/**********************************************************************
* This source code is public domain, and may be freely distributed,   *
* modified, and used for any purpose.  IT COMES WITH ABSOLUTELY NO    *
* WARRANTY OF ANY KIND.	                                              *
**********************************************************************/

#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include "dt_smiles.h"
#include "dt_finger.h"

#define TRUE 1
#define FALSE 0

/***************************************************************************
* FUNCTION: du_name2fp
*
* DESCRIPTION:
*	Fingerprinting ASCII text.
*	Function which takes a string of characters and builds a molecule
*       object.  Generates that molecules fingerprint and returns it.  
*       Returns NULL_OB if it cannot create a fingerprint.
*
* RETURNS: (dt_Handle) a fingerprint object.
***************************************************************************/

dt_Handle du_name2fp(dt_Integer namelen, dt_String namestr, dt_Boolean dofold)
{
  dt_Integer char_count, current_char;
  dt_Handle mol, atom, fp;
  dt_Handle last_atom = NULL_OB;

  /**** Make a new, empty molecule object ****/

  if (NULL_OB == (mol = dt_alloc_mol())) return(NULL_OB);
  dt_mod_on(mol);

  /**** Loop through each character and add an atom.  ****/

  for (char_count = 0; char_count < namelen; char_count++)
    {
      current_char = (dt_Integer)*(namestr + char_count);
      
      /**** If one of the printable characters, add an atom for it ****/
      if ((current_char > 47) && (current_char < 123))
	{
	  atom = dt_addatom(mol, current_char - 46, 1);
	  dt_setaromatic(atom, FALSE);
	  dt_addbond(last_atom, atom, DX_BTY_SINGLE);
	  last_atom = atom;
	}
      /**** If space, don't connect the words ****/
      if (current_char == 32) last_atom = NULL_OB;
    }
    
  /**** Make a fingerprint object ****/

  fp = dt_fp_fingerprint(mol, dofold);
  dt_dealloc(mol);
  return (fp);
}