#define RCSID "$Id: Numeric.c,v 1.6 2006/02/26 00:42:54 geuzaine Exp $"
/*
 * Copyright (C) 1997-2006 P. Dular, C. Geuzaine
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
 * USA.
 *
 * Please report all bugs and problems to <getdp@geuz.org>.
 */

#include "GetDP.h"
#include "Numeric.h"

/* Check GSL version. We need at least 1.2, since all versions <=
   1.1.1 have a buggy SVD routine (infinite loop fixed on Sun Jun 16
   11:45:29 2002 in GSL's cvs tree). We check this at run time since
   GetDP could be distributed with the gsl dynamically linked. */

#if defined(HAVE_GSL)

#include <gsl/gsl_version.h>
#include <gsl/gsl_errno.h>

void new_handler(const char *reason, const char *file, int line,
                 int gsl_errno){
  Msg(GERROR, "GSL: %s (%s, line %d)", reason, file, line);
}

int check_gsl(){
  /* check version */
  int major, minor;
  sscanf(gsl_version, "%d.%d", &major, &minor);
  if(major < 1 || (major == 1 && minor < 2)) {
    Msg(DIRECT, ERROR_STR "Your GSL version (%d.%d.X) has a bug in the singular value",
        major, minor);
    Msg(DIRECT, ERROR_STR "decomposition code. Please upgrade to version 1.2 or above.");
    Msg(GERROR, "You can download the GSL from http://sources.redhat.com/gsl/");
    return 0;
  }
  /* set new error handler */
  gsl_set_error_handler(&new_handler);
  return 1;
}

#else

int check_gsl(){
  return 1;
}

#endif