xref: /libCEED/tests/t200-elemrestriction.c (revision d1d35e2f02dc969aee8debf3fd943dd784aa847a)
14411cf47Sjeremylt /// @file
273d26085Sjeremylt /// Test creation, use, and destruction of an element restriction
373d26085Sjeremylt /// \test Test creation, use, and destruction of an element restriction
457c64913Sjeremylt #include <ceed.h>
557c64913Sjeremylt 
657c64913Sjeremylt int main(int argc, char **argv) {
757c64913Sjeremylt   Ceed ceed;
857c64913Sjeremylt   CeedVector x, y;
9*d1d35e2fSjeremylt   CeedInt num_elem = 3;
10*d1d35e2fSjeremylt   CeedInt ind[2*num_elem];
11*d1d35e2fSjeremylt   CeedScalar a[num_elem+1];
1257c64913Sjeremylt   const CeedScalar *yy;
1357c64913Sjeremylt   CeedElemRestriction r;
1457c64913Sjeremylt 
1557c64913Sjeremylt   CeedInit(argv[1], &ceed);
16288c0443SJeremy L Thompson 
17*d1d35e2fSjeremylt   CeedVectorCreate(ceed, num_elem+1, &x);
18*d1d35e2fSjeremylt   for (CeedInt i=0; i<num_elem+1; i++)
19288c0443SJeremy L Thompson     a[i] = 10 + i;
2057c64913Sjeremylt   CeedVectorSetArray(x, CEED_MEM_HOST, CEED_USE_POINTER, a);
2157c64913Sjeremylt 
22*d1d35e2fSjeremylt   for (CeedInt i=0; i<num_elem; i++) {
2357c64913Sjeremylt     ind[2*i+0] = i;
2457c64913Sjeremylt     ind[2*i+1] = i+1;
2557c64913Sjeremylt   }
26*d1d35e2fSjeremylt   CeedElemRestrictionCreate(ceed, num_elem, 2, 1, 1, num_elem+1, CEED_MEM_HOST,
27288c0443SJeremy L Thompson                             CEED_USE_POINTER, ind, &r);
28*d1d35e2fSjeremylt   CeedVectorCreate(ceed, num_elem*2, &y);
2973d26085Sjeremylt   CeedVectorSetValue(y, 0); // Allocates array
30a8d32208Sjeremylt   CeedElemRestrictionApply(r, CEED_NOTRANSPOSE, x, y, CEED_REQUEST_IMMEDIATE);
31288c0443SJeremy L Thompson 
3257c64913Sjeremylt   CeedVectorGetArrayRead(y, CEED_MEM_HOST, &yy);
33*d1d35e2fSjeremylt   for (CeedInt i=0; i<num_elem*2; i++)
3457c64913Sjeremylt     if (10+(i+1)/2 != yy[i])
35a2546046Sjeremylt       // LCOV_EXCL_START
36d863ab9bSjeremylt       printf("Error in restricted array y[%d] = %f",
3757c64913Sjeremylt              i, (double)yy[i]);
38de996c55Sjeremylt   // LCOV_EXCL_STOP
3957c64913Sjeremylt   CeedVectorRestoreArrayRead(y, &yy);
40a2546046Sjeremylt 
4157c64913Sjeremylt   CeedVectorDestroy(&x);
4257c64913Sjeremylt   CeedVectorDestroy(&y);
4357c64913Sjeremylt   CeedElemRestrictionDestroy(&r);
4457c64913Sjeremylt   CeedDestroy(&ceed);
4557c64913Sjeremylt   return 0;
4657c64913Sjeremylt }
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