Date: 2026-03-31T13:23:32+00:00

Actual source code: zkrylovschurf.c

      1: /*
      2:    - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
      3:    SLEPc - Scalable Library for Eigenvalue Problem Computations
      4:    Copyright (c) 2002-, Universitat Politecnica de Valencia, Spain

      6:    This file is part of SLEPc.
      7:    SLEPc is distributed under a 2-clause BSD license (see LICENSE).
      8:    - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
      9: */

     11: #include <petsc/private/ftnimpl.h>
     12: #include <slepceps.h>

     14: #if defined(PETSC_HAVE_FORTRAN_CAPS)
     15: #define epskrylovschurgetsubintervals_    EPSKRYLOVSCHURGETSUBINTERVALS
     16: #define epskrylovschurgetinertias_        EPSKRYLOVSCHURGETINERTIAS
     17: #elif !defined(PETSC_HAVE_FORTRAN_UNDERSCORE)
     18: #define epskrylovschurgetsubintervals_    epskrylovschurgetsubintervals
     19: #define epskrylovschurgetinertias_        epskrylovschurgetinertias
     20: #endif

     22: SLEPC_EXTERN void epskrylovschurgetsubintervals_(EPS *eps,PetscReal *subint,PetscErrorCode *ierr)
     23: {
     24:   PetscReal *osubint;
     25:   PetscInt  npart;

     27:   CHKFORTRANNULLREAL(subint);
     28:   *ierr = EPSKrylovSchurGetSubintervals(*eps,&osubint); if (*ierr) return;
     29:   *ierr = EPSKrylovSchurGetPartitions(*eps,&npart); if (*ierr) return;
     30:   *ierr = PetscArraycpy(subint,osubint,npart+1); if (*ierr) return;
     31:   *ierr = PetscFree(osubint);
     32: }

     34: SLEPC_EXTERN void epskrylovschurgetinertias_(EPS *eps,PetscInt *nshift,PetscReal *shifts,PetscInt *inertias,PetscErrorCode *ierr)
     35: {
     36:   PetscReal *oshifts;
     37:   PetscInt  *oinertias;
     38:   PetscInt  n;

     40:   CHKFORTRANNULLREAL(shifts);
     41:   CHKFORTRANNULLINTEGER(inertias);
     42:   *ierr = EPSKrylovSchurGetInertias(*eps,&n,&oshifts,&oinertias); if (*ierr) return;
     43:   if (shifts) { *ierr = PetscArraycpy(shifts,oshifts,n); if (*ierr) return; }
     44:   if (inertias) { *ierr = PetscArraycpy(inertias,oinertias,n); if (*ierr) return; }
     45:   *nshift = n;
     46:   *ierr = PetscFree(oshifts);if (*ierr) return;
     47:   *ierr = PetscFree(oinertias);
     48: }