if((ret_value = H5B_iterate(idx_info->f, idx_info->dxpl_id, H5B_BTREE, idx_info->storage->idx_addr, H5D__btree_idx_iterate_cb, &udata)) < 0)
 
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
 * Copyright by The HDF Group.                                               *
 * Copyright by the Board of Trustees of the University of Illinois.         *
 * All rights reserved.                                                      *
 *                                                                           *
 * This file is part of HDF5.  The full HDF5 copyright notice, including     *
 * terms governing use, modification, and redistribution, is contained in    *
 * the COPYING file, which can be found at the root of the source code       *
 * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
 * If you do not have access to either file, you may request a copy from     *
 * help@hdfgroup.org.                                                        *
 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
/* Programmer:  Robb Matzke <matzke@llnl.gov>
 *          Wednesday, October  8, 1997
 *
 * Purpose: v1 B-tree indexed (chunked) I/O functions.  The chunks are
 *              given a multi-dimensional index which is used as a lookup key
 *              in a B-tree that maps chunk index to disk address.
 *
 */
/****************/
/* Module Setup */
/****************/
#define H5D_PACKAGE     /*suppress error about including H5Dpkg   */
/***********/
/* Headers */
/***********/
#include "H5private.h"      /* Generic Functions            */
#include "H5Bprivate.h"     /* B-link trees             */
#include "H5Dpkg.h"     /* Datasets             */
#include "H5Eprivate.h"     /* Error handling           */
#include "H5Fprivate.h"     /* Files                */
#include "H5FDprivate.h"    /* File drivers             */
#include "H5FLprivate.h"    /* Free Lists                           */
#include "H5Iprivate.h"     /* IDs                  */
#include "H5MFprivate.h"    /* File space management        */
#include "H5Oprivate.h"     /* Object headers           */
#include "H5Sprivate.h"         /* Dataspaces                           */
#include "H5VMprivate.h"        /* Vector and array functions       */
/****************/
/* Local Macros */
/****************/
/*
 * Given a B-tree node return the dimensionality of the chunks pointed to by