485   MatMFFD mfctx;  in MatMFFDSetOptionsPrefix()  local
489   PetscCall(MatShellGetContext(mat, &mfctx));  in MatMFFDSetOptionsPrefix()
490   PetscValidHeaderSpecific(mfctx, MATMFFD_CLASSID, 1);  in MatMFFDSetOptionsPrefix()
491   PetscCall(PetscObjectSetOptionsPrefix((PetscObject)mfctx, prefix));  in MatMFFDSetOptionsPrefix()
497   MatMFFD   mfctx;  in MatSetFromOptions_MFFD()  local
502   PetscCall(MatShellGetContext(mat, &mfctx));  in MatSetFromOptions_MFFD()
503   PetscValidHeaderSpecific(mfctx, MATMFFD_CLASSID, 1);  in MatSetFromOptions_MFFD()
504   PetscObjectOptionsBegin((PetscObject)mfctx);  in MatSetFromOptions_MFFD()
505 …d_type", "Matrix free type", "MatMFFDSetType", MatMFFDList, ((PetscObject)mfctx)->type_name, ftype…  in MatSetFromOptions_MFFD()
508 …et sqrt relative error in function", "MatMFFDSetFunctionError", mfctx->error_rel, &mfctx->error_re…  in MatSetFromOptions_MFFD()
509 …fd_period", "how often h is recomputed", "MatMFFDSetPeriod", mfctx->recomputeperiod, &mfctx->recom…  in MatSetFromOptions_MFFD()
515 …lex number trick to compute the matrix-vector product", "None", mfctx->usecomplex, &mfctx->usecomp…  in MatSetFromOptions_MFFD()
517   PetscTryTypeMethod(mfctx, setfromoptions, PetscOptionsObject);  in MatSetFromOptions_MFFD()
584   MatMFFD mfctx;  in MatCreate_MFFD()  local
589 …PetscCall(PetscHeaderCreate(mfctx, MATMFFD_CLASSID, "MatMFFD", "Matrix-free Finite Differencing", …  in MatCreate_MFFD()
591   mfctx->error_rel                = PETSC_SQRT_MACHINE_EPSILON;  in MatCreate_MFFD()
592   mfctx->recomputeperiod          = 1;  in MatCreate_MFFD()
593   mfctx->count                    = 0;  in MatCreate_MFFD()
594   mfctx->currenth                 = 0.0;  in MatCreate_MFFD()
595   mfctx->historyh                 = NULL;  in MatCreate_MFFD()
596   mfctx->ncurrenth                = 0;  in MatCreate_MFFD()
597   mfctx->maxcurrenth              = 0;  in MatCreate_MFFD()
598   ((PetscObject)mfctx)->type_name = NULL;  in MatCreate_MFFD()
606   mfctx->ops->compute        = NULL;  in MatCreate_MFFD()
607   mfctx->ops->destroy        = NULL;  in MatCreate_MFFD()
608   mfctx->ops->view           = NULL;  in MatCreate_MFFD()
609   mfctx->ops->setfromoptions = NULL;  in MatCreate_MFFD()
610   mfctx->hctx                = NULL;  in MatCreate_MFFD()
612   mfctx->func    = NULL;  in MatCreate_MFFD()
613   mfctx->funcctx = NULL;  in MatCreate_MFFD()
614   mfctx->w       = NULL;  in MatCreate_MFFD()
615   mfctx->mat     = A;  in MatCreate_MFFD()
618   PetscCall(MatShellSetContext(A, mfctx));  in MatCreate_MFFD()