1: #ifndef __TAOLINESEARCH_IMPL_H
  3: #include <petscvec.h>
  4: #include <petsc/private/petscimpl.h>
  5: #include <petsctaolinesearch.h>

  7: typedef struct _TaoLineSearchOps *TaoLineSearchOps;
  8: struct _TaoLineSearchOps {
  9:     PetscErrorCode (*computeobjective)(TaoLineSearch, Vec, PetscReal*, void*);
 10:     PetscErrorCode (*computegradient)(TaoLineSearch, Vec, Vec, void*);
 11:     PetscErrorCode (*computeobjectiveandgradient)(TaoLineSearch, Vec, PetscReal *, Vec, void*);
 12:     PetscErrorCode (*computeobjectiveandgts)(TaoLineSearch, Vec, Vec, PetscReal*, PetscReal*,void*);
 13:     PetscErrorCode (*setup)(TaoLineSearch);
 14:     PetscErrorCode (*apply)(TaoLineSearch,Vec,PetscReal*,Vec,Vec);
 15:     PetscErrorCode (*view)(TaoLineSearch,PetscViewer);
 16:     PetscErrorCode (*setfromoptions)(PetscOptionItems*,TaoLineSearch);
 17:     PetscErrorCode (*reset)(TaoLineSearch);
 18:     PetscErrorCode (*destroy)(TaoLineSearch);
 19: };

 21: struct _p_TaoLineSearch {
 22:     PETSCHEADER(struct _TaoLineSearchOps);
 23:     void *userctx_func;
 24:     void *userctx_grad;
 25:     void *userctx_funcgrad;
 26:     void *userctx_funcgts;

 28:     PetscBool setupcalled;
 29:     PetscBool usegts;
 30:     PetscBool usetaoroutines;
 31:     PetscBool hasobjective;
 32:     PetscBool hasgradient;
 33:     PetscBool hasobjectiveandgradient;
 34:     void *data;

 36:     /* bounds used for some line searches */
 37:     Vec lower;
 38:     Vec upper;
 39:     PetscInt bounded;

 41:     Vec start_x;
 42:     Vec stepdirection;
 43:     PetscReal f_fullstep;
 44:     PetscReal new_f;
 45:     Vec new_x;
 46:     Vec new_g;

 48:     PetscReal step;
 49:     PetscReal initstep;

 51:     PetscInt max_funcs;
 52:     PetscInt nfeval;
 53:     PetscInt ngeval;
 54:     PetscInt nfgeval;
 55:     TaoLineSearchConvergedReason reason;

 57:     PetscReal rtol;      /* relative tol for acceptable step (rtol>0) */
 58:     PetscReal ftol;      /* tol for sufficient decr. condition (ftol>0) */
 59:     PetscReal gtol;      /* tol for curvature condition (gtol>0)*/
 60:     PetscReal stepmin;   /* lower bound for step */
 61:     PetscReal stepmax;   /* upper bound for step */

 63:     Tao tao;
 64: };

 66: extern PetscLogEvent TaoLineSearch_ApplyEvent, TaoLineSearch_EvalEvent;
 67: #endif