1c4762a1bSJed Brown 2c4762a1bSJed Brown static char help[] = "Tests MatMult() on MatLoad() matrix \n\n"; 3c4762a1bSJed Brown 4c4762a1bSJed Brown #include <petscmat.h> 5c4762a1bSJed Brown 6c4762a1bSJed Brown int main(int argc,char **args) 7c4762a1bSJed Brown { 8c4762a1bSJed Brown Mat A; 9c4762a1bSJed Brown Vec x,b; 10c4762a1bSJed Brown PetscErrorCode ierr; 11c4762a1bSJed Brown PetscViewer fd; /* viewer */ 12c4762a1bSJed Brown char file[PETSC_MAX_PATH_LEN]; /* input file name */ 13c4762a1bSJed Brown PetscBool flg; 14c4762a1bSJed Brown 15c4762a1bSJed Brown ierr = PetscInitialize(&argc,&args,(char*)0,help);if (ierr) return ierr; 16c4762a1bSJed Brown /* Determine file from which we read the matrix A */ 17*5f80ce2aSJacob Faibussowitsch CHKERRQ(PetscOptionsGetString(NULL,NULL,"-f",file,sizeof(file),&flg)); 182c71b3e2SJacob Faibussowitsch PetscCheckFalse(!flg,PETSC_COMM_WORLD,PETSC_ERR_USER,"Must indicate binary file with the -f option"); 19c4762a1bSJed Brown 20c4762a1bSJed Brown /* Load matrix A */ 21*5f80ce2aSJacob Faibussowitsch CHKERRQ(PetscViewerBinaryOpen(PETSC_COMM_WORLD,file,FILE_MODE_READ,&fd)); 22*5f80ce2aSJacob Faibussowitsch CHKERRQ(MatCreate(PETSC_COMM_WORLD,&A)); 23*5f80ce2aSJacob Faibussowitsch CHKERRQ(MatLoad(A,fd)); 24c4762a1bSJed Brown flg = PETSC_FALSE; 25*5f80ce2aSJacob Faibussowitsch CHKERRQ(VecCreate(PETSC_COMM_WORLD,&x)); 26*5f80ce2aSJacob Faibussowitsch CHKERRQ(PetscOptionsGetString(NULL,NULL,"-vec",file,sizeof(file),&flg)); 27c4762a1bSJed Brown if (flg) { 28c4762a1bSJed Brown if (file[0] == '0') { 29c4762a1bSJed Brown PetscInt m; 30c4762a1bSJed Brown PetscScalar one = 1.0; 31*5f80ce2aSJacob Faibussowitsch CHKERRQ(PetscInfo(0,"Using vector of ones for RHS\n")); 32*5f80ce2aSJacob Faibussowitsch CHKERRQ(MatGetLocalSize(A,&m,NULL)); 33*5f80ce2aSJacob Faibussowitsch CHKERRQ(VecSetSizes(x,m,PETSC_DECIDE)); 34*5f80ce2aSJacob Faibussowitsch CHKERRQ(VecSetFromOptions(x)); 35*5f80ce2aSJacob Faibussowitsch CHKERRQ(VecSet(x,one)); 36c4762a1bSJed Brown } 37c4762a1bSJed Brown } else { 38*5f80ce2aSJacob Faibussowitsch CHKERRQ(VecLoad(x,fd)); 39*5f80ce2aSJacob Faibussowitsch CHKERRQ(PetscViewerDestroy(&fd)); 40c4762a1bSJed Brown } 41*5f80ce2aSJacob Faibussowitsch CHKERRQ(VecDuplicate(x,&b)); 42*5f80ce2aSJacob Faibussowitsch CHKERRQ(MatMult(A,x,b)); 43c4762a1bSJed Brown 44c4762a1bSJed Brown /* Print (for testing only) */ 45*5f80ce2aSJacob Faibussowitsch CHKERRQ(MatView(A,0)); 46*5f80ce2aSJacob Faibussowitsch CHKERRQ(VecView(b,0)); 47c4762a1bSJed Brown /* Free data structures */ 48*5f80ce2aSJacob Faibussowitsch CHKERRQ(MatDestroy(&A)); 49*5f80ce2aSJacob Faibussowitsch CHKERRQ(VecDestroy(&x)); 50*5f80ce2aSJacob Faibussowitsch CHKERRQ(VecDestroy(&b)); 51c4762a1bSJed Brown ierr = PetscFinalize(); 52c4762a1bSJed Brown return ierr; 53c4762a1bSJed Brown } 54