1c4762a1bSJed Brown 2c4762a1bSJed Brown static char help[] = "Tests MatMult() on MatLoad() matrix \n\n"; 3c4762a1bSJed Brown 4c4762a1bSJed Brown #include <petscmat.h> 5c4762a1bSJed Brown 6*d71ae5a4SJacob Faibussowitsch int main(int argc, char **args) 7*d71ae5a4SJacob Faibussowitsch { 8c4762a1bSJed Brown Mat A; 9c4762a1bSJed Brown Vec x, b; 10c4762a1bSJed Brown PetscViewer fd; /* viewer */ 11c4762a1bSJed Brown char file[PETSC_MAX_PATH_LEN]; /* input file name */ 12c4762a1bSJed Brown PetscBool flg; 13c4762a1bSJed Brown 14327415f7SBarry Smith PetscFunctionBeginUser; 159566063dSJacob Faibussowitsch PetscCall(PetscInitialize(&argc, &args, (char *)0, help)); 16c4762a1bSJed Brown /* Determine file from which we read the matrix A */ 179566063dSJacob Faibussowitsch PetscCall(PetscOptionsGetString(NULL, NULL, "-f", file, sizeof(file), &flg)); 1828b400f6SJacob Faibussowitsch PetscCheck(flg, PETSC_COMM_WORLD, PETSC_ERR_USER, "Must indicate binary file with the -f option"); 19c4762a1bSJed Brown 20c4762a1bSJed Brown /* Load matrix A */ 219566063dSJacob Faibussowitsch PetscCall(PetscViewerBinaryOpen(PETSC_COMM_WORLD, file, FILE_MODE_READ, &fd)); 229566063dSJacob Faibussowitsch PetscCall(MatCreate(PETSC_COMM_WORLD, &A)); 239566063dSJacob Faibussowitsch PetscCall(MatLoad(A, fd)); 24c4762a1bSJed Brown flg = PETSC_FALSE; 259566063dSJacob Faibussowitsch PetscCall(VecCreate(PETSC_COMM_WORLD, &x)); 269566063dSJacob Faibussowitsch PetscCall(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; 319566063dSJacob Faibussowitsch PetscCall(PetscInfo(0, "Using vector of ones for RHS\n")); 329566063dSJacob Faibussowitsch PetscCall(MatGetLocalSize(A, &m, NULL)); 339566063dSJacob Faibussowitsch PetscCall(VecSetSizes(x, m, PETSC_DECIDE)); 349566063dSJacob Faibussowitsch PetscCall(VecSetFromOptions(x)); 359566063dSJacob Faibussowitsch PetscCall(VecSet(x, one)); 36c4762a1bSJed Brown } 37c4762a1bSJed Brown } else { 389566063dSJacob Faibussowitsch PetscCall(VecLoad(x, fd)); 399566063dSJacob Faibussowitsch PetscCall(PetscViewerDestroy(&fd)); 40c4762a1bSJed Brown } 419566063dSJacob Faibussowitsch PetscCall(VecDuplicate(x, &b)); 429566063dSJacob Faibussowitsch PetscCall(MatMult(A, x, b)); 43c4762a1bSJed Brown 44c4762a1bSJed Brown /* Print (for testing only) */ 459566063dSJacob Faibussowitsch PetscCall(MatView(A, 0)); 469566063dSJacob Faibussowitsch PetscCall(VecView(b, 0)); 47c4762a1bSJed Brown /* Free data structures */ 489566063dSJacob Faibussowitsch PetscCall(MatDestroy(&A)); 499566063dSJacob Faibussowitsch PetscCall(VecDestroy(&x)); 509566063dSJacob Faibussowitsch PetscCall(VecDestroy(&b)); 519566063dSJacob Faibussowitsch PetscCall(PetscFinalize()); 52b122ec5aSJacob Faibussowitsch return 0; 53c4762a1bSJed Brown } 54