1c4762a1bSJed Brown static char help[] = "Tests MatMult() on MatLoad() matrix \n\n"; 2c4762a1bSJed Brown 3c4762a1bSJed Brown #include <petscmat.h> 4c4762a1bSJed Brown 5d71ae5a4SJacob Faibussowitsch int main(int argc, char **args) 6d71ae5a4SJacob Faibussowitsch { 7c4762a1bSJed Brown Mat A; 8c4762a1bSJed Brown Vec x, b; 9c4762a1bSJed Brown PetscViewer fd; /* viewer */ 10c4762a1bSJed Brown char file[PETSC_MAX_PATH_LEN]; /* input file name */ 11c4762a1bSJed Brown PetscBool flg; 12c4762a1bSJed Brown 13327415f7SBarry Smith PetscFunctionBeginUser; 14*c8025a54SPierre Jolivet PetscCall(PetscInitialize(&argc, &args, NULL, help)); 15c4762a1bSJed Brown /* Determine file from which we read the matrix A */ 169566063dSJacob Faibussowitsch PetscCall(PetscOptionsGetString(NULL, NULL, "-f", file, sizeof(file), &flg)); 1728b400f6SJacob Faibussowitsch PetscCheck(flg, PETSC_COMM_WORLD, PETSC_ERR_USER, "Must indicate binary file with the -f option"); 18c4762a1bSJed Brown 19c4762a1bSJed Brown /* Load matrix A */ 209566063dSJacob Faibussowitsch PetscCall(PetscViewerBinaryOpen(PETSC_COMM_WORLD, file, FILE_MODE_READ, &fd)); 219566063dSJacob Faibussowitsch PetscCall(MatCreate(PETSC_COMM_WORLD, &A)); 229566063dSJacob Faibussowitsch PetscCall(MatLoad(A, fd)); 23c4762a1bSJed Brown flg = PETSC_FALSE; 249566063dSJacob Faibussowitsch PetscCall(VecCreate(PETSC_COMM_WORLD, &x)); 259566063dSJacob Faibussowitsch PetscCall(PetscOptionsGetString(NULL, NULL, "-vec", file, sizeof(file), &flg)); 26c4762a1bSJed Brown if (flg) { 27c4762a1bSJed Brown if (file[0] == '0') { 28c4762a1bSJed Brown PetscInt m; 29c4762a1bSJed Brown PetscScalar one = 1.0; 309566063dSJacob Faibussowitsch PetscCall(PetscInfo(0, "Using vector of ones for RHS\n")); 319566063dSJacob Faibussowitsch PetscCall(MatGetLocalSize(A, &m, NULL)); 329566063dSJacob Faibussowitsch PetscCall(VecSetSizes(x, m, PETSC_DECIDE)); 339566063dSJacob Faibussowitsch PetscCall(VecSetFromOptions(x)); 349566063dSJacob Faibussowitsch PetscCall(VecSet(x, one)); 35c4762a1bSJed Brown } 36c4762a1bSJed Brown } else { 379566063dSJacob Faibussowitsch PetscCall(VecLoad(x, fd)); 389566063dSJacob Faibussowitsch PetscCall(PetscViewerDestroy(&fd)); 39c4762a1bSJed Brown } 409566063dSJacob Faibussowitsch PetscCall(VecDuplicate(x, &b)); 419566063dSJacob Faibussowitsch PetscCall(MatMult(A, x, b)); 42c4762a1bSJed Brown 43c4762a1bSJed Brown /* Print (for testing only) */ 449566063dSJacob Faibussowitsch PetscCall(MatView(A, 0)); 459566063dSJacob Faibussowitsch PetscCall(VecView(b, 0)); 46c4762a1bSJed Brown /* Free data structures */ 479566063dSJacob Faibussowitsch PetscCall(MatDestroy(&A)); 489566063dSJacob Faibussowitsch PetscCall(VecDestroy(&x)); 499566063dSJacob Faibussowitsch PetscCall(VecDestroy(&b)); 509566063dSJacob Faibussowitsch PetscCall(PetscFinalize()); 51b122ec5aSJacob Faibussowitsch return 0; 52c4762a1bSJed Brown } 53