMEDIATE);
63       CeedVectorGetArrayRead(y, CEED_MEM_HOST, &read_array);
64 
65       for (CeedInt j = 0; j < num_points_in_elem; j++) {
66         if (i != read_array[j]) {
67           // LCOV_EXCL_START
68           printf("Error in restricted element array %" CeedInt_FMT " y[%" CeedInt_FMT "] = %f\n", i, j, (CeedScalar)read_array[j]);
69           // LCOV_EXCL_STOP
70         }
71       }
72       CeedVectorRestoreArrayRead(y, &read_array);
73     }
74   }
75 
76   CeedVectorDestroy(&x);
77   CeedVectorDestroy(&y);
78   CeedElemRestrictionDestroy(&elem_restriction);
79   CeedDestroy(&ceed);
80   return 0;
81 }
82