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 */ 17589a23caSBarry Smith ierr = PetscOptionsGetString(NULL,NULL,"-f",file,sizeof(file),&flg);CHKERRQ(ierr); 18*2c71b3e2SJacob Faibussowitsch PetscCheckFalse(!flg,PETSC_COMM_WORLD,PETSC_ERR_USER,"Must indicate binary file with the -f option"); 19c4762a1bSJed Brown 20c4762a1bSJed Brown /* Load matrix A */ 21c4762a1bSJed Brown ierr = PetscViewerBinaryOpen(PETSC_COMM_WORLD,file,FILE_MODE_READ,&fd);CHKERRQ(ierr); 22c4762a1bSJed Brown ierr = MatCreate(PETSC_COMM_WORLD,&A);CHKERRQ(ierr); 23c4762a1bSJed Brown ierr = MatLoad(A,fd);CHKERRQ(ierr); 24c4762a1bSJed Brown flg = PETSC_FALSE; 25c4762a1bSJed Brown ierr = VecCreate(PETSC_COMM_WORLD,&x);CHKERRQ(ierr); 26589a23caSBarry Smith ierr = PetscOptionsGetString(NULL,NULL,"-vec",file,sizeof(file),&flg);CHKERRQ(ierr); 27c4762a1bSJed Brown if (flg) { 28c4762a1bSJed Brown if (file[0] == '0') { 29c4762a1bSJed Brown PetscInt m; 30c4762a1bSJed Brown PetscScalar one = 1.0; 31c4762a1bSJed Brown ierr = PetscInfo(0,"Using vector of ones for RHS\n");CHKERRQ(ierr); 32c4762a1bSJed Brown ierr = MatGetLocalSize(A,&m,NULL);CHKERRQ(ierr); 33c4762a1bSJed Brown ierr = VecSetSizes(x,m,PETSC_DECIDE);CHKERRQ(ierr); 34c4762a1bSJed Brown ierr = VecSetFromOptions(x);CHKERRQ(ierr); 35c4762a1bSJed Brown ierr = VecSet(x,one);CHKERRQ(ierr); 36c4762a1bSJed Brown } 37c4762a1bSJed Brown } else { 38c4762a1bSJed Brown ierr = VecLoad(x,fd);CHKERRQ(ierr); 39c4762a1bSJed Brown ierr = PetscViewerDestroy(&fd);CHKERRQ(ierr); 40c4762a1bSJed Brown } 41c4762a1bSJed Brown ierr = VecDuplicate(x,&b);CHKERRQ(ierr); 42c4762a1bSJed Brown ierr = MatMult(A,x,b);CHKERRQ(ierr); 43c4762a1bSJed Brown 44c4762a1bSJed Brown /* Print (for testing only) */ 45c4762a1bSJed Brown ierr = MatView(A,0);CHKERRQ(ierr); 46c4762a1bSJed Brown ierr = VecView(b,0);CHKERRQ(ierr); 47c4762a1bSJed Brown /* Free data structures */ 48c4762a1bSJed Brown ierr = MatDestroy(&A);CHKERRQ(ierr); 49c4762a1bSJed Brown ierr = VecDestroy(&x);CHKERRQ(ierr); 50c4762a1bSJed Brown ierr = VecDestroy(&b);CHKERRQ(ierr); 51c4762a1bSJed Brown ierr = PetscFinalize(); 52c4762a1bSJed Brown return ierr; 53c4762a1bSJed Brown } 54