xref: /libCEED/tests/t206-elemrestriction.c (revision 014ec18d8ea934e4fc0f69a8c06ffce36a53ff2a)
1 /// @file
2 /// Test creation, transpose use, and destruction of a multicomponent element restriction
3 /// \test Test creation, transpose use, and destruction of a multicomponent element restriction
4 #include <ceed.h>
5 
6 int main(int argc, char **argv) {
7   Ceed ceed;
8   CeedVector x, y;
9   CeedInt ne = 5, mult;
10   CeedInt ind[2*ne];
11   CeedScalar a[2*(ne*2)];
12   const CeedScalar *yy;
13   CeedElemRestriction r;
14 
15   CeedInit(argv[1], &ceed);
16 
17   // Setup
18   CeedVectorCreate(ceed, 2*(ne*2), &x);
19   for (CeedInt i=0; i<ne; i++)
20     for (CeedInt n=0; n<2; n++) {
21       a[i*4+n] = 10+(2*i+n+1)/2;
22       a[i*4+n+2] = 20+(2*i+n+1)/2;
23     }
24   CeedVectorSetArray(x, CEED_MEM_HOST, CEED_USE_POINTER, a);
25 
26   for (CeedInt i=0; i<ne; i++) {
27     ind[2*i+0] = i;
28     ind[2*i+1] = i+1;
29   }
30   CeedElemRestrictionCreate(ceed, ne, 2, 2, ne+1, 2*(ne+1), CEED_MEM_HOST,
31                             CEED_USE_POINTER, ind, &r);
32   CeedVectorCreate(ceed, 2*(ne+1), &y);
33   CeedVectorSetValue(y, 0); // Allocates array
34 
35   // Restrict
36   CeedElemRestrictionApply(r, CEED_TRANSPOSE, x, y, CEED_REQUEST_IMMEDIATE);
37 
38   // Check
39   CeedVectorGetArrayRead(y, CEED_MEM_HOST, &yy);
40   for (CeedInt i=0; i<ne+1; i++) {
41     mult = i>0&&i<ne ? 2 : 1;
42     if (yy[i] != (10+i)*mult)
43       // LCOV_EXCL_START
44       printf("Error in restricted array y[%d] = %f != %f\n",
45              i, (double)yy[i], (10.+i)*mult);
46     // LCOV_EXCL_STOP
47     if (yy[i+ne+1] != (20+i)*mult)
48       // LCOV_EXCL_START
49       printf("Error in restricted array y[%d] = %f != %f\n",
50              i+ne+1, (double)yy[i+ne+1], (20.+i)*mult);
51     // LCOV_EXCL_STOP
52   }
53 
54   CeedVectorRestoreArrayRead(y, &yy);
55   CeedVectorDestroy(&x);
56   CeedVectorDestroy(&y);
57   CeedElemRestrictionDestroy(&r);
58   CeedDestroy(&ceed);
59   return 0;
60 }
61