xref: /libCEED/tests/t200-elemrestriction.c (revision 3b0d37b7b48e6b9e226afa94eeb793b3e14bfbcc)
1 /// @file
2 /// Test creation, use, and destruction of an element restriction
3 /// \test Test creation, use, and destruction of an element restriction
4 #include <ceed.h>
5 
6 int main(int argc, char **argv) {
7   Ceed ceed;
8   CeedVector x, y;
9   CeedInt num_elem = 3;
10   CeedInt ind[2*num_elem];
11   CeedScalar a[num_elem+1];
12   const CeedScalar *yy;
13   CeedElemRestriction r;
14 
15   CeedInit(argv[1], &ceed);
16 
17   CeedVectorCreate(ceed, num_elem+1, &x);
18   for (CeedInt i=0; i<num_elem+1; i++)
19     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   }
26   CeedElemRestrictionCreate(ceed, num_elem, 2, 1, 1, num_elem+1, CEED_MEM_HOST,
27                             CEED_USE_POINTER, ind, &r);
28   CeedVectorCreate(ceed, num_elem*2, &y);
29   CeedElemRestrictionApply(r, CEED_NOTRANSPOSE, x, y, CEED_REQUEST_IMMEDIATE);
30 
31   CeedVectorGetArrayRead(y, CEED_MEM_HOST, &yy);
32   for (CeedInt i=0; i<num_elem*2; i++)
33     if (10+(i+1)/2 != yy[i])
34       // LCOV_EXCL_START
35       printf("Error in restricted array y[%" CeedInt_FMT "] = %f\n",
36              i, (CeedScalar)yy[i]);
37   // LCOV_EXCL_STOP
38   CeedVectorRestoreArrayRead(y, &yy);
39 
40   CeedVectorDestroy(&x);
41   CeedVectorDestroy(&y);
42   CeedElemRestrictionDestroy(&r);
43   CeedDestroy(&ceed);
44   return 0;
45 }
46