/*

* Copyright (c) 2010 Nokia Corporation and/or its subsidiary(-ies).

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of "Eclipse Public License v1.0"

* which accompanies this distribution, and is available

* at the URL "http://www.eclipse.org/legal/epl-v10.html".

*

* Initial Contributors:

* Nokia Corporation - initial contribution.

*

* Contributors:

*

* Description:

*

*/

#undef G_DISABLE_ASSERT

#undef G_LOG_DOMAIN

#include <glib.h>

#include <stdio.h>

#ifdef SYMBIAN

#include "mrt2_glib2_test.h"

#endif /*SYMBIAN*/

/* Outputs tested against the reference implementation mt19937ar.c from

   http://www.math.keio.ac.jp/~matumoto/MT2002/emt19937ar.html */

/* Tests for a simple seed, first number is the seed */

const guint32 first_numbers[] = 

{

  0x7a7a7a7a,

  0xfdcc2d54,

  0x3a279ceb,

  0xc4d39c33,

  0xf31895cd,

  0x46ca0afc,

  0x3f5484ff,

  0x54bc9557,

  0xed2c24b1,

  0x84062503,

  0x8f6404b3,

  0x599a94b3,

  0xe46d03d5,

  0x310beb78,

  0x7bee5d08,

  0x760d09be,

  0x59b6e163,

  0xbf6d16ec,

  0xcca5fb54,

  0x5de7259b,

  0x1696330c,

};

/* array seed */

const guint32 seed_array[] =

{

  0x6553375f,

  0xd6b8d43b,

  0xa1e7667f,

  0x2b10117c

};

/* tests for the array seed */

const guint32 array_outputs[] =

{

  0xc22b7dc3,

  0xfdecb8ae,

  0xb4af0738,

  0x516bc6e1,

  0x7e372e91,

  0x2d38ff80,

  0x6096494a,

  0xd162d5a8,

  0x3c0aaa0d,

  0x10e736ae

};

const gint length = sizeof (first_numbers) / sizeof (first_numbers[0]);

const gint seed_length = sizeof (seed_array) / sizeof (seed_array[0]);

const gint array_length = sizeof (array_outputs) / sizeof (array_outputs[0]);

int main()

{

  guint n;

  guint ones;

  double proportion;

  GRand* rand;// = g_rand_new_with_seed (first_numbers[0]);

  GRand* copy;

  #ifdef SYMBIAN

  g_log_set_handler (NULL,  G_LOG_FLAG_FATAL| G_LOG_FLAG_RECURSION | G_LOG_LEVEL_CRITICAL | G_LOG_LEVEL_WARNING | G_LOG_LEVEL_MESSAGE | G_LOG_LEVEL_INFO | G_LOG_LEVEL_DEBUG, &mrtLogHandler, NULL);

  g_set_print_handler(mrtPrintHandler);

  #endif /*SYMBIAN*/

  rand = g_rand_new_with_seed (first_numbers[0]);

  for (n = 1; n < length; n++)

    g_assert (first_numbers[n] == g_rand_int (rand));

  g_rand_set_seed (rand, 2);

  g_rand_set_seed_array (rand, seed_array, seed_length);

  for (n = 0; n < array_length; n++)

    g_assert (array_outputs[n] == g_rand_int (rand));

  copy = g_rand_copy (rand);

  for (n = 0; n < 100; n++)

    g_assert (g_rand_int (copy) == g_rand_int (rand));

 // for (n = 1; n < 100000; n++)

  for (n = 1; n < 100000; n++)

    {

      gint32 i;

      gdouble d;

      gboolean b;

      i = g_rand_int_range (rand, 8,16);

      g_assert (i >= 8 && i < 16);

      i = g_random_int_range (8,16);

      g_assert (i >= 8 && i < 16);

      d = g_rand_double (rand);

      g_assert (d >= 0 && d < 1);

      d = g_random_double ();

      g_assert (d >= 0 && d < 1);

      d = g_rand_double_range (rand, -8, 32);

      g_assert (d >= -8 && d < 32);

      d = g_random_double_range (-8, 32);

      g_assert (d >= -8 && d < 32);

      b = g_random_boolean ();

      g_assert (b == TRUE || b  == FALSE);

      b = g_rand_boolean (rand);

      g_assert (b == TRUE || b  == FALSE);     

    }

  /* Statistical sanity check, count the number of ones

   * when getting random numbers in range [0,3) and see

   * that it must be semi-close to 0.25 with a VERY large

   * probability */

  ones = 0;

  for (n = 1; n < 100000; n++)

    {

      if (g_random_int_range (0, 4) == 1)

        ones ++;

    }

  proportion = (double)ones / (double)100000;

  /* 0.025 is overkill, but should suffice to test for some unreasonability */

  g_assert (ABS (proportion - 0.25) < 0.025);

  g_rand_free (rand);

  g_rand_free (copy);

#ifdef SYMBIAN

  testResultXml("rand-test");

#endif /* EMULATOR */

  return 0;

}