/*
** Returns 1 if the given directory contains a file named .fslckout, 2
** if it contains a file named _FOSSIL_, else returns 0.
*/
int dir_has_ckout_db(const char *zDir){
  int rc = 0;
  i64 sz;
  char * zCkoutDb = mprintf("%//.fslckout", zDir);
  if(file_isfile(zCkoutDb, ExtFILE)){
    rc = 1;
  }else{
    fossil_free(zCkoutDb);
    zCkoutDb = mprintf("%//_FOSSIL_", zDir);
    if(file_isfile(zCkoutDb, ExtFILE)){
      rc = 2;
    }
  }
  if( rc && ((sz = file_size(zCkoutDb, ExtFILE))<1024 || (sz%512)!=0) ){
    rc = 0;
  }
  fossil_free(zCkoutDb);
  return rc;
}

/*
** This is the implementation of inode(FILENAME) SQL function.