/*

Copyright (C) 2005, 2007, 2008, 2009 David Bateman
Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005 Andy Adler

This file is part of Octave.

Octave 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 3 of the License, or (at your
option) any later version.

Octave 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 Octave; see the file COPYING.  If not, see
<http://www.gnu.org/licenses/>.

*/

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include <stdio.h>
#include <stdarg.h>
#include "lo-error.h"
#include "sparse-util.h"

// FIXME this overload is here due to API change in SuiteSparse (3.1 -> 3.2)
void
SparseCholError (int status, char *file, int line, char *message)
{
  SparseCholError (status, file, line, message);
}

void
SparseCholError (int status, const char *file, int line, const char *message)
{
  (*current_liboctave_warning_handler)("warning %i, at line %i in file %s",
				     status, line, file);

  (*current_liboctave_warning_handler)(message);
}

int
SparseCholPrint (const char *fmt, ...)
{
  va_list args;
  va_start (args, fmt);
  int ret = vfprintf (stderr, fmt, args);
  fflush (stderr);
  va_end (args);
  return ret;
}


bool
sparse_indices_ok (octave_idx_type *r, octave_idx_type *c,
		   octave_idx_type nrows, octave_idx_type ncols,
		   octave_idx_type nnz)
{
  if (nnz > 0)
    {
      if (c[0] != 0)
	{
	  (*current_liboctave_error_handler)
	    ("invalid sparse matrix: cidx[0] must be zero");
	  return false;
	}

      octave_idx_type jold = 0;

      for (octave_idx_type j = 1; j < ncols+1; j++)
	{
	  if (c[j] < c[j-1])
	    {
	      (*current_liboctave_error_handler)
		("invalid sparse matrix: cidx elements must appear in ascending order");
	      return false;
	    }

	  if (c[j] > nnz)
	    {
	      (*current_liboctave_error_handler)
		("invalid sparse matrix: cidx[%d] = %d exceeds number of nonzero elements", j, c[j]+1);
	      return false;
	    }

	  if (c[j] != jold)
	    {
	      for (octave_idx_type i = jold+1; i < c[j]; i++)
		{
		  if (r[i] < r[i-1])
		    {
		      (*current_liboctave_error_handler)
			("invalid sparse matrix: ridx elements must appear in ascending order for each column");
		      return false;
		    }

		  if (r[i] >= nrows)
		    {
		      (*current_liboctave_error_handler)
			("invalid sparse matrix: ridx[%d] = %d out of range",
			 i, r[i]+1);
		      return false;
		    }
		}

	      jold = c[j];
	    }
	}
    }

  return true;
}

/*
;;; Local Variables: ***
;;; mode: C++ ***
;;; End: ***
*/
