/* ========================================================================= */
/* === amd_f77wrapper ====================================================== */
/* ========================================================================= */

/* ------------------------------------------------------------------------- */
/* AMD Copyright (c) by Timothy A. Davis,				     */
/* Patrick R. Amestoy, and Iain S. Duff.  See ../README.txt for License.     */
/* email: DrTimothyAldenDavis@gmail.com                                      */
/* ------------------------------------------------------------------------- */

/* Fortran interface for the C-callable AMD library (int version only).  This
 * is HIGHLY non-portable.  You will need to modify this depending on how your
 * Fortran and C compilers behave.  Two examples are provided.
 *
 * To avoid using I/O, and to avoid the extra porting step of a Fortran
 * function, the status code is returned as the first entry in P (P [0] in C
 * and P (1) in Fortran) if an error occurs.  The error codes are negative
 * (-1: out of memory, -2: invalid matrix).
 *
 * For some C and Fortran compilers, the Fortran compiler appends a single "_"
 * after each routine name.  C doesn't do this, so the translation is made
 * here.  Some Fortran compilers don't append an underscore (xlf on IBM AIX,
 * for * example).
 *
 * Tested with the following compilers:
 * Solaris with cc and f77 from Sun WorkShop 6 update 1.
 * SGI Irix with MIPSpro cc and f77 compilers version 7.4
 * Linux with GNU gcc or Intel's icc, and GNU g77 Intel's ifc Fortran compiler.
 *	(any combination).  Note that with g77, a call to amd_order in Fortran
 *	gets translated to a call to amd_order__, with two underscores ("_").
 *	Thus, the Fortran names do not include an underscore.
 */

#include "amd.h"
#include <stdio.h>

/* ------------------------------------------------------------------------- */
/* Linux, Solaris, SGI */
/* ------------------------------------------------------------------------- */

void amdorder_ (int *n, const int *Ap, const int *Ai, int *P,
    double *Control, double *Info)
{
    int result = amd_order (*n, Ap, Ai, P, Control, Info) ;
    if (result != AMD_OK && P) P [0] = result ;
}

void amddefaults_ (double *Control)
{
    amd_defaults (Control) ;
}

void amdcontrol_ (double *Control)
{
    fflush (stdout) ;
    amd_control (Control) ;
    fflush (stdout) ;
}

void amdinfo_ (double *Info)
{
    fflush (stdout) ;
    amd_info (Info) ;
    fflush (stdout) ;
}

/* ------------------------------------------------------------------------- */
/* IBM AIX.  Probably Windows, Compaq Alpha, and HP Unix as well. */
/* ------------------------------------------------------------------------- */

void amdorder (int *n, const int *Ap, const int *Ai, int *P,
    double *Control, double *Info)
{
    int result = amd_order (*n, Ap, Ai, P, Control, Info) ;
    if (result != AMD_OK && P) P [0] = result ;
}

void amddefaults (double *Control)
{
    amd_defaults (Control) ;
}

void amdcontrol (double *Control)
{
    fflush (stdout) ;
    amd_control (Control) ;
    fflush (stdout) ;
}

void amdinfo (double *Info)
{
    fflush (stdout) ;
    amd_info (Info) ;
    fflush (stdout) ;
}
