1 static char help[] = "Tests PetscIsCloseAtTol() routine.\n"; 2 3 #include <petscsys.h> 4 5 PETSC_INTERN PetscReal zero; 6 PetscReal zero = 0; 7 PETSC_INTERN PetscReal zero2; 8 PetscReal zero2 = 0; 9 10 #define CALL(call) PetscCall(PetscPrintf(PETSC_COMM_WORLD,"%s -> %s\n",#call,(call)?"True":"False")) 11 12 int main(int argc, char **argv) { 13 14 PetscReal eps = PETSC_MACHINE_EPSILON; 15 PetscReal neg_zero = PetscRealConstant(-0.0); 16 PetscReal pos_zero = PetscRealConstant(+0.0); 17 PetscReal neg_one = PetscRealConstant(-1.0); 18 PetscReal pos_one = PetscRealConstant(+1.0); 19 PetscReal neg_inf = neg_one/zero; /* -inf */ 20 PetscReal pos_inf = pos_one/zero; /* +inf */ 21 PetscReal x_nan = zero2/zero; /* NaN */ /* some compilers may optimize out zero/zero and set x_nan = 1! */ 22 23 PetscFunctionBeginUser; 24 PetscCall(PetscInitialize(&argc,&argv,NULL,help)); 25 26 CALL(PetscIsCloseAtTol(pos_zero,neg_zero,0,0)); 27 CALL(PetscIsCloseAtTol(pos_one,pos_one,0,0)); 28 CALL(PetscIsCloseAtTol(pos_one,neg_one,0,0)); 29 CALL(PetscIsCloseAtTol(pos_one,neg_one,0,2)); 30 CALL(PetscIsCloseAtTol(pos_one,neg_one,2,0)); 31 32 CALL(PetscIsCloseAtTol(pos_one+eps,pos_one,0,0)); 33 CALL(PetscIsCloseAtTol(pos_one-eps,pos_one,0,0)); 34 CALL(PetscIsCloseAtTol(pos_one+eps,pos_one,0,0)); 35 CALL(PetscIsCloseAtTol(pos_one-eps,pos_one,0,0)); 36 37 CALL(PetscIsCloseAtTol(pos_one+eps,pos_one,0,eps)); 38 CALL(PetscIsCloseAtTol(pos_one-eps,pos_one,0,eps)); 39 CALL(PetscIsCloseAtTol(pos_one+eps,pos_one,eps,0)); 40 CALL(PetscIsCloseAtTol(pos_one-eps,pos_one,eps,0)); 41 42 CALL(PetscIsCloseAtTol(pos_one+2*eps,pos_one,eps,0)); 43 CALL(PetscIsCloseAtTol(pos_one-2*eps,pos_one,eps,0)); 44 CALL(PetscIsCloseAtTol(pos_one+2*eps,pos_one,0,eps)); 45 CALL(PetscIsCloseAtTol(pos_one-2*eps,pos_one,0,eps)); 46 47 CALL(PetscIsCloseAtTol(neg_inf,neg_zero,2,2)); 48 CALL(PetscIsCloseAtTol(neg_inf,pos_zero,2,2)); 49 CALL(PetscIsCloseAtTol(neg_inf,neg_one,2,2)); 50 CALL(PetscIsCloseAtTol(neg_inf,pos_one,2,2)); 51 CALL(PetscIsCloseAtTol(neg_inf,neg_inf,2,2)); 52 CALL(PetscIsCloseAtTol(neg_inf,pos_inf,2,2)); 53 CALL(PetscIsCloseAtTol(neg_inf,x_nan,2,2)); 54 55 CALL(PetscIsCloseAtTol(pos_inf,neg_zero,2,2)); 56 CALL(PetscIsCloseAtTol(pos_inf,pos_zero,2,2)); 57 CALL(PetscIsCloseAtTol(pos_inf,neg_one,2,2)); 58 CALL(PetscIsCloseAtTol(pos_inf,pos_one,2,2)); 59 CALL(PetscIsCloseAtTol(pos_inf,neg_inf,2,2)); 60 CALL(PetscIsCloseAtTol(pos_inf,pos_inf,2,2)); 61 CALL(PetscIsCloseAtTol(pos_inf,x_nan,2,2)); 62 63 CALL(PetscIsCloseAtTol(x_nan,neg_zero,2,2)); 64 CALL(PetscIsCloseAtTol(x_nan,pos_zero,2,2)); 65 CALL(PetscIsCloseAtTol(x_nan,neg_one,2,2)); 66 CALL(PetscIsCloseAtTol(x_nan,pos_one,2,2)); 67 CALL(PetscIsCloseAtTol(x_nan,neg_inf,2,2)); 68 CALL(PetscIsCloseAtTol(x_nan,pos_inf,2,2)); 69 CALL(PetscIsCloseAtTol(x_nan,x_nan,2,2)); 70 71 PetscCall(PetscFinalize()); 72 return 0; 73 } 74 75 /*TEST 76 77 test: 78 output_file: output/ex39.out 79 80 TEST*/ 81