1 2 static char help[] = "Demonstrates PetscOptionsPush()/PetscOptionsPop().\n\n"; 3 4 #include <petscsys.h> 5 #include <petscoptions.h> 6 int main(int argc,char **argv) 7 { 8 PetscErrorCode ierr; 9 PetscOptions opt1,opt2; 10 PetscInt int1,int2; 11 PetscBool flg1,flg2,flga,match; 12 char str[16]; 13 14 ierr = PetscInitialize(&argc,&argv,(char*)0,help);if (ierr) return ierr; 15 16 ierr = PetscOptionsCreate(&opt1);CHKERRQ(ierr); 17 ierr = PetscOptionsInsertString(opt1,"-testa a");CHKERRQ(ierr); 18 ierr = PetscOptionsPush(opt1);CHKERRQ(ierr); 19 ierr = PetscOptionsSetValue(NULL,"-test1","1");CHKERRQ(ierr); 20 ierr = PetscOptionsGetInt(NULL,NULL,"-test1",&int1,&flg1);CHKERRQ(ierr); 21 if (!flg1 || int1 != 1) SETERRQ(PETSC_COMM_WORLD,PETSC_ERR_PLIB,"Unable to locate option test1 or it has the wrong value"); 22 ierr = PetscOptionsGetString(NULL,NULL,"-testa",str,sizeof(str),&flga);CHKERRQ(ierr); 23 ierr = PetscStrcmp(str,"a",&match);CHKERRQ(ierr); 24 if (!flga|| !match) SETERRQ(PETSC_COMM_WORLD,PETSC_ERR_PLIB,"Unable to locate option testa or it has the wrong value"); 25 ierr = PetscOptionsCreate(&opt2);CHKERRQ(ierr); 26 ierr = PetscOptionsPush(opt2);CHKERRQ(ierr); 27 ierr = PetscOptionsSetValue(NULL,"-test2","2");CHKERRQ(ierr); 28 ierr = PetscOptionsGetInt(NULL,NULL,"-test2",&int2,&flg2);CHKERRQ(ierr); 29 if (!flg2 || int2 != 2) SETERRQ(PETSC_COMM_WORLD,PETSC_ERR_PLIB,"Unable to locate option test2 or it has the wrong value"); 30 ierr = PetscOptionsGetInt(NULL,NULL,"-test1",&int1,&flg1);CHKERRQ(ierr); 31 if (flg1) SETERRQ(PETSC_COMM_WORLD,PETSC_ERR_PLIB,"Able to access test1 from a different options database"); 32 33 ierr = PetscOptionsPop();CHKERRQ(ierr); 34 ierr = PetscOptionsPop();CHKERRQ(ierr); 35 ierr = PetscOptionsDestroy(&opt2);CHKERRQ(ierr); 36 ierr = PetscOptionsDestroy(&opt1);CHKERRQ(ierr); 37 ierr = PetscFinalize(); 38 return ierr; 39 } 40 41 /*TEST 42 43 test: 44 45 TEST*/ 46