xref: /libCEED/tests/t204-elemrestriction.c (revision 73d2608534f156b5cd04d2be8b81b970eca98867)
1 /// @file
2 /// Test creation, use, and destruction of a multicomponent element restriction
3 /// \test Test creation, 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 = 3;
10   CeedInt ind[2*ne];
11   CeedScalar a[2*(ne+1)];
12   const CeedScalar *yy;
13   CeedElemRestriction r;
14 
15   CeedInit(argv[1], &ceed);
16 
17   // Setup
18   CeedVectorCreate(ceed, 2*(ne+1), &x);
19   for (CeedInt i=0; i<ne+1; i++) {
20     a[i] = 10 + i;
21     a[i+ne+1] = 20 + i;
22   }
23   CeedVectorSetArray(x, CEED_MEM_HOST, CEED_USE_POINTER, a);
24 
25   for (CeedInt i=0; i<ne; i++) {
26     ind[2*i+0] = i;
27     ind[2*i+1] = i+1;
28   }
29   CeedElemRestrictionCreate(ceed, ne, 2, ne+1, 2, CEED_MEM_HOST, CEED_USE_POINTER,
30                             ind, &r);
31   CeedVectorCreate(ceed, 2*(ne*2), &y);
32   CeedVectorSetValue(y, 0); // Allocates array
33 
34   // Restrict
35   CeedElemRestrictionApply(r, CEED_NOTRANSPOSE, CEED_NOTRANSPOSE, x, y,
36                            CEED_REQUEST_IMMEDIATE);
37 
38   // Check
39   CeedVectorGetArrayRead(y, CEED_MEM_HOST, &yy);
40   for (CeedInt i=0; i<ne; i++) {
41     for (CeedInt n=0; n<2; n++) {
42         if (yy[i*4+n] != 10+(2*i+n+1)/2)
43            printf("Error in restricted array y[%d] = %f != %f\n",
44                            i*4+n, (double)yy[i*4+n], 10.+(2*i+n+1)/2);
45         if (yy[i*4+n+2] != 20+(2*i+n+1)/2)
46           printf("Error in restricted array y[%d] = %f != %f\n",
47                            i*4+n+2, (double)yy[i*4+n+2], 20.+(2*i+n+1)/2);
48     }
49   }
50 
51   CeedVectorRestoreArrayRead(y, &yy);
52   CeedVectorDestroy(&x);
53   CeedVectorDestroy(&y);
54   CeedElemRestrictionDestroy(&r);
55   CeedDestroy(&ceed);
56   return 0;
57 }
58