1 /// @file 2 /// Test scaling a vector 3 /// \test Test scaling of a vector 4 #include <ceed.h> 5 #include <math.h> 6 7 int main(int argc, char **argv) { 8 Ceed ceed; 9 CeedVector x; 10 CeedInt n; 11 CeedScalar a[10]; 12 const CeedScalar *b; 13 14 CeedInit(argv[1], &ceed); 15 16 n = 10; 17 CeedVectorCreate(ceed, n, &x); 18 for (CeedInt i = 0; i < n; i++) a[i] = 10 + i; 19 CeedVectorSetArray(x, CEED_MEM_HOST, CEED_COPY_VALUES, a); 20 21 { 22 // Sync memtype to device for GPU backends 23 CeedMemType type = CEED_MEM_HOST; 24 CeedGetPreferredMemType(ceed, &type); 25 CeedVectorSyncArray(x, type); 26 } 27 CeedVectorScale(x, -0.5); 28 29 CeedVectorGetArrayRead(x, CEED_MEM_HOST, &b); 30 for (CeedInt i = 0; i < n; i++) { 31 if (fabs(b[i] + (10.0 + i) / 2) > 1e-14) { 32 // LCOV_EXCL_START 33 printf("Error in alpha x at index %" CeedInt_FMT ", computed: %f actual: %f\n", i, b[i], -(10.0 + i) / 2); 34 // LCOV_EXCL_STOP 35 } 36 } 37 CeedVectorRestoreArrayRead(x, &b); 38 39 CeedVectorDestroy(&x); 40 CeedDestroy(&ceed); 41 return 0; 42 } 43