# include <stdio.h>
# include <stdlib.h>
# include <time.h>

# include "ppc_array.h"
# include "ppc_haar.h"

int main ( );
void haar_vector_test ( int n );
void haar_matrix_test ( int m, int n );
void timestamp ( );

/******************************************************************************/

int main ( )

/******************************************************************************/
/*
  Purpose:

    ppc_haar_test() tests ppc_haar().

  Licensing:

    This code is distributed under the MIT license. 

  Modified:

    12 September 2023

  Author:

    John Burkardt
*/
{
  int m;
  int n;

  timestamp ( );
  printf ( "\n" );
  printf ( "ppc_haar_test():\n" );
  printf ( "  C version\n" );
  printf ( "  Test ppc_haar().\n" );

  n = 8;
  haar_vector_test ( n );

  m = 4;
  n = 8;
  haar_matrix_test ( m, n );
/*
  Terminate.
*/
  printf ( "\n" );
  printf ( "ppc_haar_test():\n" );
  printf ( "  Normal end of execution.\n" );
  printf ( "\n" );
  timestamp ( );

  return 0;
}
/******************************************************************************/

void haar_vector_test ( int n )

/******************************************************************************/
/*
  Purpose:

    haar_vector_test() tests haar_vector_forward() and haar_vector_reverse().

  Licensing:

    This code is distributed under the MIT license. 

  Modified:

    11 September 2023

  Author:

    John Burkardt
*/
{
  int i;
  double *v;

  printf ( "\n" );
  printf ( "haar_vector_test():\n" );
/*
  Define a vector.
*/
  make_vector ( v, n );
  for ( i = 0; i < n; i++ )
  {
    v[i] = 1.0 / ( i + 1 );
  }
  printf ( "\n" );
  printf ( "  vector v:\n" );
  printf ( "\n" );
  print_vector ( " %g", v, n );
/*
  Compute forward transform.
*/
  haar_transform_vector ( v, n, WT_FWD );
  printf ( "\n" );
  printf ( "  vector v after forward transform:\n" );
  printf ( "\n" );
  print_vector ( " %g", v, n );
/*
  Compute reverse transform.
*/
  haar_transform_vector ( v, n, WT_REV );
  printf ( "\n" );
  printf ( "  vector v after reverse transform:\n" );
  printf ( "\n" );
  print_vector ( " %g", v, n );
/*
  Free memory.
*/
  free_vector ( v );
/*
  Terminate.
*/
  printf ( "\n" );
  printf ( "ppc_haar_test():\n" );
  printf ( "  Normal end of execution.\n" );
  printf ( "\n" );
  timestamp ( );

  return;
}
/******************************************************************************/

void haar_matrix_test ( int m, int n )

/******************************************************************************/
/*
  Purpose:

    haar_matrix_test() tests haar_matrix_forward() and haar_matrix_reverse().

  Licensing:

    This code is distributed under the MIT license. 

  Modified:

    12 September 2023

  Author:

    John Burkardt
*/
{
  double **a;
  int i;
  int j;

  printf ( "\n" );
  printf ( "haar_matrix_test():\n" );
/*
  Define a matrix.
*/
  make_matrix ( a, m, n );
  for ( j = 0; j < n; j++ )
  {
    for ( i = 0; i < m; i++ )
    {
      a[i][j] = 1.0 / ( i + j + 1 );
    }
  }
  printf ( "\n" );
  printf ( "  matrix a:\n" );
  printf ( "\n" );
  print_matrix ( " %g", a, m, n );
/*
  Compute forward transform.
*/
  haar_transform_matrix ( a, m, n, WT_FWD );
  printf ( "\n" );
  printf ( "  matrix a after forward transform:\n" );
  printf ( "\n" );
  print_matrix ( " %g", a, m, n );
/*
  Compute reverse transform.
*/
  haar_transform_matrix ( a, m, n, WT_REV );
  printf ( "\n" );
  printf ( "  matrix a after reverse transform:\n" );
  printf ( "\n" );
  print_matrix ( " %g", a, m, n );
/*
  Free memory.
*/
  free_matrix ( a );
/*
  Terminate.
*/
  printf ( "\n" );
  printf ( "ppc_haar_test():\n" );
  printf ( "  Normal end of execution.\n" );
  printf ( "\n" );
  timestamp ( );

  return;
}
/******************************************************************************/

void timestamp ( )

/******************************************************************************/
/*
  Purpose:

    timestamp() prints the current YMDHMS date as a time stamp.

  Example:

    17 June 2014 09:45:54 AM

  Licensing:

    This code is distributed under the MIT license. 

  Modified:

    17 June 2014

  Author:

    John Burkardt
*/
{
# define TIME_SIZE 40

  static char time_buffer[TIME_SIZE];
  const struct tm *tm;
  time_t now;

  now = time ( NULL );
  tm = localtime ( &now );

  strftime ( time_buffer, TIME_SIZE, "%d %B %Y %I:%M:%S %p", tm );

  printf ( "%s\n", time_buffer );

  return;
# undef TIME_SIZE
}