1 /// @file 2 /// Test scaling a vector 3 /// \test Test scaling of a vector 4 5 //TESTARGS(name="length 10") {ceed_resource} 10 6 //TESTARGS(name="length 0") {ceed_resource} 0 7 #include <ceed.h> 8 #include <math.h> 9 #include <stdio.h> 10 #include <stdlib.h> 11 12 int main(int argc, char **argv) { 13 Ceed ceed; 14 CeedVector x; 15 CeedInt len = 10; 16 17 CeedInit(argv[1], &ceed); 18 len = argc > 2 ? atoi(argv[2]) : len; 19 20 CeedVectorCreate(ceed, len, &x); 21 { 22 CeedScalar array[len]; 23 24 for (CeedInt i = 0; i < len; i++) array[i] = 10 + i; 25 CeedVectorSetArray(x, CEED_MEM_HOST, CEED_COPY_VALUES, array); 26 } 27 { 28 // Sync memtype to device for GPU backends 29 CeedMemType type = CEED_MEM_HOST; 30 CeedGetPreferredMemType(ceed, &type); 31 CeedVectorSyncArray(x, type); 32 } 33 CeedVectorScale(x, -0.5); 34 35 { 36 const CeedScalar *read_array; 37 38 CeedVectorGetArrayRead(x, CEED_MEM_HOST, &read_array); 39 for (CeedInt i = 0; i < len; i++) { 40 if (fabs(read_array[i] + (10.0 + i) / 2) > 1e-14) { 41 // LCOV_EXCL_START 42 printf("Error in alpha x at index %" CeedInt_FMT ", computed: %f actual: %f\n", i, read_array[i], -(10.0 + i) / 2); 43 // LCOV_EXCL_STOP 44 } 45 } 46 CeedVectorRestoreArrayRead(x, &read_array); 47 } 48 49 CeedVectorDestroy(&x); 50 CeedDestroy(&ceed); 51 return 0; 52 } 53