/* -*- mode: C++; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
// vim:sts=8:sw=8:ts=8:noet:sr:cino=>s,f0,{0,g0,(0,\:0,t0,+0,=s


/* Copyright (c) FFLAS-FFPACK
* Written by Clément Pernet <clement.pernet@imag.fr>
* ========LICENCE========
* This file is part of the library FFLAS-FFPACK.
*
* FFLAS-FFPACK is free software: you can redistribute it and/or modify
* it under the terms of the  GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
* ========LICENCE========
*/

#include "fflas-ffpack/fflas-ffpack-config.h"
#include <iostream>
#include <givaro/modular.h>

#define __FFLASFFPACK_HAVE_DTRTRI 1

#include "fflas-ffpack/fflas-ffpack.h"
#include "fflas-ffpack/utils/timer.h"
#include "fflas-ffpack/utils/fflas_io.h"
#include "fflas-ffpack/utils/args-parser.h"

#ifdef __FFLASFFPACK_USE_OPENMP
typedef FFLAS::OMPTimer TTimer;
#else
typedef FFLAS::Timer TTimer;
#endif


using namespace std;

int main(int argc, char** argv) {
  
	size_t iter = 1;
	int    q    = 1009;
	size_t    n    = 2000;
	std::string file = "";
  
	Argument as[] = {
		{ 'q', "-q Q", "Set the field characteristic (-1 for random).",  TYPE_INT , &q },
		{ 'n', "-n N", "Set the dimension of the matrix.",               TYPE_INT , &n },
		{ 'i', "-i R", "Set number of repetitions.",                     TYPE_INT , &iter },
		{ 'f', "-f FILE", "Set the input file (empty for random).",  TYPE_STR , &file },
		END_OF_ARGUMENTS
	};

	FFLAS::parseArguments(argc,argv,as);

  typedef Givaro::Modular<double> Field;
  typedef Field::Element Element;

  Field F(q);
  Element * A;

  TTimer chrono;
  double time=0.0;

  Field::RandIter G(F);
  for (size_t i=0;i<iter;++i){
    if (!file.empty()){
	    FFLAS::ReadMatrix (file.c_str(),F,n,n,A);
    } else {
      A = FFLAS::fflas_new<Element>(n*n);
      for (size_t j=0; j<(size_t) n*n; ++j)
	      G.random(*(A+j));
      for (size_t k=0;k<(size_t)n;++k)
	      while (F.isZero( G.random(*(A+k*(n+1)))));
    }

    chrono.clear();
    chrono.start();
    clapack_dtrtri(CblasRowMajor,CblasUpper, CblasNonUnit,n,A,n);
    chrono.stop();

    time+=chrono.usertime();
    FFLAS::fflas_delete( A);

  }
  
	// -----------
	// Standard output for benchmark - Alexis Breust 2014/11/14
	std::cout << "Time: " << time / double(iter)
			  << " Gfops: " << (2.*double(n)/1000.*double(n)/1000.*double(n)/1000.0) / time * double(iter) / 3.;
	FFLAS::writeCommandString(std::cout, as) << std::endl;

  return 0;
}