xref: /libCEED/tests/t220-elemrestriction.c (revision 2b730f8b5a9c809740a0b3b302db43a719c636b1)
1 /// @file
2 /// Test creation, use, and destruction of an element restriction oriented
3 /// \test Test creation, use, and destruction of an element restriction oriented
4 #include <ceed.h>
5 
6 int main(int argc, char **argv) {
7   Ceed                ceed;
8   CeedVector          x, y;
9   CeedInt             num_elem = 6, P = 2, dim = 1;
10   CeedInt             ind[P * num_elem];
11   bool                orient[P * num_elem];
12   CeedScalar          a[num_elem + 1];
13   const CeedScalar   *yy;
14   CeedElemRestriction r;
15 
16   CeedInit(argv[1], &ceed);
17 
18   CeedVectorCreate(ceed, num_elem + 1, &x);
19   for (CeedInt i = 0; i < num_elem + 1; i++) a[i] = 10 + i;
20   CeedVectorSetArray(x, CEED_MEM_HOST, CEED_USE_POINTER, a);
21 
22   for (CeedInt i = 0; i < num_elem; i++) {
23     ind[2 * i + 0] = i;
24     ind[2 * i + 1] = i + 1;
25     // flip the dofs on element 1,3,...
26     orient[2 * i + 0] = (i % (2)) * -1 < 0;
27     orient[2 * i + 1] = (i % (2)) * -1 < 0;
28   }
29   CeedElemRestrictionCreateOriented(ceed, num_elem, P, dim, 1, num_elem + 1, CEED_MEM_HOST, CEED_USE_POINTER, ind, orient, &r);
30   CeedVectorCreate(ceed, num_elem * 2, &y);
31   CeedElemRestrictionApply(r, CEED_NOTRANSPOSE, x, y, CEED_REQUEST_IMMEDIATE);
32 
33   CeedVectorGetArrayRead(y, CEED_MEM_HOST, &yy);
34   for (CeedInt i = 0; i < num_elem; i++) {
35     for (CeedInt j = 0; j < P; j++) {
36       CeedInt k = j + P * i;
37       if (10 + (k + 1) / 2 != yy[k] * CeedIntPow(-1, i % 2)) {
38         // LCOV_EXCL_START
39         printf("Error in restricted array y[%" CeedInt_FMT "] = %f\n", k, (CeedScalar)yy[k]);
40         // LCOV_EXCL_STOP
41       }
42     }
43   }
44   CeedVectorRestoreArrayRead(y, &yy);
45 
46   CeedVectorDestroy(&x);
47   CeedVectorDestroy(&y);
48   CeedElemRestrictionDestroy(&r);
49   CeedDestroy(&ceed);
50   return 0;
51 }
52