petsc-3.14.5 2021-03-03
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# SNESLineSearchGetPreCheck

Gets the pre-check function for the line search routine.

### Synopsis

    #include "petscsnes.h"
    PetscErrorCode  SNESLineSearchGetPreCheck(SNESLineSearch linesearch, PetscErrorCode (**func)(SNESLineSearch,Vec,Vec,PetscBool*,void*),void **ctx)

### Input Parameters

| linesearch | - the SNESLineSearch context

### Output Parameters

| func | - [optional] function evaluation routine, see SNESLineSearchPreCheck() for calling sequence
| ctx | - [optional] user-defined context for private data for the function evaluation routine (may be NULL)

### See Also

SNESGetLineSearch(), SNESGetLineSearch(), SNESLineSearchPreCheck(), SNESLineSearchGetPostCheck(), SNESLineSearchSetPreCheck(), SNESLineSearchSetPostCheck()

### Level

intermediate

### Location

src/snes/linesearch/interface/linesearch.c
Index of all SNES routines
Table of Contents for all manual pages
Index of all manual pages