#include <petsc/private/fortranimpl.h>
#include <petscsys.h>
#include <petscviewer.h>

#if defined(PETSC_HAVE_FORTRAN_CAPS)
#define petscpusherrorhandler_        PETSCPUSHERRORHANDLER
#define petsctracebackerrorhandler_   PETSCTRACEBACKERRORHANDLER
#define petscaborterrorhandler_       PETSCABORTERRORHANDLER
#define petscignoreerrorhandler_      PETSCIGNOREERRORHANDLER
#define petscemacsclienterrorhandler_ PETSCEMACSCLIENTERRORHANDLER
#define petscattachdebuggererrorhandler_   PETSCATTACHDEBUGGERERRORHANDLER
#define petscerror_                PETSCERROR
#define petscerrorf_                PETSCERRORF
#define petscerrormpi_             PETSCERRORMPI
#define petscrealview_             PETSCREALVIEW
#define petscintview_              PETSCINTVIEW
#elif !defined(PETSC_HAVE_FORTRAN_UNDERSCORE)
#define petscpusherrorhandler_   petscpusherrorhandler
#define petsctracebackerrorhandler_   petsctracebackerrorhandler
#define petscaborterrorhandler_       petscaborterrorhandler
#define petscignoreerrorhandler_      petscignoreerrorhandler
#define petscemacsclienterrorhandler_ petscemacsclienterrorhandler
#define petscattachdebuggererrorhandler_   petscattachdebuggererrorhandler
#define petscerror_                petscerror
#define petscerrorf_                petscerrorf
#define petscerrormpi_             petscerrormpi
#define petscrealview_             petscrealview
#define petscintview_              petscintview
#endif

static void (*f2)(MPI_Comm *comm,int*,const char*,const char*,PetscErrorCode*,PetscErrorType*,const char*,void*,PetscErrorCode*,PETSC_FORTRAN_CHARLEN_T len1,PETSC_FORTRAN_CHARLEN_T len2,PETSC_FORTRAN_CHARLEN_T len3);

/* These are not extern C because they are passed into non-extern C user level functions */
static PetscErrorCode ourerrorhandler(MPI_Comm comm,int line,const char *fun,const char *file,PetscErrorCode n,PetscErrorType p,const char *mess,void *ctx)
{
  PetscErrorCode ierr = 0;
  size_t         len1,len2,len3;

  PetscStrlen(fun,&len1);
  PetscStrlen(file,&len2);
  PetscStrlen(mess,&len3);

  (*f2)(&comm,&line,fun,file,&n,&p,mess,ctx,&ierr,((PETSC_FORTRAN_CHARLEN_T)(len1)),((PETSC_FORTRAN_CHARLEN_T)(len2)),((PETSC_FORTRAN_CHARLEN_T)(len3)));
  return ierr;
}

/*
        These are not usually called from Fortran but allow Fortran users
   to transparently set these monitors from .F code
*/
PETSC_EXTERN void petsctracebackerrorhandler_(MPI_Comm *comm,int *line,const char *fun,const char *file,PetscErrorCode *n,PetscErrorType *p,const char *mess,void *ctx,PetscErrorCode *ierr)
{
  *ierr = PetscTraceBackErrorHandler(*comm,*line,fun,file,*n,*p,mess,ctx);
}

PETSC_EXTERN void petscaborterrorhandler_(MPI_Comm *comm,int *line,const char *fun,const char *file,PetscErrorCode *n,PetscErrorType *p,const char *mess,void *ctx,PetscErrorCode *ierr)
{
  *ierr = PetscAbortErrorHandler(*comm,*line,fun,file,*n,*p,mess,ctx);
}

PETSC_EXTERN void petscattachdebuggererrorhandler_(MPI_Comm *comm,int *line,const char *fun,const char *file,PetscErrorCode *n,PetscErrorType *p,const char *mess,void *ctx,PetscErrorCode *ierr)
{
  *ierr = PetscAttachDebuggerErrorHandler(*comm,*line,fun,file,*n,*p,mess,ctx);
}

PETSC_EXTERN void petscemacsclienterrorhandler_(MPI_Comm *comm,int *line,const char *fun,const char *file,PetscErrorCode *n,PetscErrorType *p,const char *mess,void *ctx,PetscErrorCode *ierr)
{
  *ierr = PetscEmacsClientErrorHandler(*comm,*line,fun,file,*n,*p,mess,ctx);
}

PETSC_EXTERN void petscignoreerrorhandler_(MPI_Comm *comm,int *line,const char *fun,const char *file,PetscErrorCode *n,PetscErrorType *p,const char *mess,void *ctx,PetscErrorCode *ierr)
{
  *ierr = PetscIgnoreErrorHandler(*comm,*line,fun,file,*n,*p,mess,ctx);
}

