petsc-3.14.5 2021-03-03
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# PCGetOptionsPrefix

Gets the prefix used for searching for all PC options in the database.

### Synopsis

    #include "petscksp.h"
    PetscErrorCode  PCGetOptionsPrefix(PC pc,const char *prefix[])

Not Collective

### Input Parameters

| pc | - the preconditioner context

### Output Parameters

| prefix | - pointer to the prefix string used, is returned

### Notes

On the fortran side, the user should pass in a string 'prifix' of sufficient length to hold the prefix.

### See Also

PCSetOptionsPrefix(), PCAppendOptionsPrefix()

### Level

advanced

### Location

src/ksp/pc/interface/precon.c
Index of all PC routines
Table of Contents for all manual pages
Index of all manual pages