/*
 * BBS.......: The Dark Knight Returns
 * Date......: 1993-05-23
 *
 * This is an original work by Andy M Leighton and is placed in the
 * public domain.
 */

#include "hbapi.h"

HB_FUNC( GT_ATDIFF )
{
   if( HB_ISCHAR( 1 ) && HB_ISCHAR( 2 ) )
   {
      const char * s1  = hb_parc( 1 );
      const char * s2  = hb_parc( 2 );
      HB_ISIZ      len = hb_parclen( 2 );
      HB_ISIZ      pos;

      /* loop through comparing both strings
         NOTE: pos starts at 1, so as to return a string index
               for Cl*pper */

      for( pos = 1; ( pos <= len ) && ( *s1 == *s2 ); s2++, s1++ )
         pos++;

      if( pos > len )  /* strings match exactly */
         hb_retns( 0 );
      else
         hb_retns( pos );
   }
   else
      hb_retns( -1 );
}