PETSC_EXTERN void petscpusherrorhandler_(void (*handler)(MPI_Comm *comm,int*,const char*,const char*,PetscErrorCode*,PetscErrorType*,const char*,void*,PetscErrorCode*,PETSC_FORTRAN_CHARLEN_T len1,PETSC_FORTRAN_CHARLEN_T len2,PETSC_FORTRAN_CHARLEN_T len3),void *ctx,PetscErrorCode *ierr)
{
  if ((void(*)(void))handler == (void(*)(void))petsctracebackerrorhandler_) *ierr = PetscPushErrorHandler(PetscTraceBackErrorHandler,0);
  else {
    f2    = handler;
    *ierr = PetscPushErrorHandler(ourerrorhandler,ctx);
  }
}

PETSC_EXTERN void petscerror_(MPI_Fint *comm,PetscErrorCode *number,PetscErrorType *p,char* message,PETSC_FORTRAN_CHARLEN_T len)
{
  PetscErrorCode nierr,*ierr = &nierr;
  char *t1;
  FIXCHAR(message,len,t1);
  nierr = PetscError(MPI_Comm_f2c(*(comm)),0,NULL,NULL,*number,*p,"%s",t1);
  FREECHAR(message,t1);
}

#if defined(PETSC_HAVE_FORTRAN_FREE_LINE_LENGTH_NONE)
PETSC_EXTERN void petscerrorf_(PetscErrorCode *err,int *line,char *file,PETSC_FORTRAN_CHARLEN_T len)
{
  char           *tfile;
  PetscErrorCode derr,*ierr = &derr; /* needed by FIXCHAR */

  FIXCHAR(file,len,tfile);
  PetscError(PETSC_COMM_SELF,*line,NULL,tfile,*err,PETSC_ERROR_REPEAT,NULL);
  FREECHAR(file,tfile);
}

PETSC_EXTERN void petscerrormpi_(PetscErrorCode *err,int *line,char *file,PETSC_FORTRAN_CHARLEN_T len)
{
  char           errorstring[2*MPI_MAX_ERROR_STRING];
  char           *tfile;
  PetscErrorCode derr,*ierr = &derr; /* needed by FIXCHAR */

  FIXCHAR(file,len,tfile);
  PetscMPIErrorString(*err,errorstring);
  PetscError(PETSC_COMM_SELF,*line,NULL,file,PETSC_ERR_MPI,PETSC_ERROR_INITIAL,"MPI error %d %s",*err,errorstring);
  FREECHAR(file,tfile);
  *err = PETSC_ERR_MPI;
}
#else
PETSC_EXTERN void petscerrorf_(PetscErrorCode *err)
{
  PetscError(PETSC_COMM_SELF,0,NULL,NULL,*err,PETSC_ERROR_REPEAT,NULL);
}

PETSC_EXTERN void petscerrormpi_(PetscErrorCode *err)
{
  char           errorstring[2*MPI_MAX_ERROR_STRING];

  PetscMPIErrorString(*err,errorstring);
  PetscError(PETSC_COMM_SELF,0,NULL,NULL,PETSC_ERR_MPI,PETSC_ERROR_INITIAL,"MPI error %d %s",*err,errorstring);
  *err = PETSC_ERR_MPI;
}
#endif

PETSC_EXTERN void petscrealview_(PetscInt *n,PetscReal *d,PetscViewer *viwer,PetscErrorCode *ierr)
{
  PetscViewer v;
  PetscPatchDefaultViewers_Fortran(viwer,v);
  *ierr = PetscRealView(*n,d,v);
}

PETSC_EXTERN void petscintview_(PetscInt *n,PetscInt *d,PetscViewer *viwer,PetscErrorCode *ierr)
{
  PetscViewer v;
  PetscPatchDefaultViewers_Fortran(viwer,v);
  *ierr = PetscIntView(*n,d,v);
}

#if defined(PETSC_HAVE_FORTRAN_CAPS)
#define petscscalarview_             PETSCSCALARVIEW
#elif !defined(PETSC_HAVE_FORTRAN_UNDERSCORE)
#define petscscalarview_             petscscalarview
#endif

PETSC_EXTERN void petscscalarview_(PetscInt *n,PetscScalar *d,PetscViewer *viwer,PetscErrorCode *ierr)
{
  PetscViewer v;
  PetscPatchDefaultViewers_Fortran(viwer,v);
  *ierr = PetscScalarView(*n,d,v);
}