1*c4762a1bSJed Brown 2*c4762a1bSJed Brown static char help[] = "Tests MatMult() on MatLoad() matrix \n\n"; 3*c4762a1bSJed Brown 4*c4762a1bSJed Brown #include <petscmat.h> 5*c4762a1bSJed Brown 6*c4762a1bSJed Brown int main(int argc,char **args) 7*c4762a1bSJed Brown { 8*c4762a1bSJed Brown Mat A; 9*c4762a1bSJed Brown Vec x,b; 10*c4762a1bSJed Brown PetscErrorCode ierr; 11*c4762a1bSJed Brown PetscViewer fd; /* viewer */ 12*c4762a1bSJed Brown char file[PETSC_MAX_PATH_LEN]; /* input file name */ 13*c4762a1bSJed Brown PetscBool flg; 14*c4762a1bSJed Brown 15*c4762a1bSJed Brown ierr = PetscInitialize(&argc,&args,(char*)0,help);if (ierr) return ierr; 16*c4762a1bSJed Brown /* Determine file from which we read the matrix A */ 17*c4762a1bSJed Brown ierr = PetscOptionsGetString(NULL,NULL,"-f",file,PETSC_MAX_PATH_LEN,&flg);CHKERRQ(ierr); 18*c4762a1bSJed Brown if (!flg) SETERRQ(PETSC_COMM_WORLD,PETSC_ERR_USER,"Must indicate binary file with the -f option"); 19*c4762a1bSJed Brown 20*c4762a1bSJed Brown /* Load matrix A */ 21*c4762a1bSJed Brown ierr = PetscViewerBinaryOpen(PETSC_COMM_WORLD,file,FILE_MODE_READ,&fd);CHKERRQ(ierr); 22*c4762a1bSJed Brown ierr = MatCreate(PETSC_COMM_WORLD,&A);CHKERRQ(ierr); 23*c4762a1bSJed Brown ierr = MatLoad(A,fd);CHKERRQ(ierr); 24*c4762a1bSJed Brown flg = PETSC_FALSE; 25*c4762a1bSJed Brown ierr = VecCreate(PETSC_COMM_WORLD,&x);CHKERRQ(ierr); 26*c4762a1bSJed Brown ierr = PetscOptionsGetString(NULL,NULL,"-vec",file,PETSC_MAX_PATH_LEN,&flg);CHKERRQ(ierr); 27*c4762a1bSJed Brown if (flg) { 28*c4762a1bSJed Brown if (file[0] == '0') { 29*c4762a1bSJed Brown PetscInt m; 30*c4762a1bSJed Brown PetscScalar one = 1.0; 31*c4762a1bSJed Brown ierr = PetscInfo(0,"Using vector of ones for RHS\n");CHKERRQ(ierr); 32*c4762a1bSJed Brown ierr = MatGetLocalSize(A,&m,NULL);CHKERRQ(ierr); 33*c4762a1bSJed Brown ierr = VecSetSizes(x,m,PETSC_DECIDE);CHKERRQ(ierr); 34*c4762a1bSJed Brown ierr = VecSetFromOptions(x);CHKERRQ(ierr); 35*c4762a1bSJed Brown ierr = VecSet(x,one);CHKERRQ(ierr); 36*c4762a1bSJed Brown } 37*c4762a1bSJed Brown } else { 38*c4762a1bSJed Brown ierr = VecLoad(x,fd);CHKERRQ(ierr); 39*c4762a1bSJed Brown ierr = PetscViewerDestroy(&fd);CHKERRQ(ierr); 40*c4762a1bSJed Brown } 41*c4762a1bSJed Brown ierr = VecDuplicate(x,&b);CHKERRQ(ierr); 42*c4762a1bSJed Brown ierr = MatMult(A,x,b);CHKERRQ(ierr); 43*c4762a1bSJed Brown 44*c4762a1bSJed Brown /* Print (for testing only) */ 45*c4762a1bSJed Brown ierr = MatView(A,0);CHKERRQ(ierr); 46*c4762a1bSJed Brown ierr = VecView(b,0);CHKERRQ(ierr); 47*c4762a1bSJed Brown /* Free data structures */ 48*c4762a1bSJed Brown ierr = MatDestroy(&A);CHKERRQ(ierr); 49*c4762a1bSJed Brown ierr = VecDestroy(&x);CHKERRQ(ierr); 50*c4762a1bSJed Brown ierr = VecDestroy(&b);CHKERRQ(ierr); 51*c4762a1bSJed Brown ierr = PetscFinalize(); 52*c4762a1bSJed Brown return ierr; 53*c4762a1bSJed Brown } 